:root {
  --bg: #eef3f4;
  --ink: #14242b;
  --muted: #5d717a;
  --teal: #0f6e78;
  --deep: #12343c;
  --card: #ffffff;
  --line: #d3e0e3;
  --max: 1080px;
  --sans: "Be Vietnam Pro", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.05rem;
  line-height: 1.6;
}
a { color: inherit; }
button, input, textarea { font: inherit; }
::selection { background: #c9e7ea; }

.skip { position: absolute; left: -999px; }
.skip:focus { left: 1rem; top: 1rem; z-index: 80; background: var(--ink); color: #fff; padding: 0.4rem 0.7rem; }

.app { display: grid; grid-template-columns: 260px minmax(0, 1fr); min-height: 100vh; }

.rail {
  position: sticky; top: 0; height: 100vh;
  background: #fff; border-right: 1px solid var(--line);
  display: flex; flex-direction: column; padding: 1.3rem 1.2rem 1.2rem;
}
.nav-toggle { position: absolute; opacity: 0; pointer-events: none; width: 1px; height: 1px; margin: 0; }
.rail-top { display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 0.6rem; text-decoration: none; font-weight: 700; letter-spacing: -0.03em; }
.mark { width: 2rem; height: 2rem; display: grid; place-items: center; background: var(--teal); color: #fff; border-radius: 8px; font-size: 0.78rem; }
.burger { display: none; gap: 5px; background: none; border: 0; padding: 0.3rem; }
.burger span { width: 22px; height: 2px; background: var(--ink); display: block; }
.rail-nav { display: flex; flex-direction: column; gap: 0.35rem; margin-top: 2rem; }
.rail-nav a { text-decoration: none; color: var(--muted); padding: 0.35rem 0.2rem; border-left: 2px solid transparent; padding-left: 0.6rem; }
.rail-nav a.is-on, .rail-nav a:hover { color: var(--ink); border-left-color: var(--teal); }
.rail-foot { margin-top: 1.6rem; color: var(--muted); font-size: 0.92rem; }
.rail-foot a { color: var(--teal); font-weight: 700; text-decoration: none; }

.main { min-width: 0; }
.wrap { width: min(var(--max), calc(100% - 3rem)); margin: 0 auto; }
.narrow { width: min(740px, calc(100% - 3rem)); margin: 0 auto; }

.kicker { margin: 0 0 0.7rem; color: var(--teal); letter-spacing: 0.14em; text-transform: uppercase; font-size: 0.74rem; font-weight: 700; }
h1, h2 { letter-spacing: -0.04em; font-weight: 700; }
h1 { font-size: clamp(2.6rem, 5vw, 4.4rem); line-height: 1.02; margin: 0 0 1rem; }
h2 { font-size: clamp(1.8rem, 3vw, 2.6rem); line-height: 1.08; margin: 0 0 0.7rem; }
h3 { margin: 0 0 0.3rem; font-size: 1.05rem; }
p { margin: 0 0 1rem; }
.lede { color: var(--muted); max-width: 40rem; }

.hero { padding: 3.2rem 0 1rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1rem; }
.hero-meta { color: var(--muted); }
.hero-meta a { color: var(--teal); font-weight: 700; text-decoration: none; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 0.65rem 1rem; border-radius: 999px;
  background: var(--teal); color: #fff; text-decoration: none; border: 0; font-weight: 700; cursor: pointer;
}
.btn:hover { background: #0c5c64; }
.btn-ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn-ghost:hover { background: #fff; color: var(--ink); }
.btn-light { background: #fff; color: var(--deep); }
.btn-light:hover { background: #e7f3f4; }

.stack { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.7rem; padding: 1.4rem 0 2rem; }
.chip { background: #fff; border: 1px solid var(--line); border-top: 3px solid var(--teal); border-radius: 14px; padding: 0.9rem; }
.chip b { display: block; }
.chip span { color: var(--teal); font-size: 0.82rem; font-weight: 700; }
.stack-note { grid-column: 1 / -1; margin: 0; color: var(--muted); font-size: 0.82rem; }

.section { padding: 2.2rem 0 2.6rem; }
.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.8rem; }
.plan { background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 1.1rem 1.15rem; }
.plan strong { display: block; font-size: 1.8rem; letter-spacing: -0.04em; margin: 0.2rem 0; }
.plan p { color: var(--muted); margin: 0; }
.plan.is-on { background: var(--deep); color: #fff; border-color: var(--deep); }
.plan.is-on p { color: #c9dde1; }

.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.note { background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 1rem 1.1rem; }
.note p { color: var(--muted); margin: 0.35rem 0 0; }

.band { background: var(--deep); color: #fff; padding: 2.6rem 0; }
.band-grid { display: grid; grid-template-columns: 1.3fr auto; gap: 1.2rem; align-items: center; }
.band p { color: #c9dde1; margin: 0; }

.page { padding: 2.4rem 0 3rem; }
.crumbs { color: var(--muted); font-size: 0.88rem; margin-bottom: 1rem; }
.crumbs a { color: var(--teal); text-decoration: none; }
.svc { padding: 1.3rem 0; border-top: 1px solid var(--line); }
.svc p, .prose p, .prose li, .faq p { color: var(--muted); }
.prose a, .faq a, .panel a { color: var(--teal); }
.prose h2 { font-size: 1.45rem; margin-top: 1.6rem; }
.prose table { width: 100%; border-collapse: collapse; margin: 0.4rem 0 1rem; }
.prose th, .prose td { border: 1px solid var(--line); text-align: left; padding: 0.5rem 0.6rem; vertical-align: top; background: #fff; }

.about-grid, .contact-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 1.1rem; align-items: start; }
.panel { background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 1.1rem 1.15rem; }
.facts { list-style: none; margin: 0; padding: 0; }
.facts li { display: grid; gap: 0.1rem; padding: 0.7rem 0; border-top: 1px solid var(--line); }
.facts span { color: var(--teal); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 700; }

.faq details { border-top: 1px solid var(--line); padding: 0.85rem 0; }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; font-weight: 700; }

.form { display: grid; gap: 0.75rem; }
label { display: grid; gap: 0.3rem; font-size: 0.82rem; font-weight: 700; }
input, textarea {
  width: 100%; color: var(--ink); background: var(--bg);
  border: 1px solid var(--line); border-radius: 10px; padding: 0.7rem 0.75rem;
}
input:focus, textarea:focus { outline: 2px solid #b7dde1; border-color: var(--teal); }
.fine { color: var(--muted); font-size: 0.92rem; }

.site-footer { border-top: 1px solid var(--line); padding: 2rem 0 1.2rem; background: #fff; }
.foot-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 1.2rem; }
.foot-label { color: var(--teal); letter-spacing: 0.12em; text-transform: uppercase; font-size: 0.72rem; font-weight: 700; }
.foot-links { display: grid; gap: 0.25rem; }
.foot-links a { text-decoration: none; }
.foot-links a:hover { color: var(--teal); }
.legal-row { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; color: var(--muted); font-size: 0.88rem; padding-top: 1rem; }

.cookie-banner { position: fixed; left: 0; right: 0; bottom: 0; z-index: 50; background: #fff; border-top: 1px solid var(--line); }
.cookie-inner { width: min(1100px, calc(100% - 2rem)); margin: 0 auto; padding: 0.9rem 0; display: flex; gap: 1rem; justify-content: space-between; align-items: center; }
.cookie-inner h2 { font-size: 1rem; margin: 0 0 0.2rem; letter-spacing: 0; }
.cookie-inner p { margin: 0; color: var(--muted); font-size: 0.92rem; }
.cookie-actions { display: flex; gap: 0.4rem; flex-shrink: 0; }
.check { display: flex; gap: 0.4rem; align-items: center; margin: 0.2rem 0; font-weight: 500; }
.btn-small { min-height: 38px; padding: 0.4rem 0.75rem; font-size: 0.92rem; }

@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; }
  .rail { position: sticky; height: auto; z-index: 40; padding: 0.8rem 1rem; }
  .burger { display: grid; }
  .rail-nav, .rail-foot { display: none; }
  .nav-toggle:checked ~ .rail-nav { display: flex; margin-top: 0.8rem; }
  .nav-toggle:checked ~ .rail-foot { display: block; margin-top: 1rem; }
  .stack, .plans, .pair, .band-grid, .about-grid, .contact-grid, .foot-grid, .cookie-inner {
    display: grid; grid-template-columns: 1fr;
  }
  .cookie-actions { flex-wrap: wrap; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }