/* main.css - 공통 스타일 */

/* ========== 폰트 임포트 ========== */
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard/dist/web/static/pretendard.css');

/* ========== CSS 변수 정의 ========== */
:root {
  /* Primary Colors */
  --deep-pulse: #240062;
  --violet-stream: #6556ff;
  --neon-pink: #ff006e;
  --electric-blue: #00d9ff;
  --mint-green: #00ff9d;
  --sunset-orange: #ff6b00;
  --cosmic-glow: #ffd93d;
  
  /* Grayscale */
  --white: #ffffff;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --black: #000000;
  
  /* Typography */
  --font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --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);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
  --shadow-glow: 0 0 20px rgba(101, 86, 255, 0.3);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
}

/* ========== Reset & Base ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--gray-800);
  background-color: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ========== Typography ========== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: 3rem;
}

h2 {
  font-size: 2.25rem;
}

h3 {
  font-size: 1.875rem;
}

h4 {
  font-size: 1.5rem;
}

h5 {
  font-size: 1.25rem;
}

h6 {
  font-size: 1.125rem;
}

p {
  margin-bottom: var(--spacing-sm);
}

a {
  color: var(--violet-stream);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--deep-pulse);
}

/* ========== Container ========== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-narrow {
  max-width: 800px;
}

.container-wide {
  max-width: 1400px;
}

/* ========== Buttons ========== */
.btn {
  display: inline-block;
  padding: 1rem 2rem;
  font-size: 1.125rem;
  font-weight: 600;
  text-align: center;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--violet-stream), var(--neon-pink));
  color: var(--white);
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(101, 86, 255, 0.5);
}

.btn-secondary {
  background: var(--gray-200);
  color: var(--gray-800);
}

.btn-secondary:hover {
  background: var(--gray-300);
}

.btn-large {
  padding: 1.25rem 3rem;
  font-size: 1.25rem;
}

.btn-small {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
  display: block;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ========== Cards ========== */
.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  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);
}

/* ========== Gradients ========== */
.gradient-bg {
  background: linear-gradient(135deg, var(--deep-pulse), var(--violet-stream));
  color: var(--white);
}

.gradient-text {
  background: linear-gradient(135deg, var(--violet-stream), var(--neon-pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ========== Badges ========== */
.badge {
  display: inline-block;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--gray-200);
  color: var(--gray-800);
}

.badge-primary {
  background: linear-gradient(135deg, var(--violet-stream), var(--neon-pink));
  color: var(--white);
}

.badge-success {
  background: var(--mint-green);
  color: var(--gray-900);
}

.badge-warning {
  background: var(--sunset-orange);
  color: var(--white);
}

.badge-danger {
  background: var(--neon-pink);
  color: var(--white);
}

/* ========== Progress Bar ========== */
.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--violet-stream), var(--neon-pink));
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

/* ========== Forms ========== */
.form-field {
  margin-bottom: var(--spacing-md);
}

.form-field label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--gray-700);
}

.form-field input,
.form-field textarea,
.form-field select {
  width: 100%;
  padding: 0.875rem 1rem;
  font-size: 1rem;
  font-family: var(--font-family);
  border: 2px solid var(--gray-300);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast);
}

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  outline: none;
  border-color: var(--violet-stream);
}

.form-field .hint {
  display: block;
  font-size: 0.875rem;
  color: var(--gray-500);
  margin-top: var(--spacing-xs);
}

.checkbox-field {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.checkbox-field input[type="checkbox"] {
  width: 1.25rem;
  height: 1.25rem;
  cursor: pointer;
}

/* ========== Utilities ========== */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.hidden {
  display: none !important;
}

.flex {
  display: flex;
}

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

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.gap-1 { gap: var(--spacing-xs); }
.gap-2 { gap: var(--spacing-sm); }
.gap-3 { gap: var(--spacing-md); }

/* ========== Responsive ========== */
@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  h3 {
    font-size: 1.5rem;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .btn {
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
  }
}

/* ========== Animations ========== */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideInUp {
  from {
    transform: translateY(30px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.fade-in {
  animation: fadeIn 0.5s ease;
}

.slide-in-up {
  animation: slideInUp 0.5s ease;
}

/* ========== Loading ========== */
.loading {
  display: inline-block;
  width: 3rem;
  height: 3rem;
  border: 4px solid var(--gray-200);
  border-top-color: var(--violet-stream);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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