:root {
    --si-primary: #1a3a6b;
    --si-primary-light: #2a5298;
    --si-primary-dark: #0f2548;
    --si-accent: #f59e0b;
    --si-accent-hover: #d97706;
    --si-success: #10b981;
    --si-light: #f8fafc;
    --si-dark: #0f172a;
    --si-gray-100: #f1f5f9;
    --si-gray-200: #e2e8f0;
    --si-gray-300: #cbd5e1;
    --si-gray-500: #64748b;
    --si-gray-700: #334155;
    --si-gray-900: #0f172a;
    --si-body-font: 'Poppins', sans-serif;
    --si-heading-font: 'Montserrat', sans-serif;
    --si-title-font: 'Montserrat', sans-serif;
    --si-radius: 1rem;
    --si-radius-sm: 0.5rem;
    --si-radius-lg: 1.5rem;
    --si-shadow-sm: 0 1px 3px rgba(0,0,0,.08);
    --si-shadow: 0 4px 24px rgba(0,0,0,.08);
    --si-shadow-lg: 0 12px 48px rgba(0,0,0,.12);
    --si-transition: all .3s cubic-bezier(.4,0,.2,1);
    --gradient-start: #d0d0ff; /* Light gray */
    --gradient-end: #e9ecef; /* Slightly darker gray */
}

.hr-line-dashed {
    /* border-top: 1px dashed #e7eaec;*/
    border: 1px dashed #4a5b81;
    color: #ffffff;
    height: 1px;
    margin: 20px 0;
}

.hr-line-solid {
    border-bottom: 1px solid #e7eaec;
    background-color: rgba(0, 0, 0, 0);
    border-style: solid !important;
    margin-top: 15px;
    margin-bottom: 15px;
}

.responsive-book-search-input {
    width: 100%;
}

.responsive-search-input {
    width: 100%; /* Mobile default */
}

.avatar-book {
    height: 5rem;
    width: 5rem
}

.avatar-user-role {
    height: 130px;
}

.card-top-img {
    background-image: url(../images/support/top.jpg);
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover
}

@media (min-width: 480px) {
    .topbar-search {
        width: 180px;
        padding: .4532rem .77rem;
    }
}

@media (min-width: 768px) { /* Tablet */
    .responsive-search-input {
        width: 250px;
        font-weight: 500;
    }

    .responsive-book-search-input {
        width: 300px;
        font-weight: 500;
    }

    .avatar-book {
        height: 5.5rem;
        width: 5.5rem
    }

    .avatar-user-role {
        height: 150px;
    }

    .topbar-search {
        width: 250px;
        padding: .4532rem .77rem;
    }
}

@media (min-width: 992px) { /* Desktop */
    .responsive-search-input {
        width: 300px;
        font-weight: 500;
    }

    .responsive-book-search-input {
        width: 600px;
        font-weight: 500;
    }

    .avatar-book {
        height: 6rem;
        width: 6rem
    }

    .avatar-user-role {
        height: 170px;
    }

    .topbar-search {
        width: 400px;
        padding: .4532rem .77rem;
    }
}



/* Dark mode: Dark gradient (from #343a40 to #212529) */
[data-bs-theme="dark"] {
    --gradient-start: #343a40; /* Dark gray */
    --gradient-end: #212529; /* Near-black */
}

/* Apply to body (overrides Flylibs white bg) */
/*body {
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    min-height: 100vh;
}*/

/* Ensure login wrapper/form contrasts well */
.wrapper.content { /* Common FLYLIB class for auth pages */
    background: transparent !important; /* Let gradient show through */
}

/* ---------- Event Gallery ---------- */
.si-gallery-filters {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    justify-content: center;
}

.si-filter-btn {
    background: var(--si-gray-100);
    color: var(--si-gray-700);
    border: 1px solid var(--si-gray-200);
    border-radius: 50px;
    padding: .35rem 1.25rem;
    font-size: .85rem;
    font-weight: 500;
    transition: var(--si-transition);
}

    .si-filter-btn:hover,
    .si-filter-btn.active {
        background: var(--si-primary);
        color: #fff;
        border-color: var(--si-primary);
    }

.si-event-card {
    border-radius: var(--si-radius);
    overflow: hidden;
    box-shadow: var(--si-shadow-sm);
    transition: var(--si-transition);
    background: #fff;
    height: 100%;
    position: relative;
}

    .si-event-card:hover {
        box-shadow: var(--si-shadow-lg);
        transform: translateY(-4px);
    }

    .si-event-card .si-event-img-wrap {
        position: relative;
        overflow: hidden;
    }

    .si-event-card img {
        width: 100%;
        height: 220px;
        object-fit: cover;
        transition: var(--si-transition);
        display: block;
    }

    .si-event-card:hover img {
        transform: scale(1.05);
    }

    .si-event-card .si-event-overlay {
        position: absolute;
        inset: 0;
        background: rgba(10,22,40,.6);
        display: flex;
        align-items: center;
        justify-content: center;
        opacity: 0;
        transition: var(--si-transition);
    }

    .si-event-card:hover .si-event-overlay {
        opacity: 1;
    }

.si-event-view-btn {
    display: inline-block;
    padding: .5rem 1.5rem;
    font-size: .8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: #fff;
    background: var(--si-accent);
    border: none;
    border-radius: 50px;
    text-decoration: none;
    transition: var(--si-transition);
    cursor: pointer;
}

    .si-event-view-btn:hover {
        background: var(--si-accent-hover);
        color: #fff;
        transform: scale(1.05);
    }

.si-event-card-body {
    padding: 1rem 1.25rem;
}

    .si-event-card-body h5 {
        font-family: var(--si-heading-font);
        font-size: .95rem;
        font-weight: 600;
        color: var(--si-dark);
        margin-bottom: .25rem;
    }

    .si-event-card-body small {
        color: var(--si-gray-500);
        font-size: .8rem;
    }

/* Photo count badge on thumbnail */
.si-event-count-badge {
    position: absolute;
    top: .6rem;
    right: .6rem;
    background: rgba(10,22,40,.72);
    color: #fff;
    font-size: .72rem;
    font-weight: 600;
    padding: .25rem .6rem;
    border-radius: 50px;
    backdrop-filter: blur(4px);
    z-index: 2;
    pointer-events: none;
}
/* Gallery grid images */
.si-event-detail-gallery {
    margin-top: 1rem;
}

.si-detail-img-wrap {
    position: relative;
    overflow: hidden;
    border-radius: var(--si-radius);
    cursor: zoom-in;
    aspect-ratio: 4 / 3;
    background: var(--si-gray-100);
}

    .si-detail-img-wrap img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform .4s ease;
        display: block;
    }

    .si-detail-img-wrap:hover img {
        transform: scale(1.06);
    }

.si-detail-img-overlay {
    position: absolute;
    inset: 0;
    background: rgba(10,22,40,.45);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity .3s ease;
    color: #fff;
    font-size: 1.4rem;
}

.si-detail-img-wrap:hover .si-detail-img-overlay {
    opacity: 1;
}

/* Lightbox */
.si-lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.93);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity .25s ease;
}

    .si-lightbox.active {
        opacity: 1;
        pointer-events: all;
    }

.si-lightbox-inner {
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

    .si-lightbox-inner img {
        max-width: 90vw;
        max-height: 80vh;
        object-fit: contain;
        border-radius: var(--si-radius);
        box-shadow: 0 8px 40px rgba(0,0,0,.6);
    }

.si-lightbox-caption {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: .75rem .25rem 0;
    color: rgba(255,255,255,.8);
    font-size: .85rem;
    gap: 1rem;
}

.si-lightbox-close {
    position: fixed;
    top: 1.25rem;
    right: 1.5rem;
    background: rgba(255,255,255,.1);
    border: none;
    color: #fff;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background .2s;
    z-index: 10000;
}

    .si-lightbox-close:hover {
        background: rgba(255,255,255,.2);
    }

.si-lightbox-nav {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,.1);
    border: none;
    color: #fff;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background .2s;
    z-index: 10000;
}

    .si-lightbox-nav:hover {
        background: rgba(255,255,255,.22);
    }

.si-lb-prev {
    left: 1.25rem;
}

.si-lb-next {
    right: 1.25rem;
}

@media (max-width: 575px) {
    .si-event-detail-header {
        padding: 1.5rem;
    }

    .si-event-detail-meta {
        align-items: flex-start;
        margin-top: 1rem;
    }

    .si-lb-prev {
        left: .5rem;
    }

    .si-lb-next {
        right: .5rem;
    }
}