/* ============================================
   서울비디치과 Design System v1.0
   Bento UI + Glassmorphism + 토스형 미니멀
   ============================================ */

/* Pretendard 산세리프 - CDN으로 로드 */

/* ■ CSS Variables (Design Tokens) */
:root {
  /* Colors - Primary (Black Theme) */
  --color-primary: #111111;
  --color-primary-light: #2a2a2a;
  --color-primary-dark: #000000;
  --color-accent: #ffffff;
  
  /* Brand Colors - Brown/Gold Theme (서울비디치과) */
  --brand-primary: #8B5A2B;      /* 메인 브라운 */
  --brand-secondary: #A67C52;    /* 밝은 브라운 */
  --brand-dark: #5D3A1A;         /* 다크 브라운 */
  --brand-gold: #C9A962;         /* 골드 액센트 */
  --brand-light: #D4B896;        /* 라이트 베이지 */
  --brand-gradient: linear-gradient(135deg, #8B5A2B 0%, #C9A962 100%);
  --brand-gradient-dark: linear-gradient(135deg, #5D3A1A 0%, #8B5A2B 100%);
  
  /* Colors - Neutral (Dark Theme) */
  --color-white: #ffffff;
  --color-gray-50: #0a0a0a;
  --color-gray-100: #111111;
  --color-gray-200: #1a1a1a;
  --color-gray-300: #2a2a2a;
  --color-gray-400: #555555;
  --color-gray-500: #777777;
  --color-gray-600: #999999;
  --color-gray-700: #b3b3b3;
  --color-gray-800: #e5e5e5;
  --color-gray-900: #f5f5f5;
  
  /* Colors - Semantic */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;
  
  /* Glassmorphism (Dark Theme) */
  --glass-bg: rgba(20, 20, 20, 0.85);
  --glass-bg-dark: rgba(10, 10, 10, 0.9);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --glass-blur: blur(20px);
  
  /* Typography */
  --font-primary: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Pretendard', sans-serif;
  
  /* Font Sizes */
  --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;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  
  /* Font Weights */
  --font-light: 300;
  --font-regular: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  
  /* Letter Spacing */
  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;
  --tracking-wider: 0.05em;
  
  /* Line Heights */
  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.75;
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-3xl: 2rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
  --transition-slower: 500ms ease;
  
  /* Z-Index */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-tooltip: 600;
  
  /* Container */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1440px;
  
  /* Responsive Font Sizes (clamp) - v1.1 통합 */
  --font-size-display: clamp(2.5rem, 5vw + 1rem, 4.5rem);
  --font-size-h1: clamp(2rem, 4vw + 0.5rem, 3.5rem);
  --font-size-h2: clamp(1.75rem, 3vw + 0.5rem, 2.75rem);
  --font-size-h3: clamp(1.5rem, 2.5vw + 0.5rem, 2.25rem);
  --font-size-h4: clamp(1.25rem, 2vw + 0.25rem, 1.75rem);
  --font-size-h5: clamp(1.125rem, 1.5vw + 0.25rem, 1.5rem);
  --font-size-body-lg: clamp(1.0625rem, 1vw + 0.25rem, 1.25rem);
  --font-size-body: clamp(0.9375rem, 0.5vw + 0.5rem, 1.0625rem);
  --font-size-body-sm: clamp(0.8125rem, 0.5vw + 0.25rem, 0.9375rem);
  --font-size-caption: clamp(0.75rem, 0.25vw + 0.5rem, 0.875rem);
  --font-size-tiny: clamp(0.625rem, 0.25vw + 0.375rem, 0.75rem);
  
  /* Accessibility Colors - v1.1 통합 */
  --a11y-text-primary: #ffffff;
  --a11y-text-secondary: #d4c4b0;
  --a11y-text-muted: #b8a896;
  --a11y-brand-gold: #E5C77B;
  --a11y-focus-color: #E5C77B;
  --a11y-focus-outline: 3px solid #E5C77B;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: var(--font-regular);
  line-height: var(--leading-normal);
  color: var(--color-gray-800);
  background-color: #000000;
  letter-spacing: var(--tracking-wide);
  overflow-x: hidden;
}

/* ■ Typography Classes */
.text-display {
  font-size: var(--text-6xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
}

.text-h1 {
  font-size: var(--text-5xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
}

.text-h2 {
  font-size: var(--text-4xl);
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
}

.text-h3 {
  font-size: var(--text-3xl);
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
}

.text-h4 {
  font-size: var(--text-2xl);
  font-weight: var(--font-medium);
}

.text-body-lg {
  font-size: var(--text-lg);
  font-weight: var(--font-light);
}

.text-body {
  font-size: var(--text-base);
  font-weight: var(--font-light);
}

.text-body-sm {
  font-size: var(--text-sm);
  font-weight: var(--font-light);
}

.text-caption {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
}

/* ■ Container */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.container-lg {
  max-width: var(--container-2xl);
}

.container-sm {
  max-width: var(--container-lg);
}

/* ■ Glassmorphism Components */
.glass-card {
  background: rgba(20, 18, 16, 0.85);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid rgba(201, 169, 98, 0.15);
  border-radius: var(--radius-2xl);
  box-shadow: var(--glass-shadow);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.glass-card:hover {
  transform: scale(1.02);
  box-shadow: 0 12px 40px rgba(139, 90, 43, 0.2);
  border-color: rgba(201, 169, 98, 0.3);
}

.glass-card-premium {
  background: linear-gradient(145deg, rgba(30, 25, 20, 0.9) 0%, rgba(20, 18, 16, 0.95) 100%);
  border: 1px solid rgba(201, 169, 98, 0.2);
}

.glass-card-premium:hover {
  border-color: rgba(201, 169, 98, 0.4);
  box-shadow: 0 15px 50px rgba(139, 90, 43, 0.25);
}

.glass-card-dark {
  background: var(--glass-bg-dark);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-2xl);
}

/* ■ Bento Grid System */
.bento-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(4, 1fr);
}

.bento-cell {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.bento-cell:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-lg);
}

/* Bento Cell Sizes */
.bento-cell-1x1 { grid-column: span 1; grid-row: span 1; }
.bento-cell-2x1 { grid-column: span 2; grid-row: span 1; }
.bento-cell-1x2 { grid-column: span 1; grid-row: span 2; }
.bento-cell-2x2 { grid-column: span 2; grid-row: span 2; }
.bento-cell-3x1 { grid-column: span 3; grid-row: span 1; }
.bento-cell-3x2 { grid-column: span 3; grid-row: span 2; }
.bento-cell-4x1 { grid-column: span 4; grid-row: span 1; }

/* ■ Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  text-decoration: none;
  border: none;
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: all var(--transition-base);
  min-height: 44px;
  min-width: 44px;
}

.btn-primary {
  background: linear-gradient(135deg, #8B5A2B 0%, #C9A962 100%);
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(139, 90, 43, 0.4);
  font-weight: var(--font-semibold);
  border: none;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(139, 90, 43, 0.5);
  background: linear-gradient(135deg, #A67C52 0%, #D4B896 100%);
}

.btn-secondary {
  background: transparent;
  backdrop-filter: var(--glass-blur);
  color: #C9A962;
  border: 1px solid rgba(201, 169, 98, 0.5);
}

.btn-secondary:hover {
  background: rgba(139, 90, 43, 0.15);
  box-shadow: 0 4px 15px rgba(139, 90, 43, 0.2);
  border-color: #C9A962;
  color: #D4B896;
}

.btn-accent {
  background: rgba(139, 90, 43, 0.2);
  color: #D4B896;
  border: 1px solid rgba(201, 169, 98, 0.3);
}

.btn-accent:hover {
  background: rgba(139, 90, 43, 0.3);
  border-color: rgba(201, 169, 98, 0.5);
  color: #C9A962;
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
  border-radius: var(--radius-2xl);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
}

.btn-icon {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: var(--radius-full);
}

/* ■ Section Styles */
.section {
  padding: var(--space-20) 0;
}

.section-sm {
  padding: var(--space-12) 0;
}

.section-lg {
  padding: var(--space-24) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-title h2 {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.section-title p {
  font-size: var(--text-lg);
  color: var(--color-gray-500);
  font-weight: var(--font-light);
}

/* ■ Cards */
.card {
  background: var(--color-white);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.card-image {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
}

.card-content {
  padding: var(--space-6);
}

.card-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-2);
}

.card-desc {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  font-weight: var(--font-light);
}

/* ■ Tags & Badges */
.tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border-radius: var(--radius-full);
  background: var(--color-white);
  color: #000000;
}

.tag-outline {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: var(--color-white);
}

.tag-glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  color: var(--color-gray-700);
}

/* ■ FAQ Accordion */
.faq-item {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  margin-bottom: var(--space-3);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: var(--space-5);
  background: transparent;
  border: none;
  text-align: left;
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  color: var(--color-gray-800);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-answer {
  padding: 0 var(--space-5) var(--space-5);
  font-size: var(--text-base);
  color: var(--color-gray-600);
  line-height: var(--leading-relaxed);
  display: none;
}

.faq-item.active .faq-answer {
  display: block;
}

/* ■ Legal Notice */
.legal-notice {
  font-size: var(--text-xs);
  color: var(--color-gray-400);
  font-style: italic;
  padding: var(--space-4);
  background: var(--color-gray-100);
  border-radius: var(--radius-lg);
  margin-top: var(--space-6);
}

/* ■ Process Steps */
.process-steps {
  display: flex;
  gap: var(--space-4);
  overflow-x: auto;
  padding: var(--space-4) 0;
}

.process-step {
  flex: 0 0 auto;
  width: 200px;
  text-align: center;
  padding: var(--space-6);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-2xl);
}

.process-step-number {
  width: 40px;
  height: 40px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-bold);
  margin: 0 auto var(--space-4);
}

/* ■ Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--color-white); }
.text-gray { color: var(--color-gray-500); }
.text-dark { color: var(--color-white); }
.text-white { color: var(--color-white); }

.bg-white { background: #0f0f0f; }
.bg-gray { background: #000000; }
.bg-gradient {
  background: linear-gradient(135deg, #1a1a1a 0%, #0a0a0a 100%);
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

.hidden { display: none; }
.block { display: block; }

/* ■ Navigation Highlight Utilities */
.nav-highlight {
  color: #C9A962 !important;
  font-weight: 600 !important;
}

.badge-hot {
  display: inline-block;
  background: linear-gradient(135deg, #C9A962, #8B5A2B);
  color: #fff;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  margin-left: 6px;
  vertical-align: middle;
}

/* ■ Header Spacer */
.header-spacer {
  height: 72px;
}

/* ■ Hero Utilities */
.hero-subtitle-styled {
  font-family: 'Pretendard', -apple-system, sans-serif;
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  color: rgba(255,255,255,0.95);
  letter-spacing: 0.1em;
  margin-bottom: 24px;
  font-weight: 400;
  text-shadow: 0 4px 20px rgba(0,0,0,0.5);
}

.hero-title-styled {
  font-family: 'Pretendard', -apple-system, sans-serif;
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 40px;
  letter-spacing: 0.02em;
}

.hero-badges-styled {
  margin-bottom: 32px;
}

/* ■ Hero Background Utilities */
.hero-bg-overlay {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero-grid-pattern {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(201, 169, 98, 0.03) 1px, transparent 1px), 
                    linear-gradient(90deg, rgba(201, 169, 98, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
  z-index: 0;
}

/* ■ Chart Bar Variable */
.chart-bar {
  width: var(--value, 50%);
}

/* ■ Responsive Breakpoints */
@media (max-width: 1024px) {
  .bento-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .bento-cell-3x1,
  .bento-cell-3x2,
  .bento-cell-4x1 {
    grid-column: span 2;
  }
  
  .text-display {
    font-size: var(--text-5xl);
  }
  
  .text-h1 {
    font-size: var(--text-4xl);
  }
  
  .text-h2 {
    font-size: var(--text-3xl);
  }
}

@media (max-width: 768px) {
  :root {
    --text-base: 1rem;
  }
  
  .bento-grid {
    grid-template-columns: 1fr;
  }
  
  .bento-cell-2x1,
  .bento-cell-2x2,
  .bento-cell-3x1,
  .bento-cell-3x2,
  .bento-cell-4x1 {
    grid-column: span 1;
  }
  
  .bento-cell-1x2,
  .bento-cell-2x2,
  .bento-cell-3x2 {
    grid-row: span 1;
  }
  
  .text-display {
    font-size: var(--text-4xl);
  }
  
  .text-h1 {
    font-size: var(--text-3xl);
  }
  
  .text-h2 {
    font-size: var(--text-2xl);
  }
  
  .section {
    padding: var(--space-12) 0;
  }
  
  .container {
    padding: 0 var(--space-4);
  }
  
  .process-steps {
    flex-direction: column;
  }
  
  .process-step {
    width: 100%;
  }
}

/* ■ Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
}

.animate-fade-in {
  animation: fadeIn 0.4s ease forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }