/* phapphuc.vn — giao diện Loom (Hallmark, MIT). Một file CSS dùng chung cho mọi trang. */
/* ===== Loom (Hallmark, MIT) — khối token gốc, giữ nguyên ===== */
:root {
  --color-paper: oklch(95.5% 0.014 85); --color-paper-2: oklch(92% 0.022 84); --color-paper-3: oklch(85% 0.032 80);
  --color-ink: oklch(21% 0.012 60); --color-ink-2: oklch(31% 0.012 60); --color-muted: oklch(46% 0.014 62);
  --color-rule: oklch(83% 0.022 84); --color-rule-ink: oklch(21% 0.012 60);
  --color-accent: oklch(34% 0.115 267); --color-accent-2: oklch(43% 0.125 267); --color-accent-ink: oklch(95.5% 0.014 85); --color-focus: oklch(43% 0.15 267);
  --font-display: "Libre Caslon Display", "Libre Caslon Text", ui-serif, Georgia, serif; --font-body: "Hanken Grotesk", ui-sans-serif, system-ui, sans-serif;
  --font-outlier: "DM Mono", ui-monospace, monospace;
  --radius-card: 0; --radius-pill: 0; --rule-hair: 1px; --rule-ink: 2px;
  --shadow-card: none;
  --tracking-display: -0.01em; --display-weight: 400;
}

/* ===== Thay font cho tiếng Việt (màu và chất liệu giữ nguyên) ===== */
:root {
  --font-display: "Cormorant Garamond", "Cormorant", Georgia, "Times New Roman", serif;
  --font-outlier: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
}

/* ===== Thang đo bổ sung (theme dùng nhưng chưa khai báo) ===== */
:root {
  --space-2xs: 4px; --space-xs: 8px; --space-sm: 12px; --space-md: 16px; --space-lg: 24px;
  --space-xl: 40px; --space-2xl: 64px; --space-3xl: 104px;
  --text-sm: 0.9375rem; --text-base: 1.0625rem; --text-title: 1.25rem;
  --text-figure: 2.25rem;
  --text-h2: clamp(2.25rem, 1.6rem + 2.4vw, 3.5rem);
  --text-h1: clamp(2.75rem, 1.7rem + 4.6vw, 5.25rem);
  --dur-short: 160ms; --ease-out: cubic-bezier(.2, .7, .2, 1);
  --wrap: 1240px; --gutter: clamp(20px, 4vw, 48px);
  --rule-on-indigo: color-mix(in oklab, var(--color-accent-ink) 32%, var(--color-accent));
  --text-on-indigo-quiet: color-mix(in oklab, var(--color-accent-ink) 84%, var(--color-accent));
}

/* ===== Nền ===== */
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body {
  margin: 0; background: var(--color-paper); color: var(--color-ink);
  font: 400 var(--text-base)/1.5 var(--font-body);
  text-rendering: optimizeLegibility; -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
h1, h2, h3 { margin: 0; font-weight: 400; font-synthesis: none; }
h1, h2 {
  font-family: var(--font-display); font-weight: var(--display-weight);
  letter-spacing: var(--tracking-display); line-height: 1.1; /* tối thiểu 1.1 để dấu tiếng Việt không chạm nhau */
  text-wrap: balance;
}
h1 { font-size: var(--text-h1); }
h2 { font-size: var(--text-h2); }
h3 { font: 500 var(--text-title)/1.25 var(--font-body); color: var(--color-ink); }
p { margin: 0; }
.lead { color: var(--color-muted); font-size: clamp(1.0625rem, 1rem + .3vw, 1.1875rem); max-width: 34em; text-wrap: pretty; }
.num { font-family: var(--font-outlier); font-variant-numeric: tabular-nums; }
.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: clamp(64px, 8vw, var(--space-3xl)); }
.section-head { display: grid; gap: var(--space-md); margin-bottom: clamp(32px, 4vw, 48px); }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Focus */
:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 3px; }
.band--indigo :focus-visible { outline-color: var(--color-accent-ink); }

.skip {
  position: absolute; left: var(--space-md); top: -100px; z-index: 10;
  background: var(--color-accent); color: var(--color-accent-ink); padding: var(--space-sm) var(--space-md);
  font-weight: 500; text-decoration: none;
}
.skip:focus { top: var(--space-md); }

/* ===== Điều khiển ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; min-height: 48px;
  padding: var(--space-md) var(--space-lg); border: 0; border-radius: var(--radius-pill);
  font: 500 var(--text-sm)/1 var(--font-body); text-decoration: none; cursor: pointer;
  background: var(--color-accent); color: var(--color-accent-ink);
  transition: background-color var(--dur-short) var(--ease-out);
}
.btn:hover { background: var(--color-accent-2); }
.btn[disabled] { cursor: progress; opacity: .85; }
.link {
  font-weight: 500; color: inherit; padding-block: var(--space-2xs);
  border-bottom: 2px solid currentColor; text-decoration: none;
  transition: border-color var(--dur-short) var(--ease-out);
}
.link:hover { border-color: var(--color-accent); }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-md) var(--space-lg); }

/* ===== Header ===== */
.site-head { border-bottom: var(--rule-ink) solid var(--color-rule-ink); }
.head-bar { display: flex; align-items: center; gap: var(--space-lg); min-height: 76px; }
.head-bar .btn { white-space: nowrap; }
.brand {
  font: var(--display-weight) 2rem/1 var(--font-display); letter-spacing: var(--tracking-display);
  color: var(--color-ink); text-decoration: none; margin-right: auto; white-space: nowrap;
}
.nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: var(--space-lg); }
.nav a {
  color: var(--color-ink); text-decoration: none; font-weight: 500; font-size: var(--text-sm);
  padding-block: var(--space-2xs); border-bottom: 2px solid transparent;
  transition: border-color var(--dur-short) var(--ease-out);
}
.nav a:hover { border-color: var(--color-accent); }
.menu-toggle {
  display: none; min-width: 48px; min-height: 48px; padding: 0 var(--space-sm);
  background: none; border: 1px solid var(--color-rule); border-radius: 0; color: var(--color-ink);
  font: 500 var(--text-sm)/1 var(--font-body); cursor: pointer;
}
.mobile-nav { display: none; }

@media (max-width: 960px) {
  .nav { display: none; }
  .menu-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .head-bar { gap: var(--space-sm); min-height: 68px; }
  .head-bar .btn { padding-inline: 14px; }
  .mobile-nav:not([hidden]) { display: block; border-top: 1px solid var(--color-rule); }
  .mobile-nav ul { list-style: none; margin: 0; padding: 0; }
  .mobile-nav li + li { border-top: 1px solid var(--color-rule); }
  .mobile-nav a {
    display: flex; align-items: center; min-height: 52px; color: var(--color-ink);
    text-decoration: none; font-weight: 500;
  }
}
@media (max-width: 480px) { .brand { font-size: 1.75rem; } }

/* ===== Hàng thông số (pattern-book) ===== */
.spec { margin: 0; border-top: var(--rule-ink) solid var(--color-rule-ink); }
.spec > div {
  display: grid; grid-template-columns: minmax(6.5rem, 9rem) 1fr; gap: var(--space-md);
  align-items: baseline; padding-block: var(--space-sm); border-bottom: 1px solid var(--color-rule);
}
.spec dt { font: 500 var(--text-sm)/1.4 var(--font-body); color: var(--color-muted); }
.spec dd { margin: 0; font: 500 var(--text-title)/1.35 var(--font-body); color: var(--color-ink); }
@media (max-width: 520px) { .spec > div { grid-template-columns: 7rem 1fr; } }
.spec .price dd {
  font: var(--display-weight) var(--text-figure)/1.1 var(--font-display);
  letter-spacing: var(--tracking-display);
}

/* ===== Ảnh (chỗ chờ ảnh thật) ===== */
.photo { margin: 0; }
.photo-slot {
  aspect-ratio: 4 / 5; background: var(--color-paper-3); display: grid; place-items: center;
  padding: var(--space-lg); text-align: center; color: var(--color-ink-2);
  font: 500 var(--text-sm)/1.45 var(--font-body);
  outline: 1px solid color-mix(in oklab, var(--color-ink) 8%, transparent); outline-offset: -1px;
}
.photo-slot span { max-width: 18em; }
.photo figcaption { margin-top: var(--space-sm); font: 500 var(--text-sm)/1.4 var(--font-body); color: var(--color-muted); }

/* ===== Hero ===== */
.hero { padding-block: clamp(40px, 6vw, 88px) 0; }
.hero-grid {
  display: grid; gap: var(--space-xl) clamp(40px, 6vw, 88px);
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  grid-template-areas: "text photo" "facts photo";
  align-items: start;
}
.hero-text { grid-area: text; display: grid; gap: var(--space-lg); }
.hero-text .actions { margin-top: var(--space-xs); }
.hero .photo { grid-area: photo; }
.hero .spec { grid-area: facts; align-self: end; max-width: 40rem; }
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; grid-template-areas: "text" "photo" "facts"; }
  .hero .photo-slot { aspect-ratio: 4 / 3; }
}

/* ===== Sản phẩm ===== */
.products { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-xl) clamp(24px, 3vw, 40px); }
.product { display: grid; gap: var(--space-md); align-content: start; scroll-margin-top: var(--space-lg); }
.product p { color: var(--color-muted); }
.product .spec { margin-top: var(--space-xs); }
.product .link { justify-self: start; margin-top: var(--space-xs); }
@media (max-width: 900px) {
  .products { grid-template-columns: 1fr; gap: var(--space-2xl); }
  .product .photo-slot { aspect-ratio: 4 / 3; }
}

/* ===== Band giấy: so sánh hai cách may ===== */
.band--paper { background: var(--color-paper-2); }
.compare { width: 100%; border-collapse: collapse; }
.compare th, .compare td { text-align: left; vertical-align: top; padding: var(--space-md) var(--space-lg) var(--space-md) 0; }
.compare thead th {
  font: 500 var(--text-title)/1.3 var(--font-body); color: var(--color-ink);
  border-bottom: var(--rule-ink) solid var(--color-rule-ink); padding-top: 0;
}
.compare tbody th { width: 22%; font: 500 var(--text-sm)/1.4 var(--font-body); color: var(--color-muted); padding-top: calc(var(--space-md) + 3px); }
.compare tbody tr { border-bottom: 1px solid var(--color-rule); }
.compare td { width: 39%; }
.compare tr > :last-child { padding-left: var(--space-lg); border-left: var(--rule-ink) solid var(--color-rule-ink); padding-right: 0; }
.compare .fig { font: var(--display-weight) var(--text-figure)/1.1 var(--font-display); letter-spacing: var(--tracking-display); }
.compare-actions { margin-top: var(--space-xl); }
@media (max-width: 640px) {
  .compare, .compare thead, .compare tbody { display: block; }
  .compare tr { display: grid; grid-template-columns: 1fr 1fr; }
  .compare thead th:first-child { display: none; }
  .compare tbody th { grid-column: 1 / -1; width: auto; padding: var(--space-md) 0 0; }
  .compare td { width: auto; padding: var(--space-xs) var(--space-md) var(--space-md) 0; }
  .compare thead th { padding-right: var(--space-md); }
  .compare tr > :last-child { padding-left: var(--space-md); }
  .compare .fig { font-size: 2rem; }
}

/* ===== Size và số đo ===== */
.size-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: var(--space-xl) clamp(40px, 6vw, 88px); align-items: start; }
.size-grid h3 { margin-bottom: var(--space-md); }
.size-table { width: 100%; border-collapse: collapse; }
.size-table th, .size-table td { text-align: left; padding: var(--space-sm) var(--space-md) var(--space-sm) 0; border-bottom: 1px solid var(--color-rule); }
.size-table thead th { font: 500 var(--text-sm)/1.4 var(--font-body); color: var(--color-muted); border-bottom: var(--rule-ink) solid var(--color-rule-ink); }
.size-table tbody th { font-weight: 500; }
.note { margin-top: var(--space-md); color: var(--color-muted); font-size: var(--text-sm); max-width: 32em; }

.measure-sheet { background: var(--color-paper-3); padding: clamp(24px, 3vw, 40px); scroll-margin-top: var(--space-lg); }
.measure-sheet h3 { margin-bottom: var(--space-xs); }
.measure-sheet .intro { color: var(--color-ink-2); margin-bottom: var(--space-lg); max-width: 36em; }
.measures { list-style: none; margin: 0; padding: 0; border-top: var(--rule-ink) solid var(--color-rule-ink); }
.measures li {
  display: grid; grid-template-columns: 8.5rem 1fr; gap: var(--space-md); align-items: baseline;
  padding-block: var(--space-sm); border-bottom: 1px solid color-mix(in oklab, var(--color-ink) 18%, var(--color-paper-3));
}
.measures strong { font-weight: 500; }
.measures span { color: var(--color-ink-2); }
@media (max-width: 860px) { .size-grid { grid-template-columns: 1fr; } }
@media (max-width: 520px) {
  .measures li { grid-template-columns: 1fr; gap: var(--space-2xs); }
}

/* ===== Quy trình ===== */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-xl) clamp(24px, 3vw, 40px); counter-reset: step; }
.steps li { counter-increment: step; border-top: var(--rule-ink) solid var(--color-rule-ink); padding-top: var(--space-md); display: grid; gap: var(--space-sm); align-content: start; }
.steps li::before {
  content: counter(step); font: var(--display-weight) 2.75rem/1 var(--font-display);
  letter-spacing: var(--tracking-display); color: var(--color-ink);
}
.steps p { color: var(--color-muted); }
@media (max-width: 900px) { .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; gap: var(--space-lg); } }

/* ===== Band chàm: đặt hàng ===== */
.band--indigo { background: var(--color-accent); color: var(--color-accent-ink); scroll-margin-top: 0; }
.band--indigo .btn { background: var(--color-paper); color: var(--color-accent); }
.band--indigo .btn:hover { background: var(--color-paper-2); }
.band--indigo h2 { color: var(--color-accent-ink); }
.band--indigo .lead { color: var(--text-on-indigo-quiet); }
.order-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: var(--space-2xl) clamp(40px, 6vw, 96px); align-items: start; }
.order-intro { display: grid; gap: var(--space-lg); }
.contact { margin: var(--space-xs) 0 0; border-top: var(--rule-ink) solid var(--color-accent-ink); }
.contact > div { display: grid; grid-template-columns: 7rem 1fr; gap: var(--space-md); padding-block: var(--space-sm); border-bottom: 1px solid var(--rule-on-indigo); }
.contact dt { font: 500 var(--text-sm)/1.4 var(--font-body); color: var(--text-on-indigo-quiet); }
.contact dd { margin: 0; font-weight: 500; }
@media (max-width: 900px) { .order-grid { grid-template-columns: 1fr; } }

/* Form */
.form { display: grid; gap: var(--space-lg); }
.row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-lg) var(--space-md); }
.field { display: grid; gap: var(--space-xs); align-content: start; }
.field label, .field legend, .fieldset legend { font: 500 var(--text-sm)/1.4 var(--font-body); color: var(--color-accent-ink); padding: 0; }
.req { font-weight: 400; color: var(--text-on-indigo-quiet); }
.hint { font-size: var(--text-sm); color: var(--text-on-indigo-quiet); }
.form input[type="text"], .form input[type="tel"], .form input[type="number"], .form select, .form textarea {
  width: 100%; min-height: 48px; padding: var(--space-sm) 14px; margin: 0;
  background: var(--color-paper); color: var(--color-ink);
  border: 1px solid var(--color-rule); border-radius: 0;
  font: 400 var(--text-base)/1.4 var(--font-body);
}
.form select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--color-ink) 50%), linear-gradient(135deg, var(--color-ink) 50%, transparent 50%); background-position: calc(100% - 20px) 52%, calc(100% - 15px) 52%; background-size: 5px 5px; background-repeat: no-repeat; padding-right: 40px; }
.form textarea { min-height: 112px; resize: vertical; }
.form input[aria-invalid="true"], .form select[aria-invalid="true"] { border: 2px solid var(--color-ink); box-shadow: 0 0 0 2px var(--color-accent-ink); }
.form .num-input { font-family: var(--font-outlier); font-variant-numeric: tabular-nums; }
.error { font: 500 var(--text-sm)/1.4 var(--font-body); color: var(--color-accent-ink); padding-left: var(--space-sm); border-left: 2px solid var(--color-accent-ink); }
.error:empty { display: none; }
.fieldset { border: 0; margin: 0; padding: 0; min-width: 0; display: grid; gap: var(--space-xs); }
.choices { display: grid; grid-template-columns: 1fr 1fr; gap: 0; }
.choice { position: relative; display: block; cursor: pointer; }
.choice input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.choice span {
  display: flex; align-items: center; justify-content: center; min-height: 48px; padding: var(--space-sm);
  border: 1px solid var(--color-accent-ink); text-align: center; font-weight: 500; line-height: 1.25;
  transition: background-color var(--dur-short) var(--ease-out);
}
.choice + .choice span { border-left: 0; }
.choice input:checked + span { background: var(--color-paper); color: var(--color-accent); }
.choice input:focus-visible + span { outline: 2px solid var(--color-accent-ink); outline-offset: 3px; }
.measure-fields { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-md); }
.measure-fields[hidden], .field[hidden] { display: none; }
.consent { display: grid; grid-template-columns: 24px 1fr; gap: var(--space-sm); align-items: start; font-size: var(--text-sm); }
.consent input { width: 22px; height: 22px; margin: 1px 0 0; accent-color: var(--color-paper); }
.consent a { color: inherit; }
.submit-row { display: grid; gap: var(--space-md); justify-items: start; }
.status { font-weight: 500; padding-top: var(--space-sm); border-top: 2px solid var(--color-accent-ink); max-width: 36em; }
.status:empty { display: none; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
@media (max-width: 560px) {
  .row-2 { grid-template-columns: 1fr; }
  .row-2.keep { grid-template-columns: 1fr 1fr; }
  .measure-fields { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ===== Footer ===== */
.site-foot { padding-block: var(--space-xl) var(--space-2xl); font-size: var(--text-sm); color: var(--color-muted); }
.site-foot .wrap { display: grid; grid-template-columns: 1fr auto; gap: var(--space-lg) var(--space-xl); }
.site-foot p + p { margin-top: var(--space-2xs); }
.site-foot ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: var(--space-sm) var(--space-lg); }
.site-foot a { color: var(--color-ink); font-weight: 500; text-decoration: none; border-bottom: 1px solid var(--color-rule); }
.site-foot a:hover { border-color: var(--color-accent); }
@media (max-width: 760px) { .site-foot .wrap { grid-template-columns: 1fr; } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}

/* ===== Trang chính sách ===== */
.policy-head { padding-block: clamp(40px, 6vw, 88px) clamp(32px, 4vw, 56px); }
.policy-head .wrap { display: grid; gap: var(--space-md); }
.updated { color: var(--color-muted); font-size: var(--text-sm); }
.policy-grid { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 8fr); gap: var(--space-xl) clamp(40px, 6vw, 96px); align-items: start; padding-bottom: clamp(64px, 8vw, var(--space-3xl)); }
.toc { position: sticky; top: var(--space-lg); }
.toc p { font: 500 var(--text-sm)/1.4 var(--font-body); color: var(--color-muted); margin-bottom: var(--space-sm); }
.toc ol { list-style: none; margin: 0; padding: 0; border-top: var(--rule-ink) solid var(--color-rule-ink); }
.toc li { border-bottom: 1px solid var(--color-rule); }
.toc a { display: block; padding-block: 10px; color: var(--color-ink); text-decoration: none; font-size: var(--text-sm); font-weight: 500; }
.toc a:hover { text-decoration: underline; text-decoration-color: var(--color-accent); text-decoration-thickness: 2px; text-underline-offset: 4px; }
.toc-mobile { display: none; border-top: var(--rule-ink) solid var(--color-rule-ink); border-bottom: 1px solid var(--color-rule); margin-bottom: var(--space-xl); }
.toc-mobile summary { min-height: 48px; display: flex; align-items: center; justify-content: space-between; font-weight: 500; cursor: pointer; list-style: none; }
.toc-mobile summary::-webkit-details-marker { display: none; }
.toc-mobile summary::after { content: '+'; font: 400 1.5rem/1 var(--font-body); }
.toc-mobile[open] summary::after { content: '\\2212'; }
.toc-mobile ol { list-style: none; margin: 0 0 var(--space-sm); padding: 0; }
.toc-mobile a { display: block; padding-block: 8px; color: var(--color-ink); }
.prose { max-width: 42em; }
.prose section { padding-top: var(--space-xl); scroll-margin-top: var(--space-lg); }
.prose section:first-child { padding-top: 0; }
.prose h2 { font-size: 2rem; margin-bottom: var(--space-md); }
.prose h3 { margin: var(--space-lg) 0 var(--space-xs); }
.prose p, .prose li { color: var(--color-ink-2); }
.prose p + p { margin-top: var(--space-sm); }
.prose ul { margin: var(--space-sm) 0 0; padding-left: 1.2em; }
.prose li + li { margin-top: var(--space-xs); }
.prose ol { margin: var(--space-sm) 0 0; padding-left: 1.4em; }
.prose table + p, .prose ul + p, .prose ol + p { margin-top: var(--space-md); }
.prose table { width: 100%; border-collapse: collapse; margin-top: var(--space-md); }
.prose th, .prose td { text-align: left; vertical-align: top; padding: var(--space-sm) var(--space-md) var(--space-sm) 0; border-bottom: 1px solid var(--color-rule); }
.prose thead th { font: 500 var(--text-sm)/1.4 var(--font-body); color: var(--color-muted); border-bottom: var(--rule-ink) solid var(--color-rule-ink); }
.prose tbody th { font-weight: 500; color: var(--color-ink); }
.prose a { color: var(--color-ink); font-weight: 500; text-decoration: none; border-bottom: 2px solid currentColor; transition: border-color var(--dur-short) var(--ease-out); }
.prose a:hover { border-color: var(--color-accent); }
.ask-band { padding-block: clamp(48px, 6vw, 80px); }
.ask-band .wrap { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: var(--space-lg) var(--space-xl); align-items: end; }
.ask-band h2 { font-size: 2.25rem; }
.ask-band p { color: var(--color-muted); margin-top: var(--space-sm); max-width: 36em; }
@media (max-width: 860px) {
  .policy-grid { grid-template-columns: 1fr; }
  .toc { display: none; }
  .toc-mobile { display: block; }
  .ask-band .wrap { grid-template-columns: 1fr; align-items: start; }
}

/* ===================================================================
   Bổ sung cho site nhiều trang
   =================================================================== */

.nav a[aria-current="page"] { border-color: var(--color-ink); }
.mobile-nav a[aria-current="page"] { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 6px; }
.head-bar .btn[aria-current="page"] { background: var(--color-accent-2); }

/* Breadcrumb */
.crumbs { padding-top: var(--space-lg); font-size: var(--text-sm); color: var(--color-muted); }
.crumbs ol { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: var(--space-2xs) var(--space-xs); }
.crumbs li + li::before { content: "/"; margin-right: var(--space-xs); color: var(--color-muted); }
.crumbs a { color: var(--color-ink); text-decoration: none; border-bottom: 1px solid var(--color-rule); }
.crumbs a:hover { border-color: var(--color-accent); }

/* Đầu trang con */
.page-head { padding-block: clamp(28px, 4vw, 56px) clamp(32px, 4vw, 56px); }
.page-head .wrap { display: grid; gap: var(--space-md); }
.page-head .lead { max-width: 38em; }

/* Lối tắt danh mục */
.chips { display: flex; flex-wrap: wrap; gap: var(--space-sm); margin-top: var(--space-xs); }
.chip {
  min-height: 44px; display: inline-flex; align-items: center; padding: 0 var(--space-md);
  border: 1px solid var(--color-muted); color: var(--color-ink); text-decoration: none;
  font: 500 var(--text-sm)/1.2 var(--font-body);
  transition: background-color var(--dur-short) var(--ease-out);
}
.chip:hover { background: var(--color-paper-2); }
.chip[aria-current="page"] { background: var(--color-accent); border-color: var(--color-accent); color: var(--color-accent-ink); }

/* Lưới mẫu */
.grid-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-xl) clamp(20px, 3vw, 40px); }
.card { display: grid; gap: var(--space-xs); align-content: start; color: inherit; text-decoration: none; }
.card .photo-slot { margin-bottom: var(--space-xs); }
.card h3 { text-decoration: underline; text-decoration-color: transparent; text-decoration-thickness: 2px; text-underline-offset: 5px; transition: text-decoration-color var(--dur-short) var(--ease-out); }
.card:hover h3 { text-decoration-color: var(--color-accent); }
.card .meta { color: var(--color-muted); font-size: var(--text-sm); }
.card .price { font-weight: 500; }
.group + .group { margin-top: clamp(56px, 7vw, 96px); }
.group-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: var(--space-sm) var(--space-lg); margin-bottom: var(--space-lg); }
.group-head h2 { font-size: clamp(2rem, 1.6rem + 1.4vw, 2.75rem); }
@media (max-width: 900px) { .grid-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-xl) var(--space-md); } }
@media (max-width: 520px) { .card h3 { font-size: var(--text-base); } }

/* Dải lời mời (nền giấy) */
.cta-band { padding-block: clamp(48px, 6vw, 80px); }
.cta-band .wrap { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: var(--space-lg) var(--space-xl); align-items: end; }
.cta-band h2 { font-size: clamp(2rem, 1.6rem + 1.4vw, 2.75rem); }
.cta-band p { color: var(--color-muted); margin-top: var(--space-sm); max-width: 36em; }
.band--indigo.cta-band p { color: var(--text-on-indigo-quiet); }
@media (max-width: 760px) { .cta-band .wrap { grid-template-columns: 1fr; align-items: start; } }

/* Trang mẫu */
.pdp { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: var(--space-xl) clamp(40px, 5vw, 80px); align-items: start; padding-block: var(--space-lg) clamp(56px, 7vw, 96px); }
.gallery { display: grid; gap: var(--space-sm); }
.thumbs { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-sm); }
.thumb {
  aspect-ratio: 1; display: grid; place-items: center; padding: 6px; cursor: pointer;
  background: var(--color-paper-3); color: var(--color-ink-2); border: 2px solid transparent; border-radius: 0;
  font: 500 0.875rem/1.3 var(--font-body); text-align: center;
}
.thumb[aria-pressed="true"] { border-color: var(--color-ink); }
.buybox { display: grid; gap: var(--space-lg); position: sticky; top: var(--space-lg); }
.buybox h1 { font-size: clamp(2.25rem, 1.8rem + 1.6vw, 3.25rem); }
.buybox .sku { color: var(--color-muted); font-size: var(--text-sm); margin-top: var(--space-xs); }
.figure-price { font: var(--display-weight) 2.75rem/1.1 var(--font-display); letter-spacing: var(--tracking-display); }
.buy { display: grid; gap: var(--space-lg); }
.opt { border: 0; margin: 0; padding: 0; min-width: 0; }
.opt legend { width: 100%; padding: 0; margin-bottom: var(--space-sm); display: flex; justify-content: space-between; align-items: baseline; gap: var(--space-md); font: 500 var(--text-sm)/1.4 var(--font-body); color: var(--color-muted); }
.pills { display: flex; flex-wrap: wrap; gap: var(--space-xs); }
.pill { position: relative; display: inline-block; }
.pill input { position: absolute; inset: 0; opacity: 0; margin: 0; cursor: pointer; }
.pill span {
  display: inline-flex; align-items: center; justify-content: center; min-width: 56px; min-height: 44px; padding: 0 var(--space-md);
  border: 1px solid var(--color-muted); font-weight: 500; font-size: var(--text-sm);
  transition: background-color var(--dur-short) var(--ease-out);
}
.pill input:checked + span { background: var(--color-accent); border-color: var(--color-accent); color: var(--color-accent-ink); }
.pill input:focus-visible + span { outline: 2px solid var(--color-focus); outline-offset: 3px; }
.text-btn { background: none; border: 0; padding: 0; font: 500 var(--text-sm)/1.4 var(--font-body); color: var(--color-ink); border-bottom: 2px solid currentColor; cursor: pointer; text-decoration: none; }
.text-btn:hover { border-color: var(--color-accent); }
.qty { display: grid; gap: var(--space-xs); justify-items: start; }
.qty label { font: 500 var(--text-sm)/1.4 var(--font-body); color: var(--color-muted); }
.qty input { width: 6.5rem; min-height: 48px; padding: var(--space-sm) 14px; border: 1px solid var(--color-muted); border-radius: 0; background: var(--color-paper); color: var(--color-ink); font: 400 var(--text-base)/1.4 var(--font-outlier); }
.buy .error { color: var(--color-ink); border-left-color: var(--color-ink); margin-top: var(--space-sm); }
.buy .hint { color: var(--color-muted); font-size: var(--text-sm); margin-top: var(--space-sm); }
.spec.small dd { font-size: var(--text-base); font-weight: 400; }
.spec.small dd a { color: var(--color-ink); font-weight: 500; }
.pdp-more { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); gap: var(--space-xl) clamp(40px, 6vw, 96px); padding-bottom: clamp(56px, 7vw, 96px); }
.pdp-more h2 { font-size: 2rem; margin-bottom: var(--space-md); }
@media (max-width: 900px) {
  .pdp, .pdp-more { grid-template-columns: 1fr; }
  .buybox { position: static; }
}

/* Hộp thoại */
dialog.sheet {
  border: 0; border-radius: 0; padding: clamp(24px, 4vw, 40px); width: min(640px, calc(100% - 32px)); max-height: calc(100% - 32px);
  background: var(--color-paper); color: var(--color-ink); box-shadow: none;
}
dialog.sheet::backdrop { background: color-mix(in oklab, var(--color-ink) 55%, transparent); }
.sheet-head { display: flex; justify-content: space-between; align-items: start; gap: var(--space-lg); margin-bottom: var(--space-lg); }
.sheet-head h2 { font-size: 2rem; }

/* Đặt hàng: mẫu đã chọn */
.band--indigo h1 { color: var(--color-accent-ink); }
.band--indigo h3 { color: var(--color-accent-ink); }
.band--indigo .link { color: var(--color-accent-ink); }
.band--indigo .link:hover { border-color: var(--color-paper-3); }
.picked { display: grid; gap: var(--space-sm); }
.picked .contact { margin-top: 0; }

/* Hỏi đáp */
.faq-group + .faq-group { margin-top: var(--space-2xl); }
.faq-group h2 { font-size: 2rem; margin-bottom: var(--space-md); }
.faq { border-top: var(--rule-ink) solid var(--color-rule-ink); max-width: 52rem; }
.faq details { border-bottom: 1px solid var(--color-rule); }
.faq summary {
  list-style: none; display: flex; justify-content: space-between; align-items: center; gap: var(--space-lg);
  min-height: 56px; padding-block: var(--space-sm); cursor: pointer; font: 500 var(--text-title)/1.35 var(--font-body);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; flex: none; font: 400 1.5rem/1 var(--font-body); }
.faq details[open] summary::after { content: "\2212"; }
.faq .answer { padding-bottom: var(--space-lg); color: var(--color-ink-2); max-width: 42em; }
.faq .answer p + p { margin-top: var(--space-sm); }
.faq .answer a, .page-copy a { color: var(--color-ink); font-weight: 500; text-decoration: none; border-bottom: 2px solid currentColor; }
.faq .answer a:hover, .page-copy a:hover { border-color: var(--color-accent); }

/* Danh sách hướng dẫn */
.rows { list-style: none; margin: 0; padding: 0; border-top: var(--rule-ink) solid var(--color-rule-ink); }
.rows li { border-bottom: 1px solid var(--color-rule); }
.rows a { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: var(--space-sm) var(--space-xl); align-items: baseline; padding-block: var(--space-lg); color: inherit; text-decoration: none; }
.rows strong { font: var(--display-weight) 2rem/1.15 var(--font-display); letter-spacing: var(--tracking-display); text-decoration: underline; text-decoration-color: transparent; text-decoration-thickness: 2px; text-underline-offset: 6px; transition: text-decoration-color var(--dur-short) var(--ease-out); }
.rows a:hover strong { text-decoration-color: var(--color-accent); }
.rows span { color: var(--color-muted); }
@media (max-width: 700px) { .rows a { grid-template-columns: 1fr; } }

/* Khối nội dung hai cột dùng chung */
.split { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); gap: var(--space-xl) clamp(40px, 6vw, 96px); align-items: start; }
.split h2 { margin-bottom: var(--space-md); }
.page-copy { display: grid; gap: var(--space-sm); color: var(--color-ink-2); max-width: 40em; }
.stack { display: grid; gap: clamp(56px, 7vw, 96px); padding-bottom: clamp(64px, 8vw, var(--space-3xl)); }
.size-tables { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-xl) clamp(24px, 3vw, 40px); }
.size-tables h3 { margin-bottom: var(--space-md); }
@media (max-width: 900px) { .split, .size-tables { grid-template-columns: 1fr; } }

/* Footer nhiều cột */
.site-foot { border-top: var(--rule-ink) solid var(--color-rule-ink); padding-block: clamp(48px, 6vw, 72px) var(--space-2xl); }
.site-foot .wrap { display: block; }
.foot-cols { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-xl); }
.site-foot h2 { font: 500 var(--text-sm)/1.4 var(--font-body); letter-spacing: 0; color: var(--color-muted); margin-bottom: var(--space-sm); }
.site-foot .foot-cols ul { display: grid; gap: var(--space-sm); }
.site-foot a[aria-current="page"] { border-bottom-color: var(--color-ink); }
.foot-legal { margin-top: var(--space-xl); padding-top: var(--space-lg); border-top: 1px solid var(--color-rule); display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-md) var(--space-xl); }
@media (max-width: 760px) { .foot-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* Bảng chất liệu: xếp chồng trên điện thoại */
@media (max-width: 640px) {
  .prose table.care thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .prose table.care, .prose table.care tbody, .prose table.care tr { display: block; }
  .prose table.care tr { padding-block: var(--space-sm); border-bottom: 1px solid var(--color-rule); }
  .prose table.care tr:first-child { border-top: var(--rule-ink) solid var(--color-rule-ink); }
  .prose table.care th, .prose table.care td { display: grid; grid-template-columns: 6rem 1fr; gap: var(--space-md); border: 0; padding: var(--space-2xs) 0; }
  .prose table.care th { font: 500 var(--text-title)/1.35 var(--font-body); display: block; padding-bottom: var(--space-xs); }
  .prose table.care td::before { content: attr(data-label); font: 500 var(--text-sm)/1.5 var(--font-body); color: var(--color-muted); }
}

/* ===================================================================
   Nâng cấp: chữ, ô ảnh, chỗ giữ chỗ, nhịp trang
   =================================================================== */
:root { --display-weight: 500; --tracking-display: -0.015em; }
h1, h2 { font-weight: 500; }
.brand { font-weight: 500; letter-spacing: -0.01em; }
.lead { line-height: 1.55; }
.section--tight { padding-top: 0; }

/* Ô ảnh giữ chỗ: phẳng, nhãn nhỏ ở góc như số hình trong sách mẫu */
.photo-slot { position: relative; place-items: end start; padding: var(--space-sm) var(--space-md); text-align: left; color: var(--color-muted); font: 500 0.875rem/1.4 var(--font-body); }
.photo-slot::before { content: "Ảnh"; position: absolute; top: var(--space-sm); left: var(--space-md); font: 500 0.875rem/1.4 var(--font-body); color: var(--color-muted); letter-spacing: 0.02em; }
.photo-slot span { max-width: none; }
.thumb { padding: 6px 8px; font-size: 0.875rem; color: var(--color-muted); }

/* Chỗ giữ chỗ: xám, gạch chấm, để chữ thật nổi lên */
.ph { color: var(--color-muted); border-bottom: 1px dotted var(--color-muted); font-weight: inherit; }
.band--indigo .ph { color: var(--text-on-indigo-quiet); border-bottom-color: var(--text-on-indigo-quiet); }
.photo figcaption .ph, .crumbs .ph, .site-foot .ph { border-bottom: 0; }
h1 .ph, h2 .ph, .figure-price .ph, .compare .fig .ph, .spec .price .ph { border-bottom-width: 1px; border-bottom-style: dotted; }

/* Trang chủ */
.hero { padding-block: clamp(48px, 7vw, 112px) 0; }
.hero-text { gap: var(--space-xl); }
.hero h1 { font-size: clamp(3rem, 1.6rem + 5.4vw, 6rem); }
.nowrap { white-space: nowrap; }
@media (max-width: 420px) { .nowrap { white-space: normal; } }
.hero .photo { align-self: start; }
.spec.facts { max-width: none; }
.spec.facts dd { font-size: var(--text-base); font-weight: 400; }
.statement { padding-block: clamp(64px, 8vw, 112px); }
.statement .wrap { display: grid; gap: var(--space-2xl); }
.statement-line { font: 500 clamp(1.75rem, 1.2rem + 2vw, 2.75rem)/1.25 var(--font-display); letter-spacing: var(--tracking-display); max-width: 24em; text-wrap: balance; }
.spec.facts.three { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0 var(--space-xl); border-top: 0; }
.spec.facts.three > div { grid-template-columns: 1fr; gap: var(--space-2xs); border-top: var(--rule-ink) solid var(--color-rule-ink); border-bottom: 0; padding-top: var(--space-md); }
@media (max-width: 700px) { .spec.facts.three { grid-template-columns: 1fr; gap: var(--space-md); } }
.group-head { margin-bottom: clamp(24px, 3vw, 40px); }
.section-head .lead { max-width: 40em; }
.compare-actions { margin-top: var(--space-2xl); }

/* Thẻ mẫu: ảnh có khoảng thở, giá bằng chữ display nhỏ */
.card { gap: var(--space-2xs); }
.card .photo-slot { margin-bottom: var(--space-sm); }
.card .price { font: 500 1.375rem/1.2 var(--font-display); letter-spacing: var(--tracking-display); margin-top: var(--space-2xs); }

/* Hộp mua: hàng thông số gọn hơn */
.buybox .sku { letter-spacing: 0.01em; }
.spec.small > div { padding-block: 10px; }

/* Chân trang */
.foot-legal p + p { margin-top: var(--space-2xs); }

/* Thanh mua dính đáy màn hình điện thoại (trang mẫu) */
.buy-bar { display: none; }
@media (max-width: 900px) {
  .buy-bar { display: block; position: fixed; left: 0; right: 0; bottom: 0; z-index: 6; background: var(--color-paper); border-top: var(--rule-ink) solid var(--color-rule-ink); padding-bottom: env(safe-area-inset-bottom, 0px); transform: translateY(110%); transition: transform var(--dur-short) var(--ease-out); }
  .buy-bar.is-on { transform: none; }
  .buy-bar .wrap { display: flex; align-items: center; justify-content: space-between; gap: var(--space-md); min-height: 64px; }
  .buy-bar-price { font: 500 1.5rem/1.1 var(--font-display); letter-spacing: var(--tracking-display); }
  body.has-buy-bar { padding-bottom: 72px; }
}

/* ===================================================================
   Quy tắc chủ dự án: chữ chạm lề phải mới xuống dòng; điện thoại gọn
   =================================================================== */
h1, h2, h3, p, .lead, .statement-line, .card h3, .rows strong { text-wrap: initial; }
.hero h1, .buybox h1 { max-width: none; }
.hero-text .lead, .order-intro .lead, .section-head .lead, .cta-band p, .statement-line, .intro p { max-width: none; }
.lead { max-width: 44em; }
.page-copy, .body, .faq .answer, .prose, .note { max-width: 44em; }

@media (max-width: 700px) {
  :root { --text-h2: clamp(1.75rem, 1.4rem + 2vw, 2.25rem); }
  .hero { padding-block: 28px 0; }
  .hero-grid { gap: 24px; }
  .hero-text { gap: 20px; }
  .hero h1 { font-size: clamp(2.5rem, 1.5rem + 5vw, 3.25rem); }
  .section { padding-block: 40px; }
  .section--tight { padding-top: 0; }
  .section-head { margin-bottom: 20px; gap: 10px; }
  .group-head { margin-bottom: 16px; }
  .group + .group { margin-top: 40px; }
  .grid-cards { gap: 28px 16px; }
  .statement { padding-block: 40px; }
  .statement .wrap { gap: 28px; }
  .statement-line { font-size: 1.5rem; line-height: 1.3; }
  .spec.facts.three { gap: 12px; }
  .spec.facts.three > div { padding-top: 10px; }
  .spec > div { padding-block: 8px; gap: 10px; }
  .steps { gap: 16px; }
  .steps li { gap: 4px; padding-top: 12px; }
  .steps li::before { font-size: 1.75rem; }
  .steps h3 { margin-top: 4px; }
  .compare-actions { margin-top: 24px; }
  .cta-band { padding-block: 36px; }
  .cta-band .wrap { gap: 16px; }
  .cta-band p { margin-top: 8px; }
  .page-head { padding-block: 20px 24px; }
  .page-head .wrap { gap: 10px; }
  .crumbs { padding-top: 14px; }
  .stack { gap: 40px; padding-bottom: 48px; }
  .split { gap: 24px; }
  .pdp { gap: 24px; padding-bottom: 40px; }
  .pdp-more { gap: 32px; padding-bottom: 40px; }
  .buybox { gap: 20px; }
  .buy { gap: 16px; }
  .policy-head { padding-bottom: 20px; }
  .policy-grid { padding-bottom: 40px; }
  .prose section { padding-top: 28px; }
  .prose h2 { margin-bottom: 10px; }
  .faq-group + .faq-group { margin-top: 36px; }
  .band--indigo.section { padding-block: 40px; }
  .order-grid { gap: 32px; }
  .order-intro { gap: 16px; }
  .form { gap: 16px; }
  .row-2 { gap: 16px; }
  .measure-sheet { padding: 20px 16px; }
  .site-foot { padding-block: 32px 36px; }
  .foot-cols { gap: 24px 16px; }
  .site-foot .foot-cols ul { gap: 8px; }
  .foot-legal { margin-top: 24px; padding-top: 16px; }
  .photo-slot { aspect-ratio: 4 / 3; }
  .hero .photo-slot, .card .photo-slot, .gallery .photo-slot { aspect-ratio: 4 / 3; }
  .card .photo-slot { aspect-ratio: 4 / 5; }
}