/* Mark Dean — kiểu chung cho mọi trang. Màu lấy từ ảnh bìa page: nền xanh đậm, ánh xanh ngọc bên trái, cam bên phải. */
:root {
  --bg: #071233; --bg2: #050b22; --card: rgba(18, 31, 74, .72); --ink: #f3f6fd; --muted: #a9b4cf; --line: rgba(120, 150, 220, .18);
  --cyan: #22d3ee; --orange: #f97316; --orange-dark: #ea580c;
  --radius: 20px;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; min-height: 100vh; display: flex; flex-direction: column; color: var(--ink); background-color: var(--bg2);
  background-image:
    radial-gradient(700px 520px at -8% 18%, rgba(34, 211, 238, .28), rgba(34, 211, 238, 0) 70%),
    radial-gradient(700px 520px at 108% 30%, rgba(249, 115, 22, .26), rgba(249, 115, 22, 0) 70%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg2) 100%);
  background-repeat: no-repeat;
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; }
main { flex: 1; }
a { color: var(--cyan); }
img { max-width: 100%; display: block; }
svg { display: block; }
h1, h2 { line-height: 1.1; letter-spacing: -0.025em; margin: 0; }
h1 { font-size: clamp(36px, 6vw, 62px); text-wrap: balance; }
h1 em { font-style: normal; background: linear-gradient(90deg, var(--cyan), #a5b4fc 50%, var(--orange)); -webkit-background-clip: text; background-clip: text; color: transparent; }
h2 { font-size: clamp(24px, 4vw, 32px); }
p { margin: 0; }

.wrap { width: min(1080px, 100% - 32px); margin: 0 auto; }

/* đầu trang */
.top { padding: 18px 0; }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 800; font-size: 18px; }
.brand img { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; border: 2px solid rgba(34, 211, 238, .6); }
.social { display: flex; gap: 8px; }
.social a { width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; color: var(--muted); border: 1px solid var(--line); background: rgba(255, 255, 255, .03); }
.social a:hover { color: var(--ink); border-color: rgba(34, 211, 238, .55); }
.social svg { width: 18px; height: 18px; fill: currentColor; }
.social.small a { width: 34px; height: 34px; border-radius: 10px; }
.social.small svg { width: 16px; height: 16px; }

/* nút */
.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 0 24px; border-radius: 999px; font-weight: 700; text-decoration: none; background: var(--orange); color: #fff; border: 2px solid var(--orange); box-shadow: 0 8px 28px rgba(249, 115, 22, .35); }
.btn:hover { background: var(--orange-dark); border-color: var(--orange-dark); color: #fff; }
.btn.ghost { background: rgba(255, 255, 255, .03); color: var(--ink); border-color: var(--line); box-shadow: none; }
.btn.ghost:hover { border-color: rgba(34, 211, 238, .6); }

/* phần đầu trang chủ */
.hero { padding: 40px 0 56px; }
.hero .wrap { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: 56px; align-items: center; }
.pill { display: inline-block; padding: 6px 14px; border-radius: 999px; border: 1px solid var(--line); background: rgba(255, 255, 255, .04); font-weight: 700; font-size: 14.5px; color: var(--muted); margin-bottom: 20px; }
.pill span { color: var(--orange); }
.hero .lead { color: var(--muted); font-size: 19px; margin-top: 20px; max-width: 46ch; }
.hero-photo { position: relative; justify-self: center; width: min(420px, 100%); }
.frame { padding: 3px; border-radius: 28px; background: linear-gradient(135deg, var(--cyan), rgba(99, 102, 241, .6) 50%, var(--orange)); box-shadow: 0 0 60px rgba(34, 211, 238, .22), 0 30px 80px rgba(0, 0, 0, .45); }
.frame img { width: 100%; height: auto; aspect-ratio: 1; object-fit: cover; border-radius: 25px; }

/* số liệu */
.stats .wrap { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); overflow: hidden; }
.stat { padding: 22px 24px; }
.stat + .stat { border-left: 1px solid var(--line); }
.stat b { display: block; font-size: 30px; letter-spacing: -0.02em; }
.stat span { color: var(--muted); font-size: 15px; }

/* thẻ */
.section { padding: 48px 0 8px; }
.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 22px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.card b { display: block; font-size: 18px; margin: 14px 0 6px; }
.card p { color: var(--muted); font-size: 15.5px; }
.card .ic { width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center; color: var(--cyan); background: rgba(34, 211, 238, .1); border: 1px solid rgba(34, 211, 238, .25); }
.card .ic svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

/* sắp có quà */
.soon { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; padding: 32px; border-radius: var(--radius); border: 1px solid rgba(249, 115, 22, .35);
  background: radial-gradient(500px 220px at 0% 0%, rgba(34, 211, 238, .16), rgba(34, 211, 238, 0) 70%), radial-gradient(500px 220px at 100% 100%, rgba(249, 115, 22, .2), rgba(249, 115, 22, 0) 70%), var(--card); }
.soon > div:first-child { max-width: 560px; }
.soon p { color: var(--muted); margin-top: 8px; }
.soon .tag { display: inline-block; margin: 0 0 8px; color: var(--orange); font-weight: 800; font-size: 13px; letter-spacing: .08em; text-transform: uppercase; }
.soon .actions { margin-top: 0; }

/* trang chữ (404) */
.page { padding: 64px 0; text-align: center; }
.page .narrow { width: min(720px, 100% - 32px); margin: 0 auto; }
.page h1 { margin: 0 auto 14px; }
.page p { color: var(--muted); }
.page .actions { justify-content: center; }

/* cuối trang */
.foot { border-top: 1px solid var(--line); padding: 24px 0 32px; color: var(--muted); font-size: 14.5px; margin-top: 56px; }
.foot .wrap { display: flex; flex-wrap: wrap; gap: 12px 18px; align-items: center; justify-content: space-between; }
.foot a { color: var(--muted); }

@media (max-width: 820px) {
  body { font-size: 16px; }
  .hero { padding: 16px 0 40px; }
  .hero .wrap { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .hero-photo { order: -1; width: min(300px, 78%); }
  .stats .wrap { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat + .stat { border-left: 0; }
  .stat:nth-child(even) { border-left: 1px solid var(--line); }
  .stat:nth-child(n+3) { border-top: 1px solid var(--line); }
  .stat b { font-size: 26px; }
  .stat span { font-size: 14px; }
  .stat { padding: 18px 20px; }
  .cards { grid-template-columns: minmax(0, 1fr); }
  .card { padding: 20px; }
  .soon { padding: 24px; }
}