/**
 * Drum Sheet Viewer Styles
 * MuseScore-style PDF viewer for lead magnet pages
 *
 * @package HelloElementorChild
 * @since 1.0.0
 */

/* =============================================================================
   CSS Variables
   References central design system from variables.css with component-specific overrides.
   ============================================================================= */
:root {
    /* Component-specific aliases referencing design system */
    --dsv-primary: var(--dt-accent, #00f0ff);
    --dsv-primary-dark: var(--dt-accent-hover, #00c4d4);
    --dsv-primary-darker: #00a8b8;
    --dsv-bg: var(--dt-bg-dark, #151618);
    --dsv-bg-light: var(--dt-bg-elevated, #1c1d1f);
    --dsv-bg-lighter: var(--dt-bg-card-alt, #242528);
    --dsv-text: var(--dt-text-primary, #ffffff);
    --dsv-text-muted: var(--dt-text-hint, #9ca3af);
    --dsv-border: var(--dt-border-lighter, #2d2e32);
    --dsv-shadow: var(--dt-shadow-md, 0 4px 20px rgba(0, 0, 0, 0.4));
    --dsv-radius: var(--dt-radius-md, 8px);
    --dsv-radius-lg: var(--dt-radius-lg, 12px);
    --dsv-radius-pill: var(--dt-radius-pill, 9999px);
    --dsv-transition: var(--dt-transition-base, 0.2s ease);
    /* Component-specific layout values */
    --dsv-sidebar-width: 320px;
    --dsv-header-height: 60px;
    --dsv-mobile-bar-height: 80px;
    --dsv-site-header-height: 70px;
    /* Force cyan accent color for form elements (overrides iOS pink) */
    accent-color: var(--dt-accent, #00f0ff);
}

/* =============================================================================
   DrummerTube Header Integration
   ============================================================================= */
body.drum-sheet-viewer-page .dt-header {
    --dt-header-bg: var(--dsv-bg-light);
    --dt-header-border: var(--dsv-border);
}

/* =============================================================================
   Base Reset - High specificity to override resets
   ============================================================================= */
body.drum-sheet-viewer-page {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--dsv-bg);
    background-color: #151618;
    color: var(--dsv-text);
    color: #ffffff;
    line-height: 1.5;
    accent-color: #00f0ff;
    -webkit-tap-highlight-color: rgba(0, 240, 255, 0.2);
}

body.drum-sheet-viewer-page *,
body.drum-sheet-viewer-page *::before,
body.drum-sheet-viewer-page *::after {
    box-sizing: border-box;
}

/* =============================================================================
   Layout Container - Grid with sidebar
   ============================================================================= */
body.drum-sheet-viewer-page .dsv-container {
    display: grid;
    grid-template-columns: 1fr var(--dsv-sidebar-width);
}

/* =============================================================================
   Main Content Area (Scrollable)
   ============================================================================= */
body.drum-sheet-viewer-page .dsv-main {
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    background: var(--dsv-bg);
    background-color: #151618;
}

/* =============================================================================
   Header Bar (Fixed within main)
   ============================================================================= */
body.drum-sheet-viewer-page .dsv-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0 7%;
    height: var(--dsv-header-height);
    min-height: var(--dsv-header-height);
    background: var(--dsv-bg-light);
    background-color: #1c1d1f;
    border-bottom: 1px solid var(--dsv-border);
    border-bottom-color: #2d2e32;
    flex-shrink: 0;
}

body.drum-sheet-viewer-page .dsv-back-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--dsv-text);
    color: #ffffff;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--dsv-radius-pill);
    transition: background var(--dsv-transition), color var(--dsv-transition);
}

body.drum-sheet-viewer-page .dsv-back-link:hover {
    background: var(--dsv-bg-lighter);
    background-color: #242528;
    color: var(--dsv-primary);
    color: #00f0ff;
}

body.drum-sheet-viewer-page .dsv-back-link svg {
    flex-shrink: 0;
}

body.drum-sheet-viewer-page .dsv-zoom-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Zoom Buttons - Circular with centered icon */
body.drum-sheet-viewer-page .dsv-zoom-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    background: var(--dsv-bg-lighter);
    background-color: #242528;
    border: 1px solid var(--dsv-border);
    border-color: #2d2e32;
    border-radius: 50%;
    color: var(--dsv-text);
    color: #ffffff;
    cursor: pointer;
    transition: all var(--dsv-transition);
    -webkit-tap-highlight-color: rgba(0, 240, 255, 0.2);
    -webkit-appearance: none;
    appearance: none;
}

body.drum-sheet-viewer-page .dsv-zoom-btn:hover {
    background: var(--dsv-primary);
    background-color: #00f0ff;
    border-color: var(--dsv-primary);
    border-color: #00f0ff;
    color: var(--dsv-bg);
    color: #151618;
}

body.drum-sheet-viewer-page .dsv-zoom-btn:focus {
    outline: 2px solid var(--dsv-primary);
    outline-color: #00f0ff;
    outline-offset: 2px;
}

body.drum-sheet-viewer-page .dsv-zoom-btn:active {
    background: var(--dsv-primary-dark);
    background-color: #00c4d4;
    border-color: var(--dsv-primary-dark);
    border-color: #00c4d4;
    color: var(--dsv-bg);
    color: #151618;
}

body.drum-sheet-viewer-page .dsv-zoom-btn svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

body.drum-sheet-viewer-page .dsv-zoom-level {
    min-width: 50px;
    text-align: center;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--dsv-text-muted);
    color: #9ca3af;
}

/* =============================================================================
   PDF Viewer (Scrollable Area)
   ============================================================================= */
body.drum-sheet-viewer-page .dsv-viewer-wrap {
    flex: 1;
    overflow: auto;
    padding: 1.5rem;
    background: var(--dsv-bg);
    background-color: #151618;
}

body.drum-sheet-viewer-page .dsv-pdf-container {
    position: relative;
    width: 100%;
    min-height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

body.drum-sheet-viewer-page .dsv-canvas-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    padding: 1rem 0 2rem;
    width: 100%;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

body.drum-sheet-viewer-page .dsv-canvas-container canvas {
    max-width: 100%;
    height: auto;
    box-shadow: var(--dsv-shadow);
    border-radius: var(--dsv-radius);
    background: #fff;
    pointer-events: none;
}

/* Loading State */
body.drum-sheet-viewer-page .dsv-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    color: var(--dsv-text-muted);
    color: #9ca3af;
}

body.drum-sheet-viewer-page .dsv-loading.hidden {
    display: none;
}

body.drum-sheet-viewer-page .dsv-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--dsv-border);
    border-color: #2d2e32;
    border-top-color: var(--dsv-primary);
    border-top-color: #00f0ff;
    border-radius: 50%;
    animation: dsv-spin 0.8s linear infinite;
}

@keyframes dsv-spin {
    to {
        transform: rotate(360deg);
    }
}

/* No PDF State */
body.drum-sheet-viewer-page .dsv-no-pdf {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    text-align: center;
    color: var(--dsv-text-muted);
    color: #9ca3af;
    padding: 3rem 1rem;
}

body.drum-sheet-viewer-page .dsv-no-pdf svg {
    opacity: 0.5;
}

body.drum-sheet-viewer-page .dsv-no-pdf p {
    margin: 0;
    font-size: 1.1rem;
}

/* =============================================================================
   Sidebar (Sticky within grid)
   ============================================================================= */
body.drum-sheet-viewer-page .dsv-sidebar {
    position: sticky;
    top: var(--dsv-site-header-height);
    height: calc(100vh - var(--dsv-site-header-height));
    background: var(--dsv-bg-light);
    background-color: #1c1d1f;
    border-left: 1px solid var(--dsv-border);
    border-left-color: #2d2e32;
    overflow-y: auto;
    z-index: 10;
}

body.drum-sheet-viewer-page .dsv-sidebar-content {
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Song Info */
body.drum-sheet-viewer-page .dsv-song-info {
    text-align: center;
}

body.drum-sheet-viewer-page .dsv-thumbnail {
    
    width: 120px;
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: var(--dsv-radius-lg);
    margin-bottom: 1rem;
}

body.drum-sheet-viewer-page .dsv-song-title {
    margin: 0 0 0.25rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--dsv-text);
    color: #ffffff;
    line-height: 1.3;
}

/* "Drum Tab" suffix - lighter weight for SEO H1 */
body.drum-sheet-viewer-page .dsv-title-suffix {
    font-weight: 400;
    color: var(--dsv-text-muted);
    color: #9ca3af;
}

/* H2 Artist subtitle for SEO structure */
body.drum-sheet-viewer-page .dsv-artist-subtitle {
    margin: 0 0 0.75rem;
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--dsv-text-muted);
    color: #9ca3af;
    line-height: 1.4;
}

/* Legacy class - kept for backwards compatibility */
body.drum-sheet-viewer-page .dsv-artist {
    margin: 0 0 0.75rem;
    font-size: 1rem;
    color: var(--dsv-text-muted);
    color: #9ca3af;
}

/* Difficulty Bar - reuses song-card styles, only positioning overrides for sidebar */
body.drum-sheet-viewer-page .dsv-song-info .song-card__difficulty-wrap {
    margin-top: 1rem;
    max-width: 200px;
    margin-left: auto;
    margin-right: auto;
}

body.drum-sheet-viewer-page .dsv-song-info .song-card__difficulty-label {
    text-align: center;
}

/* Action Buttons */
body.drum-sheet-viewer-page .dsv-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

/* Download button spans full width */
body.drum-sheet-viewer-page .dsv-actions > button:first-child,
body.drum-sheet-viewer-page .dsv-actions > .dsv-btn-primary {
    grid-column: 1 / -1;
}

/* CTA Section */
body.drum-sheet-viewer-page .dsv-cta {
    padding-top: 1.5rem;
    border-top: 1px solid var(--dsv-border);
    border-top-color: #2d2e32;
    text-align: center;
}

body.drum-sheet-viewer-page .dsv-cta p {
    margin: 0 0 0.75rem;
    font-size: 0.9rem;
    color: var(--dsv-text-muted);
    color: #9ca3af;
}

/* =============================================================================
   Buttons - Pill Shaped
   ============================================================================= */
body.drum-sheet-viewer-page .dsv-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 500;
    border: none;
    border-radius: var(--dsv-radius-pill);
    cursor: pointer;
    transition: all var(--dsv-transition);
    text-decoration: none;
    font-family: inherit;
    -webkit-tap-highlight-color: rgba(0, 240, 255, 0.2);
    -webkit-appearance: none;
    appearance: none;
}

body.drum-sheet-viewer-page .dsv-btn:focus {
    outline: 2px solid var(--dsv-primary);
    outline-color: #00f0ff;
    outline-offset: 2px;
}

body.drum-sheet-viewer-page .dsv-btn-icon {
    padding: 0.5rem;
    background: transparent;
    color: var(--dsv-text);
    color: #ffffff;
    border-radius: var(--dsv-radius-pill);
}

body.drum-sheet-viewer-page .dsv-btn-icon:hover {
    background: var(--dsv-bg-lighter);
    background-color: #242528;
    color: var(--dsv-primary);
    color: #00f0ff;
}

body.drum-sheet-viewer-page .dsv-btn-primary {
    background: var(--dsv-primary);
    background-color: #00f0ff;
    color: var(--dsv-bg);
    color: #151618;
}

body.drum-sheet-viewer-page .dsv-btn-primary:hover {
    background: var(--dsv-primary-dark);
    background-color: #00c4d4;
    transform: translateY(-1px);
}

body.drum-sheet-viewer-page .dsv-btn-primary:active {
    transform: translateY(0);
    background: var(--dsv-primary-darker);
    background-color: #00a8b8;
}

body.drum-sheet-viewer-page .dsv-btn-secondary {
    background: transparent;
    color: var(--dsv-primary);
    color: #00f0ff;
    border: 1px solid var(--dsv-primary);
    border-color: #00f0ff;
}

body.drum-sheet-viewer-page .dsv-btn-secondary:hover {
    background: var(--dsv-primary);
    background-color: #00f0ff;
    color: var(--dsv-bg);
    color: #151618;
    border-color: var(--dsv-primary);
    border-color: #00f0ff;
}

body.drum-sheet-viewer-page .dsv-btn-secondary:active {
    background: var(--dsv-primary-dark);
    background-color: #00c4d4;
    color: var(--dsv-bg);
    color: #151618;
    border-color: var(--dsv-primary-dark);
    border-color: #00c4d4;
}

/* Accent button now uses primary color */
body.drum-sheet-viewer-page .dsv-btn-accent {
    background: var(--dsv-primary);
    background-color: #00f0ff;
    color: var(--dsv-bg);
    color: #151618;
}

body.drum-sheet-viewer-page .dsv-btn-accent:hover {
    background: var(--dsv-primary-darker);
    background-color: #00a8b8;
    transform: translateY(-1px);
}

body.drum-sheet-viewer-page .dsv-btn-accent:active {
    transform: translateY(0);
    background: var(--dsv-primary-darker);
    background-color: #00a8b8;
}

body.drum-sheet-viewer-page .dsv-btn-block {
    width: 100%;
}

/* =============================================================================
   Mobile Bottom Action Bar
   ============================================================================= */
body.drum-sheet-viewer-page .dsv-mobile-actions {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--dsv-mobile-bar-height);
    background: var(--dsv-bg-light);
    background-color: #1c1d1f;
    border-top: 1px solid var(--dsv-border);
    border-top-color: #2d2e32;
    padding: 0.75rem 1rem;
    padding-bottom: calc(0.75rem + env(safe-area-inset-bottom, 0));
    z-index: 100;
}

body.drum-sheet-viewer-page .dsv-mobile-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    flex: 1;
    padding: 0.5rem;
    background: transparent;
    border: none;
    color: var(--dsv-text-muted);
    color: #9ca3af;
    font-size: 0.7rem;
    font-family: inherit;
    cursor: pointer;
    transition: color var(--dsv-transition);
    border-radius: var(--dsv-radius);
    -webkit-tap-highlight-color: rgba(0, 240, 255, 0.2);
    -webkit-appearance: none;
    appearance: none;
}

body.drum-sheet-viewer-page .dsv-mobile-btn:hover,
body.drum-sheet-viewer-page .dsv-mobile-btn:focus {
    color: var(--dsv-primary);
    color: #00f0ff;
    outline: none;
}

body.drum-sheet-viewer-page .dsv-mobile-btn:active {
    color: var(--dsv-primary-dark);
    color: #00c4d4;
    background: rgba(0, 240, 255, 0.1);
}

body.drum-sheet-viewer-page .dsv-mobile-btn svg {
    width: 22px;
    height: 22px;
}

/* =============================================================================
   Modal
   ============================================================================= */
body.drum-sheet-viewer-page .dsv-modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    z-index: 1000;
}

body.drum-sheet-viewer-page .dsv-modal[hidden] {
    display: none;
}

body.drum-sheet-viewer-page .dsv-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
}

body.drum-sheet-viewer-page .dsv-modal-content {
    position: relative;
    width: 100%;
    max-width: 400px;
    background: var(--dsv-bg-light);
    background-color: #1c1d1f;
    border-radius: var(--dsv-radius-lg);
    padding: 2rem;
    box-shadow: var(--dsv-shadow);
    animation: dsv-modal-in 0.3s ease;
}

@keyframes dsv-modal-in {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

body.drum-sheet-viewer-page .dsv-modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.5rem;
    background: transparent;
    border: none;
    color: var(--dsv-text-muted);
    color: #9ca3af;
    cursor: pointer;
    border-radius: var(--dsv-radius-pill);
    transition: color var(--dsv-transition), background var(--dsv-transition);
}

body.drum-sheet-viewer-page .dsv-modal-close:hover {
    color: var(--dsv-text);
    color: #ffffff;
    background: var(--dsv-bg-lighter);
    background-color: #242528;
}

body.drum-sheet-viewer-page .dsv-modal-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

body.drum-sheet-viewer-page .dsv-modal-header svg {
    color: var(--dsv-primary);
    color: #00f0ff;
    margin-bottom: 1rem;
}

body.drum-sheet-viewer-page .dsv-modal-header h2 {
    margin: 0 0 0.5rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--dsv-text);
    color: #ffffff;
}

body.drum-sheet-viewer-page .dsv-modal-header p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--dsv-text-muted);
    color: #9ca3af;
}

/* Form */
body.drum-sheet-viewer-page .dsv-modal-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

body.drum-sheet-viewer-page .dsv-form-group {
    width: 100%;
}

body.drum-sheet-viewer-page .dsv-input {
    width: 100%;
    padding: 0.875rem 1.25rem;
    font-size: 1rem;
    font-family: inherit;
    background: var(--dsv-bg);
    background-color: #151618;
    border: 1px solid var(--dsv-border);
    border-color: #2d2e32;
    border-radius: var(--dsv-radius-pill);
    color: var(--dsv-text);
    color: #ffffff;
    transition: border-color var(--dsv-transition), box-shadow var(--dsv-transition);
}

body.drum-sheet-viewer-page .dsv-input::placeholder {
    color: var(--dsv-text-muted);
    color: #9ca3af;
}

body.drum-sheet-viewer-page .dsv-input:focus {
    outline: none;
    border-color: var(--dsv-primary);
    border-color: #00f0ff;
    box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.15);
}

body.drum-sheet-viewer-page .dsv-input:invalid:not(:placeholder-shown) {
    border-color: var(--dsv-primary);
    border-color: #00f0ff;
}

body.drum-sheet-viewer-page .dsv-modal-disclaimer {
    margin: 1rem 0 0;
    text-align: center;
    font-size: 0.8rem;
    color: var(--dsv-text-muted);
    color: #9ca3af;
}

/* Screen reader only */
body.drum-sheet-viewer-page .dsv-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* =============================================================================
   Share Popup
   ============================================================================= */
.dsv-share-popup {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    z-index: 1000;
}

.dsv-share-popup[hidden] {
    display: none;
}

.dsv-share-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
}

.dsv-share-content {
    position: relative;
    width: 100%;
    max-width: 520px;
    background: #1c1d1f;
    border-radius: 24px;
    padding: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    animation: dsv-modal-in 0.3s ease;
    border: 1px solid #00f0ff33;
}

.dsv-share-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.5rem;
    background: transparent !important;
    border: none !important;
    color: #ffffff !important;
    cursor: pointer;
    border-radius: 8px;
    transition: color 0.2s, opacity 0.2s;
}

.dsv-share-close:hover,
.dsv-share-close:focus,
.dsv-share-close:active {
    color: #ffffff !important;
    background: transparent !important;
    opacity: 0.7;
}

.dsv-share-close svg {
    stroke: currentColor !important;
}

.dsv-share-title {
    margin: 0 0 1.5rem;
    font-size: 1.15rem;
    font-weight: 600;
    color: #00f0ff;
    text-align: center;
}

.dsv-share-buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

.dsv-share-btn {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 0.4rem;
    aspect-ratio: 1;
    padding: 0.5rem;
    background: #242528;
    border: 1px solid #2d2e32;
    border-radius: 16px;
    color: #ffffff;
    text-decoration: none;
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
    -webkit-appearance: none;
    appearance: none;
}

.dsv-share-btn:hover {
    background: #00f0ff;
    border-color: #00f0ff;
    color: #151618;
    transform: translateY(-2px);
}

.dsv-share-btn svg {
    width: 24px;
    height: 24px;
}

/* Fix focus states - use electric blue instead of pink */
.dsv-share-btn:focus {
    outline: none;
    border-color: #00f0ff;
    box-shadow: 0 0 0 2px rgba(0, 240, 255, 0.3);
}

.dsv-share-close:focus {
    outline: none !important;
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.3) !important;
}

/* Mobile: constrain share dialog width */
@media (max-width: 560px) {
    .dsv-share-content {
        max-width: calc(100% - 2rem);
    }
}

/* =============================================================================
   Responsive: Large Desktop (1440px+)
   ============================================================================= */
@media (min-width: 1440px) {
    :root {
        --dsv-sidebar-width: 360px;
    }

    body.drum-sheet-viewer-page .dsv-thumbnail {
        max-width: 220px;
    }
}

/* =============================================================================
   Responsive: Tablet (1024px)
   ============================================================================= */
@media (max-width: 1024px) {
    :root {
        --dsv-sidebar-width: 280px;
    }

    body.drum-sheet-viewer-page .dsv-sidebar-content {
        padding: 1.5rem 1.25rem;
    }

    body.drum-sheet-viewer-page .dsv-thumbnail {
        max-width: 140px;
    }

    body.drum-sheet-viewer-page .dsv-song-title {
        font-size: 1.1rem;
    }
}

/* =============================================================================
   Responsive: Small Tablet (900px)
   ============================================================================= */
@media (max-width: 900px) {
    :root {
        --dsv-sidebar-width: 260px;
    }

    body.drum-sheet-viewer-page .dsv-sidebar-content {
        padding: 1.25rem 1rem;
        gap: 1.5rem;
    }

    body.drum-sheet-viewer-page .dsv-thumbnail {
        max-width: 120px;
    }

    body.drum-sheet-viewer-page .dsv-btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.9rem;
    }
}

/* =============================================================================
   Responsive: Mobile (768px)
   ============================================================================= */
@media (max-width: 768px) {
    body.drum-sheet-viewer-page {
        height: auto;
        min-height: 100vh;
        overflow: auto;
    }

    body.drum-sheet-viewer-page .dsv-container {
        display: flex;
        flex-direction: column;
        grid-template-columns: none;
        height: auto;
        min-height: 100vh;
    }

    body.drum-sheet-viewer-page .dsv-main {
        height: auto;
        min-height: calc(100vh - var(--dsv-mobile-bar-height));
        overflow: visible;
    }

    body.drum-sheet-viewer-page .dsv-sidebar {
        display: none;
    }

    body.drum-sheet-viewer-page .dsv-mobile-actions {
        display: flex;
        align-items: center;
        justify-content: space-around;
    }

    body.drum-sheet-viewer-page .dsv-viewer-wrap {
        flex: 1;
        padding: 1rem;
        padding-bottom: calc(1rem + var(--dsv-mobile-bar-height));
        overflow: visible;
    }

    body.drum-sheet-viewer-page .dsv-header {
        padding: 0 4%;
    }

    body.drum-sheet-viewer-page .dsv-back-link span {
        display: none;
    }

    body.drum-sheet-viewer-page .dsv-back-link {
        padding: 0.5rem;
    }

    body.drum-sheet-viewer-page .dsv-zoom-controls {
        gap: 0.25rem;
    }

    body.drum-sheet-viewer-page .dsv-modal-content {
        padding: 1.5rem;
        margin: 0 0.5rem;
    }
}

/* =============================================================================
   Responsive: Small Mobile (480px)
   ============================================================================= */
@media (max-width: 480px) {
    :root {
        --dsv-header-height: 54px;
        --dsv-mobile-bar-height: 70px;
    }

    body.drum-sheet-viewer-page .dsv-header {
        padding: 0 4%;
        gap: 0.5rem;
    }

    body.drum-sheet-viewer-page .dsv-zoom-level {
        min-width: 42px;
        font-size: 0.8rem;
    }

    body.drum-sheet-viewer-page .dsv-viewer-wrap {
        padding: 0.75rem;
        padding-bottom: calc(0.75rem + var(--dsv-mobile-bar-height));
    }

    body.drum-sheet-viewer-page .dsv-canvas-container {
        gap: 1rem;
    }

    body.drum-sheet-viewer-page .dsv-mobile-btn {
        font-size: 0.65rem;
    }

    body.drum-sheet-viewer-page .dsv-mobile-btn svg {
        width: 20px;
        height: 20px;
    }

    body.drum-sheet-viewer-page .dsv-modal-content {
        padding: 1.25rem;
    }

    body.drum-sheet-viewer-page .dsv-modal-header h2 {
        font-size: 1.1rem;
    }

    body.drum-sheet-viewer-page .dsv-input {
        padding: 0.75rem 1rem;
    }

    body.drum-sheet-viewer-page .dsv-btn {
        padding: 0.75rem 1rem;
    }

    body.drum-sheet-viewer-page .dsv-zoom-btn {
        width: 34px;
        height: 34px;
    }

    body.drum-sheet-viewer-page .dsv-zoom-btn svg {
        width: 16px;
        height: 16px;
    }
}

/* =============================================================================
   Responsive: Extra Small (360px)
   ============================================================================= */
@media (max-width: 360px) {
    body.drum-sheet-viewer-page .dsv-header {
        padding: 0 3%;
    }

    body.drum-sheet-viewer-page .dsv-zoom-controls {
        gap: 0.5rem;
    }

    body.drum-sheet-viewer-page .dsv-zoom-level {
        min-width: 38px;
    }

    body.drum-sheet-viewer-page .dsv-zoom-btn {
        width: 32px;
        height: 32px;
    }

    body.drum-sheet-viewer-page .dsv-zoom-btn svg {
        width: 14px;
        height: 14px;
    }
}

/* =============================================================================
   Landscape Mode on Mobile
   ============================================================================= */
@media (max-width: 900px) and (orientation: landscape) {
    :root {
        --dsv-header-height: 50px;
        --dsv-mobile-bar-height: 60px;
    }

    body.drum-sheet-viewer-page .dsv-mobile-btn {
        flex-direction: row;
        gap: 0.5rem;
    }

    body.drum-sheet-viewer-page .dsv-mobile-btn svg {
        width: 18px;
        height: 18px;
    }
}

/* =============================================================================
   Print Styles - Block native print
   ============================================================================= */
@media print {
    body.drum-sheet-viewer-page {
        display: none !important;
    }

    body.drum-sheet-viewer-page::after {
        content: 'Printing is disabled. Please use the Print button to access this feature.';
        display: block;
        padding: 2rem;
        text-align: center;
        font-size: 1.2rem;
    }
}

/* =============================================================================
   Safe Area Support (Notched Devices)
   ============================================================================= */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
    body.drum-sheet-viewer-page .dsv-mobile-actions {
        padding-bottom: calc(0.75rem + env(safe-area-inset-bottom));
    }

    body.drum-sheet-viewer-page .dsv-viewer-wrap {
        padding-bottom: calc(1rem + var(--dsv-mobile-bar-height) + env(safe-area-inset-bottom));
    }
}