/* =====================================================================
   site.css — component & layout cho trang phát hành.
   Mọi màu/khoảng cách lấy từ tokens.css. Không dùng màu cứng ở đây.
   ===================================================================== */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 76px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition-duration: 1ms !important; animation: none !important; } }
[hidden] { display: none !important; }
body {
  margin: 0;
  background: var(--board);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--fs-md);
  line-height: var(--lh-body);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 30; background: var(--board); }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--teal-ink); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; border-radius: 2px; }
h1, h2, h3 { line-height: var(--lh-tight); text-wrap: balance; margin: 0; letter-spacing: -0.02em; }
h2 { font-size: var(--fs-2xl); font-weight: 700; }
h3 { font-size: var(--fs-lg); font-weight: 600; letter-spacing: -0.01em; }
p { margin: 0; }
.mono { font-family: var(--font-mono); font-size: var(--fs-xs); letter-spacing: 0; font-variant-numeric: tabular-nums; }
/* Nhãn chú thích có chữ Việt: dùng sans (font mono dự phòng hay vỡ dấu) */
.label { font-family: var(--font-sans); font-size: var(--fs-xs); font-weight: 500; letter-spacing: .01em; font-variant-numeric: tabular-nums; color: var(--ink-2); }
.num { font-variant-numeric: tabular-nums; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- Bố cục ---------- */
.wrap {
  width: 100%;
  max-width: calc(var(--container) + 64px);
  margin-inline: auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
@media (min-width: 720px) { .wrap { padding-left: max(32px, env(safe-area-inset-left, 0px)); padding-right: max(32px, env(safe-area-inset-right, 0px)); } }
.section { padding-block: var(--sp-9) 0; }
.section-head { display: grid; gap: var(--sp-3); max-width: 720px; margin-bottom: var(--sp-7); }
.section-head > p:not(.eyebrow) { color: var(--ink-2); font-size: var(--fs-lg); line-height: 1.5; }
.eyebrow {
  font-family: var(--font-sans); font-size: var(--fs-xs); font-weight: 700;
  text-transform: uppercase; letter-spacing: .1em; color: var(--teal-ink);
  display: flex; align-items: center; gap: var(--sp-2);
}
.eyebrow::before { content: ""; width: 18px; height: 0; border-top: var(--dash); }

/* ---------- Thanh trên ---------- */
.topbar {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20;
  background: color-mix(in srgb, var(--board) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid color-mix(in srgb, var(--rule) 70%, transparent);
}
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-4); min-height: 60px; }
.brand { display: flex; align-items: center; gap: var(--sp-2); color: var(--ink); text-decoration: none; font-weight: 700; font-size: var(--fs-sm); white-space: nowrap; }
.brand img { width: 26px; height: 26px; }
.brand .mono { color: var(--ink-2); font-weight: 400; }
@media (max-width: 479px) { .brand .mono { display: none; } }
.topbar .btn { white-space: nowrap; }
.nav { display: none; gap: var(--sp-5); }
.nav a { color: var(--ink-2); text-decoration: none; font-size: var(--fs-sm); font-weight: 500; }
.nav a:hover { color: var(--ink); }
@media (min-width: 900px) { .nav { display: flex; } }

/* ---------- Nút ---------- */
.btn {
  --btn-bg: var(--paper); --btn-fg: var(--ink); --btn-bd: var(--rule);
  display: inline-flex; align-items: center; justify-content: center; gap: var(--sp-2);
  min-height: 48px; padding: 0 var(--sp-5);
  border: 1px solid var(--btn-bd); border-radius: var(--radius-s);
  background: var(--btn-bg); color: var(--btn-fg);
  font: 600 var(--fs-md)/1 var(--font-sans); text-decoration: none; cursor: pointer;
  transition: transform var(--dur-1) var(--ease), background var(--dur-2) var(--ease), box-shadow var(--dur-2) var(--ease);
}
.btn:hover { text-decoration: none; box-shadow: 0 2px 0 var(--btn-bd); transform: translateY(-1px); }
.btn:active { transform: translateY(0); box-shadow: none; }
.btn-primary { --btn-bg: var(--teal); --btn-fg: var(--on-teal); --btn-bd: var(--teal); }
.btn-primary:hover { --btn-bg: color-mix(in srgb, var(--teal) 88%, var(--ink)); box-shadow: 0 3px 0 color-mix(in srgb, var(--teal) 60%, var(--ink)); }
.btn-ghost { --btn-bg: transparent; }
.btn-sm { min-height: 38px; padding: 0 var(--sp-4); font-size: var(--fs-sm); }
.btn[disabled], .btn[aria-busy="true"] { opacity: .7; cursor: progress; transform: none; box-shadow: none; }
.btn .spinner { width: 16px; height: 16px; border-radius: 50%; border: 2px solid currentColor; border-right-color: transparent; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Hero ---------- */
.hero { padding-block: var(--sp-8) 0; }
.hero .wrap { display: grid; gap: var(--sp-8); align-items: center; }
@media (min-width: 980px) { .hero .wrap { grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: var(--sp-8); } }
.hero-copy { display: grid; gap: var(--sp-5); min-width: 0; }
.hero h1 { font-size: var(--fs-3xl); font-weight: 700; letter-spacing: -0.035em; }
.bbox {
  position: relative; display: inline-block; color: var(--teal-ink);
  outline: var(--dash); outline-offset: 2px; border-radius: 1px; padding: 0 .06em; line-height: 1.02;
}
.bbox-tag {
  position: relative; top: -0.9em; margin-left: .35em;
  font-family: var(--font-mono); font-size: var(--fs-xs); font-weight: 500; letter-spacing: 0;
  color: var(--teal-ink); white-space: nowrap; vertical-align: baseline;
}
.lead { font-size: var(--fs-lg); line-height: 1.55; color: var(--ink-2); max-width: 36em; }
.cta-row { display: flex; flex-wrap: wrap; gap: var(--sp-3); }
.meta-row { display: flex; flex-wrap: wrap; gap: var(--sp-2) var(--sp-4); color: var(--ink-2); font-size: var(--fs-sm); }
.meta-row span { display: inline-flex; align-items: center; gap: 6px; }
.meta-row span::before { content: ""; width: 6px; height: 6px; background: var(--teal); border-radius: 1px; }

/* ---------- Khung trang mẫu (proof) ---------- */
.proof { margin: 0; display: grid; gap: var(--sp-4); min-width: 0; }
.proof-bar { display: flex; justify-content: space-between; gap: var(--sp-3); color: var(--ink-2); flex-wrap: wrap; }
.proof-stage { position: relative; padding: 28px; }
.crop { position: absolute; width: 22px; height: 22px; pointer-events: none; }
.crop::before, .crop::after { content: ""; position: absolute; background: var(--mark); }
.crop::before { width: 16px; height: 1px; } .crop::after { width: 1px; height: 16px; }
.crop.tl { top: 6px; left: 6px; } .crop.tl::before { top: 21px; left: 0; } .crop.tl::after { left: 21px; top: 0; }
.crop.tr { top: 6px; right: 6px; } .crop.tr::before { top: 21px; right: 0; } .crop.tr::after { right: 21px; top: 0; }
.crop.bl { bottom: 6px; left: 6px; } .crop.bl::before { bottom: 21px; left: 0; } .crop.bl::after { left: 21px; bottom: 0; }
.crop.br { bottom: 6px; right: 6px; } .crop.br::before { bottom: 21px; right: 0; } .crop.br::after { right: 21px; bottom: 0; }
.dim-x, .dim-y { position: absolute; color: var(--ink-2); display: flex; align-items: center; gap: 6px; pointer-events: none; }
.dim-x { top: 0; left: 28px; right: 28px; justify-content: center; height: 22px; }
.dim-x::before, .dim-x::after { content: ""; flex: 1; border-top: 1px solid var(--rule); }
.dim-y { top: 28px; bottom: 28px; right: 0; width: 22px; writing-mode: vertical-rl; justify-content: center; }
.dim-y::before, .dim-y::after { content: ""; flex: 1; border-left: 1px solid var(--rule); }

.compare {
  --pos: 50%;
  position: relative; aspect-ratio: 612 / 792; max-width: 100%;
  background: #fff; box-shadow: var(--shadow-page); overflow: hidden;
  user-select: none; -webkit-user-select: none; touch-action: pan-y;
}
.compare img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.compare .layer-en { clip-path: inset(0 calc(100% - var(--pos)) 0 0); z-index: 2; }
.compare .layer-vi { z-index: 1; }
.compare svg.boxes { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 1; opacity: 0; transition: opacity var(--dur-2) var(--ease); }
.compare.show-boxes svg.boxes { opacity: 1; }
.compare svg.boxes rect { fill: rgb(10 122 140 / .07); stroke: #0a7a8c; stroke-width: .8; stroke-dasharray: 3 2; vector-effect: non-scaling-stroke; }
.compare-handle {
  position: absolute; top: 0; bottom: 0; left: var(--pos); z-index: 3; width: 0;
  border-left: 2px solid var(--teal); pointer-events: none;
}
.compare-handle .knob {
  position: absolute; top: 50%; left: 0; transform: translate(-50%, -50%);
  display: flex; gap: 2px; padding: 4px; border-radius: 999px;
  background: var(--teal); color: var(--on-teal); box-shadow: 0 4px 14px rgb(0 0 0 / .25);
  font: 600 11px/1 var(--font-mono);
}
.compare-handle .knob span { padding: 6px 7px; border-radius: 999px; }
.compare-handle .knob span + span { background: color-mix(in srgb, var(--on-teal) 22%, transparent); }
.compare-range {
  position: absolute; inset: 0; z-index: 4; width: 100%; height: 100%; margin: 0;
  opacity: 0; cursor: ew-resize; -webkit-appearance: none; appearance: none; background: transparent;
}
.compare-range::-webkit-slider-thumb { -webkit-appearance: none; width: 44px; height: 100vh; }
.compare-range::-moz-range-thumb { width: 44px; height: 100vh; border: 0; background: transparent; }
.compare:has(.compare-range:focus-visible) { outline: 2px solid var(--focus); outline-offset: 4px; }
.side-label {
  position: absolute; top: 10px; z-index: 3; padding: 3px 8px; border-radius: 3px;
  font: 500 11px/1.4 var(--font-mono); background: rgb(19 40 43 / .78); color: #fff; pointer-events: none;
}
.side-label.en { left: 10px; } .side-label.vi { right: 10px; background: rgb(10 122 140 / .92); }

.proof-controls { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--sp-3); }
.switch { display: inline-flex; align-items: center; gap: var(--sp-2); cursor: pointer; font-size: var(--fs-sm); color: var(--ink); font-weight: 500; }
.switch input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.switch .track { width: 38px; height: 22px; border-radius: 999px; background: var(--rule); position: relative; transition: background var(--dur-2) var(--ease); flex: none; }
.switch .track::after { content: ""; position: absolute; top: 3px; left: 3px; width: 16px; height: 16px; border-radius: 50%; background: var(--paper); box-shadow: 0 1px 2px rgb(0 0 0 / .25); transition: transform var(--dur-2) var(--ease); }
.switch input:checked + .track { background: var(--teal); }
.switch input:checked + .track::after { transform: translateX(16px); }
.switch input:focus-visible + .track { outline: 2px solid var(--focus); outline-offset: 2px; }
.proof-note { color: var(--ink-2); font-size: var(--fs-xs); }

/* ---------- Vấn đề ---------- */
.fails { display: grid; gap: var(--sp-5); grid-template-columns: 1fr; }
@media (min-width: 760px) { .fails { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.fail { display: grid; gap: var(--sp-3); align-content: start; padding-top: var(--sp-4); border-top: 1px solid var(--rule); min-width: 0; }
.fail-demo {
  height: 92px; display: flex; align-items: center; padding: 0 var(--sp-4);
  background: var(--paper); border: var(--border); border-radius: var(--radius-s); overflow: hidden; position: relative;
  font-size: 22px; font-weight: 600; color: var(--ink); letter-spacing: -0.01em;
}
.fail-demo.blurred span { filter: blur(1.1px); opacity: .85; image-rendering: pixelated; }
.fail-demo.blurred::after { content: "Ctrl+F: 0 kết quả"; position: absolute; right: 10px; bottom: 8px; font: 500 11px var(--font-mono); color: var(--error); }
.fail-demo.overflow .frame { position: absolute; left: var(--sp-4); top: 20px; width: 58%; height: 52px; border: 1.5px dashed var(--ink-2); border-radius: 2px; }
.fail-demo.overflow span { position: relative; white-space: nowrap; font-size: 19px; }
.fail-demo.overflow span em { font-style: normal; color: var(--error); background: var(--error-wash); }
.fail-demo.tofu span { color: var(--ink); }
.fail-demo.tofu b { color: var(--error); font-weight: 600; }
.fail p { color: var(--ink-2); font-size: var(--fs-sm); }
.answer {
  margin-top: var(--sp-7); display: grid; gap: var(--sp-6); align-items: center;
  grid-template-columns: 1fr; padding: var(--sp-6); background: var(--paper); border: var(--border); border-radius: var(--radius-m);
}
@media (min-width: 900px) { .answer { grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); } }
.answer h3 { font-size: var(--fs-xl); }
.answer ul { margin: var(--sp-4) 0 0; padding: 0; list-style: none; display: grid; gap: var(--sp-3); }
.answer li { display: grid; grid-template-columns: 22px minmax(0, 1fr); gap: var(--sp-2); color: var(--ink-2); font-size: var(--fs-sm); }
.answer li::before { content: "✓"; color: var(--teal-ink); font-weight: 700; }
.answer li strong { color: var(--ink); font-weight: 600; }
.zoom { margin: 0; display: grid; gap: var(--sp-2); min-width: 0; }
.zoom-frame { position: relative; background: #fff; border: var(--border); border-radius: var(--radius-s); overflow: hidden; }
.zoom-frame img { width: 100%; }
.zoom-frame::after {
  content: ""; position: absolute; left: 10%; top: 14%; width: 46%; height: 72%;
  border: 1.5px dashed #0a7a8c; border-radius: 2px; pointer-events: none;
}
.zoom figcaption { display: flex; justify-content: space-between; gap: var(--sp-3); color: var(--ink-2); flex-wrap: wrap; }

/* ---------- Bảng QA ---------- */
.qa-wrap { overflow-x: auto; background: var(--paper); border: var(--border); border-radius: var(--radius-m); }
.qa { width: 100%; border-collapse: collapse; min-width: 640px; font-size: var(--fs-sm); }
.qa caption { text-align: left; padding: var(--sp-4) var(--sp-5); color: var(--ink-2); border-bottom: var(--border); }
.qa th, .qa td { text-align: left; padding: var(--sp-4) var(--sp-5); border-bottom: var(--border); vertical-align: top; }
.qa tr:last-child td { border-bottom: 0; }
.qa thead th { font: 700 var(--fs-xs) var(--font-sans); text-transform: uppercase; letter-spacing: .08em; color: var(--ink-2); }
.qa td:first-child { font-weight: 600; white-space: nowrap; }
.qa td:first-child .label { display: block; font-weight: 500; }
.qa .result { color: var(--ink-2); font-variant-numeric: tabular-nums; }
.qa .result b { font-size: var(--fs-md); font-weight: 700; color: var(--ink); }
.pass { display: inline-flex; align-items: center; gap: 6px; padding: 2px 8px; border-radius: 3px; font: 600 11px/1.6 var(--font-mono); color: var(--pass); background: color-mix(in srgb, var(--pass) 12%, transparent); }
.pass::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

/* ---------- Chế độ xuất bản ---------- */
.modes { display: grid; gap: var(--sp-5); grid-template-columns: 1fr; }
@media (min-width: 760px) { .modes { grid-template-columns: repeat(3, minmax(0, 1fr)); } .mode.wide { grid-column: span 2; } }
.mode { margin: 0; display: grid; gap: var(--sp-3); align-content: start; min-width: 0; }
.mode-img { background: var(--paper); box-shadow: var(--shadow-page); }
.mode figcaption { display: grid; gap: 4px; }
.mode figcaption strong { font-size: var(--fs-md); }
.mode figcaption span { color: var(--ink-2); font-size: var(--fs-sm); }
.mode .mono { color: var(--teal-ink); }
.video-card {
  display: grid; gap: var(--sp-4); align-content: start; padding: var(--sp-6);
  background: var(--deep); color: var(--on-deep); border-radius: var(--radius-m); min-width: 0;
  border: 1px solid color-mix(in srgb, var(--on-deep) 14%, transparent);
}
.video-frame { position: relative; border-radius: 4px; overflow: hidden; background: #000; border: 1px solid color-mix(in srgb, var(--on-deep) 18%, transparent); }
.demo-video { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; max-width: 100%; background: #000; }
.video-card a { color: var(--on-deep-accent); }

/* Nghe thử giọng đọc: dải tối riêng, tô sáng câu đang đọc giống engine tô khung chữ trong video */
@media (min-width: 760px) { .mode.full { grid-column: 1 / -1; } }
.voices {
  display: grid; gap: var(--sp-5); padding: var(--sp-6); border-radius: var(--radius-m); min-width: 0;
  background: var(--deep); color: var(--on-deep);
  border: 1px solid color-mix(in srgb, var(--on-deep) 14%, transparent);
}
.voices-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: var(--sp-2) var(--sp-5); }
.voices-h { font-weight: 700; font-size: var(--fs-lg); color: var(--on-deep); letter-spacing: -0.01em; }
.voices-sub { color: color-mix(in srgb, var(--on-deep) 72%, transparent); font-size: var(--fs-sm); max-width: 52ch; }
.voices-row { display: grid; gap: var(--sp-4); grid-template-columns: 1fr; }
@media (min-width: 760px) { .voices-row { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.voices .mono { color: var(--on-deep-accent); }
.voice {
  display: grid; grid-template-columns: 48px minmax(0, 1fr); gap: var(--sp-4); align-items: start;
  padding: var(--sp-4); border-radius: var(--radius-m);
  background: color-mix(in srgb, var(--on-deep) 6%, transparent);
  border: 1px solid color-mix(in srgb, var(--on-deep) 12%, transparent);
  transition: border-color var(--dur-2) var(--ease), background var(--dur-2) var(--ease);
}
.voice.is-playing { border-color: var(--on-deep-accent); background: color-mix(in srgb, var(--on-deep-accent) 10%, transparent); }
.voice-btn {
  width: 48px; height: 48px; border-radius: 50%; border: 0; cursor: pointer;
  background: var(--on-deep-accent); color: var(--deep); display: grid; place-items: center;
  transition: transform var(--dur-1) var(--ease);
}
.voice-btn:hover { transform: scale(1.05); }
.voice-btn:focus-visible { outline: 2px solid var(--on-deep); outline-offset: 3px; }
.voice-btn .ico { width: 0; height: 0; border-style: solid; border-width: 8px 0 8px 13px; border-color: transparent transparent transparent currentColor; margin-left: 3px; }
.voice.is-playing .voice-btn .ico { width: 12px; height: 14px; border: 0; margin: 0; background: linear-gradient(to right, currentColor 0 35%, transparent 35% 65%, currentColor 65%); }
.voice-body { display: grid; gap: 6px; min-width: 0; }
.voice-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 4px var(--sp-3); }
.voice-head strong { color: var(--on-deep); font-size: var(--fs-md); }
.voices .voice-text { margin: 0; font-size: var(--fs-sm); line-height: 1.55; color: color-mix(in srgb, var(--on-deep) 72%, transparent); }
.voice-text span { border-radius: 2px; transition: color var(--dur-2) var(--ease), box-shadow var(--dur-2) var(--ease); }
.voice-text span.is-active { color: var(--on-deep); box-shadow: 0 0 0 1.5px var(--on-deep-accent); background: color-mix(in srgb, var(--on-deep-accent) 14%, transparent); }
.voice-bar { height: 3px; border-radius: 2px; background: color-mix(in srgb, var(--on-deep) 14%, transparent); overflow: hidden; }
.voice-bar i { display: block; height: 100%; width: 0; background: var(--on-deep-accent); transition: width .25s linear; }
.play-ico { width: 0; height: 0; border-style: solid; border-width: 6px 0 6px 10px; border-color: transparent transparent transparent currentColor; }
.video-card h3 { color: var(--on-deep); }
.video-card p { color: color-mix(in srgb, var(--on-deep) 80%, transparent); font-size: var(--fs-sm); }
.video-card .mono { color: var(--on-deep-accent); }

/* ---------- Quy trình ---------- */
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; counter-reset: step; border-top: 1px solid var(--rule); }
.steps li {
  counter-increment: step; display: grid; gap: var(--sp-2) var(--sp-5); padding-block: var(--sp-5);
  grid-template-columns: 44px minmax(0, 1fr); border-bottom: 1px solid var(--rule);
}
@media (min-width: 860px) { .steps li { grid-template-columns: 44px minmax(0, 1fr) minmax(0, 1.1fr); align-items: start; } }
.steps li::before { content: counter(step, decimal-leading-zero); font: 500 var(--fs-sm)/1.7 var(--font-mono); color: var(--teal-ink); }
.steps h3 { font-size: var(--fs-md); font-weight: 600; letter-spacing: 0; }
.steps p { color: var(--ink-2); font-size: var(--fs-sm); margin-top: 4px; }
.steps code, .cmd {
  display: block; font-family: var(--font-mono); font-size: var(--fs-xs); line-height: 1.6;
  background: var(--paper); border: var(--border); border-radius: var(--radius-s); padding: var(--sp-3) var(--sp-4);
  overflow-x: auto; white-space: pre; color: var(--ink); grid-column: 2;
}
@media (min-width: 860px) { .steps code { grid-column: 3; } }
.steps code .c { color: var(--ink-2); }
.gate { margin-top: var(--sp-5); display: flex; gap: var(--sp-3); align-items: baseline; color: var(--ink-2); font-size: var(--fs-sm); }
.gate strong { color: var(--ink); }

/* ---------- Nền tảng ---------- */
.matrix-wrap { overflow-x: auto; background: var(--paper); border: var(--border); border-radius: var(--radius-m); }
.matrix { width: 100%; min-width: 620px; border-collapse: collapse; font-size: var(--fs-sm); }
.matrix th, .matrix td { padding: var(--sp-4) var(--sp-5); border-bottom: var(--border); text-align: left; }
.matrix tbody tr:last-child th, .matrix tbody tr:last-child td { border-bottom: 0; }
.matrix thead th { font-weight: 700; font-size: var(--fs-md); vertical-align: bottom; }
.matrix thead th span { display: block; font: 500 var(--fs-xs)/1.5 var(--font-sans); color: var(--ink-2); }
.matrix tbody th { font-weight: 500; color: var(--ink); }
.matrix td { color: var(--ink-2); }
.yes { color: var(--pass); font-weight: 700; }
.no { color: var(--ink-2); }
.footnote { margin-top: var(--sp-3); color: var(--ink-2); font-size: var(--fs-xs); max-width: 80ch; }

/* ---------- Đăng ký ---------- */
.register .wrap { display: grid; gap: var(--sp-7); }
@media (min-width: 980px) { .register .wrap { grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); align-items: start; } }
.get-list { list-style: none; margin: var(--sp-5) 0 0; padding: 0; display: grid; gap: var(--sp-4); }
.get-list li { display: grid; grid-template-columns: 36px minmax(0, 1fr); gap: var(--sp-3); align-items: start; }
.get-list .ic { width: 36px; height: 36px; border-radius: var(--radius-s); background: var(--teal-wash); color: var(--teal-ink); display: grid; place-items: center; font: 600 13px var(--font-mono); }
.get-list strong { display: block; font-weight: 600; }
.get-list span { color: var(--ink-2); font-size: var(--fs-sm); }
.register-note { margin-top: var(--sp-5); color: var(--ink-2); font-size: var(--fs-sm); padding-left: var(--sp-4); border-left: 2px solid var(--rule); }

.form-card { background: var(--paper); border: var(--border); border-radius: var(--radius-m); padding: var(--sp-6); box-shadow: var(--shadow-page); min-width: 0; }
.form { display: grid; gap: var(--sp-5); }
.form-row { display: grid; gap: var(--sp-5); }
@media (min-width: 620px) { .form-row { grid-template-columns: 1fr 1fr; } }
.field { display: grid; gap: 6px; min-width: 0; }
.field > label, .field > .label, fieldset > legend { font-weight: 600; font-size: var(--fs-sm); color: var(--ink); padding: 0; }
.field .opt { font-weight: 400; color: var(--ink-2); }
.input, .select {
  width: 100%; min-height: 48px; padding: 0 var(--sp-4);
  font: 400 var(--fs-md) var(--font-sans); color: var(--ink);
  background: var(--paper); border: 1px solid var(--field-border); border-radius: var(--radius-s);
  transition: border-color var(--dur-1), box-shadow var(--dur-1);
}
.select { appearance: none; -webkit-appearance: none; padding-right: 40px; background-image: linear-gradient(45deg, transparent 50%, var(--ink-2) 50%), linear-gradient(135deg, var(--ink-2) 50%, transparent 50%); background-position: calc(100% - 20px) 21px, calc(100% - 15px) 21px; background-size: 5px 5px; background-repeat: no-repeat; }
.input::placeholder { color: color-mix(in srgb, var(--ink-2) 70%, transparent); }
.input:hover, .select:hover { border-color: var(--ink-2); }
.input:focus, .select:focus { outline: none; border-color: var(--teal); box-shadow: 0 0 0 3px color-mix(in srgb, var(--teal) 25%, transparent); }
.input[aria-invalid="true"], .select[aria-invalid="true"] { border-color: var(--error); }
.err { color: var(--error); font-size: var(--fs-xs); font-weight: 500; min-height: 0; }
fieldset { border: 0; margin: 0; padding: 0; min-width: 0; }
fieldset legend { margin-bottom: 6px; }
.chips { display: flex; flex-wrap: wrap; gap: var(--sp-2); }
.chip { position: relative; }
.chip input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.chip span {
  display: inline-flex; align-items: center; min-height: 40px; padding: 0 var(--sp-4);
  border: 1px solid var(--field-border); border-radius: var(--radius-s); background: var(--paper);
  font-size: var(--fs-sm); font-weight: 500; color: var(--ink); transition: border-color var(--dur-1), background var(--dur-1);
}
.chip input:hover + span { border-color: var(--ink-2); }
.chip input:checked + span { border-color: var(--teal); background: var(--teal-wash); color: var(--teal-ink); box-shadow: inset 0 0 0 1px var(--teal); }
.chip input:focus-visible + span { outline: 2px solid var(--focus); outline-offset: 2px; }
fieldset[aria-invalid="true"] .chip span { border-color: var(--error); }
.check { display: grid; grid-template-columns: 22px minmax(0, 1fr); gap: var(--sp-3); align-items: start; font-size: var(--fs-sm); color: var(--ink-2); cursor: pointer; }
.check input { width: 20px; height: 20px; margin: 2px 0 0; accent-color: var(--teal); cursor: pointer; }
.check strong { color: var(--ink); font-weight: 600; }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.form-foot { display: flex; flex-wrap: wrap; align-items: center; gap: var(--sp-4); }
.form-status { font-size: var(--fs-sm); }
.form-status.is-error { color: var(--error); font-weight: 500; }
.done { display: grid; gap: var(--sp-4); }
.done .tick { width: 48px; height: 48px; border-radius: 50%; display: grid; place-items: center; background: var(--teal-wash); color: var(--teal-ink); font-size: 24px; font-weight: 700; }
.done h3 { font-size: var(--fs-xl); }
.done p { color: var(--ink-2); }
.done .demo-note { font-size: var(--fs-xs); color: var(--error); }

/* ---------- Ủng hộ ---------- */
.coffee { margin-top: var(--sp-9); }
.coffee .wrap > .inner {
  display: grid; gap: var(--sp-7); padding: var(--sp-7) var(--sp-6);
  background: var(--paper); border: var(--border); border-radius: var(--radius-m);
}
@media (min-width: 900px) { .coffee .wrap > .inner { grid-template-columns: minmax(0, 1fr) auto; align-items: center; padding: var(--sp-8); } }
.coffee p { color: var(--ink-2); max-width: 46ch; }
.coffee .copy { display: grid; gap: var(--sp-4); }
.qr-block { display: grid; gap: var(--sp-4); justify-items: center; }
@media (min-width: 620px) { .qr-block { grid-template-columns: auto minmax(0, 1fr); justify-items: start; align-items: start; } }
.qr-img { width: 220px; height: 220px; background: #fff; border: var(--border); border-radius: var(--radius-s); padding: 6px; image-rendering: pixelated; }
.qr-side { display: grid; gap: var(--sp-4); min-width: 0; }
.amounts { display: flex; flex-wrap: wrap; gap: var(--sp-2); }
.amounts .chip span { min-height: 36px; font-variant-numeric: tabular-nums; }
.bank { display: grid; gap: var(--sp-2); margin: 0; font-size: var(--fs-sm); }
.bank div { display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: var(--sp-2); align-items: center; min-height: 34px; }
.bank dt { color: var(--ink-2); }
.bank dd { margin: 0; font-weight: 600; overflow-wrap: anywhere; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--sp-2); }
.bank dd .mono { font-size: var(--fs-sm); font-weight: 600; }
.copy-btn { min-height: 32px; padding: 0 10px; font: 500 var(--fs-xs) var(--font-sans); border: 1px solid var(--field-border); background: var(--paper); color: var(--ink); border-radius: var(--radius-s); cursor: pointer; }
.copy-btn:hover { border-color: var(--ink-2); }
.copy-btn.ok { color: var(--pass); border-color: var(--pass); }
.qr-caption { color: var(--ink-2); font-size: var(--fs-xs); }

/* ---------- Hỏi đáp ---------- */
.faq { display: grid; gap: 0; max-width: 860px; border-top: 1px solid var(--rule); }
.faq details { border-bottom: 1px solid var(--rule); }
.faq summary {
  list-style: none; cursor: pointer; padding: var(--sp-5) 0; display: flex; justify-content: space-between; gap: var(--sp-4);
  font-weight: 600; font-size: var(--fs-md);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font: 400 22px/1 var(--font-mono); color: var(--teal-ink); transition: transform var(--dur-2) var(--ease); }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details > div { padding: 0 0 var(--sp-5); color: var(--ink-2); max-width: var(--measure); display: grid; gap: var(--sp-3); }

/* ---------- Chân trang ---------- */
.footer { margin-top: var(--sp-9); padding-block: var(--sp-7); border-top: 1px solid var(--rule); color: var(--ink-2); font-size: var(--fs-sm); }
.footer .wrap { display: grid; gap: var(--sp-4); }
@media (min-width: 860px) { .footer .wrap { grid-template-columns: 1fr auto; } }
.footer nav { display: flex; flex-wrap: wrap; gap: var(--sp-4); }
.footer .credit { font-size: var(--fs-xs); max-width: 80ch; }

/* ---------- Trang văn bản (privacy) ---------- */
.doc { padding-block: var(--sp-8); }
.doc .wrap > article { max-width: 760px; display: grid; gap: var(--sp-5); }
.doc h1 { font-size: var(--fs-2xl); }
.doc h2 { font-size: var(--fs-lg); margin-top: var(--sp-4); }
.doc p, .doc li { color: var(--ink-2); }
.doc ul { margin: 0; padding-left: 1.2em; display: grid; gap: var(--sp-2); }
@media (max-width: 479px) {
  .voices { padding: var(--sp-5); }
  .voice { padding: var(--sp-3); gap: var(--sp-3); grid-template-columns: 44px minmax(0, 1fr); }
  .voice-btn { width: 44px; height: 44px; }
}