:root {
    --tl-accent: #95a5ff;
    --tl-dot: #ffffff;
    --tl-dot-border: #5c6bc0;
    --tl-line: #3a3a5c;
    --tl-text: #e5e7eb;
    --tl-muted: #9ca3af;
    --tl-bg: #2f369c;
    --tl-card-bg: #212529;
    --tl-card-border: #2d2d3a;
    --tl-card-border-hover: #2d2d3a;
    --tl-radius: 10px;
    --tl-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
    --tl-line-width: 2px;
    --tl-dot-size: 14px;
}

/* static/css/timeline.css */
.timeline {
    max-width: 860px;
    margin: 2rem auto;
    padding: 0 1rem;
    color: var(--tl-text);
    background: var(--tl-bg);
    border-radius: 16px;
    padding: 2.5rem 1.5rem;
}

.timeline__title {
    text-align: center;
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--tl-muted);
    margin-bottom: 2.5rem;
}

/* ── Central track ── */
.timeline__track {
    position: relative;
    max-width: 800px;
    padding: 0.5rem 5px 1rem 0;
}

/* The vertical line */
.timeline__track::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: var(--tl-line-width);
    background: var(--tl-line);
    transform: translateX(-50%);
}

/* ── Day group ── */
.timeline__day {
    position: relative;
    margin-bottom: 0.5rem;
}

/* Day label sits centred on the line */
.timeline__day-header {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 0.25rem;
    z-index: 1;
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
}

.timeline__day-label {
    background: var(--tl-bg);
    border-radius: 1.5rem;
    padding: 0.3rem 1.5rem;
    text-align: center;
    line-height: 1;
}

.timeline__day-name {
    display: block;
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--tl-text);
    letter-spacing: -0.02em;
}

.timeline__day-date {
    display: block;
    font-size: 0.8rem;
    color: var(--tl-muted);
    margin-top: 0.1rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* ── Activity rows — alternate left/right ── */
.timeline__activities {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.timeline__activity {
    position: relative;
    display: grid;
    /* left content | gutter | right content */
    grid-template-columns: 1fr 3rem 1fr;
    align-items: center;
    min-height: 2.5rem;
    padding-top: 0.3rem;
    padding-bottom: 0.3rem;
}

/* The dot on the line */
.timeline__activity::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: var(--tl-dot-size);
    height: var(--tl-dot-size);
    border-radius: 50%;
    background: var(--tl-dot);
    border: 3px solid var(--tl-dot-border);
    box-shadow: 0 0 0 4px var(--tl-bg);
    z-index: 2;
    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease;
}

.timeline__activity:hover::before {
    transform: translate(-50%, -50%) scale(1.3);
    box-shadow:
        0 0 0 6px var(--tl-bg),
        0 0 12px var(--tl-accent);
}

/* Card shared styles */
.timeline__card {
    background: var(--tl-card-bg);
    border: 1px solid var(--tl-card-border);
    border-radius: var(--tl-radius);
    padding: 0.7rem 1rem;
    box-shadow: var(--tl-shadow);
    transition:
        border-color 0.2s ease,
        transform 0.2s ease;
    min-width: 0; /* prevent grid blowout */
}

.timeline__activity:hover .timeline__card {
    border-color: var(--tl-card-border-hover);
    transform: translateY(-2px);
}

/* Odd items: card on LEFT, empty on right */
.timeline__activity:nth-child(odd) .timeline__card {
    grid-column: 1;
    grid-row: 1;
    text-align: right;
}

.timeline__activity:nth-child(odd) .timeline__spacer {
    grid-column: 3;
    grid-row: 1;
}

/* Even items: empty on left, card on RIGHT */
.timeline__activity:nth-child(even) .timeline__spacer {
    grid-column: 1;
    grid-row: 1;
}

.timeline__activity:nth-child(even) .timeline__card {
    grid-column: 3;
    grid-row: 1;
    text-align: left;
}

/* Card internals */
.timeline__card-header {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin-bottom: 0.2rem;
}

.timeline__activity:nth-child(odd) .timeline__card-header {
    justify-content: flex-end;
}

.timeline__activity-time {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--tl-accent);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
    background: color-mix(in srgb, var(--tl-accent) 15%, transparent);
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
}

.timeline__activity-name {
    font-size: 0.88rem;
    line-height: 1.4;
    color: var(--tl-text);
    margin: 0;
}

.timeline__activity-name a {
    color: inherit;
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition:
        border-color 0.15s,
        color 0.15s;
}

.timeline__activity-name a:hover {
    color: var(--tl-accent);
    border-bottom-color: var(--tl-accent);
}

/* ── Footer note ── */
.timeline__note {
    text-align: center;
    font-size: 0.8rem;
    margin-top: 1.5rem;
}

/* ── Light mode override ── */
@media (prefers-color-scheme: light) {
    .timeline {
        --tl-dot: #5c6bc0;
        --tl-dot-border: #5c6bc0;
        --tl-line: #d1d5db;
        --tl-text: #1a1a2e;
        --tl-muted: #6b7280;
        --tl-bg: #f3f4f6;
        --tl-card-bg: #ffffff;
        --tl-card-border: #e5e7eb;
        --tl-shadow: 0 2px 12px rgba(0, 0, 0, 0.07);
    }
}

/* ── Mobile: collapse to single column ── */
@media (max-width: 600px) {
    .timeline__track::before {
        left: 1.1rem;
    }

    .timeline__activity {
        grid-template-columns: 2.2rem 1fr;
        grid-template-rows: 1fr;
    }

    .timeline__activity::before {
        left: 1.1rem;
        top: 50%;
    }

    /* All cards go to column 2, spacers hidden */
    .timeline__activity:nth-child(odd) .timeline__card,
    .timeline__activity:nth-child(even) .timeline__card {
        grid-column: 2;
        grid-row: 1;
        text-align: left;
    }

    .timeline__activity:nth-child(odd) .timeline__card-header {
        justify-content: flex-start;
    }

    .timeline__spacer {
        display: none;
    }

    .timeline__day-name {
        font-size: 1.2rem;
    }
}