html, body {
    height: 100%;
    margin: 0;
    font-family: sans-serif;
}

.container {
    display: flex;
    height: 100vh;
}

/* PANEL ĐĂNG NHẬP */
.login-panel {
    width: 30%;
    background: #0a3d91; /* xanh dương đậm */
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-content {
    text-align: center;
    color: #fff;
    width: 80%;
    padding: 20px;
    background: rgba(255,255,255,0.1);
    border-radius: 12px;
}

.logo {
    width: 120px;
    margin-bottom: 20px;
}

.login-box {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

    .login-box input, .login-box button {
        padding: 10px;
        font-size: 1rem;
    }

    .login-box button {
        background: #fff;
        color: #0a3d91;
        border: none;
        cursor: pointer;
    }

.copyright {
    margin-top: 50px;
    font-size: 0.9rem;
}

/* PANEL SMARTART */
.smartart-panel {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #eef2f5;
}

.smartart-wrapper {
    width: 80vmin;
    height: 80vmin;
    position: relative;
}

.smartart {
    width: 100%;
    height: 100%;
    position: relative;
}

.center-circle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    width: 18vmin;
    height: 18vmin;
    background: #fff;
    border: 8px solid orange;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

    .center-circle .title {
        font-size: 1.5rem;
        font-weight: bold;
    }

    .center-circle .subtitle {
        font-size: 0.9rem;
        color: #666;
    }

/* Vòng tròn xung quanh */
.items-container .item {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 14vmin;
    height: 14vmin;
    background: #004080;
    border-radius: 50%;
    text-align: center;
    color: #fff;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transform: translate(-50%,-50%);
    transition: background .3s, transform .3s;
    text-decoration: none;
}

    .items-container .item:hover {
        background: #0066cc;
        transform: translate(-50%,-50%) scale(1.1);
    }

    .items-container .item i {
        font-size: 2rem;
        margin-bottom: 6px;
    }

    .items-container .item span {
        font-size: 0.9rem;
    }

/* SVG connectors */
.connectors {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }

    .login-panel {
        width: 90%;       
        padding: 20px;
        display: block;
    }

    .smartart-panel {
        width: 100%;
        height: 60vh;
    }

    .smartart-wrapper {
        width: 90vmin;
        height: 90vmin;
    }

    .center-circle {
        width: 20vmin;
        height: 20vmin;
    }

    .items-container .item {
        width: 12vmin;
        height: 12vmin;
    }
}