/* ===== RESPONSIVE STYLES ===== */

/* Large Desktop */
@media (max-width: 1280px) {
  .dashboard-grid {
    grid-template-columns: 300px 1fr;
  }

  .chart-card {
    grid-column: 1 / -1;
  }

  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

/* Tablet */
@media (max-width: 1024px) {
  .sidebar {
    width: 200px;
  }

  .dashboard-grid {
    grid-template-columns: 1fr;
  }

  .timer-card, .todo-widget, .chart-card {
    grid-column: auto;
  }

  .stats-ribbon {
    display: none;
  }

  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .analytics-grid { grid-template-columns: 1fr; }
}

/* Mobile */
@media (max-width: 768px) {
  .app-container {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    height: auto;
    position: relative;
    padding: var(--spacing-sm) var(--spacing-md);
    flex-direction: row;
    align-items: center;
    overflow-x: auto;
  }

  .sidebar .logo {
    padding: 0;
    font-size: 1.2rem;
    margin-right: var(--spacing-md);
    flex-shrink: 0;
  }

  .sidebar .logo span { display: none; }

  .nav-menu {
    flex-direction: row;
    gap: 4px;
    padding: 0;
    overflow-x: auto;
    flex: 1;
  }

  .nav-item {
    white-space: nowrap;
    padding: 6px 12px;
    font-size: 12px;
  }

  .nav-item .nav-icon { display: none; }

  .sidebar-footer { display: none; }

  .main-content {
    min-height: calc(100vh - 60px);
  }

  .header {
    padding: var(--spacing-md);
  }

  .dashboard-body {
    padding: var(--spacing-md);
  }

  .page-content {
    padding: var(--spacing-md);
  }

  .page-header {
    flex-direction: column;
    align-items: flex-start;
  }

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

  .modal-content {
    padding: var(--spacing-lg);
    max-width: 95%;
  }

  .user-grid {
    gap: var(--spacing-lg);
  }

  .user-circle {
    width: 80px;
    height: 80px;
    font-size: 32px;
  }

  .timer-circle {
    width: 200px;
    height: 200px;
  }

  .timer-display {
    font-size: 36px;
  }

  .noise-fab {
    bottom: var(--spacing-md);
    right: var(--spacing-md);
  }

  .studying-banner {
    flex-direction: column;
    align-items: flex-start;
  }

  .stats-ribbon { display: none; }

  .form-row { grid-template-columns: 1fr; }

  .table-container { font-size: 12px; }
  th, td { padding: 8px 10px; }

  .analytics-filter-bar {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* Small Mobile */
@media (max-width: 480px) {
  .login-title {
    font-size: var(--font-size-2xl);
  }

  .user-circle {
    width: 70px;
    height: 70px;
    font-size: 28px;
  }

  .user-grid {
    gap: var(--spacing-md);
  }

  .header-greeting {
    font-size: var(--font-size-lg);
  }

  .timer-display {
    font-size: 30px;
  }

  .grid-4 { grid-template-columns: 1fr; }

  .modal-actions {
    flex-direction: column-reverse;
  }

  .modal-actions .btn {
    width: 100%;
  }

  .intro-title { font-size: 52px; }
  .intro-subtitle { font-size: 14px; }
}

/* Print */
@media print {
  .sidebar, .noise-fab, .btn, .fab-btn { display: none; }
  .main-content { width: 100%; }
  .card { box-shadow: none; border: 1px solid #ccc; }
}