/* Intdeck www — visual tokens aligned with Intdone main app (LandingV2) */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;600;700;800&family=Inter:wght@400;500;600&display=swap');

:root {
  color-scheme: light;
  --brand-blue: #2563eb;
  --brand-green: #10b981;
  --bg: #fcfdfe;
  --text: #0f172a;
  --text-secondary: #475569;
  --panel: rgba(255, 255, 255, 0.88);
  --card: rgba(255, 255, 255, 0.55);
  --border: rgba(16, 185, 129, 0.14);
  --code-bg: #f1f5f9;
  --mesh-light: 1;
  --mesh-dark: 0;
}

html.dark {
  color-scheme: dark;
  --bg: #020617;
  --text: #f1f5f9;
  --text-secondary: #94a3b8;
  --panel: rgba(15, 23, 42, 0.88);
  --card: rgba(30, 41, 59, 0.5);
  --border: rgba(16, 185, 129, 0.22);
  --code-bg: #0f172a;
  --mesh-light: 0;
  --mesh-dark: 1;
}

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

body {
  margin: 0;
  font-family: 'Outfit', 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  transition: background 0.6s ease, color 0.6s ease;
}

a {
  color: var(--brand-blue);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}
html.dark a {
  color: #60a5fa;
}

.mesh-wrap {
  position: relative;
  overflow: hidden;
  min-height: 100vh;
}

.mesh-wrap::before,
.mesh-wrap::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  transition: opacity 1s ease;
}

.mesh-wrap::before {
  background:
    radial-gradient(at 0% 0%, rgba(37, 99, 235, 0.07) 0, transparent 50%),
    radial-gradient(at 100% 0%, rgba(16, 185, 129, 0.06) 0, transparent 50%),
    radial-gradient(at 50% 80%, rgba(248, 250, 252, 0.9) 0, transparent 70%);
  opacity: var(--mesh-light);
}

.mesh-wrap::after {
  background:
    radial-gradient(at 0% 0%, rgba(37, 99, 235, 0.18) 0, transparent 50%),
    radial-gradient(at 100% 0%, rgba(16, 185, 129, 0.14) 0, transparent 50%),
    radial-gradient(at 50% 100%, rgba(37, 99, 235, 0.06) 0, transparent 50%);
  opacity: var(--mesh-dark);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.25rem;
  background: var(--panel);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: inherit;
  text-decoration: none;
  font-weight: 800;
  font-size: 1.15rem;
}

.brand img {
  height: 2rem;
  width: auto;
}

.brand span.gradient {
  background: linear-gradient(90deg, #2563eb, #10b981);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav-links {
  display: none;
  gap: 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
}
.nav-links a:hover {
  color: var(--brand-green);
  text-decoration: none;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.icon-btn {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  border-radius: 0.5rem;
  width: 2rem;
  height: 2rem;
  cursor: pointer;
  font-size: 0.75rem;
  font-weight: 700;
}

.icon-btn.lang-btn {
  min-width: 2.25rem;
  font-size: 0.65rem;
  letter-spacing: 0.02em;
}

main {
  position: relative;
  z-index: 1;
  max-width: 64rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

.hero {
  text-align: center;
  padding: 2.5rem 0 2rem;
}

.logo-glow {
  position: relative;
  display: inline-block;
  margin-bottom: 1rem;
}

.logo-glow::before {
  content: '';
  position: absolute;
  inset: -2.5rem;
  background: rgba(16, 185, 129, 0.22);
  filter: blur(48px);
  border-radius: 999px;
  opacity: 0.45;
  z-index: -1;
}

html.dark .logo-glow::before {
  background: rgba(16, 185, 129, 0.12);
  opacity: 0.7;
}

.logo-glow img {
  height: 5.5rem;
  width: auto;
  filter: drop-shadow(0 12px 24px rgba(0, 0, 0, 0.08));
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #059669;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--border);
  margin-bottom: 1.25rem;
}

html.dark .badge {
  color: #6ee7b7;
}

.hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.35rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 0.75rem;
  line-height: 1.2;
}

.tagline-en {
  display: none;
}

.tagline {
  font-size: clamp(0.95rem, 2.2vw, 1.05rem);
  color: var(--text-secondary);
  max-width: 36rem;
  margin: 0 auto 0.75rem;
  font-weight: 500;
}

.tagline em {
  display: block;
  font-style: normal;
  margin-top: 0.35rem;
  color: var(--text);
  font-weight: 600;
}

.hero-brand-note {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: -0.25rem 0 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.hero-brand-note:empty {
  display: none;
  margin: 0;
}

.hero-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 32rem;
  margin: 0 auto 1.5rem;
}

.tagline-zh {
  display: none;
}

.step-note {
  margin: 0.35rem 0 0;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.fail-example {
  margin-top: 1rem;
  font-size: 0.875rem;
}

.fail-example p {
  margin: 0.35rem 0 0;
  color: var(--text-secondary);
}

.boundary-rules li span {
  display: block;
  font-size: 0.88rem;
  margin-top: 0.25rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.lang-en {
  display: none;
}

.boundary-rules .lang-zh {
  display: none;
}

.footer-disclaimer {
  margin-top: 1rem;
  text-align: center;
  font-size: 0.85rem;
}

.footer-disclaimer .lang-en {
  margin-top: 0.5rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.25rem;
  border-radius: 0.75rem;
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.2s ease;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(90deg, #2563eb, #10b981);
  color: #fff;
  box-shadow: 0 8px 24px -8px rgba(16, 185, 129, 0.45);
}

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

.stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  margin: 2.5rem 0;
}

.stat {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1rem;
  text-align: center;
  backdrop-filter: blur(12px);
}

.stat strong {
  display: block;
  font-size: 1.35rem;
  font-weight: 800;
  background: linear-gradient(90deg, #2563eb, #10b981);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat span {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 600;
}

section {
  margin-bottom: 2.75rem;
}

section h2 {
  font-size: 1.25rem;
  font-weight: 800;
  margin: 0 0 1rem;
  letter-spacing: -0.01em;
}

.section-lead {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin: -0.35rem 0 1.25rem;
  max-width: 40rem;
}

.glass-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  padding: 1.25rem 1.35rem;
  backdrop-filter: blur(14px);
}

.two-col {
  display: grid;
  gap: 1rem;
}

.is-not {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--border);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.is-not strong {
  color: var(--text);
}

.grid-3 {
  display: grid;
  gap: 0.85rem;
}

.cap-card h3 {
  margin: 0 0 0.35rem;
  font-size: 0.95rem;
  font-weight: 700;
}

.cap-card p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.dest-grid {
  display: grid;
  gap: 0.85rem;
}

.dest-card {
  display: block;
  color: inherit;
  text-decoration: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.dest-card:hover {
  text-decoration: none;
  border-color: rgba(16, 185, 129, 0.45);
  box-shadow: 0 8px 28px -12px rgba(16, 185, 129, 0.35);
}

.dest-card .label {
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brand-green);
  margin-bottom: 0.35rem;
}

.dest-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}

.dest-card p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.dest-card.muted {
  opacity: 0.85;
  cursor: default;
  pointer-events: none;
}

.steps {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: step;
}

.steps li {
  counter-increment: step;
  position: relative;
  padding-left: 2.5rem;
  margin-bottom: 1.25rem;
}

.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 1.65rem;
  height: 1.65rem;
  border-radius: 0.5rem;
  background: linear-gradient(135deg, #2563eb, #10b981);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}

.steps h3 {
  margin: 0 0 0.35rem;
  font-size: 0.95rem;
}

pre {
  margin: 0.5rem 0 0;
  padding: 0.75rem 1rem;
  border-radius: 0.65rem;
  background: var(--code-bg);
  border: 1px solid var(--border);
  overflow-x: auto;
  font-size: 0.78rem;
  line-height: 1.5;
}

code {
  font-family: ui-monospace, 'Cascadia Code', 'Segoe UI Mono', monospace;
}

.boundary-rules {
  list-style: none;
  padding: 0;
  margin: 0 0 1.25rem;
}

.boundary-rules li {
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

.boundary-rules li:last-child {
  border-bottom: none;
}

.boundary-rules strong {
  display: block;
  margin-bottom: 0.15rem;
}

.table-wrap {
  overflow-x: auto;
  border-radius: 0.85rem;
  border: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}

th,
td {
  padding: 0.65rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

th {
  background: var(--code-bg);
  font-weight: 700;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

tr:last-child td {
  border-bottom: none;
}

.site-footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 2rem 1.25rem 2.5rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-secondary);
  opacity: 0.55;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem 1.5rem;
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
  text-transform: none;
  font-weight: 600;
  font-size: 0.8rem;
  opacity: 1;
}

@media (min-width: 640px) {
  .nav-links {
    display: flex;
  }

  .stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .two-col {
    grid-template-columns: 1fr 1fr;
  }

  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .dest-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 768px) {
  main {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}