/* ===========================
   Responsive Design - Mobile First Approach
   =========================== */

/* ===========================
   Small Devices (phones, 360px and up)
   This is the base, mobile-first design
   =========================== */
@media (max-width: 360px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    header h1 {
        font-size: 1.25rem;
    }
    
    .nav-list {
        flex-direction: column;
    }
    
    .nav-link {
        width: 100%;
        text-align: center;
    }
}

/* ===========================
   Medium Devices (tablets, 768px and up)
   =========================== */
@media (min-width: 768px) {
    /* Navigation */
    .nav-list {
        justify-content: center;
    }
    
    /* Stats Grid */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* Controls Panel */
    .controls-panel {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
    
    .search-box {
        flex: 1;
    }
    
    /* Table visible, cards hidden */
    .table-responsive {
        display: block;
    }
    
    .books-cards {
        display: none;
    }
    
    /* Form */
    #book-form {
        padding: var(--spacing-2xl);
    }
}

/* ===========================
   Large Devices (desktops, 1024px and up)
   =========================== */
@media (min-width: 1024px) {
    /* Container */
    .container {
        padding: 0 var(--spacing-xl);
    }
    
    /* Stats Grid */
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    /* Navigation */
    .nav-list {
        justify-content: flex-start;
    }
    
    /* Main content wider spacing */
    main {
        padding: var(--spacing-2xl) 0;
    }
    
    section h2 {
        font-size: 2rem;
    }
}

/* ===========================
   Small Devices - Mobile Cards View
   =========================== */
@media (max-width: 767px) {
    /* Hide table, show cards */
    .table-responsive {
        display: none;
    }
    
    .books-cards {
        display: block;
    }
    
    /* Stack form actions */
    .form-actions {
        flex-direction: column;
    }
    
    .form-actions .btn {
        width: 100%;
    }
    
    /* Stack settings items */
    .setting-item {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .setting-item label {
        min-width: auto;
    }
    
    /* Target display */
    .target-display {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .target-display input {
        width: 100%;
    }
}

/* ===========================
   Print Styles
   =========================== */
@media print {
    nav,
    footer,
    .controls-panel,
    .form-actions,
    .action-btn {
        display: none;
    }
    
    main {
        padding: 0;
    }
    
    .books-table {
        font-size: 0.85rem;
    }
}

/* ===========================
   Reduced Motion (Accessibility)
   =========================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ===========================
   Dark Mode Support (Optional - Stretch)
   =========================== */
@media (prefers-color-scheme: dark) {
    /* TODO: Add dark mode styles if implementing theme toggle */
}