/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 2rem 0;
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    color: #2c3e50;
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

header p {
    color: #7f8c8d;
    font-size: 1.1rem;
}

/* Main Content */
main {
    padding: 0 0 2rem 0;
}

section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

section h2 {
    color: #2c3e50;
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

/* Upload Section */
.upload-area {
    border: 3px dashed #3498db;
    border-radius: 15px;
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

.upload-area:hover {
    border-color: #2980b9;
    background: #e3f2fd;
    transform: translateY(-2px);
}

.upload-area.drag-over {
    border-color: #27ae60;
    background: #e8f5e8;
}

.upload-content {
    pointer-events: none;
}

.upload-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.7;
}

.upload-area h3 {
    color: #2c3e50;
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.upload-area p {
    color: #7f8c8d;
    font-size: 1rem;
}

.file-info {
    margin-top: 1rem;
    padding: 1rem;
    background: #e8f5e8;
    border-radius: 10px;
    border-left: 4px solid #27ae60;
}

.file-info p {
    margin-bottom: 0.5rem;
}

/* Preview Section */
.image-preview {
    text-align: center;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.image-preview img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Settings Section */
.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.setting-group label {
    font-weight: 600;
    color: #2c3e50;
    font-size: 1.1rem;
}

.setting-group input[type="range"] {
    width: 100%;
    height: 8px;
    border-radius: 5px;
    background: #ddd;
    outline: none;
    -webkit-appearance: none;
}

.setting-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #3498db;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.setting-group input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #3498db;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.setting-group select {
    padding: 0.75rem;
    border: 2px solid #e1e8ed;
    border-radius: 8px;
    font-size: 1rem;
    background: white;
    cursor: pointer;
    transition: border-color 0.3s ease;
}

.setting-group select:focus {
    outline: none;
    border-color: #3498db;
}

#sensitivityValue {
    align-self: center;
    background: #3498db;
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-weight: 600;
    min-width: 40px;
    text-align: center;
}

/* Action Section */
.action-section {
    text-align: center;
}

.analyze-btn {
    background: linear-gradient(45deg, #27ae60, #2ecc71);
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(39, 174, 96, 0.3);
}

.analyze-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(39, 174, 96, 0.4);
}

.analyze-btn:disabled {
    background: #bdc3c7;
    cursor: not-allowed;
    box-shadow: none;
}

/* Analyze Another Button */
.analyze-another-section {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid #e9ecef;
}

.analyze-another-btn {
    background: linear-gradient(45deg, #3498db, #2980b9);
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

.analyze-another-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(52, 152, 219, 0.4);
}

/* Results Section */
.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.result-card {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border-radius: 15px;
    padding: 1.5rem;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.result-card h3 {
    color: #2c3e50;
    font-size: 1.1rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.percentage-display {
    font-size: 3rem;
    font-weight: 700;
    color: #27ae60;
    margin-bottom: 0.5rem;
}

.pixel-count, .processing-time {
    font-size: 1.5rem;
    font-weight: 600;
    color: #3498db;
}

.processed-image {
    text-align: center;
    margin-top: 2rem;
}

.processed-image h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
}

#processedCanvas {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

/* Footer */
footer {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 2rem 0;
    text-align: center;
    margin-top: 2rem;
}

footer p {
    color: #7f8c8d;
    font-size: 0.9rem;
}

/* Loading Animation */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.loading {
    animation: pulse 1.5s ease-in-out infinite;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.show {
    display: block !important;
}

.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}