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

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-dark: #0f172a;
    --bg-card: rgba(255, 255, 255, 0.5);
    --bg-input: rgba(255, 255, 255, 0.3);
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --border-color: rgba(255, 255, 255, 0.6);
    --shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 30px;
    padding: 30px 20px;
    background: var(--bg-card);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
    color: #fff;
}

.subtitle {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
}

/* Main Content */
.main-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Sections */
.text-section,
.video-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.input-panel,
.output-panel {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    padding: 24px;
    box-shadow: var(--shadow);
    flex: 1;
}

.input-panel h2,
.output-panel h2 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.input-panel h2 svg,
.output-panel h2 svg {
    stroke: var(--primary-color);
}

/* Textarea */
textarea {
    width: 100%;
    height: 200px;
    padding: 16px;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    resize: vertical;
    transition: var(--transition);
}

textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

textarea::placeholder {
    color: var(--text-muted);
}

/* Text Controls */
.text-controls {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin: 16px 0;
}

.control-group {
    display: flex;
    flex-direction: column;
}

.control-group.full-width {
    width: 100%;
}

.control-group label {
    margin-bottom: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.control-group input,
.control-group select {
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: var(--transition);
}

.control-group input:focus,
.control-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

/* Button Row */
.button-row {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

.button-row .btn {
    flex: 1;
    margin-top: 0;
}

/* Duration Display */
.duration-display {
    margin-top: 8px;
    padding-left: 0;
}

.audio-duration {
    font-size: 0.9rem;
    font-weight: 600;
    color: #000;
    background: transparent;
    border: none;
    padding: 0;
}

.supported-formats {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-left: auto;
}

/* Text Preview */
.text-preview {
    height: 200px;
    overflow-y: auto;
    padding: 16px;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(5px);
    border-radius: 8px;
    color: var(--text-primary);
    line-height: 1.8;
}

.text-preview.editable {
    resize: vertical;
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: var(--transition);
}

.text-preview.editable:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.placeholder-text {
    color: var(--text-muted);
    font-style: italic;
}

/* Upload Area */
.upload-area {
    border: 2px dashed rgba(99, 102, 241, 0.4);
    border-radius: 12px;
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(5px);
    min-height: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.upload-area:hover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.08);
}

.upload-area.dragover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.12);
}

.upload-content svg {
    stroke: var(--primary-color);
    margin-bottom: 16px;
}

.upload-content p {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.file-info {
    font-size: 0.9rem;
    color: var(--text-muted);
    display: block;
}

.upload-area-small {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: var(--bg-input);
    width: 200px;
}

.upload-area-small:hover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.05);
}

.upload-content-small svg {
    color: var(--primary-light);
    margin-bottom: 10px;
}

.upload-content-small p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Preview Container */
.preview-container {
    position: relative;
    margin-top: 20px;
    border-radius: 12px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.4);
    width: 100%;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-container video,
.preview-container img {
    width: 100%;
    height: auto;
    object-fit: contain;
    display: block;
    border-radius: 12px;
}

.image-preview {
    position: relative;
    display: inline-block;
    margin-top: 20px;
}

.image-preview img {
    max-width: 200px;
    border-radius: 12px;
}

.placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    color: var(--text-muted);
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition);
    margin-top: 16px;
    min-height: 44px;
    background: var(--primary-color);
    color: white;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.btn:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.btn:active:not(:disabled) {
    transform: translateY(0);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.85rem;
    min-height: 36px;
}

.btn-danger {
    background: var(--danger-color);
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    background: #dc2626;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4);
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

.action-buttons .btn {
    flex: 1;
    margin-top: 0;
}

/* Video Action Buttons */
.video-action-buttons {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.video-action-buttons .btn {
    flex: 1;
    margin-top: 0;
}

/* Audio Controls Section */
.audio-controls-section {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.3);
}

/* Voice Cloning Info */
.voice-cloning-info {
    margin-bottom: 16px;
}

.info-text {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    background: rgba(99, 102, 241, 0.1);
    padding: 12px;
    border-radius: 8px;
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.info-text svg {
    flex-shrink: 0;
    stroke: var(--primary-color);
}

/* Audio Action Buttons */
.audio-action-buttons {
    display: flex;
    gap: 12px;
    margin-top: 16px;
    flex-wrap: wrap;
}

.audio-action-buttons .btn {
    flex: 1;
    margin-top: 0;
    min-width: 120px;
}

/* Voice Status Display */
.voice-status-display {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: 8px;
    margin-top: 16px;
    transition: var(--transition);
}

.voice-status-display.processing {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.voice-status-display.success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.voice-status-display.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.voice-status-display.processing .status-indicator {
    background: var(--warning-color);
    animation: pulse 1.5s ease-in-out infinite;
}

.voice-status-display.success .status-indicator {
    background: var(--success-color);
}

.voice-status-display.error .status-indicator {
    background: var(--danger-color);
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.status-text {
    flex: 1;
    font-size: 0.9rem;
    font-weight: 500;
}

.voice-status-display.processing .status-text {
    color: var(--warning-color);
}

.voice-status-display.success .status-text {
    color: var(--success-color);
}

.voice-status-display.error .status-text {
    color: var(--danger-color);
}

/* Audio Player Container */
.audio-player-container {
    margin-top: 16px;
    padding: 12px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 8px;
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.audio-player-container audio {
    width: 100%;
    height: 40px;
}

/* Hide audio player controls but keep functionality */
.audio-player-container audio::-webkit-media-controls-panel {
    display: none;
}

.audio-player-container audio::-webkit-media-controls {
    display: none !important;
}

/* Status Message */
.status-message {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(5px);
    border-radius: 8px;
    margin-top: 16px;
    border: 1px solid rgba(255, 255, 255, 0.4);
}

.spinner {
    width: 20px;
    height: 20px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    padding: 12px 20px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.85rem;
    opacity: 0;
    transition: var(--transition);
    z-index: 1000;
    border: 1px solid rgba(255, 255, 255, 0.5);
    text-align: center;
}

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

.toast.success {
    border-left: 4px solid var(--success-color);
}

.toast.error {
    border-left: 4px solid var(--danger-color);
}

.toast.warning {
    border-left: 4px solid var(--warning-color);
}

/* Responsive Design - Landscape */
@media (min-width: 1024px) {
    .text-section {
        flex-direction: row;
    }

    .video-section {
        flex-direction: row;
    }

    /* Match generated video container height to uploaded video container */
    .video-section .output-panel .preview-container {
        height: auto;
        min-height: 200px;
    }

    .video-section .output-panel .preview-container {
        display: flex;
        align-items: flex-start;
    }
}

/* Responsive Design - Portrait */
@media (max-width: 1023px) {
    .text-controls {
        grid-template-columns: 1fr;
    }

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

    .header h1 {
        font-size: 2rem;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 15px;
    }

    .header {
        padding: 20px 15px;
    }

    .header h1 {
        font-size: 1.75rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .input-panel,
    .output-panel {
        padding: 20px 16px;
    }

    .upload-area {
        padding: 30px 15px;
    }

    .toast {
        left: 15px;
        right: 15px;
        bottom: 15px;
    }
}