:root { 
    --primary-color: #27ae60; 
    --primary-hover: #219150; 
    --dark-color: #2c3e50; 
    --light-bg: #e8f5e9; 
    --text-color: #333; 
    --error-color: #e74c3c; 
} 

body { 
    font-family: 'Roboto', sans-serif; 
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%); 
    margin: 0; 
    display: flex; 
    justify-content: center; 
    align-items: center; 
    min-height: 100vh; 
} 

.auth-container { 
    background: white; 
    width: 100%; 
    max-width: 420px; 
    padding: 40px; 
    border-radius: 20px; 
    box-shadow: 0 15px 35px rgba(0,0,0,0.15); 
} 

.logo-center { 
    text-align: center; 
    margin-bottom: 30px; 
} 

.logo-center .logo { 
    font-size: 30px; 
    font-weight: bold; 
    color: var(--primary-color); 
    text-decoration: none; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    gap: 10px; 
} 

.logo-center nav {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 15px;
}

.logo-center nav a {
    font-size: 14px;
    color: #7f8c8d;
    text-decoration: none;
    transition: 0.3s;
    display: inline-block;
}

.logo-center nav a:hover {
    color: var(--primary-color);
} 

.tabs { 
    display: flex; 
    margin-bottom: 30px; 
    border-bottom: 2px solid #eee; 
} 

.tab { 
    flex: 1; 
    text-align: center; 
    padding: 12px; 
    cursor: pointer; 
    font-weight: bold; 
    color: #888; 
    transition: 0.3s; 
} 

.tab.active { 
    color: var(--primary-color); 
    border-bottom: 2px solid var(--primary-color); 
} 

.form-group { 
    margin-bottom: 18px; 
    position: relative; 
} 

.form-group i.input-icon { 
    position: absolute; 
    left: 15px; 
    top: 50%; 
    transform: translateY(-50%); 
    color: #aaa; 
} 

.form-group input { 
    width: 100%; 
    padding: 14px 45px 14px 45px; 
    border: 1px solid #ddd; 
    border-radius: 10px; 
    font-size: 15px; 
    box-sizing: border-box; 
    outline: none; 
    transition: 0.3s; 
} 

.form-group input:focus { 
    border-color: var(--primary-color); 
    box-shadow: 0 0 8px rgba(39, 174, 96, 0.2); 
} 

.toggle-password { 
    position: absolute; 
    right: 15px; 
    top: 50%; 
    transform: translateY(-50%); 
    cursor: pointer; 
    color: #aaa; 
} 

.btn-auth { 
    width: 100%; 
    padding: 14px; 
    background: var(--primary-color); 
    color: white; 
    border: none; 
    border-radius: 10px; 
    font-size: 16px; 
    font-weight: bold; 
    cursor: pointer; 
    transition: 0.3s; 
    margin-top: 10px; 
} 

.btn-auth:hover { 
    background: var(--primary-hover); 
    transform: translateY(-2px); 
} 

/* Social Login */ 
.social-login { 
    margin-top: 25px; 
    text-align: center; 
} 

.social-login p { 
    font-size: 13px; 
    color: #888; 
    position: relative; 
} 

.social-login p::before, .social-login p::after { 
    content: ""; 
    width: 25%; 
    height: 1px; 
    background: #eee; 
    position: absolute; 
    top: 50%; 
} 
.social-login p::before { left: 0; } 
.social-login p::after { right: 0; } 

.social-icons { 
    display: flex; 
    justify-content: center; 
    margin-top: 15px; 
} 

.social-icons a { 
    width: 45px; 
    height: 45px; 
    border-radius: 50%; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    text-decoration: none; 
    color: white; 
    font-size: 18px; 
    transition: 0.3s; 
} 

.google { background: #db4437; } 

.social-icons a:hover { opacity: 0.8; transform: scale(1.1); } 

.hidden { display: none; } 
 
.back-home { 
    display: block; 
    text-align: center; 
    margin-top: 20px; 
    text-decoration: none; 
    color: #7f8c8d; 
    font-size: 14px; 
} 

.error-message { 
    color: var(--error-color); 
    font-size: 12px; 
    margin-top: 5px; 
    display: block; 
    background: #fdf2f2; 
    padding: 10px; 
    border-radius: 6px; 
    border: 1px solid #f9d6d6; 
}