diff --git a/internal/tui/tab_alerts.go b/internal/tui/tab_alerts.go
index 0ac4316..a8ba6a7 100644
--- a/internal/tui/tab_alerts.go
+++ b/internal/tui/tab_alerts.go
@@ -148,8 +148,26 @@ func (m Model) viewAlertsTab() string {
 		return "\n  No alert channels configured. Press [n] to add one."
 	}
 
+	maxName := 0
+	for _, a := range m.alerts {
+		if n := len([]rune(a.Name)); n > maxName {
+			maxName = n
+		}
+	}
+
+	cols := []colDef{
+		{"#", "#", 4, 4, false},
+		{"", "", 3, 3, false},
+		{"NAME", "NAME", 10, 20, false},
+		{"TYPE", "TYPE", 10, 12, false},
+		{"CONFIG", "CONFIG", 15, 40, true},
+		{"SENT", "LAST SENT", 8, 12, false},
+	}
+	headers, widths := m.computeTableLayout(cols, 0)
+	nameW := widths[2]
+
 	return m.renderTable(
-		[]string{"#", "", "NAME", "TYPE", "CONFIG", "LAST SENT"},
+		headers,
 		len(m.alerts),
 		func(start, end int) [][]string {
 			var rows [][]string
@@ -159,7 +177,7 @@ func (m Model) viewAlertsTab() string {
 				rows = append(rows, []string{
 					fmt.Sprintf("%d", i+1),
 					fmtAlertHealth(h),
-					m.zones.Mark(fmt.Sprintf("alert-%d", i), limitStr(a.Name, 15)),
+					m.zones.Mark(fmt.Sprintf("alert-%d", i), limitStr(a.Name, nameW-2)),
 					fmtAlertType(a.Type),
 					fmtAlertConfig(struct {
 						Type     string
@@ -170,7 +188,7 @@ func (m Model) viewAlertsTab() string {
 			}
 			return rows
 		},
-		nil, nil,
+		widths, nil,
 	)
 }
 
diff --git a/internal/tui/tab_maint.go b/internal/tui/tab_maint.go
index 68d6141..0c061ca 100644
--- a/internal/tui/tab_maint.go
+++ b/internal/tui/tab_maint.go
@@ -2,10 +2,11 @@ package tui
 
 import (
 	"fmt"
-	"gitea.lerkolabs.com/lerko/uptop/internal/models"
 	"strconv"
 	"time"
 
+	"gitea.lerkolabs.com/lerko/uptop/internal/models"
+
 	tea "github.com/charmbracelet/bubbletea"
 	"github.com/charmbracelet/huh"
 	"github.com/charmbracelet/lipgloss"
@@ -92,8 +93,20 @@ func (m Model) viewMaintTab() string {
 		return "\n  No maintenance windows or incidents. Press [n] to create one."
 	}
 
+	cols := []colDef{
+		{"#", "#", 4, 4, false},
+		{"TITLE", "TITLE", 12, 28, true},
+		{"TYPE", "TYPE", 10, 14, false},
+		{"MON", "MONITORS", 10, 20, false},
+		{"STATUS", "STATUS", 8, 12, false},
+		{"START", "STARTED", 10, 16, false},
+		{"ENDS", "ENDS", 10, 16, false},
+	}
+	headers, widths := m.computeTableLayout(cols, 0)
+	titleW := widths[1]
+
 	return m.renderTable(
-		[]string{"#", "TITLE", "TYPE", "MONITORS", "STATUS", "STARTED", "ENDS"},
+		headers,
 		len(m.maintenanceWindows),
 		func(start, end int) [][]string {
 			var rows [][]string
@@ -102,7 +115,7 @@ func (m Model) viewMaintTab() string {
 				mw := m.maintenanceWindows[i]
 				rows = append(rows, []string{
 					strconv.Itoa(i + 1),
-					m.zones.Mark(fmt.Sprintf("maint-%d", i), limitStr(mw.Title, 24)),
+					m.zones.Mark(fmt.Sprintf("maint-%d", i), limitStr(mw.Title, titleW-2)),
 					fmtMaintType(mw.Type),
 					fmtMaintMonitor(mw.MonitorID, allSites),
 					fmtMaintStatus(mw),
@@ -112,7 +125,7 @@ func (m Model) viewMaintTab() string {
 			}
 			return rows
 		},
-		[]int{6, 0, 14, 20, 12, 16, 16},
+		widths,
 		nil,
 	)
 }
diff --git a/internal/tui/tab_nodes.go b/internal/tui/tab_nodes.go
index a4a049c..6946e6d 100644
--- a/internal/tui/tab_nodes.go
+++ b/internal/tui/tab_nodes.go
@@ -10,16 +10,24 @@ func (m Model) viewNodesTab() string {
 		return "\n  No probe nodes connected."
 	}
 
-	colWidths := []int{0, 12, 20, 10, 8}
+	cols := []colDef{
+		{"NAME", "NAME", 12, 24, true},
+		{"REGION", "REGION", 8, 14, false},
+		{"SEEN", "LAST SEEN", 8, 20, false},
+		{"VER", "VERSION", 8, 12, false},
+		{"STATUS", "STATUS", 8, 10, false},
+	}
+	headers, widths := m.computeTableLayout(cols, 0)
+	nameW := widths[0]
 
 	return m.renderTable(
-		[]string{"NAME", "REGION", "LAST SEEN", "VERSION", "STATUS"},
+		headers,
 		len(m.nodes),
 		func(start, end int) [][]string {
 			var rows [][]string
 			for i := start; i < end; i++ {
 				node := m.nodes[i]
-				name := limitStr(node.Name, 20)
+				name := limitStr(node.Name, nameW-2)
 				if name == "" {
 					name = node.ID
 				}
@@ -37,7 +45,7 @@ func (m Model) viewNodesTab() string {
 			}
 			return rows
 		},
-		colWidths,
+		widths,
 		nil,
 	)
 }
diff --git a/internal/tui/tab_sites.go b/internal/tui/tab_sites.go
index 12787e7..fecba98 100644
--- a/internal/tui/tab_sites.go
+++ b/internal/tui/tab_sites.go
@@ -341,23 +341,16 @@ type tableLayout struct {
 }
 
 func (m Model) computeLayout() tableLayout {
-	type colDef struct {
-		short    string
-		full     string
-		minWidth int
-		maxWidth int
-	}
-
 	cols := []colDef{
-		{"#", "#", 4, 4},
-		{"", "", 0, 0}, // NAME (dynamic)
-		{"TYPE", "TYPE", 8, 10},
-		{"STATUS", "STATUS", 8, 10},
-		{"LAT", "LATENCY", 7, 10},
-		{"UP%", "UPTIME", 8, 8},
-		{"", "", 0, 0}, // HISTORY (dynamic)
-		{"SSL", "SSL", 5, 5},
-		{"RT", "RETRIES", 5, 9},
+		{"#", "#", 4, 4, false},
+		{"", "", 0, 0, false}, // NAME (special)
+		{"TYPE", "TYPE", 8, 10, false},
+		{"STATUS", "STATUS", 8, 10, false},
+		{"LAT", "LATENCY", 7, 10, false},
+		{"UP%", "UPTIME", 8, 8, false},
+		{"", "", 0, 0, false}, // HISTORY (special)
+		{"SSL", "SSL", 5, 5, false},
+		{"RT", "RETRIES", 5, 9, false},
 	}
 
 	numCols := len(cols)
diff --git a/internal/tui/tab_users.go b/internal/tui/tab_users.go
index 4793933..10e4108 100644
--- a/internal/tui/tab_users.go
+++ b/internal/tui/tab_users.go
@@ -32,8 +32,17 @@ func (m Model) viewUsersTab() string {
 		return "\n  No users configured. Press [n] to add one."
 	}
 
+	cols := []colDef{
+		{"#", "#", 4, 4, false},
+		{"USER", "USERNAME", 10, 18, false},
+		{"ROLE", "ROLE", 8, 10, false},
+		{"KEY", "PUBLIC KEY", 20, 60, true},
+	}
+	headers, widths := m.computeTableLayout(cols, 0)
+	userW := widths[1]
+
 	return m.renderTable(
-		[]string{"#", "USERNAME", "ROLE", "PUBLIC KEY"},
+		headers,
 		len(m.users),
 		func(start, end int) [][]string {
 			var rows [][]string
@@ -41,14 +50,14 @@ func (m Model) viewUsersTab() string {
 				u := m.users[i]
 				rows = append(rows, []string{
 					fmt.Sprintf("%d", i+1),
-					m.zones.Mark(fmt.Sprintf("user-%d", i), limitStr(u.Username, 15)),
+					m.zones.Mark(fmt.Sprintf("user-%d", i), limitStr(u.Username, userW-2)),
 					fmtRole(u.Role),
 					fmtKey(u.PublicKey),
 				})
 			}
 			return rows
 		},
-		nil, nil,
+		widths, nil,
 	)
 }
 
diff --git a/internal/tui/table_helpers.go b/internal/tui/table_helpers.go
index ed5397e..371ecee 100644
--- a/internal/tui/table_helpers.go
+++ b/internal/tui/table_helpers.go
@@ -15,6 +15,79 @@ var (
 
 type StyleOverride func(row, col int) *lipgloss.Style
 
+type colDef struct {
+	short    string
+	full     string
+	minWidth int
+	maxWidth int
+	flex     bool
+}
+
+func (m Model) computeTableLayout(cols []colDef, maxContentWidth int) ([]string, []int) {
+	numCols := len(cols)
+	borderOverhead := 2 + (numCols - 1)
+	usable := m.termWidth - chromePadH - 2 - borderOverhead
+	if usable < 40 {
+		usable = 40
+	}
+
+	fixedMin := 0
+	flexIdx := -1
+	for i, c := range cols {
+		if c.flex {
+			flexIdx = i
+			continue
+		}
+		fixedMin += c.minWidth
+	}
+
+	flexW := usable - fixedMin
+	if maxContentWidth > 0 && flexW > maxContentWidth {
+		flexW = maxContentWidth
+	}
+	if flexW < 8 {
+		flexW = 8
+	}
+
+	surplus := usable - fixedMin - flexW
+	if surplus < 0 {
+		surplus = 0
+	}
+
+	headers := make([]string, numCols)
+	widths := make([]int, numCols)
+	for i, c := range cols {
+		if c.flex {
+			headers[i] = c.full
+			widths[i] = flexW
+			continue
+		}
+
+		w := c.minWidth
+		expand := c.maxWidth - c.minWidth
+		if surplus >= expand {
+			w = c.maxWidth
+			surplus -= expand
+		} else if surplus > 0 {
+			w += surplus
+			surplus = 0
+		}
+
+		if w >= len(c.full)+2 {
+			headers[i] = c.full
+		} else {
+			headers[i] = c.short
+		}
+		widths[i] = w
+	}
+
+	if surplus > 0 && flexIdx >= 0 {
+		widths[flexIdx] += surplus
+	}
+
+	return headers, widths
+}
+
 func (m Model) renderTable(headers []string, items int, buildRows func(start, end int) [][]string, colWidths []int, styleOverride StyleOverride) string {
 	if items == 0 {
 		return ""