/* ==============================
   Animations
================================*/
.fade-up {
    opacity: 0;
    animation: fadeUp .8s ease-out forwards;
}
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(18px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ==============================
   GREEN SECTION HEADERS
================================*/
.choose-header,
.section-header {
    background: #0b4d26;
    padding: 30px 20px;
    border-radius: 18px;
    text-align: center;
    margin: 40px auto 35px;
    max-width: 1100px;
    box-shadow:
        0 10px 24px rgba(0, 0, 0, 0.18),
        inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.choose-header h2,
.section-header h2 {
    color: #ffffff;
    margin: 0;
    font-weight: 700;
    letter-spacing: .3px;
}

.section-header p {
    color: #d9efe4;
    font-size: .9rem;
    margin-top: 6px;
    margin: 0;
}

/* ==============================
   Strand Cards
================================*/
.strand-card {
    border: 2px solid #0b4d26;
    padding: 38px 26px;
    border-radius: 14px;
    background: #ffffff;
    transition: .25s ease;
    text-align: center;
    height: 100%;
}

.strand-card h2,
.strand-card h5 {
    color: #0b4d26;
    font-weight: 700;
}

.strand-card small {
    color: #5f7f6c;
}

.strand-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 26px rgba(0,0,0,.15);
}

/* ==============================
   Paper Card
================================*/
.paper-card {
    border: 2.5px solid #06361b;
    background: #ffffff;
    padding: 28px 34px;
    border-radius: 16px;
    transition: .25s ease;
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.15);
}

.paper-card:hover {
    border-color: #0b4d26;
    box-shadow: 0 16px 36px rgba(0,0,0,.25);
}

.paper-wrapper {
    transition: transform .25s ease;
}

.paper-wrapper:hover {
    transform: translateY(-12px); /* realistic lift */
}

/* ==============================
   Badges
================================*/
.strand-badge,
.spec-badge {
    background: #0b4d26;
    color: #fff;
    padding: 6px 12px;
    font-size: .7rem;
    border-radius: 20px;
    font-weight: 600;
}

.badge.keyword-badge {
    background-color: var(--bs-badge-bg, #0b4d26) !important;
    color: var(--bs-badge-color, #ffffff) !important;

    font-size: .7rem;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 20px;
}

.award-badge {
    background: linear-gradient(135deg, #f4c430, #d4a017);
    color: #ffffff;
    padding: 6px 12px;
    font-size: .7rem;
    border-radius: 20px;
    font-weight: 700;
    margin-right: 6px;
    box-shadow: 0 4px 10px rgba(0,0,0,.25);
}

/* ==============================
   Typography
================================*/
.paper-title a {
    color: #0b4d26;
    font-weight: 700;
    text-decoration: none;
}

.paper-title a:hover {
    text-decoration: underline;
}

.pub-date {
    color: #6b7c8f;
    font-size: .82rem;
}

.authors {
    font-size: .85rem;
    color: #2d3748;
}

.abstract-text {
    font-size: .95rem;
    color: #2d3748;
}

/* ==============================
   Read More
================================*/
.read-more {
    color: #0b4d26;
    font-weight: 600;
    text-decoration: underline;
    font-size: .9rem;
}

.read-more:hover {
    text-decoration-thickness: 2px;
}

/* ==============================
   Back Button
================================*/
.back-btn {
    background: transparent;
    border: 1.5px solid #ffffff;
    color: #ffffff;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: .8rem;
    margin-bottom: 10px;
}

.back-btn:hover {
    background: #ffffff;
    color: #0b4d26;
}

.back-outside {
    border: 1.5px solid #0b4d26;
    color: #0b4d26;
    background: transparent;
}

.back-outside:hover {
    background: #0b4d26;
    color: #ffffff;
}

.pagination-green .page-link {
    background-color: #198754;        
    color: #ffffff;
    border: none;
    margin: 0 6px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.pagination-green .page-link:hover {
    background-color: #157347;
    transform: translateY(-1px);
}

.pagination-green .page-item.active .page-link {
    background-color: #146c43;
    box-shadow: 0 0.25rem 0.75rem rgba(0, 0, 0, 0.15);
}

.pagination-green .page-item.disabled .page-link {
    background-color: #a3cfbb;
    color: #ffffff;
    opacity: 0.7;
    cursor: not-allowed;
}

.filter-token {
    display: inline-flex;
    align-items: center;
    background-color: #198754; /* bootstrap green */
    color: white;
    padding: 6px 10px;
    border-radius: 999px;
    font-size: 0.85rem;
    margin: 4px 6px 4px 0;
}

.filter-token button {
    background: none;
    border: none;
    color: white;
    font-size: 1rem;
    margin-left: 6px;
    cursor: pointer;
    line-height: 1;
}

.filter-token button:hover {
    color: #ffd966;
}