/* ==========================================================================
   AskAiml Academy — course index, lesson reader, quizzes, certificates.
   Builds on the tokens defined in styles.css.
   ========================================================================== */

:root {
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --sidebar-width: 312px;
  --header-height: 73px;
  --ok: #34d399;
  --warn: #fbbf24;
  --bad: #f87171;
}

/* The landing page collapses header actions into a hamburger. Academy pages
   have a short nav, so keep the auth buttons reachable on small screens. */
@media (max-width: 720px) {
  .academy-page .header-actions .btn {
    display: inline-flex;
    padding: 9px 14px;
    font-size: 14px;
  }
  .academy-page .header-auth .btn-ghost {
    display: none;
  }
}

/* ==========================================================================
   Academy index — hero
   ========================================================================== */

.academy-hero {
  position: relative;
  padding: 72px 0 40px;
  overflow: hidden;
}

.academy-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 56px;
  align-items: start;
}

.academy-hero .hero-title {
  font-family: var(--font-display);
  font-size: clamp(34px, 5vw, 54px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin: 18px 0 16px;
}

.academy-hero .hero-sub {
  color: var(--text-muted);
  font-size: 17px;
  max-width: 60ch;
  margin-bottom: 28px;
}

.academy-hero .hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

.academy-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  list-style: none;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.academy-facts li {
  color: var(--text-muted);
  font-size: 14px;
}

.academy-facts strong {
  display: block;
  font-family: var(--font-display);
  font-size: 24px;
  color: var(--text);
  line-height: 1.2;
}

/* ---- Progress card with ring ---- */

.academy-progress-card {
  position: relative;
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow);
}

.progress-ring-wrap {
  position: relative;
  width: 148px;
  margin: 0 auto 8px;
}

.progress-ring {
  width: 148px;
  height: 148px;
  transform: rotate(-90deg);
}

.progress-ring circle {
  fill: none;
  stroke-width: 9;
  stroke-linecap: round;
}

.ring-track {
  stroke: rgba(148, 163, 184, 0.16);
}

.ring-fill {
  stroke: url(#ringGradient) var(--primary-2);
  stroke-dasharray: 327;
  stroke-dashoffset: 327;
  transition: stroke-dashoffset 0.9s cubic-bezier(0.22, 1, 0.36, 1);
}

.progress-ring-label {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
}

.progress-ring-label strong {
  font-family: var(--font-display);
  font-size: 30px;
  line-height: 1;
}

.progress-ring-label span {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.progress-stats {
  display: grid;
  gap: 2px;
  margin: 20px 0 22px;
}

.progress-stats > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.progress-stats > div:last-child {
  border-bottom: 0;
}

.progress-stats dt {
  color: var(--text-muted);
  font-size: 14px;
}

.progress-stats dd {
  font-weight: 600;
  font-size: 14px;
  text-align: right;
}

.progress-cta .btn-block {
  width: 100%;
}

.progress-cta p {
  color: var(--text-muted);
  font-size: 14px;
  text-align: center;
}

/* ==========================================================================
   Module grid
   ========================================================================== */

.module-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 22px;
}

.module-card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.module-card:hover {
  transform: translateY(-4px);
  border-color: rgba(109, 94, 242, 0.45);
  box-shadow: 0 24px 60px -28px rgba(109, 94, 242, 0.5);
}

.module-card.is-complete {
  border-color: rgba(52, 211, 153, 0.4);
}

.module-card-head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 14px;
}

.module-icon {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  border-radius: 13px;
  font-size: 21px;
  background: rgba(109, 94, 242, 0.14);
  border: 1px solid rgba(109, 94, 242, 0.24);
}

.module-eyebrow {
  display: block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary-2);
}

.module-card-head h3 {
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.25;
  margin-top: 2px;
}

.module-badge {
  margin-left: auto;
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(52, 211, 153, 0.16);
  color: var(--ok);
  border: 1px solid rgba(52, 211, 153, 0.45);
  font-size: 14px;
  font-weight: 700;
}

.module-summary {
  color: var(--text-muted);
  font-size: 14.5px;
  margin-bottom: 18px;
}

.module-lessons {
  list-style: none;
  display: grid;
  gap: 2px;
  margin-bottom: 20px;
}

.module-lessons a {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 7px 8px;
  margin: 0 -8px;
  border-radius: 9px;
  font-size: 14px;
  color: var(--text-muted);
  transition: background 0.16s ease, color 0.16s ease;
}

.module-lessons a:hover {
  background: rgba(148, 163, 184, 0.08);
  color: var(--text);
}

.module-lessons li.is-done a {
  color: var(--text);
}

/* ---- Completion ticks (shared by cards and sidebar) ---- */

.outline-tick {
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin-top: 3px;
  border-radius: 50%;
  border: 1.5px solid rgba(148, 163, 184, 0.4);
  position: relative;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.is-done .outline-tick,
.outline-lesson.is-done .outline-tick,
.outline-quiz.is-done .outline-tick {
  background: var(--ok);
  border-color: var(--ok);
}

.is-done .outline-tick::after,
.outline-lesson.is-done .outline-tick::after,
.outline-quiz.is-done .outline-tick::after {
  content: "";
  position: absolute;
  left: 4.5px;
  top: 2px;
  width: 4px;
  height: 7.5px;
  border: solid #062a1d;
  border-width: 0 2px 2px 0;
  transform: rotate(42deg);
}

.module-card-foot {
  margin-top: auto;
  display: grid;
  gap: 16px;
}

.progress-track {
  height: 6px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.16);
  overflow: hidden;
}

.progress-fill {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: var(--gradient);
  transition: width 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.module-progress {
  display: grid;
  gap: 8px;
}

.module-progress-label {
  font-size: 12.5px;
  color: var(--text-muted);
}

.module-card-actions {
  display: flex;
  gap: 10px;
}

.module-card-actions .btn {
  flex: 1;
  padding: 9px 14px;
  font-size: 14px;
}

/* ==========================================================================
   Badges + certificate teaser
   ========================================================================== */

.badge-grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 14px;
  margin-bottom: 40px;
}

.badge-chip {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  transition: border-color 0.22s ease, transform 0.22s ease, box-shadow 0.22s ease;
}

.badge-chip.is-locked {
  opacity: 0.45;
  filter: grayscale(1);
}

.badge-chip.is-earned {
  opacity: 1;
  filter: none;
  border-color: rgba(155, 92, 246, 0.5);
  box-shadow: 0 14px 40px -22px rgba(155, 92, 246, 0.8);
}

.badge-chip.is-earned .badge-icon {
  background: var(--gradient);
  border-color: transparent;
}

.badge-icon {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  font-size: 19px;
  background: rgba(148, 163, 184, 0.1);
  border: 1px solid var(--border);
}

.badge-name {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.3;
}

.certificate-teaser {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 30px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(155, 92, 246, 0.32);
  background:
    radial-gradient(120% 160% at 100% 0%, rgba(155, 92, 246, 0.16), transparent 60%),
    var(--surface);
}

.certificate-teaser h3 {
  font-family: var(--font-display);
  font-size: 21px;
  margin-bottom: 6px;
}

.certificate-teaser p {
  color: var(--text-muted);
  font-size: 15px;
  max-width: 62ch;
}

/* ==========================================================================
   Projects
   ========================================================================== */

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.project-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  transition: transform 0.22s ease, border-color 0.22s ease;
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: rgba(34, 211, 238, 0.4);
}

.project-difficulty {
  align-self: flex-start;
  padding: 4px 11px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(34, 211, 238, 0.12);
  border: 1px solid rgba(34, 211, 238, 0.28);
}

.project-card h3 {
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.3;
}

.project-card h3 a:hover {
  color: var(--accent);
}

.project-card p {
  color: var(--text-muted);
  font-size: 14.5px;
}

.project-link {
  margin-top: auto;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary-2);
}

.section-foot {
  text-align: center;
  margin-top: 36px;
}

/* ==========================================================================
   Lesson shell — sidebar + reader
   ========================================================================== */

.academy-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  align-items: start;
  gap: 0;
  max-width: 1440px;
  margin: 0 auto;
}

.lesson-sidebar {
  position: sticky;
  top: var(--header-height);
  height: calc(100vh - var(--header-height));
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 26px 20px 60px;
  border-right: 1px solid var(--border);
  background: var(--bg-alt);
  scrollbar-width: thin;
  scrollbar-color: rgba(148, 163, 184, 0.3) transparent;
}

.lesson-sidebar::-webkit-scrollbar {
  width: 8px;
}

.lesson-sidebar::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.25);
  border-radius: 999px;
}

.sidebar-head {
  padding-bottom: 18px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--border);
}

.sidebar-back {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}

.sidebar-back:hover {
  color: var(--primary-2);
}

.sidebar-title {
  font-family: var(--font-display);
  font-size: 17px;
  margin: 10px 0 16px;
}

.sidebar-progress {
  display: grid;
  gap: 8px;
}

.progress-label {
  font-size: 12.5px;
  color: var(--text-muted);
}

.sidebar-outline {
  display: grid;
  gap: 4px;
}

.outline-module {
  border-radius: 10px;
}

.outline-module summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  list-style: none;
  transition: background 0.16s ease;
}

.outline-module summary::-webkit-details-marker {
  display: none;
}

.outline-module summary:hover {
  background: rgba(148, 163, 184, 0.08);
}

.outline-icon {
  font-size: 15px;
  line-height: 1;
}

.outline-module-title {
  flex: 1;
  min-width: 0;
}

.outline-count {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-muted);
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.12);
}

.outline-count.is-complete {
  color: var(--ok);
  background: rgba(52, 211, 153, 0.14);
}

.outline-lessons {
  list-style: none;
  margin: 2px 0 8px;
  padding-left: 13px;
  border-left: 1px solid var(--border);
}

.outline-lesson,
.outline-quiz,
.outline-exam {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  padding: 7px 10px;
  border-radius: 9px;
  font-size: 13.5px;
  line-height: 1.4;
  color: var(--text-muted);
  transition: background 0.16s ease, color 0.16s ease;
}

.outline-lesson:hover,
.outline-quiz:hover,
.outline-exam:hover {
  background: rgba(148, 163, 184, 0.08);
  color: var(--text);
}

.outline-lesson.is-current {
  background: rgba(109, 94, 242, 0.16);
  color: #fff;
  font-weight: 600;
}

.outline-quiz .outline-text {
  font-style: italic;
}

.outline-exam {
  align-items: center;
  margin-top: 8px;
  padding: 11px 10px;
  font-weight: 600;
  font-size: 14px;
  border: 1px dashed rgba(155, 92, 246, 0.4);
}

/* ---- Reader column ---- */

.lesson-main {
  min-width: 0;
  padding: 40px 0 80px;
}

.lesson-article,
.quiz-article {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 32px;
}

.container-reading {
  max-width: 820px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.breadcrumb a:hover {
  color: var(--primary-2);
}

.lesson-head h1 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 38px);
  line-height: 1.14;
  letter-spacing: -0.025em;
  margin-bottom: 14px;
}

.lesson-lede {
  color: var(--text-muted);
  font-size: 17px;
  line-height: 1.6;
  margin-bottom: 20px;
}

.lesson-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
}

.meta-pill {
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-muted);
  background: rgba(148, 163, 184, 0.1);
  border: 1px solid var(--border);
}

.meta-pill.is-done {
  color: var(--ok);
  background: rgba(52, 211, 153, 0.12);
  border-color: rgba(52, 211, 153, 0.35);
}

/* ---- Table of contents ---- */

.lesson-toc {
  margin: 28px 0 8px;
  padding: 18px 22px;
  border-radius: var(--radius);
  background: var(--bg-alt);
  border: 1px solid var(--border);
}

.toc-title {
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary-2);
  margin-bottom: 10px;
}

.lesson-toc ol {
  columns: 2;
  column-gap: 28px;
  list-style: none;
  counter-reset: toc;
}

.lesson-toc li {
  counter-increment: toc;
  break-inside: avoid;
  margin-bottom: 5px;
}

.lesson-toc a {
  display: block;
  font-size: 13.5px;
  color: var(--text-muted);
  padding: 2px 0;
}

.lesson-toc a::before {
  content: counter(toc) ". ";
  color: rgba(148, 163, 184, 0.5);
}

.lesson-toc a:hover {
  color: var(--text);
}

/* ==========================================================================
   Prose — rendered markdown
   ========================================================================== */

.prose {
  font-size: 16.5px;
  line-height: 1.75;
  color: #d5dcea;
}

.prose > * + * {
  margin-top: 1.15em;
}

.prose h2 {
  font-family: var(--font-display);
  font-size: 25px;
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--text);
  margin-top: 2.2em;
  padding-top: 0.2em;
  scroll-margin-top: calc(var(--header-height) + 20px);
}

.prose h3 {
  font-family: var(--font-display);
  font-size: 19.5px;
  color: var(--text);
  margin-top: 1.9em;
  scroll-margin-top: calc(var(--header-height) + 20px);
}

.prose h4 {
  font-size: 16.5px;
  font-weight: 700;
  color: var(--text);
  margin-top: 1.6em;
}

.prose strong {
  color: #fff;
  font-weight: 650;
}

.prose em {
  color: #e3e9f5;
}

.prose a {
  color: #a5b4fc;
  text-decoration: underline;
  text-decoration-color: rgba(165, 180, 252, 0.4);
  text-underline-offset: 3px;
}

.prose a:hover {
  color: var(--accent);
  text-decoration-color: var(--accent);
}

.prose ul,
.prose ol {
  padding-left: 1.4em;
}

.prose li + li {
  margin-top: 0.4em;
}

.prose li::marker {
  color: var(--primary-2);
}

.prose blockquote {
  padding: 2px 0 2px 20px;
  border-left: 3px solid var(--primary);
  color: var(--text-muted);
  font-style: italic;
}

.prose hr {
  border: 0;
  height: 1px;
  background: var(--border);
  margin: 2.6em 0;
}

.prose :not(pre) > code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  padding: 2px 6px;
  border-radius: 6px;
  background: rgba(109, 94, 242, 0.14);
  border: 1px solid rgba(109, 94, 242, 0.22);
  color: #cdd6f4;
  white-space: nowrap;
}

/* ---- Code blocks ---- */

.code-block {
  position: relative;
  margin: 1.6em 0;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: #08101d;
  overflow: hidden;
}

.code-lang {
  position: absolute;
  top: 0;
  right: 0;
  padding: 4px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: rgba(148, 163, 184, 0.08);
  border-bottom-left-radius: 10px;
}

.code-block pre {
  margin: 0;
  padding: 20px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.code-block code {
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.65;
  color: #c9d4e8;
  tab-size: 2;
}

/* highlight.js tokens, tuned to the site palette */
.hljs-comment,
.hljs-quote {
  color: #64748b;
  font-style: italic;
}

.hljs-keyword,
.hljs-selector-tag,
.hljs-literal,
.hljs-type {
  color: #c084fc;
}

.hljs-string,
.hljs-addition,
.hljs-attribute,
.hljs-regexp {
  color: #7ee7c7;
}

.hljs-number,
.hljs-symbol,
.hljs-bullet,
.hljs-meta {
  color: #fbbf24;
}

.hljs-title,
.hljs-section,
.hljs-name,
.hljs-selector-id,
.hljs-selector-class {
  color: #7dd3fc;
}

.hljs-attr,
.hljs-variable,
.hljs-template-variable,
.hljs-property {
  color: #f0abfc;
}

.hljs-built_in,
.hljs-class .hljs-title,
.hljs-function .hljs-title {
  color: #93c5fd;
}

.hljs-deletion {
  color: var(--bad);
}

.hljs-emphasis {
  font-style: italic;
}

.hljs-strong {
  font-weight: 700;
}

/* ---- Tables ---- */

.table-scroll {
  overflow-x: auto;
  margin: 1.8em 0;
  border: 1px solid var(--border);
  border-radius: 14px;
  scrollbar-width: thin;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}

.prose th,
.prose td {
  padding: 11px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border);
}

.prose th {
  background: rgba(148, 163, 184, 0.07);
  font-weight: 650;
  color: #fff;
  white-space: nowrap;
}

.prose tbody tr:last-child td {
  border-bottom: 0;
}

.prose tbody tr:hover td {
  background: rgba(148, 163, 184, 0.04);
}

.prose td code {
  white-space: nowrap;
}

/* ==========================================================================
   Lesson footer — completion + navigation
   ========================================================================== */

.lesson-actions {
  margin-top: 48px;
  padding: 26px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-alt);
  text-align: center;
}

.lesson-actions .btn.is-done {
  background: rgba(52, 211, 153, 0.14);
  border-color: rgba(52, 211, 153, 0.45);
  color: var(--ok);
  box-shadow: none;
}

.lesson-actions-note {
  margin-top: 12px;
  font-size: 13.5px;
  color: var(--text-muted);
}

.lesson-actions-note a {
  color: var(--primary-2);
  font-weight: 600;
}

.lesson-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 24px;
}

.lesson-nav-card {
  display: grid;
  gap: 5px;
  padding: 18px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.lesson-nav-card:hover {
  border-color: rgba(109, 94, 242, 0.5);
  transform: translateY(-2px);
}

.lesson-nav-card.is-next {
  text-align: right;
}

.nav-dir {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--primary-2);
}

.nav-title {
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.35;
}

/* ==========================================================================
   Quiz
   ========================================================================== */

.quiz-root {
  margin-top: 32px;
}

.quiz-loading,
.quiz-gate {
  padding: 40px 24px;
  text-align: center;
  color: var(--text-muted);
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
}

.quiz-gate h2 {
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--text);
  margin-bottom: 10px;
}

.quiz-gate .btn {
  margin-top: 18px;
}

.quiz-question {
  padding: 24px 26px;
  margin-bottom: 16px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
}

.quiz-question.is-unanswered {
  border-color: rgba(251, 191, 36, 0.45);
}

.quiz-question-head {
  display: flex;
  gap: 13px;
  margin-bottom: 18px;
}

.quiz-number {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 27px;
  height: 27px;
  border-radius: 9px;
  font-size: 13px;
  font-weight: 700;
  color: var(--primary-2);
  background: rgba(109, 94, 242, 0.14);
  border: 1px solid rgba(109, 94, 242, 0.26);
}

.quiz-prompt {
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.5;
}

.quiz-prompt code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 1px 5px;
  border-radius: 5px;
  background: rgba(109, 94, 242, 0.16);
}

.quiz-options {
  display: grid;
  gap: 9px;
  list-style: none;
}

.quiz-option {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 13px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-alt);
  cursor: pointer;
  font-size: 15px;
  line-height: 1.5;
  transition: border-color 0.16s ease, background 0.16s ease;
}

.quiz-option:hover {
  border-color: rgba(109, 94, 242, 0.45);
}

.quiz-option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.option-marker {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  margin-top: 1px;
  border-radius: 50%;
  border: 1.5px solid rgba(148, 163, 184, 0.45);
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  transition: all 0.16s ease;
}

.quiz-option:has(input:checked) {
  border-color: var(--primary);
  background: rgba(109, 94, 242, 0.12);
}

.quiz-option:has(input:checked) .option-marker {
  background: var(--gradient);
  border-color: transparent;
  color: #fff;
}

.quiz-option:has(input:focus-visible) {
  outline: 2px solid var(--primary-2);
  outline-offset: 2px;
}

/* ---- Graded states ---- */

.quiz-option.is-correct {
  border-color: rgba(52, 211, 153, 0.55);
  background: rgba(52, 211, 153, 0.1);
}

.quiz-option.is-correct .option-marker {
  background: var(--ok);
  border-color: transparent;
  color: #062a1d;
}

.quiz-option.is-wrong {
  border-color: rgba(248, 113, 113, 0.55);
  background: rgba(248, 113, 113, 0.1);
}

.quiz-option.is-wrong .option-marker {
  background: var(--bad);
  border-color: transparent;
  color: #2b0808;
}

.quiz-question.is-reviewed .quiz-option {
  cursor: default;
}

.quiz-explanation {
  display: flex;
  gap: 11px;
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: 12px;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--text-muted);
  background: rgba(148, 163, 184, 0.07);
  border-left: 3px solid var(--primary);
}

.quiz-explanation strong {
  color: var(--text);
}

/* ---- Submit bar ---- */

.quiz-submit {
  position: sticky;
  bottom: 16px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 24px;
  padding: 16px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(14, 23, 40, 0.92);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
}

.quiz-answered {
  font-size: 14px;
  color: var(--text-muted);
}

.quiz-answered strong {
  color: var(--text);
}

.quiz-error {
  color: var(--bad);
  font-size: 14px;
}

/* ---- Result panel ---- */

.quiz-result {
  padding: 30px;
  margin-bottom: 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  text-align: center;
}

.quiz-result.is-pass {
  border-color: rgba(52, 211, 153, 0.4);
  background:
    radial-gradient(120% 150% at 50% 0%, rgba(52, 211, 153, 0.14), transparent 62%),
    var(--surface);
}

.quiz-result.is-fail {
  border-color: rgba(251, 191, 36, 0.4);
  background:
    radial-gradient(120% 150% at 50% 0%, rgba(251, 191, 36, 0.12), transparent 62%),
    var(--surface);
}

.result-score {
  font-family: var(--font-display);
  font-size: 46px;
  line-height: 1;
  margin-bottom: 8px;
}

.quiz-result.is-pass .result-score {
  color: var(--ok);
}

.quiz-result.is-fail .result-score {
  color: var(--warn);
}

.result-headline {
  font-family: var(--font-display);
  font-size: 22px;
  margin-bottom: 8px;
}

.result-detail {
  color: var(--text-muted);
  font-size: 15px;
  max-width: 54ch;
  margin: 0 auto;
}

.result-badge {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-top: 22px;
  padding: 12px 20px;
  border-radius: 999px;
  border: 1px solid rgba(155, 92, 246, 0.45);
  background: rgba(155, 92, 246, 0.12);
  font-weight: 600;
  animation: badge-pop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.result-badge .badge-icon {
  width: 32px;
  height: 32px;
  font-size: 16px;
  background: var(--gradient);
  border-color: transparent;
}

@keyframes badge-pop {
  from {
    opacity: 0;
    transform: scale(0.7);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 24px;
}

.review-title {
  font-family: var(--font-display);
  font-size: 20px;
  margin-bottom: 16px;
}

/* ==========================================================================
   Certificate
   ========================================================================== */

.certificate-page {
  padding: 56px 0 90px;
}

.certificate-lookup {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 40px;
}

.certificate-lookup input {
  flex: 1 1 260px;
  max-width: 320px;
  padding: 12px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.certificate-lookup input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(109, 94, 242, 0.18);
}

.certificate {
  position: relative;
  max-width: 820px;
  margin: 0 auto;
  padding: 3px;
  border-radius: 26px;
  background: var(--gradient);
  box-shadow: 0 40px 90px -40px rgba(109, 94, 242, 0.7);
}

.certificate-inner {
  position: relative;
  padding: 56px 52px 44px;
  border-radius: 23px;
  background:
    radial-gradient(90% 120% at 50% 0%, rgba(109, 94, 242, 0.16), transparent 60%),
    var(--bg-alt);
  overflow: hidden;
  text-align: center;
}

.certificate-inner::before {
  content: "";
  position: absolute;
  inset: 16px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 14px;
  pointer-events: none;
}

.certificate-seal {
  display: grid;
  place-items: center;
  width: 68px;
  height: 68px;
  margin: 0 auto 20px;
  border-radius: 50%;
  font-size: 30px;
  background: var(--gradient);
  box-shadow: 0 14px 40px -14px rgba(155, 92, 246, 0.9);
}

.certificate-eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--primary-2);
  margin-bottom: 18px;
}

.certificate-name {
  font-family: var(--font-display);
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.certificate-body {
  color: var(--text-muted);
  font-size: 16px;
  max-width: 52ch;
  margin: 0 auto 6px;
}

.certificate-credential {
  font-family: var(--font-display);
  font-size: clamp(20px, 3vw, 26px);
  color: var(--text);
  margin: 14px 0 26px;
}

.certificate-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px 40px;
  padding-top: 26px;
  margin-top: 26px;
  border-top: 1px solid var(--border);
}

.certificate-footer div {
  min-width: 130px;
}

.certificate-footer dt {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.certificate-footer dd {
  font-family: var(--font-mono);
  font-size: 14.5px;
  font-weight: 500;
}

.certificate-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 32px;
}

.certificate-invalid {
  max-width: 520px;
  margin: 0 auto;
  padding: 40px 30px;
  text-align: center;
  border-radius: var(--radius-lg);
  border: 1px dashed rgba(248, 113, 113, 0.4);
  background: var(--surface);
}

.certificate-invalid h2 {
  font-family: var(--font-display);
  font-size: 22px;
  margin-bottom: 10px;
}

.certificate-invalid p {
  color: var(--text-muted);
}

@media print {
  .site-header,
  .site-footer,
  .certificate-lookup,
  .certificate-actions,
  .certificate-page .section-head {
    display: none !important;
  }
  body {
    background: #fff;
  }
  .certificate {
    box-shadow: none;
  }
  .certificate-inner {
    background: #0b1220;
  }
}

/* ==========================================================================
   Dashboard academy panel
   ========================================================================== */

.dash-academy {
  grid-column: 1 / -1;
  display: grid;
  gap: 20px;
}

.dash-academy-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.dash-continue {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  border-radius: var(--radius);
  border: 1px solid rgba(109, 94, 242, 0.35);
  background: rgba(109, 94, 242, 0.09);
}

.dash-continue-text {
  min-width: 0;
}

.dash-continue-text span {
  display: block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary-2);
}

.dash-continue-text strong {
  font-size: 15.5px;
  line-height: 1.35;
}

.dash-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
}

.dash-badges .badge-chip {
  padding: 9px 13px;
  gap: 9px;
}

.dash-badges .badge-icon {
  width: 30px;
  height: 30px;
  font-size: 15px;
}

.dash-badges .badge-name {
  font-size: 13px;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1080px) {
  .academy-hero-inner {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .academy-progress-card {
    max-width: 460px;
  }
}

@media (max-width: 960px) {
  .academy-shell {
    grid-template-columns: 1fr;
  }

  .lesson-sidebar {
    position: static;
    height: auto;
    max-height: none;
    overflow: visible;
    border-right: 0;
    border-bottom: 1px solid var(--border);
    padding: 20px 24px 24px;
  }

  .sidebar-outline {
    display: none;
  }

  .lesson-sidebar.is-open .sidebar-outline {
    display: grid;
  }

  .sidebar-toggle {
    display: inline-flex;
    margin-top: 14px;
  }

  .lesson-main {
    padding: 28px 0 64px;
  }

  .lesson-article,
  .quiz-article {
    padding: 0 24px;
  }
}

@media (max-width: 700px) {
  .academy-hero {
    padding: 48px 0 24px;
  }

  .lesson-toc ol {
    columns: 1;
  }

  .lesson-nav {
    grid-template-columns: 1fr;
  }

  .lesson-nav-card.is-next {
    text-align: left;
  }

  .prose {
    font-size: 16px;
  }

  .quiz-question {
    padding: 20px 18px;
  }

  .certificate-inner {
    padding: 40px 24px 32px;
  }

  .certificate-inner::before {
    inset: 10px;
  }

  .quiz-submit {
    flex-direction: column;
    align-items: stretch;
  }

  .quiz-submit .btn {
    width: 100%;
  }
}

.sidebar-toggle {
  display: none;
  padding: 9px 16px;
  font-size: 14px;
}


/* ==========================================================================
   Academy catalog — /academy landing with course cards
   ========================================================================== */

.academy-catalog .catalog-hero {
  max-width: 780px;
}

.academy-catalog .hero-title {
  font-family: var(--font-display);
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin: 18px 0 16px;
}

.academy-catalog .hero-sub {
  color: var(--text-muted);
  font-size: 17px;
  max-width: 62ch;
  margin-bottom: 24px;
}

.catalog-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  list-style: none;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 14px;
}

.catalog-hero-stats strong {
  color: var(--text);
  font-size: 18px;
  margin-right: 6px;
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 22px;
  align-items: stretch;
}

.catalog-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 26px 26px 22px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0));
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.catalog-card:hover {
  transform: translateY(-3px);
  border-color: rgba(155, 92, 246, 0.35);
  box-shadow: 0 20px 60px -30px rgba(155, 92, 246, 0.55);
}

.catalog-card-head h3 {
  font-family: var(--font-display);
  font-size: 22px;
  line-height: 1.25;
  margin: 6px 0 8px;
}

.catalog-card-head h3 a {
  color: inherit;
  text-decoration: none;
}

.catalog-card-eyebrow {
  display: inline-flex;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.catalog-card-flag {
  position: absolute;
  top: 20px;
  right: 22px;
  padding: 4px 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, #6d5ef2, #22d3ee);
  color: #0b0d17;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.catalog-card-head p {
  color: var(--text-muted);
  font-size: 14px;
  margin: 0;
}

.catalog-card-desc {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.55;
  margin: 0;
}

.catalog-card-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px 14px;
  margin: 0;
  padding: 14px 0;
  border-top: 1px dashed var(--border);
  border-bottom: 1px dashed var(--border);
}

.catalog-card-stats > div {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.catalog-card-stats dt {
  color: var(--text-muted);
  font-size: 12px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.catalog-card-stats dd {
  margin: 0;
  color: var(--text);
  font-weight: 600;
  font-size: 18px;
  font-family: var(--font-display);
}

.catalog-card-progress {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.catalog-progress-label {
  color: var(--text-muted);
  font-size: 13px;
}

.catalog-card-badges {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.catalog-card-badges .catalog-cert a {
  color: var(--text);
}

.catalog-card-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: auto;
}

.catalog-card-actions .btn {
  flex: 1;
  min-width: 140px;
  justify-content: center;
}

/* ==========================================================================
   Reading-only module tag (noQuiz)
   ========================================================================== */

.module-noquiz-tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px dashed var(--border);
  color: var(--text-muted);
  font-size: 12px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

/* ==========================================================================
   Dashboard — course panels
   ========================================================================== */

.dash-section {
  margin-top: 36px;
}

.dash-section-head {
  margin-bottom: 20px;
}

.dash-section-head .eyebrow {
  color: var(--text-muted);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.dash-section-head h2 {
  font-family: var(--font-display);
  font-size: 28px;
  line-height: 1.2;
  margin: 8px 0 6px;
}

.dash-section-head p {
  color: var(--text-muted);
  font-size: 15px;
  max-width: 62ch;
}

.dash-courses {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 22px;
}