body
 {
    font-family: 'Merriweather', serif;
}

.bg-color {
    background-color: #103d73;
}

.btn-button {
    background: linear-gradient(90deg, #24558d 0%, #1b5ca3 100%);
    color: #fff;
    border: 0;
    padding: .1rem .6rem;
    border-radius: 5px;
    transition: .3s;
}

.btn-button:hover,
.btn-button:focus,
.btn-button:active {
    background: linear-gradient(90deg, #2d67a9 0%, #2c74c8 100%) !important;
    color: #fff !important;
    border: 0;
    box-shadow: none;
    outline: none;
    transform: translateY(-2px);
}

.link-hover:hover {
    text-decoration: underline !important;
    color: #ffffff !important;
}

.branding-header {
    background: #fff;
    border-bottom: 1px solid #e2e8f0;
}

.header-logo {
    max-height: 90px;
    width: auto;
    object-fit: contain;
}

.journal-abbr {
    display: inline-block;
    margin-top: 6px;
    padding: .15rem .6rem;
    border-radius: 4px;
    background: rgba(2, 132, 199, .1);
    color: #0284c7;
    font-size: .75rem;
    font-weight: 700;
}

.main-navbar {
    background: #103d73;
    box-shadow: 0 4px 20px -2px rgba(16, 61, 115, .25);
    padding: 0;
}

.main-navbar .nav-link {
    position: relative;
    overflow: hidden;
    z-index: 1;
    padding: .6rem 1rem !important;
    color: rgba(255, 255, 255, .88) !important;
    font-size: 1rem;
    font-weight: 500;
    transition: color .3s;
}

.main-navbar .nav-link::before {
    content: "";
    position: absolute;
    inset: auto 0 0;
    width: 100%;
    height: 0;
    background: #0284c7;
    z-index: -1;
    transition: height .35s ease;
}

.main-navbar .nav-link:hover::before,
.main-navbar .nav-link.active::before {
    height: 100%;
}

.main-navbar .nav-link:hover,
.main-navbar .nav-link.active {
    color: #fff !important;
}

.search-wrapper .form-control {
    background: rgba(255, 255, 255, .12);
    border: 1px solid rgba(255, 255, 255, .2);
    border-radius: 20px 0 0 20px;
    color: #fff;
    font-size: .85rem;
    padding-left: .85rem;
}

.search-wrapper .form-control::placeholder {
    color: rgba(255, 255, 255, .6);
}

.search-wrapper .form-control:focus {
    background: rgba(255, 255, 255, .2);
    border-color: rgba(255, 255, 255, .4);
    color: #fff;
    box-shadow: none;
}

.search-wrapper .btn-search {
    background: rgba(255, 255, 255, .18);
    border: 1px solid rgba(255, 255, 255, .2);
    border-left: 0;
    border-radius: 0 20px 20px 0;
    color: #fff;
    padding: 0 .85rem;
    transition: .2s;
}

.search-wrapper .btn-search:hover {
    background: #0284c7;
    color: #fff;
}

.footer,
.footer-bottom {
    background: #103d73;
}

.footer-link {
    display: inline-block;
    transition: .2s;
}

.footer-link:hover {
    color: #fff !important;
    transform: translateX(3px);
}

.social-icon {
    border-color: rgba(255, 255, 255, .2) !important;
    transition: .3s;
}

.social-icon:hover {
    background: #0284c7 !important;
    border-color: #0284c7 !important;
    color: #fff !important;
    transform: translateY(-3px);
}

.footer-icon {
    color: #0284c7;
}

/* .hover-card {
    border: 1px solid #dfdfe0 !important;
    transition: .3s;
}

.hover-card:hover {
    box-shadow: 0 10px 24px rgba(15, 23, 42, .12) !important;
} */

.hover-card {
    border: 1px solid #dfdfe0 !important;
    transition: .3s;
    overflow: hidden; 
}

.hover-card:hover {
    box-shadow: 0 10px 24px rgba(15, 23, 42, .12) !important;
}

.hover-card img {
    transition: transform 0.3s ease;
}

.hover-card:hover img {
    transform: scale(1.15);
}

.slider-card {
    width: 270px;
    height: 250px;
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.35s ease-in-out;
    cursor: pointer;
}

.slider-img {
    object-fit: fill;
}

.slider-card:hover {
    transform: translateX(3px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
}

.hero-section {
    position: relative;
    overflow: hidden;
    background: url("../images/cover_page.png")  center / cover no-repeat;
}

.coverpage {
    width: 240px;
    height: 330px;
    margin: 40px auto;
    perspective: 1200px;
    cursor: pointer;
    animation: floatCard 3.5s ease-in-out infinite;
}


.inner {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    --tiltX: 0deg;
    --tiltY: 0deg;
    transform: rotateX(calc(-5deg + var(--tiltX))) rotateY(calc(16deg + var(--tiltY)));
    transition: transform 0.15s ease-out;
}

.inner.flipped {
    transform: rotateX(calc(-5deg - var(--tiltX))) rotateY(calc(168deg - var(--tiltY))) !important;
    transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.front,
.back {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    box-shadow: 15px 15px 25px rgba(0, 0, 0, 0.35), -2px 0 8px rgba(0, 0, 0, 0.15);
}

.front {
    border-radius: 4px 10px 10px 4px;
}

.back {
    transform: rotateY(180deg);
    border-radius: 10px 4px 4px 10px;
}

.front img,
.back img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: fill;
    border-radius: inherit;
}

.front::before,
.back::before {
    content: "";
    position: absolute;
    top: 0;
    width: 14px;
    height: 100%;
}

.front::before {
    left: -14px;
    background: linear-gradient(90deg, #092c74 0%, #1a4ba8 60%, #0d378b 100%);
    transform-origin: right;
    transform: rotateY(-90deg);
    border-radius: 4px 0 0 4px;
}

.back::before {
    right: -14px;
    background: linear-gradient(90deg, #0d378b 0%, #1a4ba8 40%, #092c74 100%);
    transform-origin: left;
    transform: rotateY(90deg);
    border-radius: 0 4px 4px 0;
}

.front::after,
.back::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    border-radius: inherit;
}

.front::after {
    background: linear-gradient(90deg, rgba(0, 0, 0, 0.35) 0%, rgba(255, 255, 255, 0.25) 3%, rgba(0, 0, 0, 0.1) 6%, transparent 12%);
}

.back::after {
    background: linear-gradient(-90deg, rgba(0, 0, 0, 0.35) 0%, rgba(255, 255, 255, 0.25) 3%, rgba(0, 0, 0, 0.1) 6%, transparent 12%);
}

@keyframes floatCard {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.archive-year-heading {
    font-size: 1.5rem;
    color: #212529;
}

.archive-year-heading .text-muted {
    color: #7c8898 !important;
}

.issue-tag {
    color: #2d67a9;
    font-size: 0.75rem;
    text-transform: uppercase;
}

.issue-period-title {
    color: #1a202c !important;
    line-height: 1.3;
}

.article-card,
.archive-card {
    overflow: hidden;
    background: #fff;
    box-shadow: 0 4px 15px rgba(16, 61, 115, 0.08);
    transition: all 0.3s ease;
}

.article-card:hover,
.archive-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 25px rgba(16, 61, 115, 0.15);
}

.cover-img {
    width: 100%;
    height: 320px;
    object-fit: cover;
}

.badge-research {

    background: #eef4ff;
    color: #103d73;
    border: 1px solid #c7d2fe;

}

.article-title {
    font-size: 20px;
    line-height: 1.1;
}

.author {
    font-size: 17px;
    font-weight: 500;
}

@media (max-width:991px) {
    h2 {
        font-size: 1rem;
    }

    .header-logo {
        max-height: 65px;
    }

    .cover-img {
        height: 240px;
    }

    .article-title {
        font-size: 22px;
    }

    .author {
        font-size: 16px;
    }

    .article-desc {
        font-size: 14px;
    }
}


.sign-card {
    border-radius: 10px 10px 0 0;
    overflow: hidden;
}

.sign-card-header {
    background: linear-gradient(180deg, #236fc8 0%, #144b8c 100%);
    color: #fff;
    font-size: 1.1rem;
}



.article-tabs {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 1px;
    box-shadow: 0 4px 15px rgba(16, 61, 115, 0.08);
}

.article-tabs .nav-link {
    border: 0;
    border-radius: 6px;
    padding: .30rem .75rem;
    color: #103d73;
    background: transparent;
    font-size: .95rem;
    font-weight: 500;
    transition: all .3s ease;
}

.article-tabs .nav-link:hover {
    background: rgba(2, 132, 199, .08);
    color: #0284c7;
}

.article-tabs .nav-link.active {
    background: #103d73;
    color: #fff;
    box-shadow: 0 3px 8px rgba(16, 61, 115, .18);
}

.article-section-card {
    background: #fff;
    border: 1px solid #e2e8f0 !important;
    border-radius: 12px;
}
.article-scroll-area {
    max-height: 608px;
    overflow-y: auto;
    overflow-x: hidden;
    padding-right: 8px;
}