@import url('https://fonts.googleapis.com/css2?family=Vazirmatn:wght@300;400;500;600;700&display=swap');

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

body {
    font-family: 'Vazirmatn', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    direction: rtl;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

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

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.header p {
    font-size: 1.1rem;
    opacity: 0.95;
    font-weight: 400;
}

.page {
    display: none;
}

.page.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

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

.card {
    background: white;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    margin-bottom: 20px;
}

.input-group {
    margin-bottom: 25px;
}

.input-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: #333;
    font-size: 1rem;
}

.input-group input,
.input-group select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 1rem;
    font-family: 'Vazirmatn', sans-serif;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: #667eea;
    background: white;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.btn-primary,
.btn-secondary {
    width: 100%;
    padding: 15px;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    font-family: 'Vazirmatn', sans-serif;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    margin-bottom: 10px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: white;
    color: #667eea;
    border: 2px solid #667eea;
}

.btn-secondary:hover {
    background: #f8f9fa;
    transform: translateY(-2px);
}

.error {
    background: #fee;
    color: #c33;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-weight: 500;
    display: none;
}

.error:not(:empty) {
    display: block;
}

/* اطلاعات کلی */
.info-card h3 {
    color: #667eea;
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.info-grid div {
    padding: 12px;
    background: #f8f9fa;
    border-radius: 10px;
    font-size: 1rem;
}

.info-grid strong {
    color: #555;
    margin-left: 8px;
}

/* کارت BMI با نمایش وضعیت */
.bmi-card h3 {
    color: #667eea;
    margin-bottom: 20px;
    font-size: 1.3rem;
    text-align: center;
}

.bmi-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.bmi-circle {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
    transition: all 0.3s ease;
}

.bmi-details {
    display: flex;
    flex-direction: column;
    gap: 15px;
    flex: 1;
    min-width: 250px;
}

.bmi-status,
.bmi-difference {
    padding: 15px;
    background: #f8f9fa;
    border-radius: 10px;
    font-size: 1.1rem;
}

.bmi-status strong,
.bmi-difference strong {
    color: #555;
    margin-left: 8px;
}

.bmi-status span {
    font-weight: 600;
    font-size: 1.2rem;
}

.bmi-difference span {
    font-weight: 600;
    color: #667eea;
}

/* کارت‌های نتیجه */
.result-card {
    text-align: center;
}

.result-card h3 {
    color: #667eea;
    margin-bottom: 8px;
    font-size: 1.3rem;
}

.result-label {
    color: #888;
    font-size: 0.95rem;
    margin-bottom: 15px;
}

.result-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: #333;
}

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

/* توصیه‌های کالری */
.calorie-recommendations {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.calorie-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.calorie-item:hover {
    background: #e9ecef;
    transform: translateX(-5px);
}

.calorie-label {
    font-weight: 500;
    color: #555;
    font-size: 1rem;
}

.calorie-value {
    font-weight: 700;
    color: #667eea;
    font-size: 1.2rem;
}

/* راهنما */
#guide-page .card h3 {
    color: #667eea;
    margin: 25px 0 15px 0;
    font-size: 1.3rem;
}

#guide-page .card h3:first-child {
    margin-top: 0;
}

#guide-page .card p {
    line-height: 1.8;
    color: #555;
    margin-bottom: 10px;
}

#guide-page .card ul {
    margin: 15px 0 15px 20px;
    line-height: 1.8;
}

#guide-page .card ul li {
    margin-bottom: 8px;
    color: #555;
}

#guide-page .card ul li strong {
    color: #333;
}

/* Responsive */
@media (max-width: 600px) {
    .header h1 {
        font-size: 1.8rem;
    }

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

    .card {
        padding: 20px;
    }

    .bmi-circle {
        width: 120px;
        height: 120px;
        font-size: 2rem;
    }

    .result-value {
        font-size: 1.5rem;
    }

    .calorie-item {
        flex-direction: column;
        gap: 10px;
        align-items: flex-start;
    }

    .info-grid {
        grid-template-columns: 1fr;
    }
}
.footer-credit {
    margin-top: 30px;
    padding: 20px;
    text-align: center;
    font-size: 14px;
    color: #FF9800; /* نارنجی خوش‌رنگ */
    line-height: 1.8;
    font-weight: 500;
}

.footer-credit a {
    color: #FF9800; /* نارنجی خوش‌رنگ */
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
}

.footer-credit a:hover {
    color: #FFB74D; /* نارنجی روشن‌تر هنگام hover */
    text-decoration: underline;
}