:root {
  --primary-color: #4f46e5;
  /* Indigo 600 */
  --primary-hover: #4338ca;
  /* Indigo 700 */
  --secondary-color: #db2777;
  /* Pink 600 */
  --background-dark: #f3f4f6;
  /* Gray 100 */
  --surface-dark: #ffffff;
  /* White */
  --text-primary: #111827;
  /* Gray 900 */
  --text-secondary: #4b5563;
  /* Gray 600 */
  --border-color: #e5e7eb;
  /* Gray 200 */
  --success: #059669;
  --error: #dc2626;
  --radius: 0.75rem;
  --shadow:
    0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family:
    "Inter",
    system-ui,
    -apple-system,
    sans-serif;
}

body {
  background-color: var(--background-dark);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Utilities */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
  font-size: 0.95rem;
}

.btn-primary {
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  color: white;
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  background-color: rgba(255, 255, 255, 0.05);
  /* Glassy input */
  color: var(--text-primary);
  transition: border-color 0.2s;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  background-color: rgba(255, 255, 255, 0.08);
  /* Slightly lighter on focus */
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

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

.sidebar {
  width: 260px;
  background-color: var(--surface-dark);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  overflow-y: auto;
  max-height: 100vh;
}

.brand {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.brand span {
  background: linear-gradient(to right, #818cf8, #e879f9);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-link {
  display: block;
  padding: 0.75rem 1rem;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius);
  margin-bottom: 0.25rem;
  transition: all 0.2s;
  font-weight: 500;
}

.nav-link:hover,
.nav-link.active {
  background-color: rgba(99, 102, 241, 0.1);
  color: var(--primary-color);
}

.sidebar-header {
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding-left: 1rem;
  opacity: 0.7;
}

.main-content {
  flex: 1;
  padding: 2rem;
  background-color: var(--background-dark);
}

/* Data Table Standard */
.table-container {
  overflow-x: auto;
  background-color: var(--surface-dark);
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  white-space: nowrap;
}

.data-table th,
.data-table td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.data-table th {
  font-weight: 600;
  color: var(--text-secondary);
  background-color: rgba(0, 0, 0, 0.02);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tr:hover td {
  background-color: rgba(255, 255, 255, 0.02);
}

/* Sidebar Toggle for Mobile */
.sidebar-toggle {
  display: none;
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 1001;
  background: var(--surface-dark);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 0.5rem;
  border-radius: var(--radius);
  cursor: pointer;
}

/* Responsive Styles */
@media (max-width: 768px) {
  .layout {
    flex-direction: column;
  }

  .sidebar {
    position: fixed;
    left: -260px;
    top: 0;
    bottom: 0;
    z-index: 1000;
    transition: left 0.3s ease-in-out;
    box-shadow: var(--shadow);
  }

  .sidebar.active {
    left: 0;
  }

  .sidebar-toggle {
    display: block;
  }

  /* Overlay when sidebar is open */
  .sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
  }

  .sidebar-overlay.active {
    display: block;
  }

  .main-content {
    padding: 1rem;
    padding-top: 4rem;
    /* Space for toggle button */
  }

  .header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .header > div:last-child {
    width: 100%;
  }

  .btn {
    width: 100%;
    text-align: center;
  }

  /* Table Responsiveness */
  .table-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}