:root {
  --font-sans: "Geist", "Inter", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-display: "Instrument Serif", Georgia, serif;
  --font-heading: "Source Serif 4", Georgia, serif;

  /* Brand palette */
  --blue-500:#3B82F6; --blue-600:#2563EB; --cyan-500:#06B6D4; --purple-500:#8B5CF6;
  --green-500:#10B981; --pink-500:#EC4899; --yellow-400:#FACC15;

  /* Dark-first surfaces */
  --bg:#07090F; --bg-2:#0B0F1A; --bg-3:#0F1525;
  --surface:rgba(17,24,39,0.6); --surface-2:rgba(23,31,51,0.7);
  --border:rgba(255,255,255,0.08); --border-strong:rgba(255,255,255,0.14);

  /* Text */
  --ink:#F5F7FB; --ink-2:#C7CEDA; --ink-3:#8A93A6; --ink-4:#5C6476;

  /* Gradients */
  --grad-hero: radial-gradient(ellipse 80% 50% at 50% -10%, rgba(59,130,246,0.35), transparent 60%),
               radial-gradient(ellipse 40% 30% at 20% 20%, rgba(139,92,246,0.22), transparent 70%),
               radial-gradient(ellipse 40% 30% at 80% 30%, rgba(6,182,212,0.20), transparent 70%);
  --grad-text: linear-gradient(135deg, #E6ECFF 0%, #8CB4FF 40%, #6AE3F5 70%, #B892FF 100%);
  --grad-brand: linear-gradient(135deg, #3B82F6 0%, #06B6D4 100%);
  --grad-pink: linear-gradient(135deg, #EC4899 0%, #8B5CF6 100%);
  --grad-green: linear-gradient(135deg, #10B981 0%, #06B6D4 100%);

  --r-sm:8px; --r-md:14px; --r-lg:22px; --r-xl:32px;
  --shadow-glow: 0 0 80px rgba(59,130,246,0.35);
  --shadow-card: 0 20px 60px rgba(0,0,0,0.45), inset 0 1px 0 rgba(255,255,255,0.06);
  --stats-grad-end: white;
  --card-bg: linear-gradient(145deg, rgba(32,44,72,0.88) 0%, rgba(14,19,34,0.82) 100%);
}

/* Light theme overrides */
[data-theme="light"] {
  --bg:#F7FAFF; --bg-2:#EEF3FC; --bg-3:#E4ECF8;
  --surface:rgba(255,255,255,0.7); --surface-2:rgba(255,255,255,0.85);
  --border:rgba(11,15,26,0.08); --border-strong:rgba(11,15,26,0.16);
  --ink:#0B0F1A; --ink-2:#2B3344; --ink-3:#5C6476; --ink-4:#8A93A6;
  --stats-grad-end: rgba(30,58,138,0.35);
  --shadow-card: 0 20px 60px rgba(30,58,138,0.10), inset 0 1px 0 rgba(255,255,255,0.9);
  --grad-text: linear-gradient(135deg, #1D4ED8 0%, #2563EB 40%, #0284C7 70%, #7C3AED 100%);
  --card-bg: linear-gradient(145deg, rgba(255,255,255,1) 0%, rgba(228,240,255,0.92) 100%);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin:0; padding:0;
  background:
    radial-gradient(1400px 700px at 50% -200px, rgba(59,130,246,0.18), transparent 70%),
    radial-gradient(900px 500px at 90% 10%, rgba(6,182,212,0.10), transparent 70%),
    radial-gradient(900px 500px at 10% 20%, rgba(139,92,246,0.10), transparent 70%),
    var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  letter-spacing: -0.01em;
  overflow-x: hidden;
}
[data-theme="light"] body {
  background:
    radial-gradient(1400px 700px at 50% -200px, rgba(59,130,246,0.12), transparent 70%),
    radial-gradient(900px 500px at 90% 10%, rgba(6,182,212,0.08), transparent 70%),
    radial-gradient(900px 500px at 10% 20%, rgba(139,92,246,0.06), transparent 70%),
    var(--bg);
}
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

.container { max-width: 1280px; margin: 0 auto; padding: 0 56px; }

.section-heading {
  font-family: var(--font-heading); font-weight: 500;
  font-size: clamp(42px, 5vw, 68px); line-height: 1.02;
  letter-spacing: -0.03em; margin: 16px 0 20px; color: var(--ink);
}
.section-sub { color: var(--ink-3); font-size: 18px; line-height: 1.55; max-width: 640px; }
.gradient-text { background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; padding: 0.02em 0.12em 0.26em 0.02em; margin: -0.02em -0.12em -0.26em -0.02em; -webkit-box-decoration-break: clone; box-decoration-break: clone; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 11px; padding: 0;
  background: none; border: none;
  color: var(--ink-3); font-size: 17px; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase;
}
[data-theme="light"] .eyebrow { color: #5A6B73; }
.eyebrow .dot { display: none; }
@keyframes pulse { 0%,100% { opacity:1; transform:scale(1);} 50% { opacity:.5; transform:scale(1.3);} }

.glass {
  background: linear-gradient(145deg, rgba(255,255,255,0.05), rgba(255,255,255,0.02));
  border: 1px solid var(--border);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-radius: var(--r-lg);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.12), 0 2px 4px rgba(0,0,0,0.20), 0 8px 20px rgba(0,0,0,0.28), 0 20px 48px rgba(0,0,0,0.22), 0 40px 80px rgba(0,0,0,0.12);
  transition: box-shadow 0.35s ease, transform 0.35s ease;
}
[data-theme="light"] .glass {
  box-shadow: inset 0 1px 0 rgba(255,255,255,1), 0 2px 4px rgba(15,23,42,0.06), 0 8px 20px rgba(15,23,42,0.10), 0 20px 48px rgba(15,23,42,0.09), 0 40px 80px rgba(15,23,42,0.05);
}

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 20px; border-radius: 999px; font-size: 14px; font-weight: 500; transition: all 0.2s ease; white-space: nowrap; letter-spacing: -0.005em; }
.btn-primary { background: var(--grad-brand); color: white; box-shadow: 0 8px 24px rgba(59,130,246,0.35), inset 0 1px 0 rgba(255,255,255,0.25); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 12px 32px rgba(59,130,246,0.5), inset 0 1px 0 rgba(255,255,255,0.3); }
.btn-ghost { background: rgba(255,255,255,0.04); border: 1px solid var(--border); color: var(--ink); }
.btn-ghost:hover { background: rgba(255,255,255,0.08); border-color: var(--border-strong); }
[data-theme="light"] .btn-ghost { background: rgba(255,255,255,0.8); border: 1px solid rgba(11,15,26,0.1); }
[data-theme="light"] .btn-ghost:hover { background: white; border-color: rgba(11,15,26,0.18); }

.btn-store {
  background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.12); color: var(--ink) !important;
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-radius: 14px !important;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.10), 0 4px 16px rgba(0,0,0,0.28);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.btn-store:hover { transform: translateY(-2px); border-color: rgba(59,130,246,0.40); box-shadow: inset 0 1px 0 rgba(255,255,255,0.14), 0 6px 24px rgba(0,0,0,0.32), 0 0 24px rgba(59,130,246,0.14); }
.btn-store:active { transform: translateY(0); box-shadow: inset 0 1px 0 rgba(255,255,255,0.06), 0 2px 8px rgba(0,0,0,0.25); }
[data-theme="light"] .btn-store { background: rgba(255,255,255,0.80); border: 1px solid rgba(11,15,26,0.12); color: #0B0F1A !important; box-shadow: inset 0 1px 0 rgba(255,255,255,1), 0 4px 16px rgba(15,23,42,0.10); }
[data-theme="light"] .btn-store:hover { transform: translateY(-2px); border-color: rgba(59,130,246,0.30); box-shadow: inset 0 1px 0 rgba(255,255,255,1), 0 6px 24px rgba(15,23,42,0.14), 0 0 20px rgba(59,130,246,0.08); }
[data-theme="light"] .btn-store:active { transform: translateY(0); box-shadow: inset 0 1px 0 rgba(255,255,255,0.7), 0 2px 8px rgba(15,23,42,0.10); }

.grid-bg {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black, transparent 80%);
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black, transparent 80%);
  pointer-events: none;
}
[data-theme="light"] .grid-bg { background-image: linear-gradient(rgba(11,15,26,0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(11,15,26,0.05) 1px, transparent 1px); }

.badge { display: inline-flex; align-items: center; gap: 6px; padding: 3px 9px; font-size: 11px; font-weight: 500; border-radius: 999px; letter-spacing: 0.01em; }

.ecg-path { fill: none; stroke: var(--green-500); stroke-width: 2; filter: drop-shadow(0 0 6px var(--green-500)); stroke-dasharray: 800; stroke-dashoffset: 800; animation: ecg-draw 13s linear infinite; }
@keyframes ecg-draw { 0% { stroke-dashoffset: 800; } 11.5% { stroke-dashoffset: 0; } 23% { stroke-dashoffset: -800; } 100% { stroke-dashoffset: -800; } }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.8s ease, transform 0.8s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }

.nav-theme-btn .icon-sun { display: none; }
.nav-theme-btn .icon-moon { display: block; }
[data-theme="light"] .nav-theme-btn .icon-sun { display: block; }
[data-theme="light"] .nav-theme-btn .icon-moon { display: none; }

[data-theme="light"] .mockup-card,
[data-theme="light"] .stats-card,
[data-theme="light"] .price-card,
[data-theme="light"] .testimonial-card,
[data-theme="light"] .sec-card {
  background: linear-gradient(180deg, rgba(255,255,255,0.95), rgba(250,252,255,0.85)) !important;
  border-color: rgba(11,15,26,0.08) !important;
  box-shadow: 0 20px 50px rgba(30,58,138,0.10) !important;
}
[data-theme="light"] .section-heading em { color: #2563EB; }

[data-theme="light"] .ai-chat-ai { background: rgba(255,255,255,0.92) !important; border-color: rgba(11,15,26,0.10) !important; }
[data-theme="light"] .ai-mini-chart { background: rgba(15,23,42,0.04) !important; }
[data-theme="light"] .ai-chip { background: rgba(255,255,255,0.7) !important; border-color: rgba(11,15,26,0.12) !important; color: var(--ink-2) !important; }

/* responsive */
@media (max-width: 880px) { .nav-links { display: none !important; } .nav-audience { display: none !important; } .nav-audience-mobile { display: flex !important; } }
@media (max-width: 480px) { .nav-brand-text { display: none !important; } }
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr !important; }
  .hero-phone-col { min-height: 700px !important; }
  .stats-grid { grid-template-columns: 1fr 1fr !important; gap: 24px !important; }
  .price-grid { grid-template-columns: 1fr !important; }
  .price-grid > div { transform: none !important; }
  .sec-grid { grid-template-columns: 1fr 1fr !important; }
  .foot-grid { grid-template-columns: 1.4fr 1fr 1fr 1fr !important; }
  .how-grid { grid-template-columns: 1fr 1fr !important; }
  .test-cards-grid { grid-template-columns: 1fr 1fr !important; }
  .test-cards-grid > div { transform: none !important; }
}
@media (max-width: 768px) { .ps-outer { grid-template-columns: 1fr !important; } .ps-arrow { transform: rotate(90deg); height: 56px; } }
@media (max-width: 640px) {
  .container { padding: 0 20px !important; }
  section { padding-top: 60px !important; padding-bottom: 60px !important; }
  .sec-grid { grid-template-columns: 1fr !important; }
  .foot-grid { grid-template-columns: 1fr 1fr !important; }
  .feat-cards-grid { grid-template-columns: 1fr !important; }
  .how-grid { grid-template-columns: 1fr !important; }
  .test-cards-grid { grid-template-columns: 1fr !important; }
  .hero-phone-col { min-height: 580px !important; }
  .hero-phone { transform: scale(0.84); transform-origin: center top; margin-bottom: -109px; }
}
@media (max-width: 400px) {
  .foot-grid { grid-template-columns: 1fr !important; }
  .hero-phone-col { min-height: 530px !important; }
  .hero-phone { transform: scale(0.76); transform-origin: center top; margin-bottom: -163px; }
}
@keyframes hw-travel { from { left: 0; } to { left: 100%; } }
@keyframes hw-travel-reverse { from { left: 100%; } to { left: 0; } }

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }
[data-theme="light"] ::-webkit-scrollbar-thumb { background: rgba(11,15,26,0.15); }
[data-theme="light"] ::-webkit-scrollbar-thumb:hover { background: rgba(11,15,26,0.25); }

.foot-social-x:hover { background: rgba(0,0,0,0.80) !important; border-color: rgba(255,255,255,0.22) !important; color: #fff !important; box-shadow: 0 0 12px rgba(255,255,255,0.08) !important; }
.foot-social-linkedin:hover { background: #0A66C2 !important; border-color: #0A66C2 !important; color: #fff !important; box-shadow: 0 0 14px rgba(10,102,194,0.45) !important; }
.foot-social-instagram:hover { background: linear-gradient(135deg,#833AB4 0%,#C13584 40%,#E1306C 70%,#F77737 100%) !important; border-color: #C13584 !important; color: #fff !important; box-shadow: 0 0 14px rgba(193,53,132,0.45) !important; }
[data-theme="light"] .foot-social-x:hover { background: #000 !important; }
[data-theme="light"] .foot-social-instagram:hover { background: linear-gradient(135deg,#833AB4,#C13584,#E1306C,#F77737) !important; }