* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    width: 100%;
    min-height: 100vh;
}

body {
    font-family: Arial, sans-serif;
    background: #111827;
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.login-card {
    width: 100%;
    max-width: 380px;
    background: #1f2937;
    border-radius: 10px;
    padding: 28px 30px;
}

.login-card h1 {
    color: #ffffff;
    margin: 0 0 20px;
    font-size: 26px;
    font-weight: 800;
}

.login-card form {
    width: 100%;
}

.login-card input,
.login-card button {
    display: block;
    width: 100%;
    height: 44px;
    margin: 0 0 12px;
    border-radius: 5px;
    font-size: 14px;
}

.login-card input {
    padding: 0 12px;
    border: 0;
    background: #ffffff;
    color: #111827;
}

.login-card button {
    border: 0;
    background: #2563eb;
    color: #ffffff;
    font-weight: 800;
    cursor: pointer;
}

.login-card button:hover {
    background: #1d4ed8;
}

.error {
    color: #fecaca;
    background: rgba(220, 38, 38, 0.15);
    border: 1px solid rgba(248, 113, 113, 0.35);
    padding: 10px;
    border-radius: 6px;
    margin-bottom: 12px;
}

@media screen and (max-width: 600px) {
    body {
        align-items: flex-start;
        padding-top: 80px;
    }

    .login-card {
        max-width: 100%;
        padding: 24px 20px;
    }

    .login-card h1 {
        font-size: 24px;
    }

    .login-card input,
    .login-card button {
        height: 46px;
        font-size: 16px;
    }
}