/* ============================================================
   trolyao.ai Landing — Premium Design System
   ============================================================ */
:root {
  --bg-0: #050810;
  --bg-1: #0a0f1e;
  --bg-2: #111827;
  --bg-card: rgba(15, 23, 42, 0.6);
  --bg-card-hover: rgba(22, 33, 62, 0.8);
  --border: rgba(99, 102, 241, 0.12);
  --border-hover: rgba(99, 102, 241, 0.35);
  --text-1: #f1f5f9;
  --text-2: #a1adc4;
  --text-3: #64748b;
  --accent: #6366f1;
  --accent-l: #818cf8;
  --violet: #8b5cf6;
  --cyan: #22d3ee;
  --green: #34d399;
  --grad: linear-gradient(135deg, #6366f1, #8b5cf6 50%, #22d3ee);
  --grad-subtle: linear-gradient(135deg, rgba(99,102,241,.15), rgba(139,92,246,.08));
  --glass: rgba(255,255,255,.03);
  --glass-border: rgba(255,255,255,.06);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', monospace;
  --ease: cubic-bezier(.4,0,.2,1);
  --max-w: 1200px;
}

*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; -webkit-font-smoothing:antialiased; }
body { font-family:var(--font); background:var(--bg-0); color:var(--text-1); line-height:1.7; overflow-x:hidden; }
.container { max-width:var(--max-w); margin:0 auto; padding:0 24px; }
a { color:inherit; text-decoration:none; }
img { max-width:100%; height:auto; display:block; }

/* ─── BUTTONS ─── */
.btn { display:inline-flex; align-items:center; gap:8px; padding:12px 24px; border-radius:12px; font-family:var(--font); font-size:15px; font-weight:600; cursor:pointer; transition:all .25s var(--ease); border:1.5px solid transparent; white-space:nowrap; }
.btn-primary { background:var(--grad); color:#fff; box-shadow:0 4px 24px rgba(99,102,241,.3); }
.btn-primary:hover { box-shadow:0 8px 36px rgba(99,102,241,.5); transform:translateY(-2px); }
.btn-glass { background:rgba(255,255,255,.04); color:var(--text-1); border-color:var(--glass-border); backdrop-filter:blur(8px); }
.btn-glass:hover { background:rgba(99,102,241,.1); border-color:var(--accent); }
.btn-ghost { background:transparent; color:var(--text-2); border:none; padding:10px 16px; }
.btn-ghost:hover { color:var(--text-1); }
.btn-xl { padding:16px 36px; font-size:16px; border-radius:16px; }
.btn-full { width:100%; justify-content:center; }
.btn-shine { position:relative; overflow:hidden; }
.btn-shine::after { content:''; position:absolute; top:0; left:-100%; width:60%; height:100%; background:linear-gradient(90deg,transparent,rgba(255,255,255,.15),transparent); transition:none; }
.btn-shine:hover::after { left:120%; transition:left .6s var(--ease); }

/* ─── NAV ─── */
.nav { position:fixed; top:0; left:0; right:0; z-index:1000; padding:16px 0; transition:all .3s var(--ease); }
.nav.scrolled { background:rgba(5,8,16,.9); backdrop-filter:blur(24px); border-bottom:1px solid var(--glass-border); padding:10px 0; }
.nav-inner { display:flex; align-items:center; justify-content:space-between; }
.nav-logo { display:inline-flex; align-items:center; gap:8px; font-size:22px; font-weight:800; line-height:1; }
.logo-glyph { width:36px; height:36px; border-radius:10px; background:var(--grad); display:flex; align-items:center; justify-content:center; font-size:18px; box-shadow:0 4px 16px rgba(99,102,241,.3); overflow:hidden; padding:2px; }
.logo-img { width:100%; height:100%; object-fit:contain; border-radius:8px; }
.nav-logo-img { height:44px; width:auto; object-fit:contain; transition:transform .2s var(--ease),filter .2s; filter:drop-shadow(0 2px 8px rgba(99,102,241,.25)); }
.nav-logo-img:hover { transform:scale(1.05); filter:drop-shadow(0 4px 16px rgba(99,102,241,.4)); }
.nav-logo-icon { height:48px; width:auto; object-fit:contain; filter:drop-shadow(0 2px 8px rgba(99,102,241,.25)); transition:transform .2s var(--ease),filter .2s; flex-shrink:0; }
.nav-logo:hover .nav-logo-icon { transform:scale(1.08); filter:drop-shadow(0 4px 16px rgba(99,102,241,.4)); }
.footer-brand .nav-logo-icon { height:64px; }
.logo-text { display:flex; align-items:center; line-height:1; }
.logo-dot { color:var(--accent-l); }
.nav-links { display:flex; gap:32px; }
.nav-links a { font-size:14px; font-weight:500; color:var(--text-2); transition:color .2s; }
.nav-links a:hover { color:var(--text-1); }
.nav-actions { display:flex; align-items:center; gap:8px; }
.nav-mobile-toggle { display:none; background:none; border:none; cursor:pointer; padding:8px; }
.nav-mobile-toggle span { display:block; width:24px; height:2px; background:var(--text-2); margin:5px 0; border-radius:2px; transition:all .3s; }

/* ─── HERO ─── */
.hero { position:relative; padding:160px 0 100px; overflow:hidden; }
.hero-mesh { position:absolute; inset:0; background-image:linear-gradient(rgba(255,255,255,.015) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.015) 1px,transparent 1px); background-size:64px 64px; mask-image:radial-gradient(ellipse 80% 60% at 50% 40%,black 20%,transparent 70%); }
.hero-orbs { position:absolute; inset:0; pointer-events:none; }
.orb { position:absolute; border-radius:50%; filter:blur(100px); }
.orb-1 { width:600px; height:600px; top:-150px; left:20%; background:rgba(99,102,241,.25); animation:float 12s ease-in-out infinite; }
.orb-2 { width:400px; height:400px; bottom:-100px; right:10%; background:rgba(34,211,238,.15); animation:float 15s ease-in-out infinite reverse; }
.orb-3 { width:300px; height:300px; top:30%; right:30%; background:rgba(139,92,246,.12); animation:float 10s ease-in-out infinite 2s; }
@keyframes float { 0%,100%{transform:translateY(0) scale(1)} 50%{transform:translateY(-30px) scale(1.05)} }

.hero-grid { display:grid; grid-template-columns:1fr 1fr; gap:60px; align-items:center; position:relative; }
.hero-content { position:relative; z-index:2; }
.hero-badge { display:inline-flex; align-items:center; gap:10px; padding:8px 20px; border-radius:100px; background:rgba(99,102,241,.08); border:1px solid rgba(99,102,241,.2); font-size:13px; font-weight:500; color:var(--accent-l); margin-bottom:28px; }
.badge-pulse { width:8px; height:8px; border-radius:50%; background:var(--green); animation:pulse 2s infinite; }
@keyframes pulse { 0%,100%{opacity:1;box-shadow:0 0 0 0 rgba(52,211,153,.4)} 50%{opacity:.6;box-shadow:0 0 0 6px rgba(52,211,153,0)} }
.hero-title { font-size:clamp(36px,5vw,60px); font-weight:900; line-height:1.1; letter-spacing:-.03em; margin-bottom:20px; }
.gradient-text { background:var(--grad); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.hero-huge { font-size:clamp(56px,8vw,96px); display:block; line-height:1; letter-spacing:-.04em; font-weight:900; text-transform:uppercase; filter:drop-shadow(0 4px 24px rgba(99,102,241,.3)); }
.hero-sub-title { font-size:clamp(20px,2.5vw,28px); font-weight:600; color:var(--text-2); letter-spacing:-.01em; }
.hero-desc { font-size:17px; color:var(--text-2); line-height:1.8; margin-bottom:32px; max-width:540px; }
.hero-cta { display:flex; gap:14px; flex-wrap:wrap; margin-bottom:40px; }
.hero-metrics { display:flex; gap:24px; align-items:center; flex-wrap:wrap; }
.hm { text-align:center; }
.hm-val { display:block; font-size:24px; font-weight:800; background:var(--grad); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.hm-label { font-size:12px; color:var(--text-3); text-transform:uppercase; letter-spacing:.05em; }
.hm-sep { width:1px; height:32px; background:var(--glass-border); }

/* Hero Visual */
.hero-visual { position:relative; z-index:2; }
.hero-img-wrap { position:relative; border-radius:20px; overflow:hidden; border:1px solid var(--border); box-shadow:0 24px 80px rgba(0,0,0,.5),0 0 0 1px rgba(99,102,241,.08); }
.hero-img-glow { position:absolute; inset:-20%; background:radial-gradient(circle at 30% 40%,rgba(99,102,241,.15),transparent 60%); pointer-events:none; z-index:1; }
.hero-img { position:relative; z-index:2; width:100%; border-radius:19px; }

/* ─── ANIMATIONS ─── */
.animate-in { opacity:0; transform:translateY(24px); animation:fadeUp .7s var(--ease) forwards; }
.d1 { animation-delay:.1s; } .d2 { animation-delay:.2s; } .d3 { animation-delay:.3s; } .d4 { animation-delay:.45s; }
@keyframes fadeUp { to { opacity:1; transform:translateY(0); } }

.reveal { opacity:0; transform:translateY(30px); transition:opacity .6s var(--ease),transform .6s var(--ease); }
.reveal.visible { opacity:1; transform:translateY(0); }

/* ─── SOCIAL PROOF ─── */
.social-proof { padding:48px 0; border-top:1px solid var(--glass-border); border-bottom:1px solid var(--glass-border); background:rgba(255,255,255,.01); }
.sp-label { text-align:center; font-size:13px; color:var(--text-3); text-transform:uppercase; letter-spacing:.08em; margin-bottom:20px; }
.sp-logos { display:flex; justify-content:center; gap:40px; flex-wrap:wrap; }
.sp-item { font-size:14px; font-weight:600; color:var(--text-2); opacity:.7; transition:opacity .3s; }
.sp-item:hover { opacity:1; }

/* ─── SECTION COMMON ─── */
.section-head { text-align:center; margin-bottom:64px; }
.section-eyebrow { display:inline-block; padding:6px 16px; border-radius:100px; background:rgba(99,102,241,.08); border:1px solid rgba(99,102,241,.18); font-size:13px; font-weight:600; color:var(--accent-l); margin-bottom:16px; letter-spacing:.02em; }
.section-title { font-size:clamp(28px,4vw,44px); font-weight:800; letter-spacing:-.02em; line-height:1.2; margin-bottom:16px; }
.section-sub { font-size:17px; color:var(--text-2); max-width:600px; margin:0 auto; }

/* ─── FEATURES ─── */
.features { padding:100px 0; }

/* Showcase (wide feature card with image) */
.feat-showcase { display:grid; grid-template-columns:1fr 1fr; gap:48px; align-items:center; background:var(--grad-subtle); border:1px solid var(--border); border-radius:24px; padding:48px; margin-bottom:40px; position:relative; overflow:hidden; }
.feat-showcase-content { position:relative; z-index:2; }
.feat-tag { display:inline-block; padding:4px 12px; border-radius:6px; background:rgba(99,102,241,.15); color:var(--accent-l); font-size:12px; font-weight:700; text-transform:uppercase; letter-spacing:.06em; margin-bottom:16px; }
.feat-showcase h3 { font-size:28px; font-weight:800; margin-bottom:14px; }
.feat-showcase p { color:var(--text-2); font-size:16px; line-height:1.8; margin-bottom:20px; }
.feat-highlights { display:flex; flex-wrap:wrap; gap:12px; }
.feat-highlights span { padding:6px 14px; border-radius:8px; background:rgba(255,255,255,.04); border:1px solid var(--glass-border); font-size:13px; color:var(--text-2); }
.feat-showcase-img { position:relative; z-index:2; }
.feat-showcase-img img { border-radius:16px; border:1px solid var(--border); box-shadow:0 16px 48px rgba(0,0,0,.3); }

/* Feature cards grid */
.feat-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:20px; }
.feat-card { padding:32px; border-radius:20px; background:var(--bg-card); border:1px solid var(--border); transition:all .35s var(--ease); }
.feat-card:hover { background:var(--bg-card-hover); border-color:var(--border-hover); transform:translateY(-4px); box-shadow:0 20px 60px rgba(0,0,0,.3); }
.feat-icon { font-size:32px; margin-bottom:16px; }
.feat-card h3 { font-size:18px; font-weight:700; margin-bottom:10px; }
.feat-card p { color:var(--text-2); font-size:14px; line-height:1.7; }
.feat-card code { background:rgba(99,102,241,.12); padding:2px 8px; border-radius:4px; font-family:var(--mono); font-size:12px; color:var(--accent-l); }

/* ─── USE CASES ─── */
.usecases { padding:100px 0; }
.uc-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:24px; }
.uc-card { padding:36px; border-radius:24px; background:var(--bg-card); border:1px solid var(--border); transition:all .35s var(--ease); }
.uc-card:hover { border-color:var(--border-hover); box-shadow:0 20px 60px rgba(0,0,0,.3); }
.uc-header { display:flex; align-items:center; gap:14px; margin-bottom:20px; }
.uc-icon { font-size:28px; width:48px; height:48px; border-radius:14px; background:var(--grad-subtle); border:1px solid var(--border); display:flex; align-items:center; justify-content:center; }
.uc-header h3 { font-size:20px; font-weight:700; }
.uc-img { border-radius:12px; border:1px solid var(--border); margin-bottom:20px; width:100%; }
.uc-card ul { list-style:none; margin-bottom:20px; }
.uc-card li { padding:6px 0; font-size:14px; color:var(--text-2); border-bottom:1px solid var(--glass-border); }
.uc-card li:last-child { border:none; }
.uc-tools { display:flex; flex-wrap:wrap; gap:8px; }
.uc-tools span { padding:4px 12px; border-radius:6px; background:rgba(99,102,241,.08); border:1px solid rgba(99,102,241,.15); font-size:12px; color:var(--accent-l); font-weight:600; }

/* Terminal */
.uc-terminal { border-radius:12px; background:#0d1117; border:1px solid rgba(255,255,255,.06); overflow:hidden; margin-bottom:20px; }
.term-header { display:flex; gap:7px; padding:12px 16px; border-bottom:1px solid rgba(255,255,255,.04); }
.td { width:11px; height:11px; border-radius:50%; }
.uc-terminal pre { padding:16px; margin:0; font-family:var(--mono); font-size:13px; line-height:1.7; color:#e6edf3; overflow-x:auto; }
.tc { color:#6a9955; } .tk { color:#dcdcaa; } .ts { color:#4ec9b0; }

/* ─── PRICING ─── */
.pricing { padding:100px 0; background:linear-gradient(180deg,transparent,rgba(15,23,42,.3),transparent); }
.price-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:20px; align-items:start; }
.price-card { padding:36px 28px; border-radius:20px; background:var(--bg-card); border:1px solid var(--border); transition:all .35s var(--ease); position:relative; }
.price-card:hover { border-color:var(--border-hover); transform:translateY(-4px); }
.price-pop { background:var(--grad-subtle); border-color:var(--accent); box-shadow:0 8px 40px rgba(99,102,241,.15); }
.pop-badge { position:absolute; top:-13px; left:50%; transform:translateX(-50%); padding:5px 18px; border-radius:100px; background:var(--grad); color:#fff; font-size:12px; font-weight:700; white-space:nowrap; }
.price-card h3 { font-size:22px; font-weight:700; margin-bottom:8px; }
.price-val { display:flex; align-items:baseline; gap:4px; margin-bottom:8px; }
.pv-amount { font-size:38px; font-weight:900; letter-spacing:-.02em; }
.pv-period { font-size:14px; color:var(--text-3); }
.price-desc { font-size:14px; color:var(--text-2); margin-bottom:24px; }
.price-card ul { list-style:none; margin-bottom:28px; display:flex; flex-direction:column; gap:10px; }
.price-card li { font-size:14px; color:var(--text-2); }
.price-card li.dim { color:var(--text-3); opacity:.5; }

/* ─── FINAL CTA ─── */
.final-cta { padding:100px 0; }
.cta-box { position:relative; text-align:center; padding:72px 48px; border-radius:32px; background:var(--grad-subtle); border:1px solid var(--border); overflow:hidden; }
.cta-glow { position:absolute; top:-50%; left:-25%; width:150%; height:200%; background:radial-gradient(circle at 50% 80%,rgba(99,102,241,.12),transparent 50%); pointer-events:none; }
.cta-box h2 { font-size:clamp(24px,3.5vw,38px); font-weight:800; margin-bottom:16px; position:relative; z-index:1; }
.cta-box p { font-size:17px; color:var(--text-2); margin-bottom:32px; position:relative; z-index:1; }
.cta-actions { display:flex; gap:16px; justify-content:center; position:relative; z-index:1; flex-wrap:wrap; }

/* ─── FOOTER ─── */
.footer { padding:64px 0 0; border-top:1px solid var(--glass-border); }
.footer-inner { display:flex; gap:64px; flex-wrap:wrap; }
.footer-brand { flex:1 1 280px; }
.footer-brand p { color:var(--text-3); font-size:14px; margin-top:16px; line-height:1.7; }
.footer-cols { display:flex; gap:64px; flex-wrap:wrap; }
.footer-cols > div { display:flex; flex-direction:column; gap:8px; }
.footer-cols h4 { font-size:13px; font-weight:700; color:var(--text-1); text-transform:uppercase; letter-spacing:.06em; margin-bottom:6px; }
.footer-cols a { font-size:14px; color:var(--text-3); transition:color .2s; }
.footer-cols a:hover { color:var(--text-1); }
.footer-bottom { padding:28px 0; margin-top:48px; border-top:1px solid var(--glass-border); }
.footer-bottom p { font-size:13px; color:var(--text-3); }

/* ─── RESPONSIVE ─── */

/* === Tablet === */
@media(max-width:1024px) {
  .hero-grid { grid-template-columns:1fr; text-align:center; }
  .hero-content { display:flex; flex-direction:column; align-items:center; }
  .hero-desc { max-width:100%; }
  .hero-cta { justify-content:center; }
  .hero-metrics { justify-content:center; }
  .hero-visual { max-width:600px; margin:0 auto; }
  .feat-showcase { grid-template-columns:1fr; }
  .feat-grid { grid-template-columns:repeat(2,1fr); }
  .price-grid { grid-template-columns:repeat(2,1fr); }
}

/* === Mobile === */
@media(max-width:768px) {
  .container { padding:0 16px; }

  /* Nav */
  .nav-links { display:none; position:absolute; top:100%; left:0; right:0; background:rgba(5,8,16,.95); backdrop-filter:blur(24px); flex-direction:column; padding:24px; gap:16px; border-bottom:1px solid var(--glass-border); }
  .nav-links.open { display:flex; }
  .nav-mobile-toggle { display:block; }
  .nav-actions .btn-ghost { display:none; }
  .nav-actions .btn-primary { padding:8px 16px; font-size:13px; }

  /* Hero */
  .hero { padding:100px 0 50px; }
  .hero-title { font-size:28px; margin-bottom:16px; }
  .hero-huge { font-size:clamp(48px,14vw,72px) !important; }
  .hero-sub-title { font-size:clamp(16px,4vw,22px) !important; }
  .hero-desc { font-size:15px; margin-bottom:24px; }
  .hero-cta { flex-direction:column; align-items:center; gap:10px; }
  .hero-cta .btn-xl { width:100%; justify-content:center; padding:14px 24px; font-size:15px; }
  .hero-metrics { gap:16px; }
  .hm-val { font-size:20px; }
  .hm-sep { height:24px; }

  /* Social proof - swipe */
  .sp-logos {
    display:flex;
    gap:20px;
    overflow-x:auto;
    scroll-snap-type:x mandatory;
    -webkit-overflow-scrolling:touch;
    padding:0 16px 12px;
    scrollbar-width:none;
  }
  .sp-logos::-webkit-scrollbar { display:none; }
  .sp-item {
    flex:0 0 auto;
    scroll-snap-align:start;
    white-space:nowrap;
    padding:8px 16px;
    border-radius:8px;
    background:rgba(255,255,255,.03);
    border:1px solid var(--glass-border);
  }

  /* Section headings */
  .section-head { margin-bottom:40px; }
  .section-title { font-size:clamp(24px,6vw,34px); }
  .section-sub { font-size:15px; }
  .features, .usecases, .pricing { padding:64px 0; }

  /* Feature showcase */
  .feat-showcase { padding:24px; gap:24px; }
  .feat-showcase h3 { font-size:22px; }
  .feat-showcase p { font-size:14px; }
  .feat-highlights { gap:8px; }
  .feat-highlights span { font-size:12px; padding:4px 10px; }

  /* ──── SWIPER: Feature cards ──── */
  .feat-grid {
    display:flex;
    gap:16px;
    overflow-x:auto;
    scroll-snap-type:x mandatory;
    -webkit-overflow-scrolling:touch;
    padding:0 16px 16px;
    margin:0 -16px;
    scrollbar-width:none;
  }
  .feat-grid::-webkit-scrollbar { display:none; }
  .feat-card {
    flex:0 0 280px;
    scroll-snap-align:start;
    padding:24px;
  }

  /* ──── SWIPER: Use cases ──── */
  .uc-grid {
    display:flex;
    gap:16px;
    overflow-x:auto;
    scroll-snap-type:x mandatory;
    -webkit-overflow-scrolling:touch;
    padding:0 16px 16px;
    margin:0 -16px;
    scrollbar-width:none;
  }
  .uc-grid::-webkit-scrollbar { display:none; }
  .uc-card {
    flex:0 0 88vw;
    max-width:340px;
    scroll-snap-align:start;
    padding:24px;
  }

  /* ──── SWIPER: Pricing ──── */
  .price-grid {
    display:flex;
    gap:16px;
    overflow-x:auto;
    scroll-snap-type:x mandatory;
    -webkit-overflow-scrolling:touch;
    padding:0 16px 16px;
    margin:0 -16px;
    scrollbar-width:none;
    max-width:none;
    align-items:stretch;
  }
  .price-grid::-webkit-scrollbar { display:none; }
  .price-card {
    flex:0 0 280px;
    scroll-snap-align:start;
    padding:28px 20px;
  }
  .price-pop { margin-top:16px; }
  .pop-badge { top:-10px; }
  .pv-amount { font-size:30px; }

  /* CTA */
  .final-cta { padding:64px 0; }
  .cta-box { padding:48px 20px; border-radius:24px; }
  .cta-box h2 { font-size:22px; }
  .cta-box p { font-size:15px; }
  .cta-actions { flex-direction:column; align-items:center; gap:10px; }
  .cta-actions .btn-xl { width:100%; justify-content:center; }

  /* Footer */
  .footer { padding:40px 0 0; }
  .footer-inner { flex-direction:column; gap:32px; }
  .footer-cols { gap:24px; }
  .footer-bottom { padding:20px 0; margin-top:32px; }
}

/* ─── Swiper scroll indicators (mobile) ─── */
@media(max-width:768px) {
  .feat-grid::after,
  .uc-grid::after,
  .price-grid::after {
    content:'';
    flex:0 0 1px;
  }

  /* Scroll fade hints */
  .features .container,
  .usecases .container,
  .pricing .container {
    position:relative;
  }
}

/* === Small phones === */
@media(max-width:420px) {
  .hero-huge { font-size:48px !important; }
  .hero-sub-title { font-size:16px !important; }
  .feat-card { flex:0 0 260px; }
  .uc-card { flex:0 0 92vw; }
  .price-card { flex:0 0 260px; }
  .hm { min-width:0; }
  .hero-metrics { gap:12px; }
}