/* ============================================================
   Chích Bông — trang chủ v2 (2026)
   Viết mới hoàn toàn, không kế thừa template cũ.
   Bảng màu lấy từ logo chim robot: navy đen, neon xanh điện, thép bạc.
   ============================================================ */

:root {
  --bg: #050810;
  --surface: rgb(20 27 43 / .45);
  --fg: #d7dde8;
  --fg-muted: #8b95a7;
  --heading: #ffffff;
  --link: #5eb1ff;
  --line: rgb(255 255 255 / .10);

  /* bộ ba r g b, dùng với cú pháp rgb(var(--x) / alpha) */
  --neon: 43 140 255;
  --cyan: 77 214 255;
  --steel: 199 207 219;
  --indigo: 138 164 255;

  --font-mono: "JetBrains Mono", ui-monospace, Menlo, Consolas, "Liberation Mono", monospace;
  --font-sans: "Be Vietnam Pro", system-ui, "Segoe UI", Roboto, Arial, sans-serif;

  --measure: 896px;
  --gap-section: 64px;
  --radius-card: 8px;
  --radius-pill: 9999px;

  /* palette hiệu ứng matrix — hero-matrix.js đọc các biến này, đổi màu chỉ cần sửa ở đây */
  --mx-bg: #050810;
  --mx-dim: #173366;
  --mx-head: #dbeafe;
  --mx-mark-dim: #2b8cff;
  --mx-mark: #cfe6ff;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scrollbar-color: #2a3446 var(--bg);
  background: var(--bg);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 400 16px/26px var(--font-mono);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: var(--link); text-underline-offset: 3px; }
a:hover { color: #fff; }
::selection { background: rgb(var(--neon) / .45); color: #fff; }
:focus-visible { outline: 2px solid rgb(var(--neon)); outline-offset: 3px; border-radius: 4px; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: 16px; top: -60px; z-index: 100;
  padding: 8px 14px; background: #fff; color: #000; border-radius: 6px;
  font: 500 14px var(--font-sans); text-decoration: none;
}
.skip-link:focus { top: 16px; }

/* Banner chỉ hiện khi tắt JavaScript trên màn hình hẹp / cảm ứng */
.noscript-banner {
  display: none; padding: 12px 16px; background: #0d5fd6; color: #fff;
  font: 500 14px/20px var(--font-sans); text-align: center;
}
.noscript-banner a { color: #fff; }
@media (max-width: 900px), (pointer: coarse) { .noscript-banner { display: block; } }

/* ---------- Pill buttons ---------- */
.pills { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; margin: 0; padding: 0; }
.pill {
  --tint: var(--neon);
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 20px; border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  background: rgb(var(--tint) / .2);
  color: #fff; font: 500 16px/1.25 var(--font-sans); text-decoration: none;
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  transition: background-color .2s ease, border-color .2s ease, transform .2s ease;
}
.pill:hover { color: #fff; background: rgb(var(--tint) / .34); border-color: rgb(255 255 255 / .22); transform: translateY(-1px); }
.pill--neon { --tint: var(--neon); }
.pill--cyan { --tint: var(--cyan); }
.pill--steel { --tint: var(--steel); }
.pill--indigo { --tint: var(--indigo); }

/* ---------- Thanh điều hướng cố định (hiện sau khi cuộn qua hero) ---------- */
.topbar {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 14px 24px;
  background: linear-gradient(to bottom, rgb(5 8 16 / .9), rgb(5 8 16 / 0));
  transform: translateY(-100%); opacity: 0; visibility: hidden; pointer-events: none;
  transition: transform .35s ease, opacity .35s ease, visibility 0s linear .35s;
}
.topbar.is-visible {
  transform: none; opacity: 1; visibility: visible; pointer-events: auto;
  transition: transform .35s ease, opacity .35s ease, visibility 0s;
}
.topbar__brand {
  display: inline-flex; align-items: center; gap: 10px;
  color: #fff; text-decoration: none; font: 600 16px var(--font-sans);
}
.topbar__brand img { width: 34px; height: 34px; }

/* ---------- Hero ---------- */
.hero {
  position: relative; isolation: isolate;
  height: max(600px, 100vh);
  overflow: hidden; contain: strict;
  background: var(--mx-bg);
}
.hero__canvas {
  position: absolute; inset: 0; width: 100%; height: 100%; display: block;
  filter: contrast(1.08) saturate(1.1);
}
/* scanline + vignette kiểu màn hình CRT + mờ dần về đúng màu nền ở đỉnh và đáy để nối liền với nội dung */
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background:
    repeating-linear-gradient(to bottom, rgb(0 0 0 / .22) 0 1px, transparent 1px 3px),
    linear-gradient(to bottom, var(--bg) 0%, transparent 9%, transparent 68%, var(--bg) 100%),
    radial-gradient(ellipse 72% 62% at 50% 42%, transparent 40%, rgb(5 8 16 / .8));
}
.hero__copy {
  position: absolute; left: 0; right: 0; top: 66%; z-index: 2;
  display: flex; flex-direction: column; align-items: center; gap: 22px;
  padding: 0 24px; text-align: center;
}
.hero__wordmark {
  display: none; margin: 0;
  font: 700 clamp(32px, 6vw, 56px)/1.1 var(--font-sans);
  letter-spacing: .04em; color: #fff;
  text-shadow: 0 0 30px rgb(var(--neon) / .7);
}
.hero__slogan {
  margin: 0;
  font: 600 clamp(20px, 1.6vw + 12px, 28px)/1.3 var(--font-sans);
  color: #fff;
  text-shadow: 0 0 24px rgb(var(--neon) / .6), 0 2px 12px rgb(0 0 0 / .6);
  opacity: 0; animation: fade-up 1s ease .9s forwards;
}
.hero .pills { opacity: 0; animation: fade-up 1s ease 1.3s forwards; }
@keyframes fade-up { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

/* cửa sổ hẹp: bỏ mặt nạ glyph, hiện tên thương hiệu dạng chữ */
.hero--text-title .hero__wordmark { display: block; }
.hero--text-title .hero__copy { top: 50%; transform: translateY(-50%); }

/* ---------- Nội dung ---------- */
.content { max-width: var(--measure); margin: 0 auto; padding: 56px 24px 40px; }
.sec { margin-top: var(--gap-section); scroll-margin-top: 88px; }
.sec:first-child { margin-top: 0; }
.sec__title {
  display: flex; align-items: center; gap: 12px; margin: 0 0 24px;
  font: 500 clamp(24px, 2vw + 16px, 30px)/1.2 var(--font-mono); color: var(--heading);
}
.sec__icon { width: 22px; height: 22px; flex: none; color: rgb(var(--c)); }
.sec p { margin: 0 0 20px; max-width: 72ch; }
.sec p:last-child { margin-bottom: 0; }
.sec--about { --c: var(--neon); }
.sec--solutions { --c: var(--cyan); }
.sec--apps { --c: var(--steel); }
.sec--contact { --c: var(--indigo); }
.lead { color: var(--fg-muted); }
.quote { color: #fff; }

/* Giải pháp: danh sách đánh số */
.sol { list-style: none; margin: 24px 0 0; padding: 0; }
.sol li {
  display: grid; grid-template-columns: 56px 1fr; column-gap: 16px; row-gap: 6px;
  padding: 20px 0; border-top: 1px solid var(--line);
}
.sol li:last-child { border-bottom: 1px solid var(--line); }
.sol__num { font: 500 14px/26px var(--font-mono); color: rgb(var(--cyan)); letter-spacing: .08em; }
.sol__title { margin: 0; font: 500 16px/26px var(--font-mono); color: #fff; }
.sol__desc { margin: 0; grid-column: 2; color: var(--fg-muted); font-size: 14px; line-height: 22px; }

/* Ứng dụng: lưới thẻ */
.apps { list-style: none; margin: 24px 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.card {
  --tint: var(--neon);
  position: relative; display: flex; flex-direction: column; justify-content: space-between;
  aspect-ratio: 1 / 1; padding: 18px;
  border: 1px solid var(--line); background: var(--surface); border-radius: var(--radius-card);
  color: inherit; text-decoration: none;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.card:hover { color: inherit; transform: translateY(-4px); border-color: rgb(var(--neon) / .45); box-shadow: 0 12px 40px rgb(0 0 0 / .35); }
.card--soon { cursor: default; }
.card--soon:hover { transform: none; border-color: var(--line); box-shadow: none; }
.card--live { --tint: var(--neon); }
.card--spa { --tint: var(--indigo); }
.card--food { --tint: var(--cyan); }
.card__head { display: flex; justify-content: space-between; align-items: flex-start; gap: 8px; }
.card__mono {
  width: 42px; height: 42px; border-radius: 10px; display: grid; place-items: center;
  font: 600 13px var(--font-sans); letter-spacing: .04em; color: #fff;
  background: rgb(var(--tint) / .22); border: 1px solid rgb(var(--tint) / .45);
}
.chip {
  font: 500 11px/1 var(--font-sans); padding: 6px 10px; border-radius: var(--radius-pill);
  border: 1px solid var(--line); color: var(--fg-muted); background: rgb(255 255 255 / .04); white-space: nowrap;
}
.card__title { margin: 0 0 6px; font: 600 17px/1.3 var(--font-sans); color: #fff; }
.card__desc { margin: 0; font-size: 13px; line-height: 20px; color: var(--fg-muted); }

/* Liên hệ */
.contact p { margin: 0 0 14px; }
.contact p:last-child { margin: 0; }

/* ---------- Footer ---------- */
.footer {
  max-width: var(--measure); margin: 0 auto; padding: 48px 24px 56px;
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  font-size: 13px; line-height: 20px; color: var(--fg-muted); text-align: center;
}
.footer__links { display: flex; gap: 28px; flex-wrap: wrap; justify-content: center; margin: 0; padding: 0; list-style: none; }
.footer__links a { color: var(--fg-muted); text-decoration: none; }
.footer__links a:hover { color: #fff; }

/* ---------- Responsive (vẫn cần cho ?desktop=1 và crawler mobile) ---------- */
@media (max-width: 899px) {
  .apps { gap: 16px; }
}
@media (max-width: 639px) {
  :root { --gap-section: 48px; }
  .apps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .topbar__brand span { display: none; }
  .topbar { padding: 12px 16px; }
  .content { padding: 40px 20px 32px; }
}
@media (max-width: 479px) {
  .apps { grid-template-columns: 1fr; }
  .card { aspect-ratio: auto; min-height: 120px; gap: 14px; }
  .sol li { grid-template-columns: 1fr; row-gap: 2px; }
  .sol__desc { grid-column: 1; }
  .hero { height: max(480px, 90vh); }
}

/* ---------- Giảm chuyển động ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero__slogan, .hero .pills { animation: none; opacity: 1; }
  .card, .pill, .topbar { transition: none; }
}