/* KandianClaw — kandianclaw.com */
:root {
  --color-bg: #ffffff;
  --color-bg-subtle: #f8fafc;
  --color-bg-elevated: #ffffff;
  --color-surface: #f1f5f9;
  --color-border: #e2e8f0;
  --color-border-strong: #cbd5e1;
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-text-faint: #94a3b8;
  --color-primary: #0d9488;
  --color-primary-hover: #0f766e;
  --color-primary-subtle: #ccfbf1;
  --color-accent: #0369a1;
  --color-hero-bg: #0c1222;
  --color-hero-text: #f1f5f9;
  --color-code-bg: #1e293b;
  --color-code-text: #e2e8f0;
  --font-sans: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Microsoft YaHei", sans-serif;
  --font-mono: "Cascadia Code", "Fira Code", Consolas, "Courier New", monospace;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.12);
  --header-h: 64px;
  --content-max: 1120px;
  --docs-sidebar-w: 260px;
  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-hover);
}

code,
pre {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

/* Layout */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 24px;
}

.container--narrow {
  max-width: 720px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-text);
  text-decoration: none;
}

.brand:hover {
  color: var(--color-text);
}

.brand__icon {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.nav-primary {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-primary a {
  display: block;
  padding: 8px 14px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: color var(--transition), background var(--transition);
}

.nav-primary a:hover,
.nav-primary a.is-active {
  color: var(--color-text);
  background: var(--color-surface);
}

.nav-primary a.is-active {
  color: var(--color-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: var(--radius-sm);
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.4;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition), color var(--transition), border-color var(--transition),
    box-shadow var(--transition);
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.btn--primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: #fff;
}

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

.btn--secondary:hover {
  background: var(--color-surface);
  color: var(--color-text);
}

.btn--ghost {
  background: transparent;
  color: var(--color-hero-text);
  border-color: rgba(241, 245, 249, 0.35);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.btn--sm {
  padding: 6px 14px;
  font-size: 0.875rem;
}

.btn svg {
  width: 18px;
  height: 18px;
}

/* Hero */
.hero {
  background: var(--color-hero-bg);
  color: var(--color-hero-text);
  padding: 80px 0 96px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% -20%, rgba(13, 148, 136, 0.25), transparent),
    radial-gradient(ellipse 50% 40% at 100% 50%, rgba(3, 105, 161, 0.15), transparent);
  pointer-events: none;
}

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

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  margin-bottom: 24px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: #99f6e4;
  background: rgba(13, 148, 136, 0.15);
  border: 1px solid rgba(13, 148, 136, 0.35);
  border-radius: 999px;
}

.hero__title {
  margin: 0 0 20px;
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  max-width: 16ch;
}

.hero__title span {
  color: #5eead4;
}

.hero__desc {
  margin: 0 0 36px;
  font-size: 1.125rem;
  line-height: 1.7;
  color: #94a3b8;
  max-width: 42rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 48px;
}

.hero__install {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 520px;
  padding: 14px 18px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: #cbd5e1;
}

.hero__install code {
  flex: 1;
  overflow-x: auto;
  white-space: nowrap;
}

.copy-btn {
  flex-shrink: 0;
  padding: 6px 12px;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  color: #94a3b8;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(148, 163, 184, 0.25);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.copy-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.copy-btn.is-copied {
  color: #5eead4;
  border-color: rgba(94, 234, 212, 0.4);
}

/* Sections */
.section {
  padding: 80px 0;
}

.section--subtle {
  background: var(--color-bg-subtle);
}

.section__label {
  display: block;
  margin-bottom: 12px;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.section__title {
  margin: 0 0 16px;
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section__desc {
  margin: 0 0 48px;
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 36rem;
}

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card {
  padding: 28px;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: box-shadow var(--transition), border-color var(--transition);
}

.feature-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-strong);
}

.feature-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-bottom: 20px;
  background: var(--color-primary-subtle);
  color: var(--color-primary);
  border-radius: var(--radius-md);
}

.feature-card__icon svg {
  width: 24px;
  height: 24px;
}

.feature-card h3 {
  margin: 0 0 10px;
  font-size: 1.125rem;
  font-weight: 600;
}

.feature-card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  counter-reset: step;
}

.step {
  position: relative;
  padding-top: 8px;
}

.step::before {
  counter-increment: step;
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-bottom: 20px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-primary-subtle);
  border-radius: 50%;
}

.step h3 {
  margin: 0 0 8px;
  font-size: 1.0625rem;
  font-weight: 600;
}

.step p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

/* Skills preview */
.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.skill-tag {
  padding: 8px 16px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
}

/* CTA */
.cta {
  text-align: center;
  padding: 64px 48px;
  background: linear-gradient(135deg, var(--color-primary-subtle) 0%, #e0f2fe 100%);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(13, 148, 136, 0.2);
}

.cta h2 {
  margin: 0 0 12px;
  font-size: 1.75rem;
  font-weight: 700;
}

.cta p {
  margin: 0 0 28px;
  color: var(--color-text-muted);
}

.cta__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

/* Footer */
.site-footer {
  padding: 48px 0 32px;
  background: var(--color-bg-subtle);
  border-top: 1px solid var(--color-border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p {
  margin: 12px 0 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  max-width: 280px;
}

.footer-col h4 {
  margin: 0 0 16px;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-faint);
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  text-decoration: none;
}

.footer-col a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  font-size: 0.875rem;
  color: var(--color-text-faint);
}

.footer-bottom a {
  color: var(--color-text-muted);
}

/* Docs layout */
.docs-layout {
  display: grid;
  grid-template-columns: var(--docs-sidebar-w) 1fr;
  gap: 48px;
  padding: 40px 0 80px;
  align-items: start;
}

.docs-sidebar {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  max-height: calc(100vh - var(--header-h) - 48px);
  overflow-y: auto;
}

.docs-sidebar__title {
  margin: 0 0 16px;
  padding: 0 12px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-faint);
}

.docs-nav {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
}

.docs-nav li {
  margin-bottom: 2px;
}

.docs-nav a {
  display: block;
  padding: 8px 12px;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color var(--transition), background var(--transition), border-color var(--transition);
}

.docs-nav a:hover {
  color: var(--color-text);
  background: var(--color-surface);
}

.docs-nav a.is-active {
  color: var(--color-primary);
  font-weight: 500;
  background: var(--color-primary-subtle);
  border-left-color: var(--color-primary);
}

.docs-content {
  min-width: 0;
}

.docs-content h1 {
  margin: 0 0 12px;
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.docs-lead {
  margin: 0 0 40px;
  font-size: 1.125rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.docs-content h2 {
  margin: 48px 0 16px;
  padding-top: 24px;
  font-size: 1.375rem;
  font-weight: 600;
  border-top: 1px solid var(--color-border);
}

.docs-content h2:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.docs-content h3 {
  margin: 28px 0 12px;
  font-size: 1.0625rem;
  font-weight: 600;
}

.docs-content p {
  margin: 0 0 16px;
  color: var(--color-text-muted);
}

.docs-content ul,
.docs-content ol {
  margin: 0 0 20px;
  padding-left: 1.5rem;
  color: var(--color-text-muted);
}

.docs-content li {
  margin-bottom: 8px;
}

.docs-content strong {
  color: var(--color-text);
  font-weight: 600;
}

.code-block {
  position: relative;
  margin: 0 0 24px;
  padding: 18px 20px;
  background: var(--color-code-bg);
  color: var(--color-code-text);
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.6;
}

.code-block pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
}

.code-block .copy-btn {
  position: absolute;
  top: 12px;
  right: 12px;
}

.callout {
  padding: 16px 20px;
  margin: 0 0 24px;
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  line-height: 1.6;
}

.callout--info {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  color: #1e40af;
}

.callout--tip {
  background: var(--color-primary-subtle);
  border: 1px solid rgba(13, 148, 136, 0.3);
  color: #115e59;
}

.callout--warn {
  background: #fffbeb;
  border: 1px solid #fde68a;
  color: #92400e;
}

.docs-table {
  width: 100%;
  margin: 0 0 24px;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.docs-table th,
.docs-table td {
  padding: 12px 16px;
  text-align: left;
  border: 1px solid var(--color-border);
}

.docs-table th {
  background: var(--color-surface);
  font-weight: 600;
  color: var(--color-text);
}

.docs-table td {
  color: var(--color-text-muted);
}

.docs-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin: 0 0 32px;
}

.docs-card {
  padding: 24px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.docs-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
  color: inherit;
}

.docs-card h3 {
  margin: 0 0 8px;
  font-size: 1.0625rem;
  color: var(--color-text);
}

.docs-card p {
  margin: 0;
  font-size: 0.875rem;
}

/* Home preview cards */
.home-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.home-card {
  display: block;
  padding: 28px;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
}

.home-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  color: inherit;
}

.home-card h3 {
  margin: 0 0 10px;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
}

.home-card p {
  margin: 0 0 16px;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

.home-card__link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
}

/* Page hero (docs index) */
.page-hero {
  padding: 48px 0 32px;
  background: var(--color-bg-subtle);
  border-bottom: 1px solid var(--color-border);
}

.page-hero h1 {
  margin: 0 0 8px;
  font-size: 2rem;
  font-weight: 700;
}

.page-hero p {
  margin: 0;
  color: var(--color-text-muted);
}

/* Mobile nav */
@media (max-width: 900px) {
  .nav-toggle {
    display: flex;
  }

  .nav-primary-wrap {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    padding: 16px 24px 24px;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
  }

  .nav-primary-wrap.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-primary {
    flex-direction: column;
    align-items: stretch;
  }

  .nav-primary a {
    padding: 12px 16px;
  }

  .header-actions .btn--secondary {
    display: none;
  }

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

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

  .docs-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .docs-sidebar {
    position: static;
    max-height: none;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--color-border);
  }
}

@media (max-width: 600px) {
  .hero {
    padding: 56px 0 72px;
  }

  .section {
    padding: 56px 0;
  }

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

  .cta {
    padding: 40px 24px;
  }
}