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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 450px;
}

.login-box {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: fadeIn 0.5s ease-in;
}

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

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

.header h1 {
    font-size: 28px;
    font-weight: 700;
    color: #667eea;
    margin-bottom: 8px;
}

.subtitle {
    font-size: 16px;
    color: #666;
    font-weight: 400;
}

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

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

.form-group label {
    font-size: 14px;
    font-weight: 600;
    color: #333;
}

.form-group input {
    padding: 14px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 15px;
    transition: all 0.3s ease;
    outline: none;
}

.form-group input:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group select {
    width: 100%;
    padding: 14px 40px 14px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.3s ease;
    outline: none;
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 14 14'%3E%3Cpath fill='%23667eea' d='M7 10L2 5h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.form-group select:hover {
    border-color: #667eea;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
}

.form-group select:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.15), 0 4px 12px rgba(102, 126, 234, 0.2);
    background: linear-gradient(135deg, #ffffff 0%, #f0f4ff 100%);
}

.form-group select option {
    padding: 12px 16px;
    background: white;
    color: #333;
    font-weight: 500;
}

.form-group select option:hover {
    background: #667eea;
    color: white;
}

.form-group input::placeholder {
    color: #aaa;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
}

.checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: #666;
}

.checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: #667eea;
}

.forgot-link {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.forgot-link:hover {
    color: #764ba2;
}

.link {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.link:hover {
    text-decoration: underline;
}

.btn-primary {
    padding: 14px 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

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

.divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 25px 0;
    color: #999;
    font-size: 14px;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: #e0e0e0;
}

.divider span {
    padding: 0 15px;
}

.social-login {
    display: flex;
    gap: 15px;
}

.social-btn {
    flex: 1;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    background: white;
    font-size: 14px;
    font-weight: 600;
    color: #333;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.social-btn:hover {
    border-color: #667eea;
    background: #f8f9ff;
}

.social-btn.google {
    color: #ea4335;
}

.social-btn.github {
    color: #333;
}

.signup-link {
    text-align: center;
    margin-top: 25px;
    font-size: 14px;
    color: #666;
}

.signup-link a {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.signup-link a:hover {
    color: #764ba2;
}

.register-box {
    max-width: 500px;
}

@media (max-width: 480px) {
    .login-box {
        padding: 30px 20px;
    }
    
    .header h1 {
        font-size: 24px;
    }
    
    .social-login {
        flex-direction: column;
    }
    
    .register-box {
        padding: 30px 20px;
    }
}