:root {
  --bg: #f7f7f5;
  --bg-elevated: #ffffff;
  --ink: #0b0b0b;
  --ink-soft: #2a2a2a;
  --muted: #5c5c5c;
  --faint: #8a8a8a;
  --line: #e2e2de;
  --line-strong: #0b0b0b;
  --chip: #efefeb;
  --chip-active: #0b0b0b;
  --chip-active-text: #f7f7f5;
  --focus: #0b0b0b;
  --shadow: 0 1px 0 rgba(11, 11, 11, 0.04);
  --radius: 2px;
  --header-h: 64px;
  --font-display: "Bricolage Grotesque", system-ui, sans-serif;
  --font-body: "IBM Plex Sans", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --max: 1120px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(11, 11, 11, 0.05), transparent 55%),
    radial-gradient(900px 420px at 100% 0%, rgba(11, 11, 11, 0.04), transparent 50%),
    var(--bg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  text-decoration: none;
}

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

.site-header,
main,
.site-footer,
.back-top {
  position: relative;
  z-index: 1;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: var(--header-h);
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
  background: rgba(247, 247, 245, 0.86);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  min-width: 0;
}

.brand-logo {
  width: 36px;
  height: 36px;
  flex: 0 0 auto;
  border-radius: 0;
  display: block;
  object-fit: contain;
  background: transparent;
}

.brand-mark {
  width: 14px;
  height: 14px;
  background: var(--ink);
  transform: rotate(45deg);
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-shrink: 0;
}

.header-nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
  transition: color 180ms var(--ease);
}

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

.nav-roadmaps {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 0.85rem;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--bg) !important;
  font-weight: 600;
  text-decoration: none !important;
  transition: background 160ms var(--ease), color 160ms var(--ease), transform 160ms var(--ease);
}

.nav-roadmaps:hover {
  background: transparent;
  color: var(--ink) !important;
}

.btn-roadmaps {
  gap: 0.65rem;
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
  font-weight: 600;
  padding-right: 0.55rem;
}

.btn-roadmaps:hover {
  background: #222;
}

.btn-roadmaps-meta {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 0.55rem;
  background: rgba(247, 247, 245, 0.14);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.hero-logo {
  display: block;
  width: 88px;
  height: 88px;
  margin: 0 0 1.25rem;
  border-radius: 0;
  object-fit: contain;
  background: transparent;
}

.footer-brand-row {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
}

.roadmaps-section {
  scroll-margin-top: calc(var(--header-h) + 12px);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  background:
    linear-gradient(180deg, #101010 0%, #0b0b0b 100%);
  color: #f3f3f0;
}

.roadmaps-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(2.5rem, 6vw, 4rem) clamp(1.25rem, 4vw, 2.5rem);
}

.roadmaps-intro .eyebrow {
  color: #a8a8a4;
}

.roadmaps-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 1;
}

.roadmaps-sub {
  margin: 0.9rem 0 0;
  max-width: 46ch;
  color: #c4c4be;
  font-size: 1.02rem;
}

.roadmaps-sub a {
  color: #f3f3f0;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.roadmaps-toolbar {
  display: grid;
  gap: 0.85rem;
  margin-top: 1.75rem;
}

.roadmaps-search #roadmap-search {
  background: #161616;
  border-color: #333;
  color: #f3f3f0;
}

.roadmaps-search #roadmap-search::placeholder {
  color: #8a8a84;
}

.roadmaps-search #roadmap-search:focus {
  border-color: #f3f3f0;
  box-shadow: 0 0 0 3px rgba(243, 243, 240, 0.12);
}

.roadmaps-search .search-icon {
  color: #8a8a84;
}

.roadmap-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.roadmap-filters .chip {
  background: transparent;
  border-color: #3a3a36;
  color: #d8d8d2;
}

.roadmap-filters .chip:hover {
  border-color: #f3f3f0;
  color: #f3f3f0;
}

.roadmap-filters .chip.is-active {
  background: #f3f3f0;
  border-color: #f3f3f0;
  color: #0b0b0b;
}

#roadmap-meta {
  color: #9c9c96;
}

.roadmap-catalog {
  display: grid;
  gap: 2rem;
  margin-top: 1.75rem;
}

.roadmap-group-title {
  margin: 0 0 0.75rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #9c9c96;
}

.roadmap-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 0.65rem;
}

.roadmap-card {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  min-height: 100%;
  padding: 1rem 1.05rem;
  border: 1px solid #2e2e2a;
  background: #141414;
  text-decoration: none;
  transition: border-color 160ms var(--ease), background 160ms var(--ease), transform 160ms var(--ease);
}

.roadmap-card:hover {
  border-color: #f3f3f0;
  background: #1a1a1a;
  transform: translateY(-1px);
}

.roadmap-card-name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: #f3f3f0;
}

.roadmap-card-desc {
  margin: 0;
  flex: 1;
  color: #a8a8a4;
  font-size: 0.86rem;
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.roadmap-card-cta {
  margin-top: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: #f3f3f0;
  opacity: 0.7;
}

.roadmap-card:hover .roadmap-card-cta {
  opacity: 1;
}

.roadmaps-credit {
  margin: 2rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: #7a7a74;
}

.roadmaps-credit a {
  color: #c4c4be;
}

.section-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.75rem clamp(1.25rem, 4vw, 2.5rem) 0.25rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-divider::before,
.section-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.roadmaps-empty {
  padding: 2rem 1rem;
  border: 1px dashed #3a3a36;
  text-align: center;
  color: #9c9c96;
}

.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(3.5rem, 8vw, 6.5rem) clamp(1.25rem, 4vw, 2.5rem) clamp(2.5rem, 5vw, 4rem);
  animation: rise 700ms var(--ease) both;
}

.hero-copy {
  max-width: 42rem;
}

.eyebrow {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.hero-brand {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(3.6rem, 10vw, 6.4rem);
  font-weight: 800;
  line-height: 0.92;
  letter-spacing: -0.055em;
}

.hero-line {
  margin: 1.25rem 0 0;
  max-width: 18ch;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.6vw, 1.85rem);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.03em;
  color: var(--ink-soft);
}

.hero-sub {
  margin: 1rem 0 0;
  max-width: 38ch;
  color: var(--muted);
  font-size: 1.02rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.7rem 1.15rem;
  border: 1px solid var(--line-strong);
  font-size: 0.92rem;
  font-weight: 500;
  text-decoration: none;
  transition: transform 180ms var(--ease), background 180ms var(--ease), color 180ms var(--ease);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--ink);
  color: var(--bg);
}

.btn-ghost {
  background: transparent;
}

.hero-meta {
  display: grid;
  gap: 0;
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  animation: rise 900ms var(--ease) 80ms both;
}

.stat {
  display: grid;
  gap: 0.25rem;
  padding: 1.15rem 1.25rem;
  border-bottom: 1px solid var(--line);
}

.stat:last-child {
  border-bottom: 0;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 1.85rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
}

.stat-label {
  font-size: 0.82rem;
  color: var(--muted);
}

.controls {
  position: sticky;
  top: var(--header-h);
  z-index: 30;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(247, 247, 245, 0.94);
  backdrop-filter: blur(12px);
}

.controls-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.25rem;
  max-width: var(--max);
  margin: 0 auto;
  padding: 1rem clamp(1.25rem, 4vw, 2.5rem) 0.65rem;
}

.search-wrap {
  position: relative;
  flex: 1 1 280px;
  max-width: 520px;
}

.search-icon {
  position: absolute;
  top: 50%;
  left: 0.95rem;
  width: 1.125rem;
  height: 1.125rem;
  transform: translateY(-50%);
  color: var(--faint);
  display: grid;
  place-items: center;
  pointer-events: none;
  z-index: 1;
}

.search-icon svg {
  display: block;
  width: 18px;
  height: 18px;
}

#search,
#roadmap-search {
  width: 100%;
  min-height: 46px;
  padding: 0.7rem 2.75rem 0.7rem 3rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  outline: none;
  transition: border-color 160ms var(--ease), box-shadow 160ms var(--ease);
}

#search:focus,
#roadmap-search:focus {
  border-color: var(--ink);
  box-shadow: 0 0 0 3px rgba(11, 11, 11, 0.08);
}

.search-hint {
  position: absolute;
  top: 50%;
  right: 0.75rem;
  transform: translateY(-50%);
  padding: 0.15rem 0.4rem;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--bg);
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.results-meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
}

.chip-rail {
  display: flex;
  gap: 0.45rem;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem) 1rem;
  overflow-x: auto;
  scrollbar-width: thin;
}

.chip {
  flex: 0 0 auto;
  min-height: 34px;
  padding: 0.35rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-elevated);
  color: var(--ink-soft);
  font-size: 0.8rem;
  font-weight: 500;
  white-space: nowrap;
  cursor: pointer;
  transition: background 160ms var(--ease), color 160ms var(--ease), border-color 160ms var(--ease);
}

.chip:hover {
  border-color: var(--ink);
}

.chip.is-active {
  background: var(--chip-active);
  border-color: var(--chip-active);
  color: var(--chip-active-text);
}

.catalog {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.5rem clamp(1.25rem, 4vw, 2.5rem) 5rem;
}

.category-block {
  margin-top: 2.25rem;
  scroll-margin-top: calc(var(--header-h) + 120px);
  animation: rise 500ms var(--ease) both;
}

.category-block:first-child {
  margin-top: 0.5rem;
}

.category-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--ink);
}

.category-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3vw, 1.9rem);
  font-weight: 700;
  letter-spacing: -0.035em;
}

.category-count {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
}

.subgroup {
  margin-top: 1.35rem;
}

.subgroup-title {
  margin: 0 0 0.65rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.repo-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.repo-item {
  border-bottom: 1px solid var(--line);
}

.repo-link {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.6fr) auto;
  gap: 1rem 1.25rem;
  align-items: baseline;
  padding: 0.95rem 0.15rem;
  text-decoration: none;
  transition: background 160ms var(--ease), padding-left 160ms var(--ease);
}

.repo-link:hover {
  background: rgba(11, 11, 11, 0.03);
  padding-left: 0.45rem;
}

.repo-name {
  font-weight: 600;
  letter-spacing: -0.015em;
}

.repo-owner {
  display: block;
  margin-top: 0.15rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--faint);
}

.repo-desc {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.repo-cta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink);
  white-space: nowrap;
  opacity: 0.55;
  transition: opacity 160ms var(--ease);
}

.repo-link:hover .repo-cta {
  opacity: 1;
}

.empty-state {
  margin: 3rem 0;
  padding: 2.5rem 1.25rem;
  border: 1px dashed var(--line);
  text-align: center;
  color: var(--muted);
}

.empty-state strong {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 1.25rem;
}

.site-footer {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2rem;
  max-width: var(--max);
  margin: 0 auto;
  padding: 2.5rem clamp(1.25rem, 4vw, 2.5rem) 3.5rem;
  border-top: 1px solid var(--line);
}

.footer-brand p {
  max-width: 36ch;
  margin: 0.75rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.footer-links {
  display: grid;
  gap: 0.55rem;
  align-content: start;
}

.footer-links a {
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.footer-note {
  grid-column: 1 / -1;
  margin: 0.5rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--faint);
}

.back-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 50;
  width: 42px;
  height: 42px;
  border: 1px solid var(--ink);
  background: var(--bg-elevated);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 200ms var(--ease), transform 200ms var(--ease);
}

.back-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.mark {
  background: rgba(11, 11, 11, 0.12);
  color: inherit;
  border-radius: 2px;
  padding: 0 0.1em;
}

.roadmaps-section .mark {
  background: rgba(243, 243, 240, 0.22);
}

.is-hidden {
  display: none !important;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 860px) {
  .hero {
    padding-top: clamp(2.5rem, 8vw, 4rem);
    padding-bottom: 2rem;
  }

  .hero-logo {
    width: 72px;
    height: 72px;
  }

  .repo-link {
    grid-template-columns: 1fr;
    gap: 0.35rem;
    padding: 1rem 0.1rem;
  }

  .repo-cta {
    justify-self: start;
  }

  .site-footer {
    grid-template-columns: 1fr;
  }

  .roadmap-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }
}

@media (max-width: 640px) {
  :root {
    --header-h: 58px;
  }

  .site-header {
    padding-left: max(1rem, env(safe-area-inset-left));
    padding-right: max(1rem, env(safe-area-inset-right));
  }

  .brand-name {
    font-size: 0.98rem;
  }

  .brand-logo {
    width: 32px;
    height: 32px;
  }

  .header-nav {
    gap: 0.4rem;
  }

  .header-nav a {
    font-size: 0.82rem;
  }

  .nav-instagram {
    display: none;
  }

  .nav-roadmaps {
    min-height: 32px;
    padding: 0 0.7rem;
  }

  .hero {
    padding-left: max(1rem, env(safe-area-inset-left));
    padding-right: max(1rem, env(safe-area-inset-right));
  }

  .hero-brand {
    font-size: clamp(2.8rem, 14vw, 3.8rem);
  }

  .hero-line {
    max-width: none;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .btn-roadmaps {
    justify-content: space-between;
    padding-left: 1.15rem;
  }

  .controls-inner,
  .chip-rail,
  .catalog,
  .roadmaps-inner,
  .section-divider,
  .site-footer {
    padding-left: max(1rem, env(safe-area-inset-left));
    padding-right: max(1rem, env(safe-area-inset-right));
  }

  .controls-inner {
    padding-top: 0.85rem;
  }

  .search-hint {
    display: none;
  }

  #search,
  #roadmap-search {
    font-size: 16px; /* prevent iOS zoom */
  }

  .chip,
  .roadmap-filters .chip {
    min-height: 40px;
    padding: 0.45rem 0.9rem;
  }

  .chip-rail {
    margin-left: 0;
    padding-bottom: 0.85rem;
    -webkit-overflow-scrolling: touch;
  }

  .category-block {
    scroll-margin-top: calc(var(--header-h) + 140px);
  }

  .category-head {
    flex-wrap: wrap;
    gap: 0.35rem 0.75rem;
  }

  .roadmap-grid {
    grid-template-columns: 1fr;
  }

  .roadmap-card {
    padding: 1.05rem 1rem;
  }

  .back-top {
    right: max(1rem, env(safe-area-inset-right));
    bottom: max(1rem, env(safe-area-inset-bottom));
  }

  .site-footer {
    padding-bottom: max(2.5rem, calc(env(safe-area-inset-bottom) + 1.5rem));
  }
}

@media (max-width: 380px) {
  .brand-name {
    max-width: 9ch;
    overflow: hidden;
    text-overflow: ellipsis;
  }
}

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

  .hero,
  .hero-meta,
  .category-block,
  .btn,
  .repo-link,
  .back-top {
    animation: none !important;
    transition: none !important;
  }
}