/* =============================================================================
   STUNTING PREDICTION APP — Stylesheet
   ============================================================================= */

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

:root {
    --primary: #1976D2;
    --primary-dark: #0D47A1;
    --success: #4CAF50;
    --danger: #D32F2F;
    --warning: #FF9800;
    --info: #2196F3;
    --gray-50: #FAFAFA;
    --gray-100: #F5F5F5;
    --gray-200: #EEEEEE;
    --gray-300: #E0E0E0;
    --gray-500: #9E9E9E;
    --gray-700: #424242;
    --gray-900: #212121;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--gray-100);
    color: var(--gray-900);
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* HEADER */
.app-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 30px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.app-header h1 {
    font-size: 28px;
    margin-bottom: 5px;
}

.app-header .subtitle {
    opacity: 0.9;
    font-size: 14px;
}

/* MAIN CONTENT */
main {
    padding: 30px 0;
}

/* ALERT */
.alert {
    padding: 15px 20px;
    border-radius: 8px;
    margin: 20px 0;
    font-size: 14px;
}

.alert-success {
    background-color: #E8F5E9;
    border-left: 4px solid var(--success);
    color: #1B5E20;
}

.alert-danger {
    background-color: #FFEBEE;
    border-left: 4px solid var(--danger);
    color: #B71C1C;
}

.alert details {
    margin-top: 10px;
    font-size: 13px;
}

.alert pre {
    background: rgba(0,0,0,0.05);
    padding: 10px;
    border-radius: 4px;
    margin: 5px 0;
    font-size: 12px;
}

/* FORM */
.prediction-form {
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    overflow: hidden;
}

.form-section {
    padding: 30px;
    border-bottom: 1px solid var(--gray-200);
}

.form-section:last-of-type {
    border-bottom: none;
}

.form-section h2 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--gray-900);
    display: flex;
    align-items: center;
    gap: 12px;
}

.section-num {
    background: var(--primary);
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
}

.row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

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

.form-group label {
    display: block;
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 8px;
    color: var(--gray-700);
}

.required {
    color: var(--danger);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.1);
}

.form-group small {
    display: block;
    color: var(--gray-500);
    font-size: 12px;
    margin-top: 4px;
}

.info-text {
    background: #E3F2FD;
    color: #0D47A1;
    padding: 12px 15px;
    border-radius: 6px;
    font-size: 13px;
    margin-bottom: 15px;
}

/* CHECKBOX GRID */
.checkbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 10px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 15px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 14px;
}

.checkbox-item:hover {
    border-color: var(--primary);
    background: #F3F8FE;
}

.checkbox-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary);
}

.checkbox-item input[type="checkbox"]:checked + span {
    font-weight: 600;
    color: var(--primary);
}

/* BUTTONS */
.form-actions {
    padding: 30px;
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 6px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-block;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(25, 118, 210, 0.3);
}

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
}

.btn-secondary:hover {
    background: var(--gray-300);
}

.btn-lg {
    padding: 15px 40px;
    font-size: 16px;
}

/* RESULT CARD */
.result-card {
    display: flex;
    align-items: center;
    gap: 25px;
    padding: 30px;
    border-radius: 12px;
    margin: 30px 0;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.result-success {
    background: linear-gradient(135deg, #E8F5E9 0%, #F1F8E9 100%);
    border-left: 6px solid var(--success);
}

.result-danger {
    background: linear-gradient(135deg, #FFEBEE 0%, #FCE4EC 100%);
    border-left: 6px solid var(--danger);
}

.result-icon {
    font-size: 60px;
    line-height: 1;
}

.result-content h2 {
    font-size: 28px;
    margin-bottom: 5px;
}

.result-success h2 {
    color: var(--success);
}

.result-danger h2 {
    color: var(--danger);
}

.result-subtitle {
    color: var(--gray-700);
    font-size: 15px;
}

/* METRICS GRID */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.metric-card {
    background: white;
    padding: 25px;
    border-radius: 10px;
    border: 1px solid var(--gray-200);
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.metric-label {
    font-size: 13px;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 10px;
}

.metric-value {
    font-size: 36px;
    font-weight: 700;
    color: var(--gray-900);
}

.metric-extra {
    font-size: 12px;
    color: var(--gray-500);
    margin-top: 8px;
}

.progress-bar {
    background: var(--gray-200);
    height: 10px;
    border-radius: 5px;
    overflow: hidden;
    margin-top: 15px;
}

.progress-fill {
    height: 100%;
    border-radius: 5px;
    transition: width 0.5s;
}

/* CARD */
.card {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    margin: 20px 0;
}

.card h3 {
    font-size: 18px;
    margin-bottom: 15px;
    color: var(--gray-900);
}

/* FACTORS LIST */
.factors-list {
    list-style: none;
    counter-reset: factor-counter;
}

.factor-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    border-bottom: 1px solid var(--gray-200);
    counter-increment: factor-counter;
}

.factor-item:last-child {
    border-bottom: none;
}

.factor-icon {
    font-size: 24px;
}

.factor-details {
    flex: 1;
}

.factor-direction {
    margin-left: 10px;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
}

.factor-direction.increase {
    background: #FFEBEE;
    color: var(--danger);
}

.factor-direction.decrease {
    background: #E8F5E9;
    color: var(--success);
}

.factor-meta {
    font-size: 12px;
    color: var(--gray-500);
    margin-top: 5px;
}

.factor-meta code {
    background: var(--gray-100);
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 11px;
}

/* RECOMMENDATIONS */
.recommendation-list {
    list-style: none;
}

.recommendation-list li {
    padding: 12px 15px;
    margin: 8px 0;
    background: var(--gray-50);
    border-left: 3px solid var(--primary);
    border-radius: 4px;
    font-size: 14px;
}

/* SUMMARY TABLE */
.summary-table {
    width: 100%;
    border-collapse: collapse;
}

.summary-table tr {
    border-bottom: 1px solid var(--gray-200);
}

.summary-table td {
    padding: 12px 0;
}

.summary-table td:first-child {
    color: var(--gray-500);
    font-weight: 600;
    width: 50%;
}

/* DISCLAIMER */
.disclaimer {
    background: #FFF8E1;
    border-left: 4px solid var(--warning);
    padding: 15px 20px;
    border-radius: 6px;
    margin: 30px 0;
    font-size: 13px;
    color: var(--gray-700);
}

/* FOOTER */
.app-footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: 25px 0;
    text-align: center;
    font-size: 13px;
    margin-top: 50px;
}

/* RESPONSIVE */
@media (max-width: 600px) {
    .app-header h1 {
        font-size: 22px;
    }
    
    .form-section {
        padding: 20px;
    }
    
    .row {
        grid-template-columns: 1fr;
    }
    
    .result-card {
        flex-direction: column;
        text-align: center;
    }
    
    .result-icon {
        font-size: 48px;
    }
}

/* PRINT */
@media print {
    .app-header, .app-footer, .form-actions, .disclaimer {
        display: none;
    }
    
    body {
        background: white;
    }
}