* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;

    font-family: Arial, sans-serif;
    background:
        radial-gradient(circle at top, #173d62 0%, #0b2239 45%, #071725 100%);
    color: white;
}

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

    padding: 42px 38px;

    background: rgba(10, 32, 52, 0.96);
    border: 1px solid rgba(255, 255, 255, 0.10);
    border-radius: 20px;

    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.40);
}

.logo {
    text-align: center;
    font-size: 34px;
    font-weight: 800;
    letter-spacing: 0.5px;
}

.subtitle {
    text-align: center;
    margin-top: 8px;
    margin-bottom: 36px;

    color: #aab9c7;
    font-size: 15px;
}

label {
    display: block;
    margin: 18px 0 8px;

    color: #dce6ee;
    font-size: 14px;
    font-weight: 600;
}

input {
    width: 100%;
    height: 54px;

    padding: 0 16px;

    border: 1px solid #35536d;
    border-radius: 10px;

    background: #071b2c;
    color: white;

    font-size: 17px;
    outline: none;
}

input:focus {
    border-color: #d7ae58;
    box-shadow: 0 0 0 3px rgba(215, 174, 88, 0.15);
}

button {
    width: 100%;
    height: 56px;

    margin-top: 28px;

    border: 0;
    border-radius: 10px;

    background: #d7ae58;
    color: #102538;

    font-size: 16px;
    font-weight: 800;
    cursor: pointer;
}

button:hover {
    filter: brightness(1.07);
}

button:active {
    transform: scale(0.99);
}

#greska {
    min-height: 22px;
    margin-top: 16px;

    text-align: center;
    color: #ff8b8b;
    font-size: 14px;
}

@media (max-width: 520px) {
    .login-card {
        padding: 34px 24px;
    }

    .logo {
        font-size: 30px;
    }

    input,
    button {
        height: 58px;
    }
}