/* biabaweb.com — Docusaurus-inspired green doc-framework theme */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --green-50: #f0fdf4;
  --green-100: #dcfce7;
  --green-200: #bbf7d0;
  --green-400: #4ade80;
  --green-500: #22c55e;
  --green-600: #16a34a;
  --green-700: #15803d;
  --green-800: #166534;
  --green-900: #14532d;
  --dark: #1b1b1d;
  --dark-2: #242526;
  --dark-3: #2d2d30;
  --dark-4: #3d3d42;
  --text-primary: #1c1e21;
  --text-secondary: #525860;
  --text-muted: #71757f;
  --border: #e3e3e8;
  --border-dark: #444;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,.12);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.16);
  --font: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --max-w: 1280px;
  --nav-h: 64px;
}

html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font); color: var(--text-primary); background: #fff; line-height: 1.6; overflow-x: hidden; }

/* ===== NAVBAR ===== */
.nav {
  position: sticky; top: 0; z-index: 100;
  height: var(--nav-h);
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center;
}
.nav-inner {
  max-width: var(--max-w); margin: 0 auto; padding: 0 24px;
  width: 100%; display: flex; align-items: center; gap: 32px;
}
.nav-logo { display: flex; align-items: center; gap: 10px; text-decoration: none; flex-shrink: 0; }
.nav-logo svg { display: block; }
.nav-logo-text { font-size: 1.125rem; font-weight: 700; color: var(--dark); letter-spacing: -.3px; }
.nav-links { display: flex; align-items: center; gap: 4px; flex: 1; }
.nav-links a {
  padding: 6px 14px; border-radius: var(--radius-sm);
  font-size: .875rem; font-weight: 500; color: var(--text-secondary);
  text-decoration: none; transition: background .15s, color .15s;
}
.nav-links a:hover { background: var(--green-50); color: var(--green-700); }
.nav-actions { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.btn-outline {
  padding: 8px 18px; border-radius: var(--radius-sm);
  border: 1.5px solid var(--border); background: transparent;
  font-size: .875rem; font-weight: 500; color: var(--text-primary);
  cursor: pointer; transition: border-color .15s, color .15s;
  font-family: var(--font);
}
.btn-outline:hover { border-color: var(--green-500); color: var(--green-600); }
.btn-primary {
  padding: 8px 20px; border-radius: var(--radius-sm);
  border: none; background: var(--green-600);
  font-size: .875rem; font-weight: 600; color: #fff;
  cursor: pointer; transition: background .15s, transform .1s;
  font-family: var(--font);
}
.btn-primary:hover { background: var(--green-700); transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); }

/* ===== ANNOUNCEMENT BAR ===== */
.announce-bar {
  background: var(--green-600); color: #fff;
  text-align: center; padding: 10px 24px;
  font-size: .85rem; font-weight: 500;
}
.announce-bar a { color: #fff; font-weight: 700; text-decoration: underline; }

/* ===== HERO ===== */
.hero {
  background: linear-gradient(160deg, #f0fdf4 0%, #fff 55%, #f0fdf4 100%);
  padding: 80px 24px 72px;
  text-align: center; position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse 900px 500px at 50% -100px, rgba(34,197,94,.12) 0%, transparent 70%);
  pointer-events: none;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--green-100); color: var(--green-800);
  border: 1px solid var(--green-200);
  padding: 5px 14px; border-radius: 99px;
  font-size: .8rem; font-weight: 600; letter-spacing: .3px;
  margin-bottom: 24px;
}
.hero-badge-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green-500); }
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.75rem); font-weight: 800;
  color: var(--dark); line-height: 1.15; letter-spacing: -.04em;
  max-width: 840px; margin: 0 auto 20px;
}
.hero h1 em { font-style: normal; color: var(--green-600); }
.hero-desc {
  font-size: clamp(1rem, 2vw, 1.2rem); color: var(--text-secondary);
  max-width: 600px; margin: 0 auto 36px; line-height: 1.7;
}
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 56px; }
.btn-hero-primary {
  padding: 14px 32px; border-radius: var(--radius-md);
  border: none; background: var(--green-600); color: #fff;
  font-size: 1rem; font-weight: 700; cursor: pointer;
  transition: background .15s, transform .15s, box-shadow .15s;
  font-family: var(--font); box-shadow: 0 4px 14px rgba(22,163,74,.4);
}
.btn-hero-primary:hover { background: var(--green-700); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(22,163,74,.45); }
.btn-hero-secondary {
  padding: 14px 32px; border-radius: var(--radius-md);
  border: 1.5px solid var(--border); background: #fff; color: var(--dark);
  font-size: 1rem; font-weight: 600; cursor: pointer;
  transition: border-color .15s, transform .15s;
  font-family: var(--font);
}
.btn-hero-secondary:hover { border-color: var(--green-500); color: var(--green-700); transform: translateY(-2px); }

/* Hero browser mockup */
.hero-visual {
  max-width: 900px; margin: 0 auto;
  background: var(--dark); border-radius: var(--radius-lg);
  box-shadow: 0 24px 80px rgba(0,0,0,.22), 0 0 0 1px rgba(255,255,255,.05);
  overflow: hidden;
}
.hv-bar {
  background: var(--dark-2); padding: 12px 16px;
  display: flex; align-items: center; gap: 10px; border-bottom: 1px solid var(--dark-3);
}
.hv-dots { display: flex; gap: 6px; }
.hv-dot { width: 12px; height: 12px; border-radius: 50%; }
.hv-dot.red { background: #ff5f57; }
.hv-dot.yellow { background: #febc2e; }
.hv-dot.green { background: #28c840; }
.hv-url {
  flex: 1; background: var(--dark-3); border-radius: 6px;
  padding: 5px 12px; font-size: .75rem; color: #8a8a9a; font-family: var(--mono);
  text-align: center;
}
.hv-body { padding: 0; display: flex; min-height: 280px; }
.hv-sidebar {
  width: 200px; background: var(--dark-2); padding: 20px 14px;
  border-right: 1px solid var(--dark-3); flex-shrink: 0;
}
.hvs-section { margin-bottom: 20px; }
.hvs-title { font-size: .65rem; font-weight: 700; color: #56585f; text-transform: uppercase; letter-spacing: .8px; margin-bottom: 8px; font-family: var(--mono); }
.hvs-item {
  padding: 6px 10px; border-radius: 5px; font-size: .75rem;
  color: #a0a0b0; margin-bottom: 2px; cursor: pointer; transition: background .1s, color .1s;
}
.hvs-item:hover { background: var(--dark-3); }
.hvs-item.active { background: rgba(34,197,94,.15); color: var(--green-400); }
.hv-content { flex: 1; padding: 28px 32px; background: var(--dark); }
.hvc-breadcrumb { font-size: .7rem; color: #5a5a6a; margin-bottom: 14px; font-family: var(--mono); }
.hvc-h { font-size: 1.5rem; font-weight: 800; color: #e8e8f0; margin-bottom: 10px; }
.hvc-p { font-size: .82rem; color: #8a8a9a; line-height: 1.6; margin-bottom: 16px; }
.hvc-code {
  background: var(--dark-2); border: 1px solid var(--dark-3); border-radius: 8px;
  padding: 14px 18px; font-family: var(--mono); font-size: .78rem; color: #4ade80;
}
.hvc-code .kw { color: #7c3aed; }
.hvc-code .str { color: #22c55e; }
.hvc-code .cmt { color: #4a4a5a; }

/* ===== STATS BAND ===== */
.stats-band {
  background: var(--dark); padding: 48px 24px;
  border-top: 1px solid var(--dark-3); border-bottom: 1px solid var(--dark-3);
}
.stats-inner {
  max-width: var(--max-w); margin: 0 auto;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px;
  text-align: center;
}
.stat-item {}
.stat-num { font-size: clamp(1.8rem, 3.5vw, 2.8rem); font-weight: 800; color: var(--green-400); letter-spacing: -.03em; }
.stat-label { font-size: .82rem; color: #8a8a9a; margin-top: 4px; font-weight: 500; }

/* ===== SECTION BASE ===== */
section { padding: 72px 24px; }
.section-inner { max-width: var(--max-w); margin: 0 auto; }
.section-tag {
  display: inline-block; background: var(--green-50); color: var(--green-700);
  border: 1px solid var(--green-200); border-radius: 99px;
  padding: 4px 14px; font-size: .78rem; font-weight: 600;
  letter-spacing: .4px; text-transform: uppercase; margin-bottom: 14px;
}
.section-h { font-size: clamp(1.7rem, 3.5vw, 2.6rem); font-weight: 800; color: var(--dark); letter-spacing: -.04em; margin-bottom: 14px; }
.section-desc { font-size: 1.05rem; color: var(--text-secondary); max-width: 580px; line-height: 1.7; }

/* ===== FEATURES ===== */
.features-section { background: #fafafa; }
.features-header { text-align: center; margin-bottom: 52px; }
.features-header .section-desc { margin: 0 auto; }
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 32px 28px;
  transition: border-color .2s, box-shadow .2s, transform .2s;
}
.feature-card:hover { border-color: var(--green-300); box-shadow: 0 8px 24px rgba(34,197,94,.1); transform: translateY(-3px); }
.fc-icon {
  width: 52px; height: 52px; border-radius: var(--radius-md);
  background: var(--green-50); border: 1px solid var(--green-100);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px; font-size: 1.5rem;
}
.fc-h { font-size: 1.05rem; font-weight: 700; color: var(--dark); margin-bottom: 10px; }
.fc-p { font-size: .9rem; color: var(--text-secondary); line-height: 1.65; }

/* ===== SPLIT SECTION ===== */
.split-section { background: #fff; }
.split-wrap {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center;
}
.split-wrap.reverse { direction: rtl; }
.split-wrap.reverse > * { direction: ltr; }
.split-content {}
.split-content .section-h { font-size: clamp(1.5rem, 2.8vw, 2.2rem); }
.split-list { list-style: none; display: flex; flex-direction: column; gap: 14px; margin-top: 24px; }
.split-list li {
  display: flex; gap: 12px; align-items: flex-start;
  font-size: .95rem; color: var(--text-secondary); line-height: 1.6;
}
.split-list-icon { flex-shrink: 0; width: 22px; height: 22px; border-radius: 50%; background: var(--green-100); display: flex; align-items: center; justify-content: center; margin-top: 1px; }
.split-visual {
  background: var(--dark); border-radius: var(--radius-lg);
  padding: 32px; box-shadow: var(--shadow-lg);
  font-family: var(--mono); font-size: .82rem; overflow: hidden;
}
.sv-line { display: flex; gap: 12px; padding: 5px 0; color: #8a8a9a; }
.sv-ln { color: #3d3d50; font-size: .72rem; width: 20px; text-align: right; flex-shrink: 0; }
.sv-kw { color: #7c3aed; }
.sv-str { color: #22c55e; }
.sv-fn { color: #60a5fa; }
.sv-cm { color: #4a4a60; }
.sv-num { color: #f97316; }

/* ===== PLATFORM CARDS ===== */
.platform-section { background: var(--green-50); }
.platform-header { text-align: center; margin-bottom: 48px; }
.platform-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.platform-card {
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px 20px;
  text-align: center; transition: border-color .2s, box-shadow .2s, transform .2s;
  cursor: pointer;
}
.platform-card:hover { border-color: var(--green-400); box-shadow: 0 4px 16px rgba(34,197,94,.12); transform: translateY(-3px); }
.pc-icon { font-size: 2.4rem; margin-bottom: 14px; }
.pc-name { font-size: 1rem; font-weight: 700; color: var(--dark); margin-bottom: 6px; }
.pc-desc { font-size: .82rem; color: var(--text-muted); line-height: 1.5; margin-bottom: 16px; }
.pc-btn {
  display: inline-block; padding: 8px 20px; border-radius: var(--radius-sm);
  background: var(--green-600); color: #fff;
  font-size: .82rem; font-weight: 600; cursor: pointer;
  border: none; font-family: var(--font); transition: background .15s;
}
.pc-btn:hover { background: var(--green-700); }

/* ===== SECURITY SECTION ===== */
.security-section { background: var(--dark); }
.security-inner { max-width: var(--max-w); margin: 0 auto; }
.security-inner .section-h { color: #e8e8f0; }
.security-inner .section-desc { color: #8a8a9a; }
.security-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 48px; }
.sec-card {
  background: var(--dark-2); border: 1px solid var(--dark-3);
  border-radius: var(--radius-lg); padding: 28px;
  transition: border-color .2s;
}
.sec-card:hover { border-color: var(--green-700); }
.sec-icon { font-size: 1.8rem; margin-bottom: 14px; }
.sec-h { font-size: 1rem; font-weight: 700; color: #e0e0ec; margin-bottom: 8px; }
.sec-p { font-size: .88rem; color: #8a8a9a; line-height: 1.6; }

/* ===== CTA BANNER ===== */
.cta-banner {
  background: linear-gradient(135deg, var(--green-700) 0%, var(--green-600) 50%, var(--green-500) 100%);
  padding: 72px 24px; text-align: center;
}
.cta-banner-h {
  font-size: clamp(1.8rem, 4vw, 3rem); font-weight: 800; color: #fff;
  letter-spacing: -.04em; margin-bottom: 14px;
}
.cta-banner-p { font-size: 1.1rem; color: rgba(255,255,255,.85); margin-bottom: 36px; max-width: 560px; margin-left: auto; margin-right: auto; }
.btn-banner {
  padding: 14px 36px; border-radius: var(--radius-md);
  border: none; background: #fff; color: var(--green-700);
  font-size: 1rem; font-weight: 700; cursor: pointer;
  font-family: var(--font); transition: transform .15s, box-shadow .15s;
  box-shadow: 0 4px 14px rgba(0,0,0,.15);
}
.btn-banner:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,.2); }

/* ===== FOOTER ===== */
footer {
  background: var(--dark); border-top: 1px solid var(--dark-3);
  padding: 60px 24px 32px;
}
.footer-inner { max-width: var(--max-w); margin: 0 auto; }
.footer-top { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-brand {}
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.footer-logo-text { font-size: 1.05rem; font-weight: 700; color: #e8e8f0; }
.footer-tagline { font-size: .85rem; color: #7a7a8a; line-height: 1.65; max-width: 280px; }
.footer-col-h { font-size: .78rem; font-weight: 700; color: #5a5a6a; text-transform: uppercase; letter-spacing: .8px; margin-bottom: 14px; }
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.footer-links a { font-size: .88rem; color: #7a7a8a; text-decoration: none; transition: color .15s; }
.footer-links a:hover { color: var(--green-400); }
.footer-bottom {
  border-top: 1px solid var(--dark-3); padding-top: 24px;
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
}
.footer-copy { font-size: .82rem; color: #5a5a6a; }
.footer-legal { display: flex; gap: 20px; }
.footer-legal a { font-size: .82rem; color: #5a5a6a; text-decoration: none; transition: color .15s; }
.footer-legal a:hover { color: var(--green-400); }

/* ===== HAMBURGER / MOBILE NAV ===== */
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 6px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--dark); border-radius: 2px; transition: .25s; }
.nav-toggle span + span { margin-top: 5px; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .split-wrap { grid-template-columns: 1fr; gap: 40px; }
  .split-wrap.reverse { direction: ltr; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 36px; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; flex-direction: column; margin-left: auto; }
  .nav-actions .btn-outline { display: none; }
  .features-grid { grid-template-columns: 1fr; }
  .platform-grid { grid-template-columns: repeat(2, 1fr); }
  .security-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .hero-actions { flex-direction: column; align-items: center; }
  .hv-sidebar { display: none; }
}

@media (max-width: 480px) {
  .platform-grid { grid-template-columns: 1fr; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .hero { padding: 56px 20px 48px; }
  section { padding: 52px 20px; }
  .hv-content { padding: 20px; }
}

/* ===== UTILITY ===== */
.text-center { text-align: center; }
.mt-32 { margin-top: 32px; }
.btn-link {
  background: none; border: none; cursor: pointer; font-family: var(--font);
  color: var(--green-600); font-weight: 600; font-size: .95rem;
  display: inline-flex; align-items: center; gap: 6px; padding: 0;
}
.btn-link:hover { color: var(--green-700); }