/* CalcTechLab BMI Calculator Styles */
/* Theme colors matching www.calctechlab.com */

:root {
    /* CalcTechLab Brand Colors */
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #06b6d4;
    
    /* NHS-inspired health colors */
    --nhs-blue: #005EB8;
    --nhs-green: #007F3B;
    --nhs-orange: #ED8B00;
    --nhs-red: #DA291C;
    
    /* Neutral colors */
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

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

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

/* Header Styles */
.calculator-header {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px 20px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

.calculator-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.calculator-header p {
    font-size: 1.1rem;
    opacity: 0.95;
    max-width: 800px;
    margin: 0 auto;
}

/* Card Styles */
.calculator-card {
    background: var(--bg-white);
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

/* Form Styles */
.form-group {
    margin-bottom: 25px;
}

.form-label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: var(--bg-white);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    background-color: var(--bg-white);
    cursor: pointer;
    transition: all 0.3s ease;
}

.form-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Unit Toggle */
.unit-toggle {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.unit-btn {
    flex: 1;
    padding: 12px 20px;
    border: 2px solid var(--border-color);
    background: var(--bg-white);
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.unit-btn:hover {
    border-color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.05);
}

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

/* Imperial Input Grid */
.imperial-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

/* Button Styles */
.btn {
    padding: 14px 32px;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    box-shadow: var(--shadow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background-color: var(--bg-light);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--bg-white);
    border-color: var(--primary-color);
}

.btn-block {
    width: 100%;
}

/* Results Section */
.results-section {
    display: none;
    animation: fadeIn 0.5s ease;
}

.results-section.show {
    display: block;
}

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

.bmi-result-card {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 40px;
    border-radius: 12px;
    text-align: center;
    margin-bottom: 30px;
    box-shadow: var(--shadow-lg);
}

.bmi-value {
    font-size: 4rem;
    font-weight: 700;
    margin: 20px 0;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.bmi-category {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 10px;
    text-transform: capitalize;
}

.bmi-range {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Advice Card */
.advice-card {
    padding: 30px;
    border-radius: 12px;
    margin-bottom: 30px;
    border-left: 5px solid;
}

.advice-card.underweight {
    background-color: rgba(6, 182, 212, 0.1);
    border-color: var(--info-color);
}

.advice-card.healthy {
    background-color: rgba(16, 185, 129, 0.1);
    border-color: var(--success-color);
}

.advice-card.overweight {
    background-color: rgba(245, 158, 11, 0.1);
    border-color: var(--warning-color);
}

.advice-card.obese {
    background-color: rgba(239, 68, 68, 0.1);
    border-color: var(--danger-color);
}

.advice-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.advice-description {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 15px;
}

.advice-action {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-color);
    padding: 15px;
    background-color: rgba(37, 99, 235, 0.05);
    border-radius: 8px;
    margin-top: 15px;
}

.ethnic-note {
    margin-top: 20px;
    padding: 15px;
    background-color: rgba(37, 99, 235, 0.05);
    border-radius: 8px;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* Chart Container */
.chart-container {
    position: relative;
    height: 300px;
    margin: 30px 0;
}

/* Info Box */
.info-box {
    background-color: rgba(37, 99, 235, 0.05);
    border-left: 4px solid var(--primary-color);
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
}

.info-box h3 {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.info-box p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* Warning Box */
.warning-box {
    background-color: rgba(245, 158, 11, 0.1);
    border-left: 4px solid var(--warning-color);
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
}

.warning-box h3 {
    color: var(--warning-color);
    font-size: 1.2rem;
    margin-bottom: 10px;
}

/* Loading Spinner */
.loading {
    display: none;
    text-align: center;
    padding: 20px;
}

.loading.show {
    display: block;
}

.spinner {
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Error Message */
.error-message {
    background-color: rgba(239, 68, 68, 0.1);
    border-left: 4px solid var(--danger-color);
    color: var(--danger-color);
    padding: 15px 20px;
    border-radius: 8px;
    margin: 20px 0;
    display: none;
}

.error-message.show {
    display: block;
}

/* Responsive Design */
@media (max-width: 768px) {
    .calculator-header h1 {
        font-size: 2rem;
    }
    
    .calculator-header p {
        font-size: 1rem;
    }
    
    .calculator-card {
        padding: 20px;
    }
    
    .imperial-grid {
        grid-template-columns: 1fr;
    }
    
    .bmi-value {
        font-size: 3rem;
    }
    
    .bmi-category {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
    }
    
    .calculator-header {
        padding: 20px 15px;
    }
    
    .calculator-header h1 {
        font-size: 1.5rem;
    }
    
    .unit-toggle {
        flex-direction: column;
    }
    
    .bmi-value {
        font-size: 2.5rem;
    }
}

/* Embedded Mode Styles */
body.embedded {
    background-color: transparent;
}

body.embedded .calculator-header {
    margin-bottom: 20px;
}

body.embedded .container {
    padding: 10px;
}