/**
 * BluStreet Checkout - Responsive Styles
 * Luxury responsive design — sharp edges, generous spacing
 * Breakpoints: 320px (mobile), 768px (tablet), 1024px (desktop), 1280px (wide)
 */

/* ==========================================================================
   TABLET & BELOW (< 1024px)
   ========================================================================== */

@media (max-width: 1024px) {
    #checkout-container {
        padding: 0 var(--space-2);
        margin: var(--space-3) auto;
    }

    /* Stack layout */
    .checkout-content {
        grid-template-columns: 1fr;
        gap: var(--space-3);
    }

    .sidebar-column {
        position: static;
        order: -1; /* Price summary first on mobile */
    }

    /* Progress bar - Reduce spacing */
    .checkout-progress {
        padding: var(--space-3) var(--space-2);
    }

    .progress-line {
        width: 60px;
        margin: 0 var(--space-1);
    }

    .step-label {
        font-size: var(--text-xs);
    }

    .step-number {
        width: 40px;
        height: 40px;
        font-size: var(--text-sm);
    }

    /* Cards */
    .checkout-card {
        padding: var(--space-3);
    }

    .checkout-card h3 {
        font-size: var(--text-lg);
    }

    /* Vehicle summary */
    .vehicle-summary {
        flex-direction: column;
    }

    .vehicle-summary img {
        width: 100%;
        max-width: 400px;
        height: auto;
        aspect-ratio: 16 / 9;
    }

    /* Info grids */
    .info-grid {
        grid-template-columns: 1fr;
        gap: var(--space-2);
    }

    /* Form grids */
    .form-grid {
        grid-template-columns: 1fr;
    }

    .form-field.full-width {
        grid-column: span 1;
    }

    /* Saved cards grid */
    .saved-cards-grid {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   MOBILE (< 768px)
   ========================================================================== */

@media (max-width: 768px) {
    :root {
        /* Adjust spacing for mobile — still generous */
        --space-4: 1.75rem;
        --space-5: 2.25rem;
        --space-6: 2.75rem;
    }

    #checkout-container {
        margin: var(--space-2) auto;
    }

    /* Progress bar */
    .checkout-progress {
        flex-direction: row;
        justify-content: space-between;
        padding: var(--space-2);
        margin-bottom: var(--space-3);
    }

    .progress-step {
        flex: 1;
        gap: var(--space-1);
    }

    .step-number {
        width: 36px;
        height: 36px;
        font-size: var(--text-xs);
    }

    .step-label {
        font-size: 10px;
        text-align: center;
        max-width: 80px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .progress-line {
        width: 100%;
        max-width: 40px;
        margin: 0 4px;
    }

    /* Typography */
    .main-column > h2 {
        font-size: var(--text-2xl);
    }

    .notice-card h2 {
        font-size: var(--text-2xl);
    }

    .vehicle-details h4 {
        font-size: var(--text-xl);
    }

    /* Rental dates - Stack */
    .rental-dates {
        flex-direction: column;
        gap: var(--space-2);
    }

    .date-item {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }

    /* Buttons - Full width, larger tap targets */
    #checkout-container .btn-primary,
    #checkout-container .btn-secondary {
        padding: var(--space-3) var(--space-3);
        font-size: var(--text-lg);
        min-height: 48px; /* Better tap target */
    }

    /* Terms scroll - Smaller on mobile */
    .terms-scroll {
        height: 180px;
        font-size: var(--text-xs);
    }

    .checkbox-label {
        font-size: var(--text-sm);
        padding: var(--space-2);
    }

    .checkbox-label input[type="checkbox"] {
        width: 18px;
        height: 18px;
        flex-shrink: 0;
    }

    /* Signature pad */
    .signature-pad-canvas,
    #signature-pad {
        min-height: 150px;
    }

    /* Price summary */
    .price-summary-card {
        padding: var(--space-2);
    }

    .price-row {
        font-size: var(--text-sm);
    }

    .price-row.total {
        font-size: var(--text-lg);
    }

    /* Notice cards */
    .notice-card {
        padding: var(--space-4);
    }

    .requirements-list {
        font-size: var(--text-xs);
    }
}

/* ==========================================================================
   SMALL MOBILE (< 480px)
   ========================================================================== */

@media (max-width: 480px) {
    .checkout-progress {
        padding: var(--space-1);
    }

    .step-number {
        width: 32px;
        height: 32px;
    }

    .step-label {
        font-size: 9px;
        max-width: 60px;
    }

    .progress-line {
        max-width: 20px;
        margin: 0 2px;
    }

    .checkout-card {
        padding: var(--space-2);
    }

    .vehicle-summary img {
        height: auto;
    }

    /* Saved cards - Full width */
    .saved-cards-grid {
        gap: var(--space-1);
    }

    .card-option {
        padding: var(--space-1);
    }

    .form-field input,
    .form-field select {
        font-size: 16px; /* Prevent zoom on iOS */
    }
}

/* ==========================================================================
   LARGE DESKTOP (> 1280px)
   ========================================================================== */

@media (min-width: 1280px) {
    #checkout-container {
        max-width: 1100px;
    }

    .checkout-content {
        grid-template-columns: 1fr 440px;
        gap: var(--space-6);
    }

    .checkout-card {
        padding: var(--space-5);
    }

    .progress-line {
        width: 160px;
    }
}

/* ==========================================================================
   TOUCH DEVICE IMPROVEMENTS
   ========================================================================== */

@media (hover: none) and (pointer: coarse) {
    /* Larger tap targets */
    .card-option,
    #checkout-container .btn-primary,
    #checkout-container .btn-secondary,
    #checkout-container .link-button,
    #checkout-container .checkbox-label {
        min-height: 44px; /* Apple recommended tap target */
    }

    /* Remove hover states on touch */
    .checkout-card:hover {
        box-shadow: var(--shadow-sm);
    }

    .card-option:hover {
        transform: none;
    }

    /* Signature pad optimized for touch */
    .signature-pad-canvas,
    #signature-pad {
        border-width: 2px;
        border-style: solid;
        border-color: var(--brand-primary);
        cursor: default;
    }
}

/* ==========================================================================
   LANDSCAPE ORIENTATION
   ========================================================================== */

@media (max-width: 768px) and (orientation: landscape) {
    .terms-scroll {
        height: 140px;
    }

    .signature-pad-canvas,
    #signature-pad {
        min-height: 120px;
    }

    .notice-card {
        max-width: 600px;
    }
}

/* ==========================================================================
   DARK MODE SUPPORT — [data-theme="dark"] overrides
   Uses site-wide CSS variables from critical.css
   ========================================================================== */

[data-theme="dark"] {
    /* Gray scale — inverted for dark backgrounds */
    --gray-50: var(--bg-tertiary, #1a1a1a);
    --gray-100: #222;
    --gray-200: var(--border-color, #2a2a2a);
    --gray-300: var(--border-input, #333);
    --gray-400: #555;
    --gray-500: #777;
    --gray-600: #999;
    --gray-700: #bbb;
    --gray-800: #ddd;
    --gray-900: #f3f4f6;
    --brand-primary-lighter: rgba(0, 79, 162, 0.15);

    --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.4);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.4);
    --shadow-xl: 0 20px 25px rgba(0,0,0,0.4);
}

[data-theme="dark"] .checkout-card,
[data-theme="dark"] .notice-card,
[data-theme="dark"] .price-summary-card {
    background: var(--bg-card, #141414);
    border-color: var(--border-color, #2a2a2a);
}

[data-theme="dark"] .checkout-progress {
    background: var(--bg-card, #141414);
    border-color: var(--border-color, #2a2a2a);
}

[data-theme="dark"] #checkout-container .btn-primary {
    box-shadow: 0 1px 3px rgba(0,0,0,0.4);
}

[data-theme="dark"] #checkout-container .btn-primary:hover:not(:disabled) {
    box-shadow: 0 4px 6px rgba(0,0,0,0.5);
}

[data-theme="dark"] .link-button { color: #60a5fa; }
[data-theme="dark"] .link-button:hover { color: #93c5fd; }

/* ==========================================================================
   REDUCED MOTION
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .checkout-step,
    .notice-card,
    #new-card-form {
        animation: none;
    }
}

/* ==========================================================================
   HIGH CONTRAST MODE
   ========================================================================== */

@media (prefers-contrast: high) {
    .checkout-card,
    .notice-card,
    .price-summary-card {
        border-width: 2px;
    }

    #checkout-container .btn-primary {
        border: 2px solid currentColor;
    }

    .form-field input:focus,
    .form-field select:focus {
        outline: 2px solid var(--brand-primary);
        outline-offset: 2px;
    }
}