body, .modern-login-bg {
    background: #fff;
    min-height: 100vh;
    color: #000;
    font-size: 1.15rem;
    font-weight: bold;
    letter-spacing: 0.5px;
}

.modern-login-logo-large {
    width: 180px;
    height: auto;
    display: block;
    margin: 0 auto;
    padding: 0;
    background: none;
    box-shadow: none;
    border-radius: 0;
}

.modern-login-card {
    border-radius: 18px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.18);
    border: 3px solid #000;
    width: 390px;
    max-width: 98vw;
    margin: 0 1rem;
    background: #fff;
    color: #000;
    font-weight: bold;
}

.card-title {
    font-weight: 900;
    color: #000;
    letter-spacing: 1px;
    font-size: 1.5rem;
}

.form-control {
    font-size: 1.15rem;
    font-weight: bold;
    color: #000;
    background: #fff;
    border: 2px solid #000;
    border-radius: 8px;
    box-shadow: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

    .form-control:focus {
        border-color: #0057FF;
        box-shadow: 0 0 0 3px #0057FF55;
        background: #fff;
        color: #000;
    }

.modern-login-btn {
    font-size: 1.2rem;
    font-weight: bold;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.12);
    background: #0057FF;
    color: #fff !important;
    border: 3px solid #0057FF;
    transition: background 0.2s, box-shadow 0.2s, color 0.2s, border-color 0.2s;
}

    .modern-login-btn:focus, .modern-login-btn:hover {
        background: #003EA6 !important;
        color: #fff !important;
        border-color: #003EA6;
        box-shadow: 0 4px 16px rgba(0,0,0,0.18);
    }

.modern-pin-key {
    width: 54px;
    height: 54px;
    font-size: 1.3rem;
    border-radius: 8px;
    font-weight: bold;
    color: #000;
    background: #fff;
    border: 3px solid #0057FF;
    transition: background 0.15s, color 0.15s, border-color 0.15s;
    flex: 1 1 0;
    min-width: 0;
    min-height: 0;
    max-width: none;
    max-height: none;
}

    .modern-pin-key:focus, .modern-pin-key:hover {
        background: #0057FF;
        color: #fff;
        border-color: #0057FF;
    }

.text-danger {
    font-size: 1.1rem;
    color: #FF2D55 !important;
    font-weight: bold;
}

/* Tablet breakpoint */
@media (max-width: 900px) {
    .modern-login-card {
        width: 95vw;
        max-width: 420px;
        padding: 1.5rem 0.5rem;
    }

    .modern-pin-key {
        font-size: 1.1rem;
    }
}

/* Mobile breakpoint */
@media (max-width: 600px) {
    .modern-login-card {
        width: 99vw !important;
        max-width: 100vw;
        padding: 1rem 0.2rem;
    }

    .modern-pin-key {
        font-size: 1rem;
        width: 44px;
        height: 44px;
    }

    .card-title {
        font-size: 1.2rem;
    }
}

/* Extra small devices */
@media (max-width: 400px) {
    .modern-login-card {
        width: 100% !important;
        padding: 0.5rem;
    }
}