.activity-main {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
}
.activity-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 2rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}
.activity-header h1 { margin: 0 0 0.25rem; font-size: 2rem; letter-spacing: -0.02em; }
.activity-summary { margin: 0; color: var(--muted, #64748b); font-size: 0.9rem; }
.activity-filters {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    flex-wrap: wrap;
}
.activity-filters select, .activity-filters input {
    padding: 0.4rem 0.6rem;
    border: 1px solid var(--border, #e2e8f0);
    border-radius: 6px;
    font-size: 0.9rem;
    background: white;
}
.activity-filters input[type="search"] { min-width: 180px; }

.activity-timeline { display: flex; flex-direction: column; }

.activity-day-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--muted, #64748b);
    padding: 1rem 0 0.5rem;
    border-bottom: 1px solid var(--border, #e2e8f0);
    margin-bottom: 0.5rem;
}

.activity-item {
    display: flex;
    gap: 0.75rem;
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--border, #f1f5f9);
    align-items: flex-start;
}
.activity-item:last-child { border-bottom: none; }

.ai-icon {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
    margin-top: 0.1rem;
}
.ai-icon.workitem  { background: #2563eb; }
.ai-icon.risk      { background: #ea580c; }
.ai-icon.gate      { background: #7c3aed; }
.ai-icon.intake    { background: #0891b2; }
.ai-icon.project   { background: #16a34a; }

.ai-body { flex: 1; min-width: 0; }
.ai-title {
    font-size: 0.9rem;
    line-height: 1.4;
}
.ai-title a {
    color: var(--primary, #2563eb);
    text-decoration: none;
    font-weight: 500;
}
.ai-title a:hover { text-decoration: underline; }
.ai-meta {
    display: flex;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--muted, #94a3b8);
    margin-top: 0.15rem;
    flex-wrap: wrap;
}

.ai-time {
    font-size: 0.75rem;
    color: var(--muted, #94a3b8);
    white-space: nowrap;
    flex-shrink: 0;
    margin-top: 0.15rem;
}