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

:root {
  --background: #f8fafc;
  --foreground: #0f172a;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --accent: #d4af37;       /* Elegant Gold */
  --accent-hover: #b5952f;
  --surface: #ffffff;
  --surface-alt: #f1f5f9;
  --border: #e2e8f0;
  --ring: rgba(59, 130, 246, 0.5);
  --error: #ef4444;
  --success: #10b981;
  --font-sans: 'Inter', sans-serif;
  --font-heading: 'Poppins', sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #09090b; /* Deep Dark */
    --foreground: #fafafa;
    --primary: #3b82f6;
    --primary-hover: #60a5fa;
    --accent: #d4af37;       /* Elegant Gold */
    --accent-hover: #fcd34d;
    --surface: #121214;
    --surface-alt: #18181b;
    --border: #27272a;
    --ring: rgba(212, 175, 55, 0.4); /* Gold ring */
  }
}

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

body {
  background: var(--background);
  color: var(--foreground);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  letter-spacing: -0.02em;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Common UI Components */
.btn-primary {
  background: var(--accent);
  color: #000;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  box-shadow: 0 4px 14px 0 rgba(212, 175, 55, 0.2);
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(212, 175, 55, 0.4);
}

.btn-danger {
  background: transparent;
  color: var(--error);
  border: 1px solid var(--error);
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-danger:hover {
  background: var(--error);
  color: #fff;
}

.input-field {
  width: 100%;
  padding: 0.875rem 1.25rem;
  font-size: 1rem;
  font-family: var(--font-sans);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  background: var(--surface-alt);
  color: var(--foreground);
  transition: all 0.3s ease;
  outline: none;
}

.input-field:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--ring);
  background: var(--surface);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 2.5rem;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.2), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px -5px rgba(212, 175, 55, 0.15);
}

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

.sidebar {
  width: 280px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
}

.sidebar-nav {
  margin-top: 3rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex-grow: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-radius: 0.75rem;
  color: var(--foreground);
  font-weight: 500;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.03);
  transform: translateX(4px);
  color: var(--accent);
}

.nav-item.active {
  background: var(--surface-alt);
  color: var(--accent);
  border-left: 3px solid var(--accent);
  font-weight: 600;
}

.main-content {
  flex: 1;
  padding: 2.5rem 3rem;
  background: var(--background);
  overflow-y: auto;
}

/* Tables */
.interactive-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  text-align: left;
}

.interactive-table th {
  padding: 1.25rem 1rem;
  color: var(--border);
  font-weight: 500;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
}

.interactive-table td {
  padding: 1.25rem 1rem;
  color: var(--foreground);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.interactive-table tr {
  transition: background-color 0.2s ease;
}

.interactive-table tbody tr:hover {
  background: var(--surface-alt);
}

.badge {
  background: var(--ring);
  color: var(--accent);
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.875rem;
  font-weight: 600;
}

/* Utilities */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

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

.glass {
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

@media (prefers-color-scheme: dark) {
  .glass {
    background: rgba(18, 18, 20, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.08);
  }
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
  .dashboard-layout {
    flex-direction: column;
  }
  
  .sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 1.5rem;
  }

  .sidebar-nav {
    margin-top: 1.5rem;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .main-content {
    padding: 1.5rem;
  }

  .interactive-table {
    font-size: 0.875rem;
  }
  
  .interactive-table th, .interactive-table td {
    padding: 1rem 0.5rem;
  }

  .card {
    padding: 1.5rem;
  }
  
  form[action="dashboard.php"] > div[style*="grid"] {
    grid-template-columns: 1fr !important;
  }
}