:root {
  --bg: #f2f3f5;
  --surface: #ffffff;
  --text: #0e1116;
  --muted: #5b6270;
  --subtle: #8a909c;
  --border: #e3e5ea;
  --accent: #2d4fd6;
  --accent-soft: #e8edfc;
  --success: #12805c;
  --success-soft: #e3f4ec;
  --warning: #a35a00;
  --warning-soft: #fff1dc;
  --shadow: 0 10px 30px rgba(14, 17, 22, 0.07);
  --radius: 18px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0d11;
    --surface: #15181e;
    --text: #f1f3f6;
    --muted: #a3a9b5;
    --subtle: #767d8a;
    --border: #262a33;
    --accent: #6d88ff;
    --accent-soft: #1b2347;
    --success: #4cc79a;
    --success-soft: #0f2a20;
    --warning: #f0a845;
    --warning-soft: #2e2210;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0b0d11; --surface: #15181e; --text: #f1f3f6; --muted: #a3a9b5; --subtle: #767d8a;
  --border: #262a33; --accent: #6d88ff; --accent-soft: #1b2347; --success: #4cc79a;
  --success-soft: #0f2a20; --warning: #f0a845; --warning-soft: #2e2210; color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { max-width: 100%; }
.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 760px; }

/* nav */
.nav { position: sticky; top: 0; z-index: 10; backdrop-filter: saturate(1.4) blur(14px); background: color-mix(in srgb, var(--bg) 82%, transparent); border-bottom: 1px solid var(--border); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; letter-spacing: -0.5px; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand .mark { width: 30px; height: 30px; }
.mark path { fill: var(--text); }
.nav-links { display: flex; gap: 22px; align-items: center; font-size: 15px; }
.nav-links a { color: var(--muted); }
.nav-links a.btn { color: #fff; }
@media (max-width: 760px) { .nav-links a:not(.btn) { display: none; } }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 20px; border-radius: 12px; font-weight: 700; font-size: 15px; background: var(--accent); color: #fff; border: 0; cursor: pointer; }
.btn:hover { text-decoration: none; filter: brightness(1.06); }
.btn.secondary { background: var(--surface); color: var(--text); border: 1px solid var(--border); }
.btn.small { padding: 8px 14px; font-size: 14px; }

/* hero */
.hero { padding: 72px 0 48px; }
.hero .wrap { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
@media (max-width: 900px) { .hero .wrap { grid-template-columns: 1fr; } .hero { padding-top: 40px; } }
.eyebrow { display: inline-block; font-size: 13px; font-weight: 700; color: var(--accent); background: var(--accent-soft); padding: 6px 12px; border-radius: 999px; letter-spacing: 0.2px; }
h1 { font-size: clamp(36px, 6vw, 60px); line-height: 1.05; letter-spacing: -2px; margin: 18px 0 18px; }
.lead { font-size: 19px; color: var(--muted); max-width: 560px; margin: 0 0 28px; }
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.note { font-size: 14px; color: var(--subtle); margin-top: 14px; }

/* phone mock */
.phone { background: var(--surface); border-radius: 36px; box-shadow: var(--shadow); border: 1px solid var(--border); padding: 18px; max-width: 380px; margin: 0 auto; width: 100%; }
.phone-head { display: flex; align-items: center; gap: 10px; padding: 4px 6px 14px; border-bottom: 1px solid var(--border); margin-bottom: 14px; }
.avatar { width: 36px; height: 36px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); display: grid; place-items: center; font-weight: 800; }
.phone-head b { display: block; font-size: 15px; }
.phone-head small { color: var(--subtle); font-size: 12px; }
.chat { display: flex; flex-direction: column; gap: 10px; }
.bubble { max-width: 84%; padding: 10px 14px; border-radius: 18px; font-size: 14.5px; line-height: 1.45; }
.bubble.in { background: var(--bg); align-self: flex-start; border-bottom-left-radius: 6px; }
.bubble.out { background: var(--accent); color: #fff; align-self: flex-end; border-bottom-right-radius: 6px; }
.chip { align-self: flex-end; font-size: 12px; font-weight: 700; padding: 4px 10px; border-radius: 8px; margin-top: -4px; }
.chip.ok { background: var(--success-soft); color: var(--success); }
.chip.hold { background: var(--warning-soft); color: var(--warning); }

/* sections */
section { padding: 64px 0; }
h2 { font-size: clamp(28px, 4vw, 40px); letter-spacing: -1.2px; line-height: 1.1; margin: 0 0 12px; }
.section-lead { color: var(--muted); font-size: 18px; max-width: 640px; margin: 0 0 36px; }
.grid { display: grid; gap: 16px; }
.grid.three { grid-template-columns: repeat(3, 1fr); }
.grid.four { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) { .grid.three, .grid.four { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .grid.three, .grid.four { grid-template-columns: 1fr; } }
.card { background: var(--surface); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); border: 1px solid var(--border); }
.card h3 { margin: 12px 0 6px; font-size: 18px; letter-spacing: -0.3px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.icon { width: 42px; height: 42px; border-radius: 12px; background: var(--accent-soft); color: var(--accent); display: grid; place-items: center; font-size: 20px; font-weight: 800; }
.step-num { width: 34px; height: 34px; border-radius: 50%; background: var(--accent); color: #fff; display: grid; place-items: center; font-weight: 800; }

.sector { display: flex; align-items: center; gap: 12px; padding: 16px 18px; }
.sector span.e { font-size: 22px; }
.sector b { font-size: 15px; }

/* pricing */
.plans { display: grid; grid-template-columns: repeat(2, minmax(0, 360px)); gap: 16px; justify-content: center; }
@media (max-width: 760px) { .plans { grid-template-columns: 1fr; } }
.plan { position: relative; }
.plan.best { border: 2px solid var(--accent); }
.badge { position: absolute; top: -12px; right: 20px; background: var(--success); color: #fff; font-size: 12px; font-weight: 800; padding: 4px 10px; border-radius: 999px; }
.price { font-size: 38px; font-weight: 800; letter-spacing: -1.5px; margin: 8px 0 0; }
.price small { font-size: 16px; color: var(--muted); font-weight: 600; letter-spacing: 0; }
.plan ul { padding: 0; list-style: none; margin: 18px 0 0; }
.plan li { padding: 6px 0 6px 28px; position: relative; color: var(--muted); font-size: 15px; }
.plan li::before { content: "✓"; position: absolute; left: 0; color: var(--success); font-weight: 900; }

/* faq */
details { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 16px 20px; margin-bottom: 10px; }
summary { cursor: pointer; font-weight: 700; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; float: right; color: var(--subtle); font-weight: 800; }
details[open] summary::after { content: "–"; }
details p { color: var(--muted); margin: 10px 0 0; }

/* legal */
.legal { padding: 48px 0 72px; }
.legal h1 { font-size: clamp(30px, 5vw, 44px); letter-spacing: -1.2px; }
.legal h2 { font-size: 22px; letter-spacing: -0.4px; margin: 36px 0 8px; }
.legal p, .legal li { color: var(--muted); }
.legal .updated { color: var(--subtle); font-size: 14px; }
.legal hr { border: 0; border-top: 1px solid var(--border); margin: 48px 0; }

footer { border-top: 1px solid var(--border); padding: 32px 0 48px; color: var(--subtle); font-size: 14px; }
footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
footer nav { display: flex; gap: 18px; flex-wrap: wrap; }
footer a { color: var(--muted); }