/*
     * REDESIGN + ANIMATION STYLES
     */
    body {
      font-family: 'Inter', sans-serif;
      background-color: #f8fafc; /* Lighter background */
      color: #1e293b; /* Darker text for better contrast */
    }

    .fade-in { animation: fadeIn 0.25s ease-in-out; }
    @keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

    /* General Card Style: Smoother shadows, rounded edges */
    .dashboard-card {
      background-color: white;
      border-radius: 1rem; /* More rounded */
      box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05); /* Subtle shadow */
      border: 1px solid #e2e8f0; /* Light border */
      padding: 1.5rem;
      transition: box-shadow 0.2s; /* Added transition */
    }

    /* Primary CTA Buttons */
    .cta-btn-primary {
      background-color: #1e40af; /* Deeper blue for better visibility */
      color: white;
      font-weight: 600;
      border-radius: 0.75rem;
      transition: background-color 0.2s, transform 0.1s, box-shadow 0.2s; /* Added transform for press animation */
    }
    .cta-btn-primary:hover { background-color: #1e3a8a; }
    .cta-btn-primary:active {
        transform: scale(0.98);
        box-shadow: 0 0 0 0.2rem rgba(30, 64, 175, 0.3); /* Soft ripple effect */
    }

    /* Secondary Navigation/List styles */
    .nav-item {
      width: 36px; height: 36px; display: flex; align-items: center; justify-content: center;
      border-radius: 50%; font-size: 0.85rem; font-weight: 600; cursor: pointer;
      transition: all 0.2s;
      border: 2px solid #e2e8f0; background-color: white; color: #64748b; position: relative;
    }
    .nav-item:hover { border-color: #94a3b8; }
    .nav-item.active { border-color: #3b82f6; color: #3b82f6; }
    .nav-item.answered { background-color: #eff6ff; color: #1e40af; border-color: #eff6ff; }
    .nav-item.nav-correct { background-color: #10b981; border-color: #10b981; color: white; }
    .nav-item.nav-wrong { background-color: #ef4444; border-color: #ef4444; color: white; }

    .flag-indicator {
      position: absolute; top: -2px; right: -2px; width: 10px; height: 10px;
      background-color: #f97316; border-radius: 999px; border: 1px solid white;
    }

    /* To-do List */
    .todo-item {
      transition: all 0.2s;
    }
    .todo-item.completed {
      background-color: #f1f5f9; /* Lighter completion background */
    }
    .todo-item.completed .task-text {
      text-decoration: line-through;
      color: #94a3b8; /* Faded color for completed tasks */
    }
    .todo-item-check:active {
        transform: scale(0.9);
    }

    /* Timer Animation */
    .timer-active {
      animation: pulse-green 2s infinite;
      color: #16a34a; /* More vibrant green */
      font-weight: 700;
    }
    @keyframes pulse-green { 0% { opacity: 1; } 50% { opacity: 0.7; } 100% { opacity: 1; } }

    /* Chart Tabs */
    .chart-btn {
      padding: 0.5rem 0.75rem;
      border-radius: 9999px;
      font-weight: 500;
      color: #475569;
      transition: all 0.15s, transform 0.1s;
    }
    .chart-btn:hover:not(.active) {
      background-color: #e2e8f0;
    }
    .chart-btn.active {
      background-color: #3b82f6; /* Use primary blue */
      color: white;
      box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    }
    .chart-btn:active {
      transform: scale(0.95);
    }

    /* Topic Tracker */
    .case-tab {
      transition: all 0.2s;
      border-left: 4px solid transparent;
    }
    .case-tab.active {
      background-color: #eef2ff; /* Very light indigo background */
      border-left-color: #4f46e5; /* Deeper indigo accent */
      color: #3730a3;
      font-weight: 600;
    }
    .topic-complete {
      background-color: #ecfdf5 !important; /* Very light green */
      border-color: #34d399 !important;
    }

    /* --- NEW EXPIRATION STYLE --- */
    .topic-expired {
        background-color: #fef2f2 !important; /* Very light red/pink */
        border-color: #fca5a5 !important; /* Light red border */
        box-shadow: 0 1px 3px 0 rgba(239, 68, 68, 0.1);
    }
    /* ---------------------------- */

    .tracker-row:nth-child(even) { background-color: white; }
    .tracker-row:nth-child(odd) { background-color: #f8fafc; }

    /* Review Due Indicator */
    .review-due {
        color: #ef4444; /* Red text for due items */
        font-weight: 600;
    }

    /* Login Screen */
    #login-screen {
      background: linear-gradient(135deg, #eff6ff 0%, #ffffff 100%);
    }

    /* ADHD Tracker */
    .adhd-timer-box {
      background-color: #e0f2fe;
      border-color: #bae6fd;
    }
    .active-dose-card {
        padding: 1rem;
        border-radius: 0.75rem;
        background-color: #f0f9ff;
        border: 1px solid #e0f2fe;
        margin-bottom: 1rem;
    }
    .active-dose-card:last-child {
        margin-bottom: 0;
    }

    #adhd-tab-timer.active {
      border-color: #3b82f6;
      color: #1e40af;
      font-weight: 700;
    }
    #adhd-tab-stock.active {
      border-color: #3b82f6;
      color: #1e40af;
      font-weight: 700;
    }

    /* OSCE Skill Status */
    .skill-level-btn {
        transition: all 0.15s;
        border: 2px solid #e2e8f0;
    }
    .skill-level-btn.Observed { background-color: #fef9e7; border-color: #fbbf24; }
    .skill-level-btn.Assisted { background-color: #eef2ff; border-color: #6366f1; }
    .skill-level-btn.Performed { background-color: #dcfce7; border-color: #10b981; }