/* dv-binance.com — Mintlify-style dark documentation platform */
:root {
  --bg: #0a0f1e;
  --bg-2: #0f1729;
  --bg-3: #131e33;
  --bg-card: #111827;
  --bg-card-2: #1a2540;
  --border: #1e293b;
  --border-2: #253350;
  --teal: #0f766e;
  --teal-2: #14b8a6;
  --blue: #0369a1;
  --blue-2: #38bdf8;
  --accent: linear-gradient(135deg, #0f766e, #0369a1);
  --accent-hover: linear-gradient(135deg, #0d9488, #0284c7);
  --text-1: #f1f5f9;
  --text-2: #cbd5e1;
  --text-3: #94a3b8;
  --text-4: #64748b;
  --font: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow: 0 1px 3px rgba(0,0,0,0.4), 0 4px 16px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --max-w: 1200px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-2);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
ul, ol { list-style: none; }

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

/* ─── Nav ─── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10,15,30,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 64px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.nav-logo img { height: 32px; width: auto; }
.nav-brand {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-1);
  letter-spacing: -0.01em;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}
.nav-links a {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-3);
  padding: 6px 12px;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}
.nav-links a:hover { color: var(--text-1); background: var(--bg-card); }
.nav-actions { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.btn-nav-outline {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-2);
  border: 1px solid var(--border-2);
  border-radius: 8px;
  padding: 7px 16px;
  background: transparent;
  transition: border-color 0.15s, color 0.15s;
}
.btn-nav-outline:hover { border-color: var(--teal-2); color: var(--text-1); }
.btn-nav-primary {
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
  border-radius: 8px;
  padding: 8px 18px;
  background: var(--accent);
  transition: opacity 0.15s;
}
.btn-nav-primary:hover { opacity: 0.88; }

/* ─── Hero ─── */
.hero {
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse at center, rgba(15,118,110,0.18) 0%, transparent 70%);
  pointer-events: none;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(15,118,110,0.12);
  border: 1px solid rgba(20,184,166,0.25);
  border-radius: 999px;
  padding: 5px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--teal-2);
  margin-bottom: 28px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.hero-badge-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--teal-2);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  color: var(--text-1);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  max-width: 860px;
  margin-left: auto;
  margin-right: auto;
}
.hero h1 .accent-text {
  background: var(--accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 1.1rem;
  color: var(--text-3);
  max-width: 600px;
  margin: 0 auto 36px;
  line-height: 1.7;
}
.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  background: var(--accent);
  border-radius: var(--radius);
  padding: 14px 28px;
  transition: opacity 0.15s, transform 0.15s;
}
.btn-primary:hover { opacity: 0.88; transform: translateY(-1px); }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-2);
  background: var(--bg-card);
  border: 1px solid var(--border-2);
  border-radius: var(--radius);
  padding: 13px 24px;
  transition: border-color 0.15s, color 0.15s;
}
.btn-secondary:hover { border-color: var(--teal-2); color: var(--text-1); }
.hero-meta {
  margin-top: 28px;
  font-size: 0.82rem;
  color: var(--text-4);
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}
.hero-meta span { display: flex; align-items: center; gap: 6px; }

/* ─── Stat Band ─── */
.stats-band {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 32px 0;
  background: var(--bg-2);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.stat-item {
  text-align: center;
  padding: 12px 24px;
  border-right: 1px solid var(--border);
}
.stat-item:last-child { border-right: none; }
.stat-val {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text-1);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 6px;
}
.stat-val span {
  background: var(--accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label { font-size: 0.82rem; color: var(--text-4); }

/* ─── Feature Cards ─── */
.section { padding: 72px 0; }
.section-header { margin-bottom: 48px; }
.section-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--teal-2);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 800;
  color: var(--text-1);
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 14px;
}
.section-sub {
  font-size: 1rem;
  color: var(--text-3);
  max-width: 560px;
  line-height: 1.7;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color 0.2s, transform 0.2s;
}
.feature-card:hover { border-color: var(--border-2); transform: translateY(-2px); }
.feature-icon {
  width: 48px; height: 48px;
  border-radius: 10px;
  background: rgba(15,118,110,0.12);
  border: 1px solid rgba(20,184,166,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.4rem;
}
.feature-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 10px;
}
.feature-desc { font-size: 0.9rem; color: var(--text-3); line-height: 1.65; }

/* ─── Split Section ─── */
.split-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.split-section.reverse { direction: rtl; }
.split-section.reverse > * { direction: ltr; }

.split-visual {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  overflow: hidden;
}
.split-visual::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(15,118,110,0.15), transparent 70%);
  pointer-events: none;
}
.platform-list { display: flex; flex-direction: column; gap: 12px; }
.platform-row {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  transition: border-color 0.15s;
}
.platform-row:hover { border-color: var(--teal-2); }
.platform-icon { font-size: 1.5rem; }
.platform-info { flex: 1; }
.platform-name { font-size: 0.9rem; font-weight: 600; color: var(--text-1); }
.platform-desc { font-size: 0.78rem; color: var(--text-4); }
.platform-badge {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--teal-2);
  background: rgba(20,184,166,0.1);
  border: 1px solid rgba(20,184,166,0.25);
  border-radius: 999px;
  padding: 3px 10px;
}
.platform-dl-btn {
  font-size: 0.82rem;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border-radius: 6px;
  padding: 7px 14px;
  white-space: nowrap;
  transition: opacity 0.15s;
}
.platform-dl-btn:hover { opacity: 0.85; }

.check-list { display: flex; flex-direction: column; gap: 14px; margin-top: 24px; }
.check-item { display: flex; align-items: flex-start; gap: 12px; }
.check-dot {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: rgba(15,118,110,0.15);
  border: 1px solid rgba(20,184,166,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
  font-size: 0.65rem;
  color: var(--teal-2);
}
.check-text { font-size: 0.92rem; color: var(--text-3); line-height: 1.55; }
.check-text strong { color: var(--text-1); }

/* ─── Security Section ─── */
.security-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.security-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
}
.security-card-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}
.security-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: rgba(3,105,161,0.12);
  border: 1px solid rgba(56,189,248,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}
.security-name { font-size: 1rem; font-weight: 700; color: var(--text-1); }
.security-desc { font-size: 0.88rem; color: var(--text-3); line-height: 1.6; }
.progress-bar-wrap { margin-top: 14px; }
.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-4);
  margin-bottom: 6px;
}
.progress-track {
  height: 5px;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 999px;
  transition: width 1s ease;
}

/* ─── Steps / How-to ─── */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  position: relative;
}
.steps-grid::before {
  content: '';
  position: absolute;
  top: 28px;
  left: 16.66%;
  right: 16.66%;
  height: 1px;
  background: linear-gradient(90deg, var(--teal), var(--blue));
  opacity: 0.3;
}
.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  position: relative;
  z-index: 1;
}
.step-num {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 18px;
}
.step-title { font-size: 1rem; font-weight: 700; color: var(--text-1); margin-bottom: 10px; }
.step-desc { font-size: 0.88rem; color: var(--text-3); line-height: 1.6; }

/* ─── CTA Banner ─── */
.cta-banner {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 64px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(15,118,110,0.14), transparent 70%);
  pointer-events: none;
}
.cta-banner h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--text-1);
  letter-spacing: -0.03em;
  margin-bottom: 14px;
}
.cta-banner p { font-size: 1rem; color: var(--text-3); margin-bottom: 32px; }
.cta-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

/* ─── Footer ─── */
.footer {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  padding: 48px 0 32px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
}
.footer-brand { }
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.footer-logo img { height: 28px; }
.footer-logo-text { font-size: 1.1rem; font-weight: 700; color: var(--text-1); }
.footer-tagline { font-size: 0.85rem; color: var(--text-4); line-height: 1.65; max-width: 260px; }
.footer-col h4 {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul li a { font-size: 0.87rem; color: var(--text-4); transition: color 0.15s; }
.footer-col ul li a:hover { color: var(--text-2); }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-copy { font-size: 0.8rem; color: var(--text-4); }
.footer-lang { font-size: 0.8rem; color: var(--text-4); }

/* ─── Responsive ─── */
@media (max-width: 900px) {
  .features-grid { grid-template-columns: 1fr 1fr; }
  .split-section { grid-template-columns: 1fr; gap: 32px; }
  .split-section.reverse { direction: ltr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat-item:nth-child(2) { border-right: none; }
  .stat-item:nth-child(3) { border-right: 1px solid var(--border); }
  .security-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .steps-grid::before { display: none; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
}
@media (max-width: 600px) {
  .container { padding: 0 16px; }
  .hero { padding: 56px 0 40px; }
  .features-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat-item { padding: 14px; }
  .stat-val { font-size: 1.4rem; }
  .footer-top { grid-template-columns: 1fr; }
  .cta-row { flex-direction: column; align-items: stretch; }
  .btn-primary, .btn-secondary { justify-content: center; }
  .hero-meta { gap: 14px; flex-direction: column; align-items: center; }
  .nav-actions .btn-nav-outline { display: none; }
  .footer-bottom { flex-direction: column; text-align: center; }
}