/* =============================================
   Audio Tag Editor - CSS Styles
   ============================================= */

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

:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: #1a2332;
    --bg-input: #0d1320;
    --border-color: #2a3a50;
    --text-primary: #ffffff;
    --text-secondary: #8b9cb5;
    --accent-primary: #d4a024;
    --accent-secondary: #e8b830;
    --accent-gradient: linear-gradient(135deg, #e8b830 0%, #d4a024 100%);
    --success-color: #00d4aa;
    --error-color: #ff6b6b;
    --warning-color: #ffd93d;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0;
    flex-wrap: wrap;
    gap: 15px;
}

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

.logo-icon {
    width: 60px;
    height: 60px;
    background: var(--accent-gradient);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    box-shadow: 0 8px 32px rgba(212, 160, 36, 0.3);
}

.logo-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.logo-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-title .highlight {
    color: var(--accent-primary);
}

.logo-subtitle {
    font-size: 11px;
    color: var(--text-secondary);
    letter-spacing: 2px;
    font-weight: 500;
}

/* Language Switcher */
.lang-switcher {
    display: flex;
    gap: 8px;
    background: var(--bg-card);
    padding: 6px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    background: transparent;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-secondary);
}

.lang-btn:hover {
    background: var(--bg-input);
}

.lang-btn.active {
    background: var(--accent-gradient);
    color: var(--bg-primary);
}

.lang-btn .lang-code {
    font-size: 12px;
    font-weight: 600;
}

.flag-icon {
    width: 20px;
    height: 20px;
    object-fit: contain;
    border-radius: 2px;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 25px;
}

/* Upload Section */
.upload-section {
    margin-bottom: 10px;
}

.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 16px;
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--bg-card);
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--accent-primary);
    background: rgba(0, 212, 170, 0.05);
}

.upload-icon {
    font-size: 48px;
    margin-bottom: 15px;
    opacity: 0.7;
}

.upload-text {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.upload-subtext {
    font-size: 13px;
    color: var(--text-secondary);
}

.filename {
    margin-top: 15px;
    font-size: 14px;
    color: var(--accent-primary);
    font-weight: 500;
    word-break: break-all;
}

/* Player Section */
.player-section {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 25px;
    border: 1px solid var(--border-color);
}

.player-container {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.cover-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex-shrink: 0;
    width: 120px;
}

.cover-art {
    width: 120px;
    height: 120px;
    background: var(--bg-input);
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
}

.cover-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 11px;
    text-align: center;
}

.cover-btn {
    background: var(--accent-gradient);
    color: var(--bg-primary);
    border: none;
    padding: 5px 12px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease;
    margin-top: 8px;
}

.cover-btn:hover {
    transform: scale(1.05);
}

#coverImage {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 10px;
}

.player-controls {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.play-btn {
    background: var(--accent-gradient);
    color: var(--bg-primary);
    border: none;
    padding: 14px 30px;
    border-radius: 30px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(212, 160, 36, 0.3);
}

.play-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(212, 160, 36, 0.4);
}

.progress-container {
    width: 100%;
}

.progress-bar {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg-input);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

.progress-bar::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    background: var(--accent-primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(212, 160, 36, 0.5);
}

.progress-bar::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: var(--accent-primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

.time-display {
    display: flex;
    justify-content: space-between;
    margin-top: 8px;
    font-size: 12px;
    color: var(--text-secondary);
}

/* Metadata Section */
.metadata-section {
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: 25px;
    border: 1px solid var(--border-color);
}

.section-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--accent-primary);
    letter-spacing: 2px;
    margin-bottom: 25px;
}

/* Format Compatibility Info */
.format-info {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
    padding: 12px 15px;
    background: rgba(0, 212, 170, 0.05);
    border-radius: 10px;
    font-size: 12px;
    color: var(--text-secondary);
    flex-wrap: wrap;
}

.format-badge {
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 600;
}

.format-badge.mp3 {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.format-badge.wav {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

/* WAV/MP3 Badge in Labels */
.wav-badge {
    font-size: 9px;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 4px;
    background: rgba(0, 212, 170, 0.2);
    color: var(--success-color);
    margin-left: 6px;
}

.mp3-badge {
    font-size: 9px;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 4px;
    background: rgba(102, 126, 234, 0.2);
    color: #a0aeff;
    margin-left: 6px;
}

.mp3-check-badge {
    font-size: 9px;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 4px;
    background: rgba(102, 126, 234, 0.2);
    color: #a0aeff;
    margin-left: 6px;
}

/* Cover Art Note */
.cover-note {
    margin-top: 15px;
    padding: 12px 15px;
    background: rgba(255, 217, 61, 0.1);
    border-radius: 10px;
    font-size: 12px;
    color: var(--text-secondary);
    border-left: 3px solid var(--warning-color);
}

/* Disabled field appearance for WAV */
.form-group.wav-disabled {
    opacity: 0.5;
    pointer-events: none;
}

.form-group.wav-disabled input,
.form-group.wav-disabled select,
.form-group.wav-disabled textarea {
    background: rgba(255, 255, 255, 0.02);
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 14px 16px;
    font-size: 14px;
    color: var(--text-primary);
    font-family: inherit;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(212, 160, 36, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

.form-group select {
    cursor: pointer;
}

.form-group select option {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.form-row {
    display: flex;
    gap: 15px;
}

.form-group.half {
    flex: 1;
}

/* Export Section */
.export-section {
    margin-top: 10px;
    text-align: center;
}

.export-btn {
    background: var(--accent-gradient);
    color: var(--bg-primary);
    border: none;
    padding: 18px 40px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
    box-shadow: 0 6px 30px rgba(212, 160, 36, 0.35);
}

.export-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 40px rgba(212, 160, 36, 0.45);
}

.export-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.export-icon {
    font-size: 18px;
}

.export-note {
    margin-top: 15px;
    font-size: 13px;
    color: var(--text-secondary);
}

.export-note.warning {
    color: var(--warning-color);
}

/* Footer */
.footer {
    text-align: center;
    padding: 25px 0;
    margin-top: 20px;
}

.footer p {
    font-size: 12px;
    color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 600px) {
    .container {
        padding: 15px;
    }

    /* Header - Stack vertically and center */
    .header {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 15px;
    }

    .logo {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }

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

    .logo-title {
        font-size: 20px;
        text-align: center;
    }

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

    /* Language Switcher - Center under logo */
    .lang-switcher {
        margin: 0 auto;
    }

    /* Player Section - Stack and center everything */
    .player-section {
        padding: 20px;
    }

    .player-container {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 20px;
    }

    .cover-wrapper {
        width: 100%;
        max-width: 160px;
        margin: 0 auto;
    }

    .cover-art {
        width: 140px;
        height: 140px;
        margin: 0 auto;
    }

    .cover-btn {
        display: block;
        margin: 10px auto 0;
    }

    /* Player controls - Full width and centered */
    .player-controls {
        width: 100%;
        align-items: center;
    }

    .play-btn {
        width: 100%;
        max-width: 200px;
        margin: 0 auto;
        display: block;
    }

    .progress-container {
        width: 100%;
    }

    /* Form rows */
    .form-row {
        flex-direction: column;
        gap: 0;
    }

    .form-group.half {
        width: 100%;
    }

    /* Export button - smaller and compact */
    .export-btn {
        width: auto;
        padding: 12px 24px;
        font-size: 13px;
        white-space: nowrap;
    }

    .export-icon {
        font-size: 14px;
    }

    /* Format info - stack in 2 rows on mobile */
    .format-info {
        display: grid;
        grid-template-columns: auto 1fr;
        gap: 6px 8px;
        padding: 10px 12px;
        font-size: 11px;
        align-items: center;
    }

    .format-info .format-badge {
        padding: 3px 8px;
        font-size: 10px;
    }

    .format-info>span {
        font-size: 11px;
    }
}

/* Loading Animation */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 3px solid transparent;
    border-top-color: var(--bg-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-card);
    color: var(--text-primary);
    padding: 15px 25px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 500;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
}

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

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

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