/* CertiTips: a small, readable workshop layout with local fonts. */
@font-face { font-family: "Didact Gothic"; font-style: normal; font-weight: 400; font-display: swap; src: url("../fonts/didact-gothic-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "JetBrains Mono"; font-style: normal; font-weight: 400; font-display: swap; src: url("../fonts/jetbrains-mono-latin-400-normal.woff2") format("woff2"); }
:root {
  --paper: #fff;
  --white: #fff;
  --ink: #31333f;
  --muted: #606574;
  --line: #d9dde6;
  --scrollbar: #59616e;
  --accent: #c74634;
  --selected-surface: #59616e;
  --selected-ink: #fff;
  --red: #c74634;
  --red-dark: #a6382b;
  --tint: #f8eeea;
  --video-accent: #0d65ad;
  --blue: var(--video-accent);
  --blue-tint: #edf5ff;
  --sidebar-bg: #f0f2f6;
  --hover: #f0f2f6;
  --code-bg: #f0f2f6;
  --code-ink: #a82727;
  --note: #aa2828;
  --shadow: #31333f1c;
  --panel-shadow: 0 8px 36px var(--shadow);
  --on-red: #fff;
  --chrome-bg: #f1efed;
  --sidebar-width: 272px;
  --sidebar: var(--sidebar-width);
  --header: 76px;
  --section-nav-height: 44px;
  --course-groups-height: calc(20px + var(--section-nav-height) + 24px);
  --radius: 12px;
  --footer-height: 110px;
  --content-width: 1200px;
  --content-gutter: 40px;
  --dock-width: 420px;
  --layout-gap: 24px;
  --chat-launcher-size: 48px;
  --panel-height: max(460px, calc(100dvh - var(--header) - var(--footer-height) - 40px));
}
html[data-theme="dark"] {
  color-scheme: dark;
  --selected-surface: #414653;
  --paper: #0e1117;
  --white: #262730;
  --ink: #fafafa;
  --muted: #c5c8d2;
  --line: #454855;
  --scrollbar: #454855;
  --accent: #c74634;
  --red: #c74634;
  --red-dark: #a6382b;
  --tint: #46272d;
  --blue: #8bc6ff;
  --blue-tint: #1b2d44;
  --sidebar-bg: #1b1d25;
  --hover: #353844;
  --code-bg: #383b47;
  --code-ink: #ffc0c0;
  --note: #ffc0c0;
  --shadow: #0008;
  --on-red: #fff;
  --chrome-bg: #1b1d25;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
  scroll-padding-bottom: calc(var(--footer-height) + 16px);
}
body {
  --chat-space: 0px;
  --frame-left: max(var(--content-gutter), calc((100% - var(--content-width) - var(--chat-space)) / 2));
  --frame-width: min(var(--content-width), calc(100% - var(--chat-space) - 2 * var(--content-gutter)));
  margin: 0;
  padding-bottom: var(--footer-height);
  color: var(--ink);
  background: var(--paper);
  font-family:
    "Segoe UI",
    system-ui,
    -apple-system,
    sans-serif;
  font-size: 16px;
  line-height: 1.65;
}
a {
  color: var(--red);
  text-underline-offset: 3px;
}
a:hover {
  color: var(--red-dark);
}
button,
input,
select {
  font: inherit;
}
button,
a {
  -webkit-tap-highlight-color: transparent;
}
button {
  cursor: pointer;
}
input:not([type="button"]):not([type="checkbox"]):not([type="color"]):not([type="file"]):not([type="hidden"]):not([type="image"]):not([type="radio"]):not([type="range"]):not([type="reset"]):not([type="submit"]):enabled:hover,
textarea:enabled:hover,
.search-toggle:hover {
  border-color: var(--red);
}
img {
  max-width: 100%;
  height: auto;
}
button:disabled {
  cursor: default;
  opacity: 0.55;
}
:focus-visible {
  border-radius: 7px;
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}
h1,
h2,
h3,
p {
  margin-top: 0;
}
h1,
h2,
h3 {
  line-height: 1.2;
  letter-spacing: -0.025em;
}
h1 {
  font-size: clamp(2rem, 3.6vw, 3.3rem);
  font-weight: 680;
}
h2 {
  font-size: 1.65rem;
}
h3 {
  font-size: 1.2rem;
}
p {
  margin-bottom: 1.1em;
}
small {
  font-size: 0.8rem;
}
strong {
  font-weight: 650;
}
.site-header {
  height: var(--header);
  position: sticky;
  top: 0;
  z-index: 70;
  background: var(--chrome-bg);
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 max(40px, calc((100% - 1200px) / 2)) 0 36px;
  gap: 12px;
}
.brand, .certichat-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  font-size: 1.45rem;
  font-weight: 750;
  letter-spacing: -0.7px;
  line-height: 1.15;
}
.certichat-heading { display: flex; justify-content: space-between; align-items: flex-start; padding: 12px 16px 8px; margin-bottom: 8px; border-bottom: 1px solid var(--line); background: var(--white); }
.certichat-spinner { display: inline-block; width: 32px; height: 32px; border: 3px solid var(--line); border-top-color: var(--red); border-radius: 50%; animation: certichat-spin .8s linear infinite; }
@keyframes certichat-spin { to { transform: rotate(360deg); } }
.brand:hover {
  color: var(--ink);
}
.site-header > .brand { margin-right: auto; flex-shrink: 0; }
.brand-accent {
  color: var(--accent);
}
.brand small, .certichat-brand small {
  display: block;
  font-size: 8px;
  font-weight: 650;
  letter-spacing: 1.8px;
  margin-top: 5px;
  color: var(--muted);
}
.path-nav {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-left: auto;
}
.course-groups {
  position: fixed;
  top: calc(var(--header) + 20px);
  left: max(40px, (100% - 1200px) / 2);
  width: min(1200px, calc(100% - 80px));
  height: var(--section-nav-height);
  z-index: 65;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 0 24px 3px;
  border: 1px solid var(--line);
  border-top: 4px solid var(--red);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--panel-shadow);
}
.course-breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 0.82rem; color: var(--muted); white-space: nowrap; }
.course-breadcrumb a { color: var(--ink); }
.course-breadcrumb a[aria-current] { text-decoration: none; }
.has-course-groups #main { margin-top: var(--course-groups-height); }
.has-course-groups .sidebar { top: calc(var(--header) + var(--course-groups-height)); }
html:has(.has-course-groups) { scroll-padding-top: calc(var(--header) + var(--course-groups-height) + 24px); }
.certitips-page .path-section { scroll-margin-top: 0; }
.path-group {
  position: relative;
}
.path-group summary {
  color: var(--ink);
  white-space: nowrap;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  border-radius: 7px;
  padding: 9px 12px;
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}
.path-nav .path-group summary { min-height: calc(var(--section-nav-height) - 5px); }
.path-group summary::-webkit-details-marker { display: none; }
.path-group summary::after {
  content: "";
  width: 6px;
  height: 6px;
  margin: -3px 0 0 8px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
}
.path-group[open] summary::after { transform: rotate(225deg); margin-top: 3px; }
.path-group summary:is(:hover, :focus-visible) {
  background: transparent;
  color: var(--red);
}
.path-nav .path-group[open] > summary {
  background: transparent;
  color: var(--red);
}
.path-group-panel a:is(:hover, :focus-visible) {
  background: var(--hover);
  color: var(--ink);
}
.path-group-panel {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  left: auto;
  width: min(340px, calc(100vw - 24px));
  display: grid;
  gap: 2px;
  padding: 9px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 9px;
  box-shadow: 0 16px 32px var(--shadow);
}
.path-group-panel a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 9px 12px;
  border: 1px solid transparent;
  color: var(--ink);
  text-decoration: none;
  border-radius: 6px;
  font-size: 0.8rem;
  line-height: 1.35;
  gap: 10px;
}
.path-group-panel a .coming-soon {
  visibility: hidden;
  margin-left: auto;
  flex: none;
  padding: 3px 6px;
  border-radius: 4px;
  background: #f1b13f;
  color: #5b3800;
  font-size: 0.7rem;
  font-weight: 400;
  white-space: nowrap;
}
.path-group-panel a:hover .coming-soon,
.path-group-panel a:focus-visible .coming-soon { visibility: visible; }
.path-nav-mobile {
  display: none;
  position: static;
  margin-left: auto;
}
.path-nav-mobile summary {
  list-style: none;
  cursor: pointer;
  width: 44px;
  height: 44px;
  min-height: 44px;
  padding: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--ink);
  background: var(--paper);
}
.course-groups .path-nav-mobile > summary { height: calc(var(--section-nav-height) - 5px); min-height: 0; }
.path-nav-mobile summary:is(:hover, :focus-visible),
.path-nav-mobile[open] summary {
  border-color: var(--red);
  color: var(--red);
}
.path-nav-mobile summary::-webkit-details-marker {
  display: none;
}
.path-nav-mobile-panel {
  position: static;
  width: 100%;
  max-height: calc(100dvh - var(--header) - 20px - var(--section-nav-height) - var(--footer-height));
  overflow-y: auto;
  padding: 8px;
  background: var(--paper);
  border-top: 1px solid var(--line);
  border-radius: 0 0 11px 11px;
}
.path-nav-mobile-panel > nav { display: grid; }
.path-nav-mobile .path-group-panel {
  position: static;
  width: auto;
  background: transparent;
  box-shadow: none;
  border: 0;
  border-left: 1px solid var(--line);
  border-radius: 0;
  padding: 6px 0 6px 12px;
  margin: 6px 12px 8px;
}
.path-nav-mobile .path-group summary {
  border: 0;
  width: 100%;
  justify-content: flex-start;
  text-align: left;
  background: transparent;
  color: var(--ink);
}
.path-nav-mobile .path-group summary:is(:hover, :focus-visible),
.path-nav-mobile .path-group[open] > summary {
  background: transparent;
  color: var(--red);
}
.theme-toggle, .language-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  min-height: 44px;
  padding: 8px;
  white-space: nowrap;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 7px;
  font-size: 0.78rem;
  font-weight: 650;
}
.theme-toggle:hover, .language-toggle:hover { border-color: var(--red); color: var(--red); }
.header-app-link { display: inline-flex; flex-shrink: 0; align-items: center; justify-content: center; width: 44px; height: 44px; padding: 8px; border: 1px solid var(--line); border-radius: 7px; background: var(--paper); color: var(--ink); text-decoration: none; }
.header-app-link:hover { border-color: var(--red); color: var(--red); }
.header-app-link[aria-current="page"], .header-app-link[aria-current="page"]:hover { border-color: var(--red); background: var(--red); color: #fff; cursor: default; }
@media (min-width: 481px) and (max-width: 600px) { .site-header .brand > span { display: none; } }
.site-header .menu-toggle { background: var(--paper); border-radius: 7px; }
.site-header .menu-toggle:hover { background: var(--paper); border-color: var(--red); color: var(--red); }
.theme-sun { display: none; }
html[data-theme="dark"] .theme-sun { display: block; }
html[data-theme="dark"] .theme-moon { display: none; }
.search-toggle {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  min-width: 184px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--paper);
  color: var(--ink);
  font-size: 0.8rem;
  text-align: left;
}
.search-toggle kbd {
  margin-left: auto;
}
#diagram-viewer kbd,
.search-toggle kbd {
  display: inline-flex;
  align-items: center;
  padding: 2px 5px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--chrome-bg);
  color: var(--muted);
  font-size: 0.62rem;
  white-space: nowrap;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  min-height: 48px;
  background: var(--accent);
  color: var(--on-red);
  border: 1px solid var(--accent);
  padding: 11px 22px;
  border-radius: 7px;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 650;
  line-height: 1.3;
}
.button:hover {
  background: #a6382b;
  border-color: #a6382b;
  color: var(--on-red);
}
.button-small {
  min-height: 40px;
  padding: 10px 16px;
  gap: 20px;
  font-size: 0.86rem;
}
.button-secondary {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.button-secondary:hover {
  background: var(--white);
  color: var(--ink);
}
.text-link {
  font-weight: 650;
  text-decoration: none;
  font-size: 0.92rem;
}
.eyebrow {
  font-size: 0.68rem;
  font-weight: 750;
  letter-spacing: 1.8px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 10px;
}
.live-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--blue);
  flex-shrink: 0;
}
.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 8px;
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 6px;
}
.course-page .menu-toggle { display: inline-flex; }
.menu-toggle:hover {
  background: var(--selected-surface);
  color: var(--selected-ink);
}
.site-header .menu-toggle[aria-expanded="true"], #diagram-viewer.is-presenting .dialog-toolbar [data-diagram-menu][aria-expanded="true"] { background: var(--red); border-color: var(--red); color: var(--on-red); }
.home-main {
  max-width: 1280px;
  margin: auto;
  padding: 0 40px;
}
.home-main:has(.home-hero) { container: home-main / inline-size; }
.home-hero {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: center;
  min-height: calc(100dvh - var(--header) - var(--footer-height));
  gap: clamp(32px, 4vw, 56px);
  padding: 20px 0;
}
.home-hero .hero-copy { display: flex; grid-column: 2; grid-row: 1; min-width: 0; align-self: stretch; flex-direction: column; align-items: flex-start; justify-content: center; container: hero-copy / inline-size; font-family: "Didact Gothic", "Segoe UI", sans-serif; font-synthesis: none; }
.hero-ambient {
  position: relative;
  isolation: isolate;
  grid-column: 2;
  grid-row: 1;
  align-self: stretch;
  margin: -20px calc(-1 * max(var(--content-gutter), (100vw - var(--content-width) - var(--chat-space)) / 2) - var(--chat-space)) -20px calc(-1 * clamp(32px, 4vw, 56px));
  transition: margin-right 360ms ease;
  overflow: hidden;
  pointer-events: none;
  z-index: -1;
  background:
    linear-gradient(115deg, rgba(199, 70, 52, 0.17), transparent 38%),
    radial-gradient(ellipse at 88% 12%, rgba(255, 154, 124, 0.18), transparent 42%),
    radial-gradient(ellipse at 12% 86%, rgba(6, 182, 212, 0.08), transparent 34%),
    var(--paper);
}
html[data-theme="dark"] .hero-ambient { background-color: #191715; }
html:not([data-theme="dark"]) .hero-ambient { background: var(--chrome-bg); }
.hero-ambient::before {
  content: "";
  position: absolute;
  inset: -42%;
  z-index: -1;
  background: conic-gradient(
    from 18deg,
    transparent 0deg,
    rgba(199, 70, 52, 0.05) 42deg,
    rgba(255, 154, 124, 0.42) 72deg,
    rgba(199, 70, 52, 0.16) 110deg,
    transparent 154deg,
    transparent 236deg,
    rgba(199, 70, 52, 0.28) 286deg,
    transparent 338deg
  );
  filter: blur(34px) saturate(135%);
  opacity: 0.78;
  transform: translate3d(-16%, -10%, 0) rotate(0deg) scale(1.04);
  animation: hero-magma-sweep 8.8s cubic-bezier(0.45, 0, 0.55, 1) infinite;
}
.hero-ambient::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(135deg, black, transparent 82%);
  opacity: 0.38;
}
html:not([data-theme="dark"]) .hero-ambient::before { filter: blur(34px) grayscale(1) brightness(.55); }
@keyframes hero-magma-sweep {
  0%, 100% { transform: translate3d(-20%, -12%, 0) rotate(0deg) scale(1.04); }
  32% { transform: translate3d(10%, -4%, 0) rotate(44deg) scale(1.12); }
  64% { transform: translate3d(16%, 14%, 0) rotate(118deg) scale(1.08); }
  82% { transform: translate3d(-6%, 8%, 0) rotate(188deg) scale(1.14); }
}
:is(.home-hero, .search-deck) .oracle-badge {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 36px;
  padding: 4px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--chrome-bg);
  color: var(--ink);
  font-size: 0.85rem;
  font-weight: 500;
  line-height: 1;
}
:is(.home-hero, .search-deck) .oracle-badge svg { width: 24px; height: 24px; flex: 0 0 auto; color: var(--accent); }
.home-hero h1 {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  font-weight: 750;
  font-size: clamp(2.2rem, 3.3vw, 2.8rem);
  overflow-wrap: anywhere;
  text-wrap: balance;
  line-height: 1.15;
  margin: 18px 0;
  letter-spacing: -0.7px;
}
.home-hero p {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 660px;
  line-height: 1.7;
}
.hero-actions { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); width: 100%; gap: 12px; margin-top: 12px; }
.hero-action { min-width: 0; padding: 16px; border: 1px solid var(--line); border-radius: 6px; color: var(--ink); text-align: left; text-decoration: none; transition: background-color .2s, border-color .2s; }
.hero-action, html:not([data-theme="dark"]) :is(.home-hero, .search-deck) .oracle-badge { background: var(--paper); }
.hero-action > span { display: flex; align-items: center; gap: 8px; font-family: "JetBrains Mono", monospace; font-size: .75rem; font-weight: 400; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); }
.hero-action svg { width: 14px; height: 14px; flex-shrink: 0; }
.hero-action strong { display: block; margin-top: 8px; font-size: .875rem; font-weight: 400; line-height: 1.5; }
.hero-action:is(:hover, :focus-visible) { border-color: var(--red); background: var(--tint); color: var(--ink); }
html[data-theme="dark"] .hero-action { border-color: #ffffff1a; background: #ffffff0d; }
html[data-theme="dark"] .hero-action:is(:hover, :focus-visible) { border-color: #c7463480; background: #c746341a; }
@container hero-copy (max-width: 440px) {
  .hero-actions { grid-template-columns: 1fr; }
  body:has(.certichat-panel:not([hidden]):not([data-voice-mode="true"])) .home-hero h1 { font-size: clamp(1.75rem, 10cqi, 2.4rem); }
}
/* ponytail: two 420px chat-width columns plus the 56px maximum gap; update if the dock width changes. */
@container home-main (max-width: 896px) {
  body:has(.certichat-panel:not([hidden]):not([data-voice-mode="true"])) .home-hero { grid-template-columns: minmax(0, 1fr); }
  body:has(.certichat-panel:not([hidden]):not([data-voice-mode="true"])) .home-hero :is(.hero-copy, .hero-ambient) { grid-column: 1; }
  body:has(.certichat-panel:not([hidden]):not([data-voice-mode="true"])) .hero-flow { display: none; }
  body:has(.certichat-panel:not([hidden]):not([data-voice-mode="true"])) .hero-ambient { margin-left: calc(-1 * var(--frame-left)); }
  body:has(.certichat-panel:not([hidden]):not([data-voice-mode="true"])) .home-hero h1 { font-size: clamp(1.75rem, 6cqi, 2.4rem); }
  html[data-theme="dark"] body:has(.certichat-panel:not([hidden]):not([data-voice-mode="true"])) .home-hero::before { display: none; }
}
.certichat .certichat-launcher {
  position: relative;
  isolation: isolate;
  color: #8f2c25;
  border: 1px solid var(--red);
  background-color: var(--chat-glass-surface);
  background-image: var(--chat-glass-texture);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  backdrop-filter: blur(16px) saturate(160%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .6), inset 0 -1px 0 rgba(199, 70, 52, .08), 0 3px 8px rgba(199, 70, 52, .08), 0 0 12px rgba(231, 131, 108, .1);
  transition: box-shadow .2s ease, border-color .2s ease;
}
.certichat .certichat-launcher::before {
  content: "";
  position: absolute;
  inset: -5px;
  z-index: -1;
  border-radius: inherit;
  background: linear-gradient(110deg, rgba(255, 174, 138, .34), rgba(204, 157, 237, .26));
  filter: blur(12px);
  opacity: .3;
  pointer-events: none;
}
.certichat .certichat-launcher:is(:hover, :focus-visible) {
  border-color: var(--red-dark);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .75), 0 4px 12px rgba(199, 70, 52, .12), 0 0 16px rgba(231, 131, 108, .16);
}
html[data-theme="dark"] .certichat .certichat-launcher {
  color: #ffe9df;
  border-color: rgba(255, 217, 199, .65);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .12), 0 3px 8px rgba(146, 91, 180, .18), 0 0 12px rgba(223, 107, 78, .09);
}
html[data-theme="dark"] .certichat .certichat-launcher:is(:hover, :focus-visible) {
  border-color: rgba(255, 217, 199, .65);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .18), 0 4px 12px rgba(146, 91, 180, .22), 0 0 16px rgba(223, 107, 78, .14);
}
@media (prefers-reduced-motion: reduce) {
  .certichat .certichat-launcher { transition: none; }
}
.certitips-link, .certiquiz-link, .certitube-link, .certichat-launcher { gap: 10px; }
.hero-flow {
  order: -1;
  grid-column: 1;
  grid-row: 1;
  min-width: 0;
  margin: 0;
  background: var(--paper);
  border: 0;
  overflow: hidden;
}
.hero-flow video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: var(--paper);
}
.hero-flow-fallback { display: none; padding: 32px; color: var(--ink); }
.hero-flow-fallback strong { color: var(--accent); }
.hero-flow-fallback p { color: var(--ink); margin: 14px 0; }
.hero-flow-fallback span { color: var(--muted); }
.hero-flow.is-unavailable video { display: none; }
.hero-flow.is-unavailable .hero-flow-fallback { display: block; }
@media (min-width: 801px) {
  html[data-theme="dark"] .home-hero::before { content: ""; grid-column: 1; grid-row: 1; margin: -20px 0 -20px -50vw; align-self: stretch; background: var(--chrome-bg); z-index: -1; }
  html[data-theme="dark"] .hero-flow, html[data-theme="dark"] .hero-flow video { background: var(--chrome-bg); }
  html[data-theme="dark"] .hero-flow video { mix-blend-mode: lighten; }
}
.path-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  column-gap: 24px;
  scroll-margin-top: calc(var(--header) + 72px);
  padding: 24px 24px 36px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}
.certitips-page .path-section { padding-bottom: 0; box-shadow: var(--panel-shadow); max-height: calc(100dvh - var(--header) - var(--footer-height) - var(--course-groups-height) - 2 * var(--layout-gap) - var(--chat-launcher-size)); grid-template-rows: auto minmax(0, 1fr); overflow: hidden; }
.certitips-page .path-carousel { padding-bottom: calc(2 * var(--layout-gap) + var(--chat-launcher-size)); }
.certitips-page .certification-list { min-height: 0; margin-right: calc(-1 * var(--layout-gap)); padding-right: var(--layout-gap); overflow-y: auto; scrollbar-color: var(--scrollbar) transparent; scrollbar-width: thin; }
.certitips-page .certification-item { scroll-margin-top: 0; }
@media (min-width: 801px) {
  .certitips-page:has(.certichat-panel:not([hidden]):not([data-voice-mode="true"])) .path-carousel { padding-bottom: 20px; }
  .certitips-page:has(.certichat-panel:not([hidden]):not([data-voice-mode="true"])) .path-section { max-height: calc(100dvh - var(--header) - var(--footer-height) - var(--course-groups-height) - 20px); }
}
.has-js .path-carousel > .path-section:not(.is-active) { display: none; }
.path-carousel > .path-section.is-active { animation: group-enter 220ms ease-out both; }
@keyframes group-enter { from { opacity: 0; } to { opacity: 1; } }
.path-section-heading {
  display: flow-root;
  grid-column: 1 / -1;
  grid-row: 1;
  margin-bottom: var(--layout-gap);
}
.path-section-heading h2 {
  margin: 9px 0 10px;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
}
.path-section-heading p {
  color: var(--muted);
  margin: 0;
}
.group-carousel-controls {
  float: right;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 10px;
  margin: 0 0 8px var(--layout-gap);
  color: var(--muted);
  font-size: 0.78rem;
}
.path-carousel { touch-action: pan-y; padding-bottom: 32px; container-type: inline-size; }
.group-carousel-controls button {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--white);
  color: var(--ink);
  font-size: 1.15rem;
  line-height: 0;
}
.group-carousel-controls button svg,
.page-navigation-arrow svg { display: block; }
.group-carousel-controls button:not(:disabled):hover { border-color: var(--red); color: var(--red); }
.group-carousel-controls button:disabled { opacity: 0.4; }
.certification-list {
  grid-column: 1 / -1;
  list-style: none;
  counter-reset: certification;
  padding: 0;
  margin: 0;
}
.certification-item {
  counter-increment: certification;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 20px;
  border-top: 1px solid var(--line);
  padding: 21px 0 21px 40px;
  position: relative;
  scroll-margin-top: calc(var(--header) + 72px);
}
.certification-number {
  position: absolute;
  left: 0;
  top: 23px;
  color: var(--red);
  font-family: monospace;
  font-weight: 700;
  font-size: 0.72rem;
}
.certification-number::before {
  content: counter(certification, decimal-leading-zero);
}
.path-section .certification-item > div:first-child { position: relative; }
.path-section .certification-number { left: -40px; top: 0; font-size: 0.65rem; }
.certification-level {
  display: block;
  color: var(--red);
  font-size: 0.65rem;
  font-weight: 750;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 4px;
}
.certification-item h3 {
  font-size: 1.1rem;
  margin: 0 0 5px;
}
.certification-item p {
  color: var(--muted);
  font-size: 0.85rem;
  margin: 0;
  line-height: 1.55;
}
.certification-item .certification-note {
  color: var(--note);
  margin-top: 8px;
  font-size: 0.78rem;
}
.certification-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 7px;
  font-size: 0.79rem;
  text-align: right;
}
.certification-actions .button {
  font-size: 0.78rem;
  min-height: 44px;
  gap: 9px;
}
.certification-actions > a:not(.button) {
  color: var(--muted);
}
@container (max-width: 500px) {
  .certification-item { grid-template-columns: 1fr; gap: 12px; }
  .certification-actions { align-items: flex-start; text-align: left; }
}
.certitips-button:disabled {
  opacity: 1;
  background: var(--hover);
  border-color: var(--line);
  color: var(--muted);
}
.subtle {
  font-size: 0.8rem;
  color: var(--muted);
}
.tag {
  display: inline-block;
  font-size: 0.58rem;
  letter-spacing: 1.8px;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 6px 10px;
}
.sidebar {
  display: flex;
  flex-direction: column;
  position: fixed;
  top: var(--header);
  bottom: var(--footer-height);
  left: 0;
  width: var(--sidebar-width);
  border-right: 1px solid var(--line);
  background: var(--sidebar-bg);
  padding: 26px 18px 0;
  overflow: hidden;
  z-index: 20;
  transition: left 360ms ease, transform 220ms ease, opacity 180ms ease, visibility 0s linear 0s;
}
.sidebar-heading {
  padding: 0 10px;
  flex-shrink: 0;
}
.sidebar-heading strong {
  display: block;
  font-size: 1.18rem;
  line-height: 1.35;
}
.exam-code {
  display: inline-block;
  font-family: monospace;
  font-size: 0.69rem;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 3px 8px;
  margin-bottom: 12px;
}
.course-progress {
  margin: 22px 10px 18px;
  flex-shrink: 0;
}
.sidebar > nav {
  flex: 1;
  min-height: 0;
  margin-right: -18px;
  padding-right: 18px;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-color: var(--scrollbar) transparent;
  scrollbar-width: thin;
  padding-bottom: 26px;
  caret-color: transparent;
}
.course-progress > div {
  display: flex;
  justify-content: space-between;
  font-size: 0.68rem;
  color: var(--muted);
}
progress {
  display: block;
  width: 100%;
  height: 5px;
  margin-top: 8px;
  border: 0;
  border-radius: 20px;
  overflow: hidden;
  accent-color: var(--accent);
}
progress::-webkit-progress-bar {
  background: var(--line);
}
progress::-webkit-progress-value {
  background: var(--accent);
}
.nav-label {
  display: block;
  font-size: 0.55rem;
  letter-spacing: 1.8px;
  color: var(--muted);
  padding: 20px 11px 9px;
  font-weight: 700;
}
.nav-link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  text-decoration: none;
  color: var(--muted);
  font-size: 0.81rem;
  padding: 10px 44px 10px 10px;
  border-radius: 6px;
  line-height: 1.5;
  min-height: 44px;
  cursor: pointer;
}
.nav-tree > li {
  position: relative;
}
.nav-toggle {
  position: absolute;
  top: 0;
  right: 0;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  color: var(--muted);
  cursor: pointer;
  list-style: none;
}
.nav-toggle::-webkit-details-marker {
  display: none;
}
.nav-toggle::after {
  content: "";
  width: 7px;
  height: 7px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(-45deg);
}
.nav-branch[open] > .nav-toggle::after {
  transform: rotate(45deg);
}
.nav-branch { interpolate-size: allow-keywords; }
.nav-link:hover {
  background: var(--hover);
  color: var(--ink);
}
.nav-link[aria-current="page"] {
  background: var(--selected-surface);
  color: var(--selected-ink);
  font-weight: 700;
}
.nav-link[aria-current="page"] .nav-number {
  opacity: 1;
}
.nav-link[aria-current="page"] + .nav-branch .nav-toggle {
  color: var(--selected-ink);
}
.nav-link.is-complete {
  background: var(--accent);
  color: #fff;
}
.nav-link.is-complete + .nav-branch .nav-toggle {
  color: #fff;
}
.nav-title {
  flex: 1;
  min-width: 0;
  overflow-wrap: anywhere;
}
.nav-tree,
.nav-sections {
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-tree > li + li {
  margin-top: 3px;
}
.nav-sections {
  margin: 5px 0 12px 18px;
  border-left: 1px solid var(--line);
  padding-left: 9px;
}
.nav-section-link {
  display: flex;
  align-items: center;
  min-height: 36px;
  border-radius: 5px;
  padding: 6px 8px;
  color: var(--muted);
  font-size: 0.77rem;
  line-height: 1.5;
  overflow-wrap: anywhere;
  text-decoration: none;
}
.nav-section-link:hover {
  color: var(--ink);
  background: var(--hover);
  text-decoration: underline;
}
.nav-number {
  font-family: monospace;
  font-size: 0.64rem;
  min-width: 17px;
  flex-shrink: 0;
  opacity: 0.85;
}
.course-page:not([data-page^="certitube"]) {
  --course-layout-width: var(--frame-width);
  --course-sidebar-offset: var(--frame-left);
}
.course-main {
  --reading-width: 1200px;
  --course-frame-width: calc(var(--reading-width) + 80px);
  margin-left: calc(var(--sidebar) + max(0px, (100% - var(--sidebar) - var(--chat-space) - var(--course-frame-width)) / 2));
  margin-right: calc(var(--chat-space) + max(0px, (100% - var(--sidebar) - var(--chat-space) - var(--course-frame-width)) / 2));
  padding: 20px 40px 64px;
  max-width: var(--course-frame-width);
  min-height: calc(100vh - 150px);
  transition: margin-left 220ms ease, margin-right 220ms ease;
}
.course-page:not([data-page^="certitube"]) .course-main {
  --course-frame-width: calc(var(--course-layout-width) - var(--sidebar));
  --reading-width: 100%;
}
.course-main.lesson-main {
  padding-bottom: calc(2 * var(--layout-gap) + var(--chat-launcher-size));
}
.course-page:has(.certichat.is-beside-content) .course-main.lesson-main { padding-bottom: var(--layout-gap); }
@media (max-width: 680px) {
  .site-header .brand > span { display: none; }
}
@media (min-width: 801px) {
  body:has(.certichat-panel:not([hidden]):not([data-voice-mode="true"])), html.chat-restoring body {
    --chat-space: calc(var(--dock-width) + var(--layout-gap));
    --content-gutter: 24px;
  }
  .site-header { padding-inline: var(--frame-left); transition: padding-left 360ms ease, padding-right 360ms ease; }
  .home-main:not(.certichat-main):not(.certisearch-main) {
    width: var(--frame-width);
    max-width: none;
    margin-left: var(--frame-left);
    margin-right: 0;
    padding-inline: 0;
    transition: width 360ms ease, margin-left 360ms ease;
  }
  .course-page:not([data-page^="certitube"]) { --sidebar: calc(var(--sidebar-width) + 24px); }
  .course-page:not([data-page^="certitube"]) .course-main {
    margin-left: calc(var(--sidebar) + var(--course-sidebar-offset));
    margin-right: calc(var(--chat-space) + var(--course-sidebar-offset));
    max-width: none;
    padding-inline: 0;
    transition: margin-left 360ms ease, margin-right 360ms ease;
  }
  .course-groups {
    left: var(--frame-left);
    width: var(--frame-width);
    max-width: var(--content-width);
    transition: left 360ms ease, width 360ms ease;
  }
  body.course-page:not([data-page^="certitube"]) {
    background-image: linear-gradient(var(--sidebar-bg), var(--sidebar-bg));
    background-size: calc(var(--course-sidebar-offset) + var(--sidebar-width)) 100%;
    background-attachment: fixed;
    background-repeat: no-repeat;
    transition: background-size 360ms ease;
  }
  body.course-page.is-compact-nav { background-size: 0 100%; }
  .course-page:not([data-page^="certitube"]) .sidebar {
    left: var(--course-sidebar-offset);
    padding-left: 0;
    transition: left 360ms ease, transform 360ms ease, visibility 0s linear 0s;
  }
  .course-page .sidebar-heading { padding-left: 0; }
  .course-page .course-progress { margin-left: 0; }
  .course-page .sidebar .nav-label { padding-left: 0; }
  .course-page.is-compact-nav { --sidebar: 0px; }
  .course-page.is-compact-nav .sidebar {
    left: 0;
    transform: translateX(-100%);
    visibility: hidden;
    pointer-events: none;
    transition: left 360ms ease, transform 360ms ease, visibility 0s linear 360ms;
  }
}
.page-heading {
  max-width: var(--reading-width, 1200px);
  margin-inline: auto;
  border-bottom: 1px solid var(--line);
  padding-bottom: 28px;
  margin-bottom: 28px;
}
.page-heading .eyebrow {
  color: var(--red);
}
.page-heading h1 {
  margin: 18px 0;
}
.lesson-heading h1 {
  margin-top: 0;
}
.page-lead {
  font-size: 1.07rem;
  color: var(--muted);
  line-height: 1.7;
  max-width: none;
  margin-bottom: 0;
}
.complete-button {
  display: flex;
  align-items: center;
  gap: 10px;
  width: fit-content;
  margin: 24px 0 0 auto;
  min-height: 44px;
  border: 1px solid var(--selected-surface);
  background: var(--selected-surface);
  border-radius: 30px;
  padding: 9px 18px;
  color: var(--selected-ink);
  font-size: 0.82rem;
  font-weight: 600;
  box-shadow: 0 8px 24px var(--shadow);
  cursor: pointer;
}
.complete-button:hover {
  filter: brightness(0.85);
}
.complete-switch { position: relative; flex-shrink: 0; width: 40px; height: 22px; border-radius: 11px; background: var(--selected-ink); }
.complete-switch::after { content: ""; position: absolute; width: 16px; height: 16px; top: 3px; left: 3px; border-radius: 50%; background: var(--selected-surface); }
.complete-button[aria-checked="true"] { background: var(--red); border-color: var(--red); color: var(--on-red); }
.complete-button[aria-checked="true"] .complete-switch { background: var(--red-dark); }
.complete-button[aria-checked="true"] .complete-switch::after { background: var(--on-red); transform: translateX(18px); }
.prose {
  max-width: var(--reading-width, 1200px);
  margin-inline: auto;
  overflow-wrap: anywhere;
}
.prose > p,
.prose > ul,
.prose > ol,
.prose > details {
  max-width: none;
}
.prose h2 {
  margin: 2.2em 0 0.8em;
  padding-top: 4px;
}
.prose h3 {
  margin: 1.6em 0 0.7em;
}
.prose li {
  margin: 7px 0;
}
.prose li::marker {
  color: var(--red);
}
.prose blockquote {
  margin: 26px 0;
  border-left: 3px solid var(--blue);
  background: var(--blue-tint);
  padding: 18px 24px;
  border-radius: 0 8px 8px 0;
}
.prose blockquote p:last-child {
  margin-bottom: 0;
}
.prose code, .rss-summary code {
  background: var(--code-bg);
  border-radius: 4px;
  padding: 2px 5px;
  font-size: 0.85em;
  color: var(--code-ink);
}
.prose pre {
  white-space: pre;
  overflow-x: auto;
  padding: 20px;
  border-radius: 10px;
  background: #282d2c;
  line-height: 1.6;
  font-size: 0.83rem;
}
.prose pre code {
  background: none;
  color: #f0eeea;
  padding: 0;
}
.table-scroll {
  overflow-x: auto;
  max-width: none;
  margin: 22px 0;
  border: 1px solid var(--line);
  border-radius: 10px;
}
.prose table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  margin: 0;
  background: var(--white);
  font-size: 0.85rem;
}
body[data-page="overview"][data-course-has-exam="true"] .prose th:first-child {
  width: 28.8%;
}
.prose th,
.prose td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  min-width: 100px;
}
.prose th {
  background: var(--sidebar-bg);
  font-size: 0.74rem;
}
.table-scroll td .tag { max-width: 100%; margin: 0 4px 4px 0; padding: 3px 6px; background: var(--hover); font-size: 0.75rem; line-height: 1.4; letter-spacing: 0; }
.table-scroll .official-sources { margin: 6px 0 0; padding-left: 18px; }
.prose details {
  border: 1px solid var(--line);
  background: var(--chrome-bg);
  border-radius: 8px;
  padding: 16px 20px;
  margin: 22px 0;
}
.prose details summary {
  cursor: pointer;
  font-weight: 650;
  color: var(--ink);
}
.prose details[open] summary {
  margin-bottom: 16px;
}
.diagram {
  display: block;
  width: 100%;
  padding: 0;
  background: #f7f8fc;
  border: 1px solid #dce1ec;
  border-radius: 18px;
  overflow: hidden;
  text-align: left;
  margin: 28px 0;
}
.diagram img {
  width: 100%;
  display: block;
}
.diagram > span {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  line-height: 1.5;
  background: var(--white);
  padding: 12px 20px;
  border-top: 1px solid #dce1ec;
  color: var(--muted);
  font-size: 0.68rem;
}
.diagram:hover {
  border-color: #bdafa0;
}
body[data-course="data-governance"] .diagram {
  background: #fff;
  border-color: #c2d4d4;
}
body[data-course="data-governance"] .diagram > span {
  border-top-color: #c2d4d4;
}
.page-navigation {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  border-top: 1px solid var(--line);
  margin-top: 48px;
  padding-top: 24px;
}
.lesson-main .page-navigation {
  margin-top: 24px;
}
.page-navigation a {
  display: flex;
  flex-direction: column;
  padding: 14px 18px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 0.86rem;
  text-decoration: none;
  color: var(--ink);
}
.page-navigation a:last-child {
  align-items: flex-end;
  text-align: right;
}
.page-navigation small {
  display: block;
  font-size: 0.55rem;
  letter-spacing: 1.6px;
  color: var(--muted);
  margin-bottom: 4px;
}
.page-navigation-title { display: inline-flex; align-items: center; gap: 8px; max-width: 100%; color: var(--ink); }
.page-navigation-arrow { display: grid; place-items: center; flex: 0 0 18px; width: 18px; height: 18px; padding: 0; background: transparent; color: var(--ink); line-height: 0; }
.page-navigation a:hover .page-navigation-arrow { color: var(--red); }
.site-footer {
  position: fixed;
  inset: auto 0 0;
  z-index: 25;
  background: var(--chrome-bg);
  box-shadow: 0 -4px 16px #25232106;
  border-top: 1px solid var(--line);
  padding: 12px 28px calc(12px + env(safe-area-inset-bottom));
  display: flex;
  justify-content: center;
  color: var(--muted);
  font-size: 0.78rem;
  text-align: center;
}
.site-footer > span { min-width: 0; white-space: nowrap; }
.site-footer a {
  color: var(--red-dark);
}
.footer-brand { color: var(--ink); }
.footer-heart {
  width: 1.25em;
  height: 1.25em;
  color: var(--red);
  vertical-align: -0.3em;
}
html[data-theme="dark"] .site-footer a {
  color: #ee5e4a;
}
.footer-separator {
  margin: 0 6px;
}
.site-footer a {
  text-decoration: none;
}
.site-footer a:hover {
  text-decoration: underline;
}
:is(.certiquiz-app, .certichat, .quiz-shell) { --surface: var(--hover); --accent: var(--red); --accent-hover: var(--red-dark); --success: #22684c; --success-bg: #eaf6ef; --warning: #8a5a00; --warning-bg: #fff7db; --error: #a52f2c; --error-bg: #fff0ef; }
html[data-theme="dark"] :is(.certiquiz-app, .certichat, .quiz-shell) { --success: #9bd8b8; --success-bg: #1b352b; --warning: #ffdc82; --warning-bg: #44330c; --error: #ffb0a8; --error-bg: #382322; }
:is(.certiquiz-app, .certichat) .notice { display: flex; align-items: flex-start; gap: 10px; border: 1px solid var(--line); padding: 14px 18px; border-radius: 9px; background: var(--surface); font-size: 14px; line-height: 1.45; margin-bottom: 18px; }
:is(.certiquiz-app, .certichat) .notice > svg { flex: 0 0 auto; width: 20px; height: 20px; margin-top: 1px; }
:is(.certiquiz-app, .certichat) .notice > span { flex: 1 1 auto; }
:is(.certiquiz-app, .certichat) .error { color: var(--error); background: var(--error-bg); border-color: var(--error); }
:is(.certiquiz-app, .certichat) .warning { color: var(--warning); background: var(--warning-bg); border-color: var(--warning); }
:is(.certiquiz-app, .certichat) .success { color: var(--success); background: var(--success-bg); border-color: var(--success); }
:is(.certiquiz-app, .certichat, .certisearch, #quiz) .confirmation { width: min(400px, calc(100vw - 32px)); max-height: calc(100dvh - 32px); margin: auto; padding: 0; border-width: 4px 0 0; border-radius: 16px; background: var(--paper); color: var(--ink); box-shadow: 0 20px 60px #0003; }
:is(.certiquiz-app, .certichat, .certisearch, #quiz) .confirmation-body { padding: 24px 24px 26px; text-align: center; }
:is(.certiquiz-app, .certichat, .certisearch, #quiz) .confirmation h2 { font-size: 22px; margin: 0 0 10px; }
:is(.certiquiz-app, .certichat, .certisearch, #quiz) .confirmation h2[tabindex="-1"]:focus { outline: none; }
:is(.certiquiz-app, .certichat, .certisearch, #quiz) .confirmation p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.5; }
:is(.certiquiz-app, .certichat, .certisearch, #quiz) .confirmation .notice { margin: 16px 0 0; text-align: left; }
:is(.certiquiz-app, .certichat, .certisearch, #quiz) .confirmation-actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); }
:is(.certiquiz-app, .certichat, .certisearch, #quiz) .confirmation-actions .button { min-height: 52px; border: 0; border-radius: 0; padding: 11px 12px; }
:is(.certiquiz-app, .certichat, .certisearch, #quiz) .confirmation-actions .button:focus-visible { outline-offset: -5px; }
dialog {
  width: min(1200px, 95vw);
  max-height: 94vh;
  border: 1px solid var(--line);
  border-top: 4px solid var(--red);
  border-radius: 12px;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
}
dialog::backdrop, .course-page::after {
  background: #18191f66;
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
}
dialog:not(#diagram-viewer) {
  opacity: 0;
  transform: translateY(8px) scale(.985);
  transition: opacity 220ms ease, transform 220ms ease;
  transition: opacity 220ms ease, transform 220ms ease, display 220ms allow-discrete, overlay 220ms allow-discrete;
}
dialog:not(#diagram-viewer)[open] { opacity: 1; transform: none; }
dialog:not(#diagram-viewer)::backdrop {
  opacity: 0;
  transition: opacity 220ms ease;
  transition: opacity 220ms ease, display 220ms allow-discrete, overlay 220ms allow-discrete;
}
dialog:not(#diagram-viewer)[open]::backdrop { opacity: 1; }
@starting-style {
  dialog:not(#diagram-viewer)[open] { opacity: 0; transform: translateY(8px) scale(.985); }
  dialog:not(#diagram-viewer)[open]::backdrop { opacity: 0; }
}
html:has(#language-transition[open]) { overflow: hidden; }
#language-transition { width: 1px; height: 1px; overflow: hidden; border: 0; border-radius: 0; outline: none; background: transparent; box-shadow: none; }
#language-transition[open], #language-transition[open]::backdrop { opacity: 1; transform: none; transition: none; }
@media (prefers-reduced-motion: no-preference) {
  dialog#language-transition, dialog#language-transition::backdrop { transition-duration: 450ms; }
}
@media (prefers-reduced-motion: reduce) {
  dialog:not(#diagram-viewer), dialog:not(#diagram-viewer)::backdrop { transition: none; }
}
.search-dialog {
  width: min(620px, calc(100vw - 24px));
  max-height: min(80dvh, 720px);
  padding: 0;
  overflow: hidden;
  background: var(--white);
}
.search-dialog[open] { display: flex; flex-direction: column; }
.search-heading {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 16px 0 22px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  flex: none;
}
.search-heading button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 31px;
  height: 31px;
  flex: none;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--paper);
  color: var(--ink);
}
.search-heading button svg { width: 17px; height: 17px; }
.search-heading button:hover { border-color: var(--red); color: var(--red); }
.search-heading input {
  flex: 1;
  min-width: 0;
  min-height: 64px;
  padding: 12px 0;
  border: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-size: 1rem;
}
.search-heading input:focus-visible { outline: 0; }
.search-heading input::-webkit-search-cancel-button { display: none; }
.search-results {
  list-style: none;
  padding: 0;
  margin: 0;
  overflow-y: auto;
  min-height: 0;
  overscroll-behavior: contain;
  scrollbar-color: var(--scrollbar) transparent;
}
.search-results [hidden] { display: none !important; }
.search-results li + li { border-top: 1px solid var(--line); }
.search-results a {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 68px;
  padding: 10px 20px;
  color: var(--ink);
  text-decoration: none;
}
.search-results a:hover, .search-results a:focus-visible { background: var(--hover); }
.search-results a:focus-visible { outline-offset: -3px; }
.search-results mark, .rss-items mark { background: #ffe066; color: #20232b; border-radius: 2px; }
.search-result-icon {
  display: grid;
  place-items: center;
  flex: none;
  width: 40px;
  height: 40px;
  border-radius: 7px;
  background: var(--accent);
  color: #fff;
}
.search-result-icon-topic { background: #565c70; }
.search-result-icon-rss { background:#b65a00; }
.search-result-icon-video { background: var(--video-accent); }
.search-result-copy { display: block; min-width: 0; }
.search-result-copy small,
.search-result-copy strong,
.search-result-description { display: block; }
.search-result-copy small { color: var(--muted); font-size: 0.72rem; line-height: 1.2; margin: 0 0 2px; }
.search-result-copy strong { font-size: 0.96rem; line-height: 1.25; }
.search-result-description { display: none; color: var(--muted); font-size: 0.84rem; line-height: 1.5; margin-top: 5px; }
.search-dialog.has-query .search-result-description { display: block; }
.search-empty { padding: 24px; color: var(--muted); }
.search-empty strong,
.search-empty span { display: block; }
.search-empty strong { color: var(--ink); margin-bottom: 4px; }
.dialog-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  background: var(--white);
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
}
.dialog-toolbar .diagram-heading {
  flex: 1;
  order: -1;
  min-width: 0;
}
.dialog-toolbar p {
  margin: 0;
  font-weight: 600;
  font-size: 0.88rem;
}
.dialog-toolbar #diagram-group { display: block; overflow: hidden; color: var(--red); font-size: .65rem; font-weight: 750; letter-spacing: 1px; line-height: 1.3; text-overflow: ellipsis; text-transform: uppercase; white-space: nowrap; }
.dialog-toolbar #diagram-group:empty { display: none; }
.dialog-toolbar #diagram-caption { overflow: hidden; color: var(--ink); font-size: 1rem; font-weight: 750; line-height: 1.3; text-overflow: ellipsis; white-space: nowrap; }
.dialog-toolbar button {
  border: 1px solid var(--line);
  border-radius: 6px;
  white-space: nowrap;
  background: var(--white);
  padding: 7px 12px;
  font-size: 0.8rem;
}
.dialog-toolbar [data-diagram-present] { display: inline-grid; place-items: center; width: 36px; height: 36px; padding: 7px; }
.dialog-toolbar [data-diagram-present][hidden] { display: none; }
.dialog-toolbar [data-diagram-menu] { display: none; }
.dialog-toolbar kbd {
  font-size: 0.65rem;
  background: var(--paper);
  padding: 2px 4px;
  margin-left: 5px;
}
.dialog-content {
  overflow: auto;
  max-height: 78vh;
  background: #000;
}
.dialog-content img {
  display: block;
  width: 100%;
  background: #000;
}
html:not([data-theme="dark"]) :is(.dialog-content, .dialog-content img) { background: #fff; }
#diagram-viewer::backdrop { animation: diagram-backdrop-in 300ms ease-out both; }
#diagram-viewer.is-closing::backdrop { animation: diagram-backdrop-out 300ms ease-in both; }
@keyframes diagram-backdrop-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes diagram-backdrop-out { from { opacity: 1; } to { opacity: 0; } }
.diagram-presentation-nav, .diagram-slide-count, .diagram-direction-controls { display: none; }
#diagram-viewer[open].is-presenting {
  width: 100vw;
  height: 100dvh;
  max-width: none;
  max-height: none;
  margin: 0;
  border-width: 4px 0 0;
  border-radius: 0;
  display: grid;
  --diagram-control-width: 98px;
  --diagram-control-height: 36px;
  --diagram-control-bottom: 20px;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: auto minmax(0, 1fr) auto;
  overflow: hidden;
}
#diagram-viewer.is-presenting .dialog-toolbar { grid-column: 1; grid-row: 1; }
#diagram-viewer.is-presenting .dialog-toolbar [data-diagram-menu] { display: inline-flex; align-items: center; justify-content: center; order: -2; width: 36px; height: 36px; padding: 7px; background: transparent; color: var(--ink); }
#diagram-viewer.is-presenting .dialog-toolbar [data-diagram-menu] svg { width: 18px; height: 18px; }
#diagram-viewer .dialog-toolbar button:hover, #diagram-viewer.is-presenting .dialog-toolbar [data-diagram-menu]:not([aria-expanded="true"]):hover { border-color: var(--red); color: var(--red); }
#diagram-viewer.is-presenting .diagram-presentation-nav {
  display: block;
  position: absolute;
  grid-column: 1;
  grid-row: 2 / -1;
  z-index: 2;
  top: 0;
  bottom: 0;
  left: 0;
  width: 220px;
  overflow-x: hidden;
  overflow-y: auto;
  padding: 12px;
  border-right: 1px solid var(--line);
  background: var(--sidebar-bg);
  box-shadow: 8px 0 24px var(--shadow);
  scrollbar-color: var(--scrollbar) transparent;
  scrollbar-width: thin;
  transform: translateX(-100%);
  opacity: 0;
  pointer-events: none;
  transition: transform 220ms ease, opacity 220ms ease;
}
#diagram-viewer.is-presenting .diagram-presentation-nav.is-open { transform: none; opacity: 1; pointer-events: auto; }
.diagram-presentation-group + .diagram-presentation-group { margin-top: 16px; }
.diagram-presentation-group h3 { margin: 0 0 8px; overflow: hidden; color: var(--red); font-size: .65rem; font-weight: 750; letter-spacing: 1px; line-height: 1.3; text-overflow: ellipsis; text-transform: uppercase; white-space: nowrap; }
.diagram-presentation-group h3 .nav-number { min-width: 0; margin-right: 6px; font: inherit; letter-spacing: inherit; opacity: 1; }
.diagram-presentation-nav button { display: block; position: relative; width: 100%; margin: 0 0 8px; padding: 5px; border: 1px solid var(--line); border-radius: 7px; background: var(--paper); color: var(--ink); text-align: left; cursor: pointer; }
.diagram-presentation-nav button::after { content: attr(data-slide-number); display: grid; place-items: center; position: absolute; right: 10px; bottom: 10px; width: 20px; height: 20px; border-radius: 4px; background: #111; color: #fff; font-size: .65rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.diagram-presentation-nav button[aria-current="true"] { border: 2px solid var(--accent); }
.diagram-presentation-nav img { display: block; width: 100%; aspect-ratio: 16 / 9; object-fit: contain; }
#diagram-viewer.is-presenting .dialog-content { grid-column: 1; grid-row: 2; display: grid; grid-template-rows: minmax(0, 1fr); place-items: center; min-width: 0; min-height: 0; max-height: none; overflow: hidden; padding: 0; cursor: pointer; }
#diagram-viewer.is-presenting::after { content: ""; grid-column: 1; grid-row: 2 / -1; z-index: 1; background: #18191f66; opacity: 0; pointer-events: none; transition: opacity 220ms ease; }
/* Blur the stable content layers; sampling the animated SVG through a backdrop can leave a rectangular seam. */
#diagram-viewer.is-presenting:has(.diagram-presentation-nav.is-open) :is(.dialog-content, #diagram-description) { filter: blur(3px); }
#diagram-viewer.is-presenting:has(.diagram-presentation-nav.is-open) :is(.dialog-content, .dialog-content img) { background: var(--diagram-paper, var(--paper)); }
#diagram-viewer.is-presenting:has(.diagram-presentation-nav.is-open)::after { opacity: 1; pointer-events: auto; }
#diagram-viewer.is-presenting .dialog-content img { width: 100%; height: 100%; min-width: 0; min-height: 0; object-fit: contain; }
#diagram-viewer.is-presenting #diagram-description { grid-column: 1; grid-row: 3; max-height: 22dvh; overflow-y: auto; }
#diagram-viewer.is-presenting .diagram-slide-count { display: grid; place-items: center; grid-column: 1; grid-row: 2; justify-self: end; align-self: end; position: relative; margin: 0 20px var(--diagram-control-bottom) 0; width: var(--diagram-control-width); height: var(--diagram-control-height); border: 1px solid #111; border-radius: 6px; background: #111; color: #fff; font-size: 1.1rem; font-weight: 700; font-variant-numeric: tabular-nums; opacity: 0; visibility: hidden; transition: opacity 250ms, visibility 250ms; pointer-events: none; }
#diagram-viewer.is-presenting .diagram-slide-count.is-visible { opacity: 1; visibility: visible; }
#diagram-viewer.is-presenting .diagram-direction-controls { display: flex; grid-column: 1; grid-row: 2; justify-self: start; align-self: end; position: relative; margin: 0 0 var(--diagram-control-bottom) 20px; width: var(--diagram-control-width); height: var(--diagram-control-height); padding: 3px; border: 1px solid #111; border-radius: 6px; background: #111; opacity: 1; visibility: visible; transition: opacity 250ms, visibility 250ms; }
#diagram-viewer[data-case-presentation] .diagram-direction-controls { display: none; }
#diagram-viewer.is-presenting[data-slide-direction] .diagram-direction-controls, #diagram-viewer.is-presenting .diagram-direction-controls:is(:hover, :has(button:focus-visible)) { opacity: 1; visibility: visible; pointer-events: auto; }
#diagram-viewer.is-presenting .diagram-direction-controls button { display: grid; place-items: center; flex: 1; min-width: 0; padding: 0; border: 0; border-radius: 3px; background: transparent; color: #fff; cursor: pointer; }
#diagram-viewer.is-presenting[data-slide-direction="-1"] [data-slide-step="-1"], #diagram-viewer.is-presenting[data-slide-direction="1"] [data-slide-step="1"], #diagram-viewer.is-presenting .diagram-direction-controls button:focus-visible { background: #fff; color: #111; }
/* Mouse controls follow the image area; keep keyboard focus and touch navigation available. */
@media (hover: hover) and (pointer: fine) {
  #diagram-viewer.is-presenting .diagram-direction-controls { opacity: 0; pointer-events: none; }
}

@media (max-width: 700px) { .dialog-toolbar #diagram-caption { font-size: .85rem; } }
html.is-resizing :is(.course-page, .site-header, .home-main, .hero-ambient, .course-groups, .sidebar, .course-main, .site-footer) { transition: none !important; }
html.is-chat-layout-transition :is(.course-page, .site-header, .sidebar, .course-main) { transition: none !important; }
html.is-chat-layout-transition::view-transition { pointer-events: none; }
/* Named snapshots leave normal stacking contexts; keep fixed chrome above the moving content. */
html.is-chat-layout-transition:not(:has(#diagram-viewer.is-presenting)) .site-header, html.is-chat-layout-transition #diagram-viewer.is-presenting .dialog-toolbar { view-transition-name: course-header; }
html.is-chat-layout-transition:not(:has(#diagram-viewer.is-presenting)) .site-footer, html.is-chat-layout-transition #diagram-viewer.is-presenting #diagram-description { view-transition-name: course-footer; }
html.is-chat-layout-transition #diagram-viewer.is-presenting .certichat-panel { view-transition-name: course-chat-panel; }
::view-transition-group(course-header), ::view-transition-group(course-footer) { z-index: 1; }
::view-transition-group(course-chat-panel) { z-index: 2; }
::view-transition-old(course-chat-panel):only-child { animation: certichat-panel-out 360ms cubic-bezier(.22, 1, .36, 1) both; }
@keyframes certichat-panel-out { to { transform: translateX(100%); opacity: 0; } }
::view-transition-group(course-reading), ::view-transition-group(course-diagram), ::view-transition-group(course-chat-launcher), ::view-transition-group(course-chat-panel), ::view-transition-group(course-header), ::view-transition-group(course-footer) { animation-duration: 360ms; animation-timing-function: ease; }
@media (prefers-reduced-motion: reduce) {
  #diagram-viewer::backdrop { animation: none; }
  .diagram-slide-count, .diagram-direction-controls, .diagram-presentation-nav, #diagram-viewer::after { transition: none !important; }
  .site-header, .home-main, .course-groups, .sidebar, .course-main, .course-page .site-footer, .course-page::after { transition: none !important; }
  .course-groups details::details-content, .nav-branch::details-content { transition: none !important; }
}
#diagram-viewer[open][aria-describedby] {
  transform-origin: top left;
  display: flex;
  flex-direction: column;
}
#diagram-viewer[open][aria-describedby].is-presenting { display: grid; }
#diagram-viewer[aria-describedby] .dialog-toolbar {
  flex-shrink: 0;
}
#diagram-description {
  flex-shrink: 0;
  margin: 0;
  padding: 12px 20px;
  border-top: 1px solid var(--line);
  background: var(--white);
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.5;
}
body:has(dialog[open]) {
  overflow: hidden;
}
.noscript-note {
  padding: 12px 24px;
  background: #fff4d6;
  color: #483913;
  font-size: 0.85rem;
  text-align: center;
}
.quiz-shell {
  padding: 30px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 16px;
  margin: 0 0 24px;
}
.quiz-intro {
  border-top: 4px solid var(--red);
  border-radius: 16px;
}
.quiz-heading {
  min-width: 0;
  margin-bottom: 12px;
}
.quiz-heading .eyebrow {
  color: var(--red);
  font-size: 11px;
  letter-spacing: .16em;
}
.quiz-heading h2 {
  margin: 0;
  padding: 0;
  font-size: 24px;
  line-height: 1.25;
  letter-spacing: -.025em;
}
html[data-theme="dark"] .quiz-heading .eyebrow {
  color: var(--note);
}
.quiz-start-action {
  display: flex;
  justify-content: flex-end;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
.quiz-start-action [data-start] {
  display: flex;
  width: 140px;
  max-width: 100%;
}
.quiz-summary-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  flex-wrap: wrap-reverse;
  gap: 12px 16px;
}
.quiz-summary-header .quiz-heading {
  flex: 1 1 220px;
}
.quiz-summary-header .quiz-meta-actions {
  flex-shrink: 0;
  margin-left: auto;
}
.quiz-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 24px 0;
}
.quiz-facts > div {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
}
.quiz-facts strong {
  display: block;
  font-size: 1.8rem;
  line-height: 1.3;
}
.quiz-facts span {
  color: var(--muted);
  font-size: 0.75rem;
}
.quiz-actions {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 24px;
}
.quiz-actions .button {
  font-size: 0.85rem;
}
.quiz-meta {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  font-size: 0.88rem;
  color: var(--muted);
  gap: 16px;
  margin-bottom: 15px;
}
.quiz-meta-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}
.quiz-reset,
.quiz-close {
  display: inline-grid;
  place-items: center;
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  color: var(--ink);
}
.quiz-reset:hover,
.quiz-close:hover {
  background: var(--surface);
}
.quiz-reset svg,
.quiz-close svg {
  width: 19px;
  height: 19px;
}
.quiz-meter {
  height: 7px;
  margin: 0 0 24px;
  appearance: none;
  background: var(--surface);
  accent-color: var(--red);
}
.quiz-meter::-webkit-progress-bar {
  background: var(--surface);
}
.quiz-meter::-webkit-progress-value {
  background: var(--red);
}
.quiz-meter::-moz-progress-bar {
  background: var(--red);
}
.quiz-question {
  font-size: clamp(18px, 2.1vw, 24px);
  letter-spacing: -0.025em;
  line-height: 1.3;
  font-weight: 700;
  margin: 0 0 22px;
}
.quiz-question::before { content: attr(data-question-number); }
.quiz-options {
  border: 0;
  margin: 0;
  padding: 0;
  min-width: 0;
}
.quiz-options legend {
  padding: 0;
  margin-bottom: 28px;
  width: 100%;
}
.quiz-option {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 76px;
  margin: 0 0 12px;
  border: 2px solid var(--line);
  border-radius: 11px;
  padding: 16px 18px;
  cursor: pointer;
  line-height: 1.5;
  font-size: 1rem;
  font-weight: 500;
}
.quiz-option:hover:has(input:enabled) {
  background: var(--surface);
}
.quiz-option:not(.is-correct):not(.is-wrong):has(input:checked) {
  border-color: var(--red);
  background: var(--tint);
}
.quiz-option:has(input:focus-visible) {
  outline: 3px solid var(--red);
  outline-offset: 3px;
}
.quiz-option input {
  margin: 0;
  accent-color: var(--red);
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}
.quiz-option > span:last-child { min-width: 0; overflow-wrap: anywhere; }
.quiz-option.is-correct {
  background: var(--success-bg);
  border-color: var(--success);
}
.quiz-option.is-wrong {
  background: var(--tint);
  border-color: var(--red);
  border-style: dashed;
}
.quiz-option .option-letter {
  display: inline-grid;
  place-items: center;
  flex: 0 0 30px;
  width: 30px;
  height: 30px;
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  font-size: 0.88rem;
  font-weight: 800;
}
.quiz-option.is-correct .option-letter {
  background: var(--success);
  color: var(--paper);
}
.quiz-option.is-wrong .option-letter {
  background: var(--red);
  color: var(--on-red);
}
.quiz-option:has(input:disabled) {
  cursor: default;
}
.feedback {
  border-left: 3px solid var(--red);
  margin-top: 25px;
  padding: 16px 20px;
  background: var(--surface);
}
.feedback h2 {
  margin: 0 0 6px !important;
  font-size: 1rem;
}
.feedback p { margin: 0; }
.quiz-next-action { justify-content: space-between; border-top: 1px solid var(--line); padding-top: 20px; }
.quiz-next-controls { display: flex; align-items: center; gap: 12px; margin-left: auto; }
.prose .quiz-results {
  width: 100%;
  min-width: 0;
  table-layout: fixed;
  border-collapse: separate;
  border-spacing: 0;
  font-variant-numeric: tabular-nums;
}
.quiz-results th {
  padding: 12px 10px;
  background: var(--paper);
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .07em;
}
.quiz-results td {
  padding: 4px 10px;
  vertical-align: middle;
}
.quiz-results th:first-child { width: 130px; }
.quiz-results .text-link {
  display: block;
  width: 100%;
  text-align: left;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-weight: 400;
}
.quiz-results .text-link {
  border: 0;
  padding: 0;
  min-height: 44px;
  background: transparent;
  color: var(--ink);
}
.quiz-results .text-link:focus-visible { outline-offset: 1px; }
.quiz-results .text-link:hover { text-decoration: underline; }
.quiz-result-status {
  display: inline-block;
  border-radius: 6px;
  padding: 4px 8px;
  font-size: 0.75rem;
  background: var(--surface);
  color: var(--muted);
}
.quiz-result-status.is-correct { background: var(--success-bg); color: var(--success); }
.quiz-result-status.is-wrong { background: var(--error-bg); color: var(--error); }
.quiz-notice {
  color: var(--muted);
  font-size: 0.74rem;
  margin-top: 18px;
}
.quiz-score {
  display: flex;
  align-items: center;
  gap: 28px;
  margin: 22px 0;
}
.score-number {
  font-size: 3.2rem;
  font-weight: 650;
  letter-spacing: -0.04em;
  color: var(--ink);
  line-height: 1;
}
.score-number small {
  font-size: 1.3rem;
  color: var(--muted);
}
.domain-results {
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.domain-results li {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px;
  font-size: 0.8rem;
  margin: 0;
}
.domain-results strong {
  color: var(--ink);
  white-space: nowrap;
}
.quiz-error {
  padding: 20px;
  border: 1px solid var(--red);
  border-radius: 8px;
  color: var(--red);
}
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}
.callout {
  border: 1px solid var(--line);
  padding: 20px;
  border-radius: 10px;
  background: var(--white);
}
@media (max-width: 1100px) {
  :root {
    --sidebar-width: 240px;
    --content-gutter: 32px;
  }
  .home-main {
    padding: 0 32px;
  }
  .course-main {
    padding: 20px 32px 50px;
  }
  .sidebar {
    padding: 22px 12px 0;
  }
  .sidebar > nav {
    margin-right: -12px;
    padding-right: 12px;
  }
}
.course-groups.is-compact-groups .path-nav {
    display: none;
}
.course-groups.is-compact-groups .path-nav-mobile {
    display: block;
}
.course-groups.is-compact-groups { display: block; height: auto; min-height: var(--section-nav-height); padding: 0; interpolate-size: allow-keywords; }
.course-groups.is-compact-groups details::details-content,
.nav-branch::details-content {
    block-size: 0;
    content-visibility: hidden;
    overflow: clip;
    transition: block-size 240ms ease, content-visibility 240ms allow-discrete;
}
.course-groups.is-compact-groups details[open]::details-content,
.nav-branch[open]::details-content { block-size: auto; content-visibility: visible; }
.course-groups.is-compact-groups .course-breadcrumb { position: relative; z-index: 1; height: calc(var(--section-nav-height) - 5px); padding: 0 24px 3px; pointer-events: none; }
.course-groups.is-compact-groups .course-breadcrumb a { pointer-events: auto; }
.course-groups.is-compact-groups > .path-nav-mobile { margin: 0; }
.course-groups.is-compact-groups > .path-nav-mobile > summary {
    position: absolute;
    inset: 0 0 auto;
    width: 100%;
    padding: 0 10px 3px;
    justify-content: flex-end;
    border: 0;
    border-radius: 0;
    background: transparent;
}
@media (min-width: 801px) and (max-width: 1200px) {
  .course-main { padding-right: 5vw; }
}
@media (min-width: 801px) and (max-width: 1100px) {
  .course-main { padding-right: 32px; }
}
@media (min-width: 801px) and (max-width: 1023px) {
  .site-header .search-toggle { width: 44px; min-width: 44px; justify-content: center; }
  .site-header .search-toggle span, .site-header .search-toggle kbd { display: none; }
}
@media (max-width: 800px) {
  :root {
    --header: 68px;
    --chat-launcher-size: 44px;
    --content-gutter: 24px;
  }
  .site-header {
    padding: 0 var(--content-gutter);
    gap: 14px;
  }
  .course-page .site-header .brand > span { display: none; }
  /* Reserve all eleven course controls, including the RSS entry, before distributing gaps. */
  .course-page .site-header {
    --header-controls-width: 484px;
    padding-inline: clamp(5px, calc((100vw - var(--header-controls-width)) / 2), var(--content-gutter));
    gap: clamp(0px, calc((100vw - var(--header-controls-width) - 2 * var(--content-gutter)) / 9), 14px);
  }
  .search-toggle { justify-content: center; }
  .menu-toggle, .path-nav-mobile > summary, .header-app-link, .search-toggle, .theme-toggle, .language-toggle {
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
    padding: 4px;
  }
  .search-toggle span, .search-toggle kbd { display: none; }
  .sidebar {
    transform: translateX(-100%);
    width: min(310px, 88vw);
    box-shadow: 12px 0 40px #2523211c;
    visibility: hidden;
    transition:
      transform 0.18s,
      visibility 0.18s;
  }
  .sidebar.is-open {
    transform: translateX(0);
    visibility: visible;
  }
  /* ponytail: backdrop clicks reach the existing document handler that closes the menu. */
  .course-page::after {
    content: "";
    position: fixed;
    inset: var(--header) 0 var(--footer-height);
    z-index: 19;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 180ms ease, visibility 180ms;
  }
  .course-page:has(.sidebar.is-open)::after {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }
  .course-main {
    margin-inline: 0;
    max-width: none;
    padding: 20px var(--content-gutter);
  }
  .home-main {
    padding: 0 24px;
  }
  .certitips-page { --course-groups-height: 0px; }
  .certitips-page .home-main { padding: 0; }
  .certitips-page .course-groups { display: none; }
  .certitips-page .path-carousel { padding-bottom: 0; }
  .certitips-page .path-section { height: calc(100dvh - var(--header) - var(--footer-height)); max-height: none; padding: 20px var(--content-gutter) 0; border: 0; border-radius: 0; box-shadow: none; }
  .certitips-page .certification-list { margin-right: calc(-1 * var(--content-gutter)); padding-right: var(--content-gutter); padding-bottom: calc(2 * var(--layout-gap) + var(--chat-launcher-size)); }
  body:has(.search-dialog[open]) { overflow: hidden; }
  .search-dialog {
    position: fixed;
    inset: 0;
    width: 100%;
    max-width: none;
    height: 100dvh;
    max-height: none;
    margin: 0;
    padding-bottom: env(safe-area-inset-bottom);
    border: 0;
    border-radius: 0;
  }
  .search-heading { align-items: flex-start; padding: max(12px, env(safe-area-inset-top)) 16px 8px; }
  .search-heading > svg { flex: none; margin-top: 5px; }
  .search-heading input { min-height: 31px; padding: 4px 0; }
  .search-results { flex: 1; }
  .course-groups { left: 24px; width: calc(100% - 48px); }
  .home-hero {
    grid-template-columns: 1fr;
    padding: 20px 0;
    padding-bottom: calc(var(--chat-launcher-size) + 2 * var(--layout-gap));
  }
  .home-hero .hero-copy { grid-column: 1; }
  .hero-ambient { grid-column: 1; margin: -20px calc(-1 * var(--content-gutter)) calc(-1 * (var(--chat-launcher-size) + 2 * var(--layout-gap))); }
  .hero-flow { display: none; }
  .home-hero h1 {
    font-size: clamp(2.6rem, 8vw, 3.6rem);
  }
  .certification-item {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .certification-actions {
    align-items: flex-start;
    text-align: left;
  }
  .site-footer {
    padding: 10px 20px calc(10px + env(safe-area-inset-bottom));
  }
  .footer-credit { display: none; }
  .page-heading h1 {
    font-size: 2.1rem;
  }
  .page-lead {
    font-size: 1rem;
  }
  .prose {
    font-size: 0.97rem;
  }
  .dialog-toolbar p {
    font-size: 0.76rem;
  }
  .quiz-shell {
    padding: 20px;
  }
  .quiz-question {
    font-size: 1.14rem;
  }
}
@media (max-width: 800px) {
  .site-header > .brand img { width: 44px; height: 44px; }
  #diagram-viewer.is-presenting .dialog-toolbar { padding: 8px 12px; gap: 8px; }
  #diagram-viewer.is-presenting .dialog-toolbar [data-diagram-present],
  #diagram-viewer.is-presenting .dialog-toolbar kbd { display: none; }
  #diagram-viewer.is-presenting #diagram-description { padding: 8px 12px; }
}
@media (max-width: 480px) {
  .site-header > .brand img { width: 31px; height: 31px; }
  #diagram-viewer.is-presenting .dialog-toolbar [data-diagram-menu] { width: 31px; height: 31px; padding: 6px; }
  :root { --chat-launcher-size: 31px; --content-gutter: 20px; }
  .certitips-page .certification-list { margin-right: -18px; padding-right: 18px; }
  .course-groups.is-compact-groups > .path-nav-mobile > summary { padding-right: 6px; }
  .home-main {
    padding: 0 20px;
  }
  .home-hero h1 {
    font-size: 2.5rem;
  }
  .brand small {
    display: none;
  }
  .brand > span { display: none; }
  .site-header {
    gap: clamp(0px, calc((100vw - 319px) / 8), 9px);
  }
  .course-page .site-header {
    --header-controls-width: 341px;
    gap: clamp(0px, calc((100vw - var(--header-controls-width) - 2 * var(--content-gutter)) / 9), 5px);
  }
  .course-groups { left: 20px; width: calc(100% - 40px); }
  .menu-toggle, .path-nav-mobile > summary, .header-app-link, .search-toggle, .theme-toggle, .language-toggle, .group-carousel-controls button {
    width: 31px;
    height: 31px;
    min-width: 31px;
    min-height: 31px;
  }
  .menu-toggle svg, .path-nav-mobile > summary svg, .header-app-link svg, .search-toggle svg, .theme-toggle svg, .language-toggle svg, .group-carousel-controls button svg {
    width: 17px;
    height: 17px;
  }
  .path-section {
    padding: 24px 18px 28px;
  }
  .path-transition {
    padding: 20px;
  }
  .course-main {
    padding: 20px var(--content-gutter);
  }
  .page-heading h1 {
    font-size: 1.9rem;
  }
  .eyebrow {
    font-size: 0.59rem;
    letter-spacing: 1.1px;
    flex-wrap: wrap;
  }
  .page-navigation {
    gap: 10px;
  }
  .page-navigation a {
    padding: 12px;
    font-size: 0.76rem;
  }
  .quiz-shell {
    padding: 16px;
  }
  .quiz-facts {
    gap: 8px;
  }
  .quiz-facts > div {
    padding: 12px;
  }
  .quiz-facts strong {
    font-size: 1.4rem;
  }
  .quiz-facts span {
    font-size: 0.65rem;
  }
  .quiz-meta {
    flex-wrap: wrap;
  }
  .quiz-meta-actions {
    margin-left: auto;
  }
  .quiz-results th:first-child { width: 100px; }
  .quiz-results th { padding: 12px 6px; }
  .quiz-results td { padding: 4px 6px; }
  .quiz-option {
    padding: 12px;
    font-size: 0.88rem;
    gap: 10px;
  }
  .domain-results {
    grid-template-columns: 1fr;
  }
  .quiz-score {
    gap: 18px;
  }
  .score-number {
    font-size: 2.8rem;
  }
  .quiz-actions:not(.quiz-next-action) {
    align-items: stretch;
    flex-direction: column;
  }
}
@media (max-width: 360px) {
  .brand > span { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    transition: none !important;
    animation: none !important;
  }
  .hero-ambient::before { animation: none; }
}
@media print {
  .site-header,
  .course-groups,
  .sidebar,
  .site-footer,
  .complete-button,
  .page-navigation,
  .diagram > span,
  .quiz-actions,
  .menu-toggle {
    display: none !important;
  }
  .course-main,
  .home-main {
    margin: 0;
    padding: 0;
    max-width: none;
  }
  .prose {
    max-width: none;
  }
  .diagram {
    break-inside: avoid;
  }
  .prose details {
    display: block;
  }
  .prose pre {
    white-space: pre-wrap;
    color: black;
    background: #eee;
  }
  a {
    color: inherit;
  }
  .page-heading h1 {
    font-size: 26pt;
  }
  h2 {
    break-after: avoid;
  }
  .prose {
    font-size: 11pt;
  }
  body {
    background: white;
    padding-bottom: 0;
  }
}

.language-menu { position: relative; flex-shrink: 0; }
.language-toggle { list-style: none; cursor: pointer; }
.language-toggle::-webkit-details-marker { display: none; }
.language-panel { width: 160px; max-width: calc(100vw - 24px); }
.language-panel a[aria-current="true"] { color: var(--on-red); background: var(--red); }
/* Keep every app reachable at the standard control size on narrow headers. */
@media (max-width: 800px) {
  .site-header { --header-controls-width:440px; padding-inline:clamp(5px,calc((100vw - var(--header-controls-width)) / 2),var(--content-gutter)); gap:clamp(0px,calc((100vw - var(--header-controls-width) - 2 * var(--content-gutter)) / 9),14px); }
  .course-page .site-header { --header-controls-width:484px; gap:clamp(0px,calc((100vw - var(--header-controls-width) - 2 * var(--content-gutter)) / 10),14px); }
}
@media (max-width: 760px) { .site-header .brand > span { display:none; } }
@media (max-width: 480px) {
  .site-header { --header-controls-width:310px; }
  .course-page .site-header { --header-controls-width:341px; }
}
@media (min-width:481px) and (max-width:493px), (max-width:350px) {
  .course-page { --header:116px; }
  .course-page .site-header { display:grid; grid-template-columns:repeat(6,44px); grid-template-rows:repeat(2,44px); justify-content:space-between; align-content:center; gap:6px 0; padding-inline:var(--content-gutter); }
  .course-page .site-header > .brand { grid-row:1 / 3; }
  .course-page .site-header > .header-app-link[aria-label="CertiSearch"] { grid-column:2; }
}
@media(max-width:350px) {
  .course-page { --header:88px; }
  .course-page .site-header { grid-template-columns:repeat(6,31px); grid-template-rows:repeat(2,31px); }
}

/* Shared full-page loading and error presentation. */
.home-page .home-main:has(> .status-page) { width: 100%; max-width: none; margin: 0; padding: 0; }
.status-page .loading-full, .certiquiz-app .loading-full { width: 100%; min-height: calc(100dvh - var(--header) - var(--footer-height)); margin: 0; padding: 32px 24px; border: 0; border-radius: 0; background: transparent; box-shadow: none; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; }
.status-page .loading-full h1, .certiquiz-app .loading-full h1 { display: flex; align-items: center; justify-content: center; gap: 18px; font-size: clamp(28px, 4vw, 44px); }
.status-page .loading-full h1 svg, .certiquiz-app .loading-full h1 svg { width: 46px; height: 46px; flex: 0 0 auto; color: var(--ink); animation: certiquiz-rocket-float 3s ease-in-out infinite; }
.status-page .loading-error .hint, .certiquiz-app .loading-error .hint { margin-bottom: 0; }
.graph-pilot-retry-hint kbd, .status-page kbd, .certiquiz-app kbd { display: inline-flex; align-items: center; padding: 2px 5px; border: 1px solid var(--line); border-radius: 4px; background: var(--chrome-bg); color: var(--muted); font-size: 0.62rem; white-space: nowrap; }
@keyframes certiquiz-rocket-float { 0%, 100% { transform: translate(0, 0); } 50% { transform: translate(2px, -3px); } }
.status-page .loading-full h1 { line-height: 1.08; letter-spacing: -.045em; margin: 14px 0 20px; }
.status-page p { color: var(--muted); overflow-wrap: anywhere; }
.status-page .hint { font-size: 13px; margin-top: 7px; }
@media (prefers-reduced-motion: reduce) { .status-page .loading-full h1 svg { animation: none; } }

/* Barra de metadatos compartida por Cognee y CertiRSS. */
.chat-graph-footer { flex-shrink: 0; min-height: 46px; display: flex; border-top: 1px solid var(--line); background: var(--white); container-type: inline-size; }
.chat-graph-meta { display: grid; grid-template-columns: repeat(4, max-content); justify-content: start; width: 100%; color: var(--muted); font-size: 12px; line-height: 1.5; margin: 0; }
.chat-graph-meta > div { display: flex; min-height: 23px; }
.chat-graph-meta > div + div, .chat-graph-meta dd { border-left: 1px solid var(--line); }
.chat-graph-meta > div:nth-child(2) { border-right: 1px solid var(--line); }
.chat-graph-meta dt, .chat-graph-meta dd { display: flex; align-items: center; padding: 2px 8px; margin: 0; }
.chat-graph-meta dd { flex: 1; justify-content: flex-end; color: var(--ink); white-space: nowrap; }
@container (max-width: 660px) { .chat-graph-meta { grid-template-columns: 1fr 1fr; } .chat-graph-stamp { justify-self: stretch; } }
@container (max-width: 430px) { .chat-graph-meta { grid-template-columns: 1fr; } }

@media (max-width: 800px) {
  .site-header > .header-app-link:is([aria-label="CertiSearch"], [aria-label="CertiChat"]) { display: none; }
}

@media (max-width: 800px) { .site-header .language-panel { position: fixed; top: calc(var(--header) + 8px); right: 12px; left: auto; } }

@media (max-width: 800px) {
  :is([data-page="courses"], [data-page="certiquiz"]) > #main { border-top: 4px solid var(--red); }
}