:root {
  --bg: #ffffff; --band: #f1f3f6; --panel: #ffffff; --ink: #141a26; --text: #3c4352; --muted: #7a8190;
  --line: #e6e9ee; --line-strong: #cfd4dc; --brand: #1f5eff; --brand-hover: #1a4fd6; --brand-soft: #e8efff;
  --tv: #141a33; --radius: 10px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15181e; --band: #1a1d24; --panel: #1e2229; --ink: #f1f3f6; --text: #c9ced6; --muted: #8b919c;
    --line: #2b3039; --line-strong: #3a404b; --brand: #4d82ff; --brand-hover: #6694ff; --brand-soft: #1f2a44; --tv: #0b0e1a;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); line-height: 1.55;
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif; }
a { color: var(--brand); text-decoration: none; }
h1, h2, h3 { color: var(--ink); margin: 0; letter-spacing: -.015em; }
h2 { font-size: 1.7rem; font-weight: 650; margin-bottom: 1.5rem; }
h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: .35rem; }
p { margin: 0; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

.btn { display: inline-flex; align-items: center; justify-content: center; font-weight: 550; font-size: .95rem; padding: 10px 18px;
  border: 1px solid var(--line-strong); border-radius: 6px; background: var(--panel); color: var(--ink); white-space: nowrap; }
.btn:hover { border-color: var(--muted); }
.btn.primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn.primary:hover { background: var(--brand-hover); border-color: var(--brand-hover); }
.btn.block { display: flex; width: 100%; }

/* nav */
.top { border-bottom: 1px solid var(--line); background: var(--bg); position: sticky; top: 0; z-index: 5; }
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 700; font-size: 1.15rem; letter-spacing: -.01em; }
.nav nav { display: flex; align-items: center; gap: 24px; }
.nav nav a:not(.btn) { color: var(--text); font-weight: 500; font-size: .95rem; }
.nav nav a:not(.btn):hover { color: var(--ink); }
.nav .btn { padding: 7px 14px; }

/* hero */
.hero { display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; align-items: center; padding-top: 80px; padding-bottom: 88px; }
.hero h1 { font-size: 2.6rem; line-height: 1.15; font-weight: 700; letter-spacing: -.025em; }
.word { color: var(--brand); display: inline-block; transition: opacity .25s, transform .25s; }
.word.out { opacity: 0; transform: translateY(6px); }
.lede { font-size: 1.12rem; color: var(--text); margin-top: 18px; max-width: 34em; }
.cta { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }

.screen { display: flex; flex-direction: column; align-items: center; }
.tv { position: relative; width: 100%; aspect-ratio: 16 / 9; background: var(--tv); border-radius: 12px; border: 10px solid #222838; overflow: hidden; }
.stand { width: 26%; height: 10px; background: #222838; border-radius: 0 0 6px 6px; }
.slide { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: center; padding: 8%; color: #fff;
  opacity: 0; animation: cycle 12s infinite; }
.slide b { font-size: clamp(1.3rem, 3.2vw, 2.1rem); letter-spacing: -.02em; }
.slide span { font-size: clamp(.95rem, 1.8vw, 1.2rem); opacity: .85; margin-top: 6px; }
.slide em { font-style: normal; font-weight: 700; font-size: clamp(1.1rem, 2.4vw, 1.6rem); margin-top: 14px; }
.s1 { background: #1f5eff; }
.s2 { background: #141a33; animation-delay: 4s; }
.s2 em { color: #8fb0ff; }
.s3 { background: #17894b; animation-delay: 8s; }
@keyframes cycle { 0%, 30% { opacity: 1; } 33.3%, 100% { opacity: 0; } }

/* sections */
section[id] { scroll-margin-top: 64px; }
.band { background: var(--band); padding: 72px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.steps li { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.steps i { display: inline-flex; width: 28px; height: 28px; align-items: center; justify-content: center; border-radius: 6px;
  background: var(--brand-soft); color: var(--brand); font-style: normal; font-weight: 700; font-size: .9rem; margin-bottom: 14px; }
.steps p, .card p { color: var(--text); font-size: .95rem; }

.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; padding-top: 72px; padding-bottom: 72px; }
.card { border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; background: var(--panel); }

.band .lede { margin-top: -.75rem; }
.tiers { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 32px; }
.tier { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; display: flex; flex-direction: column; }
.tier h3 { font-size: 1.1rem; margin-bottom: 14px; }
.tier p { font-size: .95rem; margin-top: 14px; flex: 1; }
.price { display: flex; flex-direction: column; gap: 2px; }
.price b { font-size: 2.4rem; color: var(--ink); letter-spacing: -.03em; line-height: 1; }
.price span { color: var(--muted); font-size: .9rem; }
.monthly { margin: 18px 0; padding-top: 14px; border-top: 1px solid var(--line); color: var(--ink); font-weight: 600; font-size: .95rem; }

.included { margin-top: 20px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 24px;
  display: flex; align-items: center; gap: 28px; flex-wrap: wrap; }
.included h3 { margin: 0; font-size: 1rem; }
.included ul { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px 24px; }
.included li { padding-left: 22px; position: relative; font-size: .95rem; }
.included li::before { content: ""; position: absolute; left: 2px; top: 7px; width: 10px; height: 5px;
  border-left: 2px solid var(--brand); border-bottom: 2px solid var(--brand); transform: rotate(-45deg); }

.foot { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-top: 28px; padding-bottom: 40px; color: var(--muted); font-size: .9rem; }

@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; gap: 40px; padding-top: 48px; padding-bottom: 56px; }
  .hero h1 { font-size: 2rem; }
  .steps, .features { grid-template-columns: 1fr; }
  .tiers { grid-template-columns: 1fr 1fr; }
  .band { padding: 52px 0; }
  .features { padding-top: 52px; padding-bottom: 52px; }
}
@media (max-width: 520px) {
  .tiers { grid-template-columns: 1fr; }
  .wrap { padding: 0 16px; }
  .nav nav a:not(.btn) { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .slide { animation: none; }
  .s1 { opacity: 1; }
}