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

:root {
  --bg: #0a0f1e;
  --bg2: #0f1628;
  --bg3: #141d35;
  --cyan: #00d4ff;
  --cyan-dim: rgba(0,212,255,0.12);
  --gold: #f0b429;
  --gold-dim: rgba(240,180,41,0.12);
  --text: #e8edf5;
  --text-muted: #7a8ba8;
  --border: rgba(255,255,255,0.07);
  --radius: 12px;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
}

html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--text); font-family: var(--font-body); font-size: 16px; line-height: 1.65; overflow-x: hidden; }

.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

/* NAV */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; background: rgba(10,15,30,0.85); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.logo-text { font-family: var(--font-display); font-weight: 600; font-size: 17px; color: var(--text); letter-spacing: -0.3px; }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a { color: var(--text-muted); text-decoration: none; font-size: 14px; font-weight: 500; transition: color 0.2s; }
.nav-links a:hover { color: var(--text); }
.nav-cta { background: var(--cyan) !important; color: #000 !important; padding: 8px 18px !important; border-radius: 6px !important; font-weight: 600 !important; transition: opacity 0.2s !important; }
.nav-cta:hover { opacity: 0.85 !important; }
.nav-mobile-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
.nav-mobile-toggle span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: 0.3s; }
.nav-mobile-menu { display: none; flex-direction: column; gap: 0; background: var(--bg2); border-top: 1px solid var(--border); }
.nav-mobile-menu.open { display: flex; }
.nav-mobile-menu a { padding: 14px 24px; color: var(--text-muted); text-decoration: none; font-size: 15px; border-bottom: 1px solid var(--border); }

/* HERO */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; padding-top: 64px; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; }
#bridgeCanvas { width: 100%; height: 100%; }
.hero-content { position: relative; z-index: 2; padding: 80px 24px 60px; max-width: 760px; }
.eyebrow { font-size: 12px; font-weight: 600; letter-spacing: 2px; text-transform: uppercase; color: var(--cyan); margin-bottom: 20px; }
.hero-headline { font-family: var(--font-display); font-size: clamp(42px, 7vw, 72px); font-weight: 700; line-height: 1.08; letter-spacing: -2px; color: #fff; margin-bottom: 24px; }
.hero-headline .accent { color: var(--cyan); }
.hero-sub { font-size: 18px; color: var(--text-muted); max-width: 560px; margin-bottom: 40px; line-height: 1.7; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 64px; }
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 13px 26px; border-radius: 7px; font-weight: 600; font-size: 15px; text-decoration: none; border: none; cursor: pointer; transition: all 0.2s; font-family: var(--font-body); }
.btn-primary { background: var(--cyan); color: #000; }
.btn-primary:hover { opacity: 0.87; transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }
.btn-outline { background: transparent; color: var(--text); border: 1px solid rgba(255,255,255,0.2); width: 100%; justify-content: center; margin-top: auto; padding: 13px; }
.btn-outline:hover { border-color: var(--cyan); color: var(--cyan); }
.btn-large { padding: 15px 36px; font-size: 16px; }
.hero-stats { display: flex; align-items: center; gap: 32px; flex-wrap: wrap; }
.stat { display: flex; flex-direction: column; gap: 4px; }
.stat-num { font-family: var(--font-display); font-size: 28px; font-weight: 700; color: #fff; }
.stat-label { font-size: 12px; color: var(--text-muted); }
.stat-divider { width: 1px; height: 40px; background: var(--border); }
.hero-scroll-hint { position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 6px; color: var(--text-muted); font-size: 11px; letter-spacing: 1px; text-transform: uppercase; z-index: 2; animation: bounce 2s ease-in-out infinite; }
@keyframes bounce { 0%,100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(6px); } }

/* SECTIONS */
.section { padding: 100px 0; }
.section-header { max-width: 700px; margin: 0 auto 64px; text-align: center; }
.section-header h2 { font-family: var(--font-display); font-size: clamp(28px, 4vw, 44px); font-weight: 700; letter-spacing: -1px; line-height: 1.15; margin-bottom: 20px; color: #fff; }
.section-sub { font-size: 17px; color: var(--text-muted); line-height: 1.7; }

/* FEATURES */
.section-product { background: var(--bg2); }
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card { background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; transition: border-color 0.2s, transform 0.2s; }
.feature-card:hover { border-color: var(--cyan-dim); transform: translateY(-2px); }
.feature-icon { width: 48px; height: 48px; background: var(--cyan-dim); border-radius: 10px; display: flex; align-items: center; justify-content: center; margin-bottom: 18px; }
.feature-card h3 { font-family: var(--font-display); font-size: 17px; font-weight: 600; margin-bottom: 10px; color: #fff; }
.feature-card p { font-size: 14px; color: var(--text-muted); line-height: 1.65; }

/* TIERS */
.section-tiers { background: var(--bg); }
.tiers-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; max-width: 900px; margin: 0 auto 24px; }
.tier-card { background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); padding: 36px; display: flex; flex-direction: column; gap: 6px; }
.tier-autonomous { border-color: rgba(240,180,41,0.3); background: linear-gradient(135deg, var(--bg3) 0%, rgba(240,180,41,0.04) 100%); }
.tier-badge { display: inline-block; font-size: 10px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--cyan); background: var(--cyan-dim); padding: 4px 10px; border-radius: 4px; margin-bottom: 12px; width: fit-content; }
.tier-badge-gold { color: var(--gold); background: var(--gold-dim); }
.tier-name { font-family: var(--font-display); font-size: 22px; font-weight: 700; color: #fff; }
.tier-tagline { font-size: 14px; color: var(--text-muted); margin-bottom: 24px; }
.tier-features { list-style: none; display: flex; flex-direction: column; gap: 11px; margin-bottom: 32px; flex: 1; }
.tier-features li { font-size: 14px; color: var(--text-muted); display: flex; align-items: flex-start; gap: 10px; }
.check { color: var(--cyan); font-weight: 700; flex-shrink: 0; }
.check-gold { color: var(--gold); }
.muted { color: var(--text-muted); opacity: 0.4; flex-shrink: 0; }
.tiers-note { text-align: center; font-size: 13px; color: var(--text-muted); }

/* HOW IT WORKS */
.section-how { background: var(--bg2); }
.section-how .section-header { text-align: left; margin: 0 0 56px; max-width: none; }
.section-how .section-header .eyebrow { text-align: left; }
.how-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.diagram-wrapper { display: flex; flex-direction: column; align-items: center; gap: 12px; background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); padding: 40px 32px; }
.diag-node { background: var(--bg); border: 1px solid var(--border); border-radius: 10px; padding: 18px 24px; text-align: center; width: 100%; max-width: 200px; }
.diag-node-icon { font-size: 28px; margin-bottom: 8px; }
.diag-node-label { font-size: 13px; color: var(--text-muted); font-weight: 500; line-height: 1.4; }
.diag-node-ai .diag-node-label, .diag-node-control .diag-node-label { color: var(--text); }
.diag-arrow { display: flex; flex-direction: column; align-items: center; gap: 4px; opacity: 0.7; }
.diag-arrow-label { font-size: 11px; color: var(--cyan); letter-spacing: 0.5px; }
.how-steps { display: flex; flex-direction: column; gap: 32px; }
.how-step { display: flex; gap: 20px; }
.step-num { font-family: var(--font-display); font-size: 13px; font-weight: 700; color: var(--cyan); opacity: 0.6; padding-top: 2px; min-width: 24px; }
.step-content h3 { font-family: var(--font-display); font-size: 17px; font-weight: 600; color: #fff; margin-bottom: 8px; }
.step-content p { font-size: 14px; color: var(--text-muted); line-height: 1.65; }

/* ABOUT */
.section-about { background: var(--bg); }
.about-card { display: grid; grid-template-columns: 1fr auto; gap: 64px; align-items: start; background: var(--bg3); border: 1px solid var(--border); border-radius: 16px; padding: 56px; }
.about-text h2 { font-family: var(--font-display); font-size: clamp(24px, 3vw, 36px); font-weight: 700; letter-spacing: -0.8px; color: #fff; margin-bottom: 20px; line-height: 1.2; }
.about-text p { font-size: 15px; color: var(--text-muted); line-height: 1.75; margin-bottom: 14px; }
.about-meta { display: flex; flex-direction: column; gap: 24px; min-width: 200px; }
.meta-item { display: flex; flex-direction: column; gap: 4px; }
.meta-label { font-size: 11px; font-weight: 600; letter-spacing: 1.5px; text-transform: uppercase; color: var(--text-muted); }
.meta-value { font-family: var(--font-display); font-size: 16px; font-weight: 600; color: #fff; }

/* CONTACT */
.section-contact { background: var(--bg2); }
.contact-inner { max-width: 740px; margin: 0 auto; }
.contact-inner h2 { font-family: var(--font-display); font-size: clamp(28px, 4vw, 44px); font-weight: 700; letter-spacing: -1px; color: #fff; margin-bottom: 16px; }
.contact-inner p { font-size: 17px; color: var(--text-muted); margin-bottom: 40px; }
.contact-form { display: flex; flex-direction: column; gap: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label { font-size: 13px; font-weight: 500; color: var(--text-muted); }
.form-group input, .form-group select, .form-group textarea { background: var(--bg3); border: 1px solid var(--border); border-radius: 7px; padding: 12px 16px; color: var(--text); font-family: var(--font-body); font-size: 15px; outline: none; transition: border-color 0.2s; width: 100%; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--cyan); }
.form-group select option { background: var(--bg3); }
.form-group textarea { resize: vertical; }
.form-actions { display: flex; justify-content: flex-start; }
.form-msg { margin-top: 12px; padding: 12px 16px; border-radius: 7px; font-size: 14px; }
.form-msg.success { background: rgba(0,212,255,0.1); color: var(--cyan); border: 1px solid rgba(0,212,255,0.2); }
.form-msg.error { background: rgba(255,80,80,0.1); color: #ff6b6b; border: 1px solid rgba(255,80,80,0.2); }

/* FOOTER */
.footer { background: var(--bg); border-top: 1px solid var(--border); padding-top: 60px; }
.footer-inner { display: flex; justify-content: space-between; align-items: flex-start; gap: 48px; padding-bottom: 48px; }
.footer-brand { display: flex; flex-direction: column; gap: 12px; max-width: 280px; }
.footer-tagline { font-size: 13px; color: var(--text-muted); line-height: 1.6; }
.footer-links { display: flex; gap: 64px; }
.footer-col { display: flex; flex-direction: column; gap: 12px; }
.footer-col-title { font-size: 12px; font-weight: 600; letter-spacing: 1.5px; text-transform: uppercase; color: var(--text-muted); margin-bottom: 4px; }
.footer-col a { font-size: 14px; color: var(--text-muted); text-decoration: none; transition: color 0.2s; }
.footer-col a:hover { color: var(--cyan); }
.footer-bottom { border-top: 1px solid var(--border); padding: 20px 24px; display: flex; justify-content: space-between; font-size: 13px; color: var(--text-muted); max-width: 1160px; margin: 0 auto; }

@media (max-width: 900px) {
  .features-grid { grid-template-columns: 1fr 1fr; }
  .tiers-grid { grid-template-columns: 1fr; }
  .how-grid { grid-template-columns: 1fr; }
  .about-card { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .nav-mobile-toggle { display: flex; }
  .footer-inner { flex-direction: column; }
  .footer-links { flex-direction: column; gap: 32px; }
}
@media (max-width: 600px) {
  .features-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .hero-stats { flex-direction: column; align-items: flex-start; }
  .stat-divider { display: none; }
}