diff --git a/docs/_static/livecode/livecode.js b/docs/_static/livecode/livecode.js
index 0389577..ed90497 100644
--- a/docs/_static/livecode/livecode.js
+++ b/docs/_static/livecode/livecode.js
@@ -4,6 +4,12 @@
 // click, so a reader who never runs anything never downloads Pyodide.
 
 const COLUMNS = 80;
+// Narrowest terminal the fit may produce. progressbar's default widget set
+// needs about 57 columns before the bar itself gets any room, so a phone
+// width host shrinks the font instead of the column count.
+const MIN_COLUMNS = 60;
+const FONT_SIZE = 13;
+const MIN_FONT_SIZE = 6;
 const RUN_TIMEOUT_MS = 30000;
 
 // Read the Docs serves the site under `/en/<version>/`, so root-absolute
@@ -133,8 +139,19 @@ function fitTerminalWidth(terminal, host) {
   terminal.loadAddon(addon);
   /** @type {() => void} */
   const fit = () => {
+    // Measure at the full font first so a host that grows back gets its
+    // original size, then shrink the font until MIN_COLUMNS fit.
+    terminal.options.fontSize = FONT_SIZE;
     /** @type {{cols: number, rows: number} | undefined} */
-    const dimensions = addon.proposeDimensions();
+    let dimensions = addon.proposeDimensions();
+    if (dimensions && Number.isInteger(dimensions.cols)
+        && dimensions.cols > 0 && dimensions.cols < MIN_COLUMNS) {
+      terminal.options.fontSize = Math.max(
+        MIN_FONT_SIZE,
+        Math.floor(FONT_SIZE * dimensions.cols / MIN_COLUMNS),
+      );
+      dimensions = addon.proposeDimensions();
+    }
     if (dimensions && Number.isInteger(dimensions.cols)
         && dimensions.cols > 0 && dimensions.cols !== terminal.cols) {
       terminal.resize(dimensions.cols, terminal.rows);
@@ -181,7 +198,7 @@ function createPanel(container, source) {
     cols: COLUMNS,
     rows: container.closest('.home-quickstart') ? 3 : 12,
     convertEol: true,
-    fontSize: 13,
+    fontSize: FONT_SIZE,
     theme: {background: '#101418', foreground: '#d6e2ef'},
   });
   terminal.open(terminalHost);
diff --git a/docs/_static/livecode/worker.js b/docs/_static/livecode/worker.js
index 624ce06..1c2ec39 100644
--- a/docs/_static/livecode/worker.js
+++ b/docs/_static/livecode/worker.js
@@ -37,7 +37,7 @@ const THREAD_ERROR_MESSAGE =
   'animation above is the real output. See the source for the pattern.';
 
 const BRIDGE = `
-import os, sys, js, traceback
+import os, sys, time, js, traceback
 from pyodide.ffi import to_js
 
 
@@ -109,9 +109,22 @@ def _excepthook(exc_type, exc_value, exc_tb):
     traceback.print_exception(exc_type, exc_value, exc_tb, file=sys.stderr)
 
 
+def _sleep(seconds):
+    # Pyodide's own time.sleep costs about 80ms per 10ms call in Chromium
+    # on macOS (measured 2026-09-15; Linux stays close to nominal), which
+    # pushed a 1000-item tutorial run past the console's 30 second stop.
+    # A perf_counter loop keeps to the asked duration on every platform.
+    # It burns the worker's CPU while waiting, which is the same thread
+    # the blocking sleep already held.
+    deadline = time.perf_counter() + max(0.0, seconds)
+    while time.perf_counter() < deadline:
+        pass
+
+
 def _install_bridge(columns):
     global _LAST_ERROR
     _LAST_ERROR = None
+    time.sleep = _sleep
     os.environ['TERM'] = 'xterm-256color'
     os.environ['COLORTERM'] = 'truecolor'
     os.environ['COLUMNS'] = str(columns)
diff --git a/tests/console/test_console.py b/tests/console/test_console.py
index cfeb2a7..1681596 100644
--- a/tests/console/test_console.py
+++ b/tests/console/test_console.py
@@ -357,3 +357,34 @@ def fail_wheels_manifest(route: Route) -> None:
     # and not a hang. `resetWorker()` nulling out the cached `booting`
     # promise is what makes this 2 instead of 1.
     assert _worker_count(browser_page) == 2
+
+
+def test_sleep_in_the_console_keeps_to_its_duration(
+    server: str,
+    page: tuple[Page, list[str]],
+) -> None:
+    """Pyodide's own ``time.sleep`` costs about 80ms per 10ms call in
+    Chromium on macOS, which pushed a 1000-item tutorial run past the
+    console's 30s stop. The worker installs its own sleep, so a call
+    must cost close to what it asks for on every platform.
+    """
+    browser_page, errors = page
+    browser_page.goto(f'{server}/tutorial/step2.html')
+    browser_page.get_by_role('button', name='Edit code').click()
+    browser_page.locator('.demo-editor').fill(
+        'import time\n'
+        'started = time.perf_counter()\n'
+        'for _ in range(20):\n'
+        '    time.sleep(0.01)\n'
+        'per_call_ms = (time.perf_counter() - started) / 20 * 1000\n'
+        "print(f'per call: {per_call_ms:.1f} ms')\n"
+    )
+    browser_page.click('.demo-button')
+    _wait_for_terminal_text(browser_page, 'per call:', BOOT_TIMEOUT_MS)
+    text: str = browser_page.evaluate(
+        'window.__consoleTestTerminal.buffer.active.getLine(0)'
+        '.translateToString(true)'
+    )
+    per_call_ms: float = float(text.split('per call:')[1].split('ms')[0])
+    assert 8 <= per_call_ms <= 25, text
+    assert not errors
diff --git a/tests/console/test_homepage.py b/tests/console/test_homepage.py
index 5a49a23..76e9e90 100644
--- a/tests/console/test_homepage.py
+++ b/tests/console/test_homepage.py
@@ -119,6 +119,11 @@ def test_homepage_output_has_colour_and_fits_after_resizing(
     for width in (1440, 768, 375):
         browser_page.set_viewport_size({'width': width, 'height': 1000})
         browser_page.get_by_role('button', name='Run', exact=True).click()
+        # The default widget set needs about 57 columns before the bar
+        # gets any room, so the console must never fit narrower than that.
+        browser_page.wait_for_function(
+            '() => window.__consoleTestTerminal.cols >= 60', timeout=5000
+        )
         _wait_for_terminal_text(browser_page, '100%', BOOT_TIMEOUT_MS)
         browser_page.wait_for_function("""() => {
             const term = window.__consoleTestTerminal;