/*
  theme.css — kientruccanhquan.vn (prototype)
  Chủ sở hữu: UI/Layout Designer. File DUY NHẤT chứa style component.
  Biến gốc :root dưới đây ĐỒNG BỘ TỪ 04-design/tokens.css (không lệch mã).
  Copy vào đây để prototype tự chứa khi mở file .html trực tiếp; nếu tokens.css
  đổi thì phải sync lại. Không style component trong tokens.css.
*/

/* =========================================================================
   0. BIẾN GỐC — đồng bộ từ 04-design/tokens.css
   ========================================================================= */
:root {
  /* Color — locked palette */
  --color-bg: #F5F4EF;
  --color-surface: #ECEAE2;
  --color-surface-white: #FFFFFF;
  --color-brand-forest: #1F3D2F;
  --color-brand-moss: #2F5C43;
  --color-accent: #BC6B43;
  --color-ink: #1A2420;
  --color-muted: #5A6B60;
  --color-line: rgba(31, 61, 47, 0.12);
  --color-line-strong: #1F3D2F;

  --color-accent-hover: color-mix(in srgb, var(--color-accent) 85%, var(--color-ink) 15%);
  --color-brand-forest-hover: color-mix(in srgb, var(--color-brand-forest) 90%, black 10%);
  --color-surface-hover: color-mix(in srgb, var(--color-surface) 92%, var(--color-brand-forest) 8%);

  /* Typography */
  --font-display: "Cormorant Garamond", Georgia, serif;
  --font-body: "Be Vietnam Pro", "Segoe UI", sans-serif;

  --fs-display: clamp(2.75rem, 2rem + 3vw, 4rem);
  --fs-h1: clamp(2.25rem, 1.8rem + 2vw, 3rem);
  --fs-h2: clamp(1.75rem, 1.5rem + 1vw, 2.25rem);
  --fs-h3: 1.5rem;
  --fs-h4: 1.25rem;
  --fs-h5: 1.125rem;
  --fs-h6: 0.875rem;
  --fs-body-lg: 1.125rem;
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --fs-caption: 0.8125rem;
  --fs-button: 1rem;
  --fs-button-on-accent: 1.1875rem;

  --lh-display: 1.08;
  --lh-h1: 1.12;
  --lh-h2: 1.2;
  --lh-heading: 1.3;
  --lh-body-lg: 1.75;
  --lh-body: 1.6;
  --lh-small: 1.5;

  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;

  /* Spacing */
  --space-0: 0;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 40px;
  --space-8: 48px;
  --space-9: 64px;
  --space-10: 80px;
  --space-11: 96px;
  --space-12: 128px;

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-pill: 999px;

  /* Shadow */
  --shadow-sm: 0 1px 2px rgba(31, 61, 47, 0.06), 0 1px 1px rgba(31, 61, 47, 0.04);
  --shadow-md: 0 4px 12px rgba(31, 61, 47, 0.10), 0 2px 4px rgba(31, 61, 47, 0.06);
  --shadow-lg: 0 12px 32px rgba(31, 61, 47, 0.14), 0 4px 8px rgba(31, 61, 47, 0.08);

  /* Container */
  --container-max: 1280px;
  --container-content: 1120px;
  --container-article: 65ch;
  --container-padding-inline: clamp(20px, 5vw, 64px);

  /* Motion */
  --dur-fast: 150ms;
  --dur-base: 240ms;
  --dur-slow: 420ms;
  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-organic: cubic-bezier(0.16, 1, 0.3, 1);
}

/* =========================================================================
   1. RESET / BASE
   ========================================================================= */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }
img { height: auto; }

a { color: var(--color-brand-moss); text-underline-offset: 3px; }

button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: none; }

ul, ol { padding: 0; list-style: none; }

h1, h2, h3, h4, h5, h6 { line-height: var(--lh-heading); font-weight: var(--fw-semibold); }

:focus-visible {
  outline: 2px solid var(--color-line-strong);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Skip link accessibility */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-brand-forest);
  color: #fff;
  padding: var(--space-3) var(--space-5);
  border-radius: 0 0 var(--radius-md) 0;
  z-index: 100;
}
.skip-link:focus { left: 0; }

/* =========================================================================
   2. LAYOUT PRIMITIVES
   ========================================================================= */
.container {
  width: 100%;
  max-width: var(--container-content);
  margin-inline: auto;
  padding-inline: var(--container-padding-inline);
}
.container--wide { max-width: var(--container-max); }
.container--article { max-width: var(--container-article); }

.section { padding-block: clamp(var(--space-9), 8vw, var(--space-12)); }
.section--tight { padding-block: clamp(var(--space-8), 6vw, var(--space-10)); }

.section-head { max-width: 52ch; margin-bottom: var(--space-8); }
.section-head--center { margin-inline: auto; text-align: center; }

/* =========================================================================
   3. TYPOGRAPHY HELPERS
   ========================================================================= */
.display { font-family: var(--font-display); font-weight: 600; font-size: var(--fs-display); line-height: var(--lh-display); letter-spacing: -0.01em; }
.h1 { font-family: var(--font-display); font-weight: 600; font-size: var(--fs-h1); line-height: var(--lh-h1); letter-spacing: -0.005em; }
.h2 { font-family: var(--font-display); font-weight: 500; font-size: var(--fs-h2); line-height: var(--lh-h2); }
.h3 { font-family: var(--font-body); font-weight: 600; font-size: var(--fs-h3); }
.h4 { font-family: var(--font-body); font-weight: 600; font-size: var(--fs-h4); }
.h5 { font-family: var(--font-body); font-weight: 600; font-size: var(--fs-h5); }

.eyebrow {
  font-family: var(--font-body);
  font-size: var(--fs-h6);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-brand-moss);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}
.eyebrow::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--color-accent);
  display: inline-block;
}
.eyebrow--on-dark { color: #E7DFD3; }
.eyebrow--on-dark::before { background: var(--color-accent); }

.lead { font-size: var(--fs-body-lg); line-height: 1.65; color: var(--color-muted); }
.muted { color: var(--color-muted); }

/* =========================================================================
   4. BUTTONS
   ========================================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--fs-button);
  line-height: 1.2;
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-6);
  text-decoration: none;
  transition: background-color var(--dur-base) var(--ease-standard),
              color var(--dur-base) var(--ease-standard),
              transform var(--dur-fast) var(--ease-standard),
              box-shadow var(--dur-base) var(--ease-standard);
  border: 1.5px solid transparent;
}
.btn:active { transform: translateY(1px); }

/* Primary: terracotta fill — nhãn BẮT BUỘC cỡ lớn (19px/700) để đạt WCAG */
.btn--primary {
  background: var(--color-accent);
  color: #fff;
  font-weight: 700;
  font-size: var(--fs-button-on-accent); /* 19px — đạt phân loại chữ lớn */
  padding: var(--space-4) var(--space-7);
}
.btn--primary:hover { background: var(--color-accent-hover); box-shadow: var(--shadow-md); }

/* Secondary: outline xanh rừng (10.79:1 an toàn) */
.btn--secondary {
  border-color: var(--color-brand-forest);
  color: var(--color-brand-forest);
  background: transparent;
}
.btn--secondary:hover { background: var(--color-brand-forest); color: #fff; }

/* Solid forest — CTA an toàn tuyệt đối (11.89:1) */
.btn--forest {
  background: var(--color-brand-forest);
  color: #fff;
}
.btn--forest:hover { background: var(--color-brand-forest-hover); box-shadow: var(--shadow-md); }

/* Ghost text-only */
.btn--ghost {
  color: var(--color-ink);
  padding-inline: var(--space-2);
}
.btn--ghost::after {
  content: "";
  display: inline-block;
  width: 0.5em; height: 0.5em;
  border-right: 1.5px solid currentColor;
  border-top: 1.5px solid currentColor;
  transform: rotate(45deg);
  margin-left: var(--space-1);
  transition: transform var(--dur-base) var(--ease-standard);
}
.btn--ghost:hover { color: var(--color-brand-forest); }
.btn--ghost:hover::after { transform: rotate(45deg) translate(2px, -2px); }

.btn--on-dark.btn--secondary { border-color: rgba(255,255,255,0.6); color: #fff; }
.btn--on-dark.btn--secondary:hover { background: #fff; color: var(--color-brand-forest); }
.btn--on-dark.btn--ghost { color: #fff; }

/* =========================================================================
   5. TAGS / PILLS / BADGES
   ========================================================================= */
.tag {
  display: inline-flex;
  align-items: center;
  font-size: var(--fs-caption);
  font-weight: 500;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  color: var(--color-ink);
  text-decoration: none;
  transition: background-color var(--dur-fast) var(--ease-standard);
}
a.tag:hover { background: var(--color-surface-hover); }

/* Tag nổi bật: viền terracotta 1.5px + chữ mực (terracotta chỉ làm viền — đạt) */
.tag--accent {
  background: transparent;
  border: 1.5px solid var(--color-accent);
  color: var(--color-ink);
}
.tag--on-dark { background: rgba(255,255,255,0.12); color: #fff; }

/* =========================================================================
   6. CARDS
   ========================================================================= */
.card {
  border-radius: var(--radius-md);
  border: 1px solid var(--color-line);
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur-base) var(--ease-organic),
              box-shadow var(--dur-base) var(--ease-organic);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.card--white { background: var(--color-surface-white); }
.card--stone { background: var(--color-surface); }
.card--link:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.card__body { padding: var(--space-6); display: flex; flex-direction: column; gap: var(--space-3); flex: 1; }
.card__title { font-family: var(--font-body); font-weight: 600; font-size: var(--fs-h5); color: var(--color-ink); line-height: 1.35; }
.card__title a { color: inherit; text-decoration: none; }
.card--link:hover .card__title a { color: var(--color-brand-forest); }
.card__excerpt { color: var(--color-muted); font-size: var(--fs-small); line-height: 1.6; }
.card__meta { font-size: var(--fs-caption); color: var(--color-muted); display: flex; gap: var(--space-2); align-items: center; flex-wrap: wrap; margin-top: auto; }
.card__meta .dot { width: 3px; height: 3px; border-radius: 50%; background: var(--color-muted); }

/* =========================================================================
   7. PLACEHOLDER "ẢNH MINH HOẠ" — trung thực, không giả ảnh chụp
   ========================================================================= */
.ph {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  border-radius: var(--radius-md);
  overflow: hidden;
  background:
    linear-gradient(140deg,
      color-mix(in srgb, var(--color-surface) 70%, var(--color-brand-moss) 30%) 0%,
      var(--color-surface) 45%,
      color-mix(in srgb, var(--color-bg) 60%, var(--color-brand-forest) 8%) 100%);
  border: 1px solid var(--color-line);
  min-height: 220px;
  color: var(--color-ink);
  isolation: isolate;
}
.ph--lg { min-height: 340px; }
.ph--tall { min-height: 460px; }
.ph--forest {
  background:
    linear-gradient(150deg,
      var(--color-brand-forest) 0%,
      color-mix(in srgb, var(--color-brand-forest) 80%, var(--color-brand-moss) 20%) 60%,
      color-mix(in srgb, var(--color-brand-forest) 70%, #000 12%) 100%);
  color: #fff;
  border-color: rgba(255,255,255,0.12);
}
/* botanical SVG overlay đặt qua ::before (hình học, KHÔNG giả ảnh) */
.ph__deco {
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.5;
  pointer-events: none;
}
.ph__tag {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  font-size: var(--fs-caption);
  font-weight: 500;
  background: rgba(255,255,255,0.82);
  color: var(--color-ink);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  backdrop-filter: blur(2px);
  z-index: 2;
}
.ph--forest .ph__tag { background: rgba(0,0,0,0.35); color: #fff; }
.ph__caption {
  position: relative;
  z-index: 2;
  padding: var(--space-4) var(--space-5);
  font-size: var(--fs-caption);
  line-height: 1.4;
  background: linear-gradient(to top, rgba(26,36,32,0.55), transparent);
  color: #fff;
}
.ph--plain .ph__caption { background: none; color: var(--color-muted); }

/* =========================================================================
   8. HEADER / NAV (dùng chung 5 trang)
   ========================================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-line);
  transition: box-shadow var(--dur-base) var(--ease-standard), background-color var(--dur-base) var(--ease-standard);
}
.site-header.is-scrolled { box-shadow: var(--shadow-md); background: color-mix(in srgb, var(--color-bg) 96%, transparent); }
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  height: 72px;
}
.brand { display: inline-flex; flex-direction: column; text-decoration: none; line-height: 1; }
.brand__mark { font-family: var(--font-display); font-weight: 600; font-size: 1.5rem; color: var(--color-brand-forest); letter-spacing: 0.01em; }
.brand__sub { font-size: 0.625rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--color-muted); margin-top: 3px; }

.nav__menu { display: none; }
.nav__links { display: flex; align-items: center; gap: var(--space-6); }
.nav__link {
  position: relative;
  color: var(--color-ink);
  text-decoration: none;
  font-size: var(--fs-small);
  font-weight: 500;
  padding-block: var(--space-2);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 100%; height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-base) var(--ease-standard);
}
.nav__link:hover::after, .nav__link[aria-current="page"]::after { transform: scaleX(1); }
.nav__link[aria-current="page"] { color: var(--color-brand-forest); font-weight: 600; }

.nav__actions { display: flex; align-items: center; gap: var(--space-3); }

.nav__toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px; height: 44px;
  padding: 10px;
  border-radius: var(--radius-sm);
}
.nav__toggle span { display: block; height: 2px; width: 100%; background: var(--color-ink); border-radius: 2px; transition: transform var(--dur-base) var(--ease-standard), opacity var(--dur-fast) linear; }

@media (min-width: 1024px) {
  .nav__menu { display: flex; align-items: center; gap: var(--space-7); }
  .nav__toggle { display: none; }
}

/* Mobile drawer — nền forest, chữ trắng (11.89:1) */
.nav__drawer {
  position: fixed;
  inset: 0;
  background: var(--color-brand-forest);
  color: #fff;
  z-index: 60;
  display: flex;
  flex-direction: column;
  padding: var(--space-6) var(--container-padding-inline);
  transform: translateX(100%);
  transition: transform var(--dur-slow) var(--ease-organic);
  visibility: hidden;
}
.nav__drawer.is-open { transform: translateX(0); visibility: visible; }
.nav__drawer-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--space-8); }
.nav__drawer .brand__mark { color: #fff; }
.nav__drawer .brand__sub { color: #C9D3CB; }
.nav__drawer-close { width: 44px; height: 44px; color: #fff; font-size: 1.6rem; line-height: 1; }
.nav__drawer-links { display: flex; flex-direction: column; gap: var(--space-2); }
.nav__drawer-links a {
  color: #fff;
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 500;
  padding-block: var(--space-3);
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
.nav__drawer-links a[aria-current="page"] { color: #E7DFD3; }
.nav__drawer .btn { margin-top: var(--space-7); }
body.no-scroll { overflow: hidden; }

/* =========================================================================
   9. FOOTER (dùng chung)
   ========================================================================= */
.site-footer { background: var(--color-brand-forest); color: #fff; padding-block: var(--space-10) var(--space-7); margin-top: var(--space-6); }
.footer-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-8); }
.footer-brand .brand__mark { color: #fff; }
.footer-brand .brand__sub { color: #C9D3CB; }
.footer-brand p { color: #C9D3CB; margin-top: var(--space-4); max-width: 42ch; font-size: var(--fs-small); line-height: 1.6; }
.footer-col h3 { font-size: var(--fs-h6); text-transform: uppercase; letter-spacing: 0.1em; color: #A9B8AD; margin-bottom: var(--space-4); font-weight: 600; }
.footer-col ul { display: flex; flex-direction: column; gap: var(--space-3); }
.footer-col a { color: #E7EBE6; text-decoration: none; font-size: var(--fs-small); transition: color var(--dur-fast) var(--ease-standard); }
.footer-col a:hover { color: #fff; text-decoration: underline; }
.footer-note { color: #A9B8AD; font-size: var(--fs-small); line-height: 1.6; }
.footer-bottom { margin-top: var(--space-9); padding-top: var(--space-6); border-top: 1px solid rgba(255,255,255,0.14); display: flex; flex-direction: column; gap: var(--space-3); color: #A9B8AD; font-size: var(--fs-caption); }
@media (min-width: 768px) {
  .footer-grid { grid-template-columns: 1.6fr 1fr 1fr; gap: var(--space-9); }
  .footer-bottom { flex-direction: row; justify-content: space-between; align-items: center; }
}

/* =========================================================================
   10. BREADCRUMB
   ========================================================================= */
.breadcrumb { font-size: var(--fs-small); color: var(--color-muted); padding-block: var(--space-5); }
.breadcrumb ol { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); }
.breadcrumb a { color: var(--color-muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--color-brand-forest); text-decoration: underline; }
.breadcrumb li:not(:last-child)::after { content: "›"; margin-left: var(--space-2); color: var(--color-muted); }
.breadcrumb [aria-current="page"] { color: var(--color-ink); }

/* =========================================================================
   11. FORM
   ========================================================================= */
.field { display: flex; flex-direction: column; gap: var(--space-2); margin-bottom: var(--space-5); }
.field label { font-size: var(--fs-small); font-weight: 600; color: var(--color-ink); }
.field input, .field textarea, .field select {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-4);
  font-size: var(--fs-body);
  transition: border-color var(--dur-fast) var(--ease-standard), box-shadow var(--dur-fast) var(--ease-standard);
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-color: var(--color-line-strong);
  box-shadow: 0 0 0 3px rgba(47,92,67,0.25);
}
.field textarea { resize: vertical; min-height: 120px; }
.field .helper { font-size: var(--fs-caption); color: var(--color-muted); }

/* =========================================================================
   12. AUTHOR BOX (E-E-A-T)
   ========================================================================= */
.author-box { background: var(--color-surface-white); border: 1px solid var(--color-line); border-radius: var(--radius-lg); padding: var(--space-6); display: flex; gap: var(--space-5); box-shadow: var(--shadow-sm); }
.author-box__avatar {
  flex-shrink: 0;
  width: 72px; height: 72px;
  border-radius: var(--radius-pill);
  background: linear-gradient(140deg, var(--color-brand-moss), var(--color-brand-forest));
  display: grid; place-items: center;
  color: #fff; font-family: var(--font-display); font-size: 1.75rem; font-weight: 600;
  position: relative;
}
.author-box__avatar span.ph-note { position: absolute; bottom: -18px; left: 50%; transform: translateX(-50%); white-space: nowrap; font-family: var(--font-body); font-size: 0.625rem; font-weight: 400; color: var(--color-muted); }
.author-box__name { font-size: var(--fs-h5); font-weight: 600; color: var(--color-ink); }
.author-box__role { font-size: var(--fs-small); color: var(--color-muted); margin-top: 2px; }
.author-box__bio { font-size: var(--fs-body); color: var(--color-ink); margin-top: var(--space-3); line-height: 1.6; }
.author-box__links { margin-top: var(--space-3); display: flex; gap: var(--space-4); }
.author-box__links a { font-size: var(--fs-small); color: var(--color-brand-moss); }

/* =========================================================================
   13. SCROLL-REVEAL (JS thêm .is-in)
   ========================================================================= */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity var(--dur-slow) var(--ease-organic), transform var(--dur-slow) var(--ease-organic); }
.reveal.is-in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 80ms; }
.reveal[data-delay="2"] { transition-delay: 160ms; }
.reveal[data-delay="3"] { transition-delay: 240ms; }

/* =========================================================================
   14. UTIL
   ========================================================================= */
.grid { display: grid; gap: var(--space-6); }
.flow > * + * { margin-top: var(--space-4); }
.divider { height: 1px; background: var(--color-line); border: 0; }
.text-center { text-align: center; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

/* =========================================================================
   16. HERO (trang chủ) — split bất đối xứng, KHÔNG căn giữa hết
   ========================================================================= */
.hero { min-height: 100dvh; display: flex; align-items: center; padding-block: var(--space-9); position: relative; overflow: hidden; }
.hero__grid { display: grid; grid-template-columns: 1fr; gap: var(--space-8); align-items: center; width: 100%; }
.hero__content { max-width: 34ch; }
.hero__title { font-family: var(--font-display); font-weight: 600; font-size: var(--fs-display); line-height: var(--lh-display); letter-spacing: -0.01em; color: var(--color-ink); }
.hero__title em { font-style: italic; color: var(--color-brand-forest); }
.hero__sub { margin-top: var(--space-5); font-size: var(--fs-body-lg); color: var(--color-muted); line-height: 1.6; }
.hero__cta { margin-top: var(--space-7); display: flex; flex-wrap: wrap; gap: var(--space-4); align-items: center; }
.hero__visual { position: relative; }
.hero__visual .ph { min-height: 380px; }
.hero__badge {
  position: absolute; bottom: var(--space-5); right: calc(-1 * var(--space-4));
  background: var(--color-surface-white); border: 1px solid var(--color-line);
  border-radius: var(--radius-md); box-shadow: var(--shadow-lg);
  padding: var(--space-4) var(--space-5); max-width: 220px; z-index: 3;
}
.hero__badge strong { font-family: var(--font-display); font-size: var(--fs-h3); color: var(--color-brand-forest); display: block; }
.hero__badge span { font-size: var(--fs-caption); color: var(--color-muted); }
@media (min-width: 1024px) {
  .hero__grid { grid-template-columns: 1.05fr 1.2fr; gap: var(--space-10); }
  .hero__visual .ph { min-height: 560px; }
  .hero__title { font-size: clamp(3rem, 2rem + 3.4vw, 4.25rem); }
}

/* =========================================================================
   17. INTRO STRIP — 2 cột text
   ========================================================================= */
.intro-strip { display: grid; grid-template-columns: 1fr; gap: var(--space-7); align-items: start; }
.intro-strip__lead { font-family: var(--font-display); font-size: var(--fs-h2); font-weight: 500; line-height: 1.3; color: var(--color-ink); }
.intro-strip__body { color: var(--color-muted); font-size: var(--fs-body-lg); line-height: 1.7; }
.intro-strip__body p + p { margin-top: var(--space-4); }
@media (min-width: 900px) { .intro-strip { grid-template-columns: 1.1fr 1fr; gap: var(--space-10); } }

/* =========================================================================
   18. BENTO "Ý tưởng thiết kế" — lưới bất đối xứng, ô lớn ô nhỏ
   ========================================================================= */
.bento { display: grid; grid-template-columns: 1fr; gap: var(--space-4); }
.bento__cell { position: relative; border-radius: var(--radius-lg); overflow: hidden; min-height: 240px; display: flex; }
.bento__cell .ph { flex: 1; border-radius: 0; border: 0; min-height: 240px; }
.bento__label { position: absolute; left: var(--space-5); bottom: var(--space-5); z-index: 3; color: #fff; max-width: 26ch; }
.bento__label h3 { font-family: var(--font-display); font-weight: 600; font-size: var(--fs-h3); }
.bento__label p { font-size: var(--fs-small); color: rgba(255,255,255,0.9); margin-top: var(--space-1); }
.bento__cell::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(26,36,32,0.7) 8%, rgba(26,36,32,0.05) 55%); z-index: 2; transition: opacity var(--dur-base) var(--ease-standard); }
.bento__cell:hover .ph { transform: scale(1.03); }
.bento__cell .ph { transition: transform var(--dur-slow) var(--ease-organic); }
@media (min-width: 768px) {
  .bento { grid-template-columns: repeat(6, 1fr); grid-auto-rows: 180px; gap: var(--space-4); }
  .bento__cell { min-height: 0; }
  .bento__cell .ph { min-height: 0; }
  .cell-a { grid-column: span 4; grid-row: span 2; }
  .cell-b { grid-column: span 2; grid-row: span 1; }
  .cell-c { grid-column: span 2; grid-row: span 1; }
  .cell-d { grid-column: span 3; grid-row: span 1; }
  .cell-e { grid-column: span 3; grid-row: span 1; }
}

/* =========================================================================
   19. PHILOSOPHY — full-width forest (khoảnh khắc zen có chủ đích)
   ========================================================================= */
.philosophy { background: var(--color-brand-forest); color: #fff; position: relative; overflow: hidden; }
.philosophy__inner { display: grid; grid-template-columns: 1fr; gap: var(--space-7); align-items: center; position: relative; z-index: 2; }
.philosophy__quote { font-family: var(--font-display); font-weight: 500; font-size: clamp(1.75rem, 1.2rem + 2.4vw, 2.75rem); line-height: 1.28; letter-spacing: -0.005em; }
.philosophy__quote em { font-style: italic; color: #E7DFD3; }
.philosophy__body { color: #C9D3CB; font-size: var(--fs-body-lg); line-height: 1.7; max-width: 44ch; }
.philosophy__deco { position: absolute; inset: 0; opacity: 0.14; z-index: 1; pointer-events: none; }
@media (min-width: 900px) { .philosophy__inner { grid-template-columns: 1.4fr 1fr; gap: var(--space-10); } }

/* =========================================================================
   20. PROCESS — timeline số thứ tự (không phải 4 card giống hệt)
   ========================================================================= */
.process { display: grid; grid-template-columns: 1fr; gap: var(--space-6); counter-reset: step; }
.process__step { position: relative; padding-left: var(--space-9); padding-block: var(--space-4); }
.process__step::before { counter-increment: step; content: counter(step, decimal-leading-zero); position: absolute; left: 0; top: var(--space-4); font-family: var(--font-display); font-size: var(--fs-h2); font-weight: 600; color: var(--color-accent); line-height: 1; }
.process__step::after { content: ""; position: absolute; left: 22px; top: 56px; bottom: -22px; width: 1px; background: var(--color-line); }
.process__step:last-child::after { display: none; }
.process__step h3 { font-size: var(--fs-h4); color: var(--color-ink); margin-bottom: var(--space-2); }
.process__step p { color: var(--color-muted); font-size: var(--fs-small); line-height: 1.6; max-width: 46ch; }
@media (min-width: 768px) {
  .process { grid-template-columns: repeat(2, 1fr); gap: var(--space-8) var(--space-9); }
  .process__step::after { display: none; }
}

/* =========================================================================
   21. TEASER KIẾN THỨC — hàng bài editorial
   ========================================================================= */
.posts-row { display: grid; grid-template-columns: 1fr; gap: var(--space-6); }
@media (min-width: 640px) { .posts-row { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .posts-row { grid-template-columns: repeat(3, 1fr); } }
.posts-row--4 { }
@media (min-width: 1024px) { .posts-row--4 { grid-template-columns: repeat(4, 1fr); } }

/* =========================================================================
   22. BRIDGE 3A SIGNATURE — panel cầu nối authority
   ========================================================================= */
.bridge { background: var(--color-surface); border: 1px solid var(--color-line); border-radius: var(--radius-lg); padding: clamp(var(--space-7), 5vw, var(--space-10)); display: grid; grid-template-columns: 1fr; gap: var(--space-6); align-items: center; }
.bridge__eyebrow { color: var(--color-brand-moss); }
.bridge h2 { color: var(--color-ink); }
.bridge p { color: var(--color-muted); font-size: var(--fs-body-lg); line-height: 1.65; max-width: 52ch; }
.bridge__side { display: flex; flex-direction: column; gap: var(--space-4); }
@media (min-width: 900px) { .bridge { grid-template-columns: 1.5fr 1fr; gap: var(--space-9); } }

/* =========================================================================
   23. PAGE HEADER (trang trong) + featured
   ========================================================================= */
.page-header { padding-block: var(--space-8) var(--space-6); }
.page-header h1 { color: var(--color-ink); }
.page-header p { color: var(--color-muted); font-size: var(--fs-body-lg); max-width: 60ch; margin-top: var(--space-4); line-height: 1.6; }

.featured { display: grid; grid-template-columns: 1fr; gap: 0; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--color-line); background: var(--color-surface-white); box-shadow: var(--shadow-sm); transition: box-shadow var(--dur-base) var(--ease-organic); }
.featured:hover { box-shadow: var(--shadow-md); }
.featured .ph { border-radius: 0; border: 0; min-height: 280px; }
.featured__body { padding: clamp(var(--space-6), 4vw, var(--space-8)); display: flex; flex-direction: column; gap: var(--space-4); justify-content: center; }
.featured__body h2 { font-family: var(--font-display); font-size: var(--fs-h2); font-weight: 500; color: var(--color-ink); }
.featured__body h2 a { color: inherit; text-decoration: none; }
.featured:hover .featured__body h2 a { color: var(--color-brand-forest); }
.featured__excerpt { color: var(--color-muted); font-size: var(--fs-body); line-height: 1.65; max-width: 52ch; }
@media (min-width: 900px) { .featured { grid-template-columns: 1.1fr 1fr; } .featured .ph { min-height: 100%; } }

/* =========================================================================
   24. BLOG LAYOUT (chuyen-muc) — content + sidebar
   ========================================================================= */
.blog-layout { display: grid; grid-template-columns: 1fr; gap: var(--space-9); }
@media (min-width: 1024px) { .blog-layout { grid-template-columns: 1fr 300px; gap: var(--space-10); } }
.sidebar { display: flex; flex-direction: column; gap: var(--space-7); }
.widget { background: var(--color-surface-white); border: 1px solid var(--color-line); border-radius: var(--radius-md); padding: var(--space-6); }
.widget h3 { font-size: var(--fs-h5); color: var(--color-ink); margin-bottom: var(--space-4); }
.widget__list { display: flex; flex-direction: column; }
.widget__list li { border-bottom: 1px solid var(--color-line); }
.widget__list li:last-child { border-bottom: 0; }
.widget__list a { display: flex; justify-content: space-between; gap: var(--space-3); padding-block: var(--space-3); color: var(--color-ink); text-decoration: none; font-size: var(--fs-small); }
.widget__list a:hover { color: var(--color-brand-forest); }
.widget__list a .count { color: var(--color-muted); font-size: var(--fs-caption); }
.widget__mini { display: flex; gap: var(--space-3); padding-block: var(--space-3); border-bottom: 1px solid var(--color-line); }
.widget__mini:last-child { border-bottom: 0; }
.widget__mini .ph { width: 64px; height: 64px; min-height: 64px; flex-shrink: 0; border-radius: var(--radius-sm); }
.widget__mini a { color: var(--color-ink); text-decoration: none; font-size: var(--fs-small); font-weight: 500; line-height: 1.4; }
.widget__mini a:hover { color: var(--color-brand-forest); }
.widget__mini .m-date { font-size: var(--fs-caption); color: var(--color-muted); }

.pagination { display: flex; gap: var(--space-2); align-items: center; justify-content: center; margin-top: var(--space-9); }
.pagination a, .pagination span { min-width: 44px; height: 44px; display: inline-flex; align-items: center; justify-content: center; border-radius: var(--radius-sm); border: 1px solid var(--color-line); text-decoration: none; color: var(--color-ink); font-size: var(--fs-small); font-weight: 500; }
.pagination a:hover { background: var(--color-surface); }
.pagination [aria-current="page"] { background: var(--color-brand-forest); color: #fff; border-color: var(--color-brand-forest); }

/* =========================================================================
   25. ARTICLE (bai-viet) — khổ đọc 65ch, TOC, prose
   ========================================================================= */
.article-hero { padding-block: var(--space-6) var(--space-7); }
.article-meta { display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-4); align-items: center; color: var(--color-muted); font-size: var(--fs-small); margin-top: var(--space-5); }
.article-meta .dot { width: 3px; height: 3px; border-radius: 50%; background: var(--color-muted); }
.article-cover .ph { min-height: 300px; border-radius: var(--radius-lg); }
@media (min-width: 768px) { .article-cover .ph { min-height: 420px; } }

.article-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-8); }
@media (min-width: 1024px) { .article-grid { grid-template-columns: 240px minmax(0, 1fr); gap: var(--space-10); align-items: start; } }

.toc { border: 1px solid var(--color-line); border-radius: var(--radius-md); padding: var(--space-5); background: var(--color-surface-white); }
@media (min-width: 1024px) { .toc { position: sticky; top: 96px; } }
.toc h2 { font-size: var(--fs-h6); text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-muted); margin-bottom: var(--space-4); font-weight: 600; }
.toc ol { display: flex; flex-direction: column; gap: var(--space-1); counter-reset: toc; }
.toc a { display: block; padding: var(--space-2) var(--space-3); border-left: 2px solid transparent; color: var(--color-muted); text-decoration: none; font-size: var(--fs-small); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; transition: color var(--dur-fast) var(--ease-standard), border-color var(--dur-fast) var(--ease-standard), background-color var(--dur-fast) var(--ease-standard); }
.toc a:hover { color: var(--color-ink); background: var(--color-surface); }
.toc a.is-active { color: var(--color-brand-forest); border-left-color: var(--color-accent); font-weight: 600; }

.prose { max-width: var(--container-article); font-size: var(--fs-body-lg); line-height: var(--lh-body-lg); color: var(--color-ink); }
.prose > * + * { margin-top: var(--space-5); }
.prose h2 { font-family: var(--font-body); font-size: var(--fs-h3); color: var(--color-ink); margin-top: var(--space-8); scroll-margin-top: 96px; }
.prose h3 { font-family: var(--font-body); font-size: var(--fs-h4); color: var(--color-ink); margin-top: var(--space-6); scroll-margin-top: 96px; }
.prose p { color: var(--color-ink); }
.prose ul { list-style: disc; padding-left: 1.4em; }
.prose ul li + li { margin-top: var(--space-2); }
.prose a.inline-link { color: var(--color-brand-moss); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; text-decoration-color: currentColor; font-weight: 500; transition: color var(--dur-fast) var(--ease-standard); }
.prose a.inline-link:hover { color: var(--color-brand-forest); }
.prose a.inline-link--ext::after { content: ""; display: inline-block; width: 0.6em; height: 0.6em; margin-left: 0.25em; background: var(--color-accent); -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M14 3h7v7M21 3l-9 9M19 14v5a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V7a2 2 0 0 1 2-2h5' fill='none' stroke='black' stroke-width='2'/%3E%3C/svg%3E") center/contain no-repeat; mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M14 3h7v7M21 3l-9 9M19 14v5a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V7a2 2 0 0 1 2-2h5' fill='none' stroke='black' stroke-width='2'/%3E%3C/svg%3E") center/contain no-repeat; }
.prose blockquote { border-left: 4px solid var(--color-accent); padding-left: var(--space-5); margin-block: var(--space-7); }
.prose blockquote p { font-family: var(--font-display); font-style: italic; font-weight: 500; font-size: var(--fs-h2); line-height: 1.35; color: var(--color-ink); }
.prose figure .ph { border-radius: var(--radius-md); }
.prose figcaption { font-size: var(--fs-caption); color: var(--color-muted); margin-top: var(--space-2); }

.callout { background: var(--color-surface); border: 1px solid var(--color-line); border-left: 4px solid var(--color-brand-moss); border-radius: var(--radius-md); padding: var(--space-5) var(--space-6); }
.callout p { font-size: var(--fs-body); }

/* =========================================================================
   26. PORTFOLIO (thu-vien) — filter + bento nhịp
   ========================================================================= */
.filter-bar { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-bottom: var(--space-8); }
.filter-bar button { border: 1px solid var(--color-line); background: var(--color-surface-white); border-radius: var(--radius-pill); padding: var(--space-2) var(--space-5); font-size: var(--fs-small); font-weight: 500; color: var(--color-ink); transition: all var(--dur-fast) var(--ease-standard); }
.filter-bar button:hover { border-color: var(--color-brand-forest); }
.filter-bar button[aria-pressed="true"] { background: var(--color-brand-forest); color: #fff; border-color: var(--color-brand-forest); }

.portfolio-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-4); }
@media (min-width: 900px) { .portfolio-grid { grid-template-columns: repeat(4, 1fr); grid-auto-rows: 200px; } }
.portfolio-item { grid-column: span 2; border-radius: var(--radius-md); overflow: hidden; position: relative; display: flex; }
.portfolio-item .ph { flex: 1; border-radius: 0; border: 0; min-height: 220px; }
@media (min-width: 900px) {
  .portfolio-item { grid-column: span 2; grid-row: span 1; }
  .portfolio-item .ph { min-height: 0; }
  .portfolio-item.is-wide { grid-column: span 2; grid-row: span 2; }
  .portfolio-item.is-tall { grid-row: span 2; }
}

/* =========================================================================
   27. ABOUT (gioi-thieu) — story + values + contact
   ========================================================================= */
.value-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-5); }
@media (min-width: 700px) { .value-grid { grid-template-columns: repeat(3, 1fr); } }
.value-card { background: var(--color-surface-white); border: 1px solid var(--color-line); border-radius: var(--radius-md); padding: var(--space-6); box-shadow: var(--shadow-sm); }
.value-card .num { font-family: var(--font-display); font-size: var(--fs-h2); color: var(--color-accent); line-height: 1; }
.value-card h3 { font-size: var(--fs-h5); margin-block: var(--space-3) var(--space-2); color: var(--color-ink); }
.value-card p { color: var(--color-muted); font-size: var(--fs-small); line-height: 1.6; }

.story-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-8); align-items: center; }
@media (min-width: 900px) { .story-grid { grid-template-columns: 1fr 1.1fr; gap: var(--space-10); } }
.story-grid--rev { }
@media (min-width: 900px) { .story-grid--rev .story-grid__media { order: -1; } }

.contact-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-8); }
@media (min-width: 900px) { .contact-grid { grid-template-columns: 1fr 1.2fr; gap: var(--space-10); } }
.contact-list { display: flex; flex-direction: column; gap: var(--space-5); }
.contact-list dt { font-size: var(--fs-h6); text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-muted); font-weight: 600; }
.contact-list dd { font-size: var(--fs-body-lg); color: var(--color-ink); margin-top: var(--space-1); }
.contact-list .pending { color: var(--color-muted); font-style: italic; font-size: var(--fs-body); }

/* =========================================================================
   28. RELATED / CTA blocks
   ========================================================================= */
.cta-panel { background: var(--color-brand-forest); color: #fff; border-radius: var(--radius-lg); padding: clamp(var(--space-7), 5vw, var(--space-10)); text-align: center; display: flex; flex-direction: column; align-items: center; gap: var(--space-5); }
.cta-panel h2 { color: #fff; max-width: 24ch; }
.cta-panel p { color: #C9D3CB; max-width: 46ch; font-size: var(--fs-body-lg); }

/* =========================================================================
   29. [THÊM ĐỢT 2 — 6 trang mới] Component MỚI, KHÔNG sửa style đã duyệt ở trên.
       Chỉ dùng biến gốc + tone đã khóa (forest/limestone/terracotta).
       Terracotta chỉ làm viền/mũi tên/số trang trí — không làm màu chữ body.
   ========================================================================= */

/* 29.1 Đoạn định nghĩa mở đầu answer-ready (AEO) — đặt ngay dưới H1 pillar/bài */
.answer-lead {
  font-size: var(--fs-body-lg);
  line-height: 1.7;
  color: var(--color-ink);
  max-width: 64ch;
  border-left: 3px solid var(--color-accent); /* terracotta chỉ làm viền trang trí */
  padding-left: var(--space-5);
}

/* 29.2 Lưới chủ đề con của pillar */
.topic-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-5); }
@media (min-width: 700px) { .topic-grid { grid-template-columns: repeat(2, 1fr); } }
.topic-card {
  background: var(--color-surface-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  display: flex; flex-direction: column; gap: var(--space-3);
  transition: transform var(--dur-base) var(--ease-organic), box-shadow var(--dur-base) var(--ease-organic);
}
.topic-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.topic-card h2 { font-family: var(--font-display); font-weight: 500; font-size: var(--fs-h3); color: var(--color-ink); }
.topic-card p { color: var(--color-muted); font-size: var(--fs-small); line-height: 1.6; }
.topic-card .topic-card__more { font-size: var(--fs-small); color: var(--color-brand-moss); text-decoration: none; margin-top: auto; font-weight: 500; }
.topic-card .topic-card__more:hover { color: var(--color-brand-forest); text-decoration: underline; }

/* 29.3 FAQ ACCORDION — <details>/<summary> chạy được KHÔNG cần JS.
        JS chỉ nâng cấp: mở 1 câu thì tự đóng câu khác. AEO: Q = summary, A tự chứa. */
.faq { display: flex; flex-direction: column; gap: var(--space-3); max-width: 70ch; }
.faq__item {
  background: var(--color-surface-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow var(--dur-base) var(--ease-standard);
}
.faq__item[open] { box-shadow: var(--shadow-sm); }
.faq__q {
  list-style: none; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center; gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  font-family: var(--font-body); font-weight: 600; font-size: var(--fs-h5);
  color: var(--color-ink);
}
.faq__q::-webkit-details-marker { display: none; }
.faq__q:hover { color: var(--color-brand-forest); }
.faq__q::after {
  content: ""; flex-shrink: 0;
  width: 11px; height: 11px;
  border-right: 2px solid var(--color-accent); /* mũi tên terracotta — trang trí */
  border-bottom: 2px solid var(--color-accent);
  transform: rotate(45deg); margin-top: -4px;
  transition: transform var(--dur-base) var(--ease-standard);
}
.faq__item[open] .faq__q::after { transform: rotate(-135deg); margin-top: 4px; }
.faq__a { padding: 0 var(--space-6) var(--space-5); color: var(--color-ink); font-size: var(--fs-body); line-height: 1.65; max-width: 64ch; }
.faq__a p + p { margin-top: var(--space-3); }

/* 29.4 HEADER HỒ SƠ TÁC GIẢ (E-E-A-T) */
.author-profile {
  display: grid; grid-template-columns: 1fr; gap: var(--space-6); align-items: center;
  background: var(--color-surface-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: clamp(var(--space-6), 4vw, var(--space-9));
  box-shadow: var(--shadow-sm);
}
@media (min-width: 700px) { .author-profile { grid-template-columns: auto 1fr; gap: var(--space-8); align-items: start; } }
.author-profile__avatar {
  width: 120px; height: 120px; flex-shrink: 0;
  border-radius: var(--radius-pill);
  background: linear-gradient(140deg, var(--color-brand-moss), var(--color-brand-forest));
  display: grid; place-items: center;
  color: #fff; font-family: var(--font-display); font-size: 2.5rem; font-weight: 600;
  position: relative;
}
.author-profile__avatar .ph-note {
  position: absolute; bottom: -20px; left: 50%; transform: translateX(-50%);
  white-space: nowrap; font-family: var(--font-body); font-size: 0.625rem; font-weight: 400; color: var(--color-muted);
}
.author-profile__name { font-family: var(--font-display); font-weight: 600; font-size: var(--fs-h1); color: var(--color-ink); line-height: 1.12; }
.author-profile__role { font-size: var(--fs-body-lg); color: var(--color-brand-moss); margin-top: var(--space-2); font-weight: 500; }
.author-profile__bio { color: var(--color-ink); margin-top: var(--space-4); line-height: 1.7; max-width: 60ch; }
.author-profile__social { margin-top: var(--space-5); display: flex; flex-wrap: wrap; gap: var(--space-4); }
.author-profile__social a { font-size: var(--fs-small); color: var(--color-brand-moss); }
.author-profile__social .pending { font-size: var(--fs-small); color: var(--color-muted); font-style: italic; }

/* 29.5 KHỐI LIÊN HỆ (GEO) — bản đồ placeholder (KHÔNG nhúng Google Maps ngoài) */
.map-ph {
  position: relative; min-height: 320px;
  border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--color-line);
  background: linear-gradient(150deg, color-mix(in srgb, var(--color-surface) 58%, var(--color-brand-moss) 42%), var(--color-surface) 72%);
  display: grid; place-items: center; text-align: center;
}
.map-ph__deco { position: absolute; inset: 0; z-index: 0; opacity: 0.4; pointer-events: none; }
.map-ph__label {
  position: relative; z-index: 1;
  background: rgba(255,255,255,0.86); color: var(--color-ink);
  padding: var(--space-3) var(--space-5); border-radius: var(--radius-pill);
  font-size: var(--fs-small); font-weight: 500;
}
.area-list { display: flex; flex-wrap: wrap; gap: var(--space-3); }
.area-chip {
  background: var(--color-surface); border: 1px solid var(--color-line);
  border-radius: var(--radius-pill); padding: var(--space-2) var(--space-4);
  font-size: var(--fs-small); color: var(--color-ink);
}
.area-chip.pending { color: var(--color-muted); font-style: italic; }
.hours-list { display: flex; flex-direction: column; max-width: 42ch; }
.hours-list div { display: flex; justify-content: space-between; gap: var(--space-4); padding-block: var(--space-3); border-bottom: 1px solid var(--color-line); font-size: var(--fs-small); }
.hours-list div:last-child { border-bottom: 0; }
.hours-list dt { color: var(--color-muted); }
.hours-list dd { color: var(--color-ink); }
.hours-list dd.pending { color: var(--color-muted); font-style: italic; }

/* 29.6 TRANG 404 — đúng gu thương hiệu */
.error-page { min-height: 66vh; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; padding-block: var(--space-10); }
.error-page__code { font-family: var(--font-display); font-weight: 600; font-size: clamp(5rem, 10vw, 9rem); line-height: 1; color: var(--color-brand-forest); letter-spacing: -0.02em; }
.error-page__code em { font-style: italic; color: var(--color-accent); }
.error-page h1 { font-family: var(--font-display); font-weight: 500; font-size: var(--fs-h1); color: var(--color-ink); margin-top: var(--space-4); }
.error-page > p { color: var(--color-muted); font-size: var(--fs-body-lg); max-width: 48ch; margin-top: var(--space-4); }
.error-search { display: flex; gap: var(--space-3); margin-top: var(--space-7); width: 100%; max-width: 440px; }
.error-search input { flex: 1; background: #fff; border: 1px solid var(--color-line); border-radius: var(--radius-sm); padding: var(--space-3) var(--space-4); font-size: var(--fs-body); }
.error-search input:focus { outline: none; border-color: var(--color-line-strong); box-shadow: 0 0 0 3px rgba(47,92,67,0.25); }
.error-links { display: flex; flex-wrap: wrap; gap: var(--space-3); justify-content: center; margin-top: var(--space-7); }
.error-links a { background: var(--color-surface-white); border: 1px solid var(--color-line); border-radius: var(--radius-pill); padding: var(--space-3) var(--space-5); font-size: var(--fs-small); font-weight: 500; color: var(--color-ink); text-decoration: none; transition: border-color var(--dur-fast) var(--ease-standard), color var(--dur-fast) var(--ease-standard); }
.error-links a:hover { border-color: var(--color-brand-forest); color: var(--color-brand-forest); }

/* =========================================================================
   THÊM: nav dropdown "Kiến thức" (disclosure desktop) + accordion (drawer mobile)
   Component MỚI — KHÔNG sửa style đã duyệt ở trên; chỉ dùng biến gốc đã khoá.
   Panel nền trắng, chữ mực (tương phản AA); terracotta chỉ làm dấu chọn/vạch.
   ========================================================================= */

/* --- Desktop: nút disclosure + panel dropdown --- */
.nav__item.has-dropdown { position: relative; }
.nav__dropdown-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding-inline: 0;            /* huỷ padding mặc định của <button>, canh như .nav__link */
  cursor: pointer;
}
.nav__caret {
  width: 10px; height: 6px; flex-shrink: 0;
  transition: transform var(--dur-base) var(--ease-standard);
}
.has-dropdown:hover .nav__caret,
.has-dropdown.is-open .nav__caret { transform: rotate(180deg); }

/* Trạng thái "đang ở khu Kiến thức": tô như nav__link active (gạch chân + forest) */
.nav__dropdown-btn.is-section-active { color: var(--color-brand-forest); font-weight: 600; }
.nav__dropdown-btn.is-section-active::after { transform: scaleX(1); }

.nav__dropdown {
  position: absolute; top: 100%; left: 0;
  min-width: 244px;
  margin: 0;
  background: var(--color-surface-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  display: flex; flex-direction: column; gap: 2px;
  opacity: 0; visibility: hidden; transform: translateY(6px);
  pointer-events: none;
  transition: opacity var(--dur-base) var(--ease-standard),
              transform var(--dur-base) var(--ease-standard),
              visibility var(--dur-base) var(--ease-standard);
  z-index: 60;
}
/* mở bằng hover (chuột) LẪN .is-open (JS: nút/bàn phím) */
.has-dropdown:hover .nav__dropdown,
.has-dropdown.is-open .nav__dropdown {
  opacity: 1; visibility: visible; transform: none; pointer-events: auto;
}
.nav__dropdown a {
  display: block; text-decoration: none;
  color: var(--color-ink); font-size: var(--fs-small); font-weight: 500;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  transition: background-color var(--dur-fast) var(--ease-standard),
              color var(--dur-fast) var(--ease-standard);
}
.nav__dropdown a:hover { background: var(--color-surface); color: var(--color-brand-forest); }
.nav__dropdown a[aria-current="page"] {
  background: var(--color-surface);
  color: var(--color-brand-forest);
  font-weight: 600;
  box-shadow: inset 2px 0 0 var(--color-accent); /* dấu chọn: vạch terracotta trang trí */
}

/* --- Mobile drawer: "Kiến thức" thành accordion (KHÔNG hover) --- */
.drawer-acc { border-bottom: 1px solid rgba(255,255,255,0.12); }
.drawer-acc__btn {
  width: 100%;
  display: flex; justify-content: space-between; align-items: center; gap: var(--space-4);
  color: #fff; text-align: left;
  font-family: var(--font-display); font-size: 1.75rem; font-weight: 500;
  padding-block: var(--space-3);
}
.drawer-acc__btn.is-section-active { color: #E7DFD3; }
.drawer-acc__caret {
  width: 15px; height: 9px; flex-shrink: 0; color: #C9D3CB;
  transition: transform var(--dur-base) var(--ease-standard);
}
.drawer-acc__btn[aria-expanded="true"] .drawer-acc__caret { transform: rotate(180deg); }
.drawer-acc__panel {
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--dur-base) var(--ease-standard);
}
.drawer-acc__panel.is-open { max-height: 340px; }   /* đủ chứa 4 link submenu */
.drawer-acc__panel a {
  display: block; color: #E7EBE6; text-decoration: none;
  font-family: var(--font-body); font-size: 1.0625rem; font-weight: 500;
  padding: var(--space-3) 0 var(--space-3) var(--space-5);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.drawer-acc__panel a:last-child { border-bottom: 0; }
.drawer-acc__panel a[aria-current="page"] { color: #E7DFD3; }

/* =========================================================================
   15. prefers-reduced-motion — BẮT BUỘC (bản trong 03-prototype-html)
   ========================================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1 !important; transform: none !important; }
}