/* ========================================
   LUMINA - Background Removal Page Styles
   ======================================== */

.page-header {
    text-align: center;
    margin-bottom: 3rem;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.page-header h1 span {
    background: linear-gradient(135deg, #00ff88 0%, #00f0ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Tool Card */
.tool-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(135deg, #00ff88 0%, #00f0ff 50%, #8b5cf6 100%);
}

/* Upload Area */
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--bg-primary);
    margin-bottom: 1.5rem;
}

.upload-area:hover {
    border-color: var(--accent-primary);
    background: rgba(0, 240, 255, 0.05);
}

.upload-area.dragover {
    border-color: #00ff88;
    background: rgba(0, 255, 136, 0.1);
    transform: scale(1.01);
}

.upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.upload-content svg {
    color: var(--accent-primary);
    margin-bottom: 8px;
    opacity: 0.7;
}

.upload-text {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin: 0;
}

.upload-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 0;
}

/* Preview Container */
.preview-container {
    margin-bottom: 1.5rem;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.preview-header h3 {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

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

.preview-image {
    max-width: 100%;
    max-height: 400px;
    border-radius: var(--radius-md);
    display: block;
    margin: 0 auto;
    border: 1px solid var(--border-color);
}

/* Form Elements */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Settings Row */
.settings-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.form-select {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: 'Outfit', sans-serif;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s ease;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%23a0a0b0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

.form-select:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.form-select option {
    background: var(--bg-secondary);
}

/* Checkbox */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    user-select: none;
    color: var(--text-primary);
    font-size: 0.95rem;
    padding: 12px 16px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    width: 100%;
}

.checkbox-label:hover {
    border-color: var(--accent-primary);
}

.checkbox-label input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    flex-shrink: 0;
}

.checkbox-label input[type="checkbox"]:checked {
    background: #00ff88;
    border-color: #00ff88;
}

.checkbox-label input[type="checkbox"]:checked::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 2px;
    width: 6px;
    height: 10px;
    border: solid var(--bg-primary);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-label input[type="checkbox"]:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.2);
}

/* Generate Button */
.btn-generate {
    width: 100%;
    padding: 16px 32px;
    font-size: 1.1rem;
    font-weight: 600;
    justify-content: center;
    background: linear-gradient(135deg, #00ff88 0%, #00f0ff 100%);
}

.btn-generate:hover {
    box-shadow: 0 0 40px rgba(0, 255, 136, 0.5);
}

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

/* Error Message */
.error-message {
    padding: 1rem;
    background: rgba(255, 0, 100, 0.1);
    border: 1px solid rgba(255, 0, 100, 0.3);
    border-radius: var(--radius-md);
    color: #ff6b9d;
    margin-top: 1rem;
    display: none;
}

.error-message.visible,
.error-message[style*="display: block"] {
    display: block;
}

/* Result Container */
.result-container {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.result-container h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 1.5rem;
    color: #00ff88;
    font-size: 1rem;
    font-weight: 500;
}

/* Comparison */
.result-comparison {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.comparison-item {
    text-align: center;
    flex: 1;
    min-width: 200px;
    max-width: 350px;
}

.comparison-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 12px;
    font-weight: 500;
}

.comparison-image {
    max-width: 100%;
    max-height: 300px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.comparison-arrow {
    color: var(--accent-primary);
    opacity: 0.5;
    flex-shrink: 0;
}

/* Transparent background pattern */
.transparent-bg {
    display: inline-block;
    background-image: 
        linear-gradient(45deg, #252530 25%, transparent 25%),
        linear-gradient(-45deg, #252530 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #252530 75%),
        linear-gradient(-45deg, transparent 75%, #252530 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
    background-color: #1a1a24;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.transparent-bg .comparison-image {
    display: block;
    border: none;
}

/* Result Info */
.result-info {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Download Button */
.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 0.95rem;
}

/* Spinner Animation */
@keyframes spin {
    to { transform: rotate(360deg); }
}

.spinner {
    animation: spin 1s linear infinite;
}

/* Responsive */
@media (max-width: 768px) {
    .tool-card {
        padding: 1.5rem;
    }
    
    .upload-area {
        padding: 2rem 1rem;
    }
    
    .result-comparison {
        flex-direction: column;
        gap: 16px;
    }
    
    .comparison-arrow {
        transform: rotate(90deg);
    }
    
    .comparison-item {
        max-width: 100%;
    }
    
    .settings-row {
        grid-template-columns: 1fr;
    }
}