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

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Segoe UI', Toto, 'Malgun Gothic', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-color);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
}



.converter-section {
    margin-bottom: 32px;
}

.converter-toggle {
    width: 100%;
    padding: 16px 24px;
    background-color: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.converter-toggle:hover {
    border-color: var(--primary-color);
    background-color: #f1f5f9;
}

#converter-arrow {
    transition: transform 0.3s ease;
    font-size: 0.9rem;
}

#converter-arrow.rotate {
    transform: rotate(180deg);
}

.converter-widget {
    background-color: var(--card-bg);
    border: 2px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 12px 12px;
    padding: 24px;
    margin-top: -12px;
}

.converter-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.converter-tab {
    padding: 10px 20px;
    background-color: #f1f5f9;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.converter-tab.active {
    background-color: var(--primary-color);
    color: white;
}

.converter-tab:hover:not(.active) {
    background-color: #e2e8f0;
}

.converter-content {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.converter-row {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.converter-input-group {
    flex: 1;
    min-width: 250px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.converter-input-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.converter-input-group input,
.converter-input-group select {
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

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

.converter-equals {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-secondary);
    padding-top: 24px;
}

.btn-convert {
    padding: 12px 24px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    align-self: flex-start;
}

.btn-convert:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.calculator-section {
    background-color: var(--card-bg);
    border-radius: 16px;
    padding: 32px;
    box-shadow: var(--shadow-lg);
    margin-bottom: 32px;
}

.unit-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 32px;
    border-bottom: 2px solid var(--border-color);
}

.tab-btn {
    padding: 14px 28px;
    background-color: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: -2px;
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-btn:hover:not(.active) {
    color: var(--text-primary);
    background-color: #f8fafc;
}

.calculator-form {
    margin-bottom: 32px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-bottom: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    position: relative;
}

.form-group label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input[type="number"] {
    padding: 14px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

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

.unit-label {
    position: absolute;
    right: 16px;
    bottom: 16px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
    pointer-events: none;
}

.multi-input {
    display: grid;
    grid-template-columns: 1fr auto 1fr auto;
    gap: 8px;
    align-items: center;
    position: relative;
}

.multi-input input {
    padding: 14px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
}

.multi-input .unit-label {
    position: static;
    font-size: 0.85rem;
}

.gender-buttons {
    display: flex;
    gap: 12px;
}

.radio-label {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 14px 24px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.radio-label:hover {
    border-color: var(--primary-color);
    background-color: #f8fafc;
}

.radio-label input[type="radio"] {
    display: none;
}

.radio-label input[type="radio"]:checked + span {
    color: white;
}

.radio-label:has(input[type="radio"]:checked) {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.button-group {
    display: flex;
    gap: 16px;
    margin-top: 32px;
    flex-wrap: wrap;
}

.btn {
    padding: 14px 32px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    flex: 1;
    min-width: 150px;
}

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

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

.btn-secondary {
    background-color: #e2e8f0;
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: #cbd5e1;
    transform: translateY(-2px);
}

.results-section {
    margin-top: 40px;
    padding-top: 32px;
    border-top: 2px solid var(--border-color);
}

.results-section h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.result-main {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.bmi-value {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 24px 40px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 16px;
    color: white;
    box-shadow: var(--shadow-lg);
}

.bmi-value .label {
    font-size: 1rem;
    font-weight: 600;
    opacity: 0.9;
    margin-bottom: 8px;
}

.bmi-value .number {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1;
}

.bmi-category {
    padding: 16px 32px;
    border-radius: 12px;
    background-color: #f1f5f9;
}

.category-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.bmi-gauge {
    margin-bottom: 32px;
}

.gauge-bar {
    position: relative;
    height: 40px;
    display: flex;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    margin-bottom: 12px;
}

.gauge-section {
    flex: 1;
    transition: all 0.3s ease;
}

.gauge-section.underweight {
    background-color: #3b82f6;
}

.gauge-section.normal {
    background-color: #10b981;
}

.gauge-section.overweight {
    background-color: #f59e0b;
}

.gauge-section.obese {
    background-color: #ef4444;
}

.gauge-indicator {
    position: absolute;
    width: 4px;
    height: 48px;
    background-color: #1e293b;
    top: -4px;
    transform: translateX(-50%);
    border-radius: 2px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    transition: left 0.5s ease;
}

.gauge-indicator::after {
    content: '▼';
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    color: #1e293b;
    font-size: 1rem;
}

.gauge-labels {
    display: flex;
    justify-content: space-around;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.result-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.detail-item {
    padding: 16px;
    background-color: #f8fafc;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.detail-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.detail-value {
    display: block;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.action-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn-action {
    padding: 12px 24px;
    background-color: white;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-action:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.info-section {
    background-color: var(--card-bg);
    border-radius: 16px;
    padding: 32px;
    box-shadow: var(--shadow-md);
    margin-bottom: 32px;
}

.info-section h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.info-section h3 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-top: 32px;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.info-section h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-top: 24px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.info-content p {
    margin-bottom: 16px;
    line-height: 1.8;
    color: var(--text-primary);
}

.info-content ul {
    margin-left: 24px;
    margin-bottom: 16px;
}

.info-content li {
    margin-bottom: 12px;
    line-height: 1.8;
    color: var(--text-primary);
}

.bmi-table {
    margin: 24px 0;
}

.bmi-table table {
    width: 100%;
    border-collapse: collapse;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.bmi-table thead {
    background-color: var(--primary-color);
    color: white;
}

.bmi-table th,
.bmi-table td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.bmi-table tbody tr:hover {
    background-color: #f8fafc;
}

.bmi-table tbody tr:last-child td {
    border-bottom: none;
}

footer {
    text-align: center;
    padding: 24px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 40px;
}

@media (max-width: 768px) {
    .container {
        padding: 16px;
    }

    header h1 {
        font-size: 2rem;
    }

    header .subtitle {
        font-size: 1rem;
    }

    .calculator-section {
        padding: 24px 16px;
    }

    .unit-tabs {
        overflow-x: auto;
        flex-wrap: nowrap;
        scrollbar-width: thin;
    }

    .tab-btn {
        padding: 12px 20px;
        font-size: 0.9rem;
        white-space: nowrap;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .button-group {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .result-main {
        flex-direction: column;
        gap: 16px;
    }

    .bmi-value .number {
        font-size: 2.5rem;
    }

    .gauge-labels {
        font-size: 0.75rem;
    }

    .result-details {
        grid-template-columns: 1fr;
    }

    .converter-row {
        flex-direction: column;
    }

    .converter-equals {
        padding-top: 0;
        transform: rotate(90deg);
    }

    .info-section {
        padding: 24px 16px;
    }

    .bmi-table {
        overflow-x: auto;
    }
}

@media print {
    .converter-section,
    .unit-tabs,
    .calculator-form,
    .action-buttons,
    footer {
        display: none;
    }

    .results-section {
        border-top: none;
    }

    body {
        background-color: white;
    }

    .calculator-section,
    .info-section {
        box-shadow: none;
        border: 1px solid var(--border-color);
    }
}


body.add-color-body {
    background-color: #EEEEEE !important;
}