/* History of Documentation and Publishing Tools - vis-timeline layout */

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: Arial, Helvetica, sans-serif;
    background-color: aliceblue;
}

.container {
    width: 100%;
    padding: 10px 12px 14px 12px;
}

.title {
    font-size: 20px;
    font-weight: bold;
    color: #222;
    text-align: center;
    margin-bottom: 2px;
}

.subtitle {
    font-size: 13px;
    color: #555;
    text-align: center;
    margin-bottom: 10px;
}

/* ===========================================
   CATEGORY FILTER BUTTONS
   =========================================== */
.filter-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px;
    margin-bottom: 10px;
}

.filter-btn {
    padding: 6px 12px;
    font-size: 12px;
    font-weight: bold;
    border: 2px solid #999;
    border-radius: 16px;
    background-color: white;
    color: #444;
    cursor: pointer;
    transition: all 0.15s;
}

.filter-btn:hover {
    background-color: #eef4fb;
}

.filter-btn.active {
    color: white;
    border-color: transparent;
}

.filter-btn[data-category="all"].active { background-color: #444; }
.filter-btn[data-category="Early Publishing Tools"].active { background-color: #5c4033; }
.filter-btn[data-category="Markup Languages"].active { background-color: #2465a8; }
.filter-btn[data-category="Markdown Ecosystem"].active { background-color: #2e8b57; }
.filter-btn[data-category="Modern Doc-Site Generators"].active { background-color: #b8860b; }
.filter-btn[data-category="Rust & Zensical"].active { background-color: #b7410e; }

/* ===========================================
   TIMELINE CONTAINER
   =========================================== */
#timeline {
    width: 100%;
    background-color: white;
    border: 1px solid #ccc;
    border-radius: 6px;
    padding-left: 160px;
    padding-right: 160px;
    overflow: hidden;
}

.vis-timeline {
    overflow: visible !important;
}

.vis-panel.vis-center {
    overflow: visible !important;
}

.vis-item .vis-item-overflow {
    overflow: visible !important;
}

/* Ensure all item boxes fit their text */
.vis-item .vis-item-content {
    white-space: nowrap !important;
    padding: 4px 8px !important;
}
.vis-item.vis-range {
    min-width: fit-content !important;
}
.vis-item.vis-box {
    min-width: fit-content !important;
}

.vis-item {
    border-width: 2px !important;
    color: white !important;
    font-size: 12px !important;
    font-weight: bold !important;
}

.vis-item.ghost {
    opacity: 0 !important;
    pointer-events: none;
}

.cat-early { background-color: #5c4033 !important; border-color: #3e2b1f !important; }
.cat-markup { background-color: #2465a8 !important; border-color: #184a80 !important; }
.cat-markdown { background-color: #2e8b57 !important; border-color: #1f6140 !important; }
.cat-generators { background-color: #b8860b !important; border-color: #8a6608 !important; }
.cat-rust { background-color: #b7410e !important; border-color: #8a310a !important; }

.vis-tooltip {
    background: #2c3e50 !important;
    color: white !important;
    padding: 10px 15px !important;
    border-radius: 8px !important;
    font-size: 13px !important;
    max-width: 300px !important;
    line-height: 1.4 !important;
    word-wrap: break-word !important;
    overflow-wrap: break-word !important;
    white-space: normal !important;
    box-sizing: border-box !important;
}

.vis-tooltip div {
    max-width: 280px !important;
    word-wrap: break-word !important;
    overflow-wrap: break-word !important;
    white-space: normal !important;
}

/* ===========================================
   NAVIGATION CONTROLS
   =========================================== */
.nav-row {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin: 10px 0;
}

.nav-btn {
    padding: 6px 14px;
    font-size: 13px;
    font-weight: bold;
    border: none;
    border-radius: 6px;
    background-color: #2465a8;
    color: white;
    cursor: pointer;
}

.nav-btn:hover {
    background-color: #184a80;
}

/* ===========================================
   LEGEND
   =========================================== */
.legend {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
    margin-bottom: 10px;
}

.legend-item {
    display: flex;
    align-items: center;
    font-size: 12px;
    color: #333;
}

.legend-color {
    width: 14px;
    height: 14px;
    border-radius: 3px;
    margin-right: 5px;
    border: 1px solid rgba(0,0,0,0.25);
}

/* ===========================================
   INFO PANEL
   =========================================== */
.info-panel {
    background-color: white;
    border: 1px solid #ccc;
    border-radius: 6px;
    padding: 10px 14px;
    min-height: 70px;
}

.info-title {
    font-weight: bold;
    font-size: 14px;
    color: #222;
    margin-bottom: 4px;
}

.info-text {
    font-size: 13px;
    line-height: 1.5;
    color: #333;
}

.info-notes {
    font-size: 12px;
    line-height: 1.5;
    color: #555;
    font-style: italic;
    margin-top: 6px;
    padding-top: 6px;
    border-top: 1px dashed #ccc;
}

/* ===========================================
   RESPONSIVE STYLES
   =========================================== */
@media (max-width: 700px) {
    .title {
        font-size: 16px;
    }
    .filter-btn {
        font-size: 11px;
        padding: 5px 9px;
    }
    #timeline {
        padding-left: 40px;
        padding-right: 40px;
    }
}