/* Trang gioi thieu cong khai (Cloudflare Pages). Mau lay tu src/app/globals.css de dong bo voi app. */
@font-face {
  font-family: "Be Vietnam Pro";
  src: url("/fonts/BeVietnamPro-Regular.ttf") format("truetype");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "Be Vietnam Pro";
  src: url("/fonts/BeVietnamPro-SemiBold.ttf") format("truetype");
  font-weight: 600;
  font-display: swap;
}

:root {
  --paper: #fbecf0;
  --paper-warm: #f6dbe3;
  --surface: #fffaf8;
  --line: #f2d9e0;
  --peach: #f4b29c;
  --peach-soft: #fbdfd4;
  --clay: #a24a61;
  --mint: #d6ebe0;
  --mint-deep: #35705b;
  --ink: #4b3a40;
  --ink-soft: #76626c;
  --display: "Playfair Display", Georgia, "Times New Roman", serif;
  --body: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--clay); }
a:focus-visible, .button:focus-visible { outline: 2px solid var(--clay); outline-offset: 3px; }

.wrap { max-width: 960px; margin: 0 auto; padding: 0 16px; }

header.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 20px 0; }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--display); font-weight: 600; font-size: 1.25rem; color: var(--ink); text-decoration: none; }
.brand img { width: 36px; height: 36px; border-radius: 9px; }

h1, h2, h3 { font-family: var(--display); font-weight: 600; line-height: 1.2; margin: 0 0 12px; }
h1 { font-size: clamp(2rem, 6vw, 3.2rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 12px; }

.hero { padding: 48px 0 56px; }
.hero p.lead { font-size: 1.2rem; color: var(--ink-soft); max-width: 640px; }
.badge { display: inline-block; padding: 4px 12px; border-radius: 999px; background: var(--mint); color: var(--mint-deep); font-size: 0.85rem; font-weight: 600; margin-bottom: 16px; }

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.button { display: inline-flex; align-items: center; min-height: 44px; padding: 0 20px; border-radius: 12px; font-weight: 600; text-decoration: none; }
.button.primary { background: var(--clay); color: var(--surface); }
.button.secondary { background: var(--surface); color: var(--clay); border: 1px solid var(--line); }

section { padding: 40px 0; }
section.alt { background: var(--paper-warm); }
.section-intro { color: var(--ink-soft); max-width: 680px; margin-bottom: 24px; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.grid.two { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 20px; }
.card p { color: var(--ink-soft); margin: 0; }
.tag { display: inline-block; font-size: 0.8rem; font-weight: 600; color: var(--clay); background: var(--peach-soft); border-radius: 999px; padding: 2px 10px; margin-bottom: 10px; }

ul.principles { padding-left: 20px; margin: 0; }
ul.principles li { margin-bottom: 8px; }
.more { margin-top: 16px; }

footer { padding: 32px 0 48px; color: var(--ink-soft); font-size: 0.9rem; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 20px; }

.prose { max-width: 720px; padding-top: 24px; padding-bottom: 48px; }
.prose h2 { margin-top: 32px; font-size: 1.35rem; }
.prose ul { padding-left: 20px; }
.prose .muted { color: var(--ink-soft); }

/* Dieu huong tren cung: an lien ket muc tren dien thoai, giu nut mo app. */
.top-links { display: flex; align-items: center; gap: 20px; }
.top-links a:not(.button) { color: var(--ink-soft); text-decoration: none; font-weight: 600; font-size: 0.95rem; }
.top-links a:not(.button):hover { color: var(--clay); }
@media (max-width: 640px) { .top-links a:not(.button) { display: none; } }

/* Anh chup man hinh app (du lieu demo). */
.shot { margin: 40px 0 0; border-radius: 18px; overflow: hidden; background: var(--surface); border: 1px solid var(--line); box-shadow: 0 24px 60px -24px rgba(75, 58, 64, 0.35); }
.shot-bar { display: flex; gap: 6px; padding: 10px 14px; background: var(--paper-warm); }
.shot-bar span { width: 10px; height: 10px; border-radius: 50%; background: var(--line); }
.shot img, .phones img { display: block; width: 100%; height: auto; }
.caption { margin-top: 12px; font-size: 0.85rem; color: var(--ink-soft); }

.phones { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin: 8px 0 32px; }
.phones figure { margin: 0; text-align: center; }
.phones img { border-radius: 28px; border: 6px solid var(--ink); box-shadow: 0 18px 40px -20px rgba(75, 58, 64, 0.45); }
.phones figcaption { margin-top: 12px; font-size: 0.9rem; font-weight: 600; color: var(--ink-soft); }
@media (max-width: 720px) {
  .phones { grid-template-columns: repeat(3, 70%); overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 8px; }
  .phones figure { scroll-snap-align: center; }
}

/* Roadmap Claude. */
.roadmap { list-style: none; margin: 0; padding: 0; display: grid; gap: 16px; }
.roadmap li { display: grid; grid-template-columns: 110px 1fr; gap: 16px; background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 20px; }
.roadmap .when { align-self: start; justify-self: start; font-size: 0.85rem; font-weight: 600; color: var(--clay); background: var(--peach-soft); border-radius: 999px; padding: 4px 12px; }
.roadmap li:first-child .when { color: var(--mint-deep); background: var(--mint); }
.roadmap p { color: var(--ink-soft); margin: 0; }
@media (max-width: 560px) { .roadmap li { grid-template-columns: 1fr; gap: 8px; } }

/* Nguoi xay dung. */
.founder { display: flex; gap: 24px; align-items: flex-start; background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 24px; max-width: 760px; }
.founder .avatar, .founder img.avatar { flex: none; width: 96px; height: 96px; border-radius: 50%; object-fit: cover; }
.founder div.avatar { display: grid; place-items: center; background: var(--blush); color: var(--clay); font-family: var(--display); font-size: 2rem; font-weight: 600; }
.founder .role { font-family: var(--body); font-weight: 400; color: var(--ink-soft); font-size: 1rem; }
.founder .muted { color: var(--ink-soft); margin-top: -6px; }
.founder .links { display: flex; flex-wrap: wrap; gap: 8px 20px; margin: 0; }
@media (max-width: 560px) { .founder { flex-direction: column; } }

/* Pipeline AI dang chay. */
.eyebrow { display: inline-block; font-size: 0.8rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--mint-deep); margin-bottom: 8px; }
#roadmap .eyebrow { color: var(--clay); }
.pipeline { list-style: none; margin: 0 0 24px; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; counter-reset: none; }
.pipeline li { position: relative; background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 20px; }
.pipeline p { color: var(--ink-soft); margin: 0; }
.pipeline .step { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; background: var(--mint); color: var(--mint-deep); font-weight: 600; margin-bottom: 12px; }
@media (max-width: 860px) { .pipeline { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .pipeline { grid-template-columns: 1fr; } }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.stats div { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 18px 20px; }
.stats strong { display: block; font-family: var(--display); font-size: 2rem; color: var(--clay); line-height: 1.1; }
.stats span { color: var(--ink-soft); font-size: 0.95rem; }
@media (max-width: 720px) { .stats { grid-template-columns: 1fr; } }

/* Built with. */
.stack { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 12px; }
.stack li { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 14px 18px; }
.stack strong { display: block; }
.stack span { color: var(--ink-soft); font-size: 0.95rem; }
.facts { margin-top: 16px; color: var(--ink-soft); font-size: 0.95rem; }