/* ==========================================================================
   Re:Solution Optics Japan / España - Global Accessible Stylesheet
   WCAG 2.1 AA/AAA Compliant Architecture
   Standards: JIS Z 8722 / European Optical Medical Devices Regulation
   ========================================================================== */

:root {
  /* Color Palette - Japanese Precision Navy & Gold/Crimson Accents */
  --color-primary: #0a192f;
  --color-primary-light: #172a45;
  --color-primary-dark: #020c1b;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-japanese-crimson: #c8102e;
  --color-gold: #b45309;
  --color-gold-light: #fef3c7;
  
  /* Neutral Surfaces & Text (High Contrast Ratios >= 7:1 for Body Text) */
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-subtle: #f1f5f9;
  --color-border: #cbd5e1;
  --color-border-focus: #2563eb;
  
  --color-text-main: #0f172a;
  --color-text-muted: #334155;
  --color-text-inverse: #ffffff;
  
  /* Status Colors */
  --color-success: #15803d;
  --color-success-bg: #dcfce7;
  --color-warning: #b45309;
  --color-warning-bg: #fef3c7;
  --color-info: #0369a1;
  --color-info-bg: #e0f2fe;

  /* Typography & Scaling */
  --font-family-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --font-family-serif: "Georgia", Cambria, "Times New Roman", Times, serif;
  --font-scale: 1;
  --font-size-base: calc(1rem * var(--font-scale));
  --line-height-base: 1.6;
  --letter-spacing-base: 0.015em;

  /* Spacing & Layout */
  --container-max-width: 1240px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.15), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Focus Indicator standard */
  --focus-outline-width: 3px;
  --focus-outline-color: #2563eb;
  --focus-outline-offset: 3px;
  
  --transition-speed: 0.2s;
}

/* ==========================================================================
   HIGH CONTRAST MODE (WCAG AAA - #000000 Background, #FFD700 Yellow Text)
   ========================================================================== */
html[data-contrast="high"] {
  --color-primary: #000000 !important;
  --color-primary-light: #111111 !important;
  --color-primary-dark: #000000 !important;
  --color-accent: #ffd700 !important;
  --color-accent-hover: #ffea00 !important;
  --color-japanese-crimson: #ffd700 !important;
  --color-gold: #ffd700 !important;
  --color-gold-light: #000000 !important;

  --color-bg: #000000 !important;
  --color-surface: #000000 !important;
  --color-surface-subtle: #121212 !important;
  --color-border: #ffd700 !important;
  --color-border-focus: #ffffff !important;

  --color-text-main: #ffd700 !important;
  --color-text-muted: #ffffff !important;
  --color-text-inverse: #000000 !important;

  --color-success: #00ff66 !important;
  --color-success-bg: #000000 !important;
  --color-warning: #ffd700 !important;
  --color-warning-bg: #000000 !important;
  --color-info: #00ffff !important;
  --color-info-bg: #000000 !important;

  --focus-outline-width: 4px !important;
  --focus-outline-color: #ffd700 !important;
  --focus-outline-offset: 4px !important;
}

html[data-contrast="high"] * {
  box-shadow: none !important;
  text-shadow: none !important;
}

html[data-contrast="high"] .btn-primary,
html[data-contrast="high"] .btn-accent,
html[data-contrast="high"] .badge-primary {
  background-color: #ffd700 !important;
  color: #000000 !important;
  border: 2px solid #ffffff !important;
  font-weight: 800 !important;
}

html[data-contrast="high"] .btn-secondary,
html[data-contrast="high"] .btn-outline {
  background-color: #000000 !important;
  color: #ffd700 !important;
  border: 2px solid #ffd700 !important;
  font-weight: 700 !important;
}

html[data-contrast="high"] table th {
  background-color: #ffd700 !important;
  color: #000000 !important;
}

/* ==========================================================================
   CSS Reset & Base Rules
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  letter-spacing: var(--letter-spacing-base);
  color: var(--color-text-main);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Respect user's motion preferences */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Skip to Content Accessible Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--color-accent);
  color: var(--color-text-inverse);
  padding: 0.75rem 1.5rem;
  z-index: 99999;
  font-weight: 700;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: top 0.2s ease-in-out;
}

.skip-link:focus {
  top: 1rem;
  outline: var(--focus-outline-width) solid #ffffff;
  outline-offset: 2px;
}

/* Universal Focus Outline for Keyboard Navigation */
:focus-visible {
  outline: var(--focus-outline-width) solid var(--focus-outline-color);
  outline-offset: var(--focus-outline-offset);
}

/* Layout Container */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

/* Typography Elements */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-primary);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 0.75rem;
}

h1 { font-size: calc(2.25rem * var(--font-scale)); }
h2 { font-size: calc(1.75rem * var(--font-scale)); }
h3 { font-size: calc(1.35rem * var(--font-scale)); }
h4 { font-size: calc(1.15rem * var(--font-scale)); }

p {
  margin-bottom: 1rem;
  color: var(--color-text-muted);
}

a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition-speed);
}

a:hover {
  color: var(--color-accent-hover);
}

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

/* ==========================================================================
   Persistent Accessibility Bar (Top)
   ========================================================================== */
.a11y-toolbar {
  background-color: var(--color-primary-dark);
  color: #ffffff;
  font-size: calc(0.85rem * var(--font-scale));
  padding: 0.45rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.a11y-toolbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.a11y-toolbar-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.a11y-btn {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 0.25rem 0.65rem;
  font-size: calc(0.85rem * var(--font-scale));
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-height: 36px;
  min-width: 36px;
  justify-content: center;
}

.a11y-btn:hover {
  background: rgba(255, 255, 255, 0.25);
  border-color: #ffffff;
}

.a11y-phone-link {
  color: #fef08a;
  text-decoration: none;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
}

.a11y-phone-link:hover {
  color: #ffffff;
  text-decoration: underline;
}

/* ==========================================================================
   Main Header & Navigation
   ========================================================================== */
.site-header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 0.85rem;
  padding-bottom: 0.85rem;
}

.brand-wrapper {
  display: flex;
  flex-direction: column;
  text-decoration: none;
}

.brand-logo-text {
  font-size: calc(1.4rem * var(--font-scale));
  font-weight: 800;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.brand-dot {
  color: var(--color-japanese-crimson);
  font-size: 1.6rem;
  line-height: 0;
}

.brand-subtext {
  font-size: calc(0.7rem * var(--font-scale));
  color: var(--color-text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-shrink: 0;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 1.25rem;
  align-items: center;
  flex-wrap: nowrap;
}

.nav-link {
  color: var(--color-text-main);
  text-decoration: none;
  font-weight: 600;
  font-size: calc(0.95rem * var(--font-scale));
  padding: 0.5rem 0.25rem;
  position: relative;
  transition: color var(--transition-speed);
  white-space: nowrap;
  display: inline-block;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-accent);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: var(--color-accent);
  border-radius: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.cart-toggle-btn {
  background-color: var(--color-surface-subtle);
  color: var(--color-text-main);
  border: 1px solid var(--color-border);
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: calc(0.9rem * var(--font-scale));
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 44px;
}

.cart-toggle-btn:hover {
  background-color: var(--color-border);
}

.cart-count-badge {
  background-color: var(--color-japanese-crimson);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.15rem 0.45rem;
  border-radius: 9999px;
  min-width: 20px;
  text-align: center;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.5rem;
  min-width: 44px;
  min-height: 44px;
  cursor: pointer;
  color: var(--color-text-main);
}

/* ==========================================================================
   Buttons & UI Elements
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: calc(0.95rem * var(--font-scale));
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-speed);
  min-height: 48px;
  text-align: center;
  border: 2px solid transparent;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

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

.btn-accent {
  background-color: var(--color-accent);
  color: #ffffff;
  border-color: var(--color-accent);
}

.btn-accent:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #ffffff;
}

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-primary);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-surface-subtle);
  border-color: var(--color-primary);
}

.btn-outline-white {
  background: transparent;
  color: #ffffff;
  border-color: #ffffff;
}

.btn-outline-white:hover {
  background: #ffffff;
  color: var(--color-primary);
}

.btn-sm {
  padding: 0.4rem 0.8rem;
  font-size: calc(0.85rem * var(--font-scale));
  min-height: 38px;
}

.btn-lg {
  padding: 0.95rem 1.8rem;
  font-size: calc(1.1rem * var(--font-scale));
  min-height: 52px;
}

.btn-block {
  width: 100%;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  border-radius: 9999px;
  font-size: calc(0.75rem * var(--font-scale));
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-japanese {
  background-color: #fef2f2;
  color: var(--color-japanese-crimson);
  border: 1px solid #fecaca;
}

.badge-success {
  background-color: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid #bbf7d0;
}

.badge-info {
  background-color: var(--color-info-bg);
  color: var(--color-info);
  border: 1px solid #bae6fd;
}

.badge-warning {
  background-color: var(--color-warning-bg);
  color: var(--color-warning);
  border: 1px solid #fde68a;
}

/* Visual Context Badges for Low-Vision & Accessibility */
.visual-transcript-tag {
  background-color: var(--color-surface-subtle);
  border: 1px dashed var(--color-border);
  color: var(--color-text-muted);
  font-size: calc(0.75rem * var(--font-scale));
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.4rem;
}

/* ==========================================================================
   Trust Ribbons & Disclaimers
   ========================================================================== */
.trust-ribbon {
  background: linear-gradient(135deg, #0a192f 0%, #1e3a8a 100%);
  color: #ffffff;
  padding: 1.25rem 0;
  border-bottom: 2px solid #3b82f6;
}

.trust-ribbon-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  align-items: center;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.trust-icon {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.trust-title {
  font-size: calc(0.85rem * var(--font-scale));
  font-weight: 800;
  color: #ffffff;
  margin: 0;
  line-height: 1.2;
}

.trust-subtitle {
  font-size: calc(0.75rem * var(--font-scale));
  color: #cbd5e1;
  margin: 0;
}

.clinical-disclaimer-box {
  background-color: #f8fafc;
  border-left: 5px solid #2563eb;
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 1.5rem 0;
}

.clinical-disclaimer-box.warning {
  border-left-color: var(--color-warning);
  background-color: var(--color-warning-bg);
}

.clinical-disclaimer-box p {
  margin: 0;
  font-size: calc(0.9rem * var(--font-scale));
  color: var(--color-text-main);
  font-weight: 500;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  background: linear-gradient(180deg, #ffffff 0%, #f1f5f9 100%);
  padding: 4rem 0 3.5rem;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: center;
}

.hero-title {
  font-size: calc(2.75rem * var(--font-scale));
  color: var(--color-primary);
  line-height: 1.15;
  margin-bottom: 1.25rem;
}

.hero-subtitle {
  font-size: calc(1.15rem * var(--font-scale));
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 2rem;
}

.hero-cta-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-xl);
}

.hero-badge-row {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

/* ==========================================================================
   Sections & Cards
   ========================================================================== */
.section {
  padding: 4rem 0;
}

.section-subtle {
  background-color: var(--color-surface-subtle);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 3rem;
}

.section-tag {
  color: var(--color-accent);
  font-size: calc(0.85rem * var(--font-scale));
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
  display: block;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-speed), box-shadow var(--transition-speed), border-color var(--transition-speed);
}

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

.card-media {
  background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 150px;
  position: relative;
  overflow: hidden;
}

.card-media svg {
  max-width: 100%;
  height: auto;
  filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.05));
  transition: transform var(--transition-speed) ease;
}

.card:hover .card-media svg {
  transform: scale(1.04);
}

.card-title {
  font-size: calc(1.2rem * var(--font-scale));
  font-weight: 700;
  margin-bottom: 0.4rem;
  line-height: 1.25;
}

.card-desc {
  font-size: calc(0.88rem * var(--font-scale));
  color: var(--color-text-muted);
  line-height: 1.5;
  margin-bottom: 0.75rem;
  flex: 1;
}

.card-price {
  font-size: calc(1.4rem * var(--font-scale));
  font-weight: 800;
  color: var(--color-primary);
  margin: 0.75rem 0 1rem;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.card-price-tax {
  font-size: calc(0.8rem * var(--font-scale));
  font-weight: 500;
  color: var(--color-text-muted);
  white-space: nowrap;
}

/* ==========================================================================
   Product Catalog & Specs Tables
   ========================================================================== */
.product-filter-bar {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
  justify-content: center;
}

.filter-btn {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-main);
  padding: 0.6rem 1.2rem;
  border-radius: 9999px;
  font-weight: 700;
  font-size: calc(0.9rem * var(--font-scale));
  cursor: pointer;
  min-height: 44px;
}

.filter-btn:hover,
.filter-btn.active {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

.product-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
}

.diopter-selector-wrap {
  margin: 1rem 0;
}

.diopter-label {
  display: block;
  font-size: calc(0.85rem * var(--font-scale));
  font-weight: 700;
  margin-bottom: 0.35rem;
  color: var(--color-text-main);
}

.diopter-select {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  color: var(--color-text-main);
  font-size: calc(0.9rem * var(--font-scale));
  min-height: 44px;
}

/* Technical Specification Tables (JIS Compliant) */
.specs-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: calc(0.85rem * var(--font-scale));
}

.specs-table th,
.specs-table td {
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  text-align: left;
}

.specs-table th {
  background-color: var(--color-surface-subtle);
  font-weight: 700;
  color: var(--color-primary);
  width: 35%;
}

.specs-table td {
  color: var(--color-text-muted);
}

/* ==========================================================================
   Vision Quiz Module (test-visual.html)
   ========================================================================== */
.quiz-container {
  max-width: 820px;
  margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
}

.quiz-progress {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--color-border);
}

.quiz-step-indicator {
  font-weight: 800;
  color: var(--color-accent);
  font-size: calc(0.95rem * var(--font-scale));
}

.tts-button {
  background-color: var(--color-surface-subtle);
  border: 2px solid var(--color-border);
  color: var(--color-primary);
  font-weight: 700;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 48px;
  font-size: calc(0.9rem * var(--font-scale));
  transition: all var(--transition-speed);
}

.tts-button:hover {
  background-color: #e0f2fe;
  border-color: var(--color-accent);
}

.quiz-question-title {
  font-size: calc(1.5rem * var(--font-scale));
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.quiz-question-desc {
  font-size: calc(1rem * var(--font-scale));
  color: var(--color-text-muted);
  margin-bottom: 1.75rem;
}

.quiz-options-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

/* High-contrast, min 70px touch tiles */
.quiz-option-card {
  min-height: 72px;
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  cursor: pointer;
  text-align: left;
  transition: all var(--transition-speed);
  position: relative;
  font-size: calc(1.05rem * var(--font-scale));
  font-weight: 600;
  color: var(--color-text-main);
  width: 100%;
}

.quiz-option-card:hover {
  border-color: var(--color-accent);
  background-color: var(--color-surface-subtle);
}

.quiz-option-card:focus-visible {
  outline: 4px solid #2563eb !important;
  outline-offset: 3px !important;
}

.quiz-option-card.selected {
  border-color: var(--color-accent);
  background-color: #eff6ff;
  border-width: 3px;
  color: #1e3a8a;
  font-weight: 700;
}

.quiz-option-card.selected::after {
  content: "✓";
  position: absolute;
  right: 1.5rem;
  font-size: 1.4rem;
  color: var(--color-accent);
  font-weight: 900;
}

.quiz-navigation-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

/* Result Recommendation Card */
.recommendation-card {
  background: linear-gradient(135deg, #eff6ff 0%, #ffffff 100%);
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-top: 2rem;
}

/* ==========================================================================
   FAQ Accordion (revision.html & institutional)
   ========================================================================== */
.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  overflow: hidden;
}

.faq-header-btn {
  width: 100%;
  padding: 1.25rem 1.5rem;
  background: none;
  border: none;
  text-align: left;
  font-size: calc(1.05rem * var(--font-scale));
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  min-height: 60px;
}

.faq-header-btn:hover {
  background-color: var(--color-surface-subtle);
}

.faq-icon {
  font-size: 1.3rem;
  transition: transform var(--transition-speed);
  flex-shrink: 0;
}

.faq-header-btn[aria-expanded="true"] .faq-icon {
  transform: rotate(180deg);
}

.faq-content {
  padding: 0 1.5rem 1.5rem;
  color: var(--color-text-muted);
  font-size: calc(0.95rem * var(--font-scale));
  line-height: 1.6;
}

/* ==========================================================================
   Booking Form (cita.html)
   ========================================================================== */
.form-container {
  max-width: 760px;
  margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-weight: 700;
  font-size: calc(0.95rem * var(--font-scale));
  margin-bottom: 0.4rem;
  color: var(--color-text-main);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: calc(1rem * var(--font-scale));
  color: var(--color-text-main);
  background-color: var(--color-surface);
  min-height: 48px;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-border-focus);
}

.checkbox-wrap {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  cursor: pointer;
}

.checkbox-wrap input[type="checkbox"] {
  width: 20px;
  height: 20px;
  margin-top: 0.2rem;
  flex-shrink: 0;
  accent-color: var(--color-accent);
}

.checkbox-label {
  font-size: calc(0.85rem * var(--font-scale));
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   Shopping Cart Drawer (Global)
   ========================================================================== */
.cart-drawer-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  z-index: 10000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-speed);
  backdrop-filter: blur(2px);
}

.cart-drawer-overlay.active {
  opacity: 1;
  visibility: visible;
}

.cart-drawer {
  position: fixed;
  top: 0;
  right: -480px;
  width: 100%;
  max-width: 440px;
  height: 100%;
  background: var(--color-surface);
  z-index: 10001;
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
  transition: right 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.cart-drawer.active {
  right: 0;
}

.cart-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--color-surface-subtle);
}

.cart-close-btn {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.4rem;
  cursor: pointer;
  font-size: 1.25rem;
  min-width: 40px;
  min-height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-main);
}

.cart-items-body {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.cart-item {
  display: flex;
  gap: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.cart-item-details {
  flex: 1;
}

.cart-item-name {
  font-weight: 700;
  font-size: calc(0.95rem * var(--font-scale));
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}

.cart-item-meta {
  font-size: calc(0.8rem * var(--font-scale));
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}

.cart-item-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.qty-btn {
  background: var(--color-surface-subtle);
  border: 1px solid var(--color-border);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.remove-btn {
  background: none;
  border: none;
  color: var(--color-japanese-crimson);
  font-size: calc(0.75rem * var(--font-scale));
  cursor: pointer;
  text-decoration: underline;
  margin-left: auto;
}

.cart-footer {
  padding: 1.5rem;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface-subtle);
}

.cart-summary-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  font-size: calc(0.9rem * var(--font-scale));
  color: var(--color-text-muted);
}

.cart-summary-row.total {
  font-size: calc(1.2rem * var(--font-scale));
  font-weight: 800;
  color: var(--color-primary);
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--color-border);
}

/* ==========================================================================
   Mobile Bottom Bar (Fixed)
   ========================================================================== */
.mobile-bottom-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -4px 6px -1px rgba(0, 0, 0, 0.05);
  z-index: 9000;
  padding: 0.35rem 0.5rem;
}

.mobile-bottom-nav {
  display: flex;
  justify-content: space-around;
  align-items: center;
}

.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 54px;
  min-height: 48px;
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: calc(0.7rem * var(--font-scale));
  font-weight: 600;
  gap: 0.2rem;
  background: none;
  border: none;
  cursor: pointer;
  position: relative;
}

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

.mobile-nav-icon {
  font-size: 1.25rem;
}

.mobile-badge {
  position: absolute;
  top: 2px;
  right: 8px;
  background: var(--color-japanese-crimson);
  color: #ffffff;
  font-size: 0.65rem;
  font-weight: 800;
  padding: 0.1rem 0.35rem;
  border-radius: 9999px;
}

/* ==========================================================================
   Site Footer
   ========================================================================== */
.site-footer {
  background-color: var(--color-primary-dark);
  color: #94a3b8;
  font-size: calc(0.85rem * var(--font-scale));
  padding: 4rem 0 2rem;
  margin-top: auto;
  border-top: 3px solid var(--color-accent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-col-title {
  color: #ffffff;
  font-size: calc(1rem * var(--font-scale));
  font-weight: 700;
  margin-bottom: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-link {
  color: #94a3b8;
  text-decoration: none;
  transition: color var(--transition-speed);
}

.footer-link:hover {
  color: #ffffff;
  text-decoration: underline;
}

.footer-corporate-box {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-top: 1rem;
}

.footer-corporate-title {
  color: #f8fafc;
  font-weight: 700;
  margin-bottom: 0.35rem;
  font-size: calc(0.9rem * var(--font-scale));
}

.footer-corporate-text {
  font-size: calc(0.75rem * var(--font-scale));
  color: #cbd5e1;
  line-height: 1.5;
  margin: 0;
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ==========================================================================
   Screen Reader & Toast Utility Classes
   ========================================================================== */
.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;
}

.toast-container {
  position: fixed;
  bottom: 5rem;
  right: 1.5rem;
  z-index: 11000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.toast {
  background: var(--color-primary);
  color: #ffffff;
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: calc(0.9rem * var(--font-scale));
  font-weight: 600;
  border-left: 4px solid var(--color-accent);
  pointer-events: auto;
  animation: slideInToast 0.3s ease-out;
}

@keyframes slideInToast {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 1220px) and (min-width: 993px) {
  .nav-list {
    gap: 0.75rem;
  }
  .nav-link {
    font-size: calc(0.88rem * var(--font-scale));
    padding: 0.4rem 0.2rem;
  }
  .brand-logo-text {
    font-size: calc(1.25rem * var(--font-scale));
  }
  .primary-nav {
    gap: 0.75rem;
  }
}

/* ==========================================================================
   Mobile & Tablet Responsive Layout (< 992px)
   ========================================================================== */
@media (max-width: 992px) {
  body {
    padding-bottom: 76px; /* Safe space for fixed mobile bottom bar */
  }

  .mobile-bottom-bar {
    display: block;
  }

  .mobile-menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .primary-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--color-surface);
    border-bottom: 2px solid var(--color-accent);
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow-xl);
    flex-direction: column;
    align-items: stretch;
    z-index: 1001;
  }

  .primary-nav.active {
    display: flex;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.35rem;
  }

  .nav-link {
    padding: 0.75rem 0.5rem;
    font-size: 1.05rem;
    border-bottom: 1px solid var(--color-surface-subtle);
  }

  .grid-4, .grid-3, .grid-2 {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .hero {
    padding: 2rem 0;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

/* ==========================================================================
   Dedicated Mobile Smartphone UX (< 768px)
   ========================================================================== */
@media (max-width: 768px) {
  /* 1. Compact Single-Line Accessibility Toolbar (100% visible phone number) */
  .a11y-toolbar {
    padding: 0.3rem 0;
    overflow: hidden;
  }

  .a11y-toolbar .container {
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: space-between;
    align-items: center;
    overflow: visible;
    gap: 0.25rem;
    padding-left: 0.5rem;
    padding-right: 0.5rem;
  }

  .a11y-toolbar-group {
    flex-wrap: nowrap;
    gap: 0.2rem;
    flex-shrink: 0;
  }

  .a11y-label,
  .a11y-divider,
  .a11y-phone-text,
  .btn-text-desktop,
  #font-reset-btn {
    display: none !important;
  }

  .a11y-btn {
    padding: 0.2rem 0.35rem;
    font-size: 0.75rem;
    min-height: 30px;
    min-width: 30px;
  }

  .a11y-phone-link {
    font-size: 0.82rem !important;
    font-weight: 800 !important;
    padding: 0.2rem 0.25rem;
    white-space: nowrap !important;
    flex-shrink: 0 !important;
    margin-left: auto;
    color: #fef08a !important;
  }

  .a11y-phone-num {
    font-weight: 800 !important;
    letter-spacing: 0.02em;
  }

  /* 2. Sleek Header & Uncut Controls */
  .site-header {
    padding: 0.4rem 0;
  }

  .site-header .container {
    padding-left: 0.5rem;
    padding-right: 0.5rem;
    gap: 0.35rem;
    flex-wrap: nowrap;
    justify-content: space-between;
    align-items: center;
  }

  .brand-wrapper {
    flex: 1 1 auto;
    min-width: 0;
    overflow: hidden;
  }

  .brand-logo-text {
    font-size: 0.98rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    letter-spacing: -0.01em;
    line-height: 1.2;
  }

  .brand-dot {
    font-size: 1.1rem;
  }

  .brand-subtext {
    font-size: 0.56rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    letter-spacing: 0.03em;
    line-height: 1.2;
  }

  .header-actions {
    gap: 0.35rem;
    flex-shrink: 0;
    display: flex;
    align-items: center;
  }

  .cart-toggle-btn {
    padding: 0.3rem 0.5rem;
    font-size: 0.78rem;
    min-height: 38px;
    gap: 0.2rem;
    flex-shrink: 0;
  }

  .cart-label-text {
    display: none !important;
  }

  .mobile-menu-toggle {
    min-width: 38px;
    min-height: 38px;
    font-size: 1.25rem;
    padding: 0;
    margin: 0;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
  }

  /* 3. Safe, 100% Non-Overlapping Mobile Trust Ribbon */
  .trust-ribbon {
    padding: 0.75rem 0;
  }

  .trust-ribbon-content {
    display: flex !important;
    flex-direction: column !important;
    gap: 0.55rem !important;
  }

  .trust-item {
    display: flex !important;
    align-items: center !important;
    gap: 0.65rem !important;
    width: 100% !important;
    min-width: 0 !important;
  }

  .trust-item > div:not(.trust-icon) {
    min-width: 0 !important;
    flex: 1 1 auto !important;
  }

  .trust-icon {
    width: 30px !important;
    height: 30px !important;
    font-size: 1rem !important;
    flex-shrink: 0 !important;
  }

  .trust-title {
    font-size: 0.82rem !important;
    font-weight: 800 !important;
    line-height: 1.25 !important;
    white-space: normal !important;
    word-break: normal !important;
    overflow: visible !important;
    text-overflow: clip !important;
    margin: 0 !important;
  }

  .trust-subtitle {
    font-size: 0.72rem !important;
    color: #cbd5e1 !important;
    line-height: 1.25 !important;
    white-space: normal !important;
    word-break: normal !important;
    overflow: visible !important;
    text-overflow: clip !important;
    margin: 0.1rem 0 0 0 !important;
  }

  /* 4. Hero Section Mobile Optimization */
  .hero {
    padding: 1.5rem 0 2rem;
  }

  .hero-badge-row {
    gap: 0.35rem;
    margin-bottom: 0.85rem;
    flex-wrap: wrap;
  }

  .hero-badge-row .badge {
    font-size: 0.68rem;
    padding: 0.2rem 0.5rem;
  }

  .hero-title {
    font-size: 1.6rem !important;
    line-height: 1.2;
    margin-bottom: 0.85rem;
  }

  .hero-subtitle {
    font-size: 0.95rem;
    line-height: 1.5;
    margin-bottom: 1.25rem;
  }

  .hero-cta-group {
    flex-direction: column;
    gap: 0.65rem;
  }

  .hero-cta-group .btn {
    width: 100%;
    min-height: 48px;
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
  }

  .hero-card {
    padding: 1.25rem;
    margin-top: 1rem;
  }

  /* 4b. Product Showcase Mobile Layout (100% full-width, clean typography, no squished cards) */
  .grid-4, .grid-3, .grid-2 {
    grid-template-columns: 1fr !important;
    gap: 1.25rem !important;
  }

  .card, .product-card {
    padding: 1.25rem 1rem !important;
    border-radius: var(--radius-lg) !important;
    box-shadow: var(--shadow-sm) !important;
  }

  .card-media {
    min-height: 130px !important;
    padding: 0.85rem !important;
    margin-bottom: 0.85rem !important;
  }

  .card-title {
    font-size: 1.18rem !important;
    line-height: 1.3 !important;
    margin-bottom: 0.35rem !important;
  }

  .card-desc {
    font-size: 0.88rem !important;
    line-height: 1.5 !important;
    margin-bottom: 0.65rem !important;
  }

  .card-price {
    font-size: 1.35rem !important;
    margin: 0.65rem 0 0.85rem !important;
    display: flex !important;
    align-items: baseline !important;
    gap: 0.45rem !important;
    flex-wrap: nowrap !important;
  }

  .card-price-tax {
    font-size: 0.8rem !important;
    white-space: nowrap !important;
  }

  .visual-transcript-tag {
    font-size: 0.78rem !important;
    padding: 0.35rem 0.6rem !important;
    margin: 0.4rem 0 0.65rem 0 !important;
    display: flex !important;
    flex-wrap: wrap !important;
  }

  .btn-block {
    width: 100% !important;
    white-space: nowrap !important;
    min-height: 48px !important;
    font-size: 0.95rem !important;
    padding: 0.75rem 1rem !important;
  }

  /* 5. Mobile Product Catalog & Horizontal Scroll Filters */
  .product-filter-bar {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    justify-content: flex-start;
    padding-bottom: 0.6rem;
    margin-bottom: 1.5rem;
    gap: 0.5rem;
  }

  .filter-btn {
    white-space: nowrap;
    font-size: 0.82rem;
    padding: 0.45rem 0.9rem;
    min-height: 38px;
    flex-shrink: 0;
  }

  .specs-table {
    display: block;
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  /* 6. Forms on Mobile (Prevent iOS Auto-Zoom on inputs) */
  .form-container {
    padding: 1.25rem 1rem;
  }

  .form-input,
  .form-select,
  .form-textarea {
    font-size: 16px !important; /* Prevents auto-zoom on mobile Safari */
  }

  /* 7. Quiz Options on Mobile */
  .quiz-container {
    padding: 1.25rem 1rem;
  }

  .quiz-option-card {
    min-height: 64px;
    padding: 0.85rem 1rem;
    font-size: 0.95rem;
  }

  .quiz-navigation-footer {
    flex-direction: column-reverse;
    gap: 0.75rem;
  }

  .quiz-navigation-footer .btn {
    width: 100%;
  }

  /* 8. Fixed Mobile Bottom Bar Safe Area */
  .mobile-bottom-bar {
    padding-bottom: max(0.4rem, env(safe-area-inset-bottom, 12px));
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
  }
}