body {
    margin: 0;
    padding: 0;
    font-family: "Segoe UI", Arial, sans-serif;
    min-height: 100vh;
    background: radial-gradient(circle at top left, rgba(255,255,255,.18), transparent 25%), linear-gradient(135deg, #0077c8 0%, #00a6d6 100%);
}
.brand-logo {
    width: 96px;
    height: 96px;
    border-radius: 24px;
    background: rgba(255,255,255,0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    overflow: hidden;
}

.brand-logo-img {
    width: 72px;
    height: 72px;
    object-fit: contain;
}
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 30px;
}

.login-card {
    width: 100%;
    max-width: 980px;
    min-height: 560px;
    background: #ffffff;
    border-radius: 28px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, .18);
    display: flex;
}

.login-left {
    width: 45%;
    background: linear-gradient(180deg, #0a6fd6 0%, #0b8fd8 100%);
    color: #fff;
    padding: 42px 36px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.login-logo {
    width: 96px;
    height: 96px;
    border-radius: 24px;
    background: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    overflow: hidden;
    box-shadow: 0 8px 22px rgba(0,0,0,.12);
}

.login-logo-img {
    width: 82px;
    height: 82px;
    object-fit: contain;
}

.login-brand h1 {
    margin: 0 0 12px 0;
    font-size: 32px;
    font-weight: 800;
}

.login-brand p {
    margin: 0;
    font-size: 16px;
    line-height: 1.6;
    color: rgba(255,255,255,.88);
}

.login-features {
    margin-top: 24px;
}

    .login-features .feature-item {
        margin-bottom: 14px;
        font-size: 15px;
        color: rgba(255,255,255,.92);
    }

.login-footer-left {
    font-size: 14px;
    color: rgba(255,255,255,.82);
}

.login-right {
    width: 55%;
    padding: 52px 48px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: #fff;
}

.login-title {
    font-size: 30px;
    font-weight: 800;
    color: #123456;
    margin-bottom: 8px;
}

.login-subtitle {
    color: #6c7a89;
    margin-bottom: 30px;
    font-size: 15px;
}

.form-group {
    margin-bottom: 18px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 600;
    color: #334e68;
}

.form-control {
    width: 100%;
    height: 48px;
    border: 1px solid #dbe4ee;
    border-radius: 14px;
    padding: 0 14px;
    font-size: 15px;
    box-sizing: border-box;
    outline: none;
    transition: all .2s ease;
    background: #f9fbfd;
}

    .form-control:focus {
        border-color: #0a7bdc;
        background: #fff;
        box-shadow: 0 0 0 4px rgba(10,123,220,.12);
    }

.login-button {
    width: 100%;
    height: 50px;
    border: none;
    border-radius: 14px;
    background: linear-gradient(135deg, #0a6fd6, #00a2d8);
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: all .2s ease;
    margin-top: 6px;
}

    .login-button:hover {
        transform: translateY(-1px);
        box-shadow: 0 12px 22px rgba(0,102,204,.25);
    }

.message-box {
    margin-bottom: 18px;
    padding: 12px 14px;
    border-radius: 12px;
    background: #fff3f3;
    border: 1px solid #ffd0d0;
    color: #c62828;
    font-size: 14px;
}

.login-note {
    margin-top: 18px;
    text-align: center;
    color: #7b8794;
    font-size: 13px;
}

@media (max-width: 900px) {
    .login-card {
        flex-direction: column;
        max-width: 520px;
    }

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

    .login-left {
        padding: 32px 26px;
    }

    .login-right {
        padding: 36px 26px;
    }
}