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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: url('../Assets/Images/residence-background-photo.jpg') center/cover no-repeat fixed;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
}

body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 0;
}

.login-container {
    background: white;
    border-radius: 8px;
    max-width: 480px;
    width: 100%;
    max-height: 95vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 1;
    padding: 30px 40px 35px;
}

.login-header {
    text-align: center;
    margin-bottom: 35px;
}

.login-header h1 {
    color: #333;
    font-size: 28px;
    margin-bottom: 8px;
}

.login-header p {
    color: #666;
    font-size: 14px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 500;
    font-size: 14px;
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 15px;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #5DBDBD;
}

.btn-login {
    width: 100%;
    padding: 14px;
    background: #5DBDBD;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.3s;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-login:hover {
    background: #4DADAD;
}

.btn-login:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.error-message {
    background: #f44336;
    color: white;
    padding: 12px 15px;
    border-radius: 4px;
    margin-bottom: 20px;
    font-size: 14px;
    display: none;
    animation: shake 0.3s;
}

.error-message.show {
    display: block;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

.back-link {
    text-align: center;
    margin-top: 25px;
}

.back-link a {
    color: #5DBDBD;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
}

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