* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;

    font-family: Tahoma, Arial, sans-serif;

    background:
        radial-gradient(circle at top right, #18283a, transparent 45%),
        radial-gradient(circle at bottom left, #101c2b, transparent 45%),
        #070b10;

    color: #ffffff;

    display: flex;
    align-items: center;
    justify-content: center;

    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 430px;
}

.login-card {
    background: rgba(15, 23, 33, 0.96);

    border: 1px solid #263646;

    border-radius: 18px;

    padding: 40px 35px;

    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.45);

    text-align: center;
}

.login-icon {
    width: 75px;
    height: 75px;

    margin: 0 auto 20px;

    border-radius: 20px;

    background: #162538;

    display: flex;
    align-items: center;
    justify-content: center;

    font-size: 36px;

    border: 1px solid #29415b;
}

.login-card h1 {
    margin: 0;

    font-size: 23px;
}

.subtitle {
    color: #8fa3b8;

    margin: 10px 0 30px;

    font-size: 14px;
}

.input-group {
    text-align: right;

    margin-bottom: 20px;
}

.input-group label {
    display: block;

    margin-bottom: 8px;

    color: #b9c7d5;

    font-size: 14px;
}

.input-group input {
    width: 100%;

    height: 50px;

    padding: 0 15px;

    border-radius: 10px;

    border: 1px solid #304255;

    background: #0b121b;

    color: #ffffff;

    font-size: 15px;

    outline: none;
}

.input-group input:focus {
    border-color: #2d8cff;

    box-shadow:
        0 0 0 3px rgba(45, 140, 255, 0.12);
}

button {
    width: 100%;

    height: 52px;

    margin-top: 10px;

    border: none;

    border-radius: 10px;

    background: #2d8cff;

    color: #ffffff;

    font-size: 16px;

    font-weight: bold;

    cursor: pointer;

    transition: 0.2s;
}

button:hover {
    background: #1f78e0;

    transform: translateY(-1px);
}

.error {
    background: rgba(220, 53, 69, 0.12);

    border: 1px solid rgba(220, 53, 69, 0.35);

    color: #ff7b87;

    padding: 12px;

    border-radius: 9px;

    margin-bottom: 20px;

    font-size: 14px;
}

@media (max-width: 500px) {

    .login-card {
        padding: 30px 22px;
    }

    .login-card h1 {
        font-size: 20px;
    }
}