:root {
  --bg: #05060c;
  --bg-soft: #080b15;
  --surface: #0d1220;
  --surface-2: #12192a;
  --surface-3: #192238;
  --text: #f7f8ff;
  --muted: #b0b8cf;
  --subtle: #7f89a5;
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);
  --lime: #c7f66e;
  --lime-soft: rgba(199, 246, 110, 0.12);
  --violet: #a68cff;
  --violet-soft: rgba(166, 140, 255, 0.12);
  --blue: #72cfff;
  --coral: #ff9d87;
  --danger: #ff8f82;
  --radius-xl: 24px;
  --radius-lg: 18px;
  --radius-md: 13px;
  --radius-sm: 9px;
  --sidebar: 272px;
  --topbar: 78px;
  font-family: "DM Sans", Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color-scheme: dark;
  font-synthesis: none;
}

*,
*::before,
*::after { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 82% -10%, rgba(116, 77, 255, 0.12), transparent 30rem),
    radial-gradient(circle at 38% 20%, rgba(199, 246, 110, 0.035), transparent 34rem),
    var(--bg);
  color: var(--text);
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, black, transparent 75%);
}
::selection { color: #10170a; background: var(--lime); }
button, input, select { font: inherit; }
button, a, input, select { touch-action: manipulation; }
button { color: inherit; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 3px;
}
img { max-width: 100%; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { font-family: "Space Grotesk", Inter, ui-sans-serif, system-ui, sans-serif; text-wrap: balance; }
h1 { font-size: clamp(38px, 4.3vw, 64px); line-height: 1.02; letter-spacing: -0.055em; margin-bottom: 20px; font-weight: 650; }
h2 { font-size: 26px; line-height: 1.15; letter-spacing: -0.035em; margin-bottom: 18px; }
h3 { font-size: 17px; line-height: 1.3; letter-spacing: -0.015em; margin-bottom: 10px; }
p { color: var(--muted); line-height: 1.75; font-size: 14px; text-wrap: pretty; }
.sr-only { position: absolute !important; width: 1px !important; height: 1px !important; overflow: hidden !important; clip: rect(0 0 0 0) !important; white-space: nowrap !important; clip-path: inset(50%) !important; }

.noise {
  position: fixed;
  inset: 0;
  z-index: 90;
  opacity: 0.018;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.7'/%3E%3C/svg%3E");
}
.skip-link {
  position: fixed;
  top: -70px;
  left: 20px;
  z-index: 200;
  padding: 11px 16px;
  border-radius: var(--radius-sm);
  background: var(--lime);
  color: #111a08;
  font-weight: 700;
  transition: top 0.18s ease;
}
.skip-link:focus { top: 14px; }
.app-shell { display: flex; min-height: 100vh; }

/* Sidebar */
.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 70;
  display: flex;
  width: var(--sidebar);
  padding: 25px max(18px, env(safe-area-inset-right)) 20px max(18px, env(safe-area-inset-left));
  flex-direction: column;
  overflow-y: auto;
  overscroll-behavior: contain;
  border-right: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(11, 14, 25, 0.98), rgba(6, 8, 15, 0.99));
  box-shadow: 18px 0 55px rgba(0, 0, 0, 0.18);
  scrollbar-width: thin;
  scrollbar-color: var(--surface-3) transparent;
}
.brand-wrap { display: flex; align-items: center; justify-content: space-between; padding: 0 9px; }
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-family: "Space Grotesk", sans-serif;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.045em;
}
.brand > span:last-child > span { color: var(--lime); }
.brand-cube {
  position: relative;
  display: inline-block;
  width: 28px;
  height: 28px;
  transform: rotate(-8deg);
  filter: drop-shadow(0 6px 12px rgba(199, 246, 110, 0.12));
}
.brand-cube i, .brand-cube b, .brand-cube em { position: absolute; width: 18px; height: 18px; border-radius: 3px; }
.brand-cube i { inset: 0 auto auto 0; background: var(--lime); }
.brand-cube b { inset: 0 0 auto auto; background: var(--violet); }
.brand-cube em { inset: auto auto 0 5px; background: var(--blue); }
.nav-label {
  margin: 38px 12px 11px;
  color: var(--subtle);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.2em;
}
.main-nav { display: grid; gap: 5px; }
.main-nav a, .small-link {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 43px;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: 11px;
  color: var(--muted);
  font-size: 13px;
  transition: color 0.18s ease, background 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}
.main-nav a:hover, .course-link:hover, .small-link:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.045);
  border-color: rgba(255, 255, 255, 0.06);
}
.main-nav a.active {
  color: var(--text);
  border-color: rgba(199, 246, 110, 0.12);
  background: linear-gradient(90deg, rgba(199, 246, 110, 0.11), rgba(199, 246, 110, 0.025));
  box-shadow: inset 3px 0 var(--lime);
}
.nav-symbol { width: 20px; color: var(--subtle); font-size: 18px; text-align: center; }
.main-nav a.active .nav-symbol { color: var(--lime); }
.nav-courses { display: grid; gap: 3px; margin-top: 22px; }
.course-link {
  display: flex;
  align-items: center;
  gap: 11px;
  min-height: 38px;
  padding: 8px 12px;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--muted);
  font-size: 12px;
  transition: color .18s ease, background-color .18s ease, border-color .18s ease, opacity .18s ease, transform .18s ease;
}
.course-dot { width: 8px; height: 8px; flex-shrink: 0; border-radius: 3px; box-shadow: 0 0 12px currentColor; transform: rotate(12deg); }
.sidebar-bottom { margin-top: auto; padding-top: 38px; }
.small-link { justify-content: space-between; padding-bottom: 15px; font-size: 12px; }
.streak {
  position: relative;
  display: flex;
  align-items: center;
  gap: 11px;
  overflow: hidden;
  padding: 14px;
  border: 1px solid rgba(166, 140, 255, 0.15);
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(166, 140, 255, 0.11), rgba(14, 18, 32, 0.9));
}
.streak::after { content: ""; position: absolute; right: -17px; bottom: -26px; width: 60px; height: 60px; border-radius: 50%; background: rgba(166, 140, 255, 0.14); filter: blur(12px); }
.streak > span { display: grid; place-items: center; width: 31px; height: 31px; flex-shrink: 0; border-radius: 9px; color: var(--coral); background: rgba(255, 157, 135, 0.11); }
.streak strong, .streak small { display: block; position: relative; z-index: 1; }
.streak strong { font-size: 12px; }
.streak small { margin-top: 4px; color: var(--subtle); font-size: 9px; line-height: 1.45; }
.menu-button, .sidebar-close { display: none; }
.sidebar-backdrop { display: none; }

/* Topbar and persistent Alleless CTA */
.page { width: calc(100% - var(--sidebar)); min-width: 0; margin-left: var(--sidebar); }
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: minmax(190px, 440px) auto;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: var(--topbar);
  padding: 0 clamp(24px, 4.2vw, 64px);
  border-bottom: 1px solid var(--border);
  background: rgba(5, 6, 12, 0.82);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.12);
  backdrop-filter: blur(22px) saturate(130%);
}
.search-wrap { display: flex; min-width: 0; align-items: center; gap: 10px; padding: 7px 10px; border: 1px solid transparent; border-radius: 11px; color: var(--subtle); transition: border-color .18s ease, background-color .18s ease, box-shadow .18s ease; }
.search-wrap:focus-within { border-color: rgba(114, 207, 255, .45); background: rgba(114, 207, 255, .055); box-shadow: 0 0 0 2px rgba(114, 207, 255, .1); }
.search-wrap > span { font-size: 19px; }
.search-wrap input { width: 100%; min-width: 0; border: 0; outline: 0; background: transparent; color: var(--text); font-size: 12px; }
.search-wrap input::placeholder { color: #747e99; }
kbd { flex-shrink: 0; padding: 3px 6px; border: 1px solid var(--border); border-radius: 6px; background: rgba(255, 255, 255, 0.035); color: var(--subtle); font-size: 9px; white-space: nowrap; }
.topbar-tools, .topbar-actions { display: flex; align-items: center; gap: 10px; }
.alleless-top {
  display: flex;
  align-items: center;
  gap: 9px;
  min-height: 43px;
  padding: 5px 11px 5px 6px;
  border: 1px solid rgba(199, 246, 110, 0.24);
  border-radius: 12px;
  background: linear-gradient(115deg, rgba(199, 246, 110, 0.13), rgba(166, 140, 255, 0.09));
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.045), 0 8px 25px rgba(0, 0, 0, 0.16);
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}
.alleless-top:hover { transform: translateY(-1px); border-color: rgba(199, 246, 110, 0.5); background: linear-gradient(115deg, rgba(199, 246, 110, 0.2), rgba(166, 140, 255, 0.13)); }
.alleless-top-mark {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  flex-shrink: 0;
  border-radius: 9px;
  background: var(--lime);
  color: #17200e;
  font-family: "Space Grotesk", sans-serif;
  font-size: 14px;
  font-weight: 800;
}
.alleless-top-copy { line-height: 1.05; }
.alleless-top-copy strong, .alleless-top-copy small { display: block; white-space: nowrap; }
.alleless-top-copy strong { font-family: "Space Grotesk", sans-serif; font-size: 11px; }
.alleless-top-copy small { margin-top: 4px; color: var(--subtle); font-size: 8px; letter-spacing: 0.04em; }
.alleless-top b { margin-left: 3px; color: var(--lime); font-size: 11px; }
.language-picker > span { color: var(--violet); font-size: 11px; }
.language-picker select { max-width: 49px; border: 0; outline: 0; appearance: none; background: transparent; color: var(--muted); font-size: 10px; font-weight: 700; cursor: pointer; }
.language-picker option { color: #10131d; }
.icon-button { display: grid; place-items: center; width: 36px; height: 36px; border: 0; border-radius: 10px; background: transparent; color: var(--muted); font-size: 19px; cursor: pointer; transition: 0.18s ease; }
.icon-button:hover { background: rgba(255, 255, 255, 0.055); color: var(--text); }
.icon-button.menu-button, .icon-button.sidebar-close { display: none; }

#main { max-width: 1480px; margin: 0 auto; padding: 46px clamp(24px, 4.2vw, 64px) 76px; scroll-margin-top: var(--topbar); }
.eyebrow { display: flex; align-items: center; gap: 8px; color: var(--lime); font-size: 10px; font-weight: 700; letter-spacing: 0.18em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 7px; height: 7px; border-radius: 2px; background: currentColor; transform: rotate(45deg); }

/* Home */
.hero {
  position: relative;
  min-height: 365px;
  overflow: hidden;
  padding: 55px clamp(26px, 4vw, 58px);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 80% 38%, rgba(166, 140, 255, 0.14), transparent 24rem),
    linear-gradient(135deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0.008));
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.035), 0 30px 90px rgba(0, 0, 0, 0.2);
}
.hero::before { content: ""; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(90deg, rgba(199, 246, 110, 0.045), transparent 30%); }
.hero > *:not(.hero-orbit) { position: relative; z-index: 2; }
.hero h1 { max-width: 690px; margin-top: 19px; }
.hero h1 em { color: var(--lime); font-style: normal; }
.hero p { max-width: 590px; font-size: 14px; }
.hero-orbit { position: absolute; right: 2%; top: 8px; width: 270px; height: 250px; perspective: 800px; pointer-events: none; }
.orbital-cube { position: absolute; top: 65px; left: 88px; width: 96px; height: 96px; transform: rotateX(-20deg) rotateY(35deg) rotateZ(4deg); transform-style: preserve-3d; animation: float-cube 5.5s ease-in-out infinite; }
.orbital-cube div { position: absolute; width: 96px; height: 96px; border: 1px solid rgba(255, 255, 255, 0.18); background: rgba(166, 140, 255, 0.055); }
.orbital-cube .front { transform: translateZ(48px); background: rgba(166, 140, 255, 0.12); }
.orbital-cube .back { transform: rotateY(180deg) translateZ(48px); }
.orbital-cube .right { transform: rotateY(90deg) translateZ(48px); background: rgba(114, 207, 255, 0.1); }
.orbital-cube .left { transform: rotateY(-90deg) translateZ(48px); background: rgba(199, 246, 110, 0.08); }
.orbital-cube .top { transform: rotateX(90deg) translateZ(48px); background: rgba(199, 246, 110, 0.1); }
.orbital-cube .bottom { transform: rotateX(-90deg) translateZ(48px); }
.orbit-ring { position: absolute; top: 72px; left: 8px; width: 245px; height: 124px; border: 1px solid rgba(166, 140, 255, 0.34); border-radius: 50%; transform: rotate(-24deg); }
.orbit-dot { position: absolute; top: 137px; left: 30px; width: 9px; height: 9px; border-radius: 50%; background: var(--lime); box-shadow: 0 0 25px var(--lime); }
@keyframes float-cube {
  0%, 100% { transform: translateY(0) rotateX(-20deg) rotateY(35deg) rotateZ(4deg); }
  50% { transform: translateY(-13px) rotateX(-12deg) rotateY(55deg) rotateZ(4deg); }
}
.continue-card {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  overflow: hidden;
  margin: 20px 0 13px;
  padding: 19px 22px;
  border: 1px solid rgba(199, 246, 110, 0.35);
  border-radius: var(--radius-md);
  background: linear-gradient(110deg, #c7f66e, #b7eb78);
  color: #17200e;
  box-shadow: 0 15px 45px rgba(152, 202, 74, 0.08);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.continue-card:hover { transform: translateY(-2px); box-shadow: 0 19px 50px rgba(152, 202, 74, 0.13); }
.continue-card::after { content: "↗"; position: absolute; right: 17%; font-size: 150px; line-height: 1; opacity: 0.08; }
.continue-card p { margin: 5px 0 0; color: #3c5422; font-size: 11px; }
.continue-card h2 { margin: 0 0 4px; font-size: 16px; }
.continue-copy { position: relative; z-index: 1; }
.continue-link { position: relative; z-index: 1; padding: 9px 13px; border-radius: 8px; background: #15200c; color: #ddfab0; font-size: 11px; font-weight: 700; white-space: nowrap; }
.session-notice { display: flex; align-items: center; gap: 11px; margin: 0 0 39px; padding: 10px 13px; border: 1px solid rgba(255, 255, 255, 0.065); border-radius: 10px; background: rgba(255, 255, 255, 0.022); color: var(--subtle); font-size: 10px; }
.session-notice strong { flex-shrink: 0; color: var(--lime); font-size: 9px; letter-spacing: 0.08em; text-transform: uppercase; }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 18px; }
.section-heading h2 { margin: 0; }
.text-link { color: var(--muted); font-size: 11px; transition: color 0.18s ease; }
.text-link:hover { color: var(--lime); }
.course-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.course-card {
  position: relative;
  display: flex;
  min-height: 270px;
  overflow: hidden;
  flex-direction: column;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0.012)), var(--surface);
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.025);
  transform-style: preserve-3d;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.course-card:hover { transform: perspective(900px) rotateX(3deg) rotateY(-3deg) translateY(-5px); border-color: color-mix(in srgb, var(--accent) 42%, transparent); box-shadow: 0 23px 55px rgba(0, 0, 0, 0.23); }
.course-card::before { content: ""; position: absolute; right: -48px; top: 35px; width: 145px; height: 145px; border-radius: 50%; background: var(--accent); filter: blur(70px); opacity: 0.13; }
.course-card::after { content: ""; position: absolute; right: 20px; bottom: 20px; width: 28px; height: 1px; background: linear-gradient(90deg, transparent, var(--accent)); opacity: 0.45; }
.course-icon { display: grid; place-items: center; width: 48px; height: 48px; margin-bottom: 25px; border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent); border-radius: 13px; background: color-mix(in srgb, var(--accent) 12%, transparent); color: var(--accent); font-size: 20px; font-weight: 700; transform: rotate(-4deg); transition: transform 0.2s ease; }
.course-card:hover .course-icon { transform: rotate(0) scale(1.04); }
.course-card h3 { margin-bottom: 8px; }
.course-card p { margin-bottom: 15px; font-size: 11px; }
.course-meta { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: auto; color: var(--muted); font-size: 10px; }
.course-levels { color: var(--subtle); }
.learn-banner, .alleless-cta { display: flex; align-items: center; justify-content: space-between; gap: 22px; margin-top: 28px; padding: 24px 27px; border: 1px solid rgba(166, 140, 255, 0.22); border-radius: var(--radius-lg); background: radial-gradient(circle at 90% 20%, rgba(166, 140, 255, 0.16), transparent 35%), linear-gradient(120deg, #10142a, #0c1120); }
.learn-banner h3, .alleless-cta h2 { margin-bottom: 5px; }
.learn-banner p, .alleless-cta p { margin: 0; font-size: 11px; }
.alleless-cta { border-color: rgba(199, 246, 110, 0.22); background: radial-gradient(circle at 90% 20%, rgba(199, 246, 110, 0.13), transparent 34%), linear-gradient(120deg, #101722, #0c1120); }
.alleless-cta h2 { margin-top: 8px; font-size: 22px; }
.button { display: inline-flex; min-height: 40px; align-items: center; justify-content: center; gap: 7px; padding: 10px 14px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface-2); color: var(--text); font-size: 11px; font-weight: 700; cursor: pointer; transition: transform 0.18s ease, border-color 0.18s ease, filter 0.18s ease; }
.button:hover { transform: translateY(-1px); filter: brightness(1.08); }
.button.primary { border-color: var(--lime); background: var(--lime); color: #17200e; }
footer { display: flex; justify-content: space-between; gap: 20px; margin-top: 45px; padding-top: 22px; border-top: 1px solid var(--border); color: var(--subtle); font-size: 9px; }

/* Catalogue and course curriculum */
.page-head { margin: 4px 0 29px; }
.page-head h1 { margin: 13px 0 9px; font-size: 40px; }
.page-head p { max-width: 680px; }
.pill { display: inline-flex; align-items: center; gap: 5px; padding: 5px 9px; border: 1px solid var(--border); border-radius: 999px; background: rgba(255, 255, 255, 0.04); color: var(--muted); font-size: 9px; white-space: nowrap; }
.pill.green { border-color: rgba(199, 246, 110, 0.19); background: rgba(199, 246, 110, 0.07); color: var(--lime); }
.toolbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin: 25px 0 21px; }
.filters { display: flex; flex-wrap: wrap; gap: 8px; }
.filter-button { padding: 8px 11px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface); color: var(--muted); font-size: 10px; cursor: pointer; transition: 0.18s ease; }
.filter-button:hover { border-color: var(--border-strong); color: var(--text); }
.filter-button.active { border-color: var(--lime); background: var(--lime); color: #111a08; font-weight: 700; }
.page-number { color: var(--subtle); font-size: 10px; white-space: nowrap; }
.pagination { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 7px; margin-top: 20px; }
.page-button { display: grid; place-items: center; min-width: 36px; height: 36px; padding: 0 10px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface); color: var(--muted); font-size: 11px; cursor: pointer; transition: color .18s ease, background-color .18s ease, border-color .18s ease, transform .18s ease; }
.page-button:hover:not(:disabled) { transform: translateY(-1px); border-color: var(--border-strong); color: var(--text); }
.page-button.active { border-color: var(--lime); background: var(--lime); color: #111a08; font-weight: 700; }
.page-button:disabled { opacity: .35; cursor: not-allowed; }
.page-summary { margin-left: 4px; color: var(--subtle); font-size: 10px; font-variant-numeric: tabular-nums; }
.lesson-list { overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--surface); }
.lesson-row { display: grid; grid-template-columns: 40px minmax(0, 1fr) auto; align-items: center; gap: 15px; padding: 16px 18px; border-bottom: 1px solid rgba(255, 255, 255, 0.065); background: rgba(13, 18, 32, 0.85); content-visibility: auto; contain-intrinsic-size: auto 72px; transition: background 0.18s ease, padding-left 0.18s ease; }
.lesson-row:last-child { border-bottom: 0; }
.lesson-row:hover { padding-left: 22px; background: var(--surface-2); }
.lesson-number { display: grid; place-items: center; width: 31px; height: 31px; border: 1px solid var(--border); border-radius: 9px; color: var(--muted); font-size: 9px; font-variant-numeric: tabular-nums; }
.lesson-row.done .lesson-number { border-color: rgba(199, 246, 110, 0.32); background: var(--lime-soft); color: var(--lime); }
.lesson-row :is(h2, h3) { margin: 0 0 4px; font-family: "DM Sans", sans-serif; font-size: 12px; letter-spacing: 0; }
.lesson-row p { display: -webkit-box; overflow: hidden; margin: 0; color: var(--muted); font-size: 10px; line-height: 1.5; -webkit-box-orient: vertical; -webkit-line-clamp: 1; }
.lesson-tags { display: flex; align-items: center; }
.lesson-tags .pill { border-color: color-mix(in srgb, var(--accent) 24%, transparent); color: var(--accent); }
.empty-state { padding: 52px 20px; border: 1px dashed var(--border-strong); border-radius: var(--radius-md); text-align: center; }
.empty-state .empty-icon { display: block; margin-bottom: 13px; color: var(--subtle); font-size: 34px; }
.course-hero-card { margin-top: 22px; padding: 27px; overflow: hidden; border: 1px solid color-mix(in srgb, var(--accent) 22%, var(--border)); border-radius: var(--radius-lg); background: radial-gradient(circle at 90% 0, color-mix(in srgb, var(--accent) 12%, transparent), transparent 25rem), var(--surface); }
.path-top { display: flex; align-items: flex-start; gap: 15px; }
.path-top .course-icon { margin: 0; flex-shrink: 0; }
.path-top h1, .path-top h2 { margin: 8px 0 5px; font-size: 28px; }
.path-top p { margin: 0; font-size: 11px; }
.course-progress-summary { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; margin: 24px 0 15px; }
.course-progress-summary > div { padding: 12px 13px; border: 1px solid rgba(255, 255, 255, 0.07); border-radius: 10px; background: rgba(255, 255, 255, 0.025); }
.course-progress-summary strong, .course-progress-summary small { display: block; }
.course-progress-summary strong { font-family: "Space Grotesk", sans-serif; font-size: 19px; font-variant-numeric: tabular-nums; }
.course-progress-summary small { margin-top: 3px; color: var(--subtle); font-size: 9px; }
.course-progress { height: 4px; overflow: hidden; border-radius: 999px; background: rgba(255, 255, 255, 0.07); }
.course-progress.wide { margin-bottom: 20px; }
.course-progress i { display: block; height: 100%; border-radius: inherit; background: var(--accent, var(--lime)); }
.course-hero-actions { display: flex; flex-wrap: wrap; gap: 9px; }
.curriculum-nav { position: sticky; top: calc(var(--topbar) + 10px); z-index: 12; display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin: 18px 0 32px; padding: 8px; border: 1px solid var(--border); border-radius: 14px; background: rgba(10, 14, 25, 0.87); box-shadow: 0 12px 30px rgba(0, 0, 0, 0.18); backdrop-filter: blur(15px); }
.curriculum-nav button { display: flex; align-items: center; gap: 8px; padding: 8px 10px; border: 1px solid transparent; border-radius: 9px; background: transparent; color: var(--muted); text-align: left; cursor: pointer; }
.curriculum-nav button:hover { border-color: var(--border); background: rgba(255, 255, 255, 0.045); color: var(--text); }
.curriculum-nav span { color: var(--subtle); font-size: 8px; }
.curriculum-nav b { font-size: 10px; }
.curriculum-stage { margin-top: 29px; scroll-margin-top: calc(var(--topbar) + 84px); }
.stage-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 13px; padding: 0 3px; }
.stage-heading span { color: var(--lime); font-family: "Space Grotesk", sans-serif; font-size: 9px; letter-spacing: 0.14em; }
.stage-heading h2 { margin: 4px 0 3px; font-size: 20px; }
.stage-heading p { margin: 0; font-size: 10px; }
.stage-heading > strong { color: var(--subtle); font-family: "Space Grotesk", sans-serif; font-size: 11px; font-variant-numeric: tabular-nums; white-space: nowrap; }

/* Guided path */
.guided-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; margin: 25px 0 35px; }
.guided-card { position: relative; overflow: hidden; padding: 23px; border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent); border-radius: var(--radius-lg); background: linear-gradient(145deg, color-mix(in srgb, var(--accent) 8%, var(--surface)), var(--surface)); }
.guided-card::after { content: ""; position: absolute; right: -22px; bottom: -34px; width: 90px; height: 90px; border: 1px solid color-mix(in srgb, var(--accent) 20%, transparent); border-radius: 24px; transform: rotate(25deg); }
.guided-card > span { color: var(--accent); font-family: "Space Grotesk", sans-serif; font-size: 27px; font-weight: 650; }
.guided-card h2 { margin: 16px 0 7px; font-size: 20px; }
.guided-card p { margin: 0; font-size: 11px; }
.roadmap { margin-top: 10px; }
.roadmap-track { display: grid; grid-template-columns: repeat(4, 1fr); gap: 9px; }
.roadmap-item { display: flex; align-items: center; gap: 11px; padding: 15px; border: 1px solid var(--border); border-radius: 13px; background: var(--surface);  transition: color .2s ease, background-color .2s ease, border-color .2s ease, transform .2s ease; }
.roadmap-item:hover { transform: translateY(-2px); border-color: color-mix(in srgb, var(--accent) 38%, transparent); background: var(--surface-2); }
.roadmap-dot { display: grid; place-items: center; width: 31px; height: 31px; flex-shrink: 0; border-radius: 9px; background: color-mix(in srgb, var(--accent) 12%, transparent); color: var(--accent); font-size: 9px; }
.roadmap-item strong, .roadmap-item small { display: block; }
.roadmap-item strong { font-size: 11px; }
.roadmap-item small { margin-top: 4px; color: var(--subtle); font-size: 8px; }
.roadmap-item b { margin-left: auto; color: var(--subtle); font-weight: 400; }
.project-callout { display: flex; align-items: flex-start; gap: 18px; margin-top: 26px; padding: 25px; border: 1px solid rgba(166, 140, 255, 0.24); border-radius: var(--radius-lg); background: linear-gradient(120deg, rgba(166, 140, 255, 0.09), var(--surface)); }
.project-callout .course-icon { margin: 0; background: var(--violet-soft); color: var(--violet); }
.project-callout h2 { margin: 2px 0 7px; font-size: 20px; }
.project-callout p { margin: 0 0 16px; font-size: 11px; }
.project-links { display: flex; flex-wrap: wrap; gap: 8px; }

/* Lesson */
.lesson-layout { display: grid; grid-template-columns: minmax(0, 1fr) 285px; align-items: start; gap: 27px; }
.lesson-layout > *, .lesson-title, .lesson-actions, .lesson-content, .lesson-side { min-width: 0; }
.lesson-breadcrumb { display: flex; align-items: center; flex-wrap: wrap; gap: 7px; margin: 1px 0 22px; color: var(--subtle); font-size: 9px; }
.lesson-breadcrumb a:hover { color: var(--text); }
.lesson-title .course-chip { display: inline-flex; align-items: center; gap: 7px; color: var(--accent); font-size: 10px; }
.lesson-title h1 { margin: 12px 0 13px; font-size: clamp(30px, 3.3vw, 47px); }
.lesson-title > p { max-width: 790px; font-size: 14px; }
.lesson-actions { display: flex; gap: 9px; margin: 21px 0 25px; }
.lesson-content { padding: 29px; border: 1px solid var(--border); border-radius: var(--radius-lg); background: rgba(13, 18, 32, 0.94); box-shadow: inset 0 1px rgba(255, 255, 255, 0.025), 0 25px 65px rgba(0, 0, 0, 0.13); }
.lesson-content h2 { margin: 32px 0 11px; font-size: 20px; }
.lesson-content h2:first-child { margin-top: 0; }
.lesson-content p { color: #c2c9dd; font-size: 13px; }
.lesson-content strong { color: var(--text); }
.lesson-content ul { padding-left: 20px; color: #c2c9dd; font-size: 13px; line-height: 1.85; }
.callout { margin: 21px 0; padding: 14px 16px; border: 1px solid rgba(199, 246, 110, 0.11); border-left: 3px solid var(--lime); border-radius: 0 11px 11px 0; background: rgba(199, 246, 110, 0.055); }
.callout p { margin: 0; color: #d5e8bd; font-size: 12px; }
.code-window { overflow: hidden; margin: 20px 0; border: 1px solid rgba(255, 255, 255, 0.09); border-radius: 13px; background: #070a13; box-shadow: 0 18px 45px rgba(0, 0, 0, 0.24); }
.code-topbar { display: flex; align-items: center; justify-content: space-between; padding: 10px 13px; border-bottom: 1px solid var(--border); background: #111729; color: var(--muted); font-size: 9px; }
.window-dots { display: flex; gap: 5px; }
.window-dots i { width: 7px; height: 7px; border-radius: 50%; background: #ef6c67; }
.window-dots i:nth-child(2) { background: #e7b55c; }
.window-dots i:nth-child(3) { background: #6dcb82; }
.copy-code { padding: 4px 6px; border: 0; border-radius: 5px; background: transparent; color: var(--muted); font-size: 9px; cursor: pointer; }
.copy-code:hover { background: rgba(255, 255, 255, 0.055); color: var(--text); }
pre { margin: 0; overflow-x: auto; padding: 19px; }
code { color: #dbe1f0; font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; font-size: 11px; line-height: 1.8; }
.lesson-side { position: sticky; top: calc(var(--topbar) + 18px); }
.progress-card, .outline-card, .next-card { padding: 18px; border: 1px solid var(--border); border-radius: 13px; background: var(--surface); }
.progress-heading { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.progress-heading h2, .outline-card h2 { margin: 0; font-family: "DM Sans", sans-serif; font-size: 10px; letter-spacing: 0; }
.progress-heading span { color: var(--accent); font-size: 8px; }
.progress-number { margin: 17px 0 9px; font-family: "Space Grotesk", sans-serif; font-size: 28px; font-variant-numeric: tabular-nums; }
.progress-number small { color: var(--subtle); font-family: "DM Sans", sans-serif; font-size: 11px; }
.side-note { margin: 8px 0 0; color: var(--muted); font-size: 9px; line-height: 1.55; }
.outline-card { margin-top: 13px; }
.outline-card a { display: block; padding: 9px 0; border-bottom: 1px solid rgba(255, 255, 255, 0.06); color: var(--muted); font-size: 9px; line-height: 1.45; }
.outline-card a:last-child { border: 0; }
.outline-card a:hover { color: var(--text); }
.next-card { margin-top: 13px; background: linear-gradient(125deg, #192038, #101625); }
.next-card h2 { font-family: "DM Sans", sans-serif; font-size: 10px; letter-spacing: 0; }
.next-card p { margin-bottom: 11px; font-size: 9px; }
.next-card a { color: var(--violet); font-size: 10px; }
.mark-complete { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-top: 27px; padding-top: 21px; border-top: 1px solid var(--border); }
.mark-complete small { color: var(--subtle); font-size: 10px; }

/* About */
.prose-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 23px; }
.steps { display: grid; gap: 12px; }
.step { display: flex; gap: 13px; padding: 18px; border: 1px solid var(--border); border-radius: 13px; background: var(--surface); }
.step-num { display: grid; place-items: center; width: 29px; height: 29px; flex-shrink: 0; border-radius: 8px; background: var(--lime-soft); color: var(--lime); font-size: 10px; font-weight: 700; }
.step h2 { margin: 0 0 5px; font-size: 12px; }
.step p { margin: 0; font-size: 10px; }
.tip-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 22px; }
.tip { padding: 20px; border: 1px solid var(--border); border-radius: 13px; background: var(--surface); }
.tip > span { color: var(--lime); font-size: 20px; }
.tip h2 { margin-top: 11px; font-size: 13px; }
.tip p { margin: 0; font-size: 10px; }

/* Search, toast */
#search-overlay[hidden] { display: none; }
.search-overlay { position: fixed; inset: 0; z-index: 110; padding: 13vh 5% 0; background: rgba(2, 3, 8, 0.82); backdrop-filter: blur(10px); overscroll-behavior: contain; }
.search-box-large { max-width: 680px; margin: auto; overflow: hidden; border: 1px solid var(--border-strong); border-radius: 17px; background: var(--surface); box-shadow: 0 35px 100px rgba(0, 0, 0, 0.6); }
.search-input-row { display: flex; align-items: center; gap: 11px; padding: 0 14px 0 20px; border-bottom: 1px solid var(--border); transition: border-color .18s ease, box-shadow .18s ease; }
.search-input-row:focus-within { border-color: rgba(114, 207, 255, .55); box-shadow: inset 0 -2px rgba(114, 207, 255, .18); }
.search-input-row > span { color: var(--subtle); font-size: 20px; }
.search-input-row input { width: 100%; min-width: 0; padding: 21px 0; border: 0; outline: 0; background: transparent; color: var(--text); font-size: 16px; }
.search-close { display: grid; place-items: center; width: 34px; height: 34px; flex-shrink: 0; border: 1px solid var(--border); border-radius: 9px; background: var(--surface-2); color: var(--muted); font-size: 20px; cursor: pointer; }
.search-close:hover { color: var(--text); border-color: var(--border-strong); }
.search-box-results { max-height: 55vh; overflow: auto; overscroll-behavior: contain; }
.search-box-results .lesson-row { display: block; margin: 8px; padding: 14px; border: 1px solid var(--border); border-radius: 11px; background: var(--surface-2); }
.search-all { display: flex; align-items: center; justify-content: space-between; margin: 8px; padding: 12px 14px; border: 1px solid rgba(199, 246, 110, .2); border-radius: 10px; background: var(--lime-soft); color: var(--lime); font-size: 11px; font-weight: 700; }
.search-all:hover { border-color: rgba(199, 246, 110, .42); }
.search-hint { margin: 0; padding: 18px; color: var(--subtle); font-size: 10px; }
.toast { position: fixed; bottom: max(24px, env(safe-area-inset-bottom)); left: 50%; z-index: 130; max-width: min(90vw, 520px); padding: 12px 17px; transform: translate(-50%, 18px); border: 1px solid rgba(199, 246, 110, 0.27); border-radius: 11px; background: #1b2513; color: #dcf7b6; box-shadow: 0 15px 45px rgba(0, 0, 0, 0.45); font-size: 11px; opacity: 0; pointer-events: none; transition: opacity .22s ease, transform .22s ease; }
.toast.visible { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 1250px) {
  .course-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .course-card { min-height: 235px; }
  .hero-orbit { right: -5%; opacity: 0.55; }
  .lesson-layout { grid-template-columns: minmax(0, 1fr) 250px; }
  .roadmap-track { grid-template-columns: repeat(2, 1fr); }
  .topbar { grid-template-columns: minmax(170px, 360px) auto; }
}
@media (max-width: 1050px) {
  :root { --sidebar: 252px; }
  .alleless-top-copy small { display: block; }
  .topbar { padding-inline: 28px; }
  #main { padding-inline: 28px; }
  .curriculum-nav { grid-template-columns: repeat(2, 1fr); }
  .lesson-layout { grid-template-columns: 1fr; }
  .lesson-side { position: static; display: grid; grid-template-columns: repeat(2, 1fr); gap: 13px; }
  .outline-card { display: none; }
  .next-card { margin-top: 0; }
}
@media (max-width: 850px) {
  :root { --topbar: 70px; }
  .sidebar { transform: translateX(-102%); transition: transform 0.24s ease; box-shadow: 20px 0 60px rgba(0, 0, 0, 0.55); }
  .sidebar.open { transform: translateX(0); }
  .page { width: 100%; margin-left: 0; }
  .icon-button.menu-button, .icon-button.sidebar-close { display: grid; }
  .topbar { grid-template-columns: auto minmax(120px, 1fr) auto; }
  .sidebar-backdrop { position: fixed; inset: 0; z-index: 60; display: block; border: 0; background: rgba(2, 3, 8, 0.65); opacity: 0; visibility: hidden; pointer-events: none; transition: opacity 0.2s ease, visibility 0.2s ease; }
  body.sidebar-open { overflow: hidden; }
  body.sidebar-open .sidebar-backdrop { opacity: 1; visibility: visible; pointer-events: auto; }
  .topbar { padding-left: max(20px, env(safe-area-inset-left)); padding-right: max(20px, env(safe-area-inset-right)); }
  #main { padding: 31px max(20px, env(safe-area-inset-right)) 60px max(20px, env(safe-area-inset-left)); }
  .hero { min-height: 340px; }
  .hero-orbit { right: -15%; opacity: 0.34; }
}
@media (max-width: 720px) {
  .topbar { grid-template-columns: auto minmax(90px, 1fr) auto; gap: 9px; padding-left: max(14px, env(safe-area-inset-left)); padding-right: max(14px, env(safe-area-inset-right)); }
  .search-wrap kbd { display: none; }
  .topbar-actions { gap: 4px; }
  .alleless-top { min-height: 40px; padding: 4px 8px 4px 5px; }
  .alleless-top-mark { width: 28px; height: 28px; }
  .alleless-top-copy strong { font-size: 10px; }
  .alleless-top b { display: none; }
  .language-picker { height: 36px; padding-inline: 6px; }
  .topbar-actions .icon-button { display: none; }
  .guided-grid, .roadmap-track { grid-template-columns: 1fr; }
  .prose-grid, .tip-grid { grid-template-columns: 1fr; }
  .hero { min-height: 330px; padding: 42px 25px; }
  .hero-orbit { right: -24%; top: 70px; opacity: 0.25; }
  .hero p { position: relative; z-index: 4; max-width: 78%; }
  .continue-card, .learn-banner, .alleless-cta, .project-callout { align-items: flex-start; flex-direction: column; }
  .continue-card::after { right: 1%; }
  .section-heading { align-items: flex-start; flex-direction: column; gap: 7px; }
  .page-head h1 { font-size: 34px; }
  .toolbar { align-items: flex-start; flex-direction: column; }
  .course-grid { grid-template-columns: 1fr; }
  .course-card { min-height: 220px; }
  .curriculum-nav { grid-template-columns: 1fr 1fr; top: calc(var(--topbar) + 7px); }
  .curriculum-nav button { padding: 7px; }
  .curriculum-nav b { font-size: 9px; }
  .stage-heading { align-items: flex-start; }
  .stage-heading p { max-width: 78%; }
  .lesson-row { grid-template-columns: 31px minmax(0, 1fr) auto; gap: 10px; padding: 14px 12px; }
  .lesson-row:hover { padding-left: 14px; }
  .lesson-tags .pill { display: none; }
  .lesson-content { padding: 21px 17px; }
  .lesson-side { grid-template-columns: 1fr; }
  .next-card { display: none; }
  footer { flex-direction: column; gap: 6px; }
}
@media (max-width: 520px) {
  .topbar { grid-template-columns: auto minmax(55px, 1fr) auto; gap: 6px; padding-left: max(10px, env(safe-area-inset-left)); padding-right: max(10px, env(safe-area-inset-right)); }
  .menu-button { width: 34px; }
  .search-wrap { gap: 5px; padding-inline: 6px; }
  .search-wrap > span { font-size: 15px; }
  .search-wrap input::placeholder { color: #747e99; }
  .search-wrap input { font-size: 10px; }
  .alleless-top { gap: 5px; padding-right: 7px; }
  .alleless-top-mark { width: 26px; height: 26px; border-radius: 7px; font-size: 12px; }
  .alleless-top-copy strong { font-size: 9px; }
  .alleless-top-copy small { font-size: 7px; }
  .language-picker > span { display: none; }
  .language-picker select { max-width: 35px; }
  .hero { min-height: 350px; padding: 38px 21px; }
  .hero h1 { font-size: 39px; }
  .hero p { max-width: 92%; font-size: 12px; }
  .hero-orbit { right: -37%; top: 110px; opacity: 0.22; }
  .continue-card { padding: 17px; }
  .session-notice { align-items: flex-start; flex-direction: column; gap: 4px; }
  .course-hero-card { padding: 20px; }
  .path-top h1, .path-top h2 { font-size: 24px; }
  .course-progress-summary { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 6px; }
  .course-progress-summary > div { padding: 10px 8px; }
  .course-progress-summary strong { font-size: 16px; }
  .course-progress-summary small { font-size: 7px; }
  .curriculum-nav { display: flex; overflow-x: auto; scroll-snap-type: x mandatory; }
  .curriculum-nav button { min-width: 125px; scroll-snap-align: start; }
  .stage-heading p { max-width: 72%; }
  .lesson-title h1 { font-size: 31px; }
  .lesson-actions .button { width: 100%; }
  .lesson-content { padding: 19px 15px; border-radius: 14px; }
  .code-topbar > span:nth-child(2) { max-width: 130px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  pre { padding: 15px; }
  .mark-complete { align-items: stretch; flex-direction: column; }
  .project-links { width: 100%; }
  .project-links .button { flex: 1 1 42%; }
  .toast { bottom: 14px; }
}
/* Code library */
.code-library-cta {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 17px;
  overflow: hidden;
  margin-top: 17px;
  padding: 18px 21px;
  border: 1px solid rgba(114, 207, 255, .2);
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at 92% 20%, rgba(114, 207, 255, .12), transparent 25rem), linear-gradient(120deg, rgba(166, 140, 255, .08), rgba(14, 20, 35, .9));
  transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}
.code-library-cta h2 { margin: 3px 0 3px; font-size: 17px; }
.code-library-cta p { margin: 0; font-size: 10px; }
.code-library-cta .eyebrow { font-size: 8px; }
.code-library-stat strong, .code-library-stat span { display: block; }
.code-library-stat strong { color: var(--blue); font: 650 22px "Space Grotesk", sans-serif; }
.code-library-stat span { color: var(--subtle); font-size: 8px; }
.code-library-cta > b { color: var(--blue); font-size: 18px; }
.code-library-hero::after { content: ""; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(105deg, transparent 38%, rgba(114, 207, 255, .045) 50%, transparent 62%); transform: translateX(-120%); animation: scan-line 10s ease-in-out infinite; }
.code-hero-copy h1 { max-width: 650px; margin: 15px 0 14px; font-size: clamp(39px, 4.8vw, 66px); }
.code-hero-copy > p { max-width: 650px; margin-bottom: 23px; font-size: 13px; }
.code-visual-top > span { display: flex; gap: 5px; }
.code-visual-top i { width: 7px; height: 7px; border-radius: 50%; background: #ef6c67; }
.code-visual-top i:nth-child(2) { background: #e7b55c; }
.code-visual-top i:nth-child(3) { background: #6dcb82; }
.code-visual-top b { font-weight: 500; }
.code-visual-top em { margin-left: auto; color: var(--lime); font-style: normal; }
.code-visual-body small { display: flex; gap: 12px; color: #64718b; }
.code-visual-body small span { color: var(--violet); }
.code-visual-body code { color: #ced6e9; }
.code-visual-body code i { color: var(--violet); font-style: normal; }
.code-visual-body code strong { color: var(--blue); font-weight: 500; }
.code-visual-body code mark { background: transparent; color: var(--lime); }
.code-metrics article { min-width: 0; padding: 17px; border: 1px solid var(--border); border-radius: 14px; background: linear-gradient(145deg, rgba(255, 255, 255, .035), rgba(255, 255, 255, .008)), rgba(13, 18, 32, .86); }
.code-metrics span, .code-metrics strong, .code-metrics small { display: block; }
.code-metrics span { color: var(--subtle); font-size: 8px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.code-metrics strong { margin: 8px 0 3px; color: var(--text); font: 650 24px "Space Grotesk", sans-serif; }
.code-metrics small { color: var(--subtle); font-size: 9px; line-height: 1.45; }
.code-progress i { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--blue), var(--violet)); }
.code-library-heading h2 { margin: 8px 0 5px; font-size: 28px; }
.code-library-heading p { max-width: 660px; margin: 0; font-size: 10px; }
.code-library-search input { width: 100%; min-width: 0; border: 0; outline: 0; background: transparent; color: var(--text); font-size: 11px; }
.code-library-filter.active { border-color: rgba(114, 207, 255, .45); background: rgba(114, 207, 255, .11); color: var(--blue); }
.code-results-summary strong { color: var(--muted); font-size: 10px; }
.code-results-summary span { color: var(--subtle); font-size: 9px; }
.code-card::before { content: ""; position: absolute; top: 16px; bottom: 16px; left: 0; width: 2px; border-radius: 2px; background: var(--code-accent); opacity: .45; }
.template-browser-bar > span { display: flex; gap: 4px; }
.template-browser-bar i { width: 6px; height: 6px; border-radius: 50%; background: #ef6c67; }
.template-browser-bar i:nth-child(2) { background: #e7b55c; }
.template-browser-bar i:nth-child(3) { background: #6dcb82; }
.template-browser-bar small { overflow: hidden; color: var(--subtle); font: 8px "SFMono-Regular", Consolas, monospace; text-overflow: ellipsis; white-space: nowrap; }
.template-browser-bar em { margin-left: auto; color: var(--code-accent); font: normal 7px "Space Grotesk", sans-serif; letter-spacing: .08em; text-transform: uppercase; }
.template-preview-shell iframe { display: block; width: 100%; height: 330px; border: 0; background: #070910; }
.template-source > summary { display: flex; align-items: center; justify-content: space-between; padding: 10px 11px; color: var(--muted); font-size: 9px; cursor: pointer; list-style: none; }
.template-source > summary::-webkit-details-marker { display: none; }
.template-source > summary:hover { color: var(--code-accent); }
.template-source[open] > summary { border-bottom: 1px solid var(--border); color: var(--code-accent); }
.template-source[open] > summary span { transform: rotate(45deg); }
.template-source .mini-code-window { margin: 10px; border-radius: 8px; }
.template-source .mini-code-window pre { max-height: 300px; }
.template-source .mini-code-window code { white-space: pre; }
.code-card-tags span { padding: 4px 6px; border: 1px solid color-mix(in srgb, var(--code-accent) 20%, transparent); border-radius: 6px; background: color-mix(in srgb, var(--code-accent) 7%, transparent); color: var(--code-accent); font-size: 7px; font-weight: 700; letter-spacing: .07em; text-transform: uppercase; }
.code-card-title > span { color: var(--code-accent); font: 650 17px "Space Grotesk", sans-serif; }
.code-card-title h2 { margin: 0 0 5px; font-size: 14px; }
.code-card-title p { display: -webkit-box; overflow: hidden; margin: 0; font-size: 9px; line-height: 1.55; -webkit-box-orient: vertical; -webkit-line-clamp: 2; }
.mini-code-window > div { display: flex; align-items: center; gap: 8px; padding: 8px 10px; border-bottom: 1px solid rgba(255, 255, 255, .065); background: #101728; }
.mini-code-window > div > span { display: flex; gap: 4px; }
.mini-code-window > div i { width: 6px; height: 6px; border-radius: 50%; background: #ef6c67; }
.mini-code-window > div i:nth-child(2) { background: #e7b55c; }
.mini-code-window > div i:nth-child(3) { background: #6dcb82; }
.mini-code-window small { color: var(--subtle); font: 8px "SFMono-Regular", Consolas, monospace; }
.mini-code-window em { margin-left: auto; color: #64718b; font: normal 7px "SFMono-Regular", Consolas, monospace; }
.mini-code-window pre { max-height: 220px; margin: 0; overflow: auto; padding: 14px; }
.mini-code-window code { display: block; width: max-content; min-width: 100%; color: #cdd5e8; font-size: 9px; line-height: 1.7; }
.code-card-footer a { color: var(--code-accent); }
.code-empty > span { display: block; margin-bottom: 9px; color: var(--subtle); font-size: 28px; }
.code-empty h2 { margin: 0 0 6px; font-size: 17px; }
.code-empty p { margin: 0; font-size: 10px; }
.code-integrity > span { display: grid; place-items: center; width: 35px; height: 35px; flex-shrink: 0; border: 1px solid rgba(199, 246, 110, .25); border-radius: 11px; background: var(--lime-soft); color: var(--lime); }
.code-integrity > div { min-width: 0; margin-right: auto; }
.code-integrity h2 { margin: 0 0 4px; font-size: 14px; }
.code-integrity p { margin: 0; font-size: 9px; }
@keyframes code-float { 0%, 100% { transform: translateY(0) rotate(-2deg); } 50% { transform: translateY(-9px) rotate(2deg); } }
@media (max-width: 1250px) {
  .code-library-hero { grid-template-columns: minmax(0, 1fr) minmax(320px, .85fr); }
  .code-card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 850px) {
  .code-library-cta { grid-template-columns: auto minmax(0, 1fr) auto; }
  .code-library-stat { display: none; }
  .code-library-hero { grid-template-columns: 1fr; }
  .code-hero-visual { width: min(100%, 560px); transform: none; }
  .code-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .code-card-grid { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .code-library-heading { align-items: stretch; flex-direction: column; }
  .code-library-search { width: 100%; }
  .code-results-summary { align-items: flex-start; flex-direction: column; gap: 3px; }
  .code-integrity { align-items: flex-start; flex-direction: column; }
  .code-integrity .button { width: 100%; }
}
@media (max-width: 420px) {
  .code-library-hero { padding: 25px 19px; }
  .code-hero-copy h1 { font-size: 37px; }
  .code-hero-visual { min-height: 255px; }
  .code-visual-body { padding: 24px 17px 28px; font-size: 9px; }
  .code-float { min-width: 56px; padding: 7px 8px; font-size: 8px; }
  .code-library-catalog { padding: 18px 14px; border-radius: 18px; }
  .code-library-heading h2 { font-size: 24px; }
  .code-metrics { grid-template-columns: 1fr; }
  .code-card { padding: 13px; }
  .template-preview-shell iframe { height: 300px; }
  .code-library-cta { grid-template-columns: auto minmax(0, 1fr); }
  .code-library-cta > b { display: none; }
}
/* Motion, command lab and release tables */
@keyframes page-in { from { opacity: 0; transform: translateY(9px); } to { opacity: 1; transform: translateY(0); } }
@keyframes soft-pulse { 0%, 100% { opacity: .55; } 50% { opacity: 1; } }
@keyframes scan-line { 0% { transform: translateX(-110%); } 100% { transform: translateX(110%); } }
@keyframes terminal-blink { 0%, 45% { opacity: 1; } 46%, 100% { opacity: 0; } }
#main > * { animation: page-in .42s cubic-bezier(.2,.75,.25,1) both; }
#main > *:nth-child(2) { animation-delay: .035s; }
#main > *:nth-child(3) { animation-delay: .07s; }
#main > *:nth-child(4) { animation-delay: .105s; }
.command-page-enter .command-card { animation: page-in .38s ease both; }
.command-page-enter .command-card:nth-child(2n) { animation-delay: .04s; }
.command-page-enter .command-card:nth-child(3n) { animation-delay: .08s; }
.commands-hero::after { content: ""; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(100deg, transparent 35%, rgba(114,207,255,.04) 50%, transparent 65%); transform: translateX(-110%); animation: scan-line 9s ease-in-out 1.2s infinite; }
.commands-hero h1 { max-width: 590px; margin: 15px 0 13px; font-size: clamp(38px, 5vw, 68px); }
.commands-hero p { max-width: 640px; margin-bottom: 22px; font-size: 14px; }
.terminal-art-top i { width: 7px; height: 7px; border-radius: 50%; background: #ef6c67; }
.terminal-art-top i:nth-child(2) { background: #e7b55c; }
.terminal-art-top i:nth-child(3) { background: #6dcb82; }
.terminal-art-top span { margin-left: 5px; }
.terminal-art-body small { color: #73809c; }
.terminal-art-body b { color: #c7f66e; font-weight: 500; }
.terminal-art-body .terminal-success { color: #72cfff; }
.command-workflow .section-heading { align-items: flex-end; }
.command-workflow .section-heading > div { min-width: 0; }
.command-workflow .section-heading p { max-width: 650px; margin: 7px 0 0; font-size: 11px; }
.workflow-step > span { display: grid; place-items: center; width: 29px; height: 29px; flex-shrink: 0; border-radius: 9px; background: var(--lime-soft); color: var(--lime); font: 10px "Space Grotesk", sans-serif; }
.workflow-step h3 { margin: 3px 0 6px; font-size: 12px; }
.workflow-step p { margin: 0; font-size: 10px; line-height: 1.5; }
.command-section-head h2 { margin: 8px 0 5px; font-size: 23px; }
.command-section-head p { max-width: 560px; margin: 0; font-size: 11px; }
.platform-switch button { padding: 7px 8px; border: 1px solid transparent; border-radius: 7px; background: transparent; color: var(--subtle); font-size: 9px; cursor: pointer; transition: color .18s ease, background .18s ease, border-color .18s ease; }
.platform-switch button:hover { color: var(--text); }
.platform-switch button.active { border-color: rgba(114,207,255,.35); background: rgba(114,207,255,.1); color: var(--blue); }
.command-search input { width: 100%; min-width: 0; border: 0; outline: 0; background: transparent; color: var(--text); font-size: 11px; }
.command-filter.active { border-color: var(--command-accent, var(--lime)); background: var(--lime-soft); color: var(--lime); }
.command-card::before { content: ""; position: absolute; left: 0; top: 16px; bottom: 16px; width: 2px; border-radius: 2px; background: var(--command-accent); opacity: .35; }
.command-card:hover, .command-card.selected { transform: translateY(-2px); border-color: color-mix(in srgb, var(--command-accent) 44%, transparent); box-shadow: 0 16px 35px rgba(0,0,0,.2), 0 0 0 1px color-mix(in srgb, var(--command-accent) 10%, transparent); }
.command-card.selected { background: linear-gradient(140deg, color-mix(in srgb, var(--command-accent) 7%, transparent), rgba(255,255,255,.012)); }
.command-select:hover, .command-select.active { border-color: var(--command-accent); color: var(--command-accent); }
.command-card h2 { margin: 11px 0 5px; font-size: 14px; }
.command-card > p { min-height: 34px; margin: 0 0 12px; font-size: 10px; line-height: 1.55; }
.command-line code { flex: 1; min-width: 0; overflow-x: auto; color: #c7f66e; font: 10px/1.5 "SFMono-Regular", Consolas, monospace; white-space: nowrap; }
.command-meta b { color: var(--muted); font-weight: 600; }
.command-meta a { color: var(--command-accent); }
.command-empty > span { display: block; margin-bottom: 9px; color: var(--subtle); font-size: 26px; }
.command-empty h2 { margin: 0 0 5px; font-size: 15px; }
.command-empty p { margin: 0; font-size: 10px; }
.terminal-card-head > span { display: flex; align-items: center; gap: 7px; }
.terminal-card-head button { border: 0; background: transparent; color: var(--subtle); font: 9px "DM Sans", sans-serif; cursor: pointer; }
.terminal-card-head button:hover { color: var(--text); }
.terminal-form input { min-width: 0; flex: 1; padding: 9px 8px; border: 1px solid var(--border); border-radius: 8px; outline: 0; background: #0b1220; color: var(--text); font: 10px "SFMono-Regular", Consolas, monospace; }
.terminal-form input:focus { border-color: rgba(199,246,110,.5); box-shadow: 0 0 0 2px rgba(199,246,110,.08); }
.terminal-form button { flex-shrink: 0; padding: 8px 9px; border: 1px solid var(--lime); border-radius: 8px; background: var(--lime); color: #17200e; font-size: 9px; font-weight: 700; cursor: pointer; }
.terminal-form button:hover { filter: brightness(1.08); }
.terminal-form kbd { margin-left: 3px; padding: 2px 3px; border-color: rgba(23,32,14,.25); background: rgba(23,32,14,.1); color: #35491c; font-size: 7px; }
.terminal-entry + .terminal-entry { margin-top: 13px; padding-top: 13px; border-top: 1px dashed rgba(255,255,255,.1); }
.terminal-prompt-line code { color: var(--text); }
.terminal-entry pre { overflow-x: auto; margin: 5px 0 0; color: #8290aa; white-space: pre-wrap; }
.command-table-wrap table { width: 100%; min-width: 560px; border-collapse: collapse; text-align: left; }
.command-table-wrap th, .command-table-wrap td { padding: 12px 13px; border-bottom: 1px solid var(--border); vertical-align: top; }
.command-table-wrap th { background: rgba(255,255,255,.035); color: var(--subtle); font-size: 8px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.command-table-wrap td { color: var(--muted); font-size: 10px; }
.command-table-wrap tr:last-child td { border-bottom: 0; }
.command-table-wrap td:first-child { color: var(--text); font-weight: 600; white-space: nowrap; }
.command-warning > span { display: grid; place-items: center; width: 18px; height: 18px; flex-shrink: 0; border: 1px solid rgba(255,157,135,.4); border-radius: 50%; color: var(--coral); font-weight: 700; }
@media (max-width: 1100px) {
  .command-lab-grid { grid-template-columns: 1fr; }
  .terminal-card { position: static; }
  .workflow-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 720px) {
  .commands-hero { grid-template-columns: 1fr; min-height: 0; padding: 27px 21px; }
  .commands-hero h1 { font-size: 42px; }
  .command-terminal-art { max-width: 440px; transform: none; }
  .command-section-head { align-items: flex-start; flex-direction: column; }
  .platform-switch { width: 100%; }
  .platform-switch button { flex: 1; }
  .command-catalog, .command-checklist { padding: 17px; }
  .workflow-grid { grid-template-columns: 1fr; }
}
@media (max-width: 420px) {
  .commands-hero h1 { font-size: 36px; }
  .command-terminal-art { font-size: 10px; }
  .terminal-art-body { padding: 18px 13px 22px; }
  .terminal-form { flex-wrap: wrap; }
  .terminal-form input { flex-basis: 100%; }
  .terminal-form button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
}

/* ==========================================================================
   Lettura della lezione: avanzamento, indice, comfort del testo
   ========================================================================== */

/* Barra di avanzamento: fissa sotto la topbar, sottile e non intralciante. */
.reading-progress {
  position: fixed;
  top: var(--topbar);
  left: var(--sidebar);
  right: 0;
  z-index: 40;
  height: 2px;
  pointer-events: none;
}
.reading-progress > i {
  display: block;
  height: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--accent, var(--lime)), var(--lime));
  will-change: transform;
}

/* Il testo della lezione scala da una variabile, non da una classe: cosi'
   i pulsanti A-/A+ cambiano il valore senza rigenerare la pagina.
   I figli hanno dimensione propria, quindi vanno scalati uno per uno. */
.lesson-layout .lesson-content h2 { font-size: calc(20px * var(--lesson-scale, 1)); }
.lesson-layout .lesson-content p,
.lesson-layout .lesson-content li { font-size: calc(13px * var(--lesson-scale, 1)); }
.lesson-layout .lesson-content h3 { font-size: calc(13px * var(--lesson-scale, 1)); }
.lesson-layout .lesson-content p,
.lesson-layout .lesson-content li {
  line-height: 1.78;
}

.lesson-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  color: var(--subtle);
  font-size: 10px;
}

/* Indice della lezione */
.toc-card {
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 13px;
  background: var(--surface);
}
.toc-card h2 {
  margin: 0 0 11px;
  font-family: "DM Sans", sans-serif;
  font-size: 10px;
  letter-spacing: 0;
  text-transform: uppercase;
  color: var(--subtle);
}
.toc-list {
  display: grid;
  gap: 2px;
}
.toc-list a {
  position: relative;
  display: block;
  padding: 7px 10px 7px 16px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 10px;
  transition: color 0.18s ease, background-color 0.18s ease;
}
.toc-list a::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 4px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--border-strong);
  transform: translateY(-50%);
  transition: background-color 0.18s ease, transform 0.18s ease;
}
.toc-list a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
}
.toc-list a.active {
  color: var(--accent, var(--lime));
  background: color-mix(in srgb, var(--accent, var(--lime)) 10%, transparent);
}
.toc-list a.active::before {
  background: var(--accent, var(--lime));
  transform: translateY(-50%) scale(1.5);
}

.reader-tools {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 14px;
  padding-top: 13px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}
.reader-tools > span {
  color: var(--subtle);
  font-size: 9px;
}
.reader-buttons {
  display: flex;
  gap: 4px;
}
.reader-buttons button {
  min-width: 30px;
  height: 26px;
  padding: 0 6px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--surface-2);
  color: var(--muted);
  font-family: "Space Grotesk", sans-serif;
  font-size: 10px;
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}
.reader-buttons button:hover {
  color: var(--text);
  border-color: var(--accent, var(--lime));
  background: color-mix(in srgb, var(--accent, var(--lime)) 12%, transparent);
}
.reader-buttons button:focus-visible,
.toc-list a:focus-visible,
.lesson-pager-link:focus-visible,
.lesson-to-top:focus-visible {
  outline: 2px solid var(--accent, var(--lime));
  outline-offset: 2px;
}

/* Codice: le righe lunghe scorrono di default, si mandano a capo su richiesta. */
.code-window pre code {
  white-space: pre;
}
.code-window.wrapped pre {
  overflow-x: hidden;
}
.code-window.wrapped pre code {
  white-space: pre-wrap;
  word-break: break-word;
}
.copy-code[data-toggle-wrap][aria-pressed="true"] {
  border-color: var(--lime);
  color: var(--lime);
}

/* Pager fra lezioni */
.lesson-pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 22px;
}
.lesson-pager-link {
  display: grid;
  gap: 5px;
  min-width: 0;
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
  transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}
.lesson-pager-link:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--accent, var(--lime)) 42%, transparent);
  background: var(--surface-2);
}
.lesson-pager-link span {
  color: var(--subtle);
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.09em;
}
.lesson-pager-link strong {
  color: var(--text);
  font-size: 12px;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.lesson-pager-link.next {
  text-align: right;
}
.lesson-pager-end {
  display: grid;
  place-items: center;
  padding: 16px;
  border: 1px dashed var(--border-strong);
  border-radius: 14px;
  color: var(--subtle);
  font-size: 10px;
  text-align: center;
}

.lesson-to-top {
  display: block;
  margin: 16px auto 0;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--muted);
  font-size: 10px;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease;
}
.lesson-to-top[hidden] {
  display: none;
}
.lesson-to-top:hover {
  color: var(--text);
  border-color: var(--accent, var(--lime));
}

.lesson-content h2[id]:focus-visible {
  outline: 2px solid var(--accent, var(--lime));
  outline-offset: 4px;
  border-radius: 6px;
}

@media (max-width: 850px) {
  .reading-progress {
    left: 0;
  }
  .lesson-pager {
    grid-template-columns: 1fr;
  }
  .lesson-pager-link.next {
    text-align: left;
  }
}