@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* Colors - Dark Mode Default */
  --bg-main: #0a0e27;
  --bg-card: rgba(15, 22, 41, 0.7);
  --bg-card-hover: rgba(26, 31, 58, 0.8);
  --bg-sidebar: #0f1629;
  --bg-topbar: rgba(10, 14, 39, 0.85);
  
  --text-primary: #ffffff;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent-blue: #4f8cff;
  --accent-blue-hover: #3b76e5;
  --accent-purple: #6c5ce7;
  --accent-purple-hover: #5848d5;
  
  --success: #00d68f;
  --warning: #ffaa00;
  --error: #ff4757;
  --info: #00b8d9;
  
  --border-color: rgba(255, 255, 255, 0.1);
  --border-light: rgba(255, 255, 255, 0.05);
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
  --shadow-glow: 0 0 15px rgba(79, 140, 255, 0.3);
  
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  
  --font-family: 'Inter', sans-serif;
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

[data-theme="light"] {
  --bg-main: #f8fafc;
  --bg-card: rgba(255, 255, 255, 0.9);
  --bg-card-hover: rgba(255, 255, 255, 1);
  --bg-sidebar: #ffffff;
  --bg-topbar: rgba(255, 255, 255, 0.95);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --border-color: rgba(0, 0, 0, 0.1);
  --border-light: rgba(0, 0, 0, 0.05);
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-glow: 0 0 15px rgba(79, 140, 255, 0.2);
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

a {
  color: var(--accent-blue);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-blue-hover);
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }

p {
  margin-bottom: 1rem;
}

/* Layout */
.app-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  grid-template-rows: 70px 1fr;
  min-height: 100vh;
}

.sidebar {
  grid-column: 1;
  grid-row: 1 / -1;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  z-index: 40;
  display: flex;
  flex-direction: column;
}

.top-bar {
  grid-column: 2;
  grid-row: 1;
  background-color: var(--bg-topbar);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  position: sticky;
  top: 0;
}

.main-content {
  grid-column: 2;
  grid-row: 2;
  padding: 2rem;
  overflow-y: auto;
  position: relative;
}

/* Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-5 { gap: 1.25rem; }

.grid { display: grid; }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mt-5 { margin-top: 1.5rem; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-5 { margin-bottom: 1.5rem; }

.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 0.75rem; }
.p-4 { padding: 1rem; }
.p-5 { padding: 1.5rem; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }

.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-success { color: var(--success); }
.text-error { color: var(--error); }
.text-warning { color: var(--warning); }
.text-info { color: var(--info); }

.relative { position: relative; }
.absolute { position: absolute; }
.hidden { display: none !important; }

/* Responsive */
@media (max-width: 1024px) {
  .app-layout {
    grid-template-columns: 80px 1fr;
  }
}

@media (max-width: 768px) {
  .app-layout {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: fixed;
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .top-bar {
    grid-column: 1;
  }
  .main-content {
    grid-column: 1;
  }
}