:root {
    --bg-color: #ffffff;
    --text-color: #000000;
    --accent-color: #2196F3;
    --border-color: #e0e0e0;
    --card-bg: #f5f5f5;
    --shadow: rgba(0, 0, 0, 0.1);
    --font-size: 18px;
}

[data-theme="light"] {
    --bg-color: #ffffff;
}

[data-theme="light"] html {
    background-color: #ffffff;
}

[data-theme="dark"] {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --accent-color: #64B5F6;
    --border-color: #333333;
    --card-bg: #1e1e1e;
    --shadow: rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] html {
    background-color: #121212;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    background-color: var(--bg-color);
    transition: background-color 0.1s;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.1s, color 0.1s;
    font-size: var(--font-size);
    min-height: 100vh;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px;
}

.main-layout {
    position: relative;
    width: 100%;
}

.menu-toggle {
    display: inline-flex !important;
    align-items: center;
    gap: 6px;
    z-index: 1001 !important;
    position: relative;
    cursor: pointer !important;
    pointer-events: auto !important;
}

.menu-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(2px);
    display: none;
    z-index: 900;
}

.menu-backdrop.show {
    display: block;
}

.side-menu {
    background: var(--card-bg);
    border-radius: 0 15px 15px 0;
    padding: 80px 20px 20px;
    box-shadow: 0 2px 10px var(--shadow);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 270px;
    transform: translateX(-110%);
    transition: transform 0.3s ease;
    z-index: 1000;
    overflow-y: auto;
}

.side-menu.open {
    transform: translateX(0);
}

body.menu-open {
    overflow: hidden;
}

.side-menu h2 {
    margin-bottom: 15px;
    color: var(--accent-color);
}

.side-nav {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.side-nav a {
    text-decoration: none;
    padding: 10px 12px;
    border-radius: 8px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    transition: all 0.2s;
}

.side-nav a:hover {
    background: var(--accent-color);
    color: #fff;
}

.contacts-card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 15px;
}

.contacts-card h3 {
    margin-bottom: 10px;
    color: var(--accent-color);
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 10px;
}

.contact-links a,
.contacts-card a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
}

.contact-links a:hover,
.contacts-card a:hover {
    text-decoration: underline;
}

.content-area {
    width: 100%;
    margin: 0 auto;
}

.menu-controls {
    margin-top: 20px;
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.menu-controls .font-controls {
    display: flex;
    gap: 10px;
}

.menu-actions {
    margin-top: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

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

.update-status {
    font-size: 0.85em;
    color: var(--text-color);
    min-height: 1.2em;
    opacity: 0.8;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

header h1 {
    font-size: 1.5rem;
    color: var(--accent-color);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 15px;
}

.controls {
    display: flex;
    gap: 10px;
}

.icon-btn {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 8px 12px;
    cursor: pointer !important;
    font-size: 16px;
    color: var(--text-color);
    transition: all 0.2s;
    pointer-events: auto !important;
    touch-action: manipulation;
}

.icon-btn:hover {
    background: var(--accent-color);
    color: white;
    transform: scale(1.05);
}

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

.theme-icon {
    font-size: 20px;
}

.search-container {
    position: relative;
    margin-bottom: 20px;
}

#searchInput {
    width: 100%;
    padding: 12px 15px;
    font-size: 16px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    background: var(--card-bg);
    color: var(--text-color);
    transition: all 0.3s;
}

#searchInput:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.search-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    margin-top: 5px;
    max-height: 300px;
    overflow-y: auto;
    z-index: 100;
    display: none;
    box-shadow: 0 4px 6px var(--shadow);
}

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

.search-result-item {
    padding: 12px 15px;
    cursor: pointer;
    border-bottom: 1px solid var(--border-color);
    transition: background 0.2s;
}

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

.search-result-item:hover {
    background: var(--accent-color);
    color: white;
}

.song-container {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 2px 10px var(--shadow);
}

.song-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.tonality-info {
    display: none !important;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    justify-content: center;
}

.tonality-info.hidden {
    display: none !important;
    visibility: hidden !important;
    height: 0 !important;
    width: 0 !important;
    overflow: hidden !important;
    margin: 0 !important;
    padding: 0 !important;
    opacity: 0 !important;
}

.tonality-info:not(.hidden) {
    display: flex !important;
    visibility: visible !important;
    opacity: 1 !important;
}

.tonality-label {
    font-weight: 500;
    color: var(--text-color);
    font-size: 0.95em;
}

.tonality-controls {
    display: flex;
    align-items: center;
    gap: 12px;
    justify-content: center;
    flex-wrap: nowrap;
}

.transpose-btn.small {
    padding: 6px 10px;
    font-size: 14px;
    min-width: 32px;
    flex-shrink: 0;
}

.transpose-btn {
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 10px 20px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
    min-width: 50px;
}

.transpose-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow);
}

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

.transpose-btn.reset {
    background: var(--border-color);
    color: var(--text-color);
    font-size: 14px;
    padding: 8px 15px;
}

.transpose-label {
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: 2px;
}

.current-key {
    font-weight: 600;
    color: var(--accent-color);
    font-size: 1.05em;
    white-space: nowrap;
}

#songTitle {
    font-size: 1.8em;
    margin-bottom: 25px;
    color: var(--accent-color);
}

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

.song-text {
    white-space: pre-line;
    text-align: left;
    font-size: 1em;
    display: flex;
    flex-direction: column;
    gap: 0;
    line-height: 1.3;
}

.song-section-title {
    margin: 1.8em 0 0.5em;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 700;
    color: var(--accent-color);
    text-align: left;
}

.song-id {
    margin-top: 25px;
    text-align: right;
    font-size: 0.9em;
    color: var(--accent-color);
    font-weight: 500;
}

.site-footer {
    text-align: center;
    padding: 25px 15px;
    color: var(--text-color);
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
    margin-top: 40px;
}

.site-footer a {
    color: inherit;
}

.song-text .chord {
    color: var(--accent-color);
    font-weight: bold;
    font-size: 0.9em;
    vertical-align: super;
    margin: 0 2px;
}

/* Аккорды над строками */
.song-line {
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.08em;
}

.song-text .chord-line {
    color: var(--accent-color);
    font-weight: bold;
    font-size: 0.9em;
    margin-bottom: 0.05em;
    margin-top: 0;
    min-height: auto;
    line-height: 1.1;
    transition: opacity 0.3s;
}

.song-text .chord-line.hidden {
    display: none;
}

.song-text .chord-item {
    margin-right: 0.4em;
    display: inline-block;
    white-space: nowrap;
}

.song-text .chord-item:last-child {
    margin-right: 0;
}

.song-text .text-line {
    line-height: 1.3;
    margin: 0;
    padding: 0;
    min-height: auto;
}

.song-line.empty {
    height: 0;
    margin-bottom: 0.2em;
}

.song-line {
    margin-bottom: 0;
    min-height: 0;
}

.chords-toggle {
    background: var(--accent-color);
    color: white;
}

/* Адаптивность для мобильных устройств */
@media (max-width: 600px) {
    .container {
        padding: 10px;
    }

    header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }

    header h1 {
        font-size: 1.2rem;
    }

    .header-left {
        width: 100%;
        justify-content: space-between;
    }

    .controls {
        display: none !important;
    }

    .song-controls {
        gap: 10px;
    }

    .transpose-btn {
        padding: 8px 15px;
        font-size: 14px;
    }

    #songTitle {
        font-size: 1.4em;
    }

    .song-link {
        padding: 2px 4px !important;
        font-size: 0.9em !important;
        min-height: auto !important;
        line-height: 1.3 !important;
    }

    .song-item {
        margin-bottom: 3px !important;
        padding-bottom: 3px !important;
    }

    .song-number {
        margin-right: 8px !important;
        min-width: 25px !important;
        font-size: 0.9em !important;
    }

    .tonality-info.hidden {
        display: none !important;
        visibility: hidden !important;
        height: 0 !important;
        width: 0 !important;
        overflow: hidden !important;
        margin: 0 !important;
        padding: 0 !important;
        opacity: 0 !important;
    }

    .menu-toggle {
        z-index: 1001 !important;
        cursor: pointer !important;
        pointer-events: auto !important;
    }
}

@media (min-width: 1024px) {
    .main-layout {
        display: flex;
        gap: 25px;
        align-items: flex-start;
    }

    .side-menu {
        position: sticky;
        top: 20px;
        border-radius: 15px;
        transform: none;
        width: 260px;
        padding: 20px;
        height: max-content;
    }

    #menuToggle {
        display: none;
    }

    .menu-backdrop {
        display: none !important;
    }

    body.menu-open {
        overflow: auto;
    }

    .content-area {
        flex: 1;
    }
    
    .song-container {
        width: 100%;
    }
}

/* Стили для установки PWA */
.install-prompt {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-color);
    color: white;
    padding: 15px 20px;
    border-radius: 10px;
    box-shadow: 0 4px 12px var(--shadow);
    display: none;
    z-index: 1000;
    max-width: 90%;
}

.install-prompt.show {
    display: block;
}

.install-prompt button {
    background: white;
    color: var(--accent-color);
    border: none;
    padding: 8px 15px;
    border-radius: 5px;
    margin-left: 10px;
    cursor: pointer;
    font-weight: bold;
}

/* Список песен */
.songs-list {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 2px 10px var(--shadow);
}

.songs-list h2 {
    margin-bottom: 20px;
    color: var(--accent-color);
    font-size: 1.5rem;
}

.songs-list-items {
    list-style: none;
    padding: 0;
}

.song-item {
    margin-bottom: 3px !important;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 3px !important;
}

.song-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.song-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-color);
    padding: 2px 4px !important;
    border-radius: 3px;
    transition: all 0.2s;
    font-size: 0.9em !important;
    min-height: auto !important;
    line-height: 1.3 !important;
}

.song-link:hover {
    background: var(--accent-color);
    color: white;
    transform: translateX(5px);
}

.song-number {
    font-weight: bold;
    margin-right: 8px !important;
    min-width: 25px !important;
    color: var(--accent-color);
    font-size: 0.9em !important;
}

.song-link:hover .song-number {
    color: white;
}

.song-title {
    flex: 1;
}

.home-link {
    text-decoration: none;
    color: var(--accent-color);
    transition: all 0.2s;
}

.home-link:hover {
    opacity: 0.8;
}

.empty-message {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-color);
    opacity: 0.7;
}

/* Админ-панель */
.login-container {
    max-width: 400px;
    margin: 100px auto;
    background: var(--card-bg);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 4px 12px var(--shadow);
}

.login-container h1 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--accent-color);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-color);
    color: var(--text-color);
    font-size: 16px;
    font-family: inherit;
    transition: all 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.btn-primary {
    width: 100%;
    padding: 12px;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow);
}

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

.btn-secondary {
    padding: 12px 20px;
    background: var(--border-color);
    color: var(--text-color);
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.2s;
}

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

.error-message {
    color: #f44336;
    margin-top: 10px;
    display: none;
    text-align: center;
}

.back-link {
    display: block;
    text-align: center;
    margin-top: 20px;
    color: var(--accent-color);
    text-decoration: none;
}

.back-link:hover {
    text-decoration: underline;
}

.admin-container {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.admin-section {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 2px 10px var(--shadow);
}

.admin-section h2 {
    margin-bottom: 20px;
    color: var(--accent-color);
}

.chords-hint {
    background: var(--bg-color);
    border: 1px solid var(--accent-color);
    border-radius: 8px;
    padding: 10px;
    margin-bottom: 15px;
    color: var(--text-color);
}

.chords-hint small {
    color: var(--accent-color);
    font-weight: 500;
}

.chords-mode-hint {
    background: var(--bg-color);
    border: 2px solid var(--accent-color);
    border-radius: 8px;
    padding: 10px;
    margin-top: 10px;
    margin-bottom: 15px;
}

.chords-mode-hint small {
    color: var(--accent-color);
    font-weight: 500;
}

.btn-add.active {
    background: #4CAF50;
    box-shadow: 0 0 10px rgba(76, 175, 80, 0.5);
}

.part-text-container {
    position: relative;
}

.chords-preview {
    margin-top: 10px;
    padding: 10px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-family: monospace;
    font-size: 0.9em;
}

.chords-preview .chord-line {
    display: flex;
    align-items: center;
    padding: 4px;
    margin: 2px 0;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.2s;
}

.chords-preview .chord-line:hover {
    background: var(--card-bg);
}

.chords-preview .chord-display {
    min-width: 60px;
    color: var(--accent-color);
    font-weight: bold;
    margin-right: 10px;
}

.chords-preview .chord-display.empty {
    color: var(--border-color);
    font-style: italic;
}

.chords-preview .chord-display.empty::before {
    content: '[кликните для добавления]';
    font-size: 0.8em;
}

.chords-preview .text-display {
    flex: 1;
}

.song-editor {
    margin-top: 15px;
}

.song-parts {
    margin-bottom: 20px;
}

.song-part {
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 15px;
}

.part-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.part-label {
    font-weight: bold;
    color: var(--accent-color);
}

.btn-remove {
    background: #f44336;
    color: white;
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.btn-remove:hover {
    transform: scale(1.1);
    background: #d32f2f;
}

.part-text {
    width: 100%;
    min-height: 80px;
    resize: vertical;
    font-family: inherit;
}

.chords-input {
    width: 100%;
    padding: 10px;
    font-size: 16px;
    font-family: monospace;
}

.chords-help {
    margin-top: 8px;
    color: var(--text-color);
    opacity: 0.7;
}

.editor-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.btn-add {
    padding: 10px 15px;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-add:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow);
}

.form-actions {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.form-actions .btn-primary {
    flex: 1;
}

.admin-songs-list {
    max-height: 500px;
    overflow-y: auto;
}

.admin-song-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
    transition: background 0.2s;
}

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

.admin-song-item:last-child {
    border-bottom: none;
}

.song-info {
    flex: 1;
}

.song-actions {
    display: flex;
    gap: 10px;
}

.btn-small {
    padding: 6px 12px;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
}

.btn-small:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 4px var(--shadow);
}

.btn-small.btn-danger {
    background: #f44336;
}

.btn-small.btn-danger:hover {
    background: #d32f2f;
}

/* Модальное окно */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    overflow: auto;
}

.modal-content {
    background-color: var(--card-bg);
    margin: 5% auto;
    padding: 30px;
    border-radius: 15px;
    max-width: 700px;
    width: 90%;
    box-shadow: 0 4px 20px var(--shadow);
    position: relative;
}

.modal-close {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 28px;
    font-weight: bold;
    color: var(--text-color);
    cursor: pointer;
    transition: all 0.2s;
}

.modal-close:hover {
    color: var(--accent-color);
    transform: scale(1.2);
}

.preview-content {
    margin-top: 20px;
}

.preview-content h3 {
    color: var(--accent-color);
    margin-bottom: 20px;
}

.preview-text {
    white-space: pre-line;
    line-height: 2;
    font-size: 1em;
}

.preview-text .chord {
    color: var(--accent-color);
    font-weight: bold;
    font-size: 0.9em;
    vertical-align: super;
    margin: 0 2px;
}

/* Адаптивность для админ-панели */
@media (max-width: 600px) {
    .login-container {
        margin: 50px auto;
        padding: 25px;
    }

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

    .btn-add {
        width: 100%;
    }

    .form-actions {
        flex-direction: column;
    }

    .admin-song-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .song-actions {
        width: 100%;
        justify-content: space-between;
    }

    .song-actions .btn-small {
        flex: 1;
        text-align: center;
    }

    .modal-content {
        margin: 10% auto;
        padding: 20px;
    }
}