/* OVideo — giao diện website bán dùng chung. Tông xanh rêu đậm đồng bộ với app. */

:root {
  --bg: #141a15;
  --surface: #1b211c;
  --surface-2: #232b24;
  --line: #2f3a31;
  --line-2: #3a463c;
  --ink: #eaeeeb;
  --ink-2: #a9b4ac;
  --ink-3: #7f8f83;
  --accent: #8cf05a;
  --accent-2: #63c73f;
  --accent-ink: #08160b;
  --warn: #dba45c;
  --err: #ff7a70;
  --r: 14px;
  --r-lg: 20px;
  --mono: 'Cascadia Mono', Consolas, monospace;
  --wrap: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 'Segoe UI', system-ui, -apple-system, sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 12px; }
p { margin: 0 0 12px; color: var(--ink-2); }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }

/* ── Thanh điều hướng ── */
.nav {
  position: sticky; top: 0; z-index: 20;
  background: rgba(20, 26, 21, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav__in { display: flex; align-items: center; gap: 22px; height: 64px; }
.nav__brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; color: var(--ink); }
.nav__brand img { width: 30px; height: 30px; border-radius: 8px; }
.nav__links { display: flex; gap: 18px; margin-left: 10px; }
.nav__links a { color: var(--ink-2); font-size: 14.5px; }
.nav__links a:hover { color: var(--ink); text-decoration: none; }
.nav__cta { margin-left: auto; display: flex; gap: 10px; }

/* ── Nút ── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 18px; border-radius: 10px; border: 1px solid var(--line-2);
  background: var(--surface-2); color: var(--ink); font-size: 15px; font-weight: 600;
  cursor: pointer; text-decoration: none !important;
}
.btn:hover { border-color: var(--ink-3); }
.btn--primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn--primary:hover { background: #9dfd6c; }
.btn--big { padding: 14px 24px; font-size: 16.5px; }
.btn[disabled] { opacity: 0.55; cursor: not-allowed; }

/* ── Thẻ chung ── */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 22px;
}

.banner-mau {
  background: rgba(219, 164, 92, 0.14);
  border-bottom: 1px solid rgba(219, 164, 92, 0.4);
  color: #f0c891; text-align: center; font-size: 14px; padding: 9px 16px;
}

/* ── Hero ── */
.hero { padding: 74px 0 54px; position: relative; overflow: hidden; }
.hero::before {
  content: ''; position: absolute; inset: -40% 30% 40% -20%;
  background: radial-gradient(closest-side, rgba(140, 240, 90, 0.14), transparent);
  pointer-events: none;
}
.hero h1 { font-size: clamp(30px, 4.6vw, 52px); letter-spacing: -0.5px; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero__sub { font-size: 18px; max-width: 660px; }
.hero__cta { display: flex; gap: 12px; flex-wrap: wrap; margin: 26px 0 18px; }
.hero__tin { display: flex; gap: 20px; flex-wrap: wrap; font-size: 13.5px; color: var(--ink-3); }
.hero__tin span::before { content: '✓ '; color: var(--accent-2); }

/* ── Lưới ── */
.grid { display: grid; gap: 16px; }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); }

.section { padding: 54px 0; border-top: 1px solid var(--line); }
.section h2 { font-size: clamp(24px, 3vw, 34px); }
.section__sub { max-width: 640px; margin-bottom: 28px; }

.icon-vuong {
  width: 42px; height: 42px; border-radius: 12px;
  background: rgba(140, 240, 90, 0.12);
  color: var(--accent); display: grid; place-items: center;
  font-size: 20px; margin-bottom: 14px;
}
.card h3 { font-size: 18px; }
.card p:last-child { margin-bottom: 0; }

.ds-tinh { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.ds-tinh li { padding-left: 26px; position: relative; color: var(--ink-2); }
.ds-tinh li::before { content: '▸'; position: absolute; left: 6px; color: var(--accent); }
.ds-tinh b { color: var(--ink); }

/* ── Bảng giá ── */
.gia { position: relative; display: flex; flex-direction: column; }
.gia--noi { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent) inset; }
.gia__nhan {
  position: absolute; top: -11px; left: 20px; font-size: 12px; font-weight: 700;
  background: var(--accent); color: var(--accent-ink); padding: 2px 10px; border-radius: 999px;
}
.gia__so { font-size: 33px; font-weight: 800; letter-spacing: -0.5px; margin: 6px 0 2px; }
.gia__goc { color: var(--ink-3); font-size: 14px; }
.gia__goc s { color: var(--ink-3); }
.gia__giam { color: var(--accent); font-weight: 700; font-size: 13.5px; }
.gia ul { list-style: none; margin: 14px 0 20px; padding: 0; display: grid; gap: 8px; }
.gia ul li { padding-left: 24px; position: relative; color: var(--ink-2); font-size: 14.5px; }
.gia ul li::before { content: '✓'; position: absolute; left: 4px; color: var(--accent-2); }
.gia .btn { margin-top: auto; }

/* ── Bước ── */
.buoc { counter-reset: b; }
.buoc .card { position: relative; padding-top: 30px; }
.buoc .card::before {
  counter-increment: b; content: 'Bước ' counter(b);
  position: absolute; top: -12px; left: 20px; background: var(--surface-2);
  border: 1px solid var(--line-2); border-radius: 999px; font-size: 12px;
  padding: 2px 10px; color: var(--ink-2);
}

/* ── FAQ ── */
.faq details {
  border: 1px solid var(--line); border-radius: var(--r); background: var(--surface);
  padding: 14px 18px; margin-bottom: 10px;
}
.faq summary { cursor: pointer; font-weight: 600; color: var(--ink); }
.faq details p { margin: 10px 0 0; font-size: 15px; }

/* ── Chân trang ── */
.footer { border-top: 1px solid var(--line); padding: 34px 0 46px; font-size: 13.5px; color: var(--ink-3); }
.footer__in { display: flex; flex-wrap: wrap; gap: 18px; align-items: center; justify-content: space-between; }
.footer a { color: var(--ink-2); }

/* ── Trang mua / đơn ── */
.trang-mua { max-width: 760px; margin: 0 auto; padding: 44px 20px 80px; }
.khung {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 26px; margin-bottom: 18px;
}
.nhan { display: block; font-size: 13.5px; color: var(--ink-2); margin: 0 0 6px; }
.o {
  width: 100%; padding: 11px 13px; border-radius: 10px; border: 1px solid var(--line-2);
  background: var(--bg); color: var(--ink); font-size: 15px; font-family: inherit;
}
textarea.o { resize: vertical; min-height: 42px; font-family: var(--mono); }
.o:focus { outline: 2px solid rgba(140, 240, 90, 0.35); border-color: var(--accent-2); }

.chon-goi { display: grid; gap: 10px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.goi {
  border: 1px solid var(--line-2); border-radius: var(--r); padding: 14px 16px;
  cursor: pointer; background: var(--surface-2);
}
.goi--chon { border-color: var(--accent); background: rgba(140, 240, 90, 0.08); }
.goi b { display: block; font-size: 15.5px; }
.goi span { color: var(--ink-2); font-size: 14px; }

.qr { display: grid; grid-template-columns: 240px 1fr; gap: 22px; align-items: start; }
.qr img { width: 240px; height: 240px; border-radius: 12px; background: #fff; padding: 8px; }
@media (max-width: 640px) { .qr { grid-template-columns: 1fr; } .qr img { width: 200px; height: 200px; } }

.ma-ck {
  font-family: var(--mono); font-size: 24px; letter-spacing: 2px; color: var(--accent);
  background: var(--bg); border: 1px dashed var(--line-2); border-radius: 10px;
  padding: 10px 14px; display: inline-block; margin: 6px 0 12px; user-select: all;
}
.key-hop {
  font-family: var(--mono); font-size: 13px; word-break: break-all; line-height: 1.5;
  background: var(--bg); border: 1px solid var(--accent-2); border-radius: 10px;
  padding: 14px; color: var(--accent); user-select: all;
}
.trang-thai { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; }
.cham { width: 9px; height: 9px; border-radius: 50%; background: var(--warn); }
.cham--ok { background: var(--accent-2); }
.cham--err { background: var(--err); }
.muted { color: var(--ink-3); font-size: 13.5px; }
.dong { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.nhac { color: var(--warn); font-size: 14px; }
.loi { color: var(--err); font-size: 14px; }

/* ── Thẻ chọn phiên bản (OVideo Seedance+Veo3 / OVideo Muse.ai) ── */
.phien-ban { position: relative; display: flex; flex-direction: column; overflow: hidden; }
.phien-ban__mark { width: 46px; height: 46px; border-radius: 13px; margin-bottom: 14px; }
.phien-ban__the { font-size: 12px; font-weight: 700; letter-spacing: 0.6px; text-transform: uppercase; color: var(--accent); }
.phien-ban h3 { font-size: 21px; margin: 4px 0 6px; }
.phien-ban__logo-h { width: 100%; max-width: 320px; height: auto; margin: 0 0 12px; }
.phien-ban ul { list-style: none; margin: 12px 0 18px; padding: 0; display: grid; gap: 8px; }
.phien-ban ul li { padding-left: 24px; position: relative; color: var(--ink-2); font-size: 14.5px; }
.phien-ban ul li::before { content: '▸'; position: absolute; left: 4px; color: var(--accent); }
.phien-ban__cta { display: flex; gap: 10px; flex-wrap: wrap; margin-top: auto; }
.phien-ban--muse .phien-ban__the { color: #8fb0ff; }
.phien-ban--muse ul li::before { color: #8fb0ff; }
.phien-ban--muse { border-color: #2c3550; }