body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', sans-serif;
    background: radial-gradient(circle at center, #002b40, #000);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.login-container {
    background-color: #111;
    padding: 35px 30px;
    border-radius: 14px;
    width: 340px;
    box-shadow: 0 0 40px rgba(0, 255, 255, 0.3);
    animation: fadeIn 0.7s ease;
    text-align: center;
}

.login-container h2 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #fff;
}

.login-container input {
    width: 100%;
    padding: 12px;
    margin-bottom: 16px;
    border: 1px solid #00bcd4;
    border-radius: 6px;
    background-color: #000;
    color: #fff;
    font-size: 16px;
    transition: all 0.3s ease;
}

.login-container input:focus {
    border-color: #29b6f6;
    outline: none;
    box-shadow: 0 0 5px #29b6f6;
}

.login-container button {
    width: 100%;
    padding: 12px;
    background-color: #e53935;
    border: none;
    color: white;
    font-weight: bold;
    font-size: 16px;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.3s ease;
}

.login-container button:hover {
    background-color: #c62828;
}

.error {
    color: #ff4444;
    margin-top: 15px;
    font-weight: bold;
    text-align: center;
}

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