:root {
  --bg: #06060a;
  --surface: rgba(14, 14, 22, 0.82);
  --surface-strong: #14141f;
  --border: rgba(255, 255, 255, 0.08);
  --text: #ececf6;
  --muted: #9d9db5;
  --accent: #7cffd4;
  --accent-2: #a78bfa;
  --accent-3: #ff6b6b;
  --shadow: 0 28px 70px rgba(0, 0, 0, 0.34);
  --radius: 28px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: "Cairo", sans-serif;
  line-height: 1.85;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='grain'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23grain)' opacity='0.12'/%3E%3C/svg%3E");
  pointer-events: none;
  opacity: 0.22;
}

.site-bg {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at top right, rgba(124, 255, 212, 0.14), transparent 24%),
    radial-gradient(circle at 18% 16%, rgba(167, 139, 250, 0.14), transparent 22%),
    linear-gradient(180deg, #05060a 0%, #090911 100%);
  z-index: -1;
}

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

.page-shell {
  width: min(1180px, calc(100% - 28px));
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.topbar {
  position: sticky;
  top: 16px;
  z-index: 20;
  margin-top: 16px;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(10, 10, 18, 0.72);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
}

.brand {
  color: var(--accent);
  font-family: "Space Mono", monospace;
  font-size: 0.92rem;
}

.nav {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.nav a {
  color: var(--muted);
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.nav a:hover,
.nav a.active {
  color: var(--accent);
}

.hero,
.section,
.footer {
  margin-top: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero {
  padding: 44px;
  display: grid;
  gap: 24px;
  position: relative;
}

.hero-home {
  grid-template-columns: minmax(0, 1.3fr) minmax(300px, 0.85fr);
  align-items: stretch;
}

.hero-page {
  grid-template-columns: 1fr;
  overflow: hidden;
}

.hero-page::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(124, 255, 212, 0.06), transparent 42%);
  pointer-events: none;
}

.hero h1,
.hero-page h1,
.section-heading h2 {
  margin: 0;
  line-height: 1.08;
}

.hero h1,
.hero-page h1 {
  font-size: clamp(2.3rem, 5vw, 4.9rem);
  max-width: 10ch;
}

.section-heading h2 {
  font-size: clamp(1.85rem, 4vw, 3rem);
}

.hero-text,
.page-intro,
.info-card p,
.track-card p,
.page-link-card p,
.resource-list li,
.mini-note,
.lesson-copy p,
.quiz-feedback,
.footer p,
.timeline-card p,
.resource-card p,
.glass-card p,
.metric-card span {
  color: var(--muted);
}

.hero-text,
.page-intro {
  max-width: 760px;
  margin: 18px 0 24px;
  font-size: 1.05rem;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-family: "Space Mono", monospace;
  font-size: 0.82rem;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-side,
.metric-grid,
.feature-grid,
.tracks-grid,
.lesson-layout,
.page-links-grid,
.resource-grid,
.timeline-grid,
.resource-list-grid {
  display: grid;
  gap: 18px;
}

.hero-side {
  grid-template-rows: auto 1fr;
}

.glass-card,
.metric-card,
.info-card,
.track-card,
.lesson-card,
.quiz-card,
.page-link-card,
.timeline-card,
.resource-card {
  border: 1px solid var(--border);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(19, 19, 31, 0.95), rgba(10, 10, 18, 0.88));
}

.glass-card,
.info-card,
.track-card,
.lesson-card,
.quiz-card,
.timeline-card,
.resource-card {
  padding: 24px;
}

.spotlight-card {
  background:
    radial-gradient(circle at top left, rgba(124, 255, 212, 0.12), transparent 42%),
    linear-gradient(180deg, rgba(19, 19, 31, 0.95), rgba(10, 10, 18, 0.88));
}

.panel-label {
  margin: 0 0 12px;
  color: var(--accent-2);
  font-family: "Space Mono", monospace;
}

.stack-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.stack-list span,
.tag {
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(124, 255, 212, 0.16);
  background: rgba(124, 255, 212, 0.08);
  color: var(--text);
  font-size: 0.94rem;
}

.metric-grid,
.feature-grid,
.page-links-grid,
.resource-grid,
.timeline-grid,
.resource-list-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.metric-card {
  padding: 18px;
  text-align: center;
}

.metric-card strong {
  display: block;
  font-size: 2rem;
  color: var(--accent);
}

.section {
  padding: 36px;
}

.inline-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
}

.text-link {
  color: var(--accent);
  font-family: "Space Mono", monospace;
  font-size: 0.88rem;
}

.info-card span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(124, 255, 212, 0.12);
  color: var(--accent);
  font-family: "Space Mono", monospace;
}

.accent-card {
  background:
    radial-gradient(circle at top right, rgba(124, 255, 212, 0.14), transparent 42%),
    linear-gradient(180deg, rgba(19, 19, 31, 0.95), rgba(10, 10, 18, 0.88));
}

.progress-wrap {
  margin-bottom: 22px;
  padding: 18px;
  border: 1px solid rgba(124, 255, 212, 0.16);
  border-radius: 20px;
  background: rgba(124, 255, 212, 0.05);
}

.progress-head {
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.progress-head span {
  color: var(--muted);
}

.progress-bar {
  height: 12px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
}

.progress-value {
  width: 20%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.35s ease;
}

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

.track-card {
  position: relative;
  overflow: hidden;
}

.track-card::after {
  content: "";
  position: absolute;
  width: 180px;
  height: 180px;
  left: -44px;
  bottom: -60px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124, 255, 212, 0.12), transparent 68%);
}

.track-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.track-top p {
  margin: 0;
  color: var(--accent-2);
  font-family: "Space Mono", monospace;
}

.status-badge {
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--muted);
  font-size: 0.9rem;
}

.status-badge.active {
  color: var(--accent);
  background: rgba(124, 255, 212, 0.12);
}

.track-card.locked {
  opacity: 0.58;
}

.track-card h3,
.info-card h3,
.page-link-card strong,
.timeline-card h3,
.resource-card h3,
.quiz-head h3 {
  margin: 14px 0 8px;
}

.lesson-layout {
  grid-template-columns: minmax(0, 1.12fr) minmax(320px, 0.88fr);
}

.lesson-copy .snippet {
  margin-top: 18px;
  padding: 16px;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: #090910;
  direction: ltr;
  text-align: left;
  font-family: "Space Mono", monospace;
  font-size: 0.88rem;
  white-space: pre-wrap;
}

.quiz-form {
  display: grid;
  gap: 14px;
}

.quiz-question {
  padding: 14px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.quiz-question p {
  margin: 0 0 12px;
  font-weight: 700;
}

.option {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 10px;
}

.option input {
  accent-color: var(--accent);
}

.quiz-feedback {
  min-height: 24px;
  margin: 14px 0 0;
}

.quiz-feedback.success {
  color: var(--accent);
}

.quiz-feedback.error {
  color: var(--accent-3);
}

.page-link-card {
  padding: 22px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-link-card:hover {
  transform: translateY(-4px);
  border-color: rgba(124, 255, 212, 0.22);
}

.resource-list {
  margin: 0;
  padding-right: 18px;
}

.timeline-card .timeline-step {
  display: inline-flex;
  margin-bottom: 12px;
  color: var(--accent);
  font-family: "Space Mono", monospace;
}

.btn {
  padding: 14px 20px;
  border-radius: 16px;
  border: 1px solid transparent;
  font: inherit;
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--accent);
  color: #03100c;
  font-weight: 800;
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn-secondary:disabled {
  opacity: 0.58;
  cursor: not-allowed;
  transform: none;
}

.full {
  width: 100%;
}

.footer {
  margin-bottom: 36px;
  padding: 24px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

@media (max-width: 980px) {
  .hero-home,
  .feature-grid,
  .tracks-grid,
  .lesson-layout,
  .page-links-grid,
  .resource-grid,
  .timeline-grid,
  .resource-list-grid,
  .metric-grid {
    grid-template-columns: 1fr;
  }

  .hero,
  .section {
    padding: 26px;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100% - 16px, 1180px);
  }

  .topbar,
  .footer,
  .inline-heading {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav {
    gap: 10px;
  }
}