/* RESET */
* {
    box-sizing: border-box;
}

/* BODY */
body {
    background: linear-gradient(135deg, #0d6efd, #6610f2);
    min-height: 100vh;
    font-family: 'Segoe UI', system-ui, sans-serif;
    padding: 1rem;
}

/* CARD */
.card {
    border-radius: 22px;
    border: none;
    width: 96%;
    max-width: 520px;
    min-height: 75vh;
    margin: auto;
    display: flex;
    align-items: center;
}

/* CARD CONTENT */
.card-body {
    width: 100%;
    padding: 2.5rem 2rem;
    text-align: center;
}

/* LOGO / TITLE */
.logo {
    font-size: 2.6rem;
    font-weight: 900;
    color: #0d6efd;
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 1.15rem;
    color: #6c757d;
    margin-bottom: 2rem;
}

/* INPUTS */
input.form-control {
    height: 64px;
    font-size: 1.15rem;
    border-radius: 18px;
    padding-left: 1.2rem;
}

/* BUTTON */
button.btn,
a.btn {
    height: 64px;
    font-size: 1.2rem;
    border-radius: 20px;
    font-weight: 700;
}

/* ALERTS */
.alert {
    border-radius: 18px;
    font-size: 1.1rem;
    padding: 1.2rem;
}

/* FOOTER TEXT */
small.text-muted {
    font-size: 1rem;
}

/* DESKTOP ADJUSTMENTS */
@media (min-width: 768px) {
    .card {
        min-height: auto;
        max-width: 420px;
    }

    .logo {
        font-size: 2.1rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    input.form-control,
    button.btn,
    a.btn {
        height: 54px;
        font-size: 1rem;
    }
}