/* ─────────────────────────────────────────────────────────────
   RESET & BASE
───────────────────────────────────────────────────────────── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ─────────────────────────────────────────────────────────────
   CSS VARIABLES
───────────────────────────────────────────────────────────── */
:root {
  --bg-primary:      #F8F5F0;
  --bg-secondary:    #FFFFFF;
  --bg-elevated:     #FFFFFF;
  --bg-warm:         #FDF9F4;
  --text-primary:    #1C1410;
  --text-secondary:  #6B5D52;
  --text-tertiary:   #A89080;
  --border-light:    #E8DDD4;
  --border-medium:   #D4C4B8;
  --accent-primary:  #B5152B;
  --accent-gold:     #9A6B2E;
  --accent-warm:     rgba(181,21,43,0.08);
  --shadow-sm:  0 1px 3px rgba(28,20,16,0.06);
  --shadow-md:  0 4px 16px rgba(28,20,16,0.08);
  --shadow-lg:  0 8px 32px rgba(28,20,16,0.12);
  --shadow-xl:  0 20px 60px rgba(28,20,16,0.16);
  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  16px;
  --radius-xl:  24px;
  /* spacing */
  --sp-1:  0.25rem;
  --sp-2:  0.5rem;
  --sp-3:  0.75rem;
  --sp-4:  1rem;
  --sp-5:  1.25rem;
  --sp-6:  1.5rem;
  --sp-8:  2rem;
  --sp-10: 2.5rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-20: 5rem;
  /* type */
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  /* transitions */
  --t-fast:   150ms ease;
  --t-base:   250ms ease;
  --t-slow:   400ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --t-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

[data-theme="dark"] {
  --bg-primary:   #0E0B09;
  --bg-secondary: #161210;
  --bg-elevated:  #1E1916;
  --bg-warm:      #1A1512;
  --text-primary: #F2EDE8;
  --text-secondary: #A89080;
  --text-tertiary: #6B5D52;
  --border-light:  #2A211C;
  --border-medium: #3A2D26;
  --accent-primary: #E02040;
  --accent-gold:    #C28A40;
  --accent-warm:    rgba(224,32,64,0.12);
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.3);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg:  0 8px 32px rgba(0,0,0,0.5);
  --shadow-xl:  0 20px 60px rgba(0,0,0,0.6);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Jost', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-image:
    radial-gradient(ellipse at 20% 0%, rgba(181,21,43,0.04) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 100%, rgba(154,107,46,0.04) 0%, transparent 60%);
  background-attachment: fixed;
}

[data-theme="dark"] body {
  background-image:
    radial-gradient(ellipse at 20% 0%, rgba(181,21,43,0.06) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 100%, rgba(154,107,46,0.06) 0%, transparent 60%);
}

::selection {
  background: var(--accent-primary);
  color: white;
}

/* ─────────────────────────────────────────────────────────────
   LAYOUT
───────────────────────────────────────────────────────────── */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--sp-20) var(--sp-8);
}

/* ─────────────────────────────────────────────────────────────
   FIXED CONTROLS (menu + theme)
───────────────────────────────────────────────────────────── */
.menu-toggle,
.theme-toggle {
  position: fixed;
  top: var(--sp-6);
  background: var(--bg-elevated);
  border: 1px solid var(--border-light);
  border-radius: 50%;
  width: 48px;
  height: 48px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  z-index: 1001;
  transition: border-color var(--t-base), box-shadow var(--t-base), background-color var(--t-base), transform var(--t-base);
}

.menu-toggle { left: var(--sp-6); }
.theme-toggle { right: var(--sp-6); z-index: 1000; }

.menu-toggle:hover,
.theme-toggle:hover {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.menu-toggle:active,
.theme-toggle:active { transform: translateY(0); }

.menu-icon {
  width: 20px;
  height: 14px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.menu-line {
  height: 1.5px;
  width: 100%;
  background: var(--text-primary);
  border-radius: 2px;
  transform-origin: center;
  transition: transform 350ms cubic-bezier(0.23, 1, 0.32, 1),
              opacity 250ms ease,
              background-color var(--t-base);
}

.menu-open .menu-line:nth-child(1) { transform: translateY(6.25px) rotate(45deg); }
.menu-open .menu-line:nth-child(2) { opacity: 0; transform: scaleX(0); }
.menu-open .menu-line:nth-child(3) { transform: translateY(-6.25px) rotate(-45deg); }

.theme-icon {
  width: 20px;
  height: 20px;
  color: var(--text-primary);
  transition: color var(--t-base);
}

/* ─────────────────────────────────────────────────────────────
   NAVIGATION MENU
───────────────────────────────────────────────────────────── */
.nav-menu {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  overflow-y: auto;
  transition: opacity 450ms cubic-bezier(0.23, 1, 0.32, 1),
              visibility 450ms cubic-bezier(0.23, 1, 0.32, 1),
              background-color var(--t-base);
}

.nav-menu.active {
  opacity: 1;
  visibility: visible;
}

.nav-menu-content {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--sp-20) var(--sp-8);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.nav-menu-header {
  padding: var(--sp-8) 0;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: var(--sp-12);
}

.nav-menu-label {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.nav-menu-items {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.nav-menu-item {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
  padding: var(--sp-5) 0;
  text-decoration: none;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-light);
  position: relative;
  opacity: 0;
  transform: translateX(-20px);
  transition: opacity 380ms ease, transform 380ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.nav-menu.active .nav-menu-item { opacity: 1; transform: translateX(0); }
.nav-menu.active .nav-menu-item:nth-child(1) { transition-delay:  60ms; }
.nav-menu.active .nav-menu-item:nth-child(2) { transition-delay: 100ms; }
.nav-menu.active .nav-menu-item:nth-child(3) { transition-delay: 140ms; }
.nav-menu.active .nav-menu-item:nth-child(4) { transition-delay: 180ms; }
.nav-menu.active .nav-menu-item:nth-child(5) { transition-delay: 220ms; }
.nav-menu.active .nav-menu-item:nth-child(6) { transition-delay: 260ms; }
.nav-menu.active .nav-menu-item:nth-child(7) { transition-delay: 300ms; }
.nav-menu.active .nav-menu-item:nth-child(8) { transition-delay: 340ms; }

/* Indent effect on hover using transform — no layout reflow */
.nav-menu-item:hover .nav-menu-number { transform: translateX(8px); }

.nav-menu-number {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  letter-spacing: 0.08em;
  min-width: 2rem;
  font-weight: 500;
  transition: transform var(--t-base), color var(--t-base);
}

.nav-menu-text {
  flex: 1;
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: clamp(var(--text-2xl), 4vw, var(--text-3xl));
  font-weight: 300;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: color var(--t-base);
}

.nav-menu-item:hover .nav-menu-text,
.nav-menu-item.active .nav-menu-text { color: var(--accent-primary); }

.nav-menu-arrow {
  font-size: var(--text-xl);
  color: var(--accent-primary);
  opacity: 0;
  transform: translateX(-8px);
  transition: opacity var(--t-base), transform var(--t-base);
}

.nav-menu-item:hover .nav-menu-arrow,
.nav-menu-item.active .nav-menu-arrow { opacity: 1; transform: translateX(0); }

.nav-menu-footer {
  padding-top: var(--sp-8);
  border-top: 1px solid var(--border-light);
  margin-top: auto;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 500ms ease 400ms, transform 500ms ease 400ms;
}

.nav-menu.active .nav-menu-footer { opacity: 1; transform: translateY(0); }

.nav-menu-footer p {
  color: var(--text-tertiary);
  font-size: var(--text-sm);
  margin-top: var(--sp-3);
}

.nav-donate-link {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-5);
  background: var(--accent-primary);
  color: white;
  border-radius: 100px;
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: background-color var(--t-base), transform var(--t-base), box-shadow var(--t-base);
}

.nav-donate-link:hover {
  background: #9A1020;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(181,21,43,0.35);
}

body.menu-open { overflow: hidden; }

/* ─────────────────────────────────────────────────────────────
   HEADER
───────────────────────────────────────────────────────────── */
.header {
  text-align: center;
  padding: var(--sp-4) 0 var(--sp-10) 0;
  margin-bottom: var(--sp-8);
  border-bottom: 1px solid var(--border-light);
  position: relative;
}

.header-ornament {
  display: block;
  font-size: var(--text-4xl);
  line-height: 1;
  margin-bottom: var(--sp-4);
  opacity: 0.35;
  letter-spacing: 0.3em;
}

.header h1 {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: clamp(2.8rem, 7vw, 5rem);
  font-weight: 300;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  line-height: 1.05;
  margin-bottom: var(--sp-3);
}

.header-subtitle {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 500;
}

.header-rule {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-4);
  margin-top: var(--sp-6);
  color: var(--text-tertiary);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
}

.header-rule::before,
.header-rule::after {
  content: '';
  width: 80px;
  height: 1px;
  background: var(--border-medium);
}

/* ─────────────────────────────────────────────────────────────
   AI DIAGNOSIS SECTION
───────────────────────────────────────────────────────────── */
.ai-hero {
  max-width: 680px;
  margin: 0 auto var(--sp-8);
}

.ai-diagnosis {
  background: var(--bg-elevated);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: var(--sp-8);
  box-shadow: var(--shadow-md);
  transition: background-color var(--t-base), border-color var(--t-base), box-shadow var(--t-base);
}

.ai-diagnosis-header {
  margin-bottom: var(--sp-6);
  text-align: center;
}

.ai-diagnosis h2 {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: var(--text-2xl);
  font-weight: 400;
  letter-spacing: 0.04em;
  margin-bottom: var(--sp-1);
}

.ai-diagnosis-desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.5;
}

.ai-form {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.ai-form textarea {
  width: 100%;
  padding: var(--sp-4);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Jost', sans-serif;
  font-size: var(--text-base);
  line-height: 1.6;
  resize: vertical;
  min-height: 90px;
  transition: border-color var(--t-base), box-shadow var(--t-base), background-color var(--t-base);
  outline: none;
}

.ai-form textarea::placeholder { color: var(--text-tertiary); }

.ai-form textarea:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(181,21,43,0.1);
  background: var(--bg-elevated);
}

.image-upload {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
}

.upload-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  border: 1px solid var(--border-light);
  border-radius: 100px;
  background: var(--bg-primary);
  color: var(--text-secondary);
  font-family: 'Jost', sans-serif;
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: border-color var(--t-base), color var(--t-base), background-color var(--t-base), box-shadow var(--t-base);
  white-space: nowrap;
}

.upload-btn:hover {
  border-color: var(--accent-primary);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

.upload-btn input { display: none; }

.image-preview {
  display: none;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  object-fit: cover;
}

.submit-btn {
  width: 100%;
  padding: var(--sp-4) var(--sp-6);
  background: var(--accent-primary);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-family: 'Jost', sans-serif;
  font-size: var(--text-base);
  font-weight: 600;
  letter-spacing: 0.06em;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: background-color var(--t-base), transform var(--t-base), box-shadow var(--t-base);
}

.submit-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.1);
  opacity: 0;
  transition: opacity var(--t-fast);
}

.submit-btn:hover {
  background: #9A1020;
  box-shadow: 0 4px 16px rgba(181,21,43,0.35);
  transform: translateY(-1px);
}

.submit-btn:hover::after { opacity: 1; }
.submit-btn:active { transform: translateY(0); box-shadow: none; }

.submit-btn:disabled {
  opacity: 0.65;
  cursor: wait;
  transform: none;
}

.submit-btn.loading {
  pointer-events: none;
}

.submit-btn .btn-text { transition: opacity var(--t-fast); }
.submit-btn.loading .btn-text { opacity: 0; }

.btn-spinner {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--t-fast);
}

.submit-btn.loading .btn-spinner { opacity: 1; }

@keyframes spin {
  to { transform: rotate(360deg); }
}

.spinner-ring {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 700ms linear infinite;
}

.privacy-note {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-1);
}

/* Diagnosis result — lives outside the narrow hero at full width */
.diagnosis-result-wrap {
  display: none;
  margin-bottom: var(--sp-8);
}

.diagnosis-result-wrap.visible {
  display: block;
  animation: fadeSlideIn 350ms ease forwards;
}

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.diagnosis-result-header {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-bottom: var(--sp-4);
}

.diagnosis-result-label {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-primary);
  flex: 1;
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.diagnosis-result-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-light);
}

.diagnosis-clear-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-1) var(--sp-3);
  border: 1px solid var(--border-light);
  border-radius: 100px;
  background: var(--bg-elevated);
  color: var(--text-tertiary);
  font-family: 'Jost', sans-serif;
  font-size: var(--text-xs);
  font-weight: 500;
  cursor: pointer;
  transition: border-color var(--t-base), color var(--t-base), background-color var(--t-base);
}

.diagnosis-clear-btn:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background: var(--accent-warm);
}

.diagnosis-result {
  padding: var(--sp-6) var(--sp-8);
  background: var(--bg-elevated);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  border-left: 3px solid var(--accent-primary);
  line-height: 1.85;
  font-size: var(--text-base);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
  transition: background-color var(--t-base), border-color var(--t-base);
  word-break: break-word;
  overflow-wrap: break-word;
}

.diagnosis-result p {
  margin: 0 0 var(--sp-4);
  color: var(--text-secondary);
}

.diagnosis-result p:last-child { margin-bottom: 0; }

.diagnosis-result strong {
  color: var(--text-primary);
  font-weight: 600;
}

.diagnosis-result .dx-section-head {
  display: block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-gold);
  margin: var(--sp-5) 0 var(--sp-2);
}

.diagnosis-result .dx-section-head:first-child { margin-top: 0; }

/* Suggested remedies after diagnosis */
.suggestions-wrap {
  margin-top: var(--sp-6);
}

.suggestions-label {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-gold);
  margin-bottom: var(--sp-4);
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.suggestions-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-light);
}

.suggestions-grid {
  display: grid;
  gap: var(--sp-4);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .suggestions-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .suggestions-grid { grid-template-columns: repeat(3, 1fr); }
}

.suggestion-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--sp-5);
  cursor: pointer;
  transition: transform 280ms ease, box-shadow 280ms ease, border-color 200ms ease;
  border-top: 2px solid var(--accent-gold);
}

.suggestion-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-gold);
}

.suggestion-type {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: var(--sp-2);
}

.suggestion-name {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: var(--text-xl);
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--sp-1);
  line-height: 1.2;
}

.suggestion-chinese {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-style: italic;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-bottom: var(--sp-3);
}

.suggestion-benefits {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.5;
}

.suggestion-cta {
  font-size: var(--text-xs);
  color: var(--accent-gold);
  font-weight: 600;
  margin-top: var(--sp-3);
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity var(--t-base), transform var(--t-base);
}

.suggestion-card:hover .suggestion-cta {
  opacity: 1;
  transform: translateX(0);
}

/* ─────────────────────────────────────────────────────────────
   SEARCH & FILTERS
───────────────────────────────────────────────────────────── */
.search-section {
  margin-bottom: var(--sp-8);
  padding-bottom: var(--sp-6);
  border-bottom: 1px solid var(--border-light);
}

.search-wrapper {
  position: relative;
  max-width: 560px;
  margin: 0 auto var(--sp-8);
}

.search-icon-left {
  position: absolute;
  left: var(--sp-4);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
  width: 18px;
  height: 18px;
  pointer-events: none;
  transition: color var(--t-base);
}

.search-input {
  width: 100%;
  padding: var(--sp-4) var(--sp-12) var(--sp-4) var(--sp-10);
  border: 1px solid var(--border-light);
  border-radius: 100px;
  background: var(--bg-elevated);
  color: var(--text-primary);
  font-family: 'Jost', sans-serif;
  font-size: var(--text-base);
  transition: border-color var(--t-base), box-shadow var(--t-base), background-color var(--t-base);
  outline: none;
  box-shadow: var(--shadow-sm);
}

.search-input::placeholder { color: var(--text-tertiary); }

.search-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(181,21,43,0.1), var(--shadow-sm);
}

.search-input:focus + .search-icon-left,
.search-wrapper:focus-within .search-icon-left {
  color: var(--accent-primary);
}

.clear-btn {
  position: absolute;
  right: var(--sp-4);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-tertiary);
  width: 24px;
  height: 24px;
  display: none;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: color var(--t-base), background-color var(--t-base);
}

.clear-btn:hover {
  color: var(--text-primary);
  background: var(--border-light);
}

.clear-btn svg { width: 16px; height: 16px; }

/* ─── Filter groups ─── */
.filter-group {
  margin-bottom: var(--sp-6);
}

/* Top-level filter label (Type / By Body System / Properties) */
.filter-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: var(--sp-4);
  padding-bottom: var(--sp-2);
  border-bottom: 1px solid var(--border-light);
}

.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

/* Body region group labels */
.region-group {
  margin-bottom: var(--sp-4);
}

.region-group:last-child { margin-bottom: 0; }

.region-label {
  display: block;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-gold);
  margin-bottom: var(--sp-2);
  opacity: 0.85;
}

.region-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

.filter-chip {
  padding: 0.3rem var(--sp-3);
  border: 1px solid var(--border-light);
  border-radius: 100px;
  background: var(--bg-elevated);
  color: var(--text-secondary);
  font-family: 'Jost', sans-serif;
  font-size: var(--text-xs);
  font-weight: 500;
  cursor: pointer;
  line-height: 1.6;
  transition: border-color var(--t-base), color var(--t-base),
              background-color var(--t-base), box-shadow var(--t-base),
              transform var(--t-fast);
}

.filter-chip:hover {
  border-color: var(--accent-primary);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

.filter-chip:active { transform: scale(0.96); }

.filter-chip.active {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: white;
  box-shadow: 0 2px 8px rgba(181,21,43,0.3);
}

/* ─────────────────────────────────────────────────────────────
   RESULTS GRID
───────────────────────────────────────────────────────────── */
.results-grid {
  display: grid;
  gap: var(--sp-5);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .results-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .results-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ─────────────────────────────────────────────────────────────
   RECIPE CARD
───────────────────────────────────────────────────────────── */
.recipe-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--sp-6);
  cursor: pointer;
  transition: opacity 360ms ease, translate 360ms cubic-bezier(0.25, 0.46, 0.45, 0.94),
              box-shadow 260ms ease, border-color 180ms ease,
              background-color 180ms ease;
}

/* Applied by JS for exactly one frame before reveal — never persists in layout */
.recipe-card.pre-reveal {
  opacity: 0;
  translate: 0 14px;
}

/* Hover lift */
.recipe-card:hover {
  box-shadow: var(--shadow-xl);
  border-color: var(--accent-primary);
  translate: 0 -4px;
}

.recipe-card:active { translate: 0 -2px; }

.recipe-header {
  margin-bottom: var(--sp-4);
}

.recipe-type-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  padding: var(--sp-1) var(--sp-3);
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: 100px;
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--sp-3);
  transition: background-color var(--t-base);
}

.recipe-title {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: var(--text-2xl);
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--sp-1);
  line-height: 1.2;
  transition: color var(--t-base);
}

.recipe-card:hover .recipe-title { color: var(--accent-primary); }

.recipe-chinese {
  font-size: var(--text-base);
  color: var(--text-secondary);
  margin-bottom: var(--sp-3);
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-style: italic;
}

.recipe-properties {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin: var(--sp-3) 0;
}

.property-tag {
  padding: var(--sp-1) var(--sp-3);
  background: var(--accent-warm);
  color: var(--accent-primary);
  border-radius: 100px;
  font-size: var(--text-xs);
  font-weight: 500;
}

.recipe-benefits {
  margin: var(--sp-4) 0;
  padding: var(--sp-4);
  background: var(--bg-primary);
  border-radius: var(--radius-md);
  transition: background-color var(--t-base);
}

.benefits-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: var(--sp-2);
  display: block;
}

.benefits-text {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.6;
}

.ingredients-preview {
  margin-top: var(--sp-4);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--border-light);
}

.ingredients-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: var(--sp-2);
  display: block;
}

.ingredients-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

.ingredient-tag {
  padding: var(--sp-1) var(--sp-3);
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: 100px;
  font-size: var(--text-xs);
  color: var(--text-secondary);
  font-weight: 500;
  transition: background-color var(--t-base), border-color var(--t-base);
}

.card-cta {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
  font-size: var(--text-sm);
  color: var(--accent-primary);
  font-weight: 600;
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity var(--t-base), transform var(--t-base);
}

.recipe-card:hover .card-cta {
  opacity: 1;
  transform: translateX(0);
}

.no-results {
  text-align: center;
  padding: var(--sp-16) var(--sp-8);
  color: var(--text-tertiary);
  grid-column: 1 / -1;
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: var(--text-xl);
  font-style: italic;
}

/* ─────────────────────────────────────────────────────────────
   MODAL
───────────────────────────────────────────────────────────── */
.modal {
  display: flex;
  position: fixed;
  inset: 0;
  background: rgba(14, 11, 9, 0.7);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 2000;
  padding: var(--sp-6);
  align-items: center;
  justify-content: center;
  /* visibility toggle via opacity */
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 300ms ease, visibility 300ms ease;
  overflow-y: auto;
}

.modal.active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.modal-content {
  background: var(--bg-elevated);
  border-radius: var(--radius-xl);
  max-width: 760px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  padding: var(--sp-10);
  box-shadow: var(--shadow-xl);
  transform: translateY(24px) scale(0.97);
  transition: transform 380ms cubic-bezier(0.34, 1.56, 0.64, 1);
  /* custom scrollbar */
  scrollbar-width: thin;
  scrollbar-color: var(--border-medium) transparent;
}

.modal.active .modal-content {
  transform: translateY(0) scale(1);
}

.modal-content::-webkit-scrollbar { width: 6px; }
.modal-content::-webkit-scrollbar-track { background: transparent; }
.modal-content::-webkit-scrollbar-thumb { background: var(--border-medium); border-radius: 3px; }

.modal-close {
  position: absolute;
  top: var(--sp-6);
  right: var(--sp-6);
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  font-size: var(--text-lg);
  cursor: pointer;
  color: var(--text-secondary);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  line-height: 1;
  transition: background-color var(--t-base), color var(--t-base), transform var(--t-base);
}

.modal-close:hover {
  background: var(--accent-primary);
  color: white;
  border-color: var(--accent-primary);
  transform: rotate(90deg);
}

.modal-title {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: clamp(var(--text-2xl), 4vw, var(--text-4xl));
  font-weight: 400;
  color: var(--text-primary);
  margin-bottom: var(--sp-1);
  line-height: 1.1;
  padding-right: var(--sp-10);
}

.modal-chinese {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: var(--text-xl);
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: var(--sp-6);
}

.modal-divider {
  width: 48px;
  height: 2px;
  background: var(--accent-primary);
  margin: var(--sp-6) 0;
  border-radius: 1px;
}

.modal-section {
  margin-bottom: var(--sp-8);
}

.modal-section-title {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-gold);
  margin-bottom: var(--sp-4);
}

.modal-section-content {
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: var(--text-base);
}

.ingredients-list {
  list-style: none;
}

.ingredients-list li {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  gap: var(--sp-4);
  padding: var(--sp-3) 0;
  border-bottom: 1px solid var(--border-light);
}

.ingredient-name { font-weight: 500; color: var(--text-primary); }
.ingredient-amount { color: var(--text-secondary); font-size: var(--text-sm); white-space: nowrap; }
.ingredient-props {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  padding: var(--sp-1) 0 var(--sp-3);
  grid-column: 1 / -1;
  margin-top: calc(var(--sp-1) * -1);
  font-style: italic;
}

.preparation-steps {
  list-style: none;
  counter-reset: step;
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.preparation-steps li {
  counter-increment: step;
  padding: var(--sp-4) var(--sp-4) var(--sp-4) calc(var(--sp-10) + var(--sp-2));
  background: var(--bg-primary);
  border-radius: var(--radius-md);
  position: relative;
  color: var(--text-secondary);
  line-height: 1.7;
  transition: background-color var(--t-base);
}

.preparation-steps li::before {
  content: counter(step);
  position: absolute;
  left: var(--sp-4);
  top: var(--sp-4);
  width: 26px;
  height: 26px;
  background: var(--accent-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: 700;
}

.contraindications-box {
  padding: var(--sp-4) var(--sp-5);
  background: rgba(181,21,43,0.06);
  border-left: 3px solid var(--accent-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--text-primary);
  font-size: var(--text-sm);
  line-height: 1.7;
}

/* ─────────────────────────────────────────────────────────────
   FOOTER
───────────────────────────────────────────────────────────── */
.footer {
  text-align: center;
  margin-top: var(--sp-12);
  padding-top: var(--sp-8);
  padding-bottom: var(--sp-8);
  border-top: 1px solid var(--border-light);
  color: var(--text-tertiary);
  font-size: var(--text-sm);
}

.footer p + p { margin-top: var(--sp-2); font-size: var(--text-xs); }

.footer-donate {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-5);
  background: var(--accent-primary);
  color: white;
  border-radius: 100px;
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: var(--sp-5);
  transition: background-color var(--t-base), transform var(--t-base), box-shadow var(--t-base);
}

.footer-donate:hover {
  background: #9A1020;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(181,21,43,0.35);
}

/* ─────────────────────────────────────────────────────────────
   RESPONSIVE — TABLET
───────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  /* Container — less top padding on mobile (fixed buttons are 44px + 16px gap) */
  .container {
    padding: 5rem var(--sp-5) var(--sp-8);
  }

  /* Buttons */
  .menu-toggle,
  .theme-toggle {
    width: 44px;
    height: 44px;
    top: var(--sp-4);
  }
  .menu-toggle { left: var(--sp-4); }
  .theme-toggle { right: var(--sp-4); }

  /* Header — compact on mobile */
  .header {
    padding: var(--sp-2) 0 var(--sp-8) 0;
    margin-bottom: var(--sp-6);
  }

  .header h1 {
    font-size: clamp(2.2rem, 10vw, 3.5rem);
    margin-bottom: var(--sp-2);
  }

  .header-ornament { font-size: var(--text-3xl); margin-bottom: var(--sp-3); }

  .header-rule::before,
  .header-rule::after { width: 40px; }

  /* AI hero */
  .ai-hero { margin-bottom: var(--sp-6); }
  .ai-diagnosis { padding: var(--sp-5); }
  .ai-diagnosis-header { margin-bottom: var(--sp-4); }
  .ai-form { gap: var(--sp-3); }

  /* Search wrapper — less bottom margin */
  .search-wrapper { margin-bottom: var(--sp-6); }

  /* Filter section — reduce vertical rhythm on mobile */
  .search-section {
    margin-bottom: var(--sp-6);
    padding-bottom: var(--sp-4);
  }

  .filter-group { margin-bottom: var(--sp-5); }

  .filter-label {
    font-size: 0.6rem;
    letter-spacing: 0.16em;
    margin-bottom: var(--sp-3);
    padding-bottom: var(--sp-2);
  }

  /* Region groups tighter on mobile */
  .region-group { margin-bottom: var(--sp-3); }
  .region-label { font-size: 0.6rem; margin-bottom: var(--sp-1); }
  .region-chips { gap: var(--sp-1); }
  .filter-chips { gap: var(--sp-1); }

  /* Filter chips — slightly smaller touch target but still comfortable */
  .filter-chip {
    padding: 0.25rem var(--sp-3);
    font-size: 0.7rem;
  }

  /* Results grid gap */
  .results-grid { gap: var(--sp-4); }
  .recipe-card { padding: var(--sp-5); }

  /* Footer */
  .footer { margin-top: var(--sp-8); }

  /* Modal — bottom sheet */
  .modal {
    padding: var(--sp-3);
    align-items: flex-end;
  }
  .modal-content {
    max-height: 92vh;
    padding: var(--sp-6);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    transform: translateY(40px);
  }
  .modal.active .modal-content { transform: translateY(0) scale(1); }

  /* Ingredient list — stack on mobile */
  .ingredients-list li {
    grid-template-columns: 1fr;
    gap: var(--sp-1);
  }
  .ingredient-amount { justify-self: start; }
}

/* ─────────────────────────────────────────────────────────────
   RESPONSIVE — SMALL PHONE
───────────────────────────────────────────────────────────── */
@media (max-width: 400px) {
  .container { padding: 4.5rem var(--sp-3) var(--sp-6); }
  .header { padding: 0 0 var(--sp-6) 0; margin-bottom: var(--sp-5); }
  .ai-diagnosis { padding: var(--sp-4); }
  .modal-content { padding: var(--sp-5); }
  .recipe-card { padding: var(--sp-4); }
}

/* ─────────────────────────────────────────────────────────────
   SCROLLBAR (global)
───────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-medium); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-tertiary); }
html { scrollbar-color: var(--border-medium) transparent; scrollbar-width: thin; }

/* ─────────────────────────────────────────────────────────────
   THEME TRANSITION (applied via JS after load)
───────────────────────────────────────────────────────────── */
.theme-ready,
.theme-ready .ai-diagnosis,
.theme-ready .recipe-card,
.theme-ready .filter-chip,
.theme-ready .search-input,
.theme-ready .modal-content,
.theme-ready .menu-toggle,
.theme-ready .theme-toggle {
  transition-property: background-color, border-color, color, box-shadow;
  transition-duration: 300ms;
  transition-timing-function: ease;
}