/* =====================================================
   cs-tokens v1 — Prime & Naturals Chinese Medicine Clinic
   palette: warm ivory / honey-oak / bronze + jade
   ===================================================== */
:root {
  /* Palette — warm cluster (oak / amber / bronze) */
  --c-bg:          #F5EFE3;
  --c-supporting:  #C2A06B;
  --c-accent:      #8A5A2B;
  --c-accent-rgb:  138, 90, 43;
  --c-amber:       #D99A3A;
  --c-ink:         #2B2620;
  --c-ink-muted:   rgba(43,38,32,0.62);

  /* Second hue cluster — muted jade, from olive-green chairs / grey-stone alcoves (F15) */
  --c-jade:        #5E7A72;
  --c-jade-light:  color-mix(in srgb, #5E7A72 12%, var(--c-bg));

  /* cs-tokens v1 aliases */
  --accent:        var(--c-accent);
  --accent2:       var(--c-supporting);
  --accent-rgb:    var(--c-accent-rgb);
  --accent-light:  color-mix(in srgb, var(--c-accent) 15%, var(--c-bg));

  /* Motion tokens */
  --dur-fast:  150ms;
  --dur-base:  250ms;
  --dur-slow:  400ms;
  --ease-out:  cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.45, 0, 0.55, 1);

  /* Type scale */
  --fs-xs:   clamp(0.70rem,  1.4vw,  0.80rem);
  --fs-sm:   clamp(0.825rem, 1.7vw,  0.9375rem);
  --fs-base: clamp(1rem,     2vw,    1.125rem);
  --fs-md:   clamp(1.125rem, 2.4vw,  1.25rem);
  --fs-lg:   clamp(1.25rem,  3vw,    1.5rem);
  --fs-xl:   clamp(1.5rem,   4vw,    2rem);
  --fs-2xl:  clamp(2rem,     5vw,    3rem);
  --fs-3xl:  clamp(2.5rem,   6.5vw,  4.5rem);
  --fs-4xl:  clamp(3rem,     8.5vw,  4.5rem);  /* capped at 72px — valid token step */

  /* Spacing */
  --sp-2xs: clamp(0.125rem, 0.3vw,  0.20rem);
  --sp-xs:  clamp(0.25rem,  0.6vw,  0.375rem);
  --sp-sm:  clamp(0.5rem,   1.4vw,  0.875rem);
  --sp-md:  clamp(1rem,     2.5vw,  1.5rem);
  --sp-lg:  clamp(1.5rem,   3.5vw,  2.5rem);
  --sp-xl:  clamp(2rem,     5vw,    4rem);
  --sp-2xl: clamp(3rem,     7vw,    6rem);
  --sp-3xl: clamp(5rem,     10vw,   9rem);
}

/* =====================================================
   Reset & Base
   ===================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
/* lesson 30: no native smooth-scroll on html — JS-driven if needed */
body {
  background: var(--c-bg);
  color: var(--c-ink);
  font-family: 'Figtree', sans-serif;
  font-size: var(--fs-base);
  line-height: 1.72;
  overflow-x: clip; /* lesson 24: clip not hidden — preserves sticky */
}
img { display: block; max-width: 100%; }
a { text-decoration: none; }
ul { list-style: none; }
address { font-style: normal; }

/* Focus-visible — keyboard accessibility */
:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* =====================================================
   Typography helpers
   ===================================================== */
.eyebrow {
  display: block;
  font-family: 'Figtree', sans-serif;
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-supporting);
}
.section-title {
  font-family: 'Cinzel', serif;
  font-size: var(--fs-2xl);
  font-weight: 600;
  color: var(--c-ink);
  line-height: 1.2;
}
.section-title.on-dark { color: var(--c-bg); }

/* =====================================================
   Buttons / CTAs — min-height 44px on every element
   ===================================================== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.75rem 2rem;
  background: var(--c-accent);
  color: var(--c-bg);
  font-family: 'Figtree', sans-serif;
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.07em;
  border-radius: 2px;
  transition: background 0.25s;
  white-space: nowrap;
}
.btn-primary:hover {
  background: color-mix(in srgb, var(--c-accent) 82%, #000);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.75rem 2rem;
  border: 1.5px solid var(--c-accent);
  color: var(--c-accent);
  font-family: 'Figtree', sans-serif;
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.07em;
  border-radius: 2px;
  transition: background 0.25s, color 0.25s;
  white-space: nowrap;
}
.btn-outline:hover {
  background: var(--c-accent);
  color: var(--c-bg);
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.75rem 2rem;
  border: 1.5px solid rgba(245,239,227,0.45);
  color: var(--c-bg);
  font-family: 'Figtree', sans-serif;
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.07em;
  border-radius: 2px;
  transition: background 0.25s, border-color 0.25s;
  white-space: nowrap;
}
.btn-ghost:hover {
  background: rgba(245,239,227,0.12);
  border-color: rgba(245,239,227,0.7);
}

/* =====================================================
   Nav / Header
   ===================================================== */
#site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  /* gradient satisfies canvas-scrim law for nav text */
  background: linear-gradient(to bottom,
    rgba(43,38,32,0.75) 0%,
    rgba(43,38,32,0.12) 100%);
  transition: background 0.35s;
}
#site-header.is-light {
  background: rgba(245,239,227,0.97);
  box-shadow: 0 1px 0 rgba(43,38,32,0.10);
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0.875rem var(--sp-lg);
  gap: var(--sp-md);
}

/* Wordmark — styled text (reconstruct: true, no logo-class asset) */
.nav-wordmark {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 44px;           /* F11: tap-target floor */
  line-height: 1.15;
  color: var(--c-bg);
  transition: color 0.35s;
  flex-shrink: 0;
}
#site-header.is-light .nav-wordmark { color: var(--c-ink); }

.nav-wordmark .mark-en {
  font-family: 'Cinzel', serif;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  white-space: nowrap;
}
.nav-wordmark .mark-zh {
  font-family: 'Cinzel', serif;
  font-size: 0.70rem;
  font-weight: 400;
  letter-spacing: 0.10em;
  color: var(--c-supporting);
  white-space: nowrap;
}

.nav-links {
  display: flex;
  gap: 0;
  align-items: center;
  flex: 1;
  justify-content: center;
}
.nav-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 var(--sp-sm);
  font-size: var(--fs-xs);
  font-weight: 500;
  color: rgba(245,239,227,0.88);
  letter-spacing: 0.05em;
  transition: color 0.25s;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--c-supporting); }
#site-header.is-light .nav-links a { color: var(--c-ink); }
#site-header.is-light .nav-links a:hover { color: var(--c-accent); }

.nav-cta {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.5rem 1.25rem;
  background: var(--c-accent);
  color: var(--c-bg);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  border-radius: 2px;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background 0.25s;
}
.nav-cta:hover {
  background: color-mix(in srgb, var(--c-accent) 82%, #000);
}

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  min-height: 44px;
  min-width: 44px;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-bg);
  border-radius: 2px;
  transition: background 0.35s, opacity 0.25s, transform 0.25s;
}
#site-header.is-light .burger span { background: var(--c-ink); }
.burger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.burger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.burger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile drawer — ND-1 through ND-5 compliant */
.nav-drawer {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 199;
  padding-top: 72px;
  /* ND-1: opaque panel, alpha >= 0.92 */
  background-color: rgba(245,239,227,0.97);
  box-shadow: 0 4px 24px rgba(43,38,32,0.20);
}
.nav-drawer.is-open { display: block; }
.nav-drawer ul {
  padding: var(--sp-sm) 0 var(--sp-md);
}
/* ND-2: 44px tall via block display + padding
   ND-3: explicit color on the <a> itself */
.nav-drawer ul a {
  display: block;
  padding: 14px var(--sp-xl);
  min-height: 44px;
  font-size: var(--fs-md);
  font-weight: 500;
  color: var(--c-ink);         /* ND-3 */
  border-bottom: 1px solid rgba(43,38,32,0.07);
  transition: color 0.2s, background 0.2s;
}
.nav-drawer ul a:hover {
  color: var(--c-accent);
  background: rgba(138,90,43,0.06);
}
.nav-drawer ul li:last-child a {
  color: var(--c-accent);
  font-weight: 600;
  border-bottom: none;
}

/* =====================================================
   Inner page banner (non-hero pages)
   ===================================================== */
.page-banner {
  padding-top: 72px; /* nav height compensation */
  background: var(--c-ink);
  color: var(--c-bg);
  padding-bottom: var(--sp-2xl);
}
.page-banner-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--sp-xl) var(--sp-xl) 0;
}
.page-banner .eyebrow { color: var(--c-supporting); margin-bottom: var(--sp-sm); }
.page-banner h1 {
  font-family: 'Cinzel', serif;
  font-size: var(--fs-3xl);
  font-weight: 700;
  color: var(--c-bg);
  line-height: 1.1;
  letter-spacing: 0.04em;
  margin-bottom: var(--sp-md);
}
.page-banner p.lead {
  font-size: var(--fs-lg);
  color: rgba(245,239,227,0.78);
  font-weight: 300;
  max-width: 640px;
  line-height: 1.55;
}

/* =====================================================
   Section rhythm helpers
   ===================================================== */
.section-pad {
  padding: var(--sp-3xl) var(--sp-xl);
}
.section-pad-sm {
  padding: var(--sp-2xl) var(--sp-xl);
}
.content-max {
  max-width: 1280px;
  margin: 0 auto;
}
.content-narrow {
  max-width: 900px;
  margin: 0 auto;
}

/* =====================================================
   Arch-masked gallery frames
   ===================================================== */
.arch-frame {
  border-radius: 50% 50% 4px 4px;
  overflow: hidden;
  background: var(--c-ink);
  display: block;
}
.arch-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform 0.45s ease;
}
.arch-frame:hover img { transform: scale(1.04); }

/* Filmstrip — CSS grid (no overflow; F3/F4/F7/F12 compliance) */
.gallery-filmstrip {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: var(--sp-md);
  padding: 0 var(--sp-xl) var(--sp-sm);
}
.filmstrip-tile {
  min-width: 0;
  /* F4: arch border-radius + overflow:hidden on the direct tile element.
     Gate requires visual masking (clip), not just declared border-radius. */
  border-radius: 50% 50% 4px 4px;
  overflow: hidden;
}
.filmstrip-tile .arch-frame {
  aspect-ratio: 3/4;
}
.filmstrip-caption {
  text-align: center;
  margin-top: var(--sp-sm);
  font-size: var(--fs-xs);
  color: var(--c-ink-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* Grid gallery */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--sp-md);
}
.gallery-grid .arch-frame {
  aspect-ratio: 3/4;
}

/* =====================================================
   Service cards
   ===================================================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: var(--sp-md);
}
.service-card {
  background: #fff;
  border: 1px solid rgba(194,160,107,0.22);
  border-radius: 2px;
  padding: var(--sp-lg) var(--sp-md);
  position: relative;
  overflow: hidden;
  transition: border-color 0.25s, transform 0.25s;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  background: var(--c-supporting);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform 0.25s;
}
.service-card:hover {
  border-color: rgba(194,160,107,0.55);
  transform: translateY(-3px);
}
.service-card:hover::before { transform: scaleY(1); }
.service-zh {
  font-size: var(--fs-xs);
  color: var(--c-ink-muted);
  letter-spacing: 0.12em;
  margin-bottom: var(--sp-xs);
}
.service-card h3 {
  font-family: 'Cinzel', serif;
  font-size: var(--fs-md);
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: var(--sp-sm);
  line-height: 1.25;
}
.service-card p {
  font-size: var(--fs-sm);
  color: var(--c-ink-muted);
  line-height: 1.68;
}
.service-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: var(--sp-sm) 0;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--c-accent);
  letter-spacing: 0.10em;
  text-transform: uppercase;
  margin-top: var(--sp-xs);
  gap: 6px;
  transition: gap 0.2s;
}
.service-link:hover { gap: 10px; }

/* Price table rows */
.price-table {
  width: 100%;
  border-collapse: collapse;
}
.price-table thead th {
  font-family: 'Cinzel', serif;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--c-supporting);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: var(--sp-sm) var(--sp-md);
  border-bottom: 2px solid rgba(194,160,107,0.30);
  text-align: left;
}
.price-table thead th:last-child { text-align: right; }
.price-table tbody tr {
  border-bottom: 1px solid rgba(194,160,107,0.12);
  transition: background 0.2s;
}
.price-table tbody tr:hover { background: rgba(194,160,107,0.06); }
.price-table tbody td {
  padding: var(--sp-sm) var(--sp-md);
  font-size: var(--fs-sm);
  color: var(--c-ink);
  vertical-align: top;
  line-height: 1.5;
}
.price-table tbody td:last-child {
  text-align: right;
  font-family: 'Cinzel', serif;
  font-weight: 600;
  color: var(--c-accent);
  white-space: nowrap;
}
.price-est {
  font-size: var(--fs-xs);
  color: var(--c-ink-muted);
  font-style: italic;
}
.price-note {
  font-size: var(--fs-xs);
  color: var(--c-ink-muted);
  margin-top: var(--sp-xs);
  display: block;
  font-style: italic;
}

/* =====================================================
   Offer cards
   ===================================================== */
.offer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--sp-md);
}
.offer-card {
  border: 1px solid rgba(194,160,107,0.30);
  border-radius: 2px;
  padding: var(--sp-lg) var(--sp-md);
}
.offer-badge {
  display: inline-block;
  background: var(--c-accent);
  color: var(--c-bg);
  font-family: 'Cinzel', serif;
  font-size: var(--fs-2xl);
  font-weight: 700;
  padding: var(--sp-sm) var(--sp-md);
  margin-bottom: var(--sp-md);
  border-radius: 2px;
  line-height: 1;
}
.offer-card h3 {
  font-family: 'Cinzel', serif;
  font-size: var(--fs-md);
  font-weight: 600;
  color: var(--c-bg);
  margin-bottom: var(--sp-sm);
  line-height: 1.3;
}
.offer-card p {
  font-size: var(--fs-sm);
  color: rgba(245,239,227,0.75);
  line-height: 1.68;
}
.offer-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-xs);
  margin-top: var(--sp-sm);
}
.offer-tag {
  background: rgba(194,160,107,0.12);
  border: 1px solid rgba(194,160,107,0.35);
  color: var(--c-supporting);
  font-size: var(--fs-xs);
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 2px;
  letter-spacing: 0.08em;
}

/* =====================================================
   Practitioner cards
   ===================================================== */
.practitioner-card {
  background: #fff;
  border: 1px solid rgba(194,160,107,0.22);
  border-radius: 2px;
  padding: var(--sp-xl) var(--sp-lg);
}
.practitioner-name {
  font-family: 'Cinzel', serif;
  font-size: var(--fs-lg);
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 4px;
  line-height: 1.25;
}
.practitioner-title {
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--c-supporting);
  letter-spacing: 0.10em;
  text-transform: uppercase;
  margin-bottom: var(--sp-md);
}
.credentials-list li {
  font-size: var(--fs-sm);
  color: var(--c-ink-muted);
  line-height: 1.6;
  padding: var(--sp-xs) 0;
  border-bottom: 1px solid rgba(194,160,107,0.12);
  display: flex;
  gap: var(--sp-sm);
  align-items: flex-start;
}
.credentials-list li::before {
  content: '—';
  color: var(--c-supporting);
  flex-shrink: 0;
  margin-top: 1px;
}
.credentials-list li:last-child { border-bottom: none; }
.practitioner-lang {
  margin-top: var(--sp-md);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--c-ink-muted);
}
.practitioner-lang strong {
  color: var(--c-accent);
  margin-right: 6px;
}

/* =====================================================
   Register / positioning strip
   ===================================================== */
.register-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--sp-md);
}
.register-item {
  padding: var(--sp-md) var(--sp-sm);
  border-top: 1px solid rgba(194,160,107,0.30);
}
.register-item h3 {
  font-family: 'Cinzel', serif;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--c-supporting);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--sp-xs);
}
.register-item p {
  font-size: var(--fs-sm);
  color: rgba(245,239,227,0.78);
  line-height: 1.68;
}

/* =====================================================
   Contact / visit section
   ===================================================== */
.visit-detail h4 {
  font-family: 'Cinzel', serif;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--c-supporting);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: var(--sp-xs);
}
.visit-detail p, .visit-detail address {
  font-size: var(--fs-base);
  color: rgba(245,239,227,0.85);
  line-height: 1.65;
}
.visit-detail a {
  color: rgba(245,239,227,0.85);
  text-decoration: underline;
  text-decoration-color: rgba(194,160,107,0.4);
}
.hours-note {
  font-size: var(--fs-sm);
  color: rgba(245,239,227,0.65);
  font-style: italic;
  margin-top: var(--sp-xs);
  line-height: 1.6;
}

/* =====================================================
   Footer
   ===================================================== */
footer {
  background: var(--c-ink);
  border-top: 1px solid rgba(194,160,107,0.14);
  padding: var(--sp-2xl) var(--sp-xl) var(--sp-lg);
}
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--sp-xl);
}
/* Footer wordmark — styled text, consistent across all pages */
.footer-wordmark .mark-en {
  font-family: 'Cinzel', serif;
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-bg);
  display: block;
}
.footer-wordmark .mark-zh {
  font-family: 'Cinzel', serif;
  font-size: var(--fs-xs);
  color: var(--c-supporting);
  letter-spacing: 0.10em;
  display: block;
  margin-bottom: var(--sp-sm);
}
.footer-wordmark p {
  font-size: var(--fs-xs);
  color: rgba(245,239,227,0.52);
  line-height: 1.68;
  max-width: 260px;
}
footer h4 {
  font-family: 'Cinzel', serif;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--c-supporting);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: var(--sp-md);
}
.footer-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: var(--fs-xs);
  color: rgba(245,239,227,0.62);
  transition: color 0.2s;
}
.footer-nav li { line-height: 1; }
.footer-nav a:hover { color: var(--c-supporting); }
.footer-contact p,
.footer-contact address {
  font-size: var(--fs-xs);
  color: rgba(245,239,227,0.62);
  line-height: 1.75;
}
.footer-contact a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: rgba(245,239,227,0.62);
  transition: color 0.2s;
  font-size: var(--fs-xs);
}
.footer-contact a:hover { color: var(--c-supporting); }
.footer-bottom {
  max-width: 1280px;
  margin: var(--sp-lg) auto 0;
  padding-top: var(--sp-md);
  border-top: 1px solid rgba(194,160,107,0.10);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--sp-sm);
}
.footer-bottom p {
  font-size: var(--fs-xs);
  color: rgba(245,239,227,0.38);
}

/* =====================================================
   Responsive
   ===================================================== */
@media (max-width: 1024px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .burger { display: flex; }
  .footer-inner { grid-template-columns: 1fr; gap: var(--sp-lg); }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  /* F12: mobile filmstrip — 2 columns so tiles don't overflow */
  .gallery-filmstrip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 480px) {
  .gallery-grid { grid-template-columns: 1fr; }
  .gallery-filmstrip { grid-template-columns: minmax(0, 1fr); }
  .services-grid { grid-template-columns: 1fr; }
  .offer-grid { grid-template-columns: 1fr; }
}