/* ===== متغیرها و استایل‌های پایه ===== */
:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --text-color: #333;
    --light-bg: #f5f7fa;
    --white: #ffffff;
    --shadow: 0 5px 15px rgba(0,0,0,0.1);
}

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

body {
    font-family: 'Vazirmatn', Tahoma, sans-serif;
    background-color: var(--light-bg);
    margin: 0;
    padding: 0;
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== استایل‌های base ===== */
.main-content {
    flex: 1;
    padding: 0 2rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.error {
    background: var(--white);
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    box-shadow: var(--shadow);
    margin: 2rem 0;
}

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

/* ===== استایل‌های header ===== */
.header {
    background: var(--white);
    padding: 1rem 2rem;
    box-shadow: var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.logo a {
    text-decoration: none;
    color: inherit;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo img {
    height: 40px;
    width: auto;
}

.ad-banner {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    text-align: center;
    max-width: 728px;
    flex-grow: 1;
    margin: 0 1rem;
}

/* ===== استایل‌های home ===== */
.home-title {
    color: #2c3e50;
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2rem;
}

.main-content-home {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 3rem;
}

.cards-container {
    flex: 2;
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    min-width: 300px;
}

.card {
    background: var(--white);
    border-radius: 12px;
    padding: 2.5rem 2rem;
    flex: 1;
    min-width: 250px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-decoration: none;
    color: inherit;
    display: block;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

.card-study {
    border-top: 5px solid #ff9800;
}

.card-health {
    border-top: 5px solid var(--secondary-color);
}

/* ===== استایل‌های footer ===== */
.footer {
    background: #2c3e50;
    color: white;
    margin-top: 3rem;
}

.footer-main {
    padding: 3rem 2rem;
}

.footer-main .container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

/* بقیه استایل‌های فوتر... */

/* ===== رسپانسیو ===== */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .main-content-home {
        flex-direction: column;
    }
    
    .card {
        min-width: 100%;
    }
}
---------------------------------
/*base */
    
        :root {
            --primary-color: #3498db;
            --secondary-color: #2ecc71;
            --text-color: #333;
            --light-bg: #f5f7fa;
            --white: #ffffff;
            --shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        body {
            font-family: 'Vazirmatn', Tahoma, sans-serif;
            background-color: var(--light-bg);
            margin: 0;
            padding: 0;
            color: var(--text-color);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        
        .main-content {
            flex: 1;
            padding: 0 2rem;
            max-width: 1200px;
            margin: 0 auto;
            width: 100%;
        }
        
        .error {
            background: var(--white);
            padding: 2rem;
            border-radius: 8px;
            text-align: center;
            box-shadow: var(--shadow);
            margin: 2rem 0;
        }
.form-group {
            margin-bottom: 20px;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--dark);
        }
        
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        
        .form-group textarea {
            min-height: 150px;
        }
        
        .form-group input:focus,
        .form-group textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.2);
            outline: none;
        }