/* Programme Page Styles */

.programme-section {
    background: var(--background-color);
    padding: 4rem 0;
}

.programme-intro {
    max-width: 800px;
    margin: 0 auto 3rem;
    text-align: center;
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-primary);
}

/* Timeline Container */
.timeline {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

/* Session Headers */
.session-header {
    margin: 3rem 0 2rem;
}

.session-header h2 {
    color: var(--primary-color);
    font-size: 1.75rem;
    text-align: center;
    position: relative;
}

.session-header h2:before {
    content: "";
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: -10px;
    width: 60px;
    height: 3px;
    background: var(--secondary-color);
}

.session-header:first-child {
    margin-top: 0;
}

/* Timeline Item */
.timeline-item {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
    position: relative;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

/* Time Marker */
.time-marker {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    padding-top: 1.5rem;
    position: relative;
}

.time-start {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
}

.time-end {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* Vertical line connecting times */
.timeline-item:not(:last-child) .time-marker:after {
    content: "";
    position: absolute;
    right: -1rem;
    top: 2rem;
    width: 2px;
    height: calc(100% + 2rem);
    background: var(--border-color);
}

/* Dot on timeline */
.time-marker:before {
    content: "";
    position: absolute;
    right: -1.375rem;
    top: 1.75rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--secondary-color);
    border: 3px solid var(--background-color);
    z-index: 1;
}

/* Session Card */
.session-card {
    background: var(--white);
    padding: 1.5rem 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    border-left: 4px solid var(--secondary-color);
    transition: all 0.3s;
}

.session-card:hover {
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transform: translateX(5px);
}

.session-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.session-duration {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.session-description {
    margin: 1rem 0 0;
    line-height: 1.6;
    color: var(--text-primary);
}

/* Session Types */
.session-keynote {
    border-left-color: #f05537;
}

.session-workshop {
    border-left-color: #2d8094;
}

.session-break {
    background: var(--background-color);
    border-left-color: #ccc;
}

.session-break .session-title {
    color: var(--text-secondary);
}

/* Panel Discussion - Featured */
.session-panel {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--primary-color) 100%);
    color: var(--white);
    border-left: none;
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.session-panel .session-title {
    color: var(--white);
    font-size: 1.375rem;
}

.session-panel .session-duration,
.session-panel .session-description {
    color: var(--white);
    opacity: 0.95;
}

.session-panel:hover {
    box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}

.panelists-preview {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255,255,255,0.2);
}

.panelists-preview strong {
    color: var(--white);
    font-size: 1rem;
}

.panelists-preview ul {
    list-style: none;
    padding: 0;
    margin: 0.75rem 0 0;
}

.panelists-preview li {
    padding: 0.25rem 0 0.25rem 1.5rem;
    position: relative;
    color: var(--white);
    opacity: 0.95;
}

.panelists-preview li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--white);
}

.session-link {
    display: inline-block;
    margin-top: 1rem;
    color: var(--white);
    text-decoration: none;
    font-weight: 600;
    padding: 0.5rem 1rem;
    background: rgba(255,255,255,0.2);
    border-radius: 5px;
    transition: all 0.3s;
}

.session-link:hover {
    background: var(--white);
    color: var(--primary-color);
}

/* Expandable Session Details */
.session-details {
    margin-top: 1rem;
}

.session-details summary {
    cursor: pointer;
    color: var(--secondary-color);
    font-weight: 600;
    padding: 0.75rem 1rem;
    background: var(--background-color);
    border-radius: 5px;
    list-style: none;
    user-select: none;
    transition: all 0.3s;
}

.session-details summary::-webkit-details-marker {
    display: none;
}

.session-details summary:hover {
    background: var(--secondary-color);
    color: var(--white);
}

.session-details summary:after {
    content: " ▼";
    font-size: 0.75rem;
}

.session-details[open] summary:after {
    content: " ▲";
}

/* Abstracts List */
.abstracts-list {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.abstract-item {
    padding: 1.5rem;
    background: var(--background-color);
    border-radius: 5px;
    margin-bottom: 1rem;
}

.abstract-item:last-child {
    margin-bottom: 0;
}

.abstract-item h4 {
    color: var(--primary-color);
    font-size: 1rem;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.abstract-authors {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.abstract-affiliation {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: 0.75rem;
}

.abstract-summary {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-primary);
}

.abstract-note {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* Responsive Design */
@media (max-width: 768px) {
    .timeline-item {
        grid-template-columns: 80px 1fr;
        gap: 1rem;
    }

    .time-marker {
        align-items: flex-start;
    }

    .time-start {
        font-size: 1rem;
    }

    .time-end {
        font-size: 0.75rem;
    }

    .time-marker:before {
        right: auto;
        left: 100%;
        margin-left: 0.5rem;
    }

    .timeline-item:not(:last-child) .time-marker:after {
        right: auto;
        left: calc(100% + 0.5rem);
    }

    .session-card {
        padding: 1rem 1.25rem;
    }

    .session-title {
        font-size: 1.125rem;
    }

    .session-panel .session-title {
        font-size: 1.25rem;
    }

    .panelists-preview {
        font-size: 0.9rem;
    }

    .session-header h2 {
        font-size: 1.5rem;
    }
}