:root {
  /* Colors from design system */
  --color-brand-primary: #4A3A2E;
  --color-brand-secondary: #D87D4A;
  --color-brand-accent: #E8A87C;
  --color-bg-primary: #FFFFFF;
  --color-bg-secondary: #F7F4F0;
  --color-bg-tertiary: #EFEAE4;
  --color-text-primary: #2A2420;
  --color-text-secondary: #6B6158;
  --color-text-muted: #9A9188;
  --color-success: #2E7D5B;
  --color-warning: #C8862E;
  --color-error: #B3402E;
  --color-border: #D9D3CC;
  --color-divider: #E9E4DD;
  --color-overlay: rgba(42, 36, 32, 0.6);
  
  /* Typography */
  --font-family-display: "Nanum Square Round", "Nanum Gothic", sans-serif;
  --font-family-body: "Nanum Gothic", "Inter", sans-serif;
  --font-family-mono: "JetBrains Mono", monospace;
  
  /* Type scale */
  --text-h1: clamp(1.75rem, 4vw, 2.5rem);
  --text-h2: clamp(1.5rem, 3.5vw, 2rem);
  --text-h3: clamp(1.25rem, 3vw, 1.5rem);
  --text-body: 1rem;
  --text-body-sm: 0.875rem;
  --text-caption: 0.75rem;
  --text-button: 0.9375rem;
  --text-mono: 0.875rem;
  
  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-8: 48px;
  
  /* Border radius */
  --radius-md: 8px;
  --radius-lg: 12px;
}

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

body {
  font-family: var(--font-family-body);
  font-size: var(--text-body);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Layout */
.admin-layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 260px;
  background-color: var(--color-brand-primary);
  color: #FFFFFF;
  flex-shrink: 0;
}

.sidebar__header {
  padding: var(--space-6) var(--space-4);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar__logo {
  font-family: var(--font-family-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: #FFFFFF;
  text-decoration: none;
}

.sidebar__nav {
  padding: var(--space-4) 0;
}

.sidebar__nav-item {
  display: block;
  padding: var(--space-3) var(--space-4);
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  font-size: var(--text-body-sm);
  transition: all 0.2s;
  border-left: 3px solid transparent;
}

.sidebar__nav-item:hover {
  background-color: rgba(255, 255, 255, 0.1);
  color: #FFFFFF;
}

.sidebar__nav-item.active {
  background-color: rgba(255, 255, 255, 0.15);
  color: #FFFFFF;
  border-left-color: var(--color-brand-accent);
  font-weight: 600;
}

/* Main content */
.main {
  flex: 1;
  background-color: var(--color-bg-secondary);
}

.header {
  background-color: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__title {
  font-family: var(--font-family-display);
  font-size: var(--text-h2);
  font-weight: 700;
}

.header__user {
  color: var(--color-text-secondary);
  font-size: var(--text-body-sm);
}

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

/* Card */
.card {
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-bottom: var(--space-5);
  box-shadow: 0 4px 12px rgba(42, 36, 32, 0.06);
}

.card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-divider);
}

.card__title {
  font-family: var(--font-family-display);
  font-size: var(--text-h3);
  font-weight: 600;
}

/* Button */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-family-body);
  font-size: var(--text-button);
  font-weight: 600;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s;
}

.btn--primary {
  background-color: var(--color-brand-primary);
  color: #FFFFFF;
}

.btn--primary:hover {
  background-color: var(--color-brand-secondary);
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-brand-primary);
  border: 1px solid var(--color-brand-primary);
}

.btn--secondary:hover {
  background-color: var(--color-bg-tertiary);
}

/* Table */
.table {
  width: 100%;
  border-collapse: collapse;
}

.table th {
  text-align: left;
  padding: var(--space-3) var(--space-2);
  background-color: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  font-size: var(--text-body-sm);
  font-weight: 600;
  border-bottom: 2px solid var(--color-border);
}

.table td {
  padding: var(--space-3) var(--space-2);
  border-bottom: 1px solid var(--color-divider);
  font-size: var(--text-body-sm);
}

.table tr:hover {
  background-color: var(--color-bg-secondary);
}

/* Stats grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.stat-card {
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: 0 4px 12px rgba(42, 36, 32, 0.06);
}

.stat-card__label {
  color: var(--color-text-secondary);
  font-size: var(--text-body-sm);
  margin-bottom: var(--space-2);
}

.stat-card__value {
  font-family: var(--font-family-display);
  font-size: var(--text-h2);
  font-weight: 700;
  color: var(--color-brand-primary);
}

/* Responsive */
@media (max-width: 768px) {
  .admin-layout {
    flex-direction: column;
  }
  
  .sidebar {
    width: 100%;
  }
  
  .sidebar__nav {
    display: flex;
    overflow-x: auto;
    padding: 0;
  }
  
  .sidebar__nav-item {
    white-space: nowrap;
    border-left: none;
    border-bottom: 3px solid transparent;
  }
  
  .sidebar__nav-item.active {
    border-left-color: transparent;
    border-bottom-color: var(--color-brand-accent);
  }
  
  .content {
    padding: var(--space-4);
  }
}