/* Telephony Landing Styles — responsive, animated, cross‑browser */

/* CSS Reset and base */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  color-scheme: dark light;
}
:root {
  --bg: #0b0e14;
  --bg-2: #0e1016;
  --panel: rgba(255,255,255,0.04);
  --panel-stroke: rgba(255,255,255,0.08);
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent-a: #60a5fa; /* blue */
  --accent-b: #a78bfa; /* purple */
  --accent-c: #34d399; /* green */
  --accent-d: #22d3ee; /* cyan */
  --shadow: 0 10px 30px rgba(0,0,0,.35), 0 2px 8px rgba(0,0,0,.35);
  --radius: 16px;
}

[data-theme="light"] {
  --bg: #f7fafc;
  --bg-2: #ffffff;
  --panel: rgba(17,24,39,0.06);
  --panel-stroke: rgba(17,24,39,0.08);
  --text: #111827;
  --muted: #4b5563;
}

body {
  margin: 0;
  font-family: ui-sans-serif, -apple-system, Segoe UI, Roboto, Helvetica, Arial, Apple Color Emoji, Segoe UI Emoji;
  line-height: 1.6;
  background: var(--bg);
  color: var(--text);
  min-height: 100svh;
  overflow-x: clip;
}

.skip-to { position: absolute; left: -9999px; top: auto; width:1px; height:1px; overflow:hidden; }
.skip-to:focus { left: 12px; top: 12px; width:auto; height:auto; z-index: 10000; background: #111827; color:#fff; padding: .5rem .75rem; border-radius: 8px; }

/* Layout */
.wrap { max-width: 1200px; margin-inline: auto; padding: 0 24px; }
.section { padding: clamp(64px, 8vw, 120px) 0; position: relative; }
.split { display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(24px, 5vw, 56px); align-items: center; }
.split.alt { grid-template-columns: 1fr 1.1fr; }
@media (max-width: 960px) { .split, .split.alt { grid-template-columns: 1fr; } }

/* Header */
.site-header { position: sticky; top: 0; z-index: 50; backdrop-filter: saturate(140%) blur(10px); -webkit-backdrop-filter: saturate(140%) blur(10px); background: linear-gradient(to bottom, rgba(12,14,20,.72), rgba(12,14,20,.28)); border-bottom: 1px solid var(--panel-stroke); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: .2px; }
.logo { width: 28px; height: 28px; display: grid; place-items: center; background: linear-gradient(135deg, var(--accent-a), var(--accent-b)); color:#0b0e14; border-radius: 7px; box-shadow: var(--shadow); }
.name { font-size: 1.05rem; }
.nav { display: flex; align-items: center; gap: 20px; }
.nav a { color: var(--text); text-decoration: none; opacity: .9; }
.nav a:hover { opacity: 1; }
.icon-btn { width: 36px; height: 36px; border-radius: 10px; border: 1px solid var(--panel-stroke); background: var(--panel); color: inherit; cursor: pointer; position: relative; }
.icon-btn::before { content: ""; position: absolute; inset: 6px; border-radius: 6px; background: radial-gradient(120% 120% at 0% 0%, var(--accent-b), transparent 60%), radial-gradient(120% 120% at 100% 100%, var(--accent-a), transparent 60%); opacity: .6; }

/* Buttons */
.btn { --b: color-mix(in oklab, var(--accent-b) 60%, var(--accent-a)); display: inline-grid; place-items: center; height: 44px; padding: 0 16px; border-radius: 12px; border: 1px solid var(--panel-stroke); color: var(--text); background: var(--panel); text-decoration: none; position: relative; overflow: hidden; box-shadow: 0 1px 0 rgba(255,255,255,.05) inset; }
.btn::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, transparent, rgba(255,255,255,.1), transparent); transform: translateX(-100%); transition: transform .6s ease; }
.btn:hover::after { transform: translateX(100%); }
.btn.primary { background: linear-gradient(135deg, var(--accent-a), var(--accent-b)); color: #0b0e14; border-color: transparent; }
.btn.ghost { background: transparent; border-color: var(--panel-stroke); }

/* Hero */
.hero h1 { font-size: clamp(2.2rem, 4.4vw, 4rem); line-height: 1.1; letter-spacing: -.02em; margin: 0 0 12px; text-wrap: balance; }
.hero .lead { font-size: clamp(1rem, 2vw, 1.25rem); color: var(--muted); max-width: 60ch; }
.accent { background: linear-gradient(135deg, var(--accent-c), var(--accent-d) 60%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.cta { display: flex; gap: 12px; margin: 24px 0 16px; flex-wrap: wrap; }
.trust { display: flex; gap: 18px; padding: 0; margin: 10px 0 0; list-style: none; color: var(--muted); font-size: .95rem; }

.visual .card.demo { position: relative; border-radius: var(--radius); background: linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02)); border: 1px solid var(--panel-stroke); box-shadow: var(--shadow); padding: 10px; transform-style: preserve-3d; perspective: 1000px; transition: transform .4s ease, box-shadow .4s ease; }
.visual .card.demo:hover { transform: translateY(-2px) rotateX(2deg) rotateY(-2deg); box-shadow: 0 12px 45px rgba(0,0,0,.5); }
.demo-svg { width: 100%; height: auto; display: block; }
.demo .badge { position: absolute; top: 16px; right: 16px; padding: 6px 10px; border-radius: 999px; font-size: .75rem; background: rgba(16,185,129,.2); color: #a7f3d0; border: 1px solid rgba(16,185,129,.35); backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); }

/* Features grid */
.features .grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; padding: 0; margin: 0; list-style: none; }
.features .card { padding: 22px; border-radius: var(--radius); background: var(--panel); border: 1px solid var(--panel-stroke); box-shadow: var(--shadow); min-height: 160px; }
.features h3 { margin-top: 0; font-size: 1.1rem; }
@media (max-width: 1100px) { .features .grid { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 600px) { .features .grid { grid-template-columns: 1fr; } }

/* How */
.terminal { background: #0f172a; color: #e5e7eb; border-radius: var(--radius); border: 1px solid var(--panel-stroke); box-shadow: var(--shadow); padding: 16px; overflow: auto; font-size: .95rem; }
.terminal code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace; }

/* Pricing */
.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.plan.card { padding: 22px; background: var(--panel); border: 1px solid var(--panel-stroke); border-radius: var(--radius); box-shadow: var(--shadow); }
.plan.highlight { outline: 1px solid color-mix(in oklab, var(--accent-b) 50%, var(--accent-a)); background: linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.02)); }
.price { font-size: 2rem; margin: 8px 0 16px; }
.price span { font-size: 1rem; color: var(--muted); }

/* CTA wide */
.cta-wide .card.wide { display: grid; place-items: center; gap: 8px; text-align: center; padding: 28px; border-radius: calc(var(--radius) + 4px); background: radial-gradient(120% 120% at 0% 0%, rgba(96,165,250,.15), transparent 60%), radial-gradient(140% 140% at 100% 100%, rgba(167,139,250,.15), transparent 60%), var(--panel); border: 1px solid var(--panel-stroke); box-shadow: var(--shadow); }

/* Footer */
.site-footer { padding: 40px 0; border-top: 1px solid var(--panel-stroke); background: linear-gradient(to top, rgba(255,255,255,.04), transparent); }
.site-footer .wrap { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.site-footer a { color: var(--muted); text-decoration: none; }

/* Reveals */
.reveal { opacity: 0; transform: translateY(16px); transition: transform .7s cubic-bezier(.2,.6,.2,1), opacity .7s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* Background system */
.bg { position: fixed; inset: 0; z-index: -1; pointer-events: none; }
#starfield { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.network { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .4; }
.orbs { position: absolute; inset: -20% -10% -10% -10%; filter: blur(30px); }
.orb { position: absolute; width: 45vmin; height: 45vmin; border-radius: 50%; opacity: .35; mix-blend-mode: screen; background: radial-gradient(circle at 30% 30%, var(--accent-a), transparent 55%), radial-gradient(circle at 70% 70%, var(--accent-b), transparent 55%); animation: drift 22s ease-in-out infinite alternate; }
.orb-a { top: 5%; left: 10%; }
.orb-b { bottom: 0; right: 5%; animation-duration: 26s; background: radial-gradient(circle at 30% 30%, var(--accent-c), transparent 55%), radial-gradient(circle at 70% 70%, var(--accent-d), transparent 55%); }
.orb-c { top: 40%; left: 50%; animation-duration: 30s; }
@keyframes drift { from { transform: translate3d(-3%, -2%, 0) scale(1); } to { transform: translate3d(3%, 2%, 0) scale(1.05); } }

/* Film grain */
.noise { position: absolute; inset: 0; pointer-events: none; opacity: .05; background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160' viewBox='0 0 100 100'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/><feColorMatrix type='saturate' values='0'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='0.25'/></svg>"); background-size: 220px 220px; mix-blend-mode: overlay; }

/* Scroll progress */
:root { --scroll: 0; }
body::before { content: ""; position: fixed; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, var(--accent-a), var(--accent-b)); transform-origin: left; transform: scaleX(var(--scroll)); z-index: 100; }

/* Utilities */
[hidden] { display: none !important; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .orbs, .network, #starfield, .reveal, .btn::after { animation: none !important; transition: none !important; }
}

/* Anchor offset */
:target { scroll-margin-top: 90px; }