/* ==========================================================================
   1. VARIABLES & GLOBAL STYLES
   ========================================================================== */

body {
    background-color: var(--navy-bg);
    color: var(--text-main);
}

/* ==========================================================================
   2. REFACTORED COMPONENTS & UTILITIES
   ========================================================================== */
/* Buttons & Links */
.btn-custom-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 18px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    background: var(--navy-card);
    color: var(--text-main);
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

.btn-custom-outline:hover {
    border-color: var(--gold);
    color: var(--gold);
    background: var(--navy-input);
}

.btn-link-demo {
    width: fit-content;
    background-color: var(--gold);
    padding: 8px 16px;
    border-radius: 8px;
    text-decoration: none;
    color: var(--white);
    font-weight: 600;
    box-shadow: var(--shadow-main);
    transition: var(--transition);
}

.btn-link-demo:hover {
    background-color: var(--gold-hover);
    color: var(--white);
}

/* Badges */
.custom-badge {
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 6px;
    letter-spacing: 0.5px;
}

.badge-gold {
    background-color: var(--gold);
    color: var(--white);
}

/* Typography Helpers */
.line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.object-fit-cover {
    object-fit: cover;
}

.section-title {
    position: relative;
    padding-left: 14px;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-main);
}

.accent-line {
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 100%;
    max-height: 20px;
    background-color: var(--gold);
    border-radius: 2px;
}

/* ==========================================================================
   3. HERO BANNER & APP DOWNLOAD SECTION
   ========================================================================== */
.banner-wrapper {
    width: 100%;
    overflow: hidden;
    border-radius: 16px;
    box-shadow: var(--shadow-card);
    background-color: #0d4b75;
    aspect-ratio: 16 / 9;
}

.banner-picture {
    display: block;
    width: 100%;
    height: 100%;
}

.banner-image {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition);
}

@media (hover: hover) {
    .banner-wrapper:hover .banner-image {
        transform: scale(1.02);
    }
}

#app-download {
    display: flex;
    margin-top: 2rem;
    justify-content: center;
}

#app-download .logo {
    width: 50%;
    padding: 16px;
    box-shadow: var(--shadow-card);
    border-radius: 16px;
    background: var(--navy-card);
    border: 1px solid var(--border-color);
}

#app-download .logo img {
    width: 100%;
}

#app-download .content {
    display: flex;
    justify-content: space-around;
    padding: 32px 48px;
    align-items: center;
    box-shadow: var(--shadow-card);
    border-radius: 16px;
    flex-direction: column;
    background: var(--navy-card);
    border: 1px solid var(--border-color);
}

#app-download .content .content-body,
#app-download .content .download-link {
    margin: 0 1rem;
}

#app-download .content .download-link {
    display: flex;
    width: 100%;
    justify-content: center;
}

#app-download .download-link a + a {
    margin-left: 1rem;
}

/* ==========================================================================
   4. NEWS & EXAM LIST SECTIONS
   ========================================================================== */
.news-section {
    background: var(--navy-card);
    padding: 1.5rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-main);
}

.main-news-card {
    transition: transform var(--transition), box-shadow var(--transition);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: var(--navy-card);
}

.main-news-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-card);
}

.side-news-card {
    transition: background-color var(--transition);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--navy-card);
}

.side-news-card:hover {
    background-color: var(--navy-input);
}

.side-news-thumb {
    width: 90px;
    height: 68px;
    border-radius: 8px;
    overflow: hidden;
}

.news-img-zoom {
    transition: transform var(--transition);
    object-fit: cover;
    width: 100%;
    height: 100%;
}

.main-news-card:hover .news-img-zoom,
.side-news-card:hover .news-img-zoom {
    transform: scale(1.08);
}

.exam-item {
    transition: background-color var(--transition), border-color var(--transition);
    border-radius: 8px;
}

.exam-item:hover {
    background-color: var(--navy-input);
    border-color: var(--gold) !important;
}

.pdf-preview-box {
    width: 56px;
    height: 56px;
    border-radius: 8px;
    background: var(--navy-input);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* ==========================================================================
   5. SIDEBAR COMPONENTS
   ========================================================================== */
.sidebar-box {
    background: var(--navy-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: var(--shadow-main);
}

.rank-number {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-dim);
    min-width: 24px;
    text-align: center;
}

.small-title {
    font-size: 0.95rem;
    font-weight: 500;
    line-height: 1.4;
    color: var(--text-main);
    transition: color var(--transition);
}

.small-title:hover {
    color: var(--gold) !important;
}

.app-sidebar-item {
    transition: var(--transition);
    border: 1px solid var(--border-color);
    background: var(--navy-card);
    cursor: pointer;
    border-radius: 8px;
}

.app-sidebar-item:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-card);
    border-color: var(--gold);
}

.app-sidebar-icon {
    width: 54px;
    height: 54px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: var(--shadow-main);
}

.app-sidebar-title {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.download-badge {
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 20px;
    text-decoration: none;
    transition: var(--transition);
}

.badge-ios {
    background: #000000;
    color: #ffffff;
}

.badge-android {
    background: #34a853;
    color: #ffffff;
}

.download-badge:hover {
    opacity: 0.8;
    color: #ffffff;
}

/* ==========================================================================
   6. COURSE & EXTRA LAYOUT SECTIONS
   ========================================================================== */
.course-content {
    display: flex;
}

.course-details {
    display: flex;
    width: 24%;
    flex-direction: column;
    justify-content: center;
    min-height: 350px;
}

.course-details h2 {
    color: var(--white);
    margin-bottom: 1.8rem;
}

.course-action {
    position: relative;
    margin-bottom: 1rem;
    left: 25%;
}

.course-action img {
    width: 35px;
}

.course-action a + a {
    margin-left: 1rem;
}

.course-action img:hover {
    opacity: 0.8;
}

#course-list {
    width: 76%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-left: 7rem;
}

.course-item_image {
    box-shadow: var(--shadow-main);
    padding: 2rem;
    background-color: var(--navy-card);
    border: 1px solid var(--border-color);
}

.course-item_image img {
    width: 100%;
    border-radius: 0.5rem;
}

.course-item_image,
.course-item_download {
    width: 15rem;
    border-radius: 0.5rem;
}

.course-item_download {
    box-shadow: var(--shadow-main);
    background-color: var(--navy-card);
    padding: 0.8rem 2rem;
    border: 1px solid var(--border-color);
}

.course-item_download img {
    width: 100%;
}

.download-link-sub {
    display: flex;
}

.download-link-sub a + a {
    margin-right: 1rem;
}

#course-math {
    display: flex;
    flex-direction: column;
    justify-content: center;
    margin-top: 5rem;
    position: relative;
    min-height: 400px;
    justify-content: space-around;
}

#course-math .background {
    width: 100%;
    height: 100%;
    z-index: -1;
    left: -30%;
    background-color: #78e2f0;
    position: absolute;
    border-radius: 0 16px 16px 0;
}

#course-english {
    display: flex;
    flex-direction: column;
    justify-content: center;
    margin-top: 5rem;
    position: relative;
    min-height: 400px;
    justify-content: space-around;
}

#course-english .background {
    width: 100%;
    height: 100%;
    z-index: -1;
    right: -30%;
    background-color: #78e2f0;
    position: absolute;
    border-radius: 16px 0 0 16px;
}

#course-english #course-list {
    padding-left: 0;
    padding-right: 7rem;
}

#course-english .course-content {
    flex-direction: row-reverse;
}

#course-english .course-action {
    left: 75%;
}

#course-english .course-details {
    text-align: end;
}

#wrapper-video {
    margin-top: 5rem;
    background: url("/static/img/green-bg.ecc762cd4391.png") no-repeat;
    background-size: cover;
    padding-top: 6rem;
    min-height: 700px;
}

#course-video {
    margin-top: 5rem;
    min-height: 500px;
}

.course-video {
    display: flex;
    min-height: 400px;
}

.course-video .detail {
    width: 40%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-right: 2rem;
}

.course-video .detail h2 {
    margin-bottom: 1.8rem;
}

.course-video .video {
    width: 60%;
    padding: 0.5rem;
    border-radius: 1rem !important;
}

.video iframe {
    width: 100%;
    height: 100%;
    border-radius: 1rem;
}

#wrapper-details {
    position: relative;
    left: -10px;
}

.wrapper-details {
    display: flex;
    min-height: 450px;
}

.details-content {
    width: 60%;
    padding: 3rem 4rem 0;
}

.details-content h2 {
    margin-bottom: 1.8rem;
}

.details-content p {
    margin-bottom: 3rem;
}

.details-image-container {
    width: 40%;
}

.details-image {
    position: absolute;
    left: 0%;
    top: -30%;
    width: 40%;
}

.details-image img {
    width: 100%;
}

.details-content .download-link {
    display: flex;
    justify-content: center;
}

.details-content .download-link a + a {
    margin-left: 1rem;
}

/* ==========================================================================
   7. RESPONSIVE MEDIA QUERIES
   ========================================================================== */
@media (max-width: 1200px) {
    #app-download .content {
        flex-direction: column;
        align-items: flex-start;
    }
    #app-download .logo {
        width: 30%;
    }
    .course-details {
        width: 30%;
    }
    #course-list {
        width: 70%;
    }
    #course-english #course-list {
        padding-right: 2.5rem;
    }
    .details-content {
        padding: 1rem 2rem;
    }
    .download-link-sub {
        flex-direction: column;
        align-items: center;
    }
    .download-link-sub a + a {
        margin-right: 0;
        margin-top: 0.5rem;
    }
}

@media (max-width: 990px) {
    #app-download {
        box-shadow: var(--shadow-card);
        border-radius: 1rem;
        align-items: center;
        justify-content: center;
    }
    #app-download .logo,
    #app-download .content {
        box-shadow: none !important;
    }
    #app-download .content {
        padding: 1rem;
        padding-left: 2rem;
    }
    .course-details {
        width: 35%;
    }
    #course-list {
        width: 65%;
    }
    .details-content {
        padding: 1rem 0;
    }
    .wrapper-details {
        display: flex;
        min-height: 400px;
    }
}

@media (max-width: 768px) {
    #app-download .content {
        padding: 1rem 0;
        width: 70%;
    }
    #app-download .logo {
        padding-right: 0;
        width: 30%;
    }
    #app-download .content .download-link {
        flex-direction: column;
        align-items: center;
    }
    #app-download .download-link a + a {
        margin-left: 0rem;
        margin-top: 0.5rem;
    }
    .download-link a + a {
        margin-top: 0.5rem;
    }
    .course-video {
        flex-direction: column;
    }
    .course-video .video {
        width: 100%;
        padding: 0.4rem;
        height: 300px;
    }
    .course-video .detail {
        width: 100%;
        margin-bottom: 1rem;
    }
    #course-math .background,
    #course-english .background {
        width: 200%;
    }
    #course-list {
        padding-left: 2rem;
    }
    .course-details,
    #course-list {
        width: 50%;
    }
    .course-action,
    #course-english .course-action {
        left: 40%;
    }
    .details-image {
        top: 10%;
    }
    #wrapper-video {
        padding-top: 2rem;
    }
    .details-content .download-link {
        flex-direction: column;
        align-items: center;
    }
    .details-content .download-link a + a {
        margin-left: 0;
    }
}

@media (max-width: 450px) {
    #app-download .content .download-link {
        margin: 0;
    }
    #app-download {
        flex-direction: column;
    }
    #app-download .content-body {
        text-align: center;
    }
    #app-download .content {
        width: 100%;
    }
    #app-download .logo {
        padding: 1rem;
        width: 50%;
    }
    .wrapper-details,
    .course-content,
    #course-english .course-content {
        flex-direction: column;
    }
    #course-english .course-details {
        text-align: start;
    }
    .details-image-container {
        height: 200px;
    }
    .details-content {
        width: 100%;
        text-align: center;
        padding: 1rem 2rem;
    }
    .details-image {
        top: -5%;
        width: 55%;
    }
    #course-english #course-list {
        padding-right: 0;
    }
    .course-details {
        min-height: auto;
        width: 100%;
        margin: 1.5rem 0;
    }
    #course-list {
        width: 100%;
        padding-left: 0;
        margin-bottom: 1rem;
    }
    .slick-slide {
        margin: 0 10px;
    }
}