/* ============================================================
   Tool Khop Voice — stylesheet dung chung
   Trang ban hang + trang tai khoan + trang quan tri
   ============================================================ */

:root {
  color-scheme: light;
  /* Nen: xam rat nhat, am hon trang tinh de do moi mat */
  --bg: #fafafa;
  --bg-soft: #f4f4f6;
  --surface: #ffffff;
  --surface-2: #f5f5f7;
  --surface-3: #ededf0;
  --border: #e5e5ea;
  --border-strong: #d4d4dc;

  --text: #16161a;
  --text-dim: #5b5b66;
  --text-faint: #8e8e9a;

  /* Tim indigo lam mau chinh, cam lam mau nhan */
  --brand: #5b5bd6;
  --brand-dark: #4a4ac4;
  --brand-light: #7c7cf0;
  --brand-soft: #eeeefc;
  --accent: #e8590c;
  --accent-soft: #fff0e6;

  --success: #0d8a5f;
  --success-soft: #e4f6ee;
  --warn: #a16207;
  --warn-soft: #fdf6e3;
  --danger: #cc2936;
  --danger-soft: #fdecee;

  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --shadow-xs: 0 1px 2px rgba(16, 16, 32, .05);
  --shadow: 0 1px 3px rgba(16, 16, 32, .06), 0 8px 24px -8px rgba(16, 16, 32, .1);
  --shadow-lg: 0 2px 6px rgba(16, 16, 32, .06), 0 24px 48px -12px rgba(16, 16, 32, .16);
  --shadow-brand: 0 8px 24px -6px rgba(91, 91, 214, .4);

  --mono: ui-monospace, "Cascadia Mono", "SF Mono", Consolas, monospace;
  --ease: cubic-bezier(.22, 1, .36, 1);
}

:root[data-theme="light"] {
  color-scheme: light;
}

/* Dark: theo he thong (khi chua chon) hoac khi user chon data-theme="dark" */
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0c0c10;
  --bg-soft: #111116;
  --surface: #16161c;
  --surface-2: #1d1d25;
  --surface-3: #26262f;
  --border: #2a2a34;
  --border-strong: #3a3a46;

  --text: #ececf1;
  --text-dim: #9d9daa;
  --text-faint: #6e6e7c;

  --brand: #8b8bf5;
  --brand-dark: #7a7aee;
  --brand-light: #a5a5ff;
  --brand-soft: #1c1c30;
  --accent: #ff8a4c;
  --accent-soft: #2a1a10;

  --success: #34c88a;
  --success-soft: #10261d;
  --warn: #d9a441;
  --warn-soft: #2a2216;
  --danger: #f4767f;
  --danger-soft: #2c1519;

  --shadow-xs: 0 1px 2px rgba(0, 0, 0, .4);
  --shadow: 0 1px 3px rgba(0, 0, 0, .5), 0 8px 24px -8px rgba(0, 0, 0, .6);
  --shadow-lg: 0 2px 6px rgba(0, 0, 0, .5), 0 24px 48px -12px rgba(0, 0, 0, .7);
  --shadow-brand: 0 8px 24px -6px rgba(139, 139, 245, .35);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]):not([data-theme="dark"]) {
    color-scheme: dark;
    --bg: #0c0c10;
    --bg-soft: #111116;
    --surface: #16161c;
    --surface-2: #1d1d25;
    --surface-3: #26262f;
    --border: #2a2a34;
    --border-strong: #3a3a46;

    --text: #ececf1;
    --text-dim: #9d9daa;
    --text-faint: #6e6e7c;

    --brand: #8b8bf5;
    --brand-dark: #7a7aee;
    --brand-light: #a5a5ff;
    --brand-soft: #1c1c30;
    --accent: #ff8a4c;
    --accent-soft: #2a1a10;

    --success: #34c88a;
    --success-soft: #10261d;
    --warn: #d9a441;
    --warn-soft: #2a2216;
    --danger: #f4767f;
    --danger-soft: #2c1519;

    --shadow-xs: 0 1px 2px rgba(0, 0, 0, .4);
    --shadow: 0 1px 3px rgba(0, 0, 0, .5), 0 8px 24px -8px rgba(0, 0, 0, .6);
    --shadow-lg: 0 2px 6px rgba(0, 0, 0, .5), 0 24px 48px -12px rgba(0, 0, 0, .7);
    --shadow-brand: 0 8px 24px -6px rgba(139, 139, 245, .35);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 84px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  /* 17px thay vi 16px: chu tieng Viet co dau chong cao, o 16px cac dau thanh
     bi det lai va doc lau moi mat hon chu khong dau cung co. */
  font: 17px/1.68 -apple-system, BlinkMacSystemFont, "Segoe UI Variable Text",
        "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a { color: var(--brand); text-decoration: none; transition: color .15s; }
a:hover { color: var(--brand-dark); }

h1, h2, h3 { letter-spacing: -.022em; line-height: 1.15; }

::selection { background: var(--brand); color: #fff; }

:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; border-radius: 4px; }

.wrap { max-width: 1140px; margin: 0 auto; padding: 0 24px; }
.wrap-narrow { max-width: 720px; margin: 0 auto; padding: 0 24px; }

/* ============================================================
   Icon SVG (xem server/src/views/icons.js)
   ============================================================ */
.ico {
  display: inline-block; vertical-align: -.15em; flex-shrink: 0;
  color: inherit; /* net ve an theo mau chu cua the cha */
}
.btn .ico, .nav .ico { vertical-align: -.2em; }

/* ============================================================
   Thanh tien do cuon trang
   ============================================================ */
.scroll-progress {
  position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 200;
  background: linear-gradient(90deg, var(--brand), var(--accent));
  transform: scaleX(0); transform-origin: 0 50%;
  pointer-events: none;
}

/* ============================================================
   Header
   ============================================================ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s, background .25s;
}
/* Vien duoi chi hien khi da cuon, de dau trang lien mach voi hero */
.site-header.is-stuck {
  border-bottom-color: var(--border);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
}
.site-header .wrap { display: flex; align-items: center; gap: 24px; height: 68px; }

.logo {
  font-weight: 800; font-size: 19px; color: var(--text);
  letter-spacing: -.03em; display: flex; align-items: center; gap: 10px;
}
.logo:hover { color: var(--text); }
/* Ten thuong hieu phai nam trong MOT o flex. De chu tran ra ngoai thi `gap`
   cua .logo se chen vao giua "Khop" va "Voice", tach doi ten ra. */
.logo-text { display: inline-block; color: var(--text); }
/* O nen nhat chu khong phai khoi tim dac: hinh dac mau gradient tren nen nhat
   ro net hon nhieu so voi net trang tren nen dam o co nho. */
.logo-mark {
  width: 34px; height: 34px; border-radius: 10px;
  background: var(--brand-soft); border: 1px solid var(--border);
  display: grid; place-items: center;
  transition: transform .35s var(--ease), border-color .35s, background .35s;
}
.logo:hover .logo-mark {
  transform: scale(1.05);
  border-color: color-mix(in srgb, var(--brand) 40%, transparent);
  background: color-mix(in srgb, var(--brand) 12%, var(--surface));
}
.brand-mark { display: block; }
/* Chi to mau chu "Voice" ben trong ten, khong to ca the boc ngoai */
.logo-text span { color: var(--brand); }

.nav { display: flex; gap: 6px; margin-left: auto; align-items: center; }
.nav a {
  color: var(--text-dim); font-size: 15.5px; font-weight: 520;
  padding: 7px 12px; border-radius: var(--radius-sm); transition: color .15s, background .15s;
}
.nav a:hover { color: var(--text); background: var(--surface-2); }
.nav a.btn { color: #fff; }
.nav a.btn:hover { color: #fff; }

.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; padding: 0; margin: 0;
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--surface); color: var(--text-dim);
  cursor: pointer; flex-shrink: 0;
  transition: background .15s, color .15s, border-color .15s;
}
.theme-toggle:hover {
  color: var(--text); background: var(--surface-2); border-color: var(--border-strong);
}
.theme-toggle .ico { display: block; }
.theme-toggle [data-theme-icon="sun"] { display: none; }
.theme-toggle[data-mode="dark"] [data-theme-icon="sun"] { display: block; }
.theme-toggle[data-mode="dark"] [data-theme-icon="moon"] { display: none; }

.avatar {
  width: 30px; height: 30px; border-radius: 50%; object-fit: cover;
  border: 2px solid var(--border); margin-left: 4px;
}

@media (max-width: 620px) {
  .nav a.nav-hide { display: none; }
  .site-header .wrap { gap: 12px; }
}

/* ============================================================
   Hero
   ============================================================ */
.hero { position: relative; padding: 92px 0 72px; text-align: center; }

/* Luoi ke mo phia sau hero, mo dan o hai ben cho do lo */
.hero-grid-bg {
  position: absolute; inset: -60px -50vw auto; height: 560px; z-index: -2;
  pointer-events: none; opacity: .5;
  background-image:
    linear-gradient(to right, var(--border) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 50% 60% at 50% 30%, #000, transparent 72%);
  mask-image: radial-gradient(ellipse 50% 60% at 50% 30%, #000, transparent 72%);
}

/* Quang sang mo phia sau hero. aria-hidden, thuan trang tri. */
.hero-glow {
  position: absolute; inset: -20% -10% auto; height: 620px;
  pointer-events: none; z-index: -1; overflow: hidden;
}
.hero-glow::before, .hero-glow::after {
  content: ""; position: absolute; border-radius: 50%;
  filter: blur(90px); opacity: .5;
}
.hero-glow::before {
  width: 520px; height: 520px; top: -80px; left: 8%;
  background: radial-gradient(circle, var(--brand-light), transparent 68%);
}
.hero-glow::after {
  width: 440px; height: 440px; top: 20px; right: 6%;
  background: radial-gradient(circle, var(--accent), transparent 68%);
  opacity: .28;
}
@media (prefers-reduced-motion: no-preference) {
  .hero-glow::before { animation: float 14s ease-in-out infinite; }
  .hero-glow::after { animation: float 18s ease-in-out infinite reverse; }
}
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(28px, -22px) scale(1.08); }
}

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  margin-bottom: 26px; padding: 7px 16px 7px 8px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 100px; font-size: 14.5px; font-weight: 550;
  color: var(--text-dim); box-shadow: var(--shadow-xs);
}
.hero-badge b {
  background: var(--brand); color: #fff; border-radius: 100px;
  padding: 3px 10px; font-size: 11.5px; font-weight: 700;
  letter-spacing: .03em; text-transform: uppercase;
}

.hero h1 {
  margin: 0 0 22px; font-size: clamp(34px, 6vw, 62px);
  font-weight: 800; letter-spacing: -.035em; line-height: 1.06;
}
.hero h1 .grad {
  background: linear-gradient(120deg, var(--brand) 10%, var(--accent) 90%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero .lead {
  margin: 0 auto 34px; max-width: 620px;
  font-size: clamp(16px, 2vw, 18.5px); color: var(--text-dim); line-height: 1.65;
}
.hero-cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero-note {
  margin: 20px 0 0; font-size: 14.5px; color: var(--text-faint);
  display: inline-flex; align-items: center; gap: 6px;
}
.hero-note .ico { color: var(--success); }

/* Cac phan tu trong hero hien lan luot ngay khi tai trang, khong doi cuon */
@media (prefers-reduced-motion: no-preference) {
  .hero-badge, .hero h1, .hero .lead, .hero-cta, .hero-note, .pipeline, .trust {
    animation: rise .7s var(--ease) both;
  }
  .hero h1 { animation-delay: .06s; }
  .hero .lead { animation-delay: .12s; }
  .hero-cta { animation-delay: .18s; }
  .hero-note { animation-delay: .24s; }
  .pipeline { animation-delay: .3s; }
  .trust { animation-delay: .36s; }
}
@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: none; }
}

/* ============================================================
   So do quy trinh trong hero
   ============================================================ */
.pipeline {
  display: flex; align-items: center; justify-content: center;
  flex-wrap: wrap; gap: 6px; margin-top: 52px;
}
.pipe-node {
  position: relative; display: flex; flex-direction: column; align-items: center; gap: 7px;
  min-width: 104px; padding: 16px 14px 14px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow-xs);
}
.pipe-ico {
  width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center;
  background: linear-gradient(140deg, var(--brand-soft), var(--surface-2));
  border: 1px solid var(--border); color: var(--brand);
}
.pipe-label { font-size: 13px; font-weight: 600; color: var(--text-dim); }

.pipe-node.is-out {
  border-color: transparent;
  background:
    linear-gradient(var(--surface), var(--surface)) padding-box,
    linear-gradient(140deg, var(--brand), var(--accent)) border-box;
  border: 1.5px solid transparent;
}
.pipe-node.is-out .pipe-ico {
  background: linear-gradient(140deg, var(--brand), var(--accent));
  border-color: transparent; color: #fff;
}
.pipe-node.is-out .pipe-label { color: var(--text); font-weight: 680; }

/* Duong noi co cham sang chay tu trai sang phai */
.pipe-link {
  position: relative; width: 34px; height: 2px; border-radius: 2px;
  background: var(--border-strong); overflow: hidden;
}
.pipe-link.is-long { width: 52px; }
.pipe-link i {
  position: absolute; inset: 0; width: 40%;
  background: linear-gradient(90deg, transparent, var(--brand), transparent);
}
@media (prefers-reduced-motion: no-preference) {
  .pipe-link i { animation: flow 1.9s linear infinite; }
  .pipe-link:nth-of-type(4) i { animation-delay: .35s; }
  .pipe-link:nth-of-type(6) i { animation-delay: .7s; }
}
@keyframes flow {
  from { transform: translateX(-100%); }
  to { transform: translateX(280%); }
}

/* Song am thanh nhay trong o "Giong doc" */
.pipe-wave { display: flex; align-items: flex-end; gap: 2px; height: 14px; }
.pipe-wave b {
  width: 2.5px; height: 30%; border-radius: 2px; background: var(--brand); opacity: .75;
}
@media (prefers-reduced-motion: no-preference) {
  .pipe-wave b {
    animation: bounce 1s ease-in-out infinite;
    animation-delay: calc(var(--i) * .08s);
  }
}
@keyframes bounce {
  0%, 100% { height: 25%; }
  50% { height: 100%; }
}

@media (max-width: 700px) {
  .pipe-link { width: 20px; }
  .pipe-link.is-long { width: 20px; }
  .pipe-node { min-width: 84px; padding: 12px 10px; }
}

/* Dai so lieu duoi hero */
.trust {
  display: flex; justify-content: center; flex-wrap: wrap;
  gap: 8px 48px; margin-top: 56px;
  padding-top: 34px; border-top: 1px solid var(--border);
}
.trust-item { text-align: center; }
.trust-item .n {
  font-size: 26px; font-weight: 800; letter-spacing: -.03em;
  background: linear-gradient(120deg, var(--brand), var(--accent));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.trust-item .l { font-size: 14px; color: var(--text-dim); }

/* ============================================================
   Dai chay ngang cac dinh dang ho tro
   ============================================================ */
.marquee {
  position: relative; overflow: hidden; padding: 6px 0 2px;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}
.marquee-track { display: flex; gap: 10px; width: max-content; }
@media (prefers-reduced-motion: no-preference) {
  /* Danh sach duoc lap dung hai lan nen chay het 50% la khop lai lien mach */
  .marquee-track { animation: slide-left 34s linear infinite; }
  .marquee:hover .marquee-track { animation-play-state: paused; }
}
@keyframes slide-left {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
.marquee .chip {
  padding: 6px 14px; border-radius: 100px; white-space: nowrap;
  background: var(--surface); border: 1px solid var(--border);
  font-size: 13px; font-weight: 600; color: var(--text-dim);
  font-family: var(--mono); letter-spacing: .02em;
}

/* ============================================================
   Tieu de khu
   ============================================================ */
/* 76px x2 = hon 150px trong giua hai khu, nhin ra rat loang va roi rac.
   58px vua du de tach y ma trang van lien mach. */
.section { padding: 58px 0; }
.section + .section { padding-top: 46px; }
.section-tag {
  display: block; text-align: center; margin-bottom: 12px;
  font-size: 13px; font-weight: 700; letter-spacing: .12em;
  text-transform: uppercase; color: var(--brand);
}
.section-title {
  text-align: center; margin: 0 0 12px;
  font-size: clamp(26px, 3.6vw, 38px); font-weight: 780; letter-spacing: -.028em;
}
.section-sub {
  text-align: center; margin: 0 auto 46px; max-width: 560px;
  color: var(--text-dim); font-size: 17px;
}

/* ============================================================
   Hien dan khi cuon toi
   ============================================================ */
.reveal {
  opacity: 0; transform: translateY(22px);
  transition: opacity .65s var(--ease), transform .65s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* Cac the con hien lan luot. Do tre do JS gan vao transition-delay. */
[data-stagger] > * {
  opacity: 0; transform: translateY(16px);
  transition: opacity .55s var(--ease), transform .55s var(--ease);
}
.reveal.is-visible [data-stagger] > * { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal.is-visible { opacity: 1; transform: none; transition: none; }
  [data-stagger] > * { opacity: 1; transform: none; transition: none; }
  .hero-badge, .hero h1, .hero .lead, .hero-cta, .hero-note, .pipeline, .trust { animation: none; }
}

/* ============================================================
   Vet sang chay theo con tro (the co [data-spotlight])
   ============================================================ */
[data-spotlight] { position: relative; isolation: isolate; }
[data-spotlight]::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  border-radius: inherit; opacity: 0; transition: opacity .3s;
  background: radial-gradient(
    260px circle at var(--mx, 50%) var(--my, 50%),
    color-mix(in srgb, var(--brand) 12%, transparent),
    transparent 65%
  );
}
@media (hover: hover) and (pointer: fine) {
  [data-spotlight]:hover::before { opacity: 1; }
}

/* ============================================================
   The tinh nang
   ============================================================ */
.feature-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(252px, 1fr)); gap: 16px;
}
.feature {
  position: relative; overflow: hidden;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px 24px 26px;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s;
}
/* Vach mau chay doc canh tren, lo dan ra khi ro chuot */
.feature::after {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--brand), var(--accent));
  transform: scaleX(0); transform-origin: 0 50%;
  transition: transform .4s var(--ease);
}
.feature:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg); border-color: var(--border-strong);
}
.feature:hover::after { transform: scaleX(1); }

/* Icon to va co mau san, khong doi ro chuot moi len mau — mot luoi the xam
   nhat trong rat te nhat, mau o day la thu giu cho ca khu song dong. */
.feature .icon {
  width: 52px; height: 52px; border-radius: 15px; margin-bottom: 18px;
  display: grid; place-items: center; color: #fff;
  background: linear-gradient(140deg, var(--brand-light), var(--brand));
  box-shadow: 0 6px 16px -6px color-mix(in srgb, var(--brand) 60%, transparent);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.feature:hover .icon {
  transform: translateY(-2px) rotate(-5deg) scale(1.07);
  box-shadow: 0 10px 22px -6px color-mix(in srgb, var(--brand) 70%, transparent);
}
/* Ba the doi mau sang tong cam de ca luoi khong bi mot mau tim */
.feature:nth-child(4n) .icon {
  background: linear-gradient(140deg, #f0883e, var(--accent));
  box-shadow: 0 6px 16px -6px color-mix(in srgb, var(--accent) 55%, transparent);
}
.feature:nth-child(4n):hover .icon {
  box-shadow: 0 10px 22px -6px color-mix(in srgb, var(--accent) 65%, transparent);
}

.feature h3 { margin: 0 0 8px; font-size: 17.5px; font-weight: 680; letter-spacing: -.015em; }
.feature p { margin: 0; font-size: 15.5px; color: var(--text-dim); line-height: 1.6; }

/* ============================================================
   Hinh minh hoa (SVG inline, xem src/views/illustrations.js)
   ============================================================ */
.showcase { margin: 0 auto; max-width: 940px; }
.showcase-frame {
  position: relative; border-radius: var(--radius-xl); padding: 22px;
  background: linear-gradient(160deg,
    color-mix(in srgb, var(--brand) 9%, var(--surface)),
    var(--surface) 55%,
    color-mix(in srgb, var(--accent) 7%, var(--surface)));
  border: 1px solid var(--border); box-shadow: var(--shadow-lg);
}
/* Bien minh hoa da tu co khung cua so thi khong can nen mau nua */
.showcase-frame.is-plain { background: var(--surface); padding: 18px; }
.showcase .illus { width: 100%; height: auto; display: block; }
.showcase figcaption {
  margin-top: 14px; text-align: center;
  font-size: 13px; color: var(--text-faint);
}

/* Cua so minh hoa nghieng nhe roi dung thang khi cuon toi — tao cam giac
   san pham that dang duoc dua ra truoc mat. */
@media (prefers-reduced-motion: no-preference) and (min-width: 780px) {
  .showcase-frame {
    perspective: 1400px;
    transform: rotateX(6deg) scale(.97);
    transform-origin: 50% 0;
    transition: transform 1s var(--ease);
  }
  .reveal.is-visible .showcase-frame { transform: none; }
}

/* ============================================================
   Video demo
   ============================================================ */
.demo-frame {
  position: relative; max-width: 900px; margin: 0 auto;
  background: #000; border: 1px solid var(--border);
  border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-lg); line-height: 0;
}
/* Vien sang mo bao quanh khung video */
.demo-frame::after {
  content: ""; position: absolute; inset: -1px; border-radius: inherit;
  padding: 1px; pointer-events: none;
  background: linear-gradient(140deg, var(--brand-light), transparent 45%, var(--accent));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: .55;
}
.demo-frame video { width: 100%; height: auto; display: block; }
/* YouTube/Drive tra ve iframe khong tu bao chieu cao, phai ep ti le 16:9 */
.demo-frame.is-embed { aspect-ratio: 16 / 9; }
.demo-frame.is-embed iframe { width: 100%; height: 100%; display: block; border: 0; }

/* ============================================================
   So sanh truoc / sau
   ============================================================ */
.compare {
  position: relative; max-width: 900px; margin: 0 auto;
  border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--border); box-shadow: var(--shadow-lg);
  line-height: 0; user-select: none;
}
.compare img { width: 100%; height: auto; display: block; }
.compare-before-wrap {
  position: absolute; inset: 0; width: 50%;
  overflow: hidden; /* cat anh goc theo vi tri thanh truot */
}
/* Anh trong khung bi cat phai giu nguyen be ngang cua khung ngoai,
   khong thi keo thanh truot se lam anh co lai thay vi lo dan ra */
.compare-before-wrap .compare-before {
  width: auto; height: 100%; max-width: none;
  position: absolute; top: 0; left: 0;
}
.compare-handle {
  position: absolute; top: 0; bottom: 0; left: 50%;
  width: 3px; background: #fff; transform: translateX(-50%);
  pointer-events: none; box-shadow: 0 0 12px rgba(0, 0, 0, .55);
}
.compare-handle span {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  background: #fff; color: #111; border-radius: 100px;
  padding: 8px 14px; font-size: 12px; font-weight: 700;
  white-space: nowrap; box-shadow: 0 4px 14px rgba(0, 0, 0, .35);
}
.compare-label {
  position: absolute; top: 16px; z-index: 2;
  background: rgba(0, 0, 0, .66); color: #fff;
  padding: 5px 13px; border-radius: 100px;
  font-size: 12px; font-weight: 600; line-height: 1.5;
  backdrop-filter: blur(6px);
}
.compare-label-left { left: 16px; }
.compare-label-right { right: 16px; }
/* Thanh truot that: trong suot, phu kin anh de keo o dau cung duoc */
.compare-range {
  position: absolute; inset: 0; width: 100%; height: 100%;
  margin: 0; padding: 0; opacity: 0; cursor: ew-resize; z-index: 3;
}
.compare-range:focus-visible { opacity: 1; outline: 3px solid var(--brand); }

/* ============================================================
   Bon buoc
   ============================================================ */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; }
.step {
  position: relative; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 20px; text-align: center;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.step:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.step-media {
  aspect-ratio: 16 / 10; margin-bottom: 16px; overflow: hidden;
  background: linear-gradient(140deg, var(--brand-soft), var(--surface-2));
  border-radius: var(--radius); display: flex; align-items: center; justify-content: center;
}
.step-media img {
  width: 100%; height: 100%; object-fit: cover; display: block;
  transition: transform .5s var(--ease);
}
.step:hover .step-media img { transform: scale(1.05); }
.step-glyph { color: var(--brand); opacity: .7; transition: transform .4s var(--ease), opacity .3s; }
.step:hover .step-glyph { transform: scale(1.1); opacity: 1; }

/* So thu tu buoc, dat de len goc the */
.step-index {
  position: absolute; top: -11px; left: -11px; z-index: 2;
  width: 30px; height: 30px; border-radius: 50%;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--brand), var(--brand-dark));
  color: #fff; font-size: 15px; font-weight: 750;
  box-shadow: var(--shadow-brand);
}
.step h3 { margin: 0 0 7px; font-size: 15.5px; font-weight: 660; }
.step p { margin: 0; font-size: 15px; color: var(--text-dim); line-height: 1.6; }

/* ============================================================
   Dung tay va dung bang tool
   ============================================================ */
.versus {
  display: grid; grid-template-columns: 1fr auto 1fr;
  gap: 18px; align-items: stretch;
}
@media (max-width: 860px) {
  .versus { grid-template-columns: 1fr; }
  .versus-vs { justify-self: center; }
}
.versus-col {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 26px 24px;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.versus-col.is-good {
  border-color: transparent;
  background:
    linear-gradient(var(--surface), var(--surface)) padding-box,
    linear-gradient(150deg, var(--brand), var(--accent)) border-box;
  border: 1.5px solid transparent; box-shadow: var(--shadow);
}
.versus-col:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.versus-head { display: flex; align-items: center; gap: 13px; margin-bottom: 18px; }
.versus-head h3 { margin: 0; font-size: 17.5px; font-weight: 680; }
.versus-head p { margin: 2px 0 0; font-size: 14px; color: var(--text-faint); }
.versus-ico {
  width: 36px; height: 36px; border-radius: 11px; display: grid; place-items: center; flex-shrink: 0;
}
.versus-ico.is-bad { background: var(--danger-soft); color: var(--danger); }
.versus-ico.is-good { background: var(--success-soft); color: var(--success); }

.versus-list { list-style: none; margin: 0; padding: 0; }
.versus-list li {
  position: relative; padding: 9px 0 9px 26px;
  font-size: 15.5px; color: var(--text-dim); line-height: 1.55;
  border-bottom: 1px solid var(--border);
}
.versus-list li:last-child { border-bottom: none; }
.versus-list li::before {
  position: absolute; left: 0; top: 9px; font-weight: 800; font-size: 14px;
}
.versus-list.is-bad li::before { content: "✕"; color: var(--danger); }
.versus-list.is-good li::before { content: "✓"; color: var(--success); }

.versus-vs {
  align-self: center; width: 46px; height: 46px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--surface-2); border: 1px solid var(--border);
  font-size: 14px; font-weight: 750; color: var(--text-faint);
  text-transform: uppercase; letter-spacing: .06em;
}

/* ============================================================
   Ai nen dung
   ============================================================ */
.persona-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 18px;
}
.persona {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 24px 22px;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s;
}
.persona:hover {
  transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--border-strong);
}
.persona-ico {
  width: 40px; height: 40px; border-radius: 12px; margin-bottom: 14px;
  display: grid; place-items: center; color: #fff;
  background: linear-gradient(140deg, var(--brand-light), var(--brand));
  box-shadow: var(--shadow-brand);
}
.persona h3 { margin: 0 0 7px; font-size: 15.5px; font-weight: 660; }
.persona p { margin: 0; font-size: 15px; color: var(--text-dim); line-height: 1.6; }

/* ============================================================
   Bang thong so
   ============================================================ */
/* 3 cot: dang co 9 muc nen chia het 3 hang, khong de muc cuoi tro troi mot minh.
   Them/bot muc thi nho giu tong so chia het cho 3. */
.spec-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(330px, 1fr)); gap: 12px;
}
.spec {
  display: flex; align-items: flex-start; gap: 13px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px 18px;
  transition: border-color .25s, transform .25s var(--ease);
}
.spec:hover { border-color: var(--brand); transform: translateX(3px); }
.spec-ico {
  width: 32px; height: 32px; border-radius: 9px; flex-shrink: 0;
  display: grid; place-items: center;
  background: var(--brand-soft); color: var(--brand);
}
.spec-k { font-size: 12px; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; color: var(--text-faint); }
.spec-v { font-size: 15px; color: var(--text); margin-top: 3px; line-height: 1.5; }

/* ============================================================
   Bang gia
   ============================================================ */
.plans {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(258px, 1fr));
  gap: 20px; align-items: stretch;
}
.plan {
  position: relative; display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 30px 26px;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s;
}
.plan:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.plan.popular {
  border-color: transparent; box-shadow: var(--shadow-lg);
  background:
    linear-gradient(var(--surface), var(--surface)) padding-box,
    linear-gradient(140deg, var(--brand), var(--accent)) border-box;
  border: 1.5px solid transparent;
}
.plan .ribbon {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: linear-gradient(120deg, var(--brand), var(--accent)); color: #fff;
  font-size: 11px; font-weight: 700; letter-spacing: .07em; text-transform: uppercase;
  padding: 5px 14px; border-radius: 100px; white-space: nowrap;
  box-shadow: var(--shadow-brand);
}
.plan h3 { margin: 0 0 5px; font-size: 20px; font-weight: 700; }
.plan .tagline { margin: 0 0 22px; font-size: 14.5px; color: var(--text-dim); min-height: 40px; }
.plan .price { font-size: 38px; font-weight: 830; letter-spacing: -.035em; line-height: 1.1; }
.plan .price-original {
  font-size: 16px; font-weight: 500; color: var(--text-faint);
  text-decoration: line-through; margin-left: 9px; letter-spacing: 0;
}
.plan .duration { font-size: 14.5px; color: var(--text-dim); margin: 7px 0 24px; }
.plan ul { list-style: none; margin: 0 0 26px; padding: 0; flex: 1; }
.plan li {
  display: flex; align-items: flex-start; gap: 9px;
  padding: 7px 0; font-size: 15.5px; color: var(--text-dim); line-height: 1.5;
}
.plan li .tick { color: var(--success); margin-top: 3px; }
.plan li.off { color: var(--text-faint); }
.plan li.off .tick { color: var(--text-faint); }
.plan-note { margin: 10px 0 0; font-size: 12px; color: var(--text-faint); text-align: center; }

/* ============================================================
   Hoi dap
   ============================================================ */
.faq { max-width: 740px; margin: 0 auto; }
.faq details {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); margin-bottom: 10px; overflow: hidden;
  transition: border-color .2s, box-shadow .2s;
}
.faq details[open] { border-color: var(--border-strong); box-shadow: var(--shadow-xs); }
.faq summary {
  padding: 17px 20px; cursor: pointer; font-weight: 600; font-size: 16px;
  list-style: none; display: flex; justify-content: space-between;
  align-items: center; gap: 14px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq-chev {
  flex-shrink: 0; color: var(--text-faint);
  transition: transform .3s var(--ease), color .2s;
}
.faq details[open] .faq-chev { transform: rotate(180deg); color: var(--brand); }
.faq summary:hover { background: var(--surface-2); }
.faq-answer {
  padding: 0 20px 18px; color: var(--text-dim); font-size: 15.5px;
  white-space: pre-line; line-height: 1.68;
}
/* Cau tra loi truot xuong thay vi bat ra dot ngot */
@media (prefers-reduced-motion: no-preference) {
  .faq details[open] .faq-answer { animation: fade-down .32s var(--ease); }
}
@keyframes fade-down {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

/* ============================================================
   Khu keu goi cuoi trang
   ============================================================ */
.cta-band {
  position: relative; overflow: hidden; text-align: center;
  border-radius: var(--radius-xl); padding: 62px 32px;
  background: linear-gradient(135deg, var(--brand), var(--brand-dark) 55%, var(--accent) 160%);
  color: #fff; box-shadow: var(--shadow-lg);
}
/* Vet sang quet ngang mot lan moi vai giay */
.cta-shine {
  position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(105deg, transparent 38%, rgba(255, 255, 255, .18) 50%, transparent 62%);
}
@media (prefers-reduced-motion: no-preference) {
  .cta-shine { animation: sweep 5.5s ease-in-out infinite; }
}
@keyframes sweep {
  0%, 62% { transform: translateX(-110%); }
  100% { transform: translateX(110%); }
}
.cta-band h2, .cta-band p, .cta-band .flex { position: relative; z-index: 1; }
.cta-band h2 {
  margin: 0 0 12px; font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 790; color: #fff;
}
.cta-band p {
  margin: 0 auto 28px; max-width: 480px;
  color: rgba(255, 255, 255, .88); font-size: 17px;
}
.cta-band .btn {
  background: #fff; color: var(--brand-dark); border-color: #fff;
}
.cta-band .btn:hover { background: rgba(255, 255, 255, .9); color: var(--brand-dark); }
.cta-band .btn-ghost {
  background: rgba(255, 255, 255, .12); color: #fff;
  border-color: rgba(255, 255, 255, .4);
}
.cta-band .btn-ghost:hover { background: rgba(255, 255, 255, .22); color: #fff; }

/* ============================================================
   Nut
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 20px; border-radius: 10px; border: 1px solid transparent;
  background: var(--brand); color: #fff; font-size: 15.5px; font-weight: 600;
  cursor: pointer; font-family: inherit; white-space: nowrap;
  box-shadow: var(--shadow-xs);
  transition: background .18s, transform .18s var(--ease), box-shadow .18s, opacity .18s;
}
.btn:hover {
  background: var(--brand-dark); color: #fff;
  transform: translateY(-1px); box-shadow: var(--shadow-brand);
}
.btn:active { transform: translateY(0); }
.btn:disabled, .btn[disabled] {
  opacity: .5; cursor: not-allowed; transform: none; box-shadow: none;
  background: var(--surface-3); color: var(--text-faint); border-color: var(--border);
}
.btn-block { width: 100%; }
.btn-lg { padding: 14px 28px; font-size: 15.5px; border-radius: 12px; }
.btn-sm { padding: 7px 13px; font-size: 14.5px; border-radius: 8px; }

.btn-ghost { background: var(--surface); color: var(--text); border-color: var(--border); }
.btn-ghost:hover {
  background: var(--surface-2); color: var(--text);
  border-color: var(--border-strong); box-shadow: var(--shadow-xs);
}
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: var(--danger); opacity: .88; box-shadow: none; }

/* ---------- Trang dang nhap ---------- */
.auth-switch {
  display: grid; grid-template-columns: 1fr 1fr; gap: 4px;
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 11px; padding: 4px; margin-bottom: 20px;
}
.auth-switch button {
  padding: 9px 12px; border: 0; border-radius: 8px; cursor: pointer;
  background: transparent; color: var(--text-dim);
  font: inherit; font-size: 14.5px; font-weight: 620;
  transition: background .18s, color .18s, box-shadow .18s;
}
.auth-switch button:hover { color: var(--text); }
.auth-switch button.is-active {
  background: var(--surface); color: var(--text); box-shadow: var(--shadow-xs);
}

/* Duong ke co chu o giua */
.auth-or {
  position: relative; text-align: center; margin: 20px 0;
  font-size: 12.5px; color: var(--text-faint);
}
.auth-or::before {
  content: ""; position: absolute; top: 50%; left: 0; right: 0;
  height: 1px; background: var(--border);
}
.auth-or span { position: relative; background: var(--surface); padding: 0 12px; }

/* Nut trong nhu mot duong dan */
.linklike {
  background: none; border: 0; padding: 0; cursor: pointer;
  color: var(--brand); font: inherit; font-size: 13.5px;
}
.linklike:hover { text-decoration: underline; }

.btn-google { background: var(--surface); color: var(--text); border-color: var(--border); }
.btn-google:hover { background: var(--surface-2); color: var(--text); box-shadow: var(--shadow); }
.btn-google svg { width: 18px; height: 18px; }

/* ============================================================
   The / bang
   ============================================================ */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 26px; margin-bottom: 20px;
  box-shadow: var(--shadow-xs);
}
.card h2 { margin: 0 0 5px; font-size: 19px; font-weight: 680; }
.card .card-sub { margin: 0 0 20px; font-size: 15px; color: var(--text-dim); }
.card-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 14px; margin-bottom: 18px; flex-wrap: wrap;
}
.card-head h2 { margin: 0; }

.page-title { font-size: 27px; font-weight: 780; letter-spacing: -.03em; margin: 0 0 6px; }

.table-scroll { overflow-x: auto; margin: 0 -26px; padding: 0 26px; }
table.data { width: 100%; border-collapse: collapse; font-size: 15px; min-width: 560px; }
table.data th {
  text-align: left; padding: 10px 13px; color: var(--text-faint);
  font-weight: 650; font-size: 11.5px; text-transform: uppercase; letter-spacing: .06em;
  border-bottom: 1px solid var(--border); white-space: nowrap;
}
table.data td { padding: 13px; border-bottom: 1px solid var(--border); vertical-align: middle; }
table.data tr:last-child td { border-bottom: none; }
table.data tbody tr { transition: background .15s; }
table.data tbody tr:hover td { background: var(--surface-2); }
.num { text-align: right; font-variant-numeric: tabular-nums; }

/* ============================================================
   Nhan trang thai
   ============================================================ */
.badge {
  display: inline-block; padding: 3px 10px; border-radius: 100px;
  font-size: 12px; font-weight: 650; white-space: nowrap; line-height: 1.5;
}
.badge-ok { background: var(--success-soft); color: var(--success); }
.badge-wait { background: var(--warn-soft); color: var(--warn); }
.badge-off { background: var(--danger-soft); color: var(--danger); }
.badge-mute { background: var(--surface-3); color: var(--text-dim); }

/* ============================================================
   Key license
   ============================================================ */
.keybox {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  background: linear-gradient(135deg, var(--brand-soft), var(--surface-2));
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius); padding: 15px 17px;
}
.keybox code {
  font-family: var(--mono); font-size: 17px; font-weight: 700;
  letter-spacing: .08em; color: var(--text); word-break: break-all;
}

/* ============================================================
   Thong ke + bieu do
   ============================================================ */
.stats {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px; margin-bottom: 20px;
}
.stat {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow-xs);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}
.stat:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.stat-head { display: flex; align-items: center; gap: 9px; }
.stat-ico {
  width: 30px; height: 30px; border-radius: 9px; flex-shrink: 0;
  display: grid; place-items: center;
  background: var(--brand-soft); color: var(--brand);
}
.stat-ico.is-money { background: var(--success-soft); color: var(--success); }
.stat-ico.is-warm { background: var(--accent-soft); color: var(--accent); }

.stat .label {
  font-size: 11.5px; color: var(--text-faint); text-transform: uppercase;
  letter-spacing: .07em; font-weight: 680;
}

/* Hang thong ke phu: gon hon hang chinh, de hai hang khong bi nhin nham la
   cung mot loai roi thac mac sao chieu rong lai khac nhau. */
.stats.is-secondary .stat { padding: 15px 18px; }
.stats.is-secondary .stat .value { font-size: 22px; margin-top: 4px; }

/* Thanh ti trong trong bang doanh thu theo goi: nhin phat thay ty le,
   khong phai doc so roi tu so sanh trong dau. */
.share-cell { display: flex; align-items: center; gap: 10px; justify-content: flex-end; }
.share-bar {
  position: relative; height: 7px; border-radius: 4px; width: 96px;
  background: var(--surface-3); overflow: hidden; flex-shrink: 0;
}
.share-bar i {
  position: absolute; inset: 0 auto 0 0; border-radius: 4px;
  background: linear-gradient(90deg, var(--brand), var(--brand-light));
}
.share-cell b { font-variant-numeric: tabular-nums; font-weight: 650; min-width: 38px; text-align: right; }

/* ============================================================
   Thao tac tren tung dong bang quan tri
   ============================================================ */

/* Nut chu dai nhoi vao cot cuoi se tran xuong nhieu dong, moi dong bang cao
   gap ba va cac nut lech nhau. O bang dong nhu the nay dung nut vuong chi co
   icon: chu giai thich nam o tooltip, hang nao cung cao bang nhau. */
.table-actions {
  display: flex; gap: 5px; justify-content: flex-end;
  align-items: center; flex-wrap: nowrap; white-space: nowrap;
}
.table-actions form { display: flex; gap: 5px; align-items: center; }

.btn-icon {
  width: 32px; height: 32px; padding: 0; flex-shrink: 0;
  border-radius: 8px; display: grid; place-items: center;
  background: var(--surface); color: var(--text-dim);
  border: 1px solid var(--border); box-shadow: none;
}
.btn-icon:hover {
  background: var(--surface-2); color: var(--brand);
  border-color: var(--brand); transform: none; box-shadow: var(--shadow-xs);
}
.btn-icon.is-danger:hover { color: var(--danger); border-color: var(--danger); }
.btn-icon.is-good:hover { color: var(--success); border-color: var(--success); }

/* O nhap so ngay gia han, du hep de nam chung mot hang voi cac nut.
   Phai bo nut tang/giam cua trinh duyet: o hep the nay chung chiem gan het
   cho, day con so ra ngoai vung nhin. */
.days-input {
  width: 54px; padding: 7px 6px; font-size: 13px; text-align: center;
  border-radius: 8px; -moz-appearance: textfield; appearance: textfield;
}
.days-input::-webkit-outer-spin-button,
.days-input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }

/* Cot khong duoc phep ngat dong: ma don, license key, ten goi, ngay thang.
   Ngat giua chung lam bang rat kho doc. */
td.keep, th.keep { white-space: nowrap; }
.key-cell {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--mono); font-size: 12.5px; white-space: nowrap;
}

/* ============================================================
   Ban cai (.exe)
   ============================================================ */
.build-current {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 18px 20px; border-radius: var(--radius);
  background: linear-gradient(140deg, var(--brand-soft), var(--surface-2));
  border: 1px solid var(--border);
}
.build-ico {
  width: 46px; height: 46px; border-radius: 13px; flex-shrink: 0;
  display: grid; place-items: center; color: #fff;
  background: linear-gradient(140deg, var(--brand-light), var(--brand));
  box-shadow: var(--shadow-brand);
}
.build-info { min-width: 0; flex: 1; }
.build-name {
  font-weight: 700; font-size: 16px;
  display: flex; align-items: center; gap: 9px; flex-wrap: wrap;
}
.build-meta { font-size: 13.5px; color: var(--text-dim); margin-top: 4px; }
.build-notes { font-size: 14px; margin-top: 8px; }
.build-hash {
  margin-top: 10px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  font-size: 12px;
}
.build-hash code {
  font-family: var(--mono); font-size: 11.5px; color: var(--text-dim);
  word-break: break-all;
}
.stat .value {
  font-size: 28px; font-weight: 800; margin-top: 7px;
  letter-spacing: -.03em; font-variant-numeric: tabular-nums; line-height: 1.15;
}
.stat .delta { font-size: 13px; color: var(--text-dim); margin-top: 5px; }
.stat .delta.up { color: var(--success); font-weight: 600; }
.stat .delta.down { color: var(--danger); font-weight: 600; }

.chart { display: flex; align-items: flex-end; gap: 4px; height: 190px; padding-top: 22px; }
.chart .bar {
  flex: 1; min-height: 3px; position: relative; border-radius: 4px 4px 0 0;
  background: linear-gradient(180deg, var(--brand-light), var(--brand));
  opacity: .85; transition: opacity .15s, transform .15s;
}
.chart .bar:hover { opacity: 1; transform: scaleY(1.03); transform-origin: bottom; }
.chart .bar::after {
  content: attr(data-label); position: absolute; bottom: 100%; left: 50%;
  transform: translateX(-50%); font-size: 11.5px; color: var(--text);
  white-space: nowrap; opacity: 0; transition: opacity .15s; pointer-events: none;
  background: var(--surface); border: 1px solid var(--border); border-radius: 7px;
  padding: 5px 9px; margin-bottom: 6px; z-index: 5; box-shadow: var(--shadow);
}
.chart .bar:hover::after { opacity: 1; }
.chart-axis {
  display: flex; justify-content: space-between;
  font-size: 11.5px; color: var(--text-faint); margin-top: 10px;
}

/* ============================================================
   Form
   ============================================================ */
.form-row { margin-bottom: 18px; }
.form-row label { display: block; font-size: 14.5px; font-weight: 620; margin-bottom: 7px; }
.form-row .hint, .hint { font-size: 13px; color: var(--text-dim); margin-top: 6px; line-height: 1.55; }

/* Liet ke theo type de KHONG dinh vao input[type=file] va cac o tick.
   Nho them type moi vao day: thieu mot type la o do roi ve kieu mac dinh cua
   trinh duyet, nam lot thom giua nhung o da bo goc (o dien thoai tung bi vay). */
input[type=text], input[type=number], input[type=email], input[type=url],
input[type=password], input[type=tel], input[type=search], input[type=date],
select, textarea {
  width: 100%; padding: 11px 14px; border: 1px solid var(--border);
  border-radius: 10px; background: var(--surface); color: var(--text);
  font: inherit; font-size: 15.5px; transition: border-color .15s, box-shadow .15s;
}
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--brand);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand) 18%, transparent);
}
input[type=file] {
  width: 100%; font-size: 14.5px; color: var(--text-dim);
  padding: 10px; border: 1px dashed var(--border-strong);
  border-radius: 10px; background: var(--surface-2); cursor: pointer;
}
input[type=file]:hover { border-color: var(--brand); }
textarea { min-height: 88px; resize: vertical; line-height: 1.6; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 18px; }
.check { display: flex; align-items: center; gap: 9px; font-size: 15.5px; margin-bottom: 10px; cursor: pointer; }
.check input { width: 17px; height: 17px; accent-color: var(--brand); cursor: pointer; }

/* Chon nguon video (trang quan tri) */
.source-picker { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 11px; }
.source-option {
  display: block; cursor: pointer; padding: 15px 17px; position: relative;
  border: 1.5px solid var(--border); border-radius: var(--radius);
  background: var(--surface); transition: border-color .18s, background .18s, transform .18s;
}
.source-option:hover { background: var(--surface-2); transform: translateY(-2px); }
.source-option.is-active { border-color: var(--brand); background: var(--brand-soft); }
.source-option input { position: absolute; opacity: 0; pointer-events: none; }
.source-name { display: block; font-weight: 660; font-size: 15.5px; margin-bottom: 4px; }
.source-desc { display: block; font-size: 13px; color: var(--text-dim); line-height: 1.5; }
.source-panel { margin-top: 18px; }

/* ============================================================
   Thong bao
   ============================================================ */
.alert {
  padding: 14px 17px; border-radius: var(--radius); margin-bottom: 20px;
  font-size: 15.5px; border: 1px solid transparent; line-height: 1.6;
}
.alert-ok { background: var(--success-soft); color: var(--success); border-color: color-mix(in srgb, var(--success) 26%, transparent); }
.alert-err { background: var(--danger-soft); color: var(--danger); border-color: color-mix(in srgb, var(--danger) 26%, transparent); }
.alert-info { background: var(--brand-soft); color: var(--brand); border-color: color-mix(in srgb, var(--brand) 26%, transparent); }

/* ============================================================
   Thanh toan
   ============================================================ */
.pay-grid { display: grid; grid-template-columns: 320px 1fr; gap: 32px; }
@media (max-width: 760px) { .pay-grid { grid-template-columns: 1fr; } }
.qr-box {
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 16px; text-align: center;
  box-shadow: var(--shadow);
}
.qr-box img { width: 100%; max-width: 288px; height: auto; display: block; margin: 0 auto; }
.pay-field {
  display: flex; justify-content: space-between; align-items: center;
  gap: 14px; padding: 13px 0; border-bottom: 1px solid var(--border);
}
.pay-field:last-child { border-bottom: none; }
.pay-field .k { font-size: 15px; color: var(--text-dim); }
.pay-field .v {
  font-weight: 660; font-family: var(--mono); font-size: 15.5px;
  text-align: right; word-break: break-all;
}
.copy {
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 7px;
  cursor: pointer; padding: 4px 10px; font-size: 11.5px; color: var(--text-dim);
  font-family: inherit; font-weight: 550; transition: background .15s, color .15s;
  margin-left: 6px;
}
.copy:hover { background: var(--brand); color: #fff; border-color: var(--brand); }

/* ============================================================
   Tab quan tri
   ============================================================ */
/* Nhan "Quan tri" canh logo, de biet ngay dang o khu lam viec */
.logo-badge {
  margin-left: 4px; padding: 3px 9px; border-radius: 100px;
  background: var(--brand-soft); color: var(--brand);
  font-size: 11.5px; font-weight: 700; letter-spacing: .04em;
  text-transform: uppercase; border: 1px solid color-mix(in srgb, var(--brand) 22%, transparent);
}

.site-footer.is-admin {
  margin-top: 48px; padding: 20px 0; background: transparent;
}
.site-footer.is-admin .wrap {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: 13px; color: var(--text-faint);
}

/* Thanh tab dinh lai khi cuon, de doi trang khong phai cuon nguoc len */
.tabs {
  display: flex; gap: 2px; border-bottom: 1px solid var(--border);
  margin-bottom: 26px; overflow-x: auto; scrollbar-width: thin;
  position: sticky; top: 68px; z-index: 20;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
}
.tabs a {
  padding: 12px 17px; color: var(--text-dim); font-size: 15.5px; font-weight: 570;
  border-bottom: 2px solid transparent; margin-bottom: -1px; white-space: nowrap;
  transition: color .15s, border-color .15s;
}
.tabs a:hover { color: var(--text); }
.tabs a.active { color: var(--brand); border-bottom-color: var(--brand); }

/* ============================================================
   Trang thai rong
   ============================================================ */
.empty { text-align: center; padding: 52px 20px; color: var(--text-dim); }
.empty .icon {
  margin: 0 auto 14px; width: 68px; height: 68px; border-radius: 20px;
  display: grid; place-items: center; color: var(--text-faint);
  background: var(--surface-2); border: 1px solid var(--border);
}
.empty p { margin: 0 0 18px; }
.empty-ico {
  margin: 0 auto 16px; width: 64px; height: 64px; border-radius: 20px;
  display: grid; place-items: center;
  background: var(--warn-soft); color: var(--warn);
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  margin-top: 88px; padding: 44px 0 32px;
  border-top: 1px solid var(--border); background: var(--bg-soft);
}
.footer-top {
  display: flex; justify-content: space-between; align-items: flex-start;
  gap: 32px; flex-wrap: wrap; margin-bottom: 32px;
}
.footer-brand { max-width: 300px; }
.footer-brand p { margin: 12px 0 0; font-size: 14.5px; color: var(--text-dim); line-height: 1.6; }
.footer-links { display: flex; gap: 56px; flex-wrap: wrap; }
.footer-col h4 {
  margin: 0 0 12px; font-size: 12px; font-weight: 700;
  text-transform: uppercase; letter-spacing: .08em; color: var(--text-faint);
}
.footer-col a { display: block; margin-bottom: 9px; font-size: 15px; color: var(--text-dim); }
.footer-col a:hover { color: var(--brand); }
.footer-bottom {
  padding-top: 26px; border-top: 1px solid var(--border);
  color: var(--text-faint); font-size: 14px;
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}
.made-in { display: inline-flex; align-items: center; gap: 7px; }
.made-in .ico { color: var(--danger); }
.footer-col a { display: flex; align-items: center; gap: 7px; }

/* ============================================================
   Tien ich
   ============================================================ */
.muted { color: var(--text-dim); }
.mono { font-family: var(--mono); font-size: 14px; }
.right { text-align: right; }
.nowrap { white-space: nowrap; }
.mt0 { margin-top: 0; } .mb0 { margin-bottom: 0; }
.flex { display: flex; gap: 11px; align-items: center; flex-wrap: wrap; }
.center { text-align: center; }

code.mono {
  background: var(--surface-2); padding: 2px 6px;
  border-radius: 5px; border: 1px solid var(--border); font-size: 13px;
}

/* ============================================================
   Nut lien he noi o goc phai
   ============================================================ */
.contact-dock {
  position: fixed; right: 18px; bottom: 18px; z-index: 60;
  display: flex; flex-direction: column; align-items: flex-end; gap: 10px;
}

/* Dong ghi chu chi hien tren man hinh rong: dien thoai da chat cho roi */
.contact-note {
  background: var(--surface); color: var(--text-dim);
  border: 1px solid var(--border); border-radius: 999px;
  padding: 6px 13px; font-size: 12.5px; white-space: nowrap;
  box-shadow: 0 6px 18px rgba(0, 0, 0, .10);
}

.contact-btn {
  display: inline-flex; align-items: center; gap: 0;
  height: 52px; padding: 0 13px; border-radius: 26px;
  color: #fff; text-decoration: none; font-weight: 620; font-size: 14.5px;
  box-shadow: 0 8px 22px rgba(0, 0, 0, .18);
  transition: transform .16s, box-shadow .16s, gap .16s, padding .16s;
}
.contact-btn:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(0, 0, 0, .24); }
.contact-ico { display: inline-flex; }

/* Nhan chu hien ra khi ro chuot: luc nghi chi la nut tron gon gang, khong
   che mat noi dung trang; luc can thi biet ro bam vao se lam gi. */
.contact-label {
  max-width: 0; overflow: hidden; white-space: nowrap; opacity: 0;
  transition: max-width .22s ease, opacity .18s ease;
}
.contact-btn:hover .contact-label,
.contact-btn:focus-visible .contact-label { max-width: 180px; opacity: 1; }
.contact-btn:hover, .contact-btn:focus-visible { gap: 9px; padding: 0 18px 0 13px; }

.contact-zalo { background: #0068ff; }
.contact-facebook { background: #0866ff; }
.contact-phone { background: #16a34a; }

/* Vong song lan toa quanh nut dau tien, du de gay chu y ma khong nhap nhay */
.contact-btn:first-of-type::after {
  content: ''; position: absolute; inset: 0; border-radius: 26px;
  box-shadow: 0 0 0 0 currentColor; opacity: .45;
  animation: contact-ping 2.6s ease-out infinite;
}
.contact-btn { position: relative; }
@keyframes contact-ping {
  0% { box-shadow: 0 0 0 0 currentColor; opacity: .40; }
  70% { box-shadow: 0 0 0 14px currentColor; opacity: 0; }
  100% { box-shadow: 0 0 0 0 currentColor; opacity: 0; }
}

@media (max-width: 720px) {
  .contact-dock { right: 12px; bottom: 12px; gap: 8px; }
  .contact-note { display: none; }
  .contact-btn { height: 46px; padding: 0 11px; }
  /* Khong co con tro chuot thi khong bao gio ro duoc — de nut tron cho gon */
  .contact-btn:hover .contact-label { max-width: 0; opacity: 0; }
  .contact-btn:hover { gap: 0; padding: 0 11px; }
}

@media (prefers-reduced-motion: reduce) {
  .contact-btn::after { animation: none; }
  .contact-btn, .contact-label { transition: none; }
}