/**
 * ==============================================================================
 * SADRA VISUALS — ARTBOOK PHOTOGRAPHY GALLERY & STUDIO PORTFOLIO
 * LAYER 6.6: KEYBOARD NAVIGATION CONTROLLER & SHORTCUTS HUD STYLES
 * ==============================================================================
 *
 * Design System Implementation:
 * 1. Frosted glass dismissal backdrop with backdrop-filter blur
 * 2. Elegant keyboard shortcuts modal dialog with keycap visual badges
 * 3. Categorized shortcut columns (Navigation, Viewing, Actions, System)
 * 4. Responsive mobile bottom-sheet transform for small screens (< 768px)
 * 5. Minimum 44px touch targets on close controls
 * 6. Smooth keycap glowing interactions and micro-animations
 */

/* ------------------------------------------------------------------------------
 * 1. BACKDROP & MODAL MOUNT
 * ------------------------------------------------------------------------------ */

.keyboard-modal-backdrop {
    position: fixed;
    inset: 0;
    z-index: 10000;
    background-color: rgba(5, 6, 8, 0.78);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4, 16px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1),
                visibility 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.keyboard-modal-backdrop.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

/* Modal Dialog Box */
.keyboard-modal {
    position: relative;
    width: 100%;
    max-width: 580px;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    background: var(--bg-card, #0f1115);
    background: linear-gradient(145deg, rgba(20, 22, 28, 0.95), rgba(12, 14, 18, 0.98));
    border: 1px solid var(--border-glass, rgba(255, 255, 255, 0.1));
    border-radius: var(--radius-xl, 20px);
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.65),
                0 0 0 1px rgba(212, 175, 55, 0.12),
                0 0 32px rgba(212, 175, 55, 0.08);
    color: var(--text-primary, #f5f5f7);
    overflow: hidden;
    transform: scale(0.95) translateY(12px);
    transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    box-sizing: border-box;
}

.keyboard-modal-backdrop.is-open .keyboard-modal {
    transform: scale(1) translateY(0);
}

/* ------------------------------------------------------------------------------
 * 2. MODAL HEADER & CLOSE BUTTON
 * ------------------------------------------------------------------------------ */

.keyboard-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5, 20px) var(--space-6, 24px);
    border-bottom: 1px solid var(--border-glass, rgba(255, 255, 255, 0.08));
    background: rgba(255, 255, 255, 0.02);
}

.keyboard-header-title-group {
    display: flex;
    align-items: center;
    gap: var(--space-3, 12px);
}

.keyboard-modal-title {
    font-family: var(--font-display, 'Space Grotesk', sans-serif);
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--text-primary, #f5f5f7);
    margin: 0;
}

.keyboard-badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 8px;
    font-family: var(--font-mono, 'JetBrains Mono', monospace);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--gold-primary, #d4af37);
    background: rgba(212, 175, 55, 0.12);
    border: 1px solid rgba(212, 175, 55, 0.25);
    border-radius: var(--radius-full, 9999px);
}

/* 44px Minimum Touch Target Close Button */
.keyboard-close-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
    padding: 0;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-glass, rgba(255, 255, 255, 0.1));
    border-radius: 50%;
    color: var(--text-secondary, #9ca3af);
    cursor: pointer;
    transition: all 0.2s ease;
}

.keyboard-close-btn:hover,
.keyboard-close-btn:focus-visible {
    color: var(--text-primary, #ffffff);
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.2);
    transform: rotate(90deg);
    outline: none;
}

.keyboard-close-btn svg {
    width: 18px;
    height: 18px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* ------------------------------------------------------------------------------
 * 3. SHORTCUTS BODY & LISTINGS
 * ------------------------------------------------------------------------------ */

.keyboard-modal-body {
    flex: 1 1 auto;
    padding: var(--space-6, 24px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    display: flex;
    flex-direction: column;
    gap: var(--space-6, 24px);
}

.keyboard-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-3, 12px);
}

.keyboard-section-label {
    font-family: var(--font-mono, 'JetBrains Mono', monospace);
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--gold-primary, #d4af37);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.keyboard-section-label::after {
    content: '';
    flex: 1;
    height: 1px;
    background: rgba(255, 255, 255, 0.08);
}

.keyboard-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2, 8px) var(--space-4, 16px);
}

.keyboard-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: var(--radius-md, 10px);
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.keyboard-row:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(212, 175, 55, 0.2);
}

.keyboard-desc {
    font-size: 0.85rem;
    color: var(--text-secondary, #9ca3af);
    font-weight: 400;
}

.keyboard-row:hover .keyboard-desc {
    color: var(--text-primary, #ffffff);
}

/* Keycap Visual Pill (<kbd>) */
.keycap-group {
    display: flex;
    align-items: center;
    gap: 4px;
}

.keycap {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 26px;
    height: 24px;
    padding: 0 6px;
    font-family: var(--font-mono, 'JetBrains Mono', monospace);
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-primary, #f5f5f7);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.12) 0%, rgba(255, 255, 255, 0.04) 100%);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-bottom: 2px solid rgba(255, 255, 255, 0.28);
    border-radius: var(--radius-sm, 6px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
    text-shadow: 0 1px 1px rgba(0, 0, 0, 0.5);
    user-select: none;
    -webkit-user-select: none;
    box-sizing: border-box;
}

.keycap-separator {
    font-size: 0.75rem;
    color: var(--text-muted, #6b7280);
}

/* ------------------------------------------------------------------------------
 * 4. FOOTER NOTE & QUICK TOGGLE TRIGGER
 * ------------------------------------------------------------------------------ */

.keyboard-modal-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4, 16px) var(--space-6, 24px);
    border-top: 1px solid var(--border-glass, rgba(255, 255, 255, 0.08));
    background: rgba(0, 0, 0, 0.2);
    font-size: 0.75rem;
    color: var(--text-muted, #6b7280);
}

.keyboard-footer-hint {
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Floating Quick Help Pill */
.keyboard-quick-trigger {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    font-family: var(--font-mono, 'JetBrains Mono', monospace);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary, #9ca3af);
    background: rgba(20, 22, 28, 0.7);
    border: 1px solid var(--border-glass, rgba(255, 255, 255, 0.1));
    border-radius: var(--radius-full, 9999px);
    cursor: pointer;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: all 0.2s ease;
    min-height: 44px;
}

.keyboard-quick-trigger:hover {
    color: var(--gold-primary, #d4af37);
    border-color: rgba(212, 175, 55, 0.3);
    background: rgba(20, 22, 28, 0.9);
}

/* ------------------------------------------------------------------------------
 * 5. MOBILE-FIRST RESPONSIVENESS (< 768px & < 480px)
 * ------------------------------------------------------------------------------ */

@media (max-width: 768px) {
    .keyboard-modal-backdrop {
        padding: 0;
        align-items: flex-end;
    }

    .keyboard-modal {
        max-width: 100%;
        max-height: 80vh;
        border-bottom-left-radius: 0;
        border-bottom-right-radius: 0;
        border-left: none;
        border-right: none;
        border-bottom: none;
        transform: translateY(100%);
    }

    .keyboard-modal-backdrop.is-open .keyboard-modal {
        transform: translateY(0);
    }

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

    .keyboard-modal-header {
        padding: var(--space-4, 16px) var(--space-5, 20px);
    }

    .keyboard-modal-body {
        padding: var(--space-4, 16px) var(--space-5, 20px);
    }

    .keyboard-modal-footer {
        padding: var(--space-3, 12px) var(--space-5, 20px);
    }
}

@media (max-width: 480px) {
    .keyboard-modal {
        max-height: 85vh;
    }

    .keyboard-row {
        padding: 8px 10px;
    }

    .keyboard-desc {
        font-size: 0.8rem;
    }

    .keycap {
        min-width: 24px;
        height: 22px;
        font-size: 0.68rem;
    }
}