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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    min-height: 100vh;
    color: #e4e4e7;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px;
}

header {
    text-align: center;
    margin-bottom: 40px;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #a855f7 0%, #6366f1 50%, #3b82f6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.subtitle {
    font-size: 1.1rem;
    color: #a1a1aa;
    font-weight: 400;
}

main {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.upload-section {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 32px;
}

.upload-area {
    border: 2px dashed rgba(139, 92, 246, 0.4);
    border-radius: 12px;
    padding: 48px 24px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: rgba(139, 92, 246, 0.05);
}

.upload-area:hover,
.upload-area.dragover {
    border-color: #8b5cf6;
    background: rgba(139, 92, 246, 0.1);
    transform: translateY(-2px);
}

.upload-icon {
    color: #8b5cf6;
    margin-bottom: 16px;
}

.upload-text {
    font-size: 1.1rem;
    font-weight: 500;
    color: #e4e4e7;
    margin-bottom: 8px;
}

.upload-hint {
    font-size: 0.875rem;
    color: #71717a;
}

.generate-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    margin-top: 24px;
    padding: 16px 32px;
    font-size: 1rem;
    font-weight: 600;
    color: white;
    background: linear-gradient(135deg, #8b5cf6 0%, #6366f1 100%);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.generate-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(139, 92, 246, 0.4);
}

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

.btn-loading {
    display: flex;
    align-items: center;
    gap: 8px;
}

.spinner {
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.preview-section,
.result-section {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 32px;
}

h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: #e4e4e7;
}

h3 {
    font-size: 0.875rem;
    font-weight: 500;
    color: #a1a1aa;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.preview-image {
    text-align: center;
}

.preview-image img {
    max-width: 100%;
    max-height: 400px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.comparison {
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
    justify-content: center;
}

.comparison-item {
    flex: 1;
    min-width: 250px;
    text-align: center;
}

.comparison-item img {
    width: 100%;
    max-height: 400px;
    object-fit: contain;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.comparison-arrow {
    color: #8b5cf6;
    flex-shrink: 0;
}

@media (max-width: 640px) {
    .comparison-arrow {
        transform: rotate(90deg);
    }
}

.result-actions {
    display: flex;
    gap: 16px;
    margin-top: 24px;
    flex-wrap: wrap;
    justify-content: center;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 600;
    color: white;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s ease;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.4);
}

.reset-btn {
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 600;
    color: #e4e4e7;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.reset-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
}

.error-section {
    margin-top: 16px;
}

.error-message {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 12px;
    color: #fca5a5;
}

.error-message svg {
    flex-shrink: 0;
    color: #ef4444;
}

footer {
    text-align: center;
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

footer p {
    font-size: 0.875rem;
    color: #71717a;
}

@media (max-width: 640px) {
    .container {
        padding: 24px 16px;
    }

    h1 {
        font-size: 1.75rem;
    }

    .upload-area {
        padding: 32px 16px;
    }

    .comparison {
        flex-direction: column;
    }

    .comparison-item {
        min-width: 100%;
    }

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

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