diff --git a/public/splash.html b/public/splash.html
index 7105ba7..56141e5 100644
--- a/public/splash.html
+++ b/public/splash.html
@@ -20,7 +20,7 @@
       --logo-surface: #f4f4f5;
       --card-gloss-start: rgba(255, 255, 255, 0.62);
       --card-gloss-end: rgba(255, 255, 255, 0);
-      --shadow: 0 30px 80px rgba(0, 0, 0, 0.18), 0 2px 10px rgba(0, 0, 0, 0.06);
+      --shadow: none;
     }
 
     * {
@@ -48,14 +48,14 @@
     }
 
     .splash-shell {
-      width: calc(100% - 76px);
-      height: calc(100% - 72px);
-      min-width: 640px;
-      min-height: 360px;
+      width: 100%;
+      height: 100%;
+      min-width: 0;
+      min-height: 0;
       position: relative;
       overflow: hidden;
-      border-radius: 8px;
-      border: 1px solid var(--card-border);
+      border-radius: 0;
+      border: none;
       background:
         linear-gradient(180deg, var(--card-gloss-start) 0%, var(--card-gloss-end) 48%),
         var(--card-bg);
@@ -350,7 +350,7 @@
         setVar("--logo-surface", "#2b2b2b");
         setVar("--card-gloss-start", "rgba(255, 255, 255, 0.035)");
         setVar("--card-gloss-end", "rgba(255, 255, 255, 0)");
-        setVar("--shadow", "0 30px 80px rgba(0, 0, 0, 0.42), 0 2px 10px rgba(0, 0, 0, 0.24)");
+        setVar("--shadow", "none");
       } else {
         setVar("--card-bg", "rgba(255, 255, 255, 0.96)");
         setVar("--card-bg-solid", "#ffffff");
@@ -362,7 +362,7 @@
         setVar("--logo-surface", "#f4f4f5");
         setVar("--card-gloss-start", "rgba(255, 255, 255, 0.62)");
         setVar("--card-gloss-end", "rgba(255, 255, 255, 0)");
-        setVar("--shadow", "0 30px 80px rgba(0, 0, 0, 0.18), 0 2px 10px rgba(0, 0, 0, 0.06)");
+        setVar("--shadow", "none");
       }
     }
 
diff --git a/src/components/Export/ExportDefaultsSettingsForm.scss b/src/components/Export/ExportDefaultsSettingsForm.scss
index 8381c87..e237673 100644
--- a/src/components/Export/ExportDefaultsSettingsForm.scss
+++ b/src/components/Export/ExportDefaultsSettingsForm.scss
@@ -461,21 +461,21 @@
 // UI rebuild polish for the modal variant used by ExportPage.
 .export-defaults-settings-form.layout-split {
   display: grid;
-  gap: 12px;
+  gap: 10px;
 
   .form-group {
-    grid-template-columns: minmax(180px, 0.85fr) minmax(0, 1.15fr);
-    gap: 14px;
+    grid-template-columns: minmax(176px, 0.82fr) minmax(0, 1.18fr);
+    gap: 12px;
     align-items: start;
-    padding: 14px;
-    border: 1px solid color-mix(in srgb, var(--border-color) 68%, transparent);
-    border-radius: 14px;
-    background: var(--bg-secondary);
+    padding: 12px;
+    border: none;
+    border-radius: 12px;
+    background: color-mix(in srgb, var(--bg-secondary) 82%, var(--bg-primary));
   }
 
   .form-group:first-child,
   .form-group:last-child {
-    padding: 14px;
+    padding: 12px;
   }
 
   .form-copy {
@@ -510,26 +510,31 @@
   .settings-time-range-trigger {
     border-radius: 12px;
     background: var(--bg-primary);
+    min-height: 42px;
+    padding: 9px 12px;
   }
 
   .log-toggle-line {
     border-radius: 12px;
     background: var(--bg-primary);
+    min-height: 42px;
+    padding: 8px 12px;
   }
 
   .concurrency-inline-options {
-    grid-template-columns: repeat(6, minmax(42px, 1fr));
+    grid-template-columns: repeat(6, minmax(38px, 1fr));
     gap: 6px;
   }
 
   .concurrency-option {
     min-width: 0;
     min-height: 36px;
+    border-radius: 8px;
   }
 
   .format-setting-group {
     grid-template-columns: 1fr;
-    gap: 12px;
+    gap: 10px;
   }
 
   .format-grid {
@@ -540,9 +545,9 @@
   }
 
   .format-card {
-    min-height: 74px;
+    min-height: 68px;
     padding: 10px 12px;
-    border-radius: 12px;
+    border-radius: 8px;
     background: var(--bg-primary);
   }
 
@@ -561,7 +566,7 @@
       min-height: 36px;
       padding: 8px 10px;
       border: 1px solid var(--border-color);
-      border-radius: 12px;
+      border-radius: 8px;
       background: var(--bg-primary);
     }
   }
diff --git a/src/pages/ExportPage.scss b/src/pages/ExportPage.scss
index 50a5953..29e34e7 100644
--- a/src/pages/ExportPage.scss
+++ b/src/pages/ExportPage.scss
@@ -1158,20 +1158,21 @@
 }
 
 .export-defaults-modal {
-  width: min(760px, calc(100vw - 40px));
+  width: min(740px, calc(100vw - 40px));
   max-height: min(82vh, 820px);
   border-radius: 16px;
   background: var(--bg-primary);
-  border-color: color-mix(in srgb, var(--border-color) 80%, transparent);
+  border-color: color-mix(in srgb, var(--border-color) 68%, transparent);
   box-shadow: var(--shadow-md);
 }
 
 .export-defaults-modal-header {
-  padding: 16px 18px 12px;
+  padding: 16px 18px 10px;
+  border-bottom-color: color-mix(in srgb, var(--border-color) 64%, transparent);
 }
 
 .export-defaults-modal-body {
-  padding: 14px 18px 16px;
+  padding: 12px 18px 14px;
   overflow-x: hidden;
 }