/* CSS Reset & Variables */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #8B5CF6;
    --primary-dark: #7C3AED;
    --secondary: #EC4899;
    --bg-dark: #0F0F1A;
    --bg-card: rgba(255, 255, 255, 0.05);
    --bg-card-hover: rgba(255, 255, 255, 0.08);
    --text-primary: #FFFFFF;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.4);
    --border: rgba(255, 255, 255, 0.1);
    --border-hover: rgba(255, 255, 255, 0.2);
    --gradient-primary: linear-gradient(135deg, #8B5CF6 0%, #EC4899 100%);
    --gradient-dark: linear-gradient(180deg, #1a1a2e 0%, #0F0F1A 100%);
    --shadow-glow: 0 0 40px rgba(139, 92, 246, 0.3);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 24px;
}

html {
    font-size: 16px;
}

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

/* Background Effects */
.background-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 20s ease-in-out infinite;
}

.blob-1 {
    width: 600px;
    height: 600px;
    background: var(--primary);
    top: -200px;
    right: -200px;
}

.blob-2 {
    width: 500px;
    height: 500px;
    background: var(--secondary);
    bottom: -150px;
    left: -150px;
    animation-delay: -5s;
}

.blob-3 {
    width: 400px;
    height: 400px;
    background: #3B82F6;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -10s;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    33% {
        transform: translate(30px, -30px) scale(1.05);
    }

    66% {
        transform: translate(-20px, 20px) scale(0.95);
    }
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 3rem;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.tagline {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 300;
}

/* Mode Tabs */
.mode-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.mode-tab {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.mode-tab:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.mode-tab.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.4);
}

.mode-tab svg {
    flex-shrink: 0;
}

/* Upload Section */
.upload-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.upload-section h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 2rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.upload-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    width: 100%;
    max-width: 800px;
    margin-bottom: 2rem;
}

.upload-box {
    position: relative;
    aspect-ratio: 16/9;
    background: var(--bg-card);
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.3s ease;
    overflow: hidden;
}

.upload-box:hover {
    border-color: var(--primary);
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.upload-box.dragging {
    border-color: var(--secondary);
    background: rgba(236, 72, 153, 0.1);
}

.upload-box.has-video {
    border-style: solid;
    border-color: var(--primary);
}

.upload-content {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 1.5rem;
    transition: opacity 0.3s ease;
}

.upload-box.has-video .upload-content {
    opacity: 0;
    pointer-events: none;
}

.upload-icon {
    color: var(--primary);
    transition: transform 0.3s ease;
}

.upload-box:hover .upload-icon {
    transform: translateY(-5px);
}

.upload-text {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.upload-hint {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.upload-preview {
    position: absolute;
    inset: 0;
    display: none;
}

.upload-box.has-video .upload-preview {
    display: block;
}

.upload-preview video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: calc(var(--radius-lg) - 2px);
}

.file-name {
    position: absolute;
    bottom: 12px;
    left: 12px;
    right: 50px;
    padding: 8px 12px;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.remove-btn {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 32px;
    height: 32px;
    background: rgba(239, 68, 68, 0.9);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.remove-btn:hover {
    background: #EF4444;
    transform: scale(1.1);
}

/* Compare Button */
.compare-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 40px;
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-xl);
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.4);
}

.compare-btn:not(:disabled):hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(139, 92, 246, 0.5);
}

.compare-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: none;
}

/* Compare Section */
.compare-section {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.compare-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.back-btn:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
}

.video-labels {
    display: flex;
    gap: 2rem;
}

.label {
    padding: 8px 20px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.label-left {
    border-left: 3px solid var(--primary);
}

.label-right {
    border-right: 3px solid var(--secondary);
}

/* Compare Container */
.compare-container {
    position: relative;
    width: 100%;
    aspect-ratio: 16/9;
    background: #000;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: ew-resize;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.video-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.video-right-wrapper {
    clip-path: inset(0 0 0 50%);
}

.compare-video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #000;
}

.slider-line {
    position: absolute;
    top: 0;
    left: 50%;
    width: 4px;
    height: 100%;
    background: white;
    transform: translateX(-50%);
    cursor: ew-resize;
    z-index: 10;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

.slider-handle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 48px;
    height: 48px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-dark);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    transition: transform 0.2s ease;
}

.slider-handle:hover {
    transform: translate(-50%, -50%) scale(1.1);
}

/* Controls */
.controls {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(20px);
}

.controls-row {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.control-btn {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.control-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

.progress-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    cursor: pointer;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: var(--gradient-primary);
    border-radius: 4px;
    transition: width 0.1s linear;
}

.time-display {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
}

.volume-control {
    display: flex;
    align-items: center;
    gap: 8px;
}

.volume-control .control-btn {
    width: 40px;
    height: 40px;
    background: var(--bg-card-hover);
}

.volume-slider {
    width: 80px;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    cursor: pointer;
}

.volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    background: white;
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.volume-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.slider-position-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.slider-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.slider-position {
    flex: 1;
    height: 8px;
    -webkit-appearance: none;
    appearance: none;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    cursor: pointer;
}

.slider-position::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--gradient-primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(139, 92, 246, 0.4);
    transition: transform 0.2s ease;
}

.slider-position::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.slider-value {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
    min-width: 40px;
    text-align: right;
}

/* Uniqueize Section */
.uniqueize-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.uniqueize-section h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 2rem;
    text-align: center;
}

.uniqueize-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    width: 100%;
    max-width: 1000px;
    margin-bottom: 2rem;
}

.uniqueize-upload {
    position: relative;
    aspect-ratio: 16/9;
    background: var(--bg-card);
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.3s ease;
    overflow: hidden;
}

.uniqueize-upload:hover {
    border-color: var(--primary);
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.uniqueize-upload.has-video {
    border-style: solid;
    border-color: var(--primary);
}

.uniqueize-upload.has-video .upload-content {
    opacity: 0;
    pointer-events: none;
}

.uniqueize-preview {
    position: absolute;
    inset: 0;
    display: none;
}

.uniqueize-upload.has-video .uniqueize-preview {
    display: block;
}

.uniqueize-preview video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: calc(var(--radius-lg) - 2px);
}

.video-info {
    position: absolute;
    bottom: 12px;
    left: 12px;
    right: 50px;
    padding: 8px 12px;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Settings Panel */
.settings-panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    backdrop-filter: blur(20px);
    max-height: 500px;
    overflow-y: auto;
}

.settings-panel::-webkit-scrollbar {
    width: 6px;
}

.settings-panel::-webkit-scrollbar-track {
    background: transparent;
}

.settings-panel::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

.settings-panel h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.settings-group {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.settings-group:last-of-type {
    border-bottom: none;
    margin-bottom: 1rem;
}

.settings-group h4 {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.settings-group h4 svg {
    color: var(--primary);
}

.option-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 0.75rem;
    padding: 8px 0;
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    min-width: 0;
    font-size: 0.875rem;
    color: var(--text-primary);
    cursor: pointer;
    user-select: none;
}

.toggle-label input[type="checkbox"] {
    display: none;
}

.toggle-switch {
    position: relative;
    width: 40px;
    height: 22px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 11px;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.toggle-switch::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 16px;
    height: 16px;
    background: white;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.toggle-label input[type="checkbox"]:checked+.toggle-switch {
    background: var(--gradient-primary);
}

.toggle-label input[type="checkbox"]:checked+.toggle-switch::after {
    left: 21px;
}

.intensity-slider {
    width: 80px;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    cursor: pointer;
    flex-shrink: 0;
}

.intensity-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.intensity-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.option-value {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
    min-width: 35px;
    text-align: right;
}

/* Resolution Options */
.resolution-options {
    display: flex;
    gap: 8px;
}

.resolution-option {
    flex: 1;
    cursor: pointer;
}

.resolution-option input[type="radio"] {
    display: none;
}

.resolution-label {
    display: block;
    padding: 10px 12px;
    background: var(--bg-card-hover);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    text-align: center;
    transition: all 0.2s ease;
}

.resolution-option input[type="radio"]:checked+.resolution-label {
    background: rgba(139, 92, 246, 0.2);
    border-color: var(--primary);
    color: var(--primary);
}

.resolution-label:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--border-hover);
}

/* Preset Buttons */
.preset-buttons {
    display: flex;
    gap: 8px;
    margin-top: 1rem;
}

.preset-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 12px;
    background: var(--bg-card-hover);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.preset-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.preset-btn.active {
    background: rgba(139, 92, 246, 0.2);
    border-color: var(--primary);
    color: var(--primary);
}

.preset-btn span {
    font-size: 1rem;
}

/* Process Area */
.process-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    width: 100%;
    max-width: 500px;
}

.process-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 18px 48px;
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-xl);
    color: white;
    font-size: 1.15rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.4);
}

.process-btn:not(:disabled):hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(139, 92, 246, 0.5);
}

.process-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: none;
}

.process-btn svg {
    animation: none;
}

.process-btn.processing svg {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

.process-progress {
    width: 100%;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1rem;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 0.875rem;
}

.progress-info span:first-child {
    color: var(--text-secondary);
}

.progress-info span:last-child {
    color: var(--primary);
    font-weight: 600;
}

.progress-bar-container {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    background: var(--gradient-primary);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 40px;
    background: linear-gradient(135deg, #10B981 0%, #059669 100%);
    border: none;
    border-radius: var(--radius-xl);
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(16, 185, 129, 0.4);
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(16, 185, 129, 0.5);
}

/* Footer */
.footer {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

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

    .compare-header {
        flex-direction: column;
        gap: 1rem;
    }

    .controls-row {
        flex-wrap: wrap;
    }

    .progress-container {
        order: 3;
        width: 100%;
    }

    .volume-control {
        order: 2;
    }

    .slider-position-row {
        flex-wrap: wrap;
    }

    .slider-position {
        width: 100%;
        order: 3;
    }

    .mode-tabs {
        flex-direction: column;
        width: 100%;
    }

    .mode-tab {
        width: 100%;
        justify-content: center;
    }

    .uniqueize-layout {
        grid-template-columns: 1fr;
    }

    .settings-panel {
        max-height: none;
    }

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

    .process-btn {
        width: 100%;
        justify-content: center;
        padding: 16px 24px;
    }

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