/* ===== VARIABLES ===== */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a24;
    --bg-hover: #222230;
    --bg-glass: rgba(18, 18, 26, 0.7);
    --bg-glass-border: rgba(255, 255, 255, 0.08);

    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #606070;

    --accent-primary: #10b981;
    --accent-secondary: #059669;
    --accent-glow: rgba(16, 185, 129, 0.3);
    --accent-gradient: linear-gradient(135deg, #10b981 0%, #059669 100%);

    --danger: #ef4444;
    --danger-glow: rgba(239, 68, 68, 0.3);
    --warning: #f59e0b;
    --info: #3b82f6;
    --info-glow: rgba(59, 130, 246, 0.3);

    /* Cores por seção */
    --section-intro: #8b5cf6;
    --section-verso: #3b82f6;
    --section-refrao: #10b981;
    --section-ponte: #f59e0b;
    --section-final: #ef4444;

    --border-color: #2a2a3a;
    --border-radius: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

    --sidebar-width: 260px;
    --header-height: 60px;

    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px var(--accent-glow);
}

/* ===== RESET ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    background-image:
        radial-gradient(ellipse at top left, rgba(16, 185, 129, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at bottom right, rgba(59, 130, 246, 0.05) 0%, transparent 50%);
    color: var(--text-primary);
    line-height: 1.6;
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== APP LAYOUT ===== */
#app {
    display: flex;
    height: 100vh;
}

/* ===== SIDEBAR ===== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid var(--bg-glass-border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: var(--transition-slow);
}

.sidebar-header {
    padding: 28px 24px;
    border-bottom: 1px solid var(--bg-glass-border);
    background: linear-gradient(180deg, rgba(16, 185, 129, 0.05) 0%, transparent 100%);
}

.logo {
    font-size: 26px;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 2px;
}

.logo span {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-nav {
    padding: 20px 16px;
    flex: 1;
}

.nav-item {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 6px;
    position: relative;
    overflow: hidden;
}

.nav-item svg {
    width: 20px;
    height: 20px;
    transition: var(--transition);
}

.nav-item::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--accent-gradient);
    opacity: 0;
    transition: var(--transition);
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    transform: translateX(4px);
}

.nav-item:hover svg {
    transform: scale(1.1);
}

.nav-item:active {
    transform: translateX(4px) scale(0.98);
}

.nav-item.active {
    background: var(--accent-gradient);
    color: var(--bg-primary);
    box-shadow: var(--shadow-glow);
}

.nav-item.active::before {
    opacity: 0;
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--bg-glass-border);
    background: rgba(0, 0, 0, 0.2);
}

.shortcuts-hint {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 12px;
    margin-bottom: 8px;
}

.shortcuts-hint:last-child {
    margin-bottom: 0;
}

.key {
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-hover) 100%);
    padding: 4px 10px;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 11px;
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* ===== MAIN CONTENT ===== */
.main-content {
    flex: 1;
    overflow-y: auto;
    padding: 40px;
    scroll-behavior: smooth;
}

.main-content::-webkit-scrollbar {
    width: 10px;
}

.main-content::-webkit-scrollbar-track {
    background: transparent;
}

.main-content::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 5px;
    border: 2px solid var(--bg-primary);
}

.main-content::-webkit-scrollbar-thumb:hover {
    background: var(--bg-hover);
}

.view {
    display: none;
    animation: fadeSlideIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.view.active {
    display: block;
}

@keyframes fadeSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

/* ===== SEARCH VIEW ===== */
.search-hero {
    text-align: center;
    padding: 80px 0 60px;
}

.search-hero h2 {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 12px;
    letter-spacing: -1px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.search-hero p {
    color: var(--text-secondary);
    font-size: 18px;
    margin-bottom: 40px;
    font-weight: 400;
}

.search-box {
    display: flex;
    max-width: 680px;
    margin: 0 auto;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--bg-glass-border);
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
}

.search-box:focus-within {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-lg), 0 0 0 4px var(--accent-glow);
    transform: translateY(-2px);
}

.search-icon {
    width: 24px;
    height: 24px;
    margin: 18px 16px 18px 20px;
    color: var(--text-muted);
    flex-shrink: 0;
    transition: var(--transition);
}

.search-box:focus-within .search-icon {
    color: var(--accent-primary);
}

.search-box input {
    flex: 1;
    padding: 18px 0;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 17px;
    font-family: var(--font-sans);
    outline: none;
    font-weight: 400;
}

.search-box input::placeholder {
    color: var(--text-muted);
}

.search-btn {
    padding: 18px 36px;
    background: var(--accent-gradient);
    color: var(--bg-primary);
    border: none;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.search-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(255,255,255,0.2) 50%, transparent 100%);
    transform: translateX(-100%);
    transition: var(--transition-slow);
}

.search-btn:hover::before {
    transform: translateX(100%);
}

.search-btn:hover {
    filter: brightness(1.1);
    box-shadow: var(--shadow-glow);
}

.search-btn:active {
    transform: scale(0.98);
}

.quick-searches {
    margin-top: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.quick-searches span {
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 500;
}

.quick-searches button {
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.quick-searches button:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: rgba(16, 185, 129, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
}

.quick-searches button:active {
    transform: translateY(0);
}

/* ===== SEARCH RESULTS ===== */
.search-results {
    display: none;
    max-width: 800px;
    margin: 0 auto;
    animation: fadeSlideIn 0.3s ease;
}

.search-results.active {
    display: block;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.results-header h3 {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.3px;
}

.results-count {
    color: var(--text-muted);
    font-size: 14px;
    background: var(--bg-tertiary);
    padding: 6px 14px;
    border-radius: 20px;
}

.result-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px;
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--bg-glass-border);
    border-radius: var(--border-radius-lg);
    margin-bottom: 10px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.result-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--accent-gradient);
    transform: scaleY(0);
    transition: var(--transition);
}

.result-item:hover {
    border-color: rgba(16, 185, 129, 0.3);
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
    background: rgba(16, 185, 129, 0.05);
}

.result-item:hover::before {
    transform: scaleY(1);
}

.result-item:active {
    transform: translateX(8px) scale(0.99);
}

.result-info h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.result-info p {
    color: var(--text-secondary);
    font-size: 14px;
}

.result-arrow {
    color: var(--accent-primary);
    font-size: 24px;
    opacity: 0;
    transform: translateX(-10px);
    transition: var(--transition);
}

.result-item:hover .result-arrow {
    opacity: 1;
    transform: translateX(0);
}

/* ===== VIEW HEADER ===== */
.view-header {
    margin-bottom: 36px;
}

.view-header h2 {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 10px;
    letter-spacing: -0.5px;
}

.view-header p {
    color: var(--text-secondary);
    font-size: 15px;
}

/* ===== FAVORITES & HISTORY ===== */
.favorites-list,
.history-list {
    display: grid;
    gap: 12px;
}

.song-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px;
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--bg-glass-border);
    border-radius: var(--border-radius-lg);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.song-item::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--border-radius-lg);
    padding: 1px;
    background: linear-gradient(135deg, transparent 0%, rgba(16, 185, 129, 0.3) 100%);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: var(--transition);
}

.song-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.song-item:hover::after {
    opacity: 1;
}

.song-item-info h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 6px;
}

.song-item-info p {
    color: var(--text-secondary);
    font-size: 14px;
}

.song-item-actions {
    display: flex;
    gap: 8px;
    opacity: 0.6;
    transition: var(--transition);
}

.song-item:hover .song-item-actions {
    opacity: 1;
}

.song-item-btn {
    padding: 10px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.song-item-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: rgba(16, 185, 129, 0.1);
    transform: scale(1.1);
}

.song-item-btn:active {
    transform: scale(0.95);
}

.song-item-btn.danger:hover {
    border-color: var(--danger);
    color: var(--danger);
    background: rgba(239, 68, 68, 0.1);
}

/* ===== CIFRA VIEW ===== */
.cifra-toolbar {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--bg-glass-border);
    border-radius: var(--border-radius-lg);
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.toolbar-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.toolbar-btn svg {
    width: 18px;
    height: 18px;
    transition: var(--transition);
}

.toolbar-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: rgba(16, 185, 129, 0.1);
    transform: translateY(-2px);
}

.toolbar-btn:hover svg {
    transform: scale(1.1);
}

.toolbar-btn:active {
    transform: translateY(0) scale(0.98);
}

.toolbar-btn.primary {
    background: var(--accent-gradient);
    border-color: transparent;
    color: var(--bg-primary);
    box-shadow: var(--shadow-glow);
}

.toolbar-btn.primary:hover {
    filter: brightness(1.1);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--accent-glow);
}

.toolbar-btn.icon-btn {
    padding: 12px;
}

.toolbar-btn.icon-btn.favorited {
    background: rgba(245, 158, 11, 0.15);
    border-color: var(--warning);
}

.toolbar-btn.icon-btn.favorited svg {
    fill: var(--warning);
    stroke: var(--warning);
    animation: pulse 0.5s ease;
}

.cifra-info {
    flex: 1;
    min-width: 200px;
}

.cifra-info h2 {
    font-size: 26px;
    font-weight: 700;
    letter-spacing: -0.3px;
    margin-bottom: 4px;
}

.cifra-info span {
    color: var(--text-secondary);
    font-size: 15px;
}

.toolbar-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.transpose-control {
    display: flex;
    align-items: center;
    gap: 4px;
    background: rgba(255, 255, 255, 0.03);
    padding: 6px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.transpose-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: none;
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 20px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.transpose-btn:hover {
    background: var(--accent-gradient);
    color: var(--bg-primary);
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

.transpose-btn:active {
    transform: scale(0.95);
}

.transpose-value {
    padding: 0 16px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
}

.transpose-value strong {
    color: var(--accent-primary);
    font-weight: 700;
    font-size: 16px;
    font-family: var(--font-mono);
}

/* ===== CIFRA SETTINGS ===== */
.cifra-settings {
    display: flex;
    gap: 24px;
    padding: 20px 24px;
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--bg-glass-border);
    border-radius: var(--border-radius-lg);
    margin-bottom: 24px;
}

.setting-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.setting-item label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.setting-item select,
.setting-item input {
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 14px;
    font-family: var(--font-sans);
    transition: var(--transition);
}

.setting-item select:focus,
.setting-item input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.bpm-control {
    display: flex;
    align-items: center;
    gap: 4px;
}

.bpm-control button {
    width: 36px;
    height: 40px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 18px;
    cursor: pointer;
    transition: var(--transition);
}

.bpm-control button:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: rgba(16, 185, 129, 0.1);
}

.bpm-control input {
    width: 70px;
    text-align: center;
}

/* ===== CIFRA CONTENT ===== */
.cifra-content {
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--bg-glass-border);
    border-radius: var(--border-radius-lg);
    padding: 32px;
    font-family: var(--font-mono);
    line-height: 2.2;
    overflow-x: hidden;
    overflow-y: auto;
    font-size: 15px;
    max-height: calc(100vh - 350px);
    scroll-behavior: smooth;
}

.cifra-section {
    margin-bottom: 32px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--border-radius);
    border-left: 3px solid var(--section-verso);
}

/* Cores por seção */
.cifra-section[data-section*="intro"],
.cifra-section[data-section*="Intro"] {
    border-left-color: var(--section-intro);
}

.cifra-section[data-section*="verso"],
.cifra-section[data-section*="Verso"] {
    border-left-color: var(--section-verso);
}

.cifra-section[data-section*="refr"],
.cifra-section[data-section*="Refr"],
.cifra-section[data-section*="coro"],
.cifra-section[data-section*="Coro"] {
    border-left-color: var(--section-refrao);
}

.cifra-section[data-section*="ponte"],
.cifra-section[data-section*="Ponte"],
.cifra-section[data-section*="bridge"],
.cifra-section[data-section*="Bridge"] {
    border-left-color: var(--section-ponte);
}

.cifra-section[data-section*="final"],
.cifra-section[data-section*="Final"],
.cifra-section[data-section*="outro"],
.cifra-section[data-section*="Outro"] {
    border-left-color: var(--section-final);
}

.cifra-section-name {
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.cifra-section-name::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
}

.cifra-line {
    margin-bottom: 12px;
}

.cifra-chords {
    color: var(--accent-primary);
    font-weight: 700;
    white-space: pre-wrap;
    word-break: break-word;
    font-size: 17px;
    letter-spacing: 0.5px;
    text-shadow: 0 0 20px var(--accent-glow);
    overflow-wrap: break-word;
}

.cifra-lyrics {
    color: var(--text-primary);
    white-space: pre-wrap;
    word-break: break-word;
    font-weight: 400;
    opacity: 0.9;
    overflow-wrap: break-word;
}

/* ===== PERFORMANCE MODE ===== */
.performance-mode {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    background-image:
        radial-gradient(ellipse at center, rgba(16, 185, 129, 0.03) 0%, transparent 70%);
    z-index: 1000;
    flex-direction: column;
}

.performance-mode.active {
    display: flex;
    animation: fadeSlideIn 0.3s ease;
}

.perf-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--bg-glass-border);
}

.perf-info-left h2 {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.3px;
}

.perf-info-left span {
    color: var(--text-secondary);
    font-size: 14px;
}

.beat-indicator {
    display: flex;
    gap: 14px;
}

.beat-dot {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    transition: all 0.1s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid transparent;
}

.beat-dot.active {
    background: var(--danger);
    transform: scale(1.5);
    box-shadow: 0 0 30px var(--danger-glow);
    border-color: rgba(255, 255, 255, 0.3);
}

.beat-dot.first.active {
    background: var(--accent-primary);
    box-shadow: 0 0 30px var(--accent-glow);
}

.perf-info-right {
    display: flex;
    align-items: center;
    gap: 24px;
}

.perf-bpm {
    background: var(--accent-gradient);
    color: var(--bg-primary);
    padding: 10px 20px;
    border-radius: 25px;
    font-weight: 700;
    font-size: 16px;
    box-shadow: var(--shadow-glow);
}

.perf-counter {
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 14px;
}

/* ===== PERFORMANCE BODY ===== */
.perf-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    text-align: center;
    position: relative;
}

.perf-section-name {
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 24px;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
}

.perf-current {
    margin-bottom: 48px;
}

.perf-chord {
    font-size: 140px;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 60px var(--accent-glow));
    font-family: var(--font-mono);
    line-height: 1;
    margin-bottom: 24px;
    transition: transform 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: -2px;
}

.perf-chord.pulse {
    transform: scale(1.08);
    filter: drop-shadow(0 0 100px var(--accent-glow));
}

.perf-lyric {
    font-size: 46px;
    font-weight: 500;
    color: var(--text-primary);
    max-width: 1000px;
    line-height: 1.4;
    letter-spacing: -0.5px;
}

.perf-next {
    opacity: 0.5;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
    transition: var(--transition);
}

.perf-next:hover {
    opacity: 0.8;
}

.perf-next-label {
    color: var(--text-muted);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 12px;
    font-weight: 600;
}

.perf-next-chord {
    font-size: 40px;
    font-weight: 700;
    color: var(--accent-primary);
    font-family: var(--font-mono);
    margin-bottom: 10px;
}

.perf-next-lyric {
    font-size: 22px;
    color: var(--text-secondary);
}

.perf-progress {
    position: absolute;
    bottom: 130px;
    left: 60px;
    right: 60px;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    overflow: hidden;
}

.perf-progress-bar {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 3px;
    transition: width 0.1s linear;
    box-shadow: 0 0 20px var(--accent-glow);
}

/* ===== PERFORMANCE CONTROLS ===== */
.perf-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    padding: 28px;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--bg-glass-border);
}

.perf-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
}

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

.perf-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: rgba(16, 185, 129, 0.1);
    transform: scale(1.1);
}

.perf-btn:active {
    transform: scale(0.95);
}

.perf-btn.play-btn {
    width: 80px;
    height: 80px;
    background: var(--accent-gradient);
    border-color: transparent;
    color: var(--bg-primary);
    box-shadow: var(--shadow-glow);
}

.perf-btn.play-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 0 40px var(--accent-glow);
}

.perf-btn.play-btn .icon-pause {
    display: none;
}

.perf-btn.play-btn.playing .icon-play {
    display: none;
}

.perf-btn.play-btn.playing .icon-pause {
    display: block;
}

.perf-btn.close-btn {
    width: auto;
    padding: 0 24px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 600;
}

.perf-btn.metronome-btn {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.03);
}

.perf-btn.metronome-btn.active {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: rgba(16, 185, 129, 0.15);
}

.perf-btn.metronome-btn:not(.active) {
    opacity: 0.5;
}

.perf-btn.metronome-btn svg {
    width: 20px;
    height: 20px;
}

/* Beat indicator accent animation */
.beat-indicator.accent {
    transform: scale(1.1);
}

.beat-indicator {
    transition: transform 0.1s ease;
}

.perf-shortcuts {
    display: flex;
    justify-content: center;
    gap: 40px;
    padding: 14px;
    background: rgba(0, 0, 0, 0.3);
    color: var(--text-muted);
    font-size: 12px;
}

.perf-shortcuts kbd {
    background: var(--bg-tertiary);
    padding: 5px 10px;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 11px;
    margin: 0 3px;
    border: 1px solid var(--border-color);
}

/* ===== LOADING OVERLAY ===== */
.loading-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(10px);
    z-index: 2000;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
}

.loading-overlay.active {
    display: flex;
    animation: fadeSlideIn 0.2s ease;
}

.loading-spinner {
    width: 56px;
    height: 56px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

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

.loading-overlay p {
    color: var(--text-secondary);
    font-size: 16px;
    font-weight: 500;
}

/* Loading Skeleton */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--bg-tertiary) 0%,
        var(--bg-hover) 50%,
        var(--bg-tertiary) 100%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 8px;
}

.skeleton-text {
    height: 16px;
    margin-bottom: 8px;
}

.skeleton-title {
    height: 24px;
    width: 60%;
    margin-bottom: 12px;
}

/* ===== EMPTY STATE ===== */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-muted);
}

.empty-state svg {
    width: 72px;
    height: 72px;
    margin-bottom: 20px;
    opacity: 0.3;
    stroke-width: 1.5;
}

.empty-state h4 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--text-secondary);
    font-weight: 600;
}

.empty-state p {
    font-size: 14px;
    max-width: 300px;
    margin: 0 auto;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-hover);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ===== MOBILE BOTTOM NAVIGATION ===== */
.mobile-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--bg-glass-border);
    padding: 10px 8px;
    padding-bottom: max(env(safe-area-inset-bottom, 10px), 10px);
    z-index: 100;
}

.mobile-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    padding: 10px 6px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 10px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border-radius: 12px;
    position: relative;
}

.mobile-nav-item svg {
    width: 22px;
    height: 22px;
    transition: var(--transition);
}

.mobile-nav-item.active {
    color: var(--accent-primary);
    background: rgba(16, 185, 129, 0.1);
}

.mobile-nav-item.active svg {
    transform: scale(1.1);
}

.mobile-nav-item:active {
    transform: scale(0.92);
}

/* ===== PWA INSTALL BANNER ===== */
.install-banner {
    display: none;
    position: fixed;
    bottom: 80px;
    left: 16px;
    right: 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 16px;
    align-items: center;
    gap: 16px;
    z-index: 200;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.install-banner.show {
    display: flex;
}

.install-content {
    flex: 1;
}

.install-content span {
    font-weight: 600;
    font-size: 16px;
}

.install-content p {
    color: var(--text-muted);
    font-size: 13px;
    margin-top: 4px;
}

.install-btn {
    padding: 10px 20px;
    background: var(--accent-primary);
    color: var(--bg-primary);
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
}

.install-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 24px;
    cursor: pointer;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    body {
        background-image: none;
    }

    .sidebar {
        display: none;
    }

    .mobile-nav {
        display: flex;
    }

    .main-content {
        padding: 20px;
        padding-bottom: 90px;
    }

    .search-hero {
        padding: 40px 0 30px;
    }

    .search-hero h2 {
        font-size: 28px;
        letter-spacing: -0.5px;
    }

    .search-hero p {
        font-size: 14px;
        margin-bottom: 24px;
    }

    .search-box {
        flex-direction: column;
        border-radius: var(--border-radius-lg);
    }

    .search-box input {
        padding: 16px 18px;
        font-size: 16px;
    }

    .search-icon {
        display: none;
    }

    .search-btn {
        padding: 16px;
        border-radius: 0 0 14px 14px;
    }

    .quick-searches {
        gap: 8px;
        margin-top: 20px;
    }

    .quick-searches button {
        font-size: 12px;
        padding: 8px 14px;
    }

    .view-header h2 {
        font-size: 26px;
    }

    .result-item {
        padding: 16px 18px;
    }

    .result-item::before {
        display: none;
    }

    .cifra-toolbar {
        padding: 12px;
        gap: 10px;
        border-radius: var(--border-radius);
        flex-direction: column;
        align-items: stretch;
    }

    .cifra-info {
        min-width: 100%;
        text-align: center;
    }

    .cifra-info h2 {
        font-size: 18px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .cifra-info span {
        font-size: 13px;
    }

    .toolbar-actions {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
        gap: 8px;
    }

    .toolbar-btn {
        padding: 8px 12px;
        font-size: 12px;
        flex: 0 0 auto;
    }

    .toolbar-btn.primary {
        flex: 1 0 100%;
        justify-content: center;
    }

    .transpose-control {
        flex: 1 0 100%;
        justify-content: center;
    }

    .cifra-settings {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 10px;
        padding: 12px;
    }

    .cifra-settings .setting-item {
        flex: 1 1 45%;
        min-width: 140px;
    }

    .cifra-settings .setting-item label {
        font-size: 10px;
    }

    .cifra-settings .setting-item select,
    .cifra-settings .setting-item input {
        padding: 8px 10px;
        font-size: 13px;
    }

    .bpm-control button {
        width: 32px;
        height: 36px;
    }

    .bpm-control input {
        width: 50px;
    }

    .cifra-content {
        font-size: 13px;
        padding: 16px;
        line-height: 1.8;
        max-height: calc(100vh - 280px);
        overflow-x: hidden;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .cifra-section {
        padding: 12px;
        margin-bottom: 16px;
        overflow: hidden;
    }

    .cifra-chords {
        font-size: 14px;
        white-space: pre-wrap;
        word-break: break-all;
        overflow-wrap: anywhere;
    }

    .cifra-lyrics {
        font-size: 13px;
        white-space: pre-wrap;
        word-break: break-word;
        overflow-wrap: anywhere;
    }

    .cifra-line {
        max-width: 100%;
        overflow: hidden;
    }

    /* Performance Mobile */
    .perf-header {
        padding: 14px 20px;
        flex-wrap: wrap;
        gap: 10px;
    }

    .perf-info-left h2 {
        font-size: 17px;
    }

    .perf-body {
        padding: 24px;
    }

    .perf-chord {
        font-size: 72px;
        letter-spacing: -1px;
    }

    .perf-lyric {
        font-size: 24px;
        line-height: 1.5;
    }

    .perf-section-name {
        font-size: 11px;
        padding: 6px 14px;
    }

    .perf-next {
        padding-top: 24px;
    }

    .perf-next-chord {
        font-size: 32px;
    }

    .perf-next-lyric {
        font-size: 16px;
    }

    .perf-progress {
        bottom: 110px;
        left: 20px;
        right: 20px;
        height: 4px;
    }

    .perf-controls {
        padding: 18px;
        gap: 14px;
    }

    .perf-btn {
        width: 48px;
        height: 48px;
    }

    .perf-btn.play-btn {
        width: 64px;
        height: 64px;
    }

    .perf-shortcuts {
        display: none;
    }

    .beat-bar {
        padding: 12px;
    }

    .beat-dot {
        width: 20px;
        height: 20px;
    }

    /* Results */
    .result-item {
        padding: 14px 16px;
    }

    .result-info h4 {
        font-size: 15px;
    }

    /* View Header */
    .view-header h2 {
        font-size: 24px;
    }

    /* Install banner position */
    .install-banner {
        bottom: 90px;
    }
}

/* Extra small screens */
@media (max-width: 380px) {
    .perf-chord {
        font-size: 48px;
    }

    .perf-lyric {
        font-size: 18px;
    }

    .search-hero h2 {
        font-size: 20px;
    }
}

/* Landscape mode */
@media (max-height: 500px) and (orientation: landscape) {
    .perf-body {
        padding: 10px 20px;
    }

    .perf-chord {
        font-size: 50px;
        margin-bottom: 10px;
    }

    .perf-lyric {
        font-size: 20px;
        margin-bottom: 20px;
    }

    .perf-next {
        display: none;
    }

    .perf-controls {
        padding: 10px;
    }

    .beat-bar {
        padding: 8px;
    }
}

/* PWA Standalone Mode */
@media (display-mode: standalone) {
    .install-banner {
        display: none !important;
    }
}

/* ===== BIBLIOTECA VIEW ===== */
.view-header-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    flex-wrap: wrap;
}

.library-actions {
    display: flex;
    gap: 8px;
}

.library-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 20px;
    text-align: center;
}

.stat-card.accent {
    border-color: var(--accent-primary);
    background: rgba(16, 185, 129, 0.1);
}

.stat-value {
    font-size: 32px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.stat-card.accent .stat-value {
    color: var(--accent-primary);
}

.stat-label {
    font-size: 13px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.library-search {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.library-search input {
    flex: 1;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 15px;
    font-family: var(--font-sans);
}

.library-search input:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.library-search select {
    padding: 12px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
}

.library-list {
    display: grid;
    gap: 10px;
}

.library-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.library-item:hover {
    border-color: var(--accent-primary);
}

.library-item-info {
    flex: 1;
    cursor: pointer;
    min-width: 0;
}

.library-item-info h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.library-item-info p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 4px;
}

.library-item-date {
    font-size: 12px;
    color: var(--text-muted);
}

.library-item-actions {
    display: flex;
    gap: 8px;
    margin-left: 16px;
}

/* ===== INDICADOR DE CIFRA SALVA ===== */
.result-item.cached::before,
.library-item::before {
    content: '';
    width: 4px;
    height: 100%;
    background: var(--accent-primary);
    position: absolute;
    left: 0;
    top: 0;
    border-radius: 4px 0 0 4px;
}

.result-item {
    position: relative;
}

.result-item.cached {
    border-left: 3px solid var(--accent-primary);
}

.cached-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    color: var(--accent-primary);
    background: rgba(16, 185, 129, 0.15);
    padding: 2px 8px;
    border-radius: 10px;
    margin-left: 8px;
}

.cached-badge svg {
    width: 12px;
    height: 12px;
}

/* ===== CIFRA HEADER COM INDICADOR ===== */
.cifra-source {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    padding: 4px 10px;
    border-radius: 12px;
    margin-left: 12px;
}

.cifra-source.from-cache {
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-primary);
}

.cifra-source.from-online {
    background: rgba(59, 130, 246, 0.15);
    color: #3b82f6;
}

/* ===== SIDEBAR TOGGLE ===== */
.sidebar-toggle {
    position: fixed;
    top: 16px;
    left: var(--sidebar-width);
    z-index: 150;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    transform: translateX(-50%);
}

.sidebar-toggle:hover {
    background: var(--bg-hover);
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

.sidebar-toggle svg {
    width: 16px;
    height: 16px;
}

.sidebar.hidden {
    transform: translateX(-100%);
    opacity: 0;
    pointer-events: none;
}

#app.sidebar-hidden .sidebar-toggle {
    left: 16px;
    transform: translateX(0);
}

#app.sidebar-hidden .main-content {
    margin-left: 0;
}

/* ===== REPERTÓRIO PANEL ===== */
.repertorio-panel {
    padding: 16px;
    border-top: 1px solid var(--border-color);
    max-height: 280px;
    overflow-y: auto;
}

.repertorio-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.repertorio-header h4 {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.repertorio-counter {
    font-size: 12px;
    color: var(--accent-primary);
    font-weight: 600;
    background: rgba(16, 185, 129, 0.15);
    padding: 2px 8px;
    border-radius: 10px;
}

.repertorio-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.repertorio-empty {
    text-align: center;
    padding: 16px;
    color: var(--text-muted);
    font-size: 13px;
}

.repertorio-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
}

.repertorio-item:hover {
    background: var(--bg-hover);
}

.repertorio-item.active {
    border-color: var(--accent-primary);
    background: rgba(16, 185, 129, 0.1);
}

.repertorio-item-info {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    min-width: 0;
}

.repertorio-num {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: 50%;
    font-size: 11px;
    font-weight: 700;
    color: var(--accent-primary);
    flex-shrink: 0;
}

.repertorio-item.active .repertorio-num {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

.repertorio-item-text {
    min-width: 0;
}

.repertorio-item-text h5 {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.repertorio-item-text p {
    font-size: 11px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.repertorio-remove {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 4px;
    opacity: 0;
    transition: var(--transition);
}

.repertorio-item:hover .repertorio-remove {
    opacity: 1;
}

.repertorio-remove:hover {
    background: var(--danger);
    color: white;
}

.repertorio-actions {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
}

.repertorio-clear-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    width: 100%;
    padding: 8px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-muted);
    font-size: 12px;
    cursor: pointer;
    transition: var(--transition);
    justify-content: center;
}

.repertorio-clear-btn:hover {
    border-color: var(--danger);
    color: var(--danger);
}

/* ===== PREMIUM BANNER ===== */
.premium-banner {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 16px;
    padding: 14px 16px;
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.15) 0%, rgba(245, 158, 11, 0.08) 100%);
    border: 1px solid rgba(251, 191, 36, 0.3);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.premium-banner:hover {
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.25) 0%, rgba(245, 158, 11, 0.15) 100%);
    border-color: rgba(251, 191, 36, 0.5);
    transform: translateY(-2px);
}

.premium-banner-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    border-radius: 10px;
    font-size: 18px;
    color: white;
    box-shadow: 0 4px 12px rgba(251, 191, 36, 0.3);
}

.premium-banner-text {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.premium-banner-text strong {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.premium-banner-text span {
    font-size: 12px;
    color: var(--text-muted);
}

.premium-banner svg {
    color: var(--text-muted);
    transition: transform 0.3s ease;
}

.premium-banner:hover svg {
    transform: translateX(4px);
    color: #fbbf24;
}

/* Hide premium banner for premium users */
.is-premium .premium-banner {
    display: none;
}

/* Premium Badge */
.premium-badge {
    display: none;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    color: white;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.premium-badge::before {
    content: '★';
    font-size: 10px;
}

/* Premium status on user button */
.user-btn .premium-star {
    color: #fbbf24;
    font-size: 12px;
    margin-left: 4px;
}

/* ===== REPERTÓRIO NAVIGATION ===== */
.repertorio-nav {
    display: none;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    margin-left: auto;
}

.repertorio-nav.visible {
    display: flex;
}

.rep-nav-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.rep-nav-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.rep-nav-btn svg {
    width: 18px;
    height: 18px;
}

.rep-nav-info {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    min-width: 40px;
    text-align: center;
}

/* ===== TOAST NOTIFICATION ===== */
.toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(100px) scale(0.9);
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    color: var(--text-primary);
    padding: 14px 28px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--bg-glass-border);
    z-index: 3000;
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.toast::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--accent-primary);
    border-radius: 50%;
    animation: pulse 1s infinite;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0) scale(1);
}

.toast.error::before {
    background: var(--danger);
}

.toast.success::before {
    background: var(--accent-primary);
}

/* ===== TOOLBAR BUTTON REPERTÓRIO ===== */
.toolbar-btn.repertorio-btn {
    background: var(--bg-tertiary);
}

.toolbar-btn.repertorio-btn:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: var(--bg-primary);
}

/* ===== AUTO SCROLL BUTTON ===== */
#autoScrollBtn.active {
    background: var(--accent-gradient);
    border-color: transparent;
    color: var(--bg-primary);
    animation: pulse-glow 2s infinite;
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 0 5px var(--accent-glow);
    }
    50% {
        box-shadow: 0 0 20px var(--accent-glow), 0 0 30px var(--accent-glow);
    }
}

/* ===== MOBILE IMPROVEMENTS ===== */
@media (max-width: 768px) {
    .sidebar-toggle {
        display: none;
    }

    .repertorio-panel {
        display: none;
    }

    /* Library Mobile */
    .library-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
    }

    .stat-card {
        padding: 12px;
    }

    .stat-value {
        font-size: 24px;
    }

    .stat-label {
        font-size: 11px;
    }

    .library-search {
        flex-direction: column;
        gap: 8px;
    }

    .library-actions {
        width: 100%;
        justify-content: flex-end;
    }

    .view-header-row {
        flex-direction: column;
    }

    .library-item {
        padding: 12px 14px;
    }

    .library-item-info h4 {
        font-size: 14px;
    }

    .cifra-source {
        display: none;
    }

    .toolbar-actions {
        flex-wrap: wrap;
        gap: 8px;
    }

    .toolbar-btn {
        padding: 8px 12px;
        font-size: 13px;
    }

    .toolbar-btn.icon-btn {
        padding: 8px;
    }

    .toolbar-btn svg {
        width: 16px;
        height: 16px;
    }

    .repertorio-nav {
        width: 100%;
        justify-content: center;
        margin: 10px 0 0 0;
    }

    .repertorio-nav.visible {
        display: flex;
    }

    /* Mobile Repertório Bottom Bar */
    .mobile-repertorio {
        display: none;
        position: fixed;
        bottom: 60px;
        left: 0;
        right: 0;
        background: linear-gradient(180deg, var(--bg-secondary) 0%, rgba(18, 18, 26, 0.98) 100%);
        border-top: 1px solid var(--accent-primary);
        padding: 10px 16px;
        z-index: 99;
        justify-content: space-between;
        align-items: center;
        box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.3);
    }

    .mobile-repertorio.visible {
        display: flex;
    }

    .mobile-repertorio-info {
        display: flex;
        align-items: center;
        gap: 10px;
        flex: 1;
        min-width: 0;
    }

    .mobile-repertorio-info span {
        font-size: 13px;
        color: var(--bg-primary);
        font-weight: 700;
        background: var(--accent-primary);
        padding: 2px 8px;
        border-radius: 10px;
        flex-shrink: 0;
    }

    .mobile-repertorio-title {
        font-size: 14px;
        font-weight: 500;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        color: var(--text-primary);
    }

    .mobile-repertorio-btns {
        display: flex;
        gap: 8px;
    }

    .mobile-repertorio-btns button {
        width: 40px;
        height: 40px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: var(--bg-tertiary);
        border: 1px solid var(--border-color);
        border-radius: 8px;
        color: var(--text-primary);
        cursor: pointer;
        transition: var(--transition);
    }

    .mobile-repertorio-btns button:active {
        background: var(--accent-primary);
        border-color: var(--accent-primary);
        color: var(--bg-primary);
        transform: scale(0.95);
    }

    /* Ajusta padding quando repertório mobile está visível */
    .main-content:has(~ .mobile-repertorio.visible) {
        padding-bottom: 140px;
    }

    /* Navegação mobile adicional para repertório */
    .mobile-nav-item#mobileAddRep {
        color: var(--accent-primary);
    }

    .toast {
        bottom: 140px;
        left: 16px;
        right: 16px;
        transform: translateX(0) translateY(100px);
    }

    .toast.show {
        transform: translateX(0) translateY(0);
    }
}

/* ===== PERFORMANCE MOBILE OPTIMIZATIONS ===== */
@media (max-width: 768px) {
    .perf-info-center {
        order: -1;
        width: 100%;
        justify-content: center;
        margin-bottom: 8px;
    }

    .beat-indicator {
        gap: 8px;
    }

    .beat-dot {
        width: 12px;
        height: 12px;
    }

    .perf-progress {
        bottom: 100px;
        left: 16px;
        right: 16px;
    }

    /* Touch-friendly controls */
    .perf-controls {
        gap: 8px;
        padding: 12px;
    }

    .perf-btn {
        touch-action: manipulation;
    }

    .perf-btn:active {
        transform: scale(0.95);
    }
}

/* ===== TOUCH OPTIMIZATIONS ===== */
@media (pointer: coarse) {
    .toolbar-btn,
    .nav-item,
    .result-item,
    .song-item,
    .repertorio-item {
        min-height: 44px;
    }

    .transpose-btn,
    .rep-nav-btn {
        min-width: 44px;
        min-height: 44px;
    }

    .search-btn {
        min-height: 48px;
    }
}

/* ===== SMOOTH SCROLLING ===== */
html {
    scroll-behavior: smooth;
}

.main-content,
.cifra-content,
.repertorio-panel {
    -webkit-overflow-scrolling: touch;
}

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

/* ===== USER SECTION ===== */
.user-section {
    position: relative;
    margin-top: 0.5rem;
}

.user-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s;
    width: 100%;
}

.user-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.user-btn svg {
    width: 18px;
    height: 18px;
}

.user-btn.logged-in {
    color: var(--primary);
    border-color: var(--primary);
}

.user-menu {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.5rem;
    display: none;
    z-index: 100;
    box-shadow: var(--shadow-lg);
}

.user-menu.show {
    display: block;
    animation: fadeSlideIn 0.2s ease;
}

.user-menu button {
    display: block;
    width: 100%;
    padding: 0.6rem 0.75rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    text-align: left;
    cursor: pointer;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    transition: all 0.2s;
}

.user-menu button:hover {
    background: var(--bg-glass);
    color: var(--text-primary);
}

.user-info {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 0.5rem;
}

.user-name {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
}

.user-role {
    display: block;
    font-size: 0.75rem;
    color: var(--primary);
    text-transform: uppercase;
}

/* ===== AUTH MODAL ===== */
.auth-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
}

.auth-modal.show {
    display: flex;
    animation: fadeIn 0.2s ease;
}

.auth-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
}

.auth-container {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    width: 90%;
    max-width: 400px;
    box-shadow: var(--shadow-lg);
    animation: scaleIn 0.3s ease;
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.auth-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
    padding: 0.25rem;
    transition: color 0.2s;
}

.auth-close:hover {
    color: var(--text-primary);
}

.auth-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.auth-header h2 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.auth-header p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 0.4rem;
}

.form-group input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.form-group input::placeholder {
    color: var(--text-muted);
}

.auth-error {
    color: #ef4444;
    font-size: 0.85rem;
    margin-bottom: 1rem;
    padding: 0.5rem;
    background: rgba(239, 68, 68, 0.1);
    border-radius: var(--radius-sm);
    display: none;
}

.auth-error.show {
    display: block;
}

.auth-submit {
    width: 100%;
    padding: 0.875rem;
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.auth-submit:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.auth-submit:active {
    transform: translateY(0);
}

.auth-switch {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.auth-switch a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

.auth-switch a:hover {
    text-decoration: underline;
}

/* ===== TOAST ===== */
.toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.875rem 1.5rem;
    color: var(--text-primary);
    font-size: 0.9rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 3000;
    max-width: 90%;
}

.toast.show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.toast.success {
    border-color: var(--primary);
    background: rgba(16, 185, 129, 0.1);
}

.toast.error {
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

/* ===== AUTH PROMPT BUTTON ===== */
.auth-prompt-btn {
    margin-top: 1rem;
    padding: 0.75rem 1.5rem;
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.auth-prompt-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* ===== AUTH MOBILE ===== */
@media (max-width: 768px) {
    .auth-container {
        padding: 1.5rem;
        margin: 1rem;
    }

    .user-section {
        display: none;
    }

    /* Add user button to mobile nav */
    .mobile-nav::after {
        content: none;
    }
}

/* ===== MODAL BASE STYLES ===== */
.modal {
    position: fixed;
    inset: 0;
    z-index: 5000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.95) translateY(20px);
    transition: transform 0.3s ease;
}

.modal.show .modal-content {
    transform: scale(1) translateY(0);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 20px;
    cursor: pointer;
    transition: all 0.2s ease;
    z-index: 10;
}

.modal-close:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* Premium Modal Specific */
.premium-modal-content {
    max-width: 420px;
    text-align: center;
    padding: 32px;
}

.premium-header {
    margin-bottom: 24px;
}

.premium-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: white;
    margin: 0 auto 16px;
    box-shadow: 0 4px 20px rgba(251, 191, 36, 0.4);
}

.premium-header h2 {
    font-size: 28px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.premium-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

.premium-price {
    margin-bottom: 24px;
}

.price-value {
    font-size: 48px;
    font-weight: 800;
    color: var(--accent-primary);
}

.price-period {
    font-size: 18px;
    color: var(--text-muted);
}

.premium-features-list {
    list-style: none;
    text-align: left;
    margin-bottom: 24px;
    padding: 0;
}

.premium-features-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    font-size: 15px;
    color: var(--text-secondary);
}

.btn-subscribe {
    width: 100%;
    padding: 16px 24px;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-subscribe:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--accent-glow);
}

.premium-guarantee {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 16px;
    font-size: 13px;
    color: var(--text-muted);
}

/* Payment Modal */
.payment-modal-content {
    max-width: 400px;
    text-align: center;
    padding: 32px;
}

.payment-header h2 {
    font-size: 24px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.payment-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

.payment-amount {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    background: var(--bg-glass);
    border-radius: 12px;
    margin: 20px 0;
}

.payment-amount strong {
    font-size: 24px;
    color: var(--accent-primary);
}

.pix-qrcode {
    padding: 24px;
    background: white;
    border-radius: 12px;
    margin-bottom: 20px;
}

.qr-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.pix-code-container {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.pix-code-container input {
    flex: 1;
    padding: 12px;
    background: var(--bg-glass);
    border: 1px solid var(--bg-glass-border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 11px;
    font-family: monospace;
}

.btn-copy {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--bg-glass);
    border: 1px solid var(--bg-glass-border);
    border-radius: 8px;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-copy:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

.payment-expiry {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 13px;
    margin-bottom: 20px;
}

.btn-confirm-payment {
    width: 100%;
    padding: 14px 24px;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-confirm-payment:hover {
    background: var(--accent-secondary);
}

.payment-note {
    margin-top: 16px;
    font-size: 12px;
    color: var(--text-muted);
}

/* Premium Lock */
.premium-only.locked {
    opacity: 0.5;
    pointer-events: none;
    position: relative;
}

.premium-lock {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    background: #fbbf24;
    border-radius: 4px;
    margin-left: 6px;
    font-size: 10px;
    color: white;
}

/* Confetti Animation */
@keyframes confetti-fall {
    to {
        transform: translateY(100vh) rotate(720deg);
        opacity: 0;
    }
}

.confetti {
    position: fixed;
    width: 10px;
    height: 10px;
    z-index: 10000;
    border-radius: 50%;
    pointer-events: none;
}

/* ===== PERFORMANCE MODE - TOM ===== */
.perf-key {
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-primary);
    background: rgba(16, 185, 129, 0.15);
    padding: 6px 12px;
    border-radius: 8px;
    border: 1px solid rgba(16, 185, 129, 0.3);
    margin-bottom: 4px;
}

/* ===== AUTO SCROLL INDICATOR ===== */
.scroll-speed-indicator {
    display: none;
    margin-left: 8px;
    font-size: 11px;
    font-weight: 700;
    padding: 2px 6px;
    background: var(--accent-primary);
    color: var(--bg-primary);
    border-radius: 4px;
}

#autoScrollBtn.active .scroll-speed-indicator {
    display: inline-block;
    animation: pulse-indicator 1s ease-in-out infinite;
}

@keyframes pulse-indicator {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* ===== PREMIUM BANNER ANIMATION ===== */
.premium-banner {
    animation: premium-glow 3s ease-in-out infinite;
}

@keyframes premium-glow {
    0%, 100% {
        box-shadow: 0 0 0 rgba(251, 191, 36, 0);
        border-color: rgba(251, 191, 36, 0.3);
    }
    50% {
        box-shadow: 0 0 20px rgba(251, 191, 36, 0.2);
        border-color: rgba(251, 191, 36, 0.6);
    }
}

.premium-banner:hover {
    animation: none;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(251, 191, 36, 0.3);
}

.premium-banner-icon {
    animation: star-rotate 4s linear infinite;
}

@keyframes star-rotate {
    0% { transform: rotate(0deg); }
    25% { transform: rotate(10deg) scale(1.1); }
    50% { transform: rotate(0deg); }
    75% { transform: rotate(-10deg) scale(1.1); }
    100% { transform: rotate(0deg); }
}

/* ===== MOBILE TOUCH TARGETS IMPROVEMENTS ===== */
@media (max-width: 768px) {
    /* Botões maiores para toque */
    .toolbar-btn {
        min-height: 44px;
        min-width: 44px;
        padding: 10px 14px;
    }

    .toolbar-btn.icon-btn {
        min-width: 48px;
        min-height: 48px;
    }

    .transpose-btn {
        min-width: 44px;
        min-height: 44px;
        font-size: 20px;
    }

    /* Performance mode controls maiores */
    .perf-btn {
        min-width: 56px;
        min-height: 56px;
    }

    .perf-btn.play-btn {
        min-width: 72px;
        min-height: 72px;
    }

    /* Nav items mais espaçados */
    .mobile-nav-item {
        min-height: 52px;
        padding: 8px 12px;
    }

    /* Resultados de busca com mais espaço */
    .result-item {
        padding: 16px;
        min-height: 72px;
    }

    /* Botões de repertório maiores */
    .rep-nav-btn {
        min-width: 48px;
        min-height: 48px;
    }

    /* Performance header ajustes */
    .perf-header {
        padding: 12px 16px;
    }

    .perf-key {
        font-size: 12px;
        padding: 4px 8px;
    }

    .perf-bpm {
        font-size: 14px;
    }
}

/* ===== FEEDBACK VISUAL MELHORADO ===== */
.toolbar-btn:active,
.perf-btn:active,
.mobile-nav-item:active,
.result-item:active {
    transform: scale(0.95);
    transition: transform 0.1s ease;
}

/* Loading state para botões */
.btn-loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}

.btn-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Ripple effect */
.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    transform: scale(0);
    animation: ripple-effect 0.6s linear;
    pointer-events: none;
}

@keyframes ripple-effect {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* Success/Error states */
.state-success {
    background: var(--accent-primary) !important;
    color: white !important;
}

.state-error {
    background: var(--danger) !important;
    color: white !important;
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* ===== SKELETON LOADER ===== */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--bg-tertiary) 25%,
        var(--bg-hover) 50%,
        var(--bg-tertiary) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: 8px;
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-text {
    height: 16px;
    margin-bottom: 8px;
}

.skeleton-text:last-child {
    width: 60%;
}

.skeleton-title {
    height: 24px;
    width: 70%;
    margin-bottom: 12px;
}

.skeleton-item {
    pointer-events: none;
}

.skeleton-item .result-info {
    flex: 1;
}

.cifra-skeleton {
    padding: 20px;
}

.cifra-line-skeleton {
    margin-bottom: 8px;
}

/* ===== SCROLL PROGRESS BAR ===== */
.cifra-scroll-progress {
    position: fixed;
    bottom: 70px;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 4px;
    background: rgba(255,255,255,0.1);
    border-radius: 2px;
    z-index: 100;
    display: none;
}

.cifra-scroll-progress.visible {
    display: block;
}

.cifra-scroll-progress-bar {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 2px;
    transition: width 0.1s ease;
}

@media (max-width: 768px) {
    .cifra-scroll-progress {
        bottom: 120px;
        width: 150px;
    }
}

/* ===== ONBOARDING MODAL ===== */
.onboarding-modal {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.onboarding-modal.show {
    display: flex;
}

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

.onboarding-content {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--bg-glass-border);
    border-radius: var(--border-radius-xl);
    padding: 40px;
    max-width: 400px;
    width: 100%;
    text-align: center;
    animation: slideUp 0.4s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.onboarding-slides {
    min-height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.onboarding-slide {
    display: none;
    flex-direction: column;
    align-items: center;
    animation: fadeInSlide 0.3s ease;
}

.onboarding-slide.active {
    display: flex;
}

@keyframes fadeInSlide {
    from { opacity: 0; transform: translateX(20px); }
    to { opacity: 1; transform: translateX(0); }
}

.onboarding-icon {
    width: 80px;
    height: 80px;
    background: var(--accent-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    box-shadow: 0 8px 30px var(--accent-glow);
}

.onboarding-icon svg {
    width: 40px;
    height: 40px;
    color: white;
}

.onboarding-icon.perf {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.4);
}

.onboarding-icon.repertorio {
    background: linear-gradient(135deg, #8b5cf6 0%, #6d28d9 100%);
    box-shadow: 0 8px 30px rgba(139, 92, 246, 0.4);
}

.onboarding-icon.premium {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    box-shadow: 0 8px 30px rgba(251, 191, 36, 0.4);
}

.onboarding-icon.premium span {
    font-size: 40px;
    color: white;
}

.onboarding-slide h2 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.onboarding-slide p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 300px;
}

.onboarding-dots {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin: 24px 0;
}

.onboarding-dots .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--bg-hover);
    cursor: pointer;
    transition: var(--transition);
}

.onboarding-dots .dot.active {
    background: var(--accent-primary);
    transform: scale(1.2);
}

.onboarding-dots .dot:hover {
    background: var(--accent-secondary);
}

.onboarding-actions {
    display: flex;
    gap: 12px;
    justify-content: space-between;
}

.onboarding-skip {
    padding: 12px 24px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.onboarding-skip:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.onboarding-next {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--accent-gradient);
    border: none;
    border-radius: 10px;
    color: white;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.onboarding-next:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px var(--accent-glow);
}

@media (max-width: 480px) {
    .onboarding-content {
        padding: 30px 24px;
    }

    .onboarding-icon {
        width: 64px;
        height: 64px;
    }

    .onboarding-icon svg {
        width: 32px;
        height: 32px;
    }

    .onboarding-slide h2 {
        font-size: 20px;
    }

    .onboarding-slide p {
        font-size: 14px;
    }
}