/* ==========================================================================
   TOPICS, KEYWORDS & ABSTRACTS SECTION STYLES
   ========================================================================== */

/* -----------------------------------------------------------
   1. MAIN TOPICS GRID & CARDS
   ----------------------------------------------------------- */
.topics-modern-section h3 {
    margin: 1rem 0;
    color: var(--color-primary);
}

.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.2rem;
    max-width: 1000px;
    margin: 0 auto 2rem auto;
}

.topic-card {
    padding: 1.2rem;
    background: var(--color-secondary-bg);
    border-radius: var(--border-radius-md);
    box-shadow: var(--nav-bg-shadow);
    text-align: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

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

.topic-card img {
    display: block;
    width: auto;
    height: 4rem;
    margin: 1rem auto 0.5rem auto;
}

/* Nové definice pro formátování obsahu kartiček z PHP */
.topic-card h4 {
    margin: 0 0 10px 0;
    font-size: 1.2rem;
    text-shadow: var(--colored-shadow);
}

.topic-card p {
    margin: 0;
    color: var(--color-primary);
    font-weight: 700;
}

.topic-card p.topic-date {
    display: block;
    margin: 0 auto;
    text-align: center;
    /* Vynutí vnitřní zarovnání na střed podle šířky kontejneru */
    font-size: 0.9rem;
    color: #ffffff;
    font-weight: normal;
}

/* Obalení obsahu přímo v CSS (nebo přidáním divu v HTML) */
.topic-card h4,
.topic-card p.topic-date {
    background: rgba(212, 223, 224, 0.6);
    backdrop-filter: blur(4px);
    padding: 5px 15px;
    border-radius: 6px;
    display: inline-block;
    margin-bottom: 5px;
}


/* -----------------------------------------------------------
   2. KEYWORDS CARDS & LISTS
   ----------------------------------------------------------- */
.keywords-card {
    flex: 1 1 320px;
    margin: 2.5rem auto;
    padding: 1rem 2rem 2rem 2rem;
    background: var(--bg-white);
    border: none;
    border-radius: var(--border-radius-lg);
    box-shadow: 0 6px 32px 0 rgba(0, 0, 0, 0.10), 0 2px 8px 0 rgba(0, 0, 0, 0.04);
    transition: box-shadow 0.2s ease;
}

.keywords-card h4 {
    margin-bottom: 1.2rem;
    color: var(--color-primary);
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
}

.year-selector-card {
    margin-bottom: 1.5rem;
}

.conference-year-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    justify-content: center;
}

.conference-year-tab {
    padding: 0.6rem 1rem;
    background: var(--color-secondary-bg);
    border: 1px solid transparent;
    border-radius: var(--border-radius-md);
    color: var(--color-primary);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.conference-year-tab:hover {
    transform: translateY(-1px);
    box-shadow: var(--colored-shadow);
}

.conference-year-tab.is-active {
    background: var(--color-primary);
    color: #fff;
    box-shadow: var(--colored-shadow);
}

.topic-panel {
    margin-top: 1.25rem;
}

.keywords-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 0.75rem;
    justify-content: flex-start;
    margin: 0;
}

.keywords-list a.program-link {
    text-decoration: none;
}

.keywords-list span {
    padding: 0.5rem 0.75rem;
    background: var(--color-secondary-bg);
    color: var(--color-primary);
    font-size: 0.98rem;
    font-weight: 500;
    border-radius: var(--border-radius-md);
    box-shadow: 0 2px 8px 0 rgba(0, 0, 0, 0.04);
    transition: background-color 0.2s ease, color 0.2s ease;
}

/* -----------------------------------------------------------
   3. ABSTRACTS DATA TABLE
   ----------------------------------------------------------- */
.abstracts-separator {
    margin: 2rem 0 1.5rem 0;
    height: 3px;
    background-color: var(--color-primary);
    border: none;
    opacity: 0.8;
}

.abstracts-subtitle {
    margin-bottom: 0 !important;
    margin-left: 0.75rem;
    color: var(--color-primary) !important;
    font-size: 1.1rem !important;
    text-align: left !important;
}

.abstracts-table-wrapper {
    overflow-x: auto;
    margin: 0 -10px;
    padding: 10px;
}

.abstracts-table {
    width: 100%;
    background: var(--bg-white);
    border-collapse: separate;
    border-spacing: 0;
    border-radius: 18px;
    box-shadow: 0 4px 24px 0 rgba(0, 0, 0, 0.07), 0 1.5px 4px 0 rgba(0, 0, 0, 0.03);
    font-size: 0.95rem;
    text-align: left;
    overflow: hidden;
    table-layout: fixed;
    /* Nutné pro správné fungování max-width a text-overflow u buněk tabulky */
}

.abstracts-table th {
    padding: 0.375rem 0.5rem;
    background: var(--color-secondary-bg);
    color: var(--color-primary);
    font-weight: 600;
    white-space: nowrap;
    border-bottom: 2px solid var(--color-secondary-bg);
}

.abstracts-table th.col-name {
    width: 40%;
}

.abstracts-table th.col-institution {
    width: 60%;
}

.abstracts-table td {
    padding: 0.375rem 0.5rem;
    color: var(--color-text-main);
    vertical-align: middle;
    border-bottom: 1px solid var(--border-color);
}

.abstracts-table td:first-child,
.abstracts-table td:nth-child(2) {
    font-weight: 600;
}

.abstracts-table tr:last-child td {
    border-bottom: none;
}

.abstracts-table tbody tr {
    transition: background-color 0.15s ease;
}

.abstracts-table tbody tr:hover {
    background-color: var(--table-row-hover);
}

.abstracts-table td.truncate-title {
    max-width: 250px;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    cursor: help;
}

.abstracts-table td.empty-tutors {
    text-align: center;
}

.poster-tag {
    margin-left: 6px;
    color: var(--color-text-light);
    font-size: 0.85em;
}

.empty-msg {
    padding: 1rem !important;
    color: var(--color-text-light);
    text-align: center;
}

.show-more-container {
    margin: 0.5rem 0 1.5rem 0;
    text-align: center;
}

.btn-show-more {
    padding: 0.4rem 1.2rem;
    background: none;
    border: 2px solid var(--color-primary);
    border-radius: var(--border-radius-md);
    color: var(--color-primary);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-show-more:hover {
    background-color: var(--color-secondary-bg);
    transform: translateY(-1px);
}

/* -----------------------------------------------------------
   4. FULLSCREEN DOCUMENT LIGHTBOX
   ----------------------------------------------------------- */
#abstract-lightbox {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 10000;
    display: none;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    align-items: center;
    justify-content: center;
}

#abstract-lightbox-content {
    position: relative;
    width: 90vw;
    max-width: 850px;
    height: 92vh;
    background: #fff;
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.8);
}

#abstract-lightbox-loader {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #666;
    font-family: sans-serif;
    font-size: 1.2rem;
    z-index: 1;
}

#abstract-lightbox-iframe {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 2;
    width: 100%;
    height: 100%;
    border: none;
}

/* Lightbox Controls */
.lightbox-btn {
    position: absolute;
    z-index: 10001;
    background: none;
    border: none;
    color: #fff;
    line-height: 1;
    cursor: pointer;
    transition: transform 0.15s ease;
}

.lightbox-btn:hover {
    transform: scale(1.1);
}

#abstract-lightbox-close {
    top: 20px;
    right: 30px;
    padding: 0;
    font-size: 3rem;
}

#abstract-lightbox-prev,
#abstract-lightbox-next {
    top: 50%;
    transform: translateY(-50%);
    display: none;
    padding: 1rem;
    font-size: 2.5rem;
}

#abstract-lightbox-prev {
    left: 2vw;
}

#abstract-lightbox-next {
    right: 2vw;
}

#abstract-lightbox-prev:hover,
#abstract-lightbox-next:hover {
    transform: translateY(-50%) scale(1.1);
}

/* Efekty pro tlačítka fotogalerie */
#photo-lightbox button {
    transition: transform 0.15s ease, text-shadow 0.15s ease;
    text-shadow: 0 0 10px rgba(0, 0, 0, 0.8);
}

#photo-lightbox button:hover {
    transform: translateY(-50%) scale(1.1);
}

#photo-lightbox-close:hover {
    transform: scale(1.1);
}

/* -----------------------------------------------------------
   5. RESPONSIVE DESIGN (MEDIA QUERIES)
   ----------------------------------------------------------- */

@media (max-width: 1000px) {
    .keywords-card {
        min-width: 180px;
        max-width: 100%;
        padding: 1.1rem 0.6rem 0.75rem 0.6rem;
    }

    .keywords-list span {
        padding: 0.25rem 0.5rem;
        font-size: 0.93rem;
    }

    .abstracts-table th,
    .abstracts-table td {
        padding: 0.6rem 0.5rem;
        font-size: 0.88rem;
    }

    .abstracts-table td.truncate-title {
        max-width: 140px;
    }

    #abstract-lightbox-content {
        width: 100vw;
        height: 100vh;
        max-width: none;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .lightbox-btn {
        color: #222;
        text-shadow: 0 0 8px rgba(255, 255, 255, 0.9), 0 0 3px rgba(255, 255, 255, 1);
    }

    #abstract-lightbox-close {
        top: 10px;
        right: 15px;
        font-size: 2.5rem;
    }

    #abstract-lightbox-prev,
    #abstract-lightbox-next {
        font-size: 2rem;
        padding: 1rem 1.2rem;
    }

    #abstract-lightbox-prev {
        left: 0;
    }

    #abstract-lightbox-next {
        right: 0;
    }
}

@media (max-width: 630px) {
    #abstract-lightbox {
        align-items: flex-start;
        overflow-y: auto;
        overflow-x: hidden;
        overscroll-behavior: contain;
        padding-top: 10vh;
        padding-bottom: 2rem;
    }

    #abstract-lightbox-content {
        width: 630px;
        height: 890px;
        max-width: none;
        transform: scale(calc(94vw / 630));
        transform-origin: top center;
        margin: 0 auto;
        border-radius: 8px;
        margin-bottom: calc(890px * (94vw / 630) - 890px);
    }

    #abstract-lightbox-iframe {
        min-width: 630px;
    }

    .lightbox-btn {
        position: fixed;
    }

    #abstract-lightbox-close {
        top: 10px;
        right: 15px;
        font-size: 2.5rem;
    }
}

@media (max-width: 400px) {
    .keywords-card {
        padding: 1rem 0.25rem 0.75rem 0.25rem;
    }

    .abstracts-table th,
    .abstracts-table td {
        padding: 0.18rem 0.25rem;
        font-size: 0.8rem;
    }

    .abstracts-table td.truncate-title {
        max-width: 90px;
    }
}