:root {
  --bg-0: #0a0f16;
  --bg-1: #101722;
  --surface-0: #141c29;
  --surface-1: #192435;
  --border: rgba(56, 189, 248, 0.2);
  --text-0: #e6edf6;
  --text-1: #a5b5cc;
  --accent: #22d3ee;
  --accent-soft: rgba(34, 211, 238, 0.2);
  --shadow: 0 20px 50px rgba(5, 10, 20, 0.55);
  --header-height: 72px;
  --radius-lg: 18px;
  --radius-md: 14px;
  --radius-sm: 10px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  color: var(--text-0);
  background:
    radial-gradient(circle at 12% -8%, rgba(34, 211, 238, 0.14), transparent 42%),
    radial-gradient(circle at 90% 0%, rgba(34, 211, 238, 0.08), transparent 28%),
    linear-gradient(160deg, var(--bg-0), var(--bg-1));
  min-height: 100vh;
  line-height: 1.5;
}

a {
  color: inherit;
}

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

.page-wrap {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  backdrop-filter: blur(10px);
  background: rgba(10, 15, 22, 0.82);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.header-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 22px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-width: 0;
}

.brand {
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.015em;
  font-size: 1.05rem;
  color: var(--text-0);
}

.brand span {
  color: var(--accent);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.nav-link {
  text-decoration: none;
  color: var(--text-1);
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.93rem;
  white-space: nowrap;
  transition: color 180ms ease, border-color 180ms ease, background-color 180ms ease;
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--text-0);
  border-color: var(--border);
  background: rgba(34, 211, 238, 0.1);
}

main {
  width: min(1120px, 100% - 44px);
  margin: 28px auto 0;
  flex: 1;
}

.hero {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.06);
  background: linear-gradient(145deg, rgba(22, 31, 46, 0.95), rgba(17, 24, 36, 0.95));
  border-radius: var(--radius-lg);
  padding: 74px 40px;
  box-shadow: var(--shadow);
}

.hero::before {
  content: "";
  position: absolute;
  inset: -30% auto auto -20%;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.22), transparent 60%);
  filter: blur(16px);
  animation: pulse-glow 8s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes pulse-glow {
  from {
    transform: translate3d(0, 0, 0) scale(1);
    opacity: 0.7;
  }
  to {
    transform: translate3d(24px, -12px, 0) scale(1.07);
    opacity: 1;
  }
}

.hero > * {
  position: relative;
  z-index: 1;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.84rem;
  color: var(--text-1);
  background: rgba(34, 211, 238, 0.08);
  padding: 6px 13px;
}

.kicker::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.2;
}

.hero h1 {
  margin-top: 18px;
  font-size: clamp(2rem, 6vw, 3.4rem);
  letter-spacing: -0.02em;
}

.hero p {
  margin: 16px 0 0;
  max-width: 680px;
  color: var(--text-1);
  font-size: clamp(1rem, 2.3vw, 1.18rem);
}

.section-intro {
  margin: 50px 0 16px;
  color: var(--text-1);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}

.card {
  background: linear-gradient(165deg, rgba(25, 36, 54, 0.95), rgba(20, 29, 44, 0.95));
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
}

.tile-link {
  text-decoration: none;
  display: block;
  padding: 30px;
  min-height: 240px;
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.tile-link:hover {
  transform: translateY(-5px);
  border-color: var(--border);
  box-shadow: 0 24px 55px rgba(4, 9, 19, 0.62), 0 0 0 1px var(--accent-soft) inset;
}

.tile-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-weight: 700;
  color: var(--accent);
  background: rgba(34, 211, 238, 0.12);
  border: 1px solid var(--border);
  margin-bottom: 16px;
}

.tile-link h3 {
  font-size: 1.5rem;
  letter-spacing: -0.01em;
}

.tile-link p {
  color: var(--text-1);
  margin-top: 10px;
}

.page-title {
  margin-bottom: 8px;
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  letter-spacing: -0.02em;
}

.page-subtitle {
  margin: 0;
  color: var(--text-1);
  max-width: 760px;
}

.quick-nav {
  position: sticky;
  top: calc(var(--header-height) + 10px);
  z-index: 60;
  margin: 26px 0;
  padding: 10px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(13, 20, 32, 0.85);
  backdrop-filter: blur(6px);
  display: flex;
  gap: 10px;
  overflow-x: auto;
}

.quick-nav-pill {
  appearance: none;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-1);
  border-radius: 999px;
  padding: 8px 14px;
  font: inherit;
  white-space: nowrap;
  cursor: pointer;
  transition: border-color 180ms ease, color 180ms ease, background-color 180ms ease;
}

.quick-nav-pill:hover,
.quick-nav-pill.is-active {
  color: var(--text-0);
  border-color: var(--border);
  background: rgba(34, 211, 238, 0.12);
}

.prompt-section {
  margin: 0 0 34px;
  padding: 26px;
}

.prompt-section h2 {
  margin-bottom: 10px;
}

.prompt-section > p {
  margin: 0 0 18px;
  color: var(--text-1);
}

.prompt-list {
  display: grid;
  gap: 14px;
}

.prompt-card {
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  background: rgba(11, 16, 27, 0.65);
  padding: 16px;
}

.prompt-card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.prompt-card h3 {
  font-size: 1.02rem;
}

.code-panel {
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  background: rgba(8, 12, 20, 0.94);
  overflow: hidden;
}

.code-scroll {
  max-height: 68vh;
  overflow: auto;
}

pre {
  margin: 0;
  padding: 16px;
  font-family: "JetBrains Mono", monospace;
  color: #d9f4ff;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.92rem;
  line-height: 1.55;
}

.btn,
.btn-inline,
.copy-btn {
  appearance: none;
  border: 1px solid var(--border);
  background: rgba(34, 211, 238, 0.12);
  color: var(--text-0);
  border-radius: 10px;
  padding: 8px 12px;
  font: inherit;
  font-size: 0.88rem;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease;
}

.btn:hover,
.btn-inline:hover,
.copy-btn:hover {
  transform: translateY(-1px);
  background: rgba(34, 211, 238, 0.2);
}

.copy-btn {
  padding: 6px 10px;
}

.card-body {
  padding: 20px;
  display: grid;
  gap: 8px;
}

.card-body p {
  margin: 0;
  color: var(--text-1);
}

.card-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 6px;
}

.viewer-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 16px;
}

.viewer-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.viewer-panel {
  position: relative;
  border-radius: var(--radius-md);
}

.viewer-copy {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 2;
}

.not-found {
  padding: 30px;
}

.not-found p {
  color: var(--text-1);
}

.not-found a {
  color: var(--accent);
}

.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  margin-top: 50px;
  padding: 22px;
}

.footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  color: var(--text-1);
  font-size: 0.9rem;
}

.footer-inner a {
  color: var(--accent);
  text-decoration: none;
}

.footer-inner a:hover {
  text-decoration: underline;
}

.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 300ms ease, transform 300ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 900px) {
  .hero {
    padding: 58px 26px;
  }

  .prompt-section {
    padding: 20px;
  }
}

@media (max-width: 700px) {
  :root {
    --header-height: 64px;
  }

  .header-inner {
    padding: 0 14px;
    gap: 8px;
  }

  .brand {
    font-size: 0.95rem;
    flex: 0 0 auto;
  }

  .site-nav {
    gap: 4px;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding-bottom: 2px;
  }

  .site-nav::-webkit-scrollbar {
    display: none;
  }

  .nav-link {
    padding: 7px 10px;
    font-size: 0.82rem;
  }

  main {
    width: min(1120px, 100% - 26px);
    margin-top: 18px;
  }

  .hero h1 {
    margin-top: 14px;
  }

  .tile-link {
    min-height: 200px;
    padding: 22px;
  }

  .quick-nav {
    top: calc(var(--header-height) + 6px);
    margin: 18px 0;
  }

  pre {
    font-size: 0.86rem;
  }
}