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

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

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

header {
    text-align: center;
    margin-bottom: 50px;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    background: linear-gradient(90deg, #e94560, #f39c12);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: #aaaaaa;
    font-size: 1.1rem;
}

main {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 40px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 50px;
}

.upload-section {
    max-width: 500px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #cccccc;
    font-size: 0.95rem;
}

.form-group input[type="text"] {
    width: 100%;
    padding: 15px;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.05);
    color: #ffffff;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input[type="text"]:focus {
    outline: none;
    border-color: #e94560;
}

.form-group input[type="text"]::placeholder,
.form-group input[type="number"]::placeholder {
    color: #666666;
}

.form-row {
    display: flex;
    gap: 20px;
}

.form-group.half {
    flex: 1;
}

.form-group select,
.form-group input[type="number"] {
    width: 100%;
    padding: 15px;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.05);
    color: #ffffff;
    font-size: 1rem;
    transition: border-color 0.3s;
    appearance: none;
}

.form-group select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23aaa' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 15px center;
    padding-right: 40px;
}

.form-group select option {
    background: #1a1a2e;
    color: #ffffff;
}

.form-group select:focus,
.form-group input[type="number"]:focus {
    outline: none;
    border-color: #e94560;
}

.input-hint {
    display: block;
    font-size: 0.8rem;
    color: #666666;
    margin-top: 5px;
}

@media (max-width: 600px) {
    .form-row {
        flex-direction: column;
        gap: 0;
    }
}

.save-load-section {
    margin-top: 25px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.save-load-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.preset-input {
    flex: 1;
    min-width: 120px;
    padding: 10px 15px;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
    color: #ffffff;
    font-size: 0.9rem;
}

.preset-input:focus {
    outline: none;
    border-color: #e94560;
}

.preset-input::placeholder {
    color: #666666;
}

.save-btn, .load-btn, .clear-btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s;
}

.save-btn {
    background: linear-gradient(90deg, #2ecc71, #27ae60);
    color: white;
}

.save-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(46, 204, 113, 0.3);
}

.load-btn {
    background: linear-gradient(90deg, #3498db, #2980b9);
    color: white;
}

.load-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.3);
}

.clear-btn {
    background: rgba(255, 255, 255, 0.1);
    color: #aaaaaa;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.clear-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    color: #ffffff;
}

.preset-list {
    margin-top: 15px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.preset-label {
    color: #888888;
    font-size: 0.85rem;
    margin-bottom: 10px;
}

.preset-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 15px;
    margin-bottom: 8px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    transition: background 0.3s;
}

.preset-item:hover {
    background: rgba(255, 255, 255, 0.08);
}

.preset-item-name {
    color: #ffffff;
    font-size: 0.95rem;
}

.preset-item-actions {
    display: flex;
    gap: 8px;
}

.preset-item-btn {
    padding: 5px 12px;
    border: none;
    border-radius: 5px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.3s;
}

.preset-item-btn.use {
    background: #3498db;
    color: white;
}

.preset-item-btn.delete {
    background: rgba(231, 76, 60, 0.2);
    color: #e74c3c;
}

.preset-item-btn.delete:hover {
    background: #e74c3c;
    color: white;
}

.no-presets {
    color: #666666;
    font-style: italic;
    text-align: center;
    padding: 10px;
}

@media (max-width: 600px) {
    .save-load-row {
        flex-direction: column;
    }
    
    .preset-input {
        width: 100%;
    }
}

.file-upload-wrapper {
    position: relative;
}

.file-upload-wrapper input[type="file"] {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
    z-index: 2;
}

.file-upload-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    border: 2px dashed rgba(233, 69, 96, 0.5);
    border-radius: 15px;
    background: rgba(233, 69, 96, 0.05);
    transition: all 0.3s;
    cursor: pointer;
}

.file-upload-wrapper:hover .file-upload-btn {
    border-color: #e94560;
    background: rgba(233, 69, 96, 0.1);
}

.file-icon {
    font-size: 3rem;
    margin-bottom: 10px;
}

.file-text {
    color: #aaaaaa;
}

.file-name {
    display: none;
    margin-top: 15px;
    padding: 12px 20px;
    background: rgba(46, 204, 113, 0.1);
    border: 1px solid rgba(46, 204, 113, 0.3);
    border-radius: 8px;
    color: #2ecc71;
    text-align: center;
}

.submit-btn {
    width: 100%;
    padding: 18px;
    background: linear-gradient(90deg, #e94560, #f39c12);
    border: none;
    border-radius: 10px;
    color: #ffffff;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
}

.submit-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(233, 69, 96, 0.3);
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.status-section {
    text-align: center;
    padding: 40px;
}

.status-content {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(233, 69, 96, 0.2);
    border-top-color: #e94560;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}

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

.status-message {
    color: #aaaaaa;
    font-size: 1.1rem;
}

.result-section {
    text-align: center;
    padding: 40px;
}

.result-content h2 {
    color: #2ecc71;
    margin-bottom: 20px;
}

.result-details {
    margin-bottom: 30px;
}

.result-details p {
    margin: 10px 0;
    color: #cccccc;
}

.download-btn {
    display: inline-block;
    padding: 15px 40px;
    background: linear-gradient(90deg, #2ecc71, #27ae60);
    color: #ffffff;
    text-decoration: none;
    border-radius: 10px;
    font-weight: 600;
    transition: transform 0.3s, box-shadow 0.3s;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(46, 204, 113, 0.3);
}

.refinement-note {
    color: #aaaaaa;
    font-size: 0.9rem;
    font-style: italic;
    margin-bottom: 20px;
}

.error-section {
    text-align: center;
    padding: 40px;
}

.error-content h2 {
    color: #e74c3c;
    margin-bottom: 15px;
}

.error-message {
    color: #cccccc;
    margin-bottom: 25px;
}

.retry-btn {
    padding: 12px 30px;
    background: transparent;
    border: 2px solid #e74c3c;
    color: #e74c3c;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
}

.retry-btn:hover {
    background: #e74c3c;
    color: #ffffff;
}

footer {
    margin-top: 30px;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.feature {
    text-align: center;
    padding: 30px 20px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: transform 0.3s;
}

.feature:hover {
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 15px;
}

.feature h3 {
    color: #ffffff;
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.feature p {
    color: #888888;
    font-size: 0.9rem;
    line-height: 1.5;
}

@media (max-width: 600px) {
    header h1 {
        font-size: 1.8rem;
    }
    
    main {
        padding: 25px;
    }
    
    .file-upload-btn {
        padding: 30px;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
}