/* Skyseer · skyseer.xyz. Nền xanh đá aventurine, chữ ngà, vàng chỉ ở điểm nhấn (một nút vàng mỗi màn).
   Phông tự để trên trang (Inter cho chữ, Manrope cho tiêu đề): không tải gì từ bên ngoài. */

@font-face { font-family: Inter; font-weight: 400; font-display: swap; src: url('/fonts/Inter-Regular.woff2') format('woff2'); }
@font-face { font-family: Inter; font-weight: 500; font-display: swap; src: url('/fonts/Inter-Medium.woff2') format('woff2'); }
@font-face { font-family: Inter; font-weight: 600; font-display: swap; src: url('/fonts/Inter-SemiBold.woff2') format('woff2'); }
@font-face { font-family: Manrope; font-weight: 600; font-display: swap; src: url('/fonts/Manrope-SemiBold.woff2') format('woff2'); }
@font-face { font-family: Manrope; font-weight: 700; font-display: swap; src: url('/fonts/Manrope-Bold.woff2') format('woff2'); }

:root {
  --night: #071F1B;
  --night-2: #0C2A25;
  --surface: #10322C;
  --raised: #153C35;
  --line: rgba(236, 214, 163, 0.14);
  --line-strong: rgba(236, 214, 163, 0.28);
  --text: #EFE9DC;
  --muted: #A6B7B0;
  --gold: #E2B76A;
  --gold-hi: #FBE3A6;
  --gold-lo: #B8842F;
  --paper: #F6F1E6;
  --paper-ink: #18302B;
  --paper-muted: #55665F;
  --paper-line: #E2D9C6;
  --radius: 22px;
  --font: Inter, system-ui, -apple-system, 'Segoe UI', Roboto, 'Noto Sans', 'Noto Sans Devanagari', sans-serif;
  --display: Manrope, Inter, system-ui, -apple-system, 'Segoe UI', sans-serif;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; background: var(--night); color: var(--text); font: 400 17px/1.65 var(--font);
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: var(--gold-hi); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; border-radius: 6px; }
.wrap { max-width: 1120px; margin: 0 auto; padding-left: max(20px, env(safe-area-inset-left)); padding-right: max(20px, env(safe-area-inset-right)); }
.skip { position: absolute; left: -999px; top: 8px; background: var(--gold); color: var(--night); padding: 8px 14px; border-radius: 8px; }
.skip:focus { left: 12px; z-index: 10; }

/* Đầu trang */
.top { position: sticky; top: 0; z-index: 5; background: rgba(7, 31, 27, 0.72); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 20px; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font: 700 19px/1 var(--display); letter-spacing: 0.01em; }
.brand img { width: 34px; height: 34px; }
.nav { display: flex; align-items: center; gap: 26px; font-size: 15px; }
.nav a { color: var(--muted); text-decoration: none; }
.nav a:hover { color: var(--text); }
.soon { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 500; color: var(--gold-hi); border: 1px solid var(--line-strong); border-radius: 999px; padding: 7px 14px; white-space: nowrap; }
.soon svg { width: 14px; height: 14px; }
@media (max-width: 760px) { .nav a { display: none; } }
@media (max-width: 600px) { .top .soon { display: none; } }

/* Mở đầu */
.hero { position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -20% -10% auto; height: 120%; pointer-events: none;
  background: radial-gradient(48% 42% at 72% 38%, rgba(29, 115, 100, 0.55), transparent 70%),
              radial-gradient(30% 30% at 74% 40%, rgba(226, 183, 106, 0.12), transparent 70%);
}
.hero .wrap { position: relative; display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); gap: 56px; align-items: center; padding-top: 88px; padding-bottom: 96px; }
.eyebrow { font-size: 13px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--gold); font-weight: 600; margin: 0 0 18px; }
h1, h2, h3 { font-family: var(--display); font-weight: 700; letter-spacing: -0.02em; text-wrap: balance; margin: 0; }
h1 { font-size: clamp(40px, 6.2vw, 68px); line-height: 1.04; }
h1 em { font-style: normal; background: linear-gradient(120deg, var(--gold-hi), var(--gold) 55%, var(--gold-lo)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { font-size: clamp(17px, 2vw, 20px); color: #D7DED9; margin: 24px 0 34px; max-width: 34em; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 20px; }
.btn { display: inline-flex; align-items: center; gap: 10px; border-radius: 999px; padding: 15px 26px; font-weight: 600; font-size: 16px; text-decoration: none; }
.btn-gold { background: linear-gradient(135deg, var(--gold-hi), var(--gold) 55%, var(--gold-lo)); color: #1E1608; box-shadow: 0 10px 30px rgba(226, 183, 106, 0.18); }
.btn-gold:hover { filter: brightness(1.05); }
.langs { margin: 26px 0 0; font-size: 14px; color: var(--muted); }

.stage { position: relative; display: grid; place-items: center; min-height: 560px; }
.orbit { position: absolute; width: 140%; max-width: 640px; aspect-ratio: 1; inset: auto; pointer-events: none; }
.phone {
  position: relative; width: min(300px, 74vw); aspect-ratio: 9 / 20; border-radius: 44px; padding: 10px;
  background: linear-gradient(160deg, #23352F, #0B1513); box-shadow: 0 40px 80px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(255, 255, 255, 0.06) inset;
  transform: rotate(-3deg);
}
.phone img { width: 100%; height: 100%; object-fit: cover; border-radius: 35px; }
.chip {
  position: absolute; display: flex; align-items: center; gap: 10px; max-width: 250px; padding: 12px 16px; border-radius: 16px;
  background: rgba(16, 50, 44, 0.86); border: 1px solid var(--line-strong); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  font-size: 14px; line-height: 1.4; box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3);
}
.chip b { color: var(--gold-hi); font-weight: 600; }
.chip { max-width: 220px; }
.chip.one { top: 7%; left: -10%; }
.chip.two { top: 46%; right: -12%; }
@media (max-width: 900px) {
  .hero .wrap { grid-template-columns: minmax(0, 1fr); padding-top: 56px; gap: 40px; }
  .stage { min-height: 0; padding: 20px 0 10px; }
  .chip { display: none; }
}

/* Lời hứa */
.promises { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--night-2); }
.promises ul { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.promises li { padding: 30px 26px; border-left: 1px solid var(--line); display: flex; flex-direction: column; gap: 8px; }
.promises li:first-child { border-left: 0; padding-left: 0; }
.promises h3 { font-size: 17px; letter-spacing: -0.01em; }
.promises p { margin: 0; font-size: 15px; color: var(--muted); }
.promises svg { width: 26px; height: 26px; color: var(--gold); }
@media (max-width: 900px) {
  .promises ul { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .promises li { padding: 24px 18px; } .promises li:nth-child(odd) { border-left: 0; padding-left: 0; }
  .promises li:nth-child(n+3) { border-top: 1px solid var(--line); }
}
@media (max-width: 520px) {
  .promises ul { grid-template-columns: minmax(0, 1fr); }
  .promises li { border-left: 0; padding-left: 0; } .promises li + li { border-top: 1px solid var(--line); }
}

/* Mục chung */
section.block { padding: 104px 0; }
.kicker { font-size: 13px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--gold); font-weight: 600; margin: 0 0 14px; }
h2 { font-size: clamp(30px, 4.2vw, 46px); line-height: 1.1; max-width: 18em; }
.sub { color: var(--muted); font-size: 18px; margin: 18px 0 0; max-width: 36em; }

.steps { list-style: none; counter-reset: step; margin: 56px 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.steps li { counter-increment: step; position: relative; padding: 30px 26px 28px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); }
.steps li::before { content: counter(step); display: grid; place-items: center; width: 38px; height: 38px; border-radius: 50%; border: 1px solid var(--line-strong); color: var(--gold-hi); font: 600 15px/1 var(--display); margin-bottom: 22px; }
.steps h3 { font-size: 20px; margin-bottom: 10px; }
.steps p { margin: 0; color: var(--muted); font-size: 16px; }
.note { margin: 26px 0 0; font-size: 15px; color: var(--muted); }
.note b { color: var(--text); font-weight: 600; }
@media (max-width: 900px) { .steps { grid-template-columns: minmax(0, 1fr); } }

.meet { background: linear-gradient(180deg, var(--night) 0%, var(--night-2) 100%); }
.meet .wrap { display: grid; grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr); gap: 64px; align-items: center; }
.portrait { position: relative; border-radius: 28px; overflow: hidden; border: 1px solid var(--line-strong); box-shadow: 0 30px 70px rgba(0, 0, 0, 0.4); }
.portrait img { width: 100%; height: auto; aspect-ratio: 4 / 5; object-fit: cover; }
.portrait figcaption { position: absolute; left: 14px; bottom: 14px; font-size: 12px; letter-spacing: 0.06em; color: #E9E2D0; background: rgba(7, 31, 27, 0.7); padding: 6px 10px; border-radius: 999px; }
.facts { list-style: none; padding: 0; margin: 30px 0 0; display: grid; gap: 14px; }
.facts li { position: relative; padding-left: 24px; color: #D7DED9; }
.facts li::before { content: ""; position: absolute; left: 0; top: 0.62em; width: 8px; height: 8px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 0 4px rgba(226, 183, 106, 0.14); }
@media (max-width: 900px) { .meet .wrap { grid-template-columns: minmax(0, 1fr); gap: 40px; } .portrait { max-width: 420px; } }

.topics { display: flex; flex-wrap: wrap; gap: 10px; margin: 34px 0 0; padding: 0; list-style: none; }
.topics li { border: 1px solid var(--line-strong); border-radius: 999px; padding: 9px 16px; font-size: 15px; color: #DCE3DF; }

.faq details, .faq h2 { max-width: 820px; }
.faq details { border-bottom: 1px solid var(--line); padding: 4px 0; }
.faq details:first-of-type { border-top: 1px solid var(--line); margin-top: 44px; }
.faq summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 20px 0; font: 600 18px/1.4 var(--display); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; flex: none; width: 30px; height: 30px; display: grid; place-items: center; border: 1px solid var(--line-strong); border-radius: 50%; color: var(--gold-hi); font: 400 18px/1 var(--font); }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 0 0 22px; color: var(--muted); max-width: 40em; }

.closing { text-align: center; padding: 110px 0 120px; position: relative; overflow: hidden; }
.closing::before { content: ""; position: absolute; inset: 0; background: radial-gradient(40% 60% at 50% 40%, rgba(29, 115, 100, 0.45), transparent 70%); pointer-events: none; }
.closing .wrap { position: relative; display: flex; flex-direction: column; align-items: center; gap: 22px; }
.closing img { width: 104px; height: 104px; }
.closing h2 { max-width: 14em; }
.closing p { margin: 0; color: var(--muted); }

footer.foot { border-top: 1px solid var(--line); padding: 44px 0 56px; font-size: 14px; color: var(--muted); }
footer.foot .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 24px 40px; }
footer.foot nav { display: flex; flex-wrap: wrap; gap: 10px 24px; }
footer.foot nav a { color: var(--text); text-decoration: none; }
footer.foot nav a:hover { color: var(--gold-hi); }
footer.foot p { margin: 0; max-width: 38em; }

/* Trang pháp lý: đầu trang tối, thân như tờ giấy cho dễ đọc */
.doc-head { padding: 64px 0 40px; border-bottom: 1px solid var(--line); }
.doc-head h1 { font-size: clamp(34px, 5vw, 48px); }
.doc-head p { margin: 14px 0 0; color: var(--muted); }
.paper { background: var(--paper); color: var(--paper-ink); }
.paper .wrap { max-width: 800px; padding-top: 56px; padding-bottom: 80px; }
.paper h2 { font-size: 24px; margin: 40px 0 12px; color: var(--paper-ink); }
.paper p, .paper li { color: #2B3D38; }
.paper ul, .paper ol { padding-left: 22px; }
.paper li { margin: 6px 0; }
.paper a { color: #0F6153; }
.paper .card { background: #FFFDF8; border: 1px solid var(--paper-line); border-radius: 16px; padding: 18px 22px; margin: 24px 0; }
.paper .card p { margin: 8px 0; }
.paper strong { color: var(--paper-ink); }

.lost { min-height: 70vh; display: grid; place-items: center; text-align: center; }
.lost .wrap { display: flex; flex-direction: column; align-items: center; gap: 18px; }