:root {
    --tnai-blue: #1a76d2;
    --tnai-light-blue: #e3f2fd;
    --tnai-dark-blue: #0d47a1;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
}

.hero-section {
    background: linear-gradient(rgba(26, 118, 210, 0.9), rgba(13, 71, 161, 0.9)), url('https://images.unsplash.com/photo-1559757148-5c350d0d3c56?ixlib=rb-1.2.1&auto=format&fit=crop&w=1350&q=80');
    background-size: cover;
    background-position: center;
    color: white;
    padding: 100px 0;
}

.btn-primary {
    background-color: var(--tnai-blue);
    border-color: var(--tnai-blue);
}

    .btn-primary:hover {
        background-color: var(--tnai-dark-blue);
        border-color: var(--tnai-dark-blue);
    }

.btn-outline-light:hover {
    color: var(--tnai-blue);
}

.section-title {
    color: var(--tnai-dark-blue);
    position: relative;
    padding-bottom: 15px;
    margin-bottom: 30px;
}

    .section-title:after {
        content: '';
        position: absolute;
        bottom: 0;
        left: calc(50% - 30px);
        width: 60px;
        height: 3px;
        background-color: var(--tnai-blue);
    }

.course-card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    height: 100%;
}

    .course-card:hover {
        transform: translateY(-5px);
    }

.benefit-icon {
    font-size: 2.5rem;
    color: var(--tnai-blue);
    margin-bottom: 15px;
}

.member-advantage {
    background-color: var(--tnai-light-blue);
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    height: 100%;
}

.advantage-icon {
    font-size: 2.5rem;
    color: var(--tnai-blue);
    margin-bottom: 15px;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--tnai-blue);
    color: white;
    border-radius: 50%;
    font-weight: bold;
    margin-bottom: 15px;
}

.faq-item {
    border-bottom: 1px solid #e0e0e0;
    padding: 15px 0;
}

footer {
    background-color: #2c3e50;
    color: white;
}

.footer-links a {
    color: #ecf0f1;
    text-decoration: none;
    transition: color 0.3s;
}

    .footer-links a:hover {
        color: var(--tnai-blue);
    }

.ig {
    width: 100%;
    border-radius: .5rem;
}

.about-tnai {
    background: linear-gradient(135deg, #f3efff 0%, #e6e2ff 100%);
    padding: 80px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

    .about-tnai h2 {
        color: #1e0e7a;
        font-weight: 700;
        font-size: 2.2rem;
        margin-bottom: 50px;
    }

.about-items {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    position: relative;
    max-width: 1100px;
    margin: 0 auto;
}

    .about-items::before {
        content: "";
        position: absolute;
        top: 27px;
        left: 5%;
        width: 90%;
        height: 2px;
        background: #cfcaf7;
        z-index: 1;
    }

.about-item {
    flex: 1;
    padding: 0 20px;
    position: relative;
    z-index: 2;
}

.icon-box {
    background: #e9e6fa;
    border: 2px solid #cfcaf7;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 55px;
    height: 55px;
    margin-bottom: 20px;
    position: relative;
    z-index: 3;
}

    .icon-box img {
        height: 36px;
    }

.about-item h4 {
    color: #1e0e7a;
    font-weight: 700;
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.about-item p {
    color: #3d3a52;
    font-size: 0.95rem;
    line-height: 1.5;
    max-width: 320px;
    margin: 0 auto;
}

/* Responsive */
@media (max-width: 992px) {
    .about-items {
        flex-direction: column;
        gap: 40px;
    }

        .about-items::before {
            display: none;
        }

    .icon-box {
        margin-bottom: 10px;
    }
}


.benefit-card {
    text-align: center;
    background-color: #f4f6fc;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    width: 100%;
}

    .benefit-card h4 {
        color: #1e0e7a;
        font-weight: 700;
        font-size: 1.2rem;
    }

    .benefit-card .icon {
        margin-bottom: 1rem;
    }

        .benefit-card .icon img {
            height: 36px;
        }

.benefit-section {
    background: linear-gradient(45deg, #d0c9ff, #c9f7f1);
    padding: 40px 0;
}

.benefit-title {
    color: #1e0e7a;
    font-size: 2rem;
    font-weight: bold;
}

.image-section {
    background: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.navbar-nav .nav-item .nav-link {
    position: relative;
}

    .navbar-nav .nav-item .nav-link:hover, .navbar-nav .nav-item .nav-link.active {
        color: #1a76d2;
    }

        .navbar-nav .nav-item .nav-link.active:before {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 3px;
            background: #1a76d2;
        }

.formAuth {
    box-shadow: -4px 0 12px rgba(0, 0, 0, .1);
    border: 1px solid rgba(0, 0, 0, .1);
    border-radius: .9rem;
    background: rgba(255, 255, 255, .99);
    margin: 0 auto;
    padding:1.5rem;
}