diff --git a/kjvstudy_org/static/style.css b/kjvstudy_org/static/style.css
index 19e32d4..c556be7 100644
--- a/kjvstudy_org/static/style.css
+++ b/kjvstudy_org/static/style.css
@@ -1120,14 +1120,33 @@ div {
     }
 
     .breadcrumb {
-        font-size: 1rem;
-        margin-bottom: 1.5rem;
+        position: static !important;
+        font-size: 0.9rem;
+        margin: 0.5rem 0 1rem 0;
+        padding-bottom: 0.5rem;
         flex-wrap: wrap;
-        gap: 0.25rem 0.5rem;
+        gap: 0.25rem 0.4rem;
+        background: transparent !important;
+        box-shadow: none !important;
+    }
+
+    .breadcrumb.stuck {
+        box-shadow: none !important;
+        padding-top: 0;
+        margin-top: 0.5rem;
+    }
+
+    .breadcrumb-actions {
+        display: none !important;
     }
 
     .breadcrumb a {
-        font-size: 1rem;
+        font-size: 0.9rem;
+        border-bottom: none;
+    }
+
+    .breadcrumb-separator {
+        margin: 0 0.3rem;
     }
 
     .search-input {
diff --git a/kjvstudy_org/templates/base.html b/kjvstudy_org/templates/base.html
index 9d03ffa..79c2305 100644
--- a/kjvstudy_org/templates/base.html
+++ b/kjvstudy_org/templates/base.html
@@ -1221,27 +1221,45 @@
                 justify-content: center;
             }
 
-            /* Optimize breadcrumbs with strong contrast */
+            /* Optimize breadcrumbs for mobile - disable sticky, hide actions */
             .breadcrumb {
-                font-size: 0.95rem;
+                position: static;
+                font-size: 0.9rem;
                 flex-wrap: wrap;
-                border-bottom: 3px solid #999;
+                border-bottom: 1px solid var(--border-color);
                 padding-bottom: 0.75rem;
+                margin: 1rem 0 1.5rem 0;
+                background: transparent;
+                box-shadow: none !important;
+            }
+
+            .breadcrumb.stuck {
+                box-shadow: none;
+                padding-top: 0;
+                margin-top: 1rem;
+            }
+
+            /* Hide breadcrumb action buttons on mobile */
+            .breadcrumb-actions {
+                display: none !important;
             }
 
             [data-theme="dark"] .breadcrumb {
-                border-bottom-color: #666;
+                border-bottom-color: var(--border-color);
             }
 
             .breadcrumb a {
-                font-weight: 600;
-                border-bottom: 2px solid #999;
-                color: #000;
+                font-weight: 500;
+                border-bottom: none;
+                color: var(--link-color);
             }
 
             [data-theme="dark"] .breadcrumb a {
-                border-bottom-color: #666;
-                color: #e0e0e0;
+                color: var(--text-secondary);
+            }
+
+            .breadcrumb-separator {
+                margin: 0 0.4rem;
             }
 
             /* Improve button visibility on mobile with strong contrast */
diff --git a/kjvstudy_org/templates/book.html b/kjvstudy_org/templates/book.html
index 56b1898..fbf0c69 100644
--- a/kjvstudy_org/templates/book.html
+++ b/kjvstudy_org/templates/book.html
@@ -148,6 +148,37 @@ section ul li strong {
         display: none;
     }
 }
+
+/* Mobile optimizations */
+@media (max-width: 768px) {
+    .chapters-section h2 + p a {
+        font-size: 1.4rem;
+    }
+
+    .book-meta {
+        font-size: 0.9rem;
+    }
+
+    section blockquote {
+        margin: 0.75rem 0 1rem;
+        padding-left: 0.75rem;
+    }
+
+    .print-btn {
+        padding: 0.75rem 1rem;
+        min-height: 44px;
+    }
+
+    .nav-hint {
+        display: none;
+    }
+}
+
+@media (max-width: 480px) {
+    .chapters-section h2 + p a {
+        font-size: 1.2rem;
+    }
+}
 </style>
 <script>
 document.addEventListener('DOMContentLoaded', function() {
diff --git a/kjvstudy_org/templates/books.html b/kjvstudy_org/templates/books.html
index e569bda..7689f5c 100644
--- a/kjvstudy_org/templates/books.html
+++ b/kjvstudy_org/templates/books.html
@@ -221,6 +221,74 @@
     background: linear-gradient(135deg, rgba(220, 38, 38, 0.08), rgba(220, 38, 38, 0.03));
     border-left: 3px solid rgba(220, 38, 38, 0.4);
 }
+
+/* Mobile optimizations */
+@media (max-width: 768px) {
+    .book-grid {
+        max-width: 100%;
+        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
+        gap: 0.75rem;
+    }
+
+    .book-card {
+        padding: 0.9rem;
+        min-height: 70px;
+    }
+
+    .book-name {
+        font-size: 1.05rem;
+    }
+
+    .book-info {
+        font-size: 0.8rem;
+    }
+
+    .testament-header {
+        font-size: 1.3rem;
+    }
+
+    .intro-text {
+        max-width: 100%;
+        font-size: 1.1rem;
+    }
+
+    .legend {
+        padding: 0.75rem;
+    }
+
+    .legend-grid {
+        grid-template-columns: repeat(2, 1fr);
+        gap: 0.4rem;
+    }
+
+    .legend-item {
+        font-size: 0.75rem;
+    }
+
+    .legend-color {
+        width: 18px;
+        height: 18px;
+    }
+}
+
+@media (max-width: 480px) {
+    .book-grid {
+        grid-template-columns: 1fr 1fr;
+        gap: 0.5rem;
+    }
+
+    .book-card {
+        padding: 0.75rem;
+    }
+
+    .book-name {
+        font-size: 0.95rem;
+    }
+
+    .legend-grid {
+        grid-template-columns: 1fr 1fr;
+    }
+}
 </style>
 {% endblock %}
 
diff --git a/kjvstudy_org/templates/chapter.html b/kjvstudy_org/templates/chapter.html
index 1f29b18..3637144 100644
--- a/kjvstudy_org/templates/chapter.html
+++ b/kjvstudy_org/templates/chapter.html
@@ -282,6 +282,79 @@ p[id^="verse-"].selected {
         display: none;
     }
 }
+
+/* Mobile optimizations */
+@media (max-width: 768px) {
+    .chapter-nav {
+        max-width: 100%;
+        padding: 1rem;
+        margin: 1.5rem 0;
+    }
+
+    .chapter-nav-controls {
+        gap: 0.75rem;
+    }
+
+    .chapter-nav-btn {
+        padding: 0.75rem 1rem;
+        font-size: 1rem;
+        min-height: 44px;
+        flex: 1;
+        text-align: center;
+    }
+
+    .chapter-select {
+        padding: 0.75rem;
+        font-size: 1rem;
+        min-height: 44px;
+        flex: 1;
+    }
+
+    .nav-help {
+        display: none;
+    }
+
+    .chapter-actions {
+        gap: 0.5rem;
+        flex-wrap: wrap;
+    }
+
+    .action-btn {
+        padding: 0.6rem 0.8rem;
+        font-size: 0.85rem;
+        min-height: 44px;
+    }
+
+    .verse-number-link {
+        font-size: 0.85rem;
+        padding: 0.25rem;
+        margin-right: 0.15rem;
+    }
+}
+
+@media (max-width: 480px) {
+    .chapter-nav-controls {
+        flex-direction: column;
+        gap: 0.5rem;
+    }
+
+    .chapter-nav-btn {
+        width: 100%;
+    }
+
+    .chapter-select {
+        width: 100%;
+    }
+
+    .chapter-actions {
+        justify-content: center;
+    }
+
+    .action-btn {
+        flex: 1;
+        justify-content: center;
+    }
+}
 </style>
 {% endblock %}
 
diff --git a/kjvstudy_org/templates/reading_plans.html b/kjvstudy_org/templates/reading_plans.html
index 05fd896..68b4c1b 100644
--- a/kjvstudy_org/templates/reading_plans.html
+++ b/kjvstudy_org/templates/reading_plans.html
@@ -149,6 +149,46 @@
     line-height: 1.9;
     margin: 1rem 0;
 }
+
+/* Mobile optimizations */
+@media (max-width: 768px) {
+    .plan-grid {
+        max-width: 100%;
+        grid-template-columns: 1fr;
+        gap: 1rem;
+    }
+
+    .plan-card {
+        padding: 1.25rem;
+    }
+
+    .plan-name {
+        font-size: 1.2rem;
+    }
+
+    .plan-description {
+        font-size: 0.95rem;
+    }
+
+    .intro-text {
+        max-width: 100%;
+        font-size: 1.05rem;
+    }
+
+    .your-plans-section {
+        padding: 1rem;
+    }
+
+    .your-plan-item {
+        flex-direction: column;
+        align-items: flex-start;
+        gap: 0.5rem;
+    }
+
+    .your-plan-next {
+        margin-left: 0;
+    }
+}
 </style>
 {% endblock %}
 
diff --git a/kjvstudy_org/templates/search.html b/kjvstudy_org/templates/search.html
index 57d310f..94a5238 100644
--- a/kjvstudy_org/templates/search.html
+++ b/kjvstudy_org/templates/search.html
@@ -156,6 +156,42 @@
 .search-tips ul {
     line-height: 1.8;
 }
+
+/* Mobile optimizations */
+@media (max-width: 768px) {
+    .search-input-wrapper {
+        max-width: 100%;
+    }
+
+    .search-input {
+        font-size: 16px; /* Prevents zoom on iOS */
+        padding: 0.9rem;
+    }
+
+    .search-button {
+        width: 100%;
+        padding: 0.9rem 1.5rem;
+        min-height: 44px;
+    }
+
+    .search-result {
+        margin: 1.5rem 0;
+        padding: 0.75rem;
+    }
+
+    .search-tips {
+        padding: 1rem;
+    }
+
+    .search-dropdown {
+        max-height: 300px;
+    }
+
+    .search-result-item {
+        padding: 0.75rem;
+        min-height: 44px;
+    }
+}
 </style>
 {% endblock %}
 
diff --git a/kjvstudy_org/templates/topics.html b/kjvstudy_org/templates/topics.html
index 03232f3..a2d9e90 100644
--- a/kjvstudy_org/templates/topics.html
+++ b/kjvstudy_org/templates/topics.html
@@ -60,6 +60,32 @@
     line-height: 1.9;
     margin: 1rem 0;
 }
+
+/* Mobile optimizations */
+@media (max-width: 768px) {
+    .topic-grid {
+        max-width: 100%;
+        grid-template-columns: 1fr;
+        gap: 1rem;
+    }
+
+    .topic-card {
+        padding: 1.25rem;
+    }
+
+    .topic-name {
+        font-size: 1.2rem;
+    }
+
+    .topic-description {
+        font-size: 0.95rem;
+    }
+
+    .intro-text {
+        max-width: 100%;
+        font-size: 1.05rem;
+    }
+}
 </style>
 {% endblock %}
 
diff --git a/kjvstudy_org/templates/verse.html b/kjvstudy_org/templates/verse.html
index 7abe007..96b023e 100644
--- a/kjvstudy_org/templates/verse.html
+++ b/kjvstudy_org/templates/verse.html
@@ -644,6 +644,33 @@
 }
 
 @media (max-width: 768px) {
+    .verse-text {
+        font-size: 1.4rem;
+        line-height: 2rem;
+        margin: 1.5rem 0;
+    }
+
+    .share-container {
+        max-width: 100%;
+        padding: 1rem 0;
+    }
+
+    .share-buttons {
+        gap: 0.5rem;
+    }
+
+    .share-btn {
+        padding: 0.75rem 1rem;
+        font-size: 0.9rem;
+        min-height: 44px;
+        flex: 1;
+        justify-content: center;
+    }
+
+    .cross-ref-tooltip {
+        display: none;
+    }
+
     .interlinear-flow {
         line-height: 4.5;
     }