/* PhotoCoach AI — website tĩnh (trang chủ, privacy, terms).
   Bộ nhận diện lấy từ app: nền tối, mint #4DD4AB, Be Vietnam Pro. */
:root {
  --bg: #0B0D10;
  --surface: #14181D;
  --surface-2: #1A1F26;
  --line: #262c34;
  --ink: #F3F5F7;
  --ink-2: #A7AFBC;
  --muted: #7A838D;
  --mint: #4DD4AB;
  --mint-soft: rgba(77, 212, 171, 0.14);
  --amber: #FFB554;
  --maxw: 1080px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--mint); text-decoration: none; }
a:hover { color: #6EFFBF; }
img { max-width: 100%; display: block; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 .5em; }
p { margin: 0 0 1em; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.eyebrow {
  font-size: 13px; font-weight: 600; letter-spacing: .18em; text-transform: uppercase;
  color: var(--mint); margin: 0 0 14px;
}

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 20;
  background: rgba(11, 13, 16, 0.82); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav .wrap { display: flex; align-items: center; gap: 16px; height: 68px; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 700; color: var(--ink); font-size: 18px; white-space: nowrap; }
.brand img { width: 34px; height: 34px; border-radius: 9px; }
.nav .spacer { flex: 1; }
.nav a.link { color: var(--ink-2); font-weight: 500; font-size: 15px; }
.nav a.link:hover { color: var(--ink); }
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--mint); color: #06231B; font-weight: 700; font-size: 15px;
  padding: 11px 20px; border-radius: 999px; border: 0; cursor: pointer;
}
.btn:hover { background: #6EFFBF; color: #06231B; }
.btn.ghost { background: transparent; color: var(--ink); border: 1.5px solid var(--line); }
.btn.ghost:hover { border-color: var(--mint); color: var(--ink); }

/* Hero */
.hero { position: relative; overflow: hidden; padding: 88px 0 72px; }
.hero::before {
  content: ""; position: absolute; left: 50%; top: -120px; transform: translateX(-50%);
  width: 1200px; height: 900px; pointer-events: none;
  background: radial-gradient(ellipse at 50% 40%, rgba(77,212,171,0.20) 0%, rgba(77,212,171,0) 62%);
}
.hero .wrap { position: relative; }
.hero h1 { font-size: clamp(40px, 7vw, 76px); font-weight: 800; max-width: 900px; }
.hero .lead { font-size: clamp(18px, 2.4vw, 23px); color: var(--ink-2); max-width: 620px; margin-top: 8px; }
.hero .cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }
.hero .note { color: var(--muted); font-size: 14px; margin-top: 18px; }

/* Sections */
section { padding: 64px 0; border-top: 1px solid var(--line); }
section h2 { font-size: clamp(28px, 4vw, 40px); font-weight: 800; max-width: 720px; }
section .sub { color: var(--ink-2); font-size: 18px; max-width: 680px; }

/* Problem grid */
.cards { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; margin-top: 36px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; padding: 26px; }
.card .q { color: var(--ink); font-weight: 700; font-size: 19px; margin-bottom: 10px; }
.card p { color: var(--ink-2); font-size: 15px; margin: 0; }

/* Feature rows */
.feature { display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; align-items: center; padding: 40px 0; border-top: 1px dashed var(--line); }
.feature:first-of-type { border-top: 0; }
.feature .tag {
  display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 600;
  color: var(--mint); background: var(--mint-soft); padding: 5px 12px; border-radius: 999px; margin-bottom: 14px;
}
.feature h3 { font-size: 26px; font-weight: 800; }
.feature p { color: var(--ink-2); font-size: 16px; margin: 0; }
.feature .art {
  aspect-ratio: 4 / 3; border-radius: 18px; border: 1px solid var(--line);
  background: linear-gradient(160deg, var(--surface-2), var(--surface));
  display: flex; align-items: center; justify-content: center;
}
.feature.reverse .art { order: -1; }

/* Trust / privacy strip */
.trust { background: var(--surface); border: 1px solid var(--line); border-radius: 22px; padding: 40px; }
.trust ul { list-style: none; padding: 0; margin: 20px 0 0; display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 14px 28px; }
.trust li { position: relative; padding-left: 30px; color: var(--ink-2); font-size: 15px; }
.trust li::before {
  content: ""; position: absolute; left: 0; top: 6px; width: 18px; height: 18px; border-radius: 5px;
  background: var(--mint-soft);
  /* dấu check mint vẽ bằng SVG */
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234DD4AB' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12.5l4.5 4.5L19 7'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: center; background-size: 13px;
}

/* Pricing */
.pricing .grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; margin-top: 36px; align-items: start; }
.plan { background: var(--surface); border: 1px solid var(--line); border-radius: 20px; padding: 28px; display: flex; flex-direction: column; }
.plan.featured { border-color: var(--mint); box-shadow: 0 0 0 1px var(--mint), 0 30px 70px rgba(77,212,171,0.10); position: relative; }
.plan .badge { position: absolute; top: -13px; left: 28px; background: var(--mint); color: #06231B; font-size: 12px; font-weight: 700; letter-spacing: .04em; padding: 5px 12px; border-radius: 999px; }
.plan .pname { font-size: 15px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-2); }
.plan .price { display: flex; align-items: baseline; gap: 6px; margin: 14px 0 2px; }
.plan .price b { font-size: 44px; font-weight: 800; color: var(--ink); letter-spacing: -0.03em; }
.plan .price span { color: var(--muted); font-size: 15px; }
.plan .sub2 { color: var(--mint); font-size: 14px; font-weight: 600; min-height: 20px; }
.plan .vnd { color: var(--muted); font-size: 13px; margin-top: 2px; }
.plan ul { list-style: none; padding: 0; margin: 20px 0 24px; display: flex; flex-direction: column; gap: 10px; }
.plan li { position: relative; padding-left: 28px; color: var(--ink-2); font-size: 15px; }
.plan li::before {
  content: ""; position: absolute; left: 0; top: 4px; width: 17px; height: 17px; border-radius: 5px; background: var(--mint-soft);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234DD4AB' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12.5l4.5 4.5L19 7'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: center; background-size: 12px;
}
.plan .btn { justify-content: center; margin-top: auto; }
.pricing .foot { color: var(--muted); font-size: 14px; margin-top: 22px; text-align: center; }

/* Footer */
footer { border-top: 1px solid var(--line); padding: 48px 0; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 24px 40px; align-items: center; }
footer .flinks { display: flex; gap: 22px; flex-wrap: wrap; }
footer .flinks a { color: var(--ink-2); }
footer .flinks a:hover { color: var(--ink); }

/* Legal (privacy / terms) */
.legal { padding: 56px 0 80px; }
.legal .wrap { max-width: 800px; }
.legal h1 { font-size: clamp(32px, 5vw, 46px); font-weight: 800; }
.legal .updated { color: var(--muted); font-size: 14px; margin-bottom: 8px; }
.legal .toc { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 20px 24px; margin: 28px 0 40px; }
.legal .toc ol { margin: 8px 0 0; padding-left: 20px; color: var(--ink-2); }
.legal .toc a { color: var(--ink-2); }
.legal .toc a:hover { color: var(--mint); }
.legal h2 { font-size: 22px; font-weight: 700; margin-top: 44px; scroll-margin-top: 84px; }
.legal h3 { font-size: 17px; font-weight: 700; margin-top: 24px; color: var(--ink); }
.legal p, .legal li { color: var(--ink-2); font-size: 16px; }
.legal ul { padding-left: 22px; }
.legal li { margin-bottom: 8px; }
.legal .ph { background: rgba(255,181,84,0.16); color: #FFD9A6; padding: 1px 7px; border-radius: 5px; font-weight: 600; }
.legal .box { background: var(--surface); border: 1px solid var(--line); border-left: 3px solid var(--mint); border-radius: 12px; padding: 18px 22px; margin: 22px 0; }
.legal .box p:last-child { margin-bottom: 0; }
.legal table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 15px; }
.legal th, .legal td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
.legal th { color: var(--mint); font-size: 13px; text-transform: uppercase; letter-spacing: .06em; }
.legal td { color: var(--ink-2); }

@media (max-width: 820px) {
  .cards { grid-template-columns: 1fr; }
  .pricing .grid { grid-template-columns: 1fr; }
  .plan.featured { order: -1; }
  .feature { grid-template-columns: 1fr; gap: 22px; }
  .feature.reverse .art { order: 0; }
  .trust ul { grid-template-columns: 1fr; }
  .nav a.link { display: none; }
}