refactor: remove exact nested css duplicates

app/frontend/styles/styles.css

@@ -4775,10 +4775,6 @@ body.sidebar-collapsed .sidebar-collapse-button .lucide {
 }
 
 @media (min-width: 721px) and (max-width: 1279px) {
-  .market-tape {
-    display: none;
-  }
-
   .app-header {
     grid-template-columns: 190px minmax(0, 1fr) auto;
   }
@@ -4980,21 +4976,6 @@ body.sidebar-collapsed .sidebar-collapse-button .lucide {
     box-shadow: 0 -4px 18px rgba(24, 34, 45, 0.07);
   }
 
-  .module-nav .nav-brand,
-  .module-nav .nav-group-label,
-  .module-nav .market-sub-tab,
-  .module-nav .sidebar-collapse-button {
-    display: none;
-  }
-
-  .module-nav .nav-group,
-  body.sidebar-collapsed .module-nav .nav-group {
-    display: contents;
-    margin: 0;
-    padding: 0;
-    border: 0;
-  }
-
   .module-nav .module-tab,
   body.sidebar-collapsed .module-nav .module-tab {
     min-height: 54px;
@@ -5009,11 +4990,6 @@ body.sidebar-collapsed .sidebar-collapse-button .lucide {
     text-align: center;
   }
 
-  .module-nav .module-tab.mobile-primary-tab,
-  body.sidebar-collapsed .module-nav .module-tab.mobile-primary-tab {
-    display: flex;
-  }
-
   .module-nav .module-tab span,
   body.sidebar-collapsed .module-nav .module-tab span {
     display: block;
@@ -13017,10 +12993,6 @@ button.account-role-badge:focus-visible { outline: 2px solid var(--blue); outlin
 }
 
 @media (max-width: 720px) {
-  body.mentor-directory-open {
-    overflow: hidden;
-  }
-
   .mentor-layout {
     height: auto;
     min-height: 580px;
@@ -14874,13 +14846,6 @@ dialog::backdrop {
     width: 100%;
   }
 
-  body,
-  body.sidebar-collapsed {
-    display: block;
-    min-height: 100dvh;
-    padding-bottom: calc(68px + env(safe-area-inset-bottom));
-  }
-
   .app-header {
     width: 100%;
     height: 108px;
@@ -14893,10 +14858,6 @@ dialog::backdrop {
     background: rgba(255, 255, 255, .98);
   }
 
-  .brand-block {
-    height: 42px;
-  }
-
   .brand-block .brand-mark,
   .brand-block .brand-logo {
     width: 34px;
@@ -14912,20 +14873,6 @@ dialog::backdrop {
     font-size: 16px;
   }
 
-  .header-actions {
-    position: absolute;
-    inset: 56px 10px auto;
-    display: flex;
-    justify-content: space-between;
-    gap: 6px;
-  }
-
-  .header-date-group {
-    height: 42px;
-    min-width: 0;
-    flex: 1;
-  }
-
   .header-date-group .date-input {
     width: 112px;
     flex: 1;
@@ -14937,12 +14884,6 @@ dialog::backdrop {
     min-width: 30px;
   }
 
-  .header-actions > .icon-button {
-    width: 40px;
-    min-width: 40px;
-    min-height: 42px;
-  }
-
   .header-menu-button {
     display: grid;
   }
@@ -15056,9 +14997,7 @@ dialog::backdrop {
     font-size: 14px;
   }
 
-  .overview-strip .metric:nth-of-type(1) { grid-column: 2; grid-row: 1; }
   .overview-strip .metric:nth-of-type(2) { grid-column: 3; grid-row: 1; border-right: 0; }
-  .overview-strip .metric:nth-of-type(3) { grid-column: 2; grid-row: 2; }
   .overview-strip .metric:nth-of-type(4) { grid-column: 3; grid-row: 2; border-right: 0; }
   .overview-strip .metric:nth-of-type(5) { grid-column: 1 / 2; grid-row: 3; border-bottom: 0; }
   .overview-strip .metric:nth-of-type(6) { grid-column: 2 / 4; grid-row: 3; border-right: 0; border-bottom: 0; }
@@ -15315,10 +15254,6 @@ dialog::backdrop {
     overflow-y: auto;
   }
 
-  .curated-strategy-list {
-    grid-template-columns: 1fr;
-  }
-
   .quant-universe-grid {
     grid-template-columns: 1fr 1fr;
   }