*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #0d9488;
  --primary-dark: #0f766e;
  --primary-soft: #e6f4f3;
  --ink: #15272e;
  --muted: #5c6b71;
  --bg: #ffffff;
  --bg-soft: #f4f8f8;
  --border: #e3ebeb;
  --radius: 16px;
  --maxw: 1100px;
  --shadow: 0 10px 30px rgba(13, 148, 136, 0.10);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans Lao", sans-serif;
}

html { scroll-behavior: smooth; }
body { font-family: var(--font); color: var(--ink); background: var(--bg); line-height: 1.65; -webkit-font-smoothing: antialiased; }
a { color: var(--primary-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }
h1, h2, h3 { letter-spacing: -0.02em; line-height: 1.2; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---- nav ---- */
.nav { position: sticky; top: 0; z-index: 50; background: rgba(255, 255, 255, 0.92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand svg { width: 32px; height: 32px; }
.nav-links { display: flex; align-items: center; gap: 26px; }
.nav-links a { color: var(--muted); font-weight: 500; font-size: 15px; }
.nav-links a:hover { color: var(--primary-dark); text-decoration: none; }

/* ---- buttons ---- */
.btn { display: inline-block; padding: 13px 26px; border-radius: 999px; font-weight: 600; font-size: 15px; transition: transform .15s ease, background .15s ease, border-color .15s ease; }
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: var(--shadow); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); }
.btn-ghost { border: 1.5px solid var(--border); color: var(--ink); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary-dark); }

/* ---- hero ---- */
.hero { background: linear-gradient(180deg, var(--primary-soft) 0%, #fff 100%); padding: 88px 0 76px; text-align: center; }
.hero h1 { font-size: 52px; max-width: 780px; margin: 0 auto 20px; }
.hero .lead { font-size: 20px; color: var(--muted); max-width: 600px; margin: 0 auto 34px; }
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-note { margin-top: 18px; font-size: 13px; color: var(--muted); }

/* ---- sections ---- */
.section { padding: 76px 0; }
.section-soft { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 620px; margin: 0 auto 48px; }
.section-head h2 { font-size: 36px; margin-bottom: 12px; }
.section-head p { color: var(--muted); font-size: 17px; }
.eyebrow { color: var(--primary); font-weight: 700; font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 10px; }

/* ---- feature grid ---- */
.grid { display: grid; gap: 22px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; transition: transform .15s ease, box-shadow .15s ease; }
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.card .ico { width: 48px; height: 48px; border-radius: 12px; background: var(--primary-soft); display: flex; align-items: center; justify-content: center; font-size: 24px; margin-bottom: 16px; }
.card h3 { font-size: 19px; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 15px; }

/* ---- audience ---- */
.audience-list { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.chip { background: #fff; border: 1px solid var(--border); border-radius: 999px; padding: 10px 20px; font-size: 15px; font-weight: 500; }

/* ---- screenshots ---- */
.shots { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.shot { aspect-ratio: 9 / 19; border-radius: 20px; background: var(--primary-soft); border: 1px dashed var(--primary); display: flex; align-items: center; justify-content: center; text-align: center; color: var(--primary-dark); font-size: 13px; padding: 16px; }

/* ---- cta band ---- */
.cta-band { background: var(--primary); color: #fff; text-align: center; padding: 64px 0; }
.cta-band h2 { font-size: 34px; margin-bottom: 12px; }
.cta-band p { opacity: 0.92; font-size: 17px; margin-bottom: 28px; }
.cta-band .btn-primary { background: #fff; color: var(--primary-dark); }
.cta-band .btn-primary:hover { background: #f0fdfa; }

/* ---- footer ---- */
.footer { background: #15272e; color: #aebcc1; padding: 52px 0 32px; font-size: 14px; }
.footer-top { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 24px; margin-bottom: 32px; }
.footer .brand { color: #fff; }
.footer-links { display: flex; gap: 26px; flex-wrap: wrap; }
.footer-links a { color: #aebcc1; }
.footer-links a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid #2b3d44; padding-top: 24px; color: #7d8d93; }

/* ---- legal pages ---- */
.legal { max-width: 760px; margin: 0 auto; padding: 56px 24px 72px; }
.legal h1 { font-size: 38px; margin-bottom: 8px; }
.legal .updated { color: var(--muted); font-size: 14px; margin-bottom: 36px; }
.legal h2 { font-size: 22px; margin: 36px 0 12px; }
.legal h3 { font-size: 17px; margin: 24px 0 8px; }
.legal p, .legal li { color: #344a52; font-size: 16px; margin-bottom: 12px; }
.legal ul { padding-left: 22px; }
.legal li { margin-bottom: 8px; }
.legal a { text-decoration: underline; }
.back-link { display: inline-block; margin-bottom: 28px; font-size: 14px; font-weight: 600; }

/* ---- responsive ---- */
@media (max-width: 860px) {
  .hero { padding: 64px 0 56px; }
  .hero h1 { font-size: 38px; }
  .hero .lead { font-size: 18px; }
  .section { padding: 56px 0; }
  .section-head h2, .cta-band h2 { font-size: 28px; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .shots { grid-template-columns: repeat(2, 1fr); }
  .nav-links { gap: 16px; }
  .nav-links .nav-hide { display: none; }
  .footer-top { flex-direction: column; }
}

@media (max-width: 460px) {
  .hero h1 { font-size: 32px; }
  .shots { grid-template-columns: 1fr 1fr; }
}