:root {
    --primary-color: #4361ee;
    --secondary-color: #3a0ca3;
    --accent-color: #f72585;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --gray-color: #6c757d;
    --success-color: #4cc9f0;
    --warning-color: #fca311;
    --danger-color: #e63946;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    padding: 20px;
}

.login-container {
    background-color: white;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 450px;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.login-container:hover {
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
    transform: translateY(-5px);
}

.login-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.login-header {
    text-align: center;
    margin-bottom: 40px;
}

.login-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.login-icon i {
    font-size: 32px;
    color: white;
}

.login-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--dark-color);
    margin: 0;
    letter-spacing: 0.5px;
}

.login-subtitle {
    font-size: 0.9rem;
    color: var(--gray-color);
    margin-top: 5px;
}

.form-group {
    margin-bottom: 25px;
    position: relative;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--dark-color);
    margin-bottom: 8px;
}

.form-group .input-wrapper {
    position: relative;
}

.form-group input {
    width: 100%;
    padding: 12px 15px 12px 45px;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: #f9f9f9;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
    background-color: white;
}

.form-group .input-icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-color);
    font-size: 1rem;
    transition: color 0.3s ease;
}

.form-group input:focus + .input-icon {
    color: var(--primary-color);
}

.btn-login {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 20px;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(67, 97, 238, 0.4);
}

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

.error-message {
    background-color: rgba(230, 57, 70, 0.1);
    border-left: 4px solid var(--danger-color);
    color: var(--danger-color);
    padding: 12px 15px;
    border-radius: 0 8px 8px 0;
    margin-bottom: 20px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.error-message i {
    font-size: 1.2rem;
}

.login-footer {
    text-align: center;
    margin-top: 30px;
    font-size: 0.85rem;
    color: var(--gray-color);
}

@media (max-width: 576px) {
    .login-container {
        padding: 30px 25px;
    }
    
    .login-title {
        font-size: 1.3rem;
    }
}