/* Pretendard 폰트 임포트 */
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.min.css');

/* CSS 변수 정의 */
:root {
  --font-size: 16px;
  /* Typography font sizes */
  --text-2xl: 30px;
  --text-xl: 24px;
  --text-lg: 20px;
  --text-md: 17px;
  --text-base: 14px;
  --text-sm: 12px;
  /* Font family */
  --font-family: 'Pretendard', sans-serif;
  /* Font weights */
  --font-weight-bold: 700;
  --font-weight-medium: 500;
  --font-weight-normal: 400;
  /* Colors */
  --background: rgba(255, 255, 255, 1.00);
  --foreground: rgba(26, 33, 40, 1.00);
  --card: rgba(255, 255, 255, 1.00);
  --card-foreground: rgba(26, 33, 40, 1.00);
  --popover: rgba(255, 255, 255, 1.00);
  --popover-foreground: rgba(26, 33, 40, 1.00);
  --primary: rgba(0, 175, 255, 1.00);
  --primary-foreground: rgba(255, 255, 255, 1.00);
  --secondary: rgba(80, 92, 102, 1.00);
  --secondary-foreground: rgba(255, 255, 255, 1.00);
  --muted: rgba(2, 32, 71, 0.05);
  --muted-foreground: rgba(80, 92, 102, 1.00);
  --accent: rgba(0, 175, 255, 1.00);
  --accent-foreground: rgba(255, 255, 255, 1.00);
  --destructive: rgba(248, 72, 72, 1.00);
  --destructive-foreground: rgba(255, 255, 255, 1.00);
  --border: rgba(2, 32, 71, 0.05);
  --input: rgba(255, 255, 255, 1.00);
  --input-background: rgba(255, 255, 255, 1.00);
  --ring: rgba(0, 175, 255, 1.00);
  --elevation-sm: 0px 2px 8px 0px rgba(0,0,0,0.08), 0px 2px 20px 0px rgba(0,0,0,0.12);
  --chart-1: rgba(0, 175, 255, 1.00);
  --chart-2: rgba(80, 92, 102, 1.00);
  --chart-3: rgba(43, 183, 116, 1.00);
  --chart-4: rgba(251, 170, 22, 1.00);
  --chart-5: rgba(248, 72, 72, 1.00);
  /* Border radius */
  --radius: 10px;
  --radius-button: 8px;
  --radius-card: 12px;
  /* Sidebar */
  --sidebar: rgba(255, 255, 255, 1.00);
  --sidebar-foreground: rgba(26, 33, 40, 1.00);
  --sidebar-primary: rgba(0, 175, 255, 1.00);
  --sidebar-primary-foreground: rgba(255, 255, 255, 1.00);
  --sidebar-accent: rgba(0, 175, 255, 1.00);
  --sidebar-accent-foreground: rgba(255, 255, 255, 1.00);
  --sidebar-border: rgba(2, 32, 71, 0.05);
  --sidebar-ring: rgba(0, 175, 255, 1.00);
}

/* Dark mode */
.dark {
  --background: rgba(26, 33, 40, 1.00);
  --foreground: rgba(255, 255, 255, 1.00);
  --card: rgba(40, 50, 60, 1.00);
  --card-foreground: rgba(255, 255, 255, 1.00);
  --popover: rgba(40, 50, 60, 1.00);
  --popover-foreground: rgba(255, 255, 255, 1.00);
  --primary: rgba(0, 175, 255, 1.00);
  --primary-foreground: rgba(255, 255, 255, 1.00);
  --secondary: rgba(60, 70, 80, 1.00);
  --secondary-foreground: rgba(255, 255, 255, 1.00);
  --muted: rgba(40, 50, 60, 1.00);
  --muted-foreground: rgba(160, 170, 180, 1.00);
  --accent: rgba(0, 175, 255, 1.00);
  --accent-foreground: rgba(255, 255, 255, 1.00);
  --destructive: rgba(248, 72, 72, 1.00);
  --destructive-foreground: rgba(255, 255, 255, 1.00);
  --border: rgba(60, 70, 80, 1.00);
  --input: rgba(40, 50, 60, 1.00);
  --ring: rgba(0, 175, 255, 1.00);
  --sidebar: rgba(30, 40, 50, 1.00);
  --sidebar-foreground: rgba(255, 255, 255, 1.00);
  --sidebar-primary: rgba(0, 175, 255, 1.00);
  --sidebar-primary-foreground: rgba(255, 255, 255, 1.00);
  --sidebar-accent: rgba(0, 175, 255, 1.00);
  --sidebar-accent-foreground: rgba(255, 255, 255, 1.00);
  --sidebar-border: rgba(60, 70, 80, 1.00);
  --sidebar-ring: rgba(0, 175, 255, 1.00);
}

/* Base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: var(--font-size);
}

body {
  background-color: var(--background);
  color: var(--foreground);
  font-family: var(--font-family);
  line-height: 1.5;
  min-height: 100vh;
}

/* Typography */
h1 {
  font-family: var(--font-family);
  font-size: var(--text-2xl);
  font-weight: var(--font-weight-bold);
  line-height: 1.5;
}

h2 {
  font-family: var(--font-family);
  font-size: var(--text-xl);
  font-weight: var(--font-weight-bold);
  line-height: 1.5;
}

h3 {
  font-family: var(--font-family);
  font-size: var(--text-lg);
  font-weight: var(--font-weight-bold);
  line-height: 1.5;
}

h4 {
  font-family: var(--font-family);
  font-size: var(--text-md);
  font-weight: var(--font-weight-bold);
  line-height: 1.5;
}

p {
  font-family: var(--font-family);
  font-size: var(--text-base);
  font-weight: var(--font-weight-medium);
  line-height: 1.5;
}

label {
  font-family: var(--font-family);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-normal);
  line-height: 1.5;
}

/* Utility classes */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  margin-bottom: 64px;
}

.section-title {
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}

.grid {
  display: grid;
  gap: 24px;
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }

.flex {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.space-y-4 > * + * { margin-top: 16px; }
.space-y-6 > * + * { margin-top: 24px; }

.text-muted {
  color: var(--muted-foreground);
}

/* Header */
.header {
  background-color: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
}

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

/* Buttons */
.btn {
  font-family: var(--font-family);
  font-size: var(--text-base);
  font-weight: var(--font-weight-medium);
  padding: 12px 24px;
  border: none;
  border-radius: var(--radius-button);
  cursor: pointer;
  transition: opacity 0.2s;
}

.btn:hover {
  opacity: 0.9;
}

.btn-primary {
  background-color: var(--primary);
  color: var(--primary-foreground);
}

.btn-secondary {
  background-color: var(--secondary);
  color: var(--secondary-foreground);
}

.btn-destructive {
  background-color: var(--destructive);
  color: var(--destructive-foreground);
}

.btn-muted {
  background-color: var(--muted);
  color: var(--muted-foreground);
}

.btn-outline {
  background-color: transparent;
  border: 2px solid var(--border);
  color: var(--foreground);
}

.btn-outline:hover {
  background-color: var(--muted);
  opacity: 1;
}

.btn-ghost {
  background-color: transparent;
  color: var(--foreground);
}

.btn-ghost:hover {
  background-color: var(--muted);
  opacity: 1;
}

.btn-sm {
  padding: 8px 16px;
  font-size: var(--text-sm);
}

.btn-lg {
  padding: 16px 32px;
  font-size: var(--text-lg);
}

/* Cards */
.card {
  background-color: var(--card);
  color: var(--card-foreground);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 24px;
}

.card-shadow {
  box-shadow: var(--elevation-sm);
}

.card-muted {
  background-color: var(--muted);
}

/* Color Swatch */
.color-swatch {
  border-radius: var(--radius-card);
  padding: 24px;
  min-height: 120px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.color-swatch-text {
  font-size: var(--text-lg);
  font-weight: var(--font-weight-bold);
  text-align: center;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.color-swatch-label {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
}

/* Form elements */
.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  margin-bottom: 8px;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 12px 16px;
  background-color: var(--input-background);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-family);
  font-size: var(--text-base);
  color: var(--foreground);
  outline: none;
  transition: all 0.2s;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--ring);
  box-shadow: 0 0 0 2px var(--ring);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

.form-checkbox,
.form-radio {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  cursor: pointer;
  accent-color: var(--primary);
}

.checkbox-group,
.radio-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.checkbox-group label,
.radio-group label {
  cursor: pointer;
}

/* Alerts */
.alert {
  border-radius: var(--radius-card);
  padding: 16px;
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.alert-icon {
  font-size: var(--text-lg);
  flex-shrink: 0;
}

.alert-title {
  font-weight: var(--font-weight-medium);
  margin-bottom: 4px;
}

.alert-description {
  font-size: var(--text-sm);
  color: var(--muted-foreground);
}

.alert-info {
  background-color: color-mix(in srgb, var(--primary) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--primary) 20%, transparent);
}

.alert-info .alert-icon {
  color: var(--primary);
}

.alert-success {
  background-color: color-mix(in srgb, var(--accent) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 20%, transparent);
}

.alert-success .alert-icon {
  color: var(--accent);
}

.alert-error {
  background-color: color-mix(in srgb, var(--destructive) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--destructive) 20%, transparent);
}

.alert-error .alert-icon {
  color: var(--destructive);
}

.alert-neutral {
  background-color: var(--muted);
  border: 1px solid var(--border);
}

.alert-neutral .alert-icon {
  color: var(--muted-foreground);
}

/* Spacing examples */
.spacing-box {
  background-color: var(--muted);
  border-radius: var(--radius);
  text-align: center;
}

.spacing-sm { padding: 8px; }
.spacing-md { padding: 16px; }
.spacing-lg { padding: 24px; }

/* Border radius examples */
.radius-example {
  background-color: var(--card);
  border: 1px solid var(--border);
  padding: 32px;
  text-align: center;
}

.radius-button-example { border-radius: var(--radius-button); }
.radius-default-example { border-radius: var(--radius); }
.radius-card-example { border-radius: var(--radius-card); }