/* Tùy chỉnh dấu chấm indicator */
.carousel-indicators [data-bs-target] {
    width: 5px;
    /* 👈 tăng kích thước */
    height: 5px;
    /* 👈 tăng kích thước */
    border-radius: 50%;
    /* tròn */
    background-color: rgba(255, 255, 255, 0.5);
    margin: 0 6px;
    /* khoảng cách giữa các chấm */
    border: none;
}

.carousel-indicators .active {
    background-color: #ff6666;
    /* màu chấm active */
}

.estimate-inline {
    display: flex;
    flex-direction: column;
    gap: 0;
}



.li-estimate {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
    background: none !important;
    box-shadow: none !important;
    border: none !important;
    padding: 0 !important;
    margin: 0;
}

.estimate-right {
    color: #7ca0d3;
    font-size: 0.98rem;
    font-weight: 400;
    margin-left: 18px;
    white-space: nowrap;
    display: flex;
    align-items: baseline;
    gap: 4px;
    background: none !important;
    box-shadow: none !important;
    padding: 0 !important;
    border: none !important;
}

.estimate-right .icon {
    font-size: 1em;
    color: #7ca0d3;
}

/* COURSE CARDS */
.course-card-section {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin: 40px 0 60px 0;
    flex-wrap: wrap;

}

.course-card {
    max-width: 1300px;
    position: relative;
    width: 320px;
    height: 400px;
    border-radius: 22px;
    overflow: hidden;
    background: #fff;
    box-shadow: 0 2px 16px 0 rgba(0, 0, 0, 0.08);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    transition: box-shadow 0.2s;
}

.course-card:hover {
    box-shadow: 0 6px 24px 0 rgba(32, 90, 177, 0.18);
}

.course-card-bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
    filter: brightness(0.82) saturate(1.1);
    transition: filter 0.2s;
}

.course-card.dark .course-card-bg {
    filter: brightness(0.45) saturate(1.1);
}

.course-card-content {
    position: relative;
    z-index: 2;
    padding: 32px 24px 24px 24px;
    color: #222;
    /*display: flex;*/
    flex-direction: column;
    flex: 1 1 auto;
    min-height: 0;
    justify-content: flex-end;
}

.course-card-title {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: #222;
    text-shadow: 0 2px 8px rgba(255, 255, 255, 0.12);
}

.course-card.dark .course-card-title {
    color: #fff;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.18);
}

.course-card-desc {
    font-size: 1.01rem;
    color: #222;
    margin-bottom: 32px;
    text-shadow: 0 2px 8px rgba(255, 255, 255, 0.10);
}

.course-card.dark .course-card-desc {
    color: #f3f3f3;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.18);
}

.course-card-btn {
    display: inline-block;
    background: rgba(32, 90, 177, 0.85);
    color: #fff;
    font-weight: 600;
    border: none;
    border-radius: 12px;
    padding: 10px 32px;
    font-size: 1.05rem;
    margin-top: 8px;
    cursor: not-allowed;
    box-shadow: 0 2px 8px 0 rgba(32, 90, 177, 0.08);
    transition: background 0.2s;
    text-align: center;
    opacity: 0.92;
}

.course-card-btn:active,
.course-card-btn:focus {
    outline: none;
}

.course-card-btn[disabled] {
    opacity: 0.7;
    cursor: not-allowed;
}

@media (max-width: 1100px) {
    .course-card-section {
        gap: 18px;
    }

    .course-card {
        width: 98vw;
        max-width: 340px;
    }
}

@media (max-width: 900px) {
    .course-card-section {
        flex-direction: column;
        align-items: center;
        gap: 24px;
    }

    .course-card {
        width: 98vw;
        max-width: 370px;
    }
}

.button-style {
    display: inline-block;
    padding: 8px 20px;
    border: 2px solid white;
    border-radius: 20px;
    color: white;
    background-color: transparent;
    font-size: 36px;
    font-weight: 500;
    font-family: sans-serif;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* iconn */

.arrow-icon {
    width: 22px;
    height: 20px;
    margin-left: 8px;
    vertical-align: middle;
}


/* header */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Montserrat';
    background-color: #FFFFFF;
    color: #fff;
}

.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 20px;
}

.content {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 20px;
    justify-content: center;
}

h2,
h4 {
    justify-content: center;
    color: #fff;
    font-size: 84px;
}

.hero-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 10;
    color: white;
    width: 100%;
}

.button-style {
    display: inline-block;
    padding: 8px 20px;
    border: 2px solid white;
    border-radius: 20px;
    color: white;
    background-color: transparent;
    font-size: 34px;
    font-weight: 500;
    font-family: sans-serif;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
}


.hero {
    padding: 40px 0;
}

.hero-content {
    position: relative;
    min-height: 420px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1a1a1a 0%, #000 50%, #1a1a1a 100%);
}

.hero-text {
    /* position: relative; */
    z-index: 1;
    flex: 1;
    padding: 20px;
}

.hero-text h2 {
    color: #FFD1D1;
    font-size: 84px;
    font-weight: bold;
    margin-bottom: 15px;
}

.hero-text h3 {
    color: #FFFFFF;
    margin-bottom: 15px;
}

.hero-text p {
    font-size: 30px;
    line-height: 1.6;
    margin-bottom: 20px;
    color: #FFFFFF;
}

.hero-text .btn {
    background-color: #7fff00;
    color: #000;
    padding: 12px 24px;
    border: none;
    font-weight: bold;
    cursor: pointer;
    border-radius: 6px;
    text-transform: uppercase;
}

.hero-image {
    position: relative;
    z-index: 1;
    display: flex;
    gap: 32px;
    align-items: center;
    justify-content: center;
    margin-top: 24px;
    flex: 1;
    padding: 20px;
}

.hero-image img {
    max-width: 100%;
    height: auto;
}

/* NÔI DUNG RS x HS */

.feature-section {
    /* padding: 80px 0; */
    max-width: 1300px;
    margin: 0 auto;
}

.feature-row {
    display: flex;
    align-items: center;
    gap: 60px;
    margin-bottom: 80px;
    padding: 0 40px;
}

.feature-row.reverse {
    flex-direction: row-reverse;
}

.feature-text {
    flex: 1;
}

.feature-logo {
    width: 350px;
    margin-bottom: 20px;
}

.feature-title {
    font-size: 2rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 20px;
}

.feature-desc {
    font-size: 1.1rem;
    color: #000000;
    margin-bottom: 22px;
}

.feature-list {
    list-style: none;
    margin: 20px 0;
}

.feature-list li {
    padding: 5px 0;
    color: #000000;
    position: relative;
    padding-left: 22px;
}

.feature-list li:before {
    content: "•";
    color: #3b82f6;
    font-weight: bold;
    position: absolute;
    left: 0;
}

.feature-link {
    color: #3b82f6;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.feature-img {
    flex: 1;
}

.feature-img img {
    width: 100%;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}


@media (max-width: 900px) {

    .feature-row,
    .feature-row.reverse {
        flex-direction: column !important;
        gap: 24px;
    }

    .feature-img,
    .feature-text {
        min-width: 0;
    }
}


/* khoahoc */
/* Course Section Styles */
.course-section-title {
    text-align: center;
    font-size: 2.25rem;
    font-weight: 700;
    color: #1e293b;
    margin: 60px 0 40px 0;
}

.accordion-container {
    max-width: 800px;
    margin: 0 auto 60px auto;
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.accordion-item {
    border-bottom: 1px solid #e2e8f0;
}

.accordion-item:last-child {
    border-bottom: none;
}

.accordion-header {
    width: 100%;
    padding: 24px 28px;
    text-align: left;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 600;
    color: #374151;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s ease;
}

.accordion-header:hover {
    background-color: #f8fafc;
}

.accordion-header.active {
    background-color: #f1f5f9;
    color: #1e40af;
}

.accordion-icon {
    width: 24px;
    height: 24px;
    transition: transform 0.3s ease;
    opacity: 0.6;
}

.accordion-header.active .accordion-icon {
    transform: rotate(180deg);
    opacity: 1;
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    background-color: #fafbfc;
}

.accordion-content.active {
    max-height: 300px;
}

.accordion-body {
    padding: 0 28px 24px 28px;
}

.accordion-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.accordion-list li {
    padding: 8px 0;
    color: #64748b;
    font-size: 1rem;
    /*display: flex;*/
    align-items: center;
    gap: 12px;
}

.accordion-list .icon {
    font-size: 1.2rem;
}

.li-estimate {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.accordion-estimate {
    color: #205AB1;
    font-weight: 500;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

.accordion-estimate .icon {
    font-size: 1.2rem;
    color: #205AB1;
}

.center-estimate {
    justify-content: center !important;
}

@media (max-width: 600px) {
    .accordion-container {
        max-width: 98vw;
    }

    .accordion-content {
        padding: 14px 10px 10px 10px;
    }
}

/* học viên */

.testimonial-section-title {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    color: #000000;
    margin: 48px 0 32px 0;
    font-family: 'Roboto', sans-serif;
}

.button {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    margin: 48px 0 32px 0;
}

.testimonial-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 1300px;
    margin: 0 auto 40px auto;
}

.testimonial-card {
    background: #f7fbfd;
    border: 1.5px solid #e3eaf2;
    border-radius: 18px;
    box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.04);
    padding: 24px 20px 18px 20px;
    display: flex;
    flex-direction: column;
    min-height: 220px;
    font-family: 'Roboto', sans-serif;
}

.testimonial-header {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
}

.avatar {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    object-fit: cover;
    margin-right: 16px;
    border: 2.5px solid #e3eaf2;
    box-shadow: 0 2px 8px 0 rgba(32, 90, 177, 0.10);
}

.name-date {
    display: flex;
    flex-direction: column;
}

.name {
    font-weight: 600;
    font-size: 1.08rem;
    color: #222;
}

.date {
    font-size: 0.95rem;
    color: #b0b8c9;
    margin-top: 2px;
}

.testimonial-card .content {
    color: #444;
    font-size: 1rem;
    margin-top: 8px;
    line-height: 1.5;
}

@media (max-width: 900px) {
    .testimonial-container {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 600px) {
    .testimonial-container {
        grid-template-columns: 1fr;
    }
}


@media (max-width: 768px) {
    .hero {
        padding: 16px 0 0 0;
    }

    .hero-content {
        min-height: 220px;
        padding: 0;
    }

    .hero-bg {
        background-size: cover !important;
        background-position: center !important;
    }

    .hero-text {
        padding: 0 8px;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        position: absolute;
        width: 100vw;
        max-width: 100vw;
        z-index: 10;
    }

    .hero-text h2 {
        color: #FFD1D1;
        font-size: 20px;
        font-weight: bold;
        margin-bottom: 15px;
    }

    .hero-text h3 {
        font-size: 1.1rem;
        margin-bottom: 6px;
        color: #fff;
    }

    .hero-text p {
        font-size: 14px;
        margin-bottom: 8px;
        color: #fff;
    }

    .feature-logo {
        /* max-width: 140px; */
        margin-bottom: 10px;

    }
}

@media (max-width: 600px) {
    .accordion-content {
        padding: 10px 2vw 8px 2vw;
    }

    .accordion-list li,
    .li-estimate {
        font-size: 0.97rem;
        gap: 4px;
        margin-bottom: 4px;
    }

    .estimate-right {
        font-size: 0.93rem;
        margin-left: 6px;
        gap: 2px;
    }

    .accordion-list {
        padding: 0 2px;
    }

    .course-card-section {
        flex-direction: column;
        gap: 18px;
    }

    .course-card {
        width: 98vw;
        max-width: 98vw;
        min-width: 0;
        height: 340px;
    }

    .avatar {
        width: 40px;
        height: 40px;
        margin-right: 8px;
    }
}