:root {
  --ink: #102a23;
  --ink-2: #173e34;
  --ink-3: #1d4a3e;
  --paper: #f3efe5;
  --paper-deep: #e8e1d2;
  --surface: #fffdf8;
  --surface-2: #f9f5eb;
  --orange: #f05a28;
  --orange-deep: #c94316;
  --blue: #2f64d6;
  --teal: #0d7c74;
  --lime: #d7ff69;
  --text: #17251f;
  --muted: #65706a;
  --muted-light: #8a938e;
  --line: rgba(16, 42, 35, 0.14);
  --line-strong: rgba(16, 42, 35, 0.28);
  --white-line: rgba(255, 255, 255, 0.16);
  --white-muted: rgba(255, 255, 255, 0.68);
  --sans: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", "Noto Sans SC", "Segoe UI", sans-serif;
  --mono: "Bahnschrift", "DIN Alternate", "Cascadia Mono", Consolas, monospace;
  --max-width: 1280px;
  --header-height: 72px;
  --radius: 8px;
  --shadow-soft: 0 16px 40px rgba(16, 42, 35, 0.08);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 24px);
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--text);
  background-color: var(--paper);
  background-image:
    linear-gradient(rgba(16, 42, 35, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 42, 35, 0.025) 1px, transparent 1px);
  background-size: 32px 32px;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.nav-open {
  overflow: hidden;
}

::selection {
  color: var(--ink);
  background: var(--lime);
}

img,
svg {
  display: block;
}

img {
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input {
  color: inherit;
  font: inherit;
}

button {
  cursor: pointer;
}

button,
input,
a {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
input:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(240, 90, 40, 0.58);
  outline-offset: 3px;
}

h1,
h2,
h3,
p,
figure {
  margin-top: 0;
}

.container {
  width: min(var(--max-width), calc(100% - 64px));
  margin-inline: auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  padding: 10px 16px;
  color: var(--surface);
  background: var(--ink);
  border-radius: 4px;
  transform: translateY(-150%);
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.icon {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}

[data-icon] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  min-height: var(--header-height);
  background: rgba(243, 239, 229, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.header-inner {
  display: flex;
  min-height: var(--header-height);
  align-items: center;
  gap: 24px;
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  color: var(--lime);
  background: var(--ink);
  border: 1px solid var(--ink);
  border-radius: 6px;
}

.brand-mark svg {
  width: 23px;
  height: 23px;
  stroke: currentColor;
  stroke-width: 1.45;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  line-height: 1.15;
}

.brand-copy strong {
  font-size: 18px;
  font-weight: 750;
}

.brand-copy small {
  margin-top: 4px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 500;
}

.site-nav {
  display: flex;
  align-items: stretch;
  align-self: stretch;
  gap: 6px;
  margin-left: auto;
}

.site-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0 13px;
  color: #45534d;
  font-size: 13px;
  font-weight: 650;
  white-space: nowrap;
  transition: color 160ms ease, background-color 160ms ease;
}

.site-nav a::after {
  position: absolute;
  right: 13px;
  bottom: -1px;
  left: 13px;
  height: 2px;
  background: var(--orange);
  content: "";
  opacity: 0;
  transform: scaleX(0.45);
  transition: opacity 160ms ease, transform 160ms ease;
}

.site-nav a:hover,
.site-nav a.is-current {
  color: var(--ink);
}

.site-nav a:hover::after,
.site-nav a.is-current::after {
  opacity: 1;
  transform: scaleX(1);
}

.header-status {
  display: inline-flex;
  min-height: 32px;
  align-items: center;
  gap: 8px;
  padding: 5px 10px;
  color: var(--ink-2);
  background: rgba(255, 253, 248, 0.62);
  border: 1px solid var(--line);
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 10px;
  white-space: nowrap;
}

.status-dot {
  position: relative;
  width: 7px;
  height: 7px;
  background: #20a66a;
  border-radius: 50%;
}

.status-dot::after {
  position: absolute;
  inset: -3px;
  border: 1px solid rgba(32, 166, 106, 0.32);
  border-radius: 50%;
  content: "";
  animation: statusPulse 2.2s ease-out infinite;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  padding: 0;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 5px;
}

.nav-toggle .icon {
  width: 21px;
  height: 21px;
}

@keyframes statusPulse {
  0% { opacity: 0.8; transform: scale(0.8); }
  70% { opacity: 0; transform: scale(1.6); }
  100% { opacity: 0; transform: scale(1.6); }
}

.hero {
  position: relative;
  overflow: hidden;
  color: var(--surface);
  background: var(--ink);
}

.hero::before {
  position: absolute;
  top: 0;
  left: 58%;
  width: 1px;
  height: 100%;
  background: var(--white-line);
  content: "";
}

.hero::after {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 28%;
  height: 8px;
  background: var(--orange);
  content: "";
}

.hero-grid-lines {
  position: absolute;
  inset: 0;
  opacity: 0.62;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
}

.hero-layout {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: 620px;
  grid-template-columns: minmax(0, 1.06fr) minmax(380px, 0.94fr);
  align-items: center;
  gap: 70px;
  padding-block: 68px 76px;
}

.hero-copy {
  position: relative;
  z-index: 2;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
  color: var(--orange);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 650;
}

.eyebrow span + span {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.eyebrow span + span::before {
  width: 28px;
  height: 1px;
  background: currentColor;
  content: "";
  opacity: 0.52;
}

.eyebrow-light {
  color: #ff9c78;
}

.hero h1 {
  max-width: 780px;
  margin-bottom: 26px;
  color: #fffdf8;
  font-size: 74px;
  font-weight: 760;
  line-height: 1.02;
}

.hero h1 span {
  color: #cfdbc9;
}

.hero-intro {
  max-width: 620px;
  margin-bottom: 30px;
  color: var(--white-muted);
  font-size: 17px;
  line-height: 1.8;
}

.hero-search {
  display: grid;
  width: min(100%, 650px);
  min-height: 58px;
  grid-template-columns: auto minmax(0, 1fr) auto 42px;
  align-items: center;
  gap: 12px;
  padding: 7px 8px 7px 17px;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid transparent;
  border-radius: 6px;
  box-shadow: 0 18px 35px rgba(0, 0, 0, 0.16);
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.hero-search:focus-within {
  border-color: var(--orange);
  box-shadow: 0 0 0 3px rgba(240, 90, 40, 0.18), 0 18px 35px rgba(0, 0, 0, 0.16);
}

.search-icon {
  color: var(--muted);
}

.search-icon .icon {
  width: 19px;
  height: 19px;
}

.hero-search input {
  width: 100%;
  min-width: 0;
  padding: 8px 0;
  background: transparent;
  border: 0;
  outline: 0;
  font-size: 14px;
}

.hero-search input::placeholder {
  color: #89928d;
}

.hero-search kbd {
  display: inline-grid;
  width: 26px;
  height: 26px;
  place-items: center;
  color: var(--muted);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-bottom-color: var(--line-strong);
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 11px;
}

.hero-search button {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  padding: 0;
  color: var(--surface);
  background: var(--orange);
  border: 0;
  border-radius: 4px;
  transition: background-color 160ms ease, transform 160ms ease;
}

.hero-search button:hover {
  background: var(--orange-deep);
  transform: translateX(2px);
}

.hero-search button .icon {
  width: 19px;
  height: 19px;
}

.hero-metrics {
  display: flex;
  align-items: stretch;
  gap: 42px;
  margin-top: 34px;
  padding-top: 24px;
  border-top: 1px solid var(--white-line);
}

.hero-metric {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.hero-metric strong {
  color: #fffdf8;
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 500;
  line-height: 1.2;
}

.hero-metric span {
  color: rgba(255, 255, 255, 0.56);
  font-size: 11px;
}

.hero-visual {
  position: relative;
  align-self: center;
  min-width: 0;
  padding: 18px;
  color: #dbe7de;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.2);
}

.hero-visual::before,
.hero-visual::after {
  position: absolute;
  width: 13px;
  height: 13px;
  border-color: var(--orange);
  border-style: solid;
  content: "";
}

.hero-visual::before {
  top: -1px;
  left: -1px;
  border-width: 2px 0 0 2px;
}

.hero-visual::after {
  right: -1px;
  bottom: -1px;
  border-width: 0 2px 2px 0;
}

.visual-topline,
.visual-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 9px;
}

.visual-topline {
  padding-bottom: 15px;
  color: rgba(255, 255, 255, 0.44);
  border-bottom: 1px solid var(--white-line);
}

.visual-online {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: #d9ecd9;
}

.visual-online i {
  width: 6px;
  height: 6px;
  background: #55d18a;
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(85, 209, 138, 0.12);
}

.hero-visual img {
  width: 100%;
  margin: 10px 0;
}

.visual-footer {
  padding-top: 14px;
  color: rgba(255, 255, 255, 0.35);
  border-top: 1px solid var(--white-line);
}

.visual-footer span:nth-child(2),
.visual-footer span:nth-child(3) {
  color: #ff9c78;
}

.course-directory {
  position: relative;
  padding-block: 92px 100px;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 440px);
  align-items: end;
  gap: 48px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--line-strong);
}

.section-index {
  margin-bottom: 9px;
  color: var(--orange-deep);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 650;
}

.section-heading h2,
.resource-heading h2 {
  margin-bottom: 0;
  font-size: 38px;
  font-weight: 760;
  line-height: 1.2;
}

.section-heading-side {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}

.section-heading-side p {
  max-width: 420px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.catalog-state {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--ink-2);
  font-family: var(--mono);
  font-size: 10px;
}

.catalog-state::before {
  width: 6px;
  height: 6px;
  background: var(--teal);
  border-radius: 50%;
  content: "";
}

.continue-learning {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 18px;
  margin-top: 26px;
  padding: 13px 14px 13px 18px;
  color: var(--surface);
  background: var(--ink-2);
  border-radius: 5px;
}

.continue-learning[hidden] {
  display: none;
}

.continue-label {
  color: #a9c5b8;
  font-family: var(--mono);
  font-size: 10px;
}

.continue-learning > a {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 5px 10px;
  border-left: 1px solid rgba(255, 255, 255, 0.2);
  font-size: 14px;
  font-weight: 650;
}

.continue-learning > a span:first-child {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.continue-learning > a .icon {
  color: var(--lime);
}

.icon-button {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  padding: 0;
  color: #bfd0c7;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 4px;
}

.icon-button:hover {
  color: var(--surface);
  border-color: rgba(255, 255, 255, 0.45);
}

.search-feedback {
  min-height: 0;
  margin-top: 0;
  color: var(--muted);
  font-size: 13px;
  opacity: 0;
  transform: translateY(-4px);
  transition: margin 160ms ease, opacity 160ms ease, transform 160ms ease;
}

.search-feedback.is-visible {
  min-height: 20px;
  margin-top: 18px;
  opacity: 1;
  transform: translateY(0);
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  margin-top: 34px;
}

.course-card {
  min-width: 0;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 1px 0 rgba(16, 42, 35, 0.03);
  transition: border-color 220ms ease, box-shadow 220ms ease, transform 220ms ease;
}

.course-card:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-soft);
}

.course-card:only-child {
  display: grid;
  grid-template-columns: minmax(380px, 0.94fr) minmax(0, 1.06fr);
}

.course-card-visual {
  position: relative;
  display: block;
  min-height: 330px;
  overflow: hidden;
  background: var(--ink);
}

.course-card:only-child .course-card-visual {
  min-height: 610px;
}

.course-card-visual::after {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(16, 42, 35, 0) 38%, rgba(16, 42, 35, 0.76) 100%);
  content: "";
  pointer-events: none;
}

.course-card-visual img {
  width: 100%;
  height: 100%;
  min-height: inherit;
  object-fit: cover;
  transition: transform 500ms cubic-bezier(0.22, 1, 0.36, 1);
}

.course-card:hover .course-card-visual img {
  transform: scale(1.025);
}

.course-card-number,
.course-card-open,
.course-card-visual-meta {
  position: absolute;
  z-index: 1;
}

.course-card-number {
  top: 18px;
  left: 18px;
  padding: 5px 8px;
  color: var(--surface);
  background: rgba(16, 42, 35, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 3px;
  font-family: var(--mono);
  font-size: 9px;
}

.course-card-open {
  top: 16px;
  right: 16px;
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  color: var(--ink);
  background: var(--lime);
  border-radius: 3px;
  transition: transform 180ms ease;
}

.course-card:hover .course-card-open {
  transform: translate(2px, -2px);
}

.course-card-visual-meta {
  right: 18px;
  bottom: 18px;
  left: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: rgba(255, 255, 255, 0.72);
  font-family: var(--mono);
  font-size: 9px;
}

.course-card-content {
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: 30px;
}

.course-card:only-child .course-card-content {
  padding: 42px 44px 36px;
}

.course-card-kicker {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
}

.course-card-kicker span:last-child {
  color: var(--teal);
  white-space: nowrap;
}

.course-card h3 {
  margin-bottom: 14px;
  font-size: 29px;
  font-weight: 760;
  line-height: 1.28;
}

.course-card:only-child h3 {
  font-size: 36px;
}

.course-card h3 a {
  background-image: linear-gradient(var(--ink), var(--ink));
  background-position: 0 100%;
  background-repeat: no-repeat;
  background-size: 0 1px;
  transition: background-size 220ms ease;
}

.course-card h3 a:hover {
  background-size: 100% 1px;
}

.course-card-description {
  max-width: 620px;
  margin-bottom: 20px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.topic-tags,
.resource-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.topic-tag {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 9px;
  color: var(--ink-2);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 3px;
  font-size: 11px;
  white-space: nowrap;
}

.quick-resources {
  margin-top: 25px;
  border-top: 1px solid var(--line);
}

.quick-resource-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0 8px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
}

.quick-resource-heading span:last-child {
  color: var(--orange-deep);
}

.quick-resource {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 12px 6px 12px 0;
  border-top: 1px solid rgba(16, 42, 35, 0.08);
  transition: padding 180ms ease, background-color 180ms ease;
}

.quick-resource:hover {
  padding-right: 10px;
  padding-left: 8px;
  background: var(--surface-2);
}

.quick-resource-icon {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: var(--ink-2);
  background: #edf3e9;
  border: 1px solid rgba(16, 42, 35, 0.09);
  border-radius: 4px;
}

.quick-resource-icon .icon {
  width: 17px;
  height: 17px;
}

.quick-resource-copy {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 2px;
}

.quick-resource-copy strong {
  overflow: hidden;
  font-size: 13px;
  font-weight: 650;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.quick-resource-copy small {
  color: var(--muted);
  font-size: 10px;
}

.quick-resource-arrow {
  color: var(--muted);
}

.quick-resource-arrow .icon {
  width: 15px;
  height: 15px;
}

.quick-resource:hover .quick-resource-arrow {
  color: var(--orange-deep);
}

.quick-resource-empty {
  margin: 0;
  padding: 16px 0;
  color: var(--muted);
  font-size: 13px;
  border-top: 1px solid rgba(16, 42, 35, 0.08);
}

.course-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: auto;
  padding-top: 26px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
}

.button {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 9px 15px;
  border: 1px solid transparent;
  border-radius: 4px;
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
  transition: color 160ms ease, background-color 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.button .icon {
  width: 16px;
  height: 16px;
}

.button-dark {
  color: var(--surface);
  background: var(--ink);
  border-color: var(--ink);
}

.button-dark:hover {
  background: var(--orange);
  border-color: var(--orange);
  transform: translateX(2px);
}

.button-outline {
  color: var(--ink);
  background: transparent;
  border-color: var(--line-strong);
}

.button-outline:hover {
  background: var(--surface);
  border-color: var(--ink);
}

.content-loading,
.page-loading {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
}

.content-loading {
  grid-column: 1 / -1;
  padding: 60px 0;
}

.empty-state {
  display: flex;
  min-height: 260px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
  text-align: center;
  background: rgba(255, 253, 248, 0.7);
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
}

.empty-state h3 {
  margin: 16px 0 8px;
  font-size: 22px;
}

.empty-state p {
  margin-bottom: 20px;
  color: var(--muted);
  font-size: 13px;
}

.empty-icon {
  display: grid;
  width: 54px;
  height: 54px;
  place-items: center;
  color: var(--orange-deep);
  background: #fdebe4;
  border: 1px solid rgba(240, 90, 40, 0.18);
  border-radius: 50%;
}

.empty-icon .icon {
  width: 24px;
  height: 24px;
}

.home-empty {
  grid-column: 1 / -1;
}

.site-footer {
  color: rgba(255, 255, 255, 0.68);
  background: #0b1f1a;
  border-top: 4px solid var(--orange);
}

.footer-main {
  display: grid;
  grid-template-columns: minmax(220px, auto) minmax(280px, 1fr) auto;
  align-items: end;
  gap: 40px;
  padding-block: 44px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 13px;
}

.footer-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: var(--ink);
  background: var(--lime);
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
}

.footer-brand strong {
  color: var(--surface);
  font-size: 16px;
}

.footer-brand p {
  margin: 2px 0 0;
  color: rgba(255, 255, 255, 0.48);
  font-size: 10px;
}

.footer-note {
  max-width: 450px;
  margin: 0;
  font-size: 11px;
  line-height: 1.7;
}

.footer-meta {
  margin: 0;
  font-family: var(--mono);
  font-size: 9px;
  white-space: nowrap;
}

.noscript-note {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 1000;
  padding: 14px 18px;
  color: var(--surface);
  background: var(--orange-deep);
  border-radius: 4px;
}

@keyframes cardReveal {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.course-card,
.resource-card {
  animation: cardReveal 480ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.resource-card:nth-child(2) {
  animation-delay: 80ms;
}

/* Course page */
.page-loading {
  display: flex;
  min-height: 60vh;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 14px;
}

.loading-line {
  display: block;
  width: 88px;
  height: 2px;
  overflow: hidden;
  background: var(--line);
}

.loading-line::after {
  display: block;
  width: 42px;
  height: 100%;
  background: var(--orange);
  content: "";
  animation: loadingLine 1s ease-in-out infinite alternate;
}

@keyframes loadingLine {
  from { transform: translateX(0); }
  to { transform: translateX(46px); }
}

.course-hero {
  position: relative;
  overflow: hidden;
  padding-top: 24px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--line);
}

.course-hero::before {
  position: absolute;
  top: 0;
  right: 0;
  width: 20%;
  height: 5px;
  background: var(--course-accent, var(--orange));
  content: "";
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--muted);
  font-size: 11px;
}

.breadcrumb a:hover {
  color: var(--ink);
}

.breadcrumb .icon {
  width: 13px;
  height: 13px;
  color: var(--muted-light);
}

.breadcrumb span {
  color: var(--ink-2);
}

.course-hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(380px, 0.92fr);
  align-items: center;
  gap: 72px;
  padding-block: 55px 62px;
}

.course-hero-copy {
  min-width: 0;
}

.course-hero h1 {
  max-width: 790px;
  margin-bottom: 22px;
  font-size: 58px;
  font-weight: 770;
  line-height: 1.12;
}

.course-hero-description {
  max-width: 730px;
  margin-bottom: 26px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.82;
}

.course-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 9px 20px;
  margin-bottom: 24px;
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--ink-2);
  font-size: 11px;
  font-weight: 650;
}

.meta-item .icon {
  width: 16px;
  height: 16px;
  color: var(--course-accent, var(--orange));
}

.course-topics {
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.course-hero-figure {
  position: relative;
  overflow: hidden;
  margin-bottom: 0;
  padding: 9px;
  background: var(--ink);
  border-radius: var(--radius);
  box-shadow: 0 24px 55px rgba(16, 42, 35, 0.14);
}

.course-hero-figure::before,
.course-hero-figure::after {
  position: absolute;
  z-index: 2;
  width: 15px;
  height: 15px;
  border-color: var(--lime);
  border-style: solid;
  content: "";
}

.course-hero-figure::before {
  top: 2px;
  left: 2px;
  border-width: 2px 0 0 2px;
}

.course-hero-figure::after {
  right: 2px;
  bottom: 2px;
  border-width: 0 2px 2px 0;
}

.course-hero-figure img {
  width: 100%;
  aspect-ratio: 1.42 / 1;
  object-fit: cover;
  border-radius: 4px;
}

.course-hero-figure figcaption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 6px 4px;
  color: rgba(255, 255, 255, 0.52);
  font-family: var(--mono);
  font-size: 8px;
}

.course-stat-bar {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.course-stat-bar > div {
  display: flex;
  min-height: 94px;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  padding: 14px 24px;
  border-left: 1px solid var(--line);
}

.course-stat-bar > div:first-child {
  border-left: 0;
  padding-left: 0;
}

.course-stat-bar strong {
  color: var(--ink);
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 550;
}

.course-stat-bar span {
  color: var(--muted);
  font-size: 10px;
}

.resource-directory {
  padding-block: 74px 96px;
}

.resource-toolbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 48px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line-strong);
}

.resource-heading {
  flex: 0 1 auto;
}

.resource-toolbar-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.resource-search {
  display: grid;
  width: min(340px, 42vw);
  min-height: 44px;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 9px;
  padding: 7px 13px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 4px;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.resource-search:focus-within {
  border-color: var(--orange);
  box-shadow: 0 0 0 3px rgba(240, 90, 40, 0.12);
}

.resource-search .icon {
  width: 17px;
  height: 17px;
  color: var(--muted);
}

.resource-search input {
  width: 100%;
  min-width: 0;
  padding: 4px 0;
  background: transparent;
  border: 0;
  outline: 0;
  font-size: 12px;
}

.resource-result-count {
  min-width: 126px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
  text-align: right;
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-block: 20px;
}

.filter-button {
  min-height: 34px;
  padding: 6px 12px;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 4px;
  font-size: 11px;
  transition: color 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

.filter-button:hover {
  color: var(--ink);
  border-color: var(--line-strong);
}

.filter-button.is-active {
  color: var(--surface);
  background: var(--ink);
  border-color: var(--ink);
}

.resource-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  margin-top: 12px;
}

.resource-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 1px 0 rgba(16, 42, 35, 0.03);
  transition: border-color 220ms ease, box-shadow 220ms ease, transform 220ms ease;
}

.resource-card:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-soft);
  transform: translateY(-4px);
}

.resource-card-visual {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  border-bottom: 1px solid var(--line);
}

.resource-card-visual img {
  width: 100%;
  aspect-ratio: 1.72 / 1;
  object-fit: cover;
  transition: transform 480ms cubic-bezier(0.22, 1, 0.36, 1);
}

.resource-card:hover .resource-card-visual img {
  transform: scale(1.025);
}

.resource-number,
.resource-mode {
  position: absolute;
  z-index: 1;
  top: 14px;
  min-height: 27px;
  padding: 4px 8px;
  border-radius: 3px;
  font-family: var(--mono);
  font-size: 9px;
}

.resource-number {
  left: 14px;
  color: var(--surface);
  background: rgba(16, 42, 35, 0.84);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.resource-mode {
  right: 14px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--ink);
  background: rgba(255, 253, 248, 0.92);
  border: 1px solid rgba(16, 42, 35, 0.08);
}

.resource-mode .icon {
  width: 13px;
  height: 13px;
}

.resource-card-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 26px 28px 24px;
}

.resource-card-kicker {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
  color: var(--teal);
  font-family: var(--mono);
  font-size: 9px;
}

.resource-duration {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--muted);
  white-space: nowrap;
}

.resource-duration .icon {
  width: 13px;
  height: 13px;
}

.resource-card h3 {
  margin-bottom: 12px;
  font-size: 25px;
  font-weight: 750;
  line-height: 1.35;
}

.resource-summary {
  min-height: 70px;
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.78;
}

.resource-tags span {
  display: inline-flex;
  min-height: 26px;
  align-items: center;
  padding: 3px 8px;
  color: var(--ink-2);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 3px;
  font-size: 10px;
}

.resource-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: auto;
  padding-top: 22px;
}

.browser-ready {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font-size: 9px;
}

.browser-ready i {
  width: 6px;
  height: 6px;
  background: #20a66a;
  border-radius: 50%;
}

.resource-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
}

.resource-cta .icon {
  width: 15px;
  height: 15px;
  color: var(--orange-deep);
  transition: transform 160ms ease;
}

.resource-card:hover .resource-cta .icon {
  transform: translate(2px, -2px);
}

.resource-empty {
  grid-column: 1 / -1;
}

.error-page {
  min-height: 68vh;
  padding-block: 90px;
  background: var(--surface-2);
}

.error-inner {
  max-width: 760px;
}

.error-inner h1 {
  margin-bottom: 20px;
  font-size: 56px;
  line-height: 1.1;
}

.error-inner > p:not(.section-index) {
  max-width: 520px;
  margin-bottom: 28px;
  color: var(--muted);
}

@media (max-width: 1120px) {
  .hero-layout {
    grid-template-columns: minmax(0, 1fr) minmax(340px, 0.78fr);
    gap: 46px;
    padding-block: 58px 68px;
  }

  .hero h1 {
    font-size: 62px;
  }

  .hero::before {
    left: 64%;
  }

  .course-card:only-child {
    grid-template-columns: minmax(330px, 0.88fr) minmax(0, 1.12fr);
  }

  .course-card:only-child .course-card-visual {
    min-height: 650px;
  }

  .course-card:only-child .course-card-content {
    padding: 36px;
  }

  .course-card:only-child h3 {
    font-size: 32px;
  }

  .course-hero-layout {
    grid-template-columns: minmax(0, 1fr) minmax(340px, 0.78fr);
    gap: 48px;
  }

  .course-hero h1 {
    font-size: 48px;
  }

  .resource-toolbar {
    gap: 28px;
  }
}

@media (max-width: 920px) {
  :root {
    --header-height: 66px;
  }

  .container {
    width: min(var(--max-width), calc(100% - 44px));
  }

  .header-inner {
    gap: 14px;
  }

  .header-status {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .site-nav {
    position: fixed;
    top: var(--header-height);
    right: 0;
    left: 0;
    display: none;
    height: calc(100svh - var(--header-height));
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 20px 22px 40px;
    background: var(--paper);
    border-top: 1px solid var(--line);
    box-shadow: 0 20px 40px rgba(16, 42, 35, 0.16);
  }

  body.nav-open .site-nav {
    display: flex;
  }

  .site-nav a {
    min-height: 58px;
    padding: 0 8px;
    border-bottom: 1px solid var(--line);
    font-size: 16px;
  }

  .site-nav a::after {
    right: auto;
    bottom: -1px;
    left: 8px;
    width: 52px;
  }

  .hero::before {
    display: none;
  }

  .hero-layout {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 44px;
    padding-block: 56px 64px;
  }

  .hero h1 {
    max-width: 760px;
    font-size: 64px;
  }

  .hero-visual {
    width: min(100%, 730px);
  }

  .course-card:only-child {
    grid-template-columns: 1fr;
  }

  .course-card:only-child .course-card-visual {
    min-height: 390px;
  }

  .course-card:only-child .course-card-content {
    padding: 32px;
  }

  .course-hero-layout {
    grid-template-columns: 1fr;
    gap: 38px;
    padding-block: 46px 52px;
  }

  .course-hero h1 {
    font-size: 52px;
  }

  .course-hero-figure {
    max-width: 680px;
  }

  .course-stat-bar > div {
    padding-inline: 16px;
  }

  .resource-toolbar {
    align-items: flex-start;
    flex-direction: column;
    gap: 22px;
  }

  .resource-toolbar-actions {
    width: 100%;
    justify-content: space-between;
  }

  .resource-search {
    width: min(100%, 420px);
  }

  .resource-result-count {
    min-width: auto;
  }
}

@media (max-width: 760px) {
  .container {
    width: calc(100% - 32px);
  }

  .brand-copy small {
    display: none;
  }

  .brand-copy strong {
    font-size: 16px;
  }

  .brand-mark {
    width: 37px;
    height: 37px;
  }

  .hero-layout {
    gap: 36px;
    padding-block: 44px 48px;
  }

  .hero h1 {
    margin-bottom: 20px;
    font-size: 47px;
  }

  .hero-intro {
    margin-bottom: 24px;
    font-size: 15px;
    line-height: 1.75;
  }

  .hero-search {
    grid-template-columns: auto minmax(0, 1fr) 40px;
    gap: 9px;
  }

  .hero-search kbd {
    display: none;
  }

  .hero-search button {
    width: 40px;
    height: 40px;
  }

  .hero-metrics {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
    margin-top: 28px;
  }

  .hero-metric strong {
    font-size: 18px;
  }

  .hero-metric span {
    font-size: 10px;
  }

  .hero-visual {
    padding: 13px;
  }

  .course-directory {
    padding-block: 68px 76px;
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 18px;
    padding-bottom: 24px;
  }

  .section-heading h2,
  .resource-heading h2 {
    font-size: 31px;
  }

  .section-heading-side {
    gap: 10px;
  }

  .course-grid {
    grid-template-columns: 1fr;
    margin-top: 26px;
  }

  .course-card-visual,
  .course-card:only-child .course-card-visual {
    min-height: 290px;
  }

  .course-card-content,
  .course-card:only-child .course-card-content {
    padding: 26px 22px;
  }

  .course-card h3,
  .course-card:only-child h3 {
    font-size: 27px;
  }

  .continue-learning {
    grid-template-columns: 1fr auto;
    gap: 8px 12px;
    padding: 13px;
  }

  .continue-label {
    grid-column: 1 / -1;
  }

  .continue-learning > a {
    padding-left: 0;
    border-left: 0;
  }

  .footer-main {
    grid-template-columns: 1fr;
    align-items: start;
    gap: 24px;
    padding-block: 36px;
  }

  .footer-meta {
    white-space: normal;
  }

  .course-hero {
    padding-top: 18px;
  }

  .course-hero-layout {
    padding-block: 36px 42px;
  }

  .course-hero h1 {
    font-size: 39px;
  }

  .course-hero-description {
    font-size: 14px;
  }

  .course-hero-figure img {
    aspect-ratio: 1.48 / 1;
  }

  .course-stat-bar {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .course-stat-bar > div {
    min-height: 78px;
    padding: 12px 16px;
    border-top: 1px solid var(--line);
  }

  .course-stat-bar > div:nth-child(odd) {
    padding-left: 0;
    border-left: 0;
  }

  .course-stat-bar > div:nth-child(-n + 2) {
    border-top: 0;
  }

  .resource-directory {
    padding-block: 55px 72px;
  }

  .resource-toolbar-actions {
    align-items: stretch;
    flex-direction: column;
    gap: 10px;
  }

  .resource-search {
    width: 100%;
  }

  .resource-result-count {
    text-align: left;
  }

  .filter-row {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 16px;
    scrollbar-width: thin;
  }

  .filter-button {
    flex: 0 0 auto;
  }

  .resource-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .resource-card-body {
    padding: 22px 20px;
  }

  .resource-summary {
    min-height: 0;
  }

  .resource-card h3 {
    font-size: 23px;
  }

  .error-inner h1 {
    font-size: 40px;
  }

  .course-card,
  .resource-card {
    animation-duration: 360ms;
  }
}

@media (max-width: 480px) {
  .header-inner {
    gap: 10px;
  }

  .brand {
    gap: 9px;
  }

  .brand-copy strong {
    font-size: 15px;
  }

  .nav-toggle {
    width: 37px;
    height: 37px;
  }

  .hero h1 {
    font-size: 40px;
  }

  .eyebrow {
    gap: 10px;
    font-size: 9px;
  }

  .eyebrow span + span {
    gap: 9px;
  }

  .eyebrow span + span::before {
    width: 18px;
  }

  .hero-search {
    min-height: 54px;
    padding-left: 13px;
  }

  .hero-search input {
    font-size: 12px;
  }

  .hero-metric span {
    max-width: 64px;
    line-height: 1.4;
  }

  .visual-footer {
    font-size: 8px;
  }

  .course-card-visual,
  .course-card:only-child .course-card-visual {
    min-height: 250px;
  }

  .course-card-kicker {
    align-items: flex-start;
    flex-direction: column;
    gap: 5px;
  }

  .course-card-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .course-card-footer .button {
    width: 100%;
  }

  .quick-resource-copy strong {
    font-size: 12px;
  }

  .course-hero h1 {
    font-size: 34px;
  }

  .course-hero-meta {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .course-hero-figure figcaption {
    font-size: 7px;
  }

  .course-stat-bar strong {
    font-size: 17px;
  }

  .resource-card-kicker {
    align-items: flex-start;
    flex-direction: column;
    gap: 5px;
  }

  .resource-card-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .resource-cta {
    width: 100%;
    justify-content: space-between;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}