@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500;600;700&family=Inter:wght@400;500;600;700&family=Outfit:wght@500;600;700;800&display=swap');

:root {
    --bg-main: #090d16;
    --bg-card: #131b2e;
    --bg-card-hover: #1c2742;
    --bg-sidebar: #0f172a;
    --border-color: #1e293b;
    --border-accent: rgba(139, 92, 246, 0.3);
    
    --primary: #8b5cf6;
    --primary-hover: #7c3aed;
    --primary-glow: rgba(139, 92, 246, 0.4);
    
    --accent-emerald: #10b981;
    --accent-sky: #38bdf8;
    --accent-amber: #f59e0b;
    --chord-color: #38bdf8;
    --chord-bg: rgba(56, 189, 248, 0.12);

    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-dim: #64748b;

    --font-heading: 'Outfit', -apple-system, sans-serif;
    --font-ui: 'Inter', -apple-system, sans-serif;
    --font-mono: 'Fira Code', monospace;

    --sidebar-width: 320px;
    --header-height: 70px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: var(--font-ui);
    line-height: 1.5;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Header */
.app-header {
    height: var(--header-height);
    background: rgba(15, 23, 42, 0.88);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    position: sticky;
    top: 0;
    z-index: 50;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    flex-shrink: 0;
}

.brand-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--primary), #4f46e5);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    box-shadow: 0 0 20px var(--primary-glow);
}

.brand-title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 800;
    background: linear-gradient(135deg, #ffffff 0%, #cbd5e1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.brand-subtitle {
    font-size: 0.75rem;
    color: var(--accent-emerald);
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

/* Instrument Switcher Bar */
.instrument-selector {
    display: flex;
    background: rgba(30, 41, 59, 0.6);
    padding: 4px;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    gap: 4px;
}

.inst-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-ui);
    font-weight: 600;
    font-size: 0.9rem;
    padding: 8px 18px;
    border-radius: 999px;
    cursor: pointer;
    transition: all 0.25s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.inst-icon-img {
    width: 24px;
    height: 24px;
    object-fit: contain;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.4));
    transition: transform 0.2s ease;
}

.inst-btn:hover .inst-icon-img,
.inst-btn.active .inst-icon-img {
    transform: scale(1.15);
}

.inst-btn:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.05);
}

.inst-btn.active {
    background: linear-gradient(135deg, var(--primary), #6366f1);
    color: #ffffff;
    box-shadow: 0 4px 14px var(--primary-glow);
}

.menu-toggle {
    display: none;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 8px 14px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 1.3rem;
}

/* App Container */
.app-container {
    display: flex;
    min-height: calc(100vh - var(--header-height));
}

/* Sidebar Menu Overlay on Mobile */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(4px);
    z-index: 44;
}

.sidebar-overlay.active {
    display: block;
}

/* Sidebar Menu */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar-search {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.search-box {
    position: relative;
}

.search-input {
    width: 100%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 10px 14px 10px 38px;
    color: var(--text-main);
    font-family: var(--font-ui);
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.2s;
}

.search-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-dim);
    font-size: 0.9rem;
}

/* Categories Tabs */
.category-tabs-container {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.category-tabs-header {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-dim);
    margin-bottom: 0.6rem;
}

.category-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.cat-tab {
    background: rgba(30, 41, 59, 0.6);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    font-family: var(--font-ui);
    font-size: 0.78rem;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 999px;
    cursor: pointer;
    transition: all 0.2s;
}

.cat-tab:hover {
    color: var(--text-main);
    border-color: var(--primary);
}

.cat-tab.active {
    background: linear-gradient(135deg, var(--primary), #6366f1);
    color: #ffffff;
    border-color: transparent;
    box-shadow: 0 2px 8px var(--primary-glow);
}

.song-list-container {
    flex: 1;
    overflow-y: auto;
    padding: 0.75rem 0.5rem;
}

.song-list-header {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-dim);
    padding: 0.5rem 0.75rem;
    margin-bottom: 0.25rem;
}

.song-item {
    padding: 12px 14px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.song-item:hover {
    background-color: var(--bg-card-hover);
}

.song-item.active {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.15), rgba(99, 102, 241, 0.1));
    border-left: 3px solid var(--primary);
}

.song-item-info {
    overflow: hidden;
}

.song-item-title {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-main);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.song-item-artist {
    font-size: 0.8rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.song-item-badge {
    background: rgba(56, 189, 248, 0.15);
    color: var(--accent-sky);
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 999px;
    flex-shrink: 0;
}

/* Main Content Area */
.main-content {
    flex: 1;
    padding: 1.5rem;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

.song-layout-grid {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.song-primary-column {
    flex: 1;
    min-width: 0;
}

.song-chords-column {
    width: 310px;
    flex-shrink: 0;
    position: sticky;
    top: calc(var(--header-height) + 1.5rem);
    max-height: calc(100vh - var(--header-height) - 3rem);
    overflow-y: auto;
}

.song-chords-column::-webkit-scrollbar {
    width: 5px;
}

.song-chords-column::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 999px;
}

/* Song Header Card */
.song-header-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    position: relative;
    overflow: hidden;
}

.song-header-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent-emerald), var(--accent-sky));
}

.song-header-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 1rem;
}

.song-category-badge {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 3px 10px;
    border-radius: 4px;
    background: rgba(139, 92, 246, 0.2);
    color: #c084fc;
    border: 1px solid rgba(192, 132, 252, 0.3);
    margin-bottom: 6px;
}

.song-title-main {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 800;
    color: #ffffff;
    line-height: 1.2;
}

.song-artist-main {
    font-size: 1.1rem;
    color: var(--accent-sky);
    font-weight: 500;
    margin-top: 4px;
}

.inst-active-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(139, 92, 246, 0.15);
    border: 1px solid var(--border-accent);
    color: #d8b4fe;
    font-size: 0.85rem;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: 999px;
}

/* Controls Bar (Transpose, Columns, Auto-scroll, Zoom, Print) */
.controls-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
    align-items: center;
    justify-content: space-between;
    margin-top: 1.25rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.control-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.control-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-ctrl {
    background: rgba(30, 41, 59, 0.8);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-family: var(--font-ui);
    font-weight: 600;
    font-size: 0.85rem;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 6px;
    min-height: 38px;
}

.btn-ctrl:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: #ffffff;
}

.btn-ctrl.active-col {
    background: var(--primary);
    border-color: var(--primary);
    color: #ffffff;
    box-shadow: 0 0 10px var(--primary-glow);
}

.transpose-value {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--accent-emerald);
    min-width: 32px;
    text-align: center;
}

.speed-slider {
    width: 80px;
    accent-color: var(--primary);
    cursor: pointer;
}

/* Chord Diagrams Panel (Right Sidebar on Desktop / Top Strip on Mobile) */
.chord-diagrams-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

.chord-diagrams-title {
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: var(--text-muted);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.chord-diagrams-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
    justify-content: center;
}

.chord-card-wrapper {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 6px;
    transition: transform 0.2s, border-color 0.2s;
    cursor: pointer;
    flex-shrink: 0;
}

.chord-card-wrapper:hover {
    transform: translateY(-3px);
    border-color: var(--primary);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
}

/* Chord Viewer / Sheet */
.cifra-viewer {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    font-family: var(--font-mono);
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-main);
    white-space: pre-wrap;
    word-break: break-word;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    overflow: visible;
}

/* Two Columns Layout for Desktop */
@media (min-width: 1024px) {
    .cifra-viewer.two-columns {
        column-count: 2;
        column-gap: 2.5rem;
        column-rule: 1px dashed rgba(148, 163, 184, 0.2);
    }
}

.cifra-stanza {
    break-inside: avoid-column;
    page-break-inside: avoid;
    margin-bottom: 1.25rem;
}

.cifra-line {
    display: block;
    min-height: 1.4em;
}

.cifra-chord-line {
    font-weight: 700;
    color: var(--chord-color);
}

.chord-badge {
    color: var(--chord-color);
    font-weight: 700;
    background: var(--chord-bg);
    padding: 2px 6px;
    border-radius: 4px;
    cursor: pointer;
    position: relative;
    display: inline-block;
    transition: all 0.15s ease;
}

.chord-badge:hover, .chord-badge.active-touch {
    background: var(--primary);
    color: #ffffff;
    box-shadow: 0 0 10px var(--primary-glow);
}

.section-tag {
    color: var(--accent-amber);
    font-weight: 700;
}

.tab-line {
    color: #a7f3d0;
    font-family: var(--font-mono);
}

/* Hover / Touch Tooltip Diagram */
.chord-tooltip {
    position: absolute;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-sidebar);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-md);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.9);
    padding: 6px;
    z-index: 120;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.2s, transform 0.2s;
}

/* Smart Tooltip Flip Down for chords near the top of the viewer */
.chord-tooltip.tooltip-bottom {
    bottom: auto;
    top: 130%;
}

.chord-badge:hover .chord-tooltip,
.chord-badge.active-touch .chord-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-5px);
}

.chord-badge:hover .chord-tooltip.tooltip-bottom,
.chord-badge.active-touch .chord-tooltip.tooltip-bottom {
    transform: translateX(-50%) translateY(5px);
}

/* Floating Auto-Scroll Control Widget */
.floating-scroll-widget {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: rgba(15, 23, 42, 0.92);
    backdrop-filter: blur(16px);
    border: 1px solid var(--primary);
    border-radius: 999px;
    padding: 10px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 8px 28px rgba(139, 92, 246, 0.4);
    z-index: 40;
    transition: all 0.3s;
}

.floating-scroll-widget.hidden {
    opacity: 0;
    pointer-events: none;
    transform: translateY(20px);
}

/* Mobile & Tablet Responsive Styles */
@media (max-width: 1024px) {
    .song-layout-grid {
        flex-direction: column;
    }

    .song-chords-column {
        width: 100%;
        position: static;
        max-height: none;
        order: -1;
    }

    .chord-diagrams-grid {
        flex-wrap: nowrap;
        overflow-x: auto;
        justify-content: flex-start;
        padding-bottom: 8px;
        -webkit-overflow-scrolling: touch;
    }

    .cifra-viewer.two-columns {
        column-count: 1;
    }
}

@media (max-width: 768px) {
    .app-header {
        padding: 0 1rem;
        gap: 0.5rem;
    }

    .brand-title {
        font-size: 1.1rem;
    }

    .brand-subtitle {
        display: none;
    }

    .instrument-selector {
        max-width: 50%;
        overflow-x: auto;
        white-space: nowrap;
        -webkit-overflow-scrolling: touch;
        padding: 2px;
    }

    .inst-btn {
        padding: 6px 12px;
        font-size: 0.8rem;
        gap: 4px;
    }

    .menu-toggle {
        display: block;
    }

    .sidebar {
        width: 85%;
        max-width: 320px;
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        z-index: 50;
        transform: translateX(-100%);
        box-shadow: 10px 0 30px rgba(0, 0, 0, 0.5);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .category-tabs {
        flex-wrap: nowrap;
        overflow-x: auto;
        padding-bottom: 4px;
        -webkit-overflow-scrolling: touch;
    }

    .cat-tab {
        flex-shrink: 0;
    }

    .main-content {
        padding: 1rem 0.75rem;
    }

    .song-header-card {
        padding: 1.25rem 1rem;
    }

    .song-title-main {
        font-size: 1.5rem;
    }

    .song-artist-main {
        font-size: 0.95rem;
    }

    .controls-bar {
        gap: 0.6rem;
        justify-content: flex-start;
    }

    .control-group {
        background: rgba(30, 41, 59, 0.4);
        padding: 4px 8px;
        border-radius: var(--radius-sm);
        border: 1px solid var(--border-color);
    }

    .control-group:has(#btnCol1) {
        display: none;
    }

    .cifra-viewer {
        padding: 1.25rem 1rem;
        font-size: 14px;
    }

    .floating-scroll-widget {
        bottom: 1rem;
        left: 50%;
        right: auto;
        transform: translateX(-50%);
        width: calc(100% - 2rem);
        max-width: 380px;
        justify-content: space-between;
        padding: 8px 16px;
    }

    .floating-scroll-widget.hidden {
        transform: translateX(-50%) translateY(30px);
    }
}

/* Print Styles Optimization */
@media print {
    /* Hide non-printable navigation, toolbar and floating controls */
    .app-header, 
    .sidebar, 
    .controls-bar, 
    .floating-scroll-widget, 
    .sidebar-overlay,
    .menu-toggle {
        display: none !important;
    }

    body {
        background: #ffffff !important;
        color: #000000 !important;
        padding: 0 !important;
        margin: 0 !important;
    }

    .main-content {
        max-width: 100% !important;
        padding: 0 !important;
        margin: 0 !important;
    }

    .song-layout-grid {
        display: block !important;
    }

    /* Compact Printed Header */
    .song-header-card {
        background: #ffffff !important;
        border: 1px solid #cbd5e1 !important;
        border-radius: 8px !important;
        padding: 0.6rem 1rem !important;
        margin-bottom: 0.75rem !important;
        box-shadow: none !important;
        page-break-inside: avoid !important;
    }

    .song-header-card::before {
        display: none !important;
    }

    .song-title-main {
        font-size: 1.4rem !important;
        color: #000000 !important;
        line-height: 1.2 !important;
    }

    .song-artist-main {
        font-size: 0.95rem !important;
        color: #334155 !important;
        margin-top: 2px !important;
    }

    .song-category-badge {
        background: #f1f5f9 !important;
        color: #334155 !important;
        border: 1px solid #94a3b8 !important;
        font-size: 0.7rem !important;
    }

    .inst-active-badge {
        background: #f8fafc !important;
        color: #0f172a !important;
        border: 1px solid #cbd5e1 !important;
        font-size: 0.8rem !important;
        padding: 4px 10px !important;
    }

    .inst-icon-img {
        width: 18px !important;
        height: 18px !important;
        filter: none !important;
    }

    /* Show Selected Instrument Chord Diagrams in Printed Document */
    .song-chords-column {
        display: block !important;
        width: 100% !important;
        position: static !important;
        max-height: none !important;
        margin-bottom: 0.85rem !important;
        page-break-inside: avoid !important;
    }

    .chord-diagrams-section {
        background: #ffffff !important;
        border: 1px solid #e2e8f0 !important;
        border-radius: 8px !important;
        padding: 0.6rem 0.85rem !important;
        box-shadow: none !important;
    }

    .chord-diagrams-title {
        color: #000000 !important;
        font-size: 0.85rem !important;
        border-bottom: 1px solid #cbd5e1 !important;
        padding-bottom: 0.35rem !important;
        margin-bottom: 0.5rem !important;
    }

    .chord-diagrams-grid {
        display: flex !important;
        flex-wrap: wrap !important;
        justify-content: flex-start !important;
        gap: 0.5rem !important;
    }

    .chord-card-wrapper {
        background: #ffffff !important;
        border: 1px solid #cbd5e1 !important;
        padding: 4px !important;
        border-radius: 6px !important;
    }

    .chord-card-wrapper svg {
        filter: contrast(140%);
    }

    /* Printed Cifra Sheet & 2 Columns Support */
    .cifra-viewer {
        background: #ffffff !important;
        color: #000000 !important;
        border: none !important;
        box-shadow: none !important;
        padding: 0 !important;
        font-size: 13px !important;
    }

    /* Keep 2-column layout in print if 2 columns mode is enabled */
    .cifra-viewer.two-columns {
        column-count: 2 !important;
        column-gap: 2rem !important;
        column-rule: 1px solid #cbd5e1 !important;
    }

    .cifra-stanza {
        break-inside: avoid-column !important;
        page-break-inside: avoid !important;
        margin-bottom: 1rem !important;
    }

    .cifra-chord-line, .chord-badge {
        color: #0284c7 !important;
        background: none !important;
        font-weight: bold !important;
        padding: 0 !important;
    }

    .chord-tooltip {
        display: none !important;
    }
}