diff --git a/internal/server/web/static/terminal.js b/internal/server/web/static/terminal.js
index ed8a8c7..aaef8e4 100644
--- a/internal/server/web/static/terminal.js
+++ b/internal/server/web/static/terminal.js
@@ -10,6 +10,8 @@
   const touch = matchMedia('(pointer: coarse)').matches;
   const desk = !touch; // drag and drop, splits: computers only
   if (touch) document.body.classList.add('touch');
+  const ua = (navigator.userAgentData && navigator.userAgentData.platform) || navigator.platform || navigator.userAgent;
+  if (/^Win/i.test(ua) || /Windows/.test(navigator.userAgent)) document.body.classList.add('win');
   const $ = id => document.getElementById(id);
   const statusEl = $('status'), area = $('area'), tablist = $('tablist'), addBtn = $('tabadd'),
     floatAdd = $('floatadd'), addMenu = $('addmenu'), hint = $('hint'), mark = $('tabmark');
diff --git a/internal/server/web/templates/terminal.html b/internal/server/web/templates/terminal.html
index 0284139..7428ba3 100644
--- a/internal/server/web/templates/terminal.html
+++ b/internal/server/web/templates/terminal.html
@@ -73,11 +73,14 @@
   /* The terminals' area. */
   .area { position:relative; flex:1; min-height:0; margin:12px 16px 16px; border:1px solid var(--border); border-radius:10px; background:#0c0f13; overflow:hidden; }
   body.multi .area { margin-top:0; border-top-left-radius:0; }
-  .float-add { position:absolute; top:8px; right:38px; z-index:6; width:28px; height:28px; padding:0; display:inline-flex;
+  .float-add { position:absolute; top:8px; right:10px; z-index:6; width:28px; height:28px; padding:0; display:inline-flex;
                align-items:center; justify-content:center; font-size:17px; line-height:1; color:var(--text);
                background:transparent; border:1px solid var(--border); opacity:.28; transition:opacity .25s ease, background .25s ease, top .25s ease; }
   /* One tab split in panes: below the panes' title bars, clear of their close buttons. */
   body.split1 .float-add { top:42px; }
+  /* Windows draws a wide scrollbar in the terminal: the "+" keeps clear of it. */
+  body.win .float-add { right:38px; top:16px; }
+  body.win.split1 .float-add { top:48px; }
   .float-add:hover, .float-add:focus-visible { opacity:1; background:var(--panel); }
   body.multi .float-add { opacity:0; pointer-events:none; }
   .tabview { position:absolute; inset:8px; opacity:0; visibility:hidden; transform:translateY(4px) scale(.995);