body {
    background-color: #000000;
    color: #ffffff;
    font-family: 'Arial', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}

.login-container {
    background-color: #1a1a1a;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.1);
    width: 100%;
    max-width: 400px;
}

#login-title {
    color: #ffffff;
    text-align: center;
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    font-weight: bold;
    text-transform: uppercase;
}

#login-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group {
    position: relative;
    margin-bottom: 1rem;
}

label {
    color: #ffffff;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    display: block;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ffffff;
    border-radius: 4px;
    background-color: #2a2a2a;
    color: #ffffff;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

input[type="text"]:focus,
input[type="password"]:focus {
    outline: none;
    border-color: #ff0000;
    box-shadow: 0 0 8px rgba(255, 0, 0, 0.5);
}

input:invalid:not(:placeholder-shown) {
    border-color: #ff0000;
    animation: shake 0.3s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.password-group {
    position: relative;
}

.toggle-password {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-25%);
    background: none;
    border: none;
    color: #ffffff;
    cursor: pointer;
    font-size: 1rem;
    transition: color 0.3s ease;
}

.toggle-password:hover {
    color: #ff0000;
}

.error {
    color: #ff0000;
    font-size: 0.8rem;
    min-height: 1.2rem;
    display: block;
    margin-top: 0.3rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

input:invalid:not(:placeholder-shown) + .error {
    opacity: 1;
}

.error-container {
    min-height: 1.5rem;
    text-align: center;
}

.error-container p {
    color: #ff0000;
    font-size: 0.9rem;
    margin: 0;
    opacity: 0;
    animation: fadeIn 0.3s ease forwards;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.btn {
    background-color: #ff0000;
    color: #ffffff;
    padding: 0.8rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.btn:hover {
    background-color: #cc0000;
    transform: translateY(-2px);
}

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

.forgot-password {
    color: #ffffff;
    text-align: center;
    display: block;
    margin-top: 1rem;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.forgot-password:hover {
    color: #ff0000;
    text-decoration: underline;
}