:root {
  --blue: #2563eb;
  --blue-deep: #1d4ed8;
  --blue-soft: rgba(37, 99, 235, 0.12);
  --ink: #1a222c;
  --ink-muted: #5a6573;
  --paper: #f3f5f7;
  --paper-2: #e8ecf0;
  --line: rgba(26, 34, 44, 0.1);
  --white: #ffffff;
  --shadow: 0 18px 50px rgba(26, 34, 44, 0.12);
  --radius: 14px;
  --font-display: "Syne", "Avenir Next", "Segoe UI", sans-serif;
  --font-body: "Figtree", "Avenir Next", "Segoe UI", sans-serif;
  --max: 1120px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(37, 99, 235, 0.08), transparent 55%),
    radial-gradient(900px 420px at 100% 0%, rgba(26, 34, 44, 0.05), transparent 50%),
    var(--paper);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

button,
input {
  font: inherit;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 100;
  padding: 0.6rem 0.9rem;
  background: var(--ink);
  color: var(--white);
  border-radius: 8px;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: absolute;
  inset: 0 0 auto;
  z-index: 5;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  width: min(100% - 2rem, var(--max));
  margin: 0 auto;
  padding: 1.25rem 0;
  color: var(--white);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  text-decoration: none;
}

.brand-mark svg {
  width: 1.55rem;
  height: 1.55rem;
}

.header-github {
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.88);
  transition: color 0.2s var(--ease);
}

.header-github:hover,
.header-github:focus-visible {
  color: var(--white);
}

.header-github svg {
  width: 1.45rem;
  height: 1.45rem;
}

.hero {
  position: relative;
  min-height: 60svh;
  display: grid;
  align-items: center;
  color: var(--white);
  overflow: hidden;
  isolation: isolate;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.08);
  animation: hero-drift 18s var(--ease) infinite alternate;
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(12, 16, 22, 0.42) 0%, rgba(12, 16, 22, 0.28) 35%, rgba(12, 16, 22, 0.78) 100%),
    linear-gradient(115deg, rgba(37, 99, 235, 0.35), transparent 48%);
}

.hero-content {
  width: min(100% - 2rem, var(--max));
  margin: 0 auto;
  padding: 4rem 0 4.5rem;
}

.hero-brand {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(2.21rem, 5.95vw, 4.59rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.03em;
  max-width: 11ch;
  opacity: 0;
  transform: translateY(18px);
  animation: rise 0.9s var(--ease) 0.1s forwards;
}

.hero-brand span {
  display: block;
  color: #93c5fd;
}

.hero-lead {
  margin: 0 0 1.75rem;
  max-width: 34rem;
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  color: rgba(255, 255, 255, 0.88);
  opacity: 0;
  transform: translateY(18px);
  animation: rise 0.9s var(--ease) 0.25s forwards;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  opacity: 0;
  transform: translateY(18px);
  animation: rise 0.9s var(--ease) 0.4s forwards;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 3rem;
  padding: 0.7rem 1.15rem;
  border-radius: 999px;
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 650;
  letter-spacing: 0.01em;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), border-color 0.25s var(--ease), color 0.25s var(--ease);
}

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

.btn-primary {
  background: var(--blue);
  color: var(--white);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--blue-deep);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.28);
  color: var(--white);
  backdrop-filter: blur(8px);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background: rgba(255, 255, 255, 0.16);
}

.panel {
  width: min(100% - 2rem, var(--max));
  margin: -2.5rem auto 0;
  position: relative;
  z-index: 2;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
  display: grid;
  gap: 0.85rem;
}

.search-wrap {
  display: grid;
  gap: 0.45rem;
}

.search-wrap label {
  font-size: 0.85rem;
  font-weight: 650;
  color: var(--ink-muted);
}

.search-wrap input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.95rem 1rem;
  background: var(--white);
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.search-wrap input:focus {
  border-color: rgba(37, 99, 235, 0.55);
  box-shadow: 0 0 0 4px var(--blue-soft);
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1rem;
  align-items: center;
  justify-content: space-between;
  color: var(--ink-muted);
  font-size: 0.92rem;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.chip {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--ink-muted);
  border-radius: 999px;
  padding: 0.45rem 0.8rem;
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.chip:hover,
.chip:focus-visible {
  border-color: rgba(37, 99, 235, 0.4);
  color: var(--ink);
  transform: translateY(-1px);
}

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

.catalog {
  width: min(100% - 2rem, var(--max));
  margin: 2.5rem auto 4rem;
  display: grid;
  gap: 2.5rem;
}

.section {
  scroll-margin-top: 1.25rem;
  opacity: 0;
  transform: translateY(16px);
  animation: rise 0.7s var(--ease) forwards;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.85rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--line);
}

.section-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.section-count {
  color: var(--ink-muted);
  font-size: 0.9rem;
}

.subgroup + .subgroup,
.item-list + .subgroup,
.subgroup + .item-list {
  margin-top: 1.1rem;
}

.subgroup h3 {
  margin: 0 0 0.55rem;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--blue-deep);
}

.item-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.item {
  display: grid;
  gap: 0.25rem;
  padding: 0.95rem 1rem;
  border-left: 3px solid transparent;
  border-radius: 0 12px 12px 0;
  background: transparent;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.item:hover,
.item:focus-within {
  background: rgba(255, 255, 255, 0.72);
  border-left-color: var(--blue);
  transform: translateX(3px);
}

.item a {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 700;
  font-family: var(--font-display);
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--ink);
}

.item a:hover,
.item a:focus-visible {
  color: var(--blue-deep);
}

.item-favicon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  border-radius: 3px;
  object-fit: contain;
}

.item p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.98rem;
}

.item-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.45rem;
}

.item-link-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper-2);
  color: var(--ink-muted);
  font-size: 0.78rem;
  font-weight: 600;
  font-family: var(--font-body);
  letter-spacing: 0.02em;
  text-decoration: none;
  text-transform: lowercase;
  transition: background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.item-link-tag:hover,
.item-link-tag:focus-visible {
  background: var(--blue-soft);
  border-color: rgba(37, 99, 235, 0.4);
  color: var(--blue-deep);
}

.item mark {
  background: rgba(37, 99, 235, 0.15);
  color: inherit;
  border-radius: 3px;
  padding: 0 0.12em;
}

.empty {
  width: min(100% - 2rem, var(--max));
  margin: 2rem auto;
  padding: 1.5rem;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  color: var(--ink-muted);
  text-align: center;
  display: none;
}

.empty.is-visible {
  display: block;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, transparent, rgba(26, 34, 44, 0.03));
}

.footer-inner {
  width: min(100% - 2rem, var(--max));
  margin: 0 auto;
  padding: 2.5rem 0 3rem;
  display: grid;
  gap: 0.75rem;
  color: var(--ink-muted);
}

.footer-inner strong {
  color: var(--ink);
  font-family: var(--font-display);
}

.footer-inner p {
  font-size: 0.85rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.25rem;
}

.footer-commit {
  font-size: 0.8rem;
  color: var(--ink-muted);
  margin: 0;
}

.footer-commit code {
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 0.78rem;
  background: var(--paper-2);
  border-radius: 4px;
  padding: 0.05em 0.35em;
}

.footer-commit a {
  color: inherit;
}

.footer-photo {
  font-size: 0.8rem;
  color: var(--ink-muted);
  margin: 0;
}

.footer-photo a {
  color: inherit;
}

.footer-links {
  font-size: 0.85rem;
}

.footer-links a {
  color: var(--ink);
}

.back-to-top {
  position: fixed;
  bottom: 1.75rem;
  right: 1.75rem;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  border: none;
  background: var(--blue);
  color: var(--white);
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.35);
  opacity: 0;
  translate: 0 8px;
  transition: opacity 0.25s var(--ease), translate 0.25s var(--ease), background 0.2s var(--ease), box-shadow 0.2s var(--ease);
  pointer-events: none;
}

.back-to-top:not([hidden]) {
  pointer-events: auto;
}

.back-to-top.is-visible {
  opacity: 1;
  translate: 0 0;
}

.back-to-top:hover,
.back-to-top:focus-visible {
  background: var(--blue-deep);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
}

.back-to-top svg {
  width: 1.1rem;
  height: 1.1rem;
}

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

@keyframes hero-drift {
  from {
    transform: scale(1.08) translate3d(0, 0, 0);
  }
  to {
    transform: scale(1.14) translate3d(-1.5%, -1%, 0);
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .hero-brand,
  .hero-lead,
  .hero-actions,
  .section {
    opacity: 1;
    transform: none;
  }

  .hero-media img {
    transform: none;
  }
}

@media (max-width: 720px) {
  .hero-content {
    padding: 3.5rem 0 3.5rem;
  }

  .panel {
    margin-top: -1.75rem;
  }

  .section-head {
    align-items: start;
    flex-direction: column;
  }
}