/* 영이네컴퓨터 공방 - 2024 Modern CSS Framework */

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

/* ==================== CSS CUSTOM PROPERTIES (Design Tokens) ==================== */
:root {
  /* Colors - Light Mode */
  --color-primary-50: #eff6ff;
  --color-primary-100: #dbeafe;
  --color-primary-200: #bfdbfe;
  --color-primary-300: #93c5fd;
  --color-primary-400: #60a5fa;
  --color-primary-500: #3b82f6;
  --color-primary-600: #2563eb;
  --color-primary-700: #1d4ed8;
  --color-primary-800: #1e40af;
  --color-primary-900: #1e3a8a;

  --color-secondary-50: #faf5ff;
  --color-secondary-100: #f3e8ff;
  --color-secondary-200: #e9d5ff;
  --color-secondary-300: #d8b4fe;
  --color-secondary-400: #c084fc;
  --color-secondary-500: #a855f7;
  --color-secondary-600: #9333ea;
  --color-secondary-700: #7c3aed;
  --color-secondary-800: #6b21a8;
  --color-secondary-900: #581c87;

  /* Semantic Colors */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #06b6d4;

  /* Gray Scale */
  --color-gray-50: #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-500: #64748b;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1e293b;
  --color-gray-900: #0f172a;

  /* Typography */
  --font-family-sans: 'Pretendard Variable', 'Pretendard', 'Inter', system-ui, -apple-system, sans-serif;
  --font-family-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --font-family-display: 'Inter', system-ui, sans-serif;

  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  /* Font Sizes (Type Scale - Major Third 1.25) */
  --text-xs: 0.75rem;    /* 12px */
  --text-sm: 0.875rem;   /* 14px */
  --text-base: 1rem;     /* 16px */
  --text-lg: 1.125rem;   /* 18px */
  --text-xl: 1.25rem;    /* 20px */
  --text-2xl: 1.5rem;    /* 24px */
  --text-3xl: 1.875rem;  /* 30px */
  --text-4xl: 2.25rem;   /* 36px */
  --text-5xl: 3rem;      /* 48px */
  --text-6xl: 3.75rem;   /* 60px */
  --text-7xl: 4.5rem;    /* 72px */

  /* Spacing Scale (8pt Grid) */
  --space-px: 1px;
  --space-0: 0;
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */
  --space-32: 8rem;     /* 128px */

  /* Border Radius */
  --radius-sm: 0.125rem;  /* 2px */
  --radius-md: 0.375rem;  /* 6px */
  --radius-lg: 0.5rem;    /* 8px */
  --radius-xl: 0.75rem;   /* 12px */
  --radius-2xl: 1rem;     /* 16px */
  --radius-3xl: 1.5rem;   /* 24px */
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-Index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-toast: 1080;
}

/* Dark Mode Variables - Disabled */
@media (prefers-color-scheme: never) {
  :root {
    --color-background: var(--color-gray-900);
    --color-surface: var(--color-gray-800);
    --color-text-primary: var(--color-gray-100);
    --color-text-secondary: var(--color-gray-300);
    --color-text-muted: var(--color-gray-400);
    --color-border: var(--color-gray-700);
    
    /* 글래스 효과 다크 모드 버전 */
    --glass-bg: rgba(15, 23, 42, 0.8);
    --glass-border: rgba(255, 255, 255, 0.1);
    
    /* 그림자 다크 모드 버전 */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.3), 0 4px 6px -4px rgb(0 0 0 / 0.3);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.3), 0 8px 10px -6px rgb(0 0 0 / 0.3);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.5);
  }
  
  /* Body 다크 모드 스타일 */
  body {
    background-color: var(--color-background);
    color: var(--color-text-primary);
  }
  
  /* 글래스 효과 다크 모드 */
  .glass {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
  }
  
  /* 버튼 다크 모드 */
  .btn {
    color: var(--color-text-primary);
  }
  
  .btn-secondary {
    background: rgba(71, 85, 105, 0.8);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
  }
  
  .btn-secondary:hover {
    background: rgba(71, 85, 105, 1);
  }
  
  /* 카드 다크 모드 */
  .card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
  }
  
  .card-modern {
    background: rgba(30, 41, 59, 0.8);
    border: 1px solid var(--color-border);
  }
}

/* Light Mode Variables (Default) */
:root {
  --color-background: #ffffff;
  --color-surface: var(--color-gray-50);
  --color-text-primary: var(--color-gray-900);
  --color-text-secondary: var(--color-gray-600);
  --color-text-muted: var(--color-gray-400);
  --color-border: var(--color-gray-200);
}

/* ==================== BASE STYLES ==================== */
html {
  font-size: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  font-family: var(--font-family-sans);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* ==================== TYPOGRAPHY ==================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-display);
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
  margin-bottom: var(--space-4);
  color: var(--color-text-secondary);
}

a {
  color: var(--color-primary-600);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-700);
}

a:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ==================== GLASSMORPHISM COMPONENTS ==================== */
.glass {
  background: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: var(--shadow-lg);
}

.glass-dark {
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: var(--shadow-2xl);
}

.glass:hover {
  background: rgba(255, 255, 255, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

/* ==================== MODERN 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-family-sans);
  font-weight: var(--font-weight-semibold);
  font-size: var(--text-base);
  line-height: 1;
  border: none;
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: all var(--transition-normal);
  user-select: none;
  white-space: nowrap;
  outline: none;
  position: relative;
  overflow: hidden;
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

.btn:active {
  transform: scale(0.98);
}

/* Primary Button */
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary-500), var(--color-secondary-500));
  color: white;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
  transform: translateY(-2px);
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.btn-primary:hover::before {
  left: 100%;
}

/* Secondary Button */
.btn-secondary {
  background: var(--color-background);
  color: var(--color-primary-600);
  border: 2px solid var(--color-primary-500);
  box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
  background: var(--color-primary-50);
    transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Ghost Button */
.btn-ghost {
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn-ghost:hover {
  background: var(--color-surface);
  transform: translateY(-1px);
}

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

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

/* ==================== CARD COMPONENTS ==================== */
.card {
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  position: relative;
    overflow: hidden;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary-200);
}

.card-modern {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-3xl);
  box-shadow: 
    0 8px 32px rgba(0, 0, 0, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.card-modern:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 
    0 20px 40px rgba(0, 0, 0, 0.15),
    inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

/* ==================== GRID SYSTEMS ==================== */
.grid-auto-fit {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-8);
}

.grid-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

/* ==================== CONTAINER QUERIES ==================== */
@container (max-width: 768px) {
  .grid-hero {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

/* ==================== ANIMATIONS ==================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(2rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInFromLeft {
  from {
    opacity: 0;
    transform: translateX(-2rem);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes pulseGlow {
  0% {
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
  }
  100% {
    box-shadow: 0 0 40px rgba(59, 130, 246, 0.6);
  }
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* Animation Classes */
.animate-fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

.animate-float {
  animation: float 6s ease-in-out infinite;
}

.animate-pulse-glow {
  animation: pulseGlow 2s ease-in-out infinite alternate;
}

.animate-spin {
  animation: spin 1s linear infinite;
}

/* ==================== 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;
}

.focus\:not-sr-only:focus {
  position: static;
  width: auto;
  height: auto;
  padding: inherit;
  margin: inherit;
  overflow: visible;
  clip: auto;
  white-space: normal;
}

/* ==================== INTERACTIVE ELEMENTS ==================== */
.interactive {
  transition: all var(--transition-fast);
  cursor: pointer;
}

.interactive:hover {
  transform: scale(1.05);
}

.interactive:active {
  transform: scale(0.95);
}

/* ==================== RESPONSIVE UTILITIES ==================== */
.container {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding-left: clamp(1rem, 4vw, 2rem);
  padding-right: clamp(1rem, 4vw, 2rem);
}

.content-width {
  max-width: 65ch;
  margin: 0 auto;
}

/* ==================== CUSTOM SCROLLBAR ==================== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-gray-100);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb {
  background: var(--color-primary-500);
  border-radius: var(--radius-full);
  transition: background var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary-600);
}

/* Firefox */
html {
  scrollbar-width: thin;
  scrollbar-color: var(--color-primary-500) var(--color-gray-100);
}

/* ==================== LOADING STATES ==================== */
.loading {
  position: relative;
  pointer-events: none;
  opacity: 0.6;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid var(--color-primary-500);
  border-radius: 50%;
  border-top-color: transparent;
  animation: spin 1s linear infinite;
}

/* ==================== NOTIFICATION STYLES ==================== */
.notification {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  background: linear-gradient(135deg, var(--color-success), #059669);
  color: white;
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  z-index: var(--z-toast);
  font-weight: var(--font-weight-medium);
  transform: translateX(100%);
  transition: transform var(--transition-normal);
}

.notification.show {
  transform: translateX(0);
}

/* ==================== RESPONSIVE BREAKPOINTS ==================== */
/* Mobile First Approach */
@media (max-width: 640px) {
  :root {
    --text-5xl: 2.2rem;
    --text-4xl: 1.8rem;
    --text-3xl: 1.5rem;
    --text-2xl: 1.3rem;
    --text-xl: 1.15rem;
    --text-lg: 1rem;
    --text-base: 0.9rem;
    --text-sm: 0.8rem;
  }
  
  .container {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }
  
  .btn-lg {
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-base);
  }
  
  /* 모바일에서 입력 필드 폰트 크기 최적화 */
  input[type="text"],
  input[type="email"],
  input[type="tel"],
  input[type="password"],
  textarea,
  select {
    font-size: 14px !important;
  }
  
  /* 모바일에서 placeholder 텍스트 크기 최적화 */
  input::placeholder,
  textarea::placeholder {
    font-size: 13px !important;
  }
  
  /* 모바일에서 라벨과 설명 텍스트 최적화 */
  label {
    font-size: 0.9rem !important;
  }
  
  /* 모바일에서 버튼 텍스트 최적화 */
  .btn {
    font-size: 0.9rem !important;
  }
}

@media (max-width: 768px) {
  .grid-hero {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  
  .card {
    padding: var(--space-4);
  }
  
  /* 메인 컨테이너 상단 패딩 최적화 */
  main {
    padding-top: 40px !important; /* pt-16 (64px) → 40px */
  }
  
  /* 추가 모바일 텍스트 최적화 */
  h1 { font-size: 2rem !important; }
  h2 { font-size: 1.75rem !important; }
  h3 { font-size: 1.5rem !important; }
  h4 { font-size: 1.25rem !important; }
  h5 { font-size: 1.1rem !important; }
  h6 { font-size: 1rem !important; }
  
  p {
    font-size: 0.9rem !important;
    line-height: 1.5 !important;
  }
  
  /* 카드 내부 텍스트 최적화 */
  .card h3,
  .card-modern h3 {
    font-size: 1.2rem !important;
  }
  
  .card p,
  .card-modern p {
    font-size: 0.85rem !important;
  }
}

@media (max-width: 1024px) {
  :root {
    --space-16: 3rem;
    --space-20: 4rem;
    --space-24: 5rem;
  }
}

/* ==================== PRINT STYLES ==================== */
@media print {
  *,
  *::before,
  *::after {
    background: transparent !important;
    color: black !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }
  
  a,
  a:visited {
    text-decoration: underline;
  }
  
  .glass,
  .glass-dark {
    background: white !important;
    border: 1px solid black !important;
  }
}

/* ==================== ACCESSIBILITY IMPROVEMENTS ==================== */
@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;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --color-border: #000000;
    --color-text-secondary: #000000;
  }
  
  .glass,
  .glass-dark {
    border: 2px solid currentColor;
  }
}

/* Focus management for keyboard users */
.js-focus-visible :focus:not(.focus-visible) {
    outline: none;
}

/* ==================== MODERN CSS FEATURES ==================== */
/* Container Queries Support */
@supports (container-type: inline-size) {
  .container-query {
    container-type: inline-size;
  }
}

/* Subgrid Support */
@supports (grid-template-rows: subgrid) {
  .subgrid {
    grid-template-rows: subgrid;
  }
}

/* CSS Nesting (Future-proof) */
@supports (selector(&)) {
  .nested-support {
    & .child {
      color: var(--color-primary-500);
    }
  }
}