/* ============================================
   CSS Variables and Root
   ============================================ */
:root {
    --bg-primary: #121212;
    --bg-secondary: #1e1e1e;
    --bg-tertiary: #2a2a2a;
    --text-primary: #e0e0e0;
    --text-secondary: #b0b0b0;
    --accent: #bb86fc;
    --accent-light: #d4b4ff;
    --accent-dark: #9a5fcc;
    --success: #4caf50;
    --danger: #f44336;
    --warning: #ff9800;
    --border: #404040;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    --transition: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--accent-light);
}

button {
    cursor: pointer;
    transition: all var(--transition);
    border: none;
    font-family: inherit;
}

input, textarea, select {
    font-family: inherit;
    color: var(--text-primary);
}

/* ============================================
   Layout
   ============================================ */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.app-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    color: var(--accent);
    flex-shrink: 0;
}
.logo-link{
	display: contents;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.nav-desktop {
    display: flex;
    gap: 2rem;
    flex: 1;
}

.nav-link {
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background var(--transition);
}

.nav-link:hover {
    background: var(--bg-tertiary);
}

.nav-link.active {
    background: var(--accent);
    color: white;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nickname-badge {
    background: var(--accent);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.9rem;
    white-space: nowrap;
}

.btn-small {
    background: transparent;
    color: var(--text-primary);
    padding: 0.5rem;
    border-radius: 4px;
}

.btn-small:hover {
    background: var(--bg-tertiary);
}

.menu-toggle {
    display: none;
    background: transparent;
    color: var(--accent);
    font-size: 1.5rem;
    padding: 0.5rem;
}

.nav-mobile {
    display: none;
    flex-direction: column;
    padding: 1rem;
    border-top: 1px solid var(--border);
    gap: 0.5rem;
}

.nav-mobile.active {
    display: flex;
}

.nav-mobile .nav-link {
    display: block;
    padding: 0.75rem;
}

.main-content {
    flex: 1;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    padding: 2rem;
}

/* ============================================
   Forms and Inputs
   ============================================ */
.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.form-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(187, 134, 252, 0.1);
}

textarea.form-input {
    resize: vertical;
    min-height: 200px;
    font-family: 'Monaco', 'Courier New', monospace;
}

select.form-input {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23bb86fc' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0.5rem 0;
}

.form-checkbox input {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--accent);
}

.form-checkbox label {
    cursor: pointer;
    margin: 0;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 500;
    transition: all var(--transition);
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(187, 134, 252, 0.3);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--border);
}

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

.btn-danger:hover {
    background: #e53935;
}

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

.btn-block {
    width: 100%;
    justify-content: center;
}

/* ============================================
   Modals
   ============================================ */
.modal {
    display: flex;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(2px);
}

.modal[hidden] {
    display: none;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 2rem;
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow);
}

.modal-content h2 {
    margin-bottom: 1.5rem;
    color: var(--accent);
}

.modal-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.modal-buttons .btn {
    flex: 1;
}

/* ============================================
   Home Page - Search and Filter
   ============================================ */
.search-container {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    margin-bottom: 2rem;
}

.search-box {
    margin-bottom: 1.5rem;
    position: relative;
}

.search-box .form-input {
    padding-left: 2.5rem;
}

.search-box i {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.filters {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.filter-group label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.tag-checkboxes {
    max-height: 200px;
    overflow-y: auto;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.5rem;
    background: var(--bg-primary);
}

.tag-checkboxes .form-checkbox {
    padding: 0.25rem;
    margin: 0;
}

/* ============================================
   Songs Grid
   ============================================ */
.songs-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.song-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.song-card:hover {
    border-color: var(--accent);
    box-shadow: 0 8px 16px rgba(187, 134, 252, 0.2);
    transform: translateY(-4px);
}

.song-card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent);
}

.song-card-artist {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.song-card-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    flex-wrap: wrap;
}

.song-card-meta span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.song-card-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tag-badge {
    background: var(--bg-tertiary);
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: all var(--transition);
}

.tag-badge:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.song-card-preview {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
    line-height: 1.4;
}

.song-card-action {
    margin-top: auto;
}

.song-card-action .btn {
    width: 100%;
    justify-content: center;
}

/* ============================================
   Pagination
   ============================================ */
.pagination {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 2rem 0;
}

.pagination .btn {
    min-width: 120px;
}

.pagination .btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination-info {
    text-align: center;
    color: var(--text-secondary);
    margin: 1rem 0;
}

/* ============================================
   Song View Page
   ============================================ */
.song-view {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.song-info {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
}

.song-info h2 {
    color: var(--accent);
    margin-bottom: 1rem;
}

.song-meta-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin: 1rem 0;
}

.song-meta-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.song-meta-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-weight: 500;
}

.song-meta-value {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 600;
}

.song-tags-list {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin: 1rem 0;
}

.youtube-player {
    width: 100%;
    aspect-ratio: 16 / 9;
    border: 1px solid var(--border);
    border-radius: 4px;
    overflow: hidden;
    margin: 1rem 0;
}

.youtube-player iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.song-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.song-actions .btn {
    flex: 1;
    min-width: 120px;
    justify-content: center;
}

.transpose-control {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

.transpose-slider {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.transpose-slider input[type="range"] {
    flex: 1;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
}

.transpose-slider input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
}

.transpose-slider input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

.transpose-value {
    min-width: 80px;
    text-align: center;
    font-weight: 600;
    color: var(--accent);
}

.song-text {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    line-height: 1.8;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.95rem;
    overflow-x: auto;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.chord {
    background: var(--bg-tertiary);
    color: var(--accent);
    padding: 0.1rem 0.4rem;
    border-radius: 3px;
    font-weight: 600;
}

.section-header {
    background: var(--accent);
    color: white;
    padding: 0.75rem 1rem;
    margin: 1rem 0 0.5rem 0;
    border-radius: 4px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.95rem;
}

/* ============================================
   Edit Song Page
   ============================================ */
.edit-form {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.edit-form h2 {
    color: var(--accent);
    margin-bottom: 1.5rem;
}

.edit-form .form-row {
    grid-template-columns: 1fr 1fr;
}

.edit-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.edit-actions .btn {
    flex: 1;
}

.delete-section {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.delete-section .btn-danger {
    width: 100%;
}

/* ============================================
   Playlists Page
   ============================================ */
.playlists-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.playlist-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.playlist-card:hover {
    border-color: var(--accent);
    box-shadow: 0 8px 16px rgba(187, 134, 252, 0.2);
    transform: translateY(-4px);
}

.playlist-card-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--accent);
}

.playlist-card-info {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.playlist-card-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: auto;
}

.playlist-card-actions .btn {
    flex: 1;
}

/* ============================================
   Playlist View Page
   ============================================ */
.playlist-view {
    max-width: 1200px;
    margin: 0 auto;
}

.playlist-header {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2rem;
}

.playlist-header h2 {
    color: var(--accent);
    margin-bottom: 1rem;
}

.playlist-header-info {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    margin: 1rem 0;
    font-size: 0.95rem;
}

.playlist-header-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.playlist-songs-table {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    overflow-x: auto;
}

.playlist-songs-table table {
    width: 100%;
    border-collapse: collapse;
}

.playlist-songs-table th {
    background: var(--bg-tertiary);
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
}

.playlist-songs-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
}

.playlist-songs-table tr:hover {
    background: var(--bg-tertiary);
}

.playlist-songs-table tr:last-child td {
    border-bottom: none;
}

.playlist-songs-table .song-link {
    color: var(--accent);
    cursor: pointer;
    font-weight: 500;
}

.playlist-songs-table .song-link:hover {
    text-decoration: underline;
}

.playlist-select-container {
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--bg-primary);
    margin-bottom: 1rem;
}

.playlist-option {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: background var(--transition);
}

.playlist-option:last-child {
    border-bottom: none;
}

.playlist-option:hover {
    background: var(--bg-secondary);
}

.playlist-option input[type="radio"] {
    margin-right: 0.5rem;
}

/* ============================================
   Import Page
   ============================================ */
.import-container {
    max-width: 800px;
    margin: 0 auto;
}

.drop-zone {
    border: 2px dashed var(--border);
    border-radius: 8px;
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
    background: var(--bg-secondary);
}

.drop-zone:hover {
    border-color: var(--accent);
    background: var(--bg-tertiary);
}

.drop-zone.active {
    border-color: var(--accent);
    background: rgba(187, 134, 252, 0.1);
}

.drop-zone i {
    font-size: 3rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

.import-progress {
    margin-top: 2rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
    margin: 1rem 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    transition: width var(--transition);
}

.import-results {
    margin-top: 2rem;
}

.import-results h3 {
    color: var(--accent);
    margin-bottom: 1rem;
}

.import-results-list {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    max-height: 400px;
    overflow-y: auto;
}

.import-result-item {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.import-result-item:last-child {
    border-bottom: none;
}

.import-result-item.success i {
    color: var(--success);
}

.import-result-item.error i {
    color: var(--danger);
}

/* ============================================
   Toast Notifications
   ============================================ */
.toast-container {
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    pointer-events: none;
}

.toast {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1rem 1.5rem;
    min-width: 300px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 1rem;
    animation: slideIn 0.3s ease;
    pointer-events: auto;
}

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

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

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

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

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

.toast.warning i {
    color: var(--warning);
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(400px);
        opacity: 0;
    }
}

.toast.removing {
    animation: slideOut 0.3s ease forwards;
}

/* ============================================
   Loading and Empty States
   ============================================ */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 3rem;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 3rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state p {
    margin: 1rem 0;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .header-content {
        padding: 1rem;
        gap: 1rem;
    }

    .nav-desktop {
        display: none;
    }

    .menu-toggle {
        display: block;
    }

    .logo h1 {
        font-size: 1.2rem;
    }

    .main-content {
        padding: 1rem;
    }

    .songs-container {
        grid-template-columns: 1fr;
    }

    .song-view {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

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

    .playlists-container {
        grid-template-columns: 1fr;
    }

    .song-meta-info {
        grid-template-columns: 1fr;
    }

    .modal-content {
        width: 95%;
    }

    .toast {
        min-width: 90%;
        max-width: calc(100vw - 2rem);
    }

    .drop-zone {
        padding: 2rem 1rem;
    }

    .playlist-songs-table {
        font-size: 0.9rem;
    }

    .playlist-songs-table th,
    .playlist-songs-table td {
        padding: 0.75rem;
    }

    .edit-actions,
    .song-actions {
        flex-direction: column;
    }

    .edit-actions .btn,
    .song-actions .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .header-content {
        padding: 0.75rem;
    }

    .logo h1 {
        display: none;
    }

    .user-info {
        gap: 0.5rem;
    }

    .main-content {
        padding: 0.75rem;
    }

    .search-container,
    .song-info,
    .edit-form,
    .playlist-header {
        padding: 1rem;
    }

    .filters {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .song-meta-info {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .transpose-slider {
        flex-direction: column;
    }

    .transpose-value {
        width: 100%;
    }

    .modal-buttons {
        flex-direction: column;
    }

    .modal-buttons .btn {
        flex: 1;
    }

    .toast {
        min-width: calc(100vw - 1.5rem);
    }

    .drop-zone {
        padding: 1.5rem 0.75rem;
    }

    .drop-zone i {
        font-size: 2rem;
    }
}