body { font-family: system-ui, -apple-system, sans-serif; }
.tab-btn2.active { background: #fff; color: #4338ca; }
.tab-btn2:not(.active) { color: rgba(255,255,255,.8); }
.tab-btn2:not(.active):hover { background: rgba(255,255,255,.1); }
.subtab-btn.active { background: #fff; color: #4338ca; box-shadow: 0 1px 2px rgba(0,0,0,.06); }
.subtab-btn:not(.active) { color: #6b7280; }
.subtab-btn:not(.active):hover { background: rgba(255,255,255,.6); }
.week-row:hover { background: #fafafa; }
.chev { transition: transform .15s ease; }
.chev.open { transform: rotate(180deg); }