diff --git a/modules/rcal/components/folk-calendar-view.ts b/modules/rcal/components/folk-calendar-view.ts
index 34299f7d..5172ed54 100644
--- a/modules/rcal/components/folk-calendar-view.ts
+++ b/modules/rcal/components/folk-calendar-view.ts
@@ -1689,11 +1689,12 @@ class FolkCalendarView extends HTMLElement {
 		}
 
 		// Compute row assignments for overlapping horizontal events
+		const MIN_DH_INTERVAL = Math.ceil(60 / HOUR_WIDTH * 60); // min display width (60px) → min interval
 		const dhIntervals = timed.map(ev => {
 			const s = new Date(ev.start_time), e = new Date(ev.end_time);
 			const startMin = s.getHours() * 60 + s.getMinutes();
 			const endMin = e.getHours() * 60 + e.getMinutes();
-			return { startMin, endMin: Math.max(endMin, startMin + 30) };
+			return { startMin, endMin: Math.max(endMin, startMin + MIN_DH_INTERVAL) };
 		});
 		const dhLayout = this.computeEventColumns(dhIntervals);
 		const DH_ROW_HEIGHT = 56; // min-height 48 + 8px gap
@@ -2152,7 +2153,9 @@ class FolkCalendarView extends HTMLElement {
 			}
 		}
 
-		let eventsOverlay = "";
+		// Build per-day event overlays (grid-aligned to avoid calc() rounding vs 1fr drift)
+		const MIN_INTERVAL_WEEK = Math.ceil(18 / HOUR_HEIGHT * 60); // min display height → min interval
+		const dayOverlays: string[] = [];
 		for (let i = 0; i < 7; i++) {
 			const ds = this.dateStr(days[i]);
 			const dayTimed = this.getEventsForDate(ds).filter(ev => {
@@ -2160,15 +2163,15 @@ class FolkCalendarView extends HTMLElement {
 				return (en.getTime() - s.getTime()) < 86400000;
 			}).sort((a, b) => a.start_time.localeCompare(b.start_time));
 
-			// Compute sub-columns for overlapping events within this day
 			const intervals = dayTimed.map(ev => {
 				const s = new Date(ev.start_time), e = new Date(ev.end_time);
 				const startMin = s.getHours() * 60 + s.getMinutes();
 				const endMin = e.getHours() * 60 + e.getMinutes();
-				return { startMin, endMin: Math.max(endMin, startMin + 20) };
+				return { startMin, endMin: Math.max(endMin, startMin + MIN_INTERVAL_WEEK) };
 			});
 			const dayLayout = this.computeEventColumns(intervals);
 
+			let dayHtml = "";
 			for (let j = 0; j < dayTimed.length; j++) {
 				const ev = dayTimed[j];
 				const { startMin, endMin } = intervals[j];
@@ -2177,21 +2180,28 @@ class FolkCalendarView extends HTMLElement {
 				const topPx = ((startMin - START_HOUR * 60) / 60) * HOUR_HEIGHT;
 				const heightPx = Math.max((duration / 60) * HOUR_HEIGHT, 18);
 				const es = this.getEventStyles(ev);
-				const colLeft = `calc(44px + ${i} * ((100% - 44px) / 7) + 2px + ${col} * ((100% - 44px) / 7 - 4px) / ${totalCols})`;
-				const colWidth = `calc(((100% - 44px) / 7 - 4px) / ${totalCols} - 1px)`;
+				const evLeft = totalCols > 1 ? `calc(${(col / totalCols * 100).toFixed(2)}% + 1px)` : "1px";
+				const evWidth = totalCols > 1 ? `calc(${(100 / totalCols).toFixed(2)}% - 2px)` : "calc(100% - 2px)";
 				const showMeta = heightPx >= 36;
 				const timeStr = `${this.formatTime(ev.start_time)}\u2013${this.formatTime(ev.end_time)}`;
 				const locName = ev.location_name ? this.esc(ev.location_name) : "";
 				const virtualBadge = ev.is_virtual ? `<span class="wk-virtual" title="Virtual">\u{1F4BB}</span>` : "";
-				eventsOverlay += `<div class="week-event" data-event-id="${ev.id}" style="
-					top:${topPx}px;height:${heightPx}px;left:${colLeft};width:${colWidth};
+				dayHtml += `<div class="week-event" data-event-id="${ev.id}" style="
+					top:${topPx}px;height:${heightPx}px;left:${evLeft};width:${evWidth};
 					background:${es.bgColor};border-left-color:${ev.source_color || "#6366f1"};border-left-style:${es.borderStyle};opacity:${es.opacity}">
 					<div class="week-event-title">${virtualBadge}${this.esc(ev.title)}</div>
 					${showMeta ? `<div class="week-event-meta"><span class="week-event-time">${timeStr}</span>${locName ? `<span class="week-event-loc">${locName}</span>` : ""}</div>` : ""}
 				</div>`;
 			}
+			dayOverlays.push(dayHtml);
 		}
 
+		// Grid-aligned overlay mirrors week-grid columns exactly (no calc drift)
+		const overlayDivs = dayOverlays.map(h =>
+			`<div style="position:relative;pointer-events:auto;">${h}</div>`
+		).join("");
+		const eventsOverlay = `<div style="position:absolute;inset:0;display:grid;grid-template-columns:44px repeat(7,1fr);pointer-events:none;"><div></div>${overlayDivs}</div>`;
+
 		let nowHtml = "";
 		const nowDay = days.findIndex(day => this.dateStr(day) === todayStr);
 		if (nowDay >= 0) {
@@ -2205,9 +2215,11 @@ class FolkCalendarView extends HTMLElement {
 		return `
 		<div class="week-view">
 			<div class="week-header">${headerHtml}</div>
-			<div style="position:relative;overflow-y:auto;max-height:600px;">
-				<div class="week-grid" style="position:relative;height:${totalHeight}px">${gridHtml}</div>
-				${eventsOverlay}${nowHtml}
+			<div style="overflow-y:auto;max-height:600px;">
+				<div style="position:relative;height:${totalHeight}px;">
+					<div class="week-grid" style="height:100%">${gridHtml}</div>
+					${eventsOverlay}${nowHtml}
+				</div>
 			</div>
 		</div>`;
 	}