/* Body Fat Calculator Styles */

:root {
    --primary-color: #2196F3;
    --secondary-color: #FF6B6B;
    --success-color: #4CAF50;
    --warning-color: #FF9800;
    --danger-color: #F44336;
    --light-bg: #F5F7FA;
    --border-color: #E0E0E0;
    --text-dark: #333;
    --text-light: #666;
}

* {
    box-sizing: border-box;
}

.bfc-container {
    max-width: 600px;
    margin: 30px auto;
    padding: 0 15px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.bfc-card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
    padding: 40px;
    animation: slideIn 0.4s ease-out;
}

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

.bfc-title {
    text-align: center;
    color: var(--text-dark);
    margin: 0 0 30px 0;
    font-size: 28px;
    font-weight: 600;
}

.bfc-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

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

.bfc-form-group label {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.bfc-form-group input[type="number"],
.bfc-form-group input[type="text"] {
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: var(--light-bg);
}

.bfc-form-group input[type="number"]:focus,
.bfc-form-group input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-color);
    background: white;
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.bfc-radio-group {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

.bfc-radio-group input[type="radio"] {
    cursor: pointer;
    margin-right: 8px;
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
}

.bfc-radio-group span {
    cursor: pointer;
    color: var(--text-dark);
    font-weight: 500;
}

.bfc-form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 480px) {
    .bfc-form-row {
        grid-template-columns: 1fr;
    }
}

.bfc-input-with-unit {
    position: relative;
    display: flex;
    align-items: center;
}

.bfc-input-with-unit input {
    width: 100%;
    padding-right: 45px;
}

.bfc-unit {
    position: absolute;
    right: 15px;
    color: var(--text-light);
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    pointer-events: none;
}

#hip-group {
    display: none;
}

#hip-group.show {
    display: flex;
}

/* Buttons */
.bfc-btn-primary,
.bfc-btn-secondary {
    padding: 14px 32px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.bfc-btn-primary {
    background: linear-gradient(135deg, var(--primary-color), #1976D2);
    color: white;
    width: 100%;
    margin-top: 20px;
}

.bfc-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(33, 150, 243, 0.3);
}

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

.bfc-btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.bfc-btn-secondary {
    background: var(--light-bg);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    width: 100%;
}

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

/* Results */
.bfc-result {
    margin-top: 30px;
    animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.bfc-result-box {
    background: linear-gradient(135deg, var(--primary-color), #1976D2);
    border-radius: 12px;
    padding: 30px;
    color: white;
    margin-bottom: 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 480px) {
    .bfc-result-box {
        grid-template-columns: 1fr;
    }
}

.bfc-result-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.bfc-label {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    opacity: 0.9;
    font-weight: 600;
}

.bfc-value {
    font-size: 36px;
    font-weight: 700;
}

.bfc-value-category {
    font-size: 20px;
    font-weight: 600;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    display: inline-block;
    width: fit-content;
}

.bfc-result-details {
    background: var(--light-bg);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
}

.bfc-detail-item {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.bfc-detail-item span {
    color: var(--text-light);
    font-weight: 500;
}

.bfc-detail-item strong {
    color: var(--primary-color);
    font-weight: 700;
}

/* Category Colors */
.category-essential { color: #FF6B6B; }
.category-athletes { color: #4CAF50; }
.category-fitness { color: #2196F3; }
.category-average { color: #FF9800; }
.category-obese { color: #F44336; }

/* Loading State */
.bfc-loading {
    opacity: 0.6;
    pointer-events: none;
}

.bfc-error {
    background: #FEE;
    color: #C33;
    padding: 15px;
    border-radius: 8px;
    margin-top: 15px;
    border-left: 4px solid #F44336;
}

/* Responsive */
@media (max-width: 600px) {
    .bfc-card {
        padding: 25px;
        margin: 15px auto;
    }

    .bfc-title {
        font-size: 24px;
    }

    .bfc-btn-primary,
    .bfc-btn-secondary {
        padding: 12px 24px;
        font-size: 14px;
    }
}