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

:root {
    --primary-color: #3498db;
    --success-color: #27ae60;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --dark-color: #2c3e50;
    --light-color: #ecf0f1;
    --border-radius: 8px;
    --box-shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--dark-color);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
}

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

.header {
    text-align: center;
    color: white;
    margin-bottom: 40px;
    padding: 30px 0;
}

.header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.subtitle {
    font-size: 1.1em;
    opacity: 0.9;
}

.main-content {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 40px;
    margin-bottom: 30px;
}

section {
    margin-bottom: 40px;
}

section h2 {
    font-size: 1.8em;
    margin-bottom: 25px;
    color: var(--dark-color);
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: 10px;
}

/* Upload Section */
.upload-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.upload-box {
    border: 2px dashed var(--primary-color);
    border-radius: var(--border-radius);
    padding: 30px;
    text-align: center;
    background: #f8f9fa;
    transition: var(--transition);
    cursor: pointer;
}

.upload-box:hover {
    border-color: var(--dark-color);
    background: #fff;
    box-shadow: var(--box-shadow);
}

.upload-icon {
    font-size: 3em;
    margin-bottom: 15px;
}

.upload-box h3 {
    font-size: 1.3em;
    margin-bottom: 8px;
    color: var(--dark-color);
}

.upload-box p {
    font-size: 0.9em;
    color: #666;
    margin-bottom: 15px;
}

.file-input-wrapper {
    position: relative;
    margin-bottom: 15px;
}

.file-input {
    display: none;
}

.file-label {
    display: inline-block;
    padding: 10px 20px;
    background: var(--primary-color);
    color: white;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.file-label:hover {
    background: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.file-status {
    font-size: 0.85em;
    margin-top: 10px;
    min-height: 20px;
}

.file-status.success {
    color: var(--success-color);
}

.file-status.error {
    color: var(--danger-color);
}

.file-name {
    display: block;
    font-size: 0.9em;
    color: #666;
    margin-top: 8px;
    word-break: break-all;
}

.upload-status-summary {
    background: #d4edda;
    border: 1px solid #c3e6cb;
    border-radius: var(--border-radius);
    padding: 15px;
    margin-top: 20px;
    color: #155724;
    font-weight: 500;
    text-align: center;
}

/* Buttons */
.btn {
    padding: 12px 30px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
}

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

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.4);
}

.btn-success {
    background: var(--success-color);
    color: white;
}

.btn-success:hover:not(:disabled) {
    background: #229954;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(39, 174, 96, 0.4);
}

.btn-secondary {
    background: #95a5a6;
    color: white;
}

.btn-secondary:hover:not(:disabled) {
    background: #7f8c8d;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Reserve Space / Gap */
.radio-group {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.radio-label {
    display: flex;
    flex-direction: column;
    padding: 14px 20px;
    border: 2px solid #ddd;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    min-width: 140px;
    background: white;
}

.radio-label:has(input:checked) {
    border-color: var(--primary-color);
    background: #eaf4fe;
}

.radio-label input[type="radio"] {
    margin-bottom: 6px;
    accent-color: var(--primary-color);
    width: 16px;
    height: 16px;
}

.radio-label span {
    font-weight: 600;
    font-size: 1em;
    color: var(--dark-color);
}

.radio-label small {
    font-size: 0.8em;
    color: #888;
    margin-top: 3px;
}

/* Teeth Chart */
.teeth-hint {
    font-size: 0.88em;
    color: #888;
    margin-bottom: 14px;
    font-style: italic;
}

.teeth-chart {
    user-select: none;
    background: linear-gradient(180deg, #fafafa 0%, #f0f0f0 100%);
    border-radius: var(--border-radius);
    padding: 16px;
    border: 1px solid #d0d0d0;
}

.teeth-row-label {
    font-size: 0.75em;
    font-weight: 800;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 8px;
    margin-top: 12px;
    text-align: center;
}

.teeth-arch {
    background: white;
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 12px;
    border: 1px solid #e5e5e5;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.05);
}

.upper-arch {
    border-bottom: 2px solid #e0e0e0;
}

.teeth-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.quadrant {
    display: flex;
    gap: 6px;
}

.arch-divider {
    font-size: 1.2em;
    color: #d0d0d0;
    padding: 0 6px;
    align-self: center;
}

.tooth-cell {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

/* Extraction Tooth Buttons */
.tooth-btn.extraction-tooth {
    width: 40px;
    height: 40px;
    border: 2px solid #999;
    border-radius: 4px;
    background: linear-gradient(135deg, #f5f5f5 0%, #e8e8e8 100%);
    font-size: 0.75em;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    color: #333;
    padding: 0;
    position: relative;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.tooth-btn.extraction-tooth:hover {
    border-color: var(--danger-color);
    transform: translateY(-1px);
    box-shadow: 0 3px 6px rgba(231, 76, 60, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.tooth-btn.extraction-tooth.active {
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a5a 100%);
    border-color: #c92a2a;
    color: white;
    font-weight: 700;
    box-shadow: 0 3px 8px rgba(231, 76, 60, 0.4), inset 0 1px 2px rgba(255, 255, 255, 0.3);
}

/* Reserve Space Tooth Buttons */
.tooth-btn.gap-tooth {
    width: 40px;
    height: 40px;
    border: 2px solid #999;
    border-radius: 4px;
    background: linear-gradient(135deg, #f5f5f5 0%, #e8e8e8 100%);
    font-size: 0.75em;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    color: #333;
    padding: 0;
    position: relative;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.tooth-btn.gap-tooth:hover {
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: 0 3px 6px rgba(52, 152, 219, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.tooth-btn.gap-tooth.active {
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    border-color: #1e5a96;
    color: white;
    font-weight: 700;
    box-shadow: 0 3px 8px rgba(52, 152, 219, 0.4), inset 0 1px 2px rgba(255, 255, 255, 0.3);
}

/* Gap Input Field */
.tooth-gap-input {
    width: 40px;
    height: 30px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 0.75em;
    text-align: center;
    padding: 3px;
    display: none;
    transition: var(--transition);
    -moz-appearance: textfield;
}

.tooth-gap-input::-webkit-outer-spin-button,
.tooth-gap-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
}

.tooth-gap-input.visible {
    display: block;
}

.tooth-gap-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(52,152,219,0.15);
}

/* Locked Teeth Buttons */
.tooth-btn.locked-tooth {
    width: 40px;
    height: 40px;
    border: 2px solid #999;
    border-radius: 4px;
    background: linear-gradient(135deg, #f5f5f5 0%, #e8e8e8 100%);
    font-size: 0.75em;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    color: #333;
    padding: 0;
    position: relative;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.tooth-btn.locked-tooth:hover {
    border-color: var(--warning-color);
    transform: translateY(-1px);
    box-shadow: 0 3px 6px rgba(243, 156, 18, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.tooth-btn.locked-tooth.active {
    background: linear-gradient(135deg, #f39c12 0%, #d68910 100%);
    border-color: #b7770d;
    color: white;
    font-weight: 700;
    box-shadow: 0 3px 8px rgba(243, 156, 18, 0.45), inset 0 1px 2px rgba(255, 255, 255, 0.3);
}

.tooth-btn.locked-tooth.active::before {
    content: '🔒';
    position: absolute;
    top: -9px;
    right: -7px;
    font-size: 11px;
    line-height: 1;
}

/* Submit Loading Overlay */
.submit-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 15, 30, 0.75);
    backdrop-filter: blur(4px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.submit-overlay-box {
    background: white;
    border-radius: 16px;
    padding: 40px 48px;
    text-align: center;
    max-width: 420px;
    width: 100%;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.4);
    animation: overlayIn 0.25s ease;
}

@keyframes overlayIn {
    from { opacity: 0; transform: scale(0.92); }
    to   { opacity: 1; transform: scale(1); }
}

.submit-spinner {
    width: 60px;
    height: 60px;
    border: 5px solid #e0e0e0;
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.9s linear infinite;
    margin: 0 auto 24px;
}

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

.submit-overlay-box h3 {
    font-size: 1.3em;
    color: var(--dark-color);
    margin-bottom: 8px;
}

.submit-overlay-box > p {
    font-size: 0.95em;
    color: #777;
    margin-bottom: 28px;
    min-height: 22px;
    transition: all 0.3s ease;
}

.submit-steps {
    display: flex;
    flex-direction: column;
    gap: 12px;
    text-align: left;
}

.submit-step {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: 8px;
    background: #f8f9fa;
    border: 1px solid #e5e5e5;
    font-size: 0.9em;
    color: #555;
    transition: all 0.35s ease;
}

.submit-step .step-icon {
    font-size: 1.1em;
    width: 22px;
    text-align: center;
    flex-shrink: 0;
}

.submit-step.active {
    background: #eaf4fe;
    border-color: var(--primary-color);
    color: var(--dark-color);
    font-weight: 600;
}

.submit-step.done {
    background: #eafaf1;
    border-color: var(--success-color);
    color: #1a7a42;
}

.submit-step.done .step-icon::after {
    content: '✓';
}

.submit-step.done .step-icon {
    font-style: normal;
}

/* Action Buttons Row */
.action-btns {
    display: flex;
    gap: 12px;
    align-items: center;
}

/* JSON Preview Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-box {
    background: white;
    border-radius: 10px;
    width: 100%;
    max-width: 700px;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid #e5e5e5;
    background: #f8f9fa;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.1em;
    color: var(--dark-color);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.2em;
    cursor: pointer;
    color: #888;
    padding: 4px 8px;
    border-radius: 4px;
    transition: var(--transition);
    line-height: 1;
}

.modal-close:hover {
    background: #eee;
    color: #333;
}

.modal-body {
    overflow-y: auto;
    flex: 1;
    padding: 0;
}

.json-viewer {
    margin: 0;
    padding: 20px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.82em;
    line-height: 1.6;
    background: #1e1e2e;
    color: #cdd6f4;
    white-space: pre;
    min-height: 100%;
}

.json-viewer .jv-key    { color: #89b4fa; }
.json-viewer .jv-str    { color: #a6e3a1; }
.json-viewer .jv-num    { color: #fab387; }
.json-viewer .jv-bool   { color: #cba6f7; }
.json-viewer .jv-null   { color: #f38ba8; }

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 14px 20px;
    border-top: 1px solid #e5e5e5;
    background: #f8f9fa;
}

.config-box {
    background: #f8f9fa;
    border-left: 4px solid var(--primary-color);
    border-radius: var(--border-radius);
    padding: 20px;
    margin-bottom: 20px;
}

.config-box h3 {
    font-size: 1.2em;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.config-group {
    margin-bottom: 15px;
}

.config-group h4 {
    font-size: 0.95em;
    color: #666;
    margin-bottom: 10px;
    font-weight: 600;
}

.checkbox-label {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
    cursor: pointer;
    user-select: none;
}

.checkbox {
    width: 18px;
    height: 18px;
    margin-right: 10px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.checkbox-label span {
    color: #333;
}

.label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
}

.input,
.textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 0.95em;
    transition: var(--transition);
}

.input:focus,
.textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

/* Status Section */
.status-card {
    background: #f8f9fa;
    border-radius: var(--border-radius);
    padding: 25px;
    border-left: 4px solid var(--success-color);
}

.status-info {
    margin-bottom: 20px;
}

.status-info p {
    margin-bottom: 10px;
    font-size: 0.95em;
}

.status-badge {
    display: inline-block;
    padding: 5px 15px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9em;
}

.status-badge.running {
    background: var(--warning-color);
    color: white;
}

.status-badge.completed {
    background: var(--success-color);
    color: white;
}

.status-badge.failed {
    background: var(--danger-color);
    color: white;
}

.progress-container {
    margin: 20px 0;
}

.progress-bar {
    width: 100%;
    height: 30px;
    background: #ddd;
    border-radius: 15px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--success-color));
    width: 0%;
    animation: progress-animation 2s infinite;
}

@keyframes progress-animation {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.progress-text {
    text-align: center;
    font-size: 0.9em;
    color: #666;
}

.result-info {
    background: white;
    padding: 15px;
    border-radius: var(--border-radius);
    margin-bottom: 15px;
}

.result-info p {
    margin-bottom: 10px;
}

.result-info ul {
    list-style: none;
    padding-left: 0;
}

.result-info li {
    padding: 5px;
    background: #f0f0f0;
    margin-bottom: 5px;
    border-radius: 4px;
    padding-left: 10px;
}

/* Messages */
#messageContainer {
    position: fixed;
    top: 20px;
    right: 20px;
    max-width: 400px;
    z-index: 1000;
}

.message {
    background: white;
    padding: 15px 20px;
    border-radius: var(--border-radius);
    margin-bottom: 10px;
    box-shadow: var(--box-shadow);
    animation: slideIn 0.3s ease;
}

.message.success {
    border-left: 4px solid var(--success-color);
}

.message.error {
    border-left: 4px solid var(--danger-color);
}

.message.info {
    border-left: 4px solid var(--primary-color);
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Responsive */
@media (max-width: 768px) {
    .main-content {
        padding: 20px;
    }

    .header h1 {
        font-size: 2em;
    }

    section h2 {
        font-size: 1.5em;
    }

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

    #messageContainer {
        max-width: calc(100% - 40px);
    }
}