* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
    background: aliceblue;
    color: #1e293b;
}

.header {
    background: linear-gradient(135deg, #1e3a5f 0%, #2d5986 100%);
    padding: 16px 20px;
    text-align: center;
    border-bottom: 1px solid #1a3050;
}

.header h1 {
    font-size: 22px;
    margin-bottom: 4px;
    color: white;
}

.header p {
    font-size: 13px;
    color: #bfdbfe;
}

/* Nation filter buttons */
.controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: #e0f2fe;
    flex-wrap: wrap;
}

.controls label {
    font-size: 13px;
    font-weight: 600;
    color: #475569;
    margin-right: 4px;
}

.filter-btn {
    padding: 7px 14px;
    border: 2px solid transparent;
    border-radius: 20px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    color: white;
    transition: all 0.2s ease;
}

.filter-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.filter-btn.active {
    box-shadow: 0 0 0 3px rgba(255,255,255,0.6), 0 0 0 5px currentColor;
}

.filter-btn.all       { background: #64748b; }
.filter-btn.portugal  { background: #007832; }
.filter-btn.spain     { background: #c81e1e; }
.filter-btn.england   { background: #641414; }
.filter-btn.france    { background: #1e50b4; }
.filter-btn.netherlands { background: #e67800; }

/* Navigation controls */
.nav-controls {
    display: flex;
    justify-content: center;
    gap: 8px;
    padding: 8px;
    background: #e0f2fe;
    border-bottom: 1px solid #bae6fd;
}

.nav-btn {
    padding: 5px 12px;
    border: 1px solid #94a3b8;
    border-radius: 6px;
    background: white;
    color: #475569;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s ease;
}

.nav-btn:hover {
    background: #f1f5f9;
    border-color: #3b82f6;
    color: #1e40af;
}

/* Timeline container */
#timeline {
    padding: 10px 80px;
    background: white;
    min-height: 380px;
    overflow: hidden;
}

/* vis-timeline overrides */
.vis-timeline {
    border: none !important;
    overflow: visible !important;
}

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

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

.vis-item {
    border-radius: 6px !important;
    font-size: 12px !important;
    font-weight: 500 !important;
    padding: 3px 8px !important;
}

.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.vis-selected {
    box-shadow: 0 0 0 3px #f59e0b !important;
    z-index: 10 !important;
}

.vis-time-axis .vis-text {
    color: #475569 !important;
    font-size: 12px !important;
}

.vis-time-axis .vis-grid.vis-minor {
    border-color: #e2e8f0 !important;
}

.vis-time-axis .vis-grid.vis-major {
    border-color: #cbd5e1 !important;
}

/* Tooltip */
.vis-tooltip {
    background: #1e293b !important;
    color: white !important;
    padding: 10px 14px !important;
    border-radius: 8px !important;
    font-size: 13px !important;
    max-width: 300px !important;
    line-height: 1.5 !important;
    word-wrap: break-word !important;
    overflow-wrap: break-word !important;
    white-space: normal !important;
    box-sizing: border-box !important;
    border: none !important;
    box-shadow: 0 4px 20px rgba(0,0,0,0.25) !important;
}

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

/* Instructions */
.instructions {
    text-align: center;
    padding: 8px;
    font-size: 12px;
    color: #64748b;
    background: #f8fafc;
    border-top: 1px solid #e2e8f0;
}

/* Info panel: legend + details */
.info-panel {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: 16px;
    padding: 16px;
    background: #e0f2fe;
    border-top: 1px solid #bae6fd;
}

.legend {
    padding: 14px;
    background: white;
    border-radius: 10px;
    border: 1px solid #e2e8f0;
}

.legend h3 {
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 10px;
    color: #1e40af;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 9px;
    margin-bottom: 7px;
    font-size: 13px;
    color: #334155;
}

.legend-color {
    width: 14px;
    height: 14px;
    border-radius: 4px;
    flex-shrink: 0;
}

.legend-color.portugal    { background: #007832; }
.legend-color.spain       { background: #c81e1e; }
.legend-color.england     { background: #641414; }
.legend-color.france      { background: #1e50b4; }
.legend-color.netherlands { background: #e67800; }

/* Event details panel */
.details {
    padding: 14px;
    background: white;
    border-radius: 10px;
    border: 1px solid #e2e8f0;
}

.details h3 {
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 10px;
    color: #1e40af;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

#event-details {
    font-size: 13px;
    line-height: 1.6;
    color: #64748b;
}

#event-details .event-title {
    font-size: 16px;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 4px;
}

#event-details .event-meta {
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

#event-details .event-year {
    color: #2563eb;
}

#event-details .event-nation-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 12px;
    color: white;
    font-size: 11px;
}

#event-details .event-description {
    margin-bottom: 10px;
    color: #334155;
    line-height: 1.65;
}

#event-details .event-context {
    font-style: italic;
    padding: 10px 12px;
    background: #f8fafc;
    border-radius: 6px;
    border-left: 3px solid #3b82f6;
    color: #64748b;
    line-height: 1.55;
}

@media (max-width: 700px) {
    .info-panel {
        grid-template-columns: 1fr;
    }

    #timeline {
        padding: 10px 16px;
    }

    .controls {
        gap: 5px;
    }

    .filter-btn {
        padding: 6px 10px;
        font-size: 12px;
    }
}