diff --git a/src/css/styles.css b/src/css/styles.css
index 6b85aea..135b5b9 100644
--- a/src/css/styles.css
+++ b/src/css/styles.css
@@ -355,6 +355,8 @@ tr.lot-child.la-sol:hover > td{background:rgba(153,69,255,.08)}
 .merge-preview .mp-row{display:flex;justify-content:space-between;padding:3px 0}
 .merge-preview .mp-lbl{color:var(--mu2)}.merge-preview .mp-val{color:var(--text);font-weight:600}
 /* DITM call calculator */
+.dc-modal{overflow:hidden}
+.dc-modal #dc-matrix{overflow-x:auto}
 .dc-inputs{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
 .dc-tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:16px 0}
 .dc-tiles:empty{display:none}
diff --git a/src/html/modals.html b/src/html/modals.html
index 809046b..2977c2a 100644
--- a/src/html/modals.html
+++ b/src/html/modals.html
@@ -27,7 +27,7 @@ <h3>Delete all trades?</h3>
 
 <!-- DITM CALL CALCULATOR (Wheeler) -->
 <div class="merge-overlay" id="ditm-overlay">
-  <div class="merge-modal" style="max-width:min(660px, calc(100vw - 24px))">
+  <div class="merge-modal dc-modal" style="width:min(720px, calc(100vw - 24px));max-width:none">
     <div style="display:flex;align-items:center;justify-content:space-between;margin-bottom:4px">
       <h3 style="font-size:.95rem">DITM Call vs 100 Shares</h3>
       <button onclick="closeDitmCalc()" style="background:transparent;border:none;color:var(--mu2);font-size:1.2rem;cursor:pointer;padding:2px 6px">&#10005;</button>
@@ -39,7 +39,7 @@ <h3 style="font-size:.95rem">DITM Call vs 100 Shares</h3>
       <div class="field"><label>Stock Price</label><input id="dc-price" type="number" step="0.01" min="0" placeholder="107.09" oninput="ditmRecalc()"></div>
       <div class="field"><label>Strike</label><input id="dc-strike" type="number" step="0.01" min="0" placeholder="75" oninput="ditmRecalc()"></div>
       <div class="field"><label>Premium /sh</label><input id="dc-prem" type="number" step="0.01" min="0" placeholder="40.50" oninput="ditmRecalc()"></div>
-      <div class="field"><label>Expiration</label><select id="dc-expiry" onchange="ditmRecalc()"></select></div>
+      <div class="field"><label>Expiration</label><input id="dc-expiry" type="date" oninput="ditmRecalc()"></div>
     </div>
     <div id="dc-tiles" class="dc-tiles"></div>
     <div id="dc-matrix"></div>
diff --git a/src/js/tradfi/20-ditm-calc.js b/src/js/tradfi/20-ditm-calc.js
index 05e1abf..03feb53 100644
--- a/src/js/tradfi/20-ditm-calc.js
+++ b/src/js/tradfi/20-ditm-calc.js
@@ -4,8 +4,6 @@
 // ditm_call_tracker.xlsx. Pure scratchpad — nothing is saved to trades.
 
 function openDitmCalc() {
-  const sel = document.getElementById('dc-expiry');
-  if (sel && !sel.options.length) sel.innerHTML = ditmExpiryOptions();
   document.getElementById('ditm-overlay').classList.add('open');
   ditmRecalc();
 }
@@ -14,26 +12,6 @@ function closeDitmCalc() {
   document.getElementById('ditm-overlay').classList.remove('open');
 }
 
-// Build the expiry dropdown: the standard monthly option expiry (3rd Friday)
-// for the next 36 months, so LEAPS-style horizons are one click away.
-function ditmExpiryOptions() {
-  const mon = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];
-  const now = new Date();
-  const out = ['<option value="">— pick expiry —</option>'];
-  for (let i = 0; i < 36; i++) {
-    const m = now.getMonth() + i;
-    const y = now.getFullYear() + Math.floor(m / 12);
-    const mm = ((m % 12) + 12) % 12;
-    const firstDow = new Date(y, mm, 1).getDay();          // 0=Sun … 6=Sat
-    const thirdFri = 1 + ((5 - firstDow + 7) % 7) + 14;    // 3rd Friday of month
-    const d = new Date(y, mm, thirdFri);
-    if (d <= now) continue;                                // skip this month if already past
-    const iso = y + '-' + String(mm + 1).padStart(2, '0') + '-' + String(thirdFri).padStart(2, '0');
-    out.push('<option value="' + iso + '">' + mon[mm] + ' ' + y + '</option>');
-  }
-  return out.join('');
-}
-
 // Auto-generate a sorted, deduped set of price levels: total loss (0),
 // current price (stock breakeven), strike, option breakeven, plus a spread
 // of ± moves around the current price.