:root {
  --bg: #ffffff; --bg-alt: #f4f6fb; --card: #ffffff; --text: #141a2b; --muted: #5d6680; --border: #e3e7ef;
  --primary: #3b5bfd; --primary-soft: #eaeeff; --green: #17a34a; --green-soft: #e3f7ea; --orange: #d97706; --orange-soft: #fdf1dc; --red: #dc2626; --red-soft: #fde6e6;
  --hero: linear-gradient(160deg, #eef1ff 0%, #ffffff 60%);
  --shadow: 0 20px 50px -20px rgba(20, 26, 43, .25);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Inter', sans-serif;
  color: var(--text);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1120; --bg-alt: #121729; --card: #171c2c; --text: #e8ebf4; --muted: #98a0b7; --border: #262d42;
    --primary-soft: #222b4d; --green-soft: #12301f; --orange-soft: #33270f; --red-soft: #3a1717;
    --hero: linear-gradient(160deg, #161d3a 0%, #0d1120 60%);
    --shadow: 0 20px 50px -20px rgba(0, 0, 0, .6);
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); line-height: 1.55; font-size: 16px; }
a { color: var(--primary); }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.wrap.narrow { max-width: 760px; }
.muted { color: var(--muted); }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; font: inherit; font-size: 15px; font-weight: 600; text-decoration: none; color: var(--text);
  background: var(--card); border: 1px solid var(--border); padding: 9px 16px; border-radius: 10px; cursor: pointer; white-space: nowrap; }
.btn:hover { border-color: var(--primary); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; border-color: transparent; }
.btn.lg { padding: 13px 22px; font-size: 16px; border-radius: 12px; }
.btn:disabled { opacity: .6; cursor: wait; }

/* Nav */
.nav { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 85%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.nav-in { display: flex; align-items: center; gap: 24px; height: 64px; }
.logo { font-weight: 800; font-size: 20px; color: var(--text); text-decoration: none; white-space: nowrap; }
.logo span { color: var(--primary); }
.logo.small { font-size: 16px; }
.links { display: flex; gap: 22px; flex: 1; }
.links a { color: var(--muted); text-decoration: none; font-size: 15px; }
.links a:hover { color: var(--text); }
.nav-actions { display: flex; align-items: center; gap: 8px; margin-left: auto; }
#lang { font: inherit; font-size: 14px; color: var(--text); background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 6px 8px; }

/* Hero */
.hero { background: var(--hero); padding: 72px 0 80px; overflow: hidden; }
.hero-in { display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: center; }
.pill { display: inline-block; background: var(--primary-soft); color: var(--primary); font-weight: 600; font-size: 13px; padding: 5px 12px; border-radius: 99px; }
h1 { font-size: clamp(32px, 4.6vw, 52px); line-height: 1.1; letter-spacing: -.02em; margin: 18px 0 16px; }
.lead { font-size: 18px; color: var(--muted); margin: 0 0 28px; max-width: 560px; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }
.ticks { list-style: none; padding: 0; margin: 28px 0 0; display: flex; flex-wrap: wrap; gap: 10px 22px; color: var(--muted); font-size: 15px; }
.ticks li::before { content: '✓'; color: var(--green); font-weight: 800; margin-right: 6px; }

.hero-visual { position: relative; min-height: 380px; }
.mock { background: var(--card); border: 1px solid var(--border); border-radius: 16px; box-shadow: var(--shadow); }
.panel-mock { padding: 0 0 14px; width: 92%; }
.mock-bar { display: flex; align-items: center; gap: 6px; padding: 12px 16px; border-bottom: 1px solid var(--border); font-weight: 700; font-size: 14px; }
.mock-bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--border); }
.mock-bar span { margin-left: 8px; }
.mock-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; padding: 14px 16px; }
.mock-stats div { background: var(--bg-alt); border-radius: 10px; padding: 10px; }
.mock-stats b { display: block; font-size: 24px; }
.mock-stats small { color: var(--muted); font-size: 12px; }
.mock-stats .g b { color: var(--green); } .mock-stats .o b { color: var(--orange); } .mock-stats .r b { color: var(--red); }
.mock-rows { padding: 0 16px; display: flex; flex-direction: column; gap: 8px; }
.mock-rows div { display: grid; grid-template-columns: 30px 1fr auto auto; align-items: center; gap: 10px; font-size: 14px; padding: 6px 0; border-bottom: 1px solid var(--border); }
.mock-rows div:last-child { border-bottom: none; }
.mock-rows em { font-style: normal; font-variant-numeric: tabular-nums; color: var(--muted); }
.mock-rows s { text-decoration: none; font-size: 12px; font-weight: 600; padding: 3px 8px; border-radius: 99px; }
.mock-rows s.ok { background: var(--green-soft); color: var(--green); }
.mock-rows s.late { background: var(--orange-soft); color: var(--orange); }
.av { width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; background: var(--primary-soft); color: var(--primary); font-weight: 700; font-size: 13px; }
.tg-mock { position: absolute; right: 0; bottom: 0; width: 290px; padding: 12px; background: #e7eef7; }
@media (prefers-color-scheme: dark) { .tg-mock { background: #0f1a2a; } }
.tg-head { display: flex; align-items: center; gap: 8px; font-size: 14px; margin-bottom: 8px; color: var(--text); }
.tg-ava { width: 28px; height: 28px; border-radius: 50%; background: var(--primary); color: #fff; display: grid; place-items: center; font-size: 14px; }
.bubble { background: var(--card); margin: 6px 0 0; padding: 8px 11px; border-radius: 12px 12px 12px 4px; font-size: 13.5px; }

/* Sections */
.sec { padding: 84px 0; }
.sec.alt { background: var(--bg-alt); }
h2 { font-size: clamp(26px, 3.2vw, 36px); letter-spacing: -.01em; line-height: 1.2; margin: 0 0 12px; text-align: center; }
.sec-sub { color: var(--muted); text-align: center; font-size: 17px; margin: 0 auto 44px; max-width: 620px; }
.sec-sub.left { text-align: left; margin-left: 0; }
h3 { font-size: 18px; margin: 0 0 8px; }

.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.steps li { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 26px; }
.steps span { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 12px; background: var(--primary); color: #fff; font-weight: 800; margin-bottom: 16px; }
.steps p, .features p { color: var(--muted); margin: 0; font-size: 15px; }

.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 40px; }
.features article { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 24px; }
.ic { font-size: 26px; margin-bottom: 12px; }

.bot-in, .demo-in { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; align-items: start; }
.bot-in h2, .demo-in h2 { text-align: left; }
.roles { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.role { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 24px; }
.role ul { margin: 0; padding-left: 20px; color: var(--muted); font-size: 15px; display: flex; flex-direction: column; gap: 8px; }

details { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 4px 20px; margin-top: 12px; }
summary { cursor: pointer; font-weight: 600; padding: 14px 0; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: '+'; color: var(--primary); font-size: 22px; line-height: 1; }
details[open] summary::after { content: '–'; }
details p { color: var(--muted); margin: 0 0 16px; }
#faq h2 { margin-bottom: 28px; }

.demo-card { background: var(--card); border: 1px solid var(--border); border-radius: 18px; padding: 26px; box-shadow: var(--shadow); display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.demo-card label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); font-weight: 600; }
.demo-card .full { grid-column: 1 / -1; }
.demo-card input, .demo-card select, .demo-card textarea { font: inherit; font-size: 15px; color: var(--text); background: var(--bg); border: 1px solid var(--border); border-radius: 10px; padding: 11px 12px; min-width: 0; resize: vertical; }
.demo-card input:focus, .demo-card select:focus, .demo-card textarea:focus { outline: 3px solid var(--primary-soft); border-color: var(--primary); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.form-msg { margin: 0; font-size: 14px; min-height: 1.2em; }
.form-msg.ok { color: var(--green); }
.form-msg.err { color: var(--red); }

.foot { border-top: 1px solid var(--border); padding: 26px 0; font-size: 14px; }
.foot-in { display: flex; gap: 16px; align-items: center; justify-content: space-between; flex-wrap: wrap; }

@media (max-width: 960px) {
  .links { display: none; }
  .hero { padding: 48px 0 56px; }
  .hero-in, .bot-in, .demo-in { grid-template-columns: 1fr; gap: 36px; }
  .steps, .features { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .wrap { padding: 0 16px; }
  .hide-sm { display: none; }
  .nav-in { gap: 10px; }
  .steps, .features, .roles, .demo-card { grid-template-columns: 1fr; }
  .sec { padding: 60px 0; }
  .hero-visual { min-height: 0; }
  .panel-mock { width: 100%; }
  .tg-mock { position: relative; width: 100%; margin-top: 14px; }
  .mock-stats { grid-template-columns: repeat(2, 1fr); }
}