body {
    margin: 0;
    height: 100vh;
    font-family: 'Inter', sans-serif;
    background: #f5f6fa;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* MAIN CARD */
.login-card {
    width: 900px;
    height: 420px;
    background: linear-gradient(145deg, #111, #1a1a1a);
    border-radius: 18px;
    display: flex;
    box-shadow: 0 30px 80px rgba(0,0,0,.35);
    overflow: hidden;
}

/* LEFT PANEL */
.login-left {
    width: 50%;
    padding: 50px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    color: #fff;
}

    .login-left img {
        width: 110px;
        margin-bottom: 25px;
    }

.brand-title {
    font-size: 34px;
    font-weight: 700;
    letter-spacing: 1px;
}

    .brand-title span {
        color: #9EFF00;
    }

.brand-sub {
    margin-top: 8px;
    font-size: 14px;
    opacity: .75;
    letter-spacing: 1px;
}

/* DIVIDER */
.divider {
    width: 1px;
    background: rgba(255,255,255,.15);
}

/* RIGHT PANEL */
.login-right {
    width: 50%;
    padding: 50px;
    color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.form-group {
    margin-bottom: 22px;
}

label {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 6px;
    display: block;
}

input {
    width: 100%;
    padding: 14px;
    border-radius: 8px;
    border: none;
    outline: none;
    font-size: 14px;
}

.btn-login {
    margin-top: 15px;
    background: #9EFF00;
    color: #111;
    border: none;
    padding: 14px;
    border-radius: 8px;
    font-weight: 700;
    cursor: pointer;
    transition: all .2s ease;
}

    .btn-login:hover {
        background: #b7ff3c;
    }

.validation {
    color: #ff6b6b;
    font-size: 13px;
    margin-top: 12px;
}

.login-message {
    margin-top: 14px;
    padding: 12px 14px;
    border-radius: 10px;
    border: 1px solid transparent;
    font-size: 13px;
    line-height: 1.5;
    font-weight: 600;
}

.login-message--info {
    border-color: rgba(158, 255, 0, 0.22);
    background: rgba(158, 255, 0, 0.08);
    color: #e7ffc2;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.login-message--error {
    border-color: rgba(255, 107, 107, 0.22);
    background: rgba(255, 107, 107, 0.08);
    color: #ff9b9b;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

/* MOBILE RESPONSIVE */
@media (max-width: 900px) {
    .login-card {
        flex-direction: column;
        height: auto;
        width: 95%;
    }

    .login-left,
    .login-right {
        width: 100%;
        text-align: center;
    }

    .divider {
        display: none;
    }
}