/* ==========================================================================
   tab-with.me - Modern Guitar Tab App Styles
   Mobile-First Design
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Reset & Base Styles
   -------------------------------------------------------------------------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette - Warm Amber/Gold Theme */
    --primary-color: #f59e0b;
    --primary-dark: #d97706;
    --secondary-color: #64748b;
    --accent-color: #fbbf24;
    --success-color: #10b981;
    --danger-color: #ef4444;

    /* Neutrals - Light Mode */
    --bg-color: #f8fafc;
    --surface-color: #ffffff;
    --border-color: #e2e8f0;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
    --font-mono: 'Courier New', 'Consolas', 'Monaco', monospace;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-full: 9999px;

    /* Heights */
    --header-height: 90px;
    --bottom-nav-height: 90px;
}

/* Dark Mode Theme - Matches Auth Pages */
body.dark-mode {
    --bg-color: #1a1a1a;
    --surface-color: #2d2d2d;
    --border-color: #404040;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #6b7280;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.3);
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    position: relative;
}

/* Subtle angled line background pattern */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: repeating-linear-gradient(
        -15deg,
        transparent,
        transparent 12px,
        rgba(var(--text-muted-rgb, 107, 114, 128), 0.03) 12px,
        rgba(var(--text-muted-rgb, 107, 114, 128), 0.03) 14px
    );
    pointer-events: none;
    z-index: 0;
}

body.dark-mode::before {
    background-image: repeating-linear-gradient(
        -15deg,
        transparent,
        transparent 12px,
        rgba(255, 255, 255, 0.02) 12px,
        rgba(255, 255, 255, 0.02) 14px
    );
}

#app {
    position: relative;
    z-index: 1;
}

/* --------------------------------------------------------------------------
   App Container
   -------------------------------------------------------------------------- */
#app {
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.app-header {
    height: var(--header-height);
    background: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    box-shadow: var(--shadow-md);
    position: relative;
    z-index: 100;
}

.app-logo {
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    letter-spacing: -0.5px;
    margin: 0;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.icon-btn {
    width: 52px;
    height: 52px;
    background: rgba(255, 255, 255, 0.15);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    text-decoration: none;
}

.icon-btn svg {
    width: 28px;
    height: 28px;
}

.icon-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

.icon-btn:active {
    transform: translateY(0);
}

#settings-btn:hover {
    transform: translateY(-2px) rotate(45deg);
}

#settings-btn:active {
    transform: translateY(0) rotate(45deg) scale(0.95);
}

.settings-btn {
    width: 52px;
    height: 52px;
    background: rgba(255, 255, 255, 0.15);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.settings-btn svg {
    width: 28px;
    height: 28px;
}

.settings-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: rotate(45deg);
}

.settings-btn:active {
    transform: rotate(45deg) scale(0.95);
}

/* Settings Modal */
.settings-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}

.settings-modal.active {
    display: flex;
}

.settings-content {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.settings-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.settings-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.close-btn {
    width: 36px;
    height: 36px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

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

.settings-body {
    padding: var(--spacing-lg);
}

.setting-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    background: var(--bg-color);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.setting-item:last-child {
    margin-bottom: 0;
}

.setting-info {
    margin-right: var(--spacing-lg);
    flex: 1;
}

.setting-info h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--spacing-xs) 0;
}

.setting-info p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0;
}

/* Toggle Switch */
.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
    flex-shrink: 0;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-color);
    transition: 0.3s;
    border-radius: var(--radius-full);
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: 0.3s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--primary-color);
}

input:checked + .slider:before {
    transform: translateX(24px);
}

/* Danger Zone */
.danger-zone {
    background: rgba(239, 68, 68, 0.05);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.danger-zone-header {
    color: var(--danger-color);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.danger-zone-header svg {
    width: 20px;
    height: 20px;
}

.danger-zone-description {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
}

.btn-delete-account {
    width: 100%;
    padding: var(--spacing-md);
    background: transparent;
    color: var(--danger-color);
    border: 2px solid var(--danger-color);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-delete-account:hover {
    background: var(--danger-color);
    color: white;
    transform: translateY(-1px);
}

/* Settings Footer */
.settings-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    background: var(--bg-color);
}

.btn-logout {
    width: 100%;
    padding: 0.875rem 1.25rem;
    background: transparent;
    border: 2px solid var(--danger-color);
    border-radius: var(--radius-md);
    color: var(--danger-color);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
}

.btn-logout:hover {
    background: var(--danger-color);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.btn-logout:active {
    transform: translateY(0);
}

.btn-logout svg {
    flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   Pages Container
   -------------------------------------------------------------------------- */
.pages-container {
    flex: 1;
    position: relative;
    overflow: hidden;
    display: flex;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.page {
    min-width: 100%;
    height: 100%;
    overflow-y: auto;
    overflow-x: visible;  /* Changed from hidden to allow predictions panel to slide out */
    display: none;
    -webkit-overflow-scrolling: touch;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
}

.page.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

.page.slide-out-left {
    animation: slideOutLeft 0.3s ease forwards;
}

.page.slide-out-right {
    animation: slideOutRight 0.3s ease forwards;
}

.page.slide-in-left {
    animation: slideInLeft 0.3s ease forwards;
}

.page.slide-in-right {
    animation: slideInRight 0.3s ease forwards;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideOutLeft {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(-100%);
        opacity: 0;
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

@keyframes slideInLeft {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.page-content {
    padding: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
    padding-bottom: calc(var(--bottom-nav-height) + var(--spacing-lg));
}

.page-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 3rem;
    margin-bottom: 4rem;
    text-align: center;
}

/* --------------------------------------------------------------------------
   Toast Notifications
   -------------------------------------------------------------------------- */
.toast-container {
    position: fixed;
    top: calc(var(--header-height) + var(--spacing-md));
    right: var(--spacing-md);
    z-index: 3000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-width: 400px;
    width: calc(100% - 2 * var(--spacing-md));
}

.toast {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    border-left: 4px solid var(--primary-color);
    animation: toastSlideIn 0.3s ease-out;
    opacity: 0;
    transform: translateX(100%);
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

.toast.hiding {
    animation: toastSlideOut 0.3s ease-in forwards;
}

@keyframes toastSlideIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes toastSlideOut {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

.toast-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.toast-success {
    border-left-color: var(--success-color);
}

.toast-success .toast-icon {
    color: var(--success-color);
}

.toast-error {
    border-left-color: var(--danger-color);
}

.toast-error .toast-icon {
    color: var(--danger-color);
}

.toast-info {
    border-left-color: var(--primary-color);
}

.toast-info .toast-icon {
    color: var(--primary-color);
}

.toast-message {
    flex: 1;
    color: var(--text-primary);
    font-size: 0.95rem;
    line-height: 1.4;
}

/* --------------------------------------------------------------------------
   Custom Confirmation Dialog
   -------------------------------------------------------------------------- */
.confirm-dialog {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.confirm-dialog.hidden {
    display: none;
}

.confirm-dialog.active {
    opacity: 1;
}

.confirm-content {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    max-width: 400px;
    width: 90%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transform: scale(0.9);
    transition: transform 0.2s ease;
}

.confirm-dialog.active .confirm-content {
    transform: scale(1);
    animation: confirmSlideIn 0.3s ease-out;
}

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

.confirm-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    color: white;
}

.confirm-message {
    font-size: 1.1rem;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    line-height: 1.5;
}

.confirm-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

.btn-sm {
    padding: 0.625rem 1.5rem;
    font-size: 0.9rem;
    min-width: 100px;
}

/* --------------------------------------------------------------------------
   Bottom Navigation
   -------------------------------------------------------------------------- */
.bottom-nav {
    height: var(--bottom-nav-height);
    background: rgba(250, 250, 252, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid rgba(255, 255, 255, 0.5);
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.1);
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--spacing-md) var(--spacing-lg);
    gap: var(--spacing-md);
}

/* Dark mode glass morphism */
@media (prefers-color-scheme: dark) {
    .bottom-nav {
        background: rgba(40, 40, 45, 0.9);
        border-top: 1px solid rgba(255, 255, 255, 0.15);
    }
}

/* Sliding Indicator */
.nav-indicator {
    position: absolute;
    height: calc(100% - var(--spacing-sm));
    top: calc(var(--spacing-sm) / 2);
    border-radius: var(--radius-lg);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
    z-index: 0;
}

.nav-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    z-index: 1;
}

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

/* Tuner - Green/Teal */
.nav-btn[data-page="tuner-page"].active {
    color: #10b981;
}

.nav-btn[data-page="tuner-page"].active .nav-icon {
    filter: drop-shadow(0 2px 4px rgba(16, 185, 129, 0.3));
}

.bottom-nav[data-active="tuner-page"] .nav-indicator {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(20, 184, 166, 0.15));
}

/* Editor - Orange/Amber */
.nav-btn[data-page="editor-page"].active {
    color: #f97316;
}

.nav-btn[data-page="editor-page"].active .nav-icon {
    filter: drop-shadow(0 2px 4px rgba(249, 115, 22, 0.3));
}

.bottom-nav[data-active="editor-page"] .nav-indicator {
    background: linear-gradient(135deg, rgba(249, 115, 22, 0.15), rgba(245, 158, 11, 0.15));
}

/* Tabs Menu - Blue/Purple */
.nav-btn[data-page="menu-page"].active {
    color: #3b82f6;
}

.nav-btn[data-page="menu-page"].active .nav-icon {
    filter: drop-shadow(0 2px 4px rgba(59, 130, 246, 0.3));
}

.bottom-nav[data-active="menu-page"] .nav-indicator {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(139, 92, 246, 0.15));
}

.nav-icon {
    width: 32px;
    height: 32px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-btn.active .nav-icon {
    transform: translateY(-2px);
}

.nav-label {
    font-size: 0.875rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.nav-btn.active .nav-label {
    font-weight: 700;
}

/* --------------------------------------------------------------------------
   Common UI Elements
   -------------------------------------------------------------------------- */

/* Buttons */
.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    justify-content: center;
    text-decoration: none;
}

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

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-secondary {
    background: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background: #475569;
}

.btn-record {
    background: var(--danger-color);
    color: white;
}

.btn-record:hover {
    background: #dc2626;
}

.btn-record.recording {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

/* Input Fields */
.input-field {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 1.125rem;
    background: var(--surface-color);
    color: var(--text-primary);
    transition: all 0.2s ease;
    box-shadow: var(--shadow-md);
}

.input-field:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Checkbox */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

/* --------------------------------------------------------------------------
   PAGE 1: GUITAR TUNER
   -------------------------------------------------------------------------- */
.tuner-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.tuner-display {
    background: var(--surface-color);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
}

.current-note {
    font-weight: 700;
    color: var(--primary-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 240px;
}

.note-display {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: var(--spacing-md);
}

.note-letter {
    font-size: 6.5rem;
}

.note-octave {
    font-size: 3.5rem;
    color: var(--text-secondary);
}

.tuner-meter {
    height: 18px;
    background: linear-gradient(to right,
        var(--danger-color) 0%,
        var(--accent-color) 40%,
        var(--success-color) 50%,
        var(--accent-color) 60%,
        var(--danger-color) 100%);
    border-radius: var(--radius-full);
    position: relative;
    margin: var(--spacing-xl) 0;
}

.tuner-needle {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 38px;
    background: var(--text-primary);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-md);
    transition: left 0.3s ease;
}

.tuner-status {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--success-color);
    margin-top: var(--spacing-lg);
    transition: transform 0.15s ease, color 0.15s ease;
}

/* GuitarTuna-style celebration animation */
.tuner-celebration {
    animation: tuner-celebrate 0.6s ease-out;
}

@keyframes tuner-celebrate {
    0% { transform: scale(1); }
    25% { transform: scale(1.3); }
    50% { transform: scale(1.1); }
    75% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

/* Needle glow transition */
.tuner-needle {
    transition: left 0.1s ease, background-color 0.15s ease, box-shadow 0.15s ease;
}

/* String Selector - Redesigned for better UX */
.string-selector {
    margin-top: var(--spacing-xl);
    text-align: center;
    transition: all 0.3s ease;
    background: var(--bg-color);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 2px solid var(--border-color);
}

.string-selector.hidden {
    display: none;
}

.string-selector-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.string-buttons {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: var(--spacing-md);
    max-width: 600px;
    margin: 0 auto;
}

.string-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 85px;
    border: 3px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--surface-color);
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    gap: 6px;
    padding: var(--spacing-md);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
}

.string-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    opacity: 0;
    transition: opacity 0.25s ease;
    z-index: 0;
}

.string-btn:hover {
    border-color: var(--primary-color);
    transform: translateY(-3px) scale(1.03);
    box-shadow: 0 6px 16px rgba(245, 158, 11, 0.25);
}

.string-btn:active {
    transform: translateY(-1px) scale(1.01);
}

.string-btn.active {
    border-color: var(--primary-color);
    box-shadow: 0 6px 20px rgba(245, 158, 11, 0.35);
    transform: translateY(-2px);
}

.string-btn.active::before {
    opacity: 1;
}

.string-num {
    font-size: 0.75rem;
    font-weight: 700;
    opacity: 0.5;
    position: relative;
    z-index: 1;
    transition: all 0.25s ease;
}

.string-btn:hover .string-num {
    opacity: 0.8;
}

.string-btn.active .string-num {
    opacity: 1;
    color: white;
}

/* Hide string numbers when setting is disabled */
body.hide-string-numbers .string-num,
body.hide-string-numbers .string-number {
    display: none;
}

.string-note {
    font-size: 2rem;
    font-weight: 700;
    position: relative;
    z-index: 1;
    transition: all 0.25s ease;
}

.string-btn.active .string-note {
    color: white;
}

/* Detected String Display */
.detected-info {
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.detected-label {
    font-size: 1.375rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.detected-string {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    font-size: 2rem;
    font-weight: 600;
}

.string-number {
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.5rem;
}

.string-name {
    color: var(--text-primary);
}

/* Tuning Target Section */
.tuning-target-section {
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.target-label {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.target-hint {
    font-size: 1rem;
    color: var(--text-muted);
    font-style: italic;
}

/* Target Note Container with Pitch Adjustment */
.target-note-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.pitch-controls {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.pitch-adjust-btn {
    width: 48px;
    height: 48px;
    border: 2px solid var(--border-color);
    background: var(--surface-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

.pitch-adjust-btn:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: scale(1.05);
}

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

.pitch-adjust-btn svg {
    transition: transform 0.2s ease;
}

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

.frequency-display {
    font-size: 1.125rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-top: var(--spacing-sm);
}

/* Tuning Mode Toggle */
.tuning-mode-toggle {
    text-align: center;
    margin: var(--spacing-lg) 0;
}

.toggle-label {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-md);
    cursor: pointer;
    user-select: none;
    font-size: 0.9375rem;
    color: var(--text-secondary);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-color);
    border-radius: var(--radius-full);
    transition: all 0.2s ease;
}

.toggle-label:hover {
    background: var(--border-color);
}

.toggle-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

/* Duplicate styles removed - see String Selector section above */

.tuner-controls {
    text-align: center;
}

.tuner-controls .btn {
    min-width: 200px;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
}

/* --------------------------------------------------------------------------
   PAGE 2: TAB EDITOR
   -------------------------------------------------------------------------- */
.editor-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    position: relative;
}

.editor-toolbar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.input-title {
    font-size: 1.25rem;
    font-weight: 600;
    padding: var(--spacing-md) var(--spacing-lg);
}

.editor-workspace {
    position: relative;
    background: var(--surface-color);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.tab-textarea {
    width: 100%;
    min-height: 500px;
    padding: var(--spacing-xl);
    border: none;
    font-family: var(--font-mono);
    font-size: 1.125rem;
    line-height: 1.7;
    resize: vertical;
    background: var(--surface-color);
    color: var(--text-primary);
    white-space: pre;
    overflow-x: auto;
    overflow-y: auto;
    word-wrap: normal;
    word-break: normal;
}

.tab-textarea:focus {
    outline: none;
}

.editor-controls {
    display: flex;
    gap: var(--spacing-lg);
    align-items: stretch;
    position: relative;
    width: 100%;
}

.control-group-left {
    flex: 1 1 0;
    display: flex;
    align-items: stretch;
}

.control-group-center {
    flex: 2 1 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.control-group-right {
    flex: 1 1 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.save-timer-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    width: 100%;
    height: 100%;
    padding: var(--spacing-xl);
    background: var(--bg-color);
    border-radius: var(--radius-lg);
    border: 2px solid var(--border-color);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.save-timer-container:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.save-timer-container svg {
    color: var(--success-color);
    flex-shrink: 0;
    width: 24px;
    height: 24px;
}

.save-timer-container span {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
}

.control-group-right {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    justify-content: center;
    flex: 0 0 auto;
}

/* Large Record Button */
.btn-record-large {
    width: 100%;
    min-height: 100px;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, var(--danger-color) 0%, #dc2626 100%);
    border: none;
    border-radius: var(--radius-lg);
    color: white;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
    transition: all 0.2s ease;
}

.btn-record-large:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(239, 68, 68, 0.4);
}

.btn-record-large:active {
    transform: translateY(0);
}

.btn-record-large.recording {
    background: transparent;
    border: 3px solid var(--danger-color);
    animation: pulseRecording 1.5s ease-in-out infinite;
}

@keyframes pulseRecording {
    0%, 100% {
        border-color: var(--danger-color);
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7),
                    inset 0 0 20px rgba(239, 68, 68, 0.2);
    }
    50% {
        border-color: #ff0000;
        box-shadow: 0 0 0 8px rgba(239, 68, 68, 0),
                    inset 0 0 30px rgba(239, 68, 68, 0.4);
    }
}

@keyframes pulseButton {
    0%, 100% {
        box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
    }
    50% {
        box-shadow: 0 4px 20px rgba(239, 68, 68, 0.6);
    }
}

.record-icon-large {
    width: 24px;
    height: 24px;
    background: white;
    border-radius: var(--radius-full);
    display: inline-block;
}

.btn-record-large.recording .record-icon-large {
    background: var(--danger-color);
    animation: pulseIcon 1.5s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulseIcon {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.2);
        opacity: 0.8;
    }
}

.btn-record-large .record-text {
    font-size: 1rem;
    font-weight: 600;
}

.record-hint {
    font-size: 0.75rem;
    opacity: 0.9;
    font-weight: 400;
}

.control-group-right .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.625rem var(--spacing-lg);
    height: 100%;
    flex: 1;
    font-size: 0.9rem;
    font-weight: 600;
    white-space: nowrap;
}

.control-group-right .btn svg {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
}

.button-group-secondary {
    display: flex;
    gap: var(--spacing-xs);
    flex: 1;
}

.button-group-secondary .btn {
    flex: 1;
}

/* Predictions Side Panel */
.predictions-sidepanel {
    position: absolute;
    left: calc(100% + var(--spacing-xl));
    top: 0;
    width: 420px;
    height: 100%;
    min-height: 540px;
    background: var(--surface-color);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    z-index: 100;
    opacity: 1;
    transform: translateX(0);
    transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    will-change: transform, opacity;
    visibility: visible;
}

.predictions-sidepanel.hidden {
    opacity: 0;
    transform: translateX(-460px);  /* Full width (420px) + spacing (40px) to hide under editor */
    pointer-events: none;
    transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    display: flex !important;  /* Override global .hidden class to allow animation */
    visibility: hidden;  /* Hide from accessibility tree while invisible */
}

.predictions-sidepanel h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.predictions-scroll {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
    /* Removed max-height to use full panel space */
}

#predictions-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.predictions-header {
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.predictions-header h4 {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.prediction-item {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-color);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

.prediction-item.accepted {
    background: rgba(74, 222, 128, 0.1);
    border-left: 3px solid var(--success-color);
}

.prediction-item.rejected {
    background: rgba(248, 113, 113, 0.1);
    border-left: 3px solid var(--danger-color);
}

.prediction-item.corrected {
    background: rgba(59, 130, 246, 0.1);
    border-left: 3px solid var(--primary-color);
}

.prediction-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xs);
}

.note-number {
    font-weight: 600;
    color: var(--text-color);
}

.prediction-details {
    flex: 1;
    margin: 0 var(--spacing-sm);
    color: var(--text-color);
}

.pred-string, .pred-fret {
    font-weight: 600;
    color: var(--primary-color);
}

.prediction-confidence {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.prediction-actions {
    display: flex;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-xs);
}

.prediction-actions button {
    flex: 1;
    padding: 0.375rem 0.75rem;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.btn-edit {
    background: var(--bg-secondary);
    color: var(--text-color);
}

.btn-edit:hover {
    background: var(--primary-color);
    color: white;
}

.btn-accept {
    background: rgba(74, 222, 128, 0.2);
    color: var(--success-color);
}

.btn-accept:hover {
    background: var(--success-color);
    color: white;
}

.btn-reject {
    background: rgba(248, 113, 113, 0.2);
    color: var(--danger-color);
}

.btn-reject:hover {
    background: var(--danger-color);
    color: white;
}

.prediction-editor {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.correction-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.string-buttons {
    display: flex;
    gap: 4px;
}

.fret-buttons {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.string-btn {
    flex: 1;
    min-width: 0;
    height: 32px;
}

.fret-btn {
    min-width: 36px;
    height: 32px;
}

.string-btn, .fret-btn {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-color);
    color: var(--text-color);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.string-btn:hover, .fret-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.string-btn.selected, .fret-btn.selected {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.correction-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xs);
}

.btn-save, .btn-cancel {
    padding: 0.375rem 0.75rem;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.btn-save {
    background: var(--success-color);
    color: white;
}

.btn-save:hover {
    background: #22c55e;
}

.btn-cancel {
    background: var(--bg-color);
    color: var(--text-secondary);
}

.btn-cancel:hover {
    background: var(--danger-color);
    color: white;
}

/* Delete button for predictions */
.btn-delete {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-speed);
    font-size: 0.875rem;
}

.btn-delete:hover {
    background: var(--danger-color);
    color: white;
    border-color: var(--danger-color);
}

/* Insert note section */
.insert-note-section {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px dashed var(--border-color);
}

.btn-insert-note {
    width: 100%;
    padding: 0.75rem;
    background: transparent;
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.btn-insert-note:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(245, 158, 11, 0.1);
}

.insert-note-editor {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-color);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.position-buttons {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.position-btn {
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--surface-color);
    color: var(--text-color);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.position-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.position-btn.selected {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* --------------------------------------------------------------------------
   PAGE 3: TAB MENU
   -------------------------------------------------------------------------- */
.create-tab-container {
    display: flex;
    justify-content: center;
    margin-bottom: 3rem;
}

.btn-create-tab {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: 1.5rem 3rem;
    font-size: 1.5rem;
    font-weight: 600;
}

.btn-create-tab svg {
    width: 28px;
    height: 28px;
}

.tabs-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding-bottom: calc(var(--bottom-nav-height) + var(--spacing-xl));
}

.tab-item {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
}

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

.tab-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.tab-item-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.tab-item-info h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--spacing-xs) 0;
    line-height: 1.2;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.tab-item-info p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.4;
    margin-right: var(--spacing-md);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.tab-item-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    align-self: center;
    flex-shrink: 0;
    margin-top: 4px;
}

.tab-item-actions .btn {
    padding: var(--spacing-md);
    font-size: 0.875rem;
    min-width: auto;
}

.btn-icon {
    width: 52px;
    height: 52px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
}

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

.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-muted);
}

.empty-state p {
    font-size: 1rem;
}

/* --------------------------------------------------------------------------
   Responsive Design
   -------------------------------------------------------------------------- */

/* Tablets and Desktop */
@media (min-width: 768px) {
    .page-content {
        padding: var(--spacing-xl) var(--spacing-2xl);
        max-width: 1400px;
    }

    .page-title {
        font-size: 2.5rem;
        margin-bottom: 4rem;
    }

    .editor-controls {
        flex-direction: row;
        align-items: stretch;
        gap: var(--spacing-xl);
    }

    .control-group-left {
        min-width: 450px;
    }

    .control-group-right {
        flex-direction: column;
        gap: var(--spacing-sm);
        min-width: 450px;
    }

    .control-group-right .btn {
        width: 100%;
        min-width: 140px;
    }

    /* String selector tablet layout - 6 buttons in a row */
    .string-buttons {
        grid-template-columns: repeat(6, 1fr);
        gap: var(--spacing-md);
    }

    .string-btn {
        min-height: 80px;
    }

    /* Desktop: increase spacing in containers */
    .tuner-container,
    .editor-container {
        padding: var(--spacing-2xl);
    }

    .tabs-list {
        gap: var(--spacing-xl);
    }
}

/* Mobile specific adjustments */
@media (max-width: 767px) {
    :root {
        --header-height: 60px;
        --bottom-nav-height: 70px;
    }

    /* Header adjustments */
    .app-header {
        height: var(--header-height);
        padding: 0 var(--spacing-md);
    }

    .app-logo {
        font-size: 1.75rem;
    }

    .settings-btn,
    .icon-btn {
        width: 44px;
        height: 44px;
    }

    .settings-btn svg,
    .icon-btn svg {
        width: 22px;
        height: 22px;
    }

    /* Bottom nav adjustments */
    .bottom-nav {
        height: 70px;
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    .nav-btn {
        min-width: 65px;
        padding: var(--spacing-xs);
    }

    .nav-icon {
        width: 26px;
        height: 26px;
    }

    .nav-label {
        font-size: 0.7rem;
    }

    /* Page content adjustments */
    .page-content {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .page-title {
        font-size: 1.5rem;
        margin-bottom: 3rem;
    }

    /* Tuner mobile optimizations */

    .note-letter {
        font-size: 5rem;
    }

    .note-octave {
        font-size: 2.5rem;
    }

    .frequency-display {
        font-size: 1rem;
    }

    .tuner-meter {
        height: 20px;
        margin: var(--spacing-lg) 0;
    }

    .tuner-needle {
        width: 6px;
        height: 40px;
    }

    .tuner-status {
        font-size: 1.25rem;
        margin-top: var(--spacing-md);
    }

    .pitch-adjust-btn {
        width: 50px;
        height: 50px;
        min-width: 50px;
    }

    .pitch-adjust-btn svg {
        width: 22px;
        height: 22px;
    }

    /* String selector mobile adjustments */
    .string-selector {
        padding: var(--spacing-md);
    }

    .string-buttons {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-sm);
    }

    .string-btn {
        min-height: 70px;
        padding: var(--spacing-sm);
    }

    .string-note {
        font-size: 1.5rem;
    }

    .string-num {
        font-size: 0.7rem;
    }

    .detected-label,
    .string-selector-label {
        font-size: 1.125rem;
    }

    .detected-string {
        font-size: 1.5rem;
    }

    .string-number {
        width: 45px;
        height: 45px;
        font-size: 1.25rem;
    }

    /* Start tuner button - make it larger for easy tapping */
    #start-tuner {
        min-height: 56px;
        font-size: 1.125rem;
        padding: var(--spacing-md) var(--spacing-xl);
    }

    /* Editor mobile optimizations */
    .editor-controls {
        flex-direction: column;
        align-items: stretch;
        padding-bottom: calc(var(--bottom-nav-height) + var(--spacing-md));
    }

    .control-group-left {
        width: 100%;
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .control-group-center {
        width: 100%;
        padding: var(--spacing-md) 0;
    }

    /* Predictions side panel on mobile */
    .predictions-sidepanel {
        position: fixed;
        right: 0;
        top: 60px;
        bottom: var(--bottom-nav-height);
        width: 90%;
        max-width: 350px;
        max-height: none;
        border-radius: 0;
    }

    .predictions-sidepanel.hidden {
        transform: translateX(100%);
    }

    .save-timer-container {
        width: 100%;
        min-height: 60px;
        padding: var(--spacing-md);
    }

    .save-timer-container span {
        font-size: 0.9375rem;
    }

    .save-timer-container svg {
        width: 20px;
        height: 20px;
    }

    .btn-record-large {
        max-width: 100%;
        min-height: 56px;
        font-size: 0.9rem;
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .btn-record-large .record-hint {
        font-size: 0.7rem;
    }

    .btn-record-large .record-icon-large {
        width: 12px;
        height: 12px;
    }

    .control-group-right {
        width: 100%;
        flex-direction: row;
        flex-wrap: wrap;
        gap: var(--spacing-xs);
        min-height: auto;
    }

    .control-group-right .btn {
        flex: 1;
        min-width: 75px;
        min-height: 42px;
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.8rem;
    }

    .control-group-right .btn svg {
        width: 15px;
        height: 15px;
    }

    .control-group-right .btn-primary {
        flex: 1 1 100%;
        min-height: 48px;
    }

    /* Editor container - add extra padding at bottom for scrolling */
    .editor-container {
        padding-bottom: calc(var(--bottom-nav-height) + var(--spacing-2xl));
    }

    /* Text areas and inputs */
    .tab-textarea {
        min-height: 400px;
        font-size: 1rem;
        padding: var(--spacing-md);
    }

    .input-field {
        font-size: 1rem;
        padding: var(--spacing-md);
        min-height: 48px;
    }

    /* Tabs list - more compact on mobile */
    .tabs-list {
        gap: var(--spacing-sm);
    }

    .tab-item {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .tab-item-header {
        margin-bottom: var(--spacing-xs);
    }

    .tab-item h3 {
        font-size: 1.125rem;
        margin-bottom: 0.25rem;
    }

    .tab-item p {
        font-size: 0.875rem;
    }

    .tab-item-actions {
        gap: var(--spacing-xs);
    }

    .btn-icon {
        width: 40px;
        height: 40px;
        min-width: 40px;
    }

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

    /* Settings modal */
    .settings-content {
        width: 95%;
        max-width: 500px;
        margin: var(--spacing-md);
    }

    .setting-item {
        padding: var(--spacing-md) var(--spacing-lg);
    }

    .setting-info {
        margin-right: var(--spacing-xl);
    }

    .setting-item h3 {
        font-size: 1.125rem;
    }

    .setting-item p {
        font-size: 0.9375rem;
    }
}

/* Desktop */
@media (min-width: 1024px) {
    .app-header h1 {
        font-size: 1.75rem;
    }

    .tab-textarea {
        min-height: 500px;
        font-size: 1rem;
    }

    /* String selector desktop - already set to 6 columns by default */
}

/* --------------------------------------------------------------------------
   Utility Classes
   -------------------------------------------------------------------------- */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

/* --------------------------------------------------------------------------
   Animations
   -------------------------------------------------------------------------- */
@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideInLeft {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.page.slide-in-right {
    animation: slideInRight 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.page.slide-in-left {
    animation: slideInLeft 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --------------------------------------------------------------------------
   Tutorial System
   -------------------------------------------------------------------------- */
/* Block all page interactions when tutorial is active */
body.tutorial-active * {
    pointer-events: none !important;
}

/* Allow only tutorial elements to be interactive */
body.tutorial-active .tutorial-overlay,
body.tutorial-active .tutorial-tooltip,
body.tutorial-active .tutorial-tooltip * {
    pointer-events: auto !important;
}

.tutorial-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 9998;
    transition: clip-path 0.3s ease, opacity 0.3s ease;
    opacity: 1;
    pointer-events: auto;
    /* Will be dynamically updated with clip-path to create hole for highlighted element */
}

.tutorial-highlight {
    position: relative !important;
    z-index: 9999 !important;
    /* Element is highlighted visually but NOT interactive */
}

.tutorial-tooltip {
    position: fixed;
    z-index: 10000;
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 400px;
    width: 90%;
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.tutorial-tooltip::before {
    content: '';
    position: absolute;
    width: 0;
    height: 0;
    border-style: solid;
}

.tutorial-tooltip.position-top::before {
    bottom: -10px;
    left: var(--arrow-left, 50%);
    transform: translateX(-50%);
    border-width: 10px 10px 0 10px;
    border-color: var(--bg-card, var(--surface-color)) transparent transparent transparent;
}

.tutorial-tooltip.position-bottom::before {
    top: -10px;
    left: var(--arrow-left, 50%);
    transform: translateX(-50%);
    border-width: 0 10px 10px 10px;
    border-color: transparent transparent var(--bg-card, var(--surface-color)) transparent;
}

.tutorial-tooltip.position-left::before {
    right: -10px;
    top: var(--arrow-top, 50%);
    transform: translateY(-50%);
    border-width: 10px 0 10px 10px;
    border-color: transparent transparent transparent var(--bg-card, var(--surface-color));
}

.tutorial-tooltip.position-right::before {
    left: -10px;
    top: var(--arrow-top, 50%);
    transform: translateY(-50%);
    border-width: 10px 10px 10px 0;
    border-color: transparent var(--bg-card, var(--surface-color)) transparent transparent;
}

.tutorial-tooltip-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.tutorial-tooltip-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.tutorial-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.tutorial-close:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.tutorial-tooltip-content {
    padding: var(--spacing-lg);
    color: var(--text-secondary);
    line-height: 1.6;
}

.tutorial-tooltip-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.tutorial-progress {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.tutorial-buttons {
    display: flex;
    gap: var(--spacing-sm);
}

.tutorial-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    border: none;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.tutorial-skip {
    background: transparent;
    color: var(--text-secondary);
}

.tutorial-skip:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.tutorial-prev {
    background: var(--border-color);
    color: var(--text-primary);
}

.tutorial-prev:hover {
    background: var(--secondary-color);
    color: white;
}

.tutorial-next {
    background: var(--primary-color);
    color: white;
}

.tutorial-next:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

/* =============================================================================
   CONSENT MODAL
   ============================================================================= */

.consent-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.consent-modal:not(.hidden) {
    opacity: 1;
    pointer-events: all;
}

.consent-content {
    background: var(--bg-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.consent-modal:not(.hidden) .consent-content {
    transform: scale(1);
}

.consent-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.consent-header h2 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.consent-body {
    padding: var(--spacing-lg);
}

.consent-body > p {
    margin: 0 0 var(--spacing-md) 0;
    color: var(--text-secondary);
    line-height: 1.6;
}

.consent-details {
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.consent-details h3 {
    margin: 0 0 var(--spacing-sm) 0;
    font-size: 1rem;
    color: var(--text-primary);
}

.consent-details h3:not(:first-child) {
    margin-top: var(--spacing-md);
}

.consent-details ul {
    margin: 0;
    padding-left: var(--spacing-lg);
    color: var(--text-secondary);
}

.consent-details li {
    margin: var(--spacing-xs) 0;
    line-height: 1.5;
}

.consent-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.consent-checkbox {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: background 0.2s ease;
}

.consent-checkbox:hover {
    background: var(--bg-secondary);
}

.consent-checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.consent-checkbox span {
    color: var(--text-primary);
    font-size: 0.9375rem;
}

.consent-buttons {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

.consent-buttons .btn {
    padding: var(--spacing-sm) var(--spacing-lg);
}