diff --git a/src/NexusReader.UI.Shared/Components/Molecules/AiResponseRenderer.razor.css b/src/NexusReader.UI.Shared/Components/Molecules/AiResponseRenderer.razor.css
index 7fcb266..09c66a8 100644
--- a/src/NexusReader.UI.Shared/Components/Molecules/AiResponseRenderer.razor.css
+++ b/src/NexusReader.UI.Shared/Components/Molecules/AiResponseRenderer.razor.css
@@ -266,3 +266,49 @@
     0% { transform: rotate(0deg); }
     100% { transform: rotate(360deg); }
 }
+
+/* ============================================================
+   LIGHT THEME OVERRIDES — "Warm Paper / Soft Sepia"
+   ============================================================ */
+
+.theme-light .ai-row .message-avatar {
+    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
+    color: #ffffff;
+    border: 1px solid rgba(16, 185, 129, 0.2);
+    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.15);
+}
+
+.theme-light .user-row .message-avatar {
+    box-shadow: 0 2px 8px rgba(139, 130, 115, 0.1);
+}
+
+.theme-light .upsell-card {
+    box-shadow: 0 8px 32px rgba(16, 185, 129, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
+}
+
+.theme-light .btn-primary {
+    background: var(--accent);
+    color: #ffffff;
+}
+
+.theme-light .btn-primary:hover:not(:disabled) {
+    background: #059669;
+    color: #ffffff;
+    opacity: 1;
+    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.15);
+}
+
+.theme-light .btn-secondary {
+    border-color: var(--accent);
+    color: var(--accent);
+}
+
+.theme-light .btn-secondary:hover {
+    background: rgba(16, 185, 129, 0.05);
+}
+
+.theme-light .paywall-teaser {
+    -webkit-mask-image: linear-gradient(to bottom, #000 30%, transparent 100%);
+    mask-image: linear-gradient(to bottom, #000 30%, transparent 100%);
+}
+
diff --git a/src/NexusReader.UI.Shared/Components/Organisms/ConceptsMap.razor.css b/src/NexusReader.UI.Shared/Components/Organisms/ConceptsMap.razor.css
index 47220b5..9b69e69 100644
--- a/src/NexusReader.UI.Shared/Components/Organisms/ConceptsMap.razor.css
+++ b/src/NexusReader.UI.Shared/Components/Organisms/ConceptsMap.razor.css
@@ -233,3 +233,126 @@
 .lock-icon {
     color: rgba(255, 255, 255, 0.2);
 }
+
+/* ============================================================
+   LIGHT THEME OVERRIDES — "Warm Paper / Soft Sepia"
+   ============================================================ */
+
+.theme-light .concepts-map::-webkit-scrollbar-thumb:hover {
+    background: var(--accent);
+}
+
+.theme-light .empty-map-state {
+    background: rgba(0, 0, 0, 0.01);
+    border-color: var(--border);
+    color: var(--text-muted);
+}
+
+.theme-light .empty-map-state .dim-icon {
+    color: var(--text-muted);
+    opacity: 0.4;
+}
+
+.theme-light .timeline-step:hover {
+    background: rgba(0, 0, 0, 0.02);
+}
+
+.theme-light .timeline-step.unlocked:hover {
+    border-color: rgba(16, 185, 129, 0.15);
+    box-shadow: 0 4px 20px rgba(16, 185, 129, 0.05);
+}
+
+.theme-light .timeline-step.selected {
+    background: rgba(16, 185, 129, 0.04);
+    border-color: var(--accent);
+    box-shadow: 0 0 12px rgba(16, 185, 129, 0.15);
+}
+
+.theme-light .node-circle {
+    background: var(--bg-surface);
+}
+
+.theme-light .unlocked .node-circle {
+    background: var(--bg-surface);
+    border-color: var(--accent);
+    color: var(--accent);
+    box-shadow: none;
+}
+
+.theme-light .locked .node-circle {
+    background: var(--bg-base);
+    border-color: var(--border);
+    color: var(--text-muted);
+}
+
+.theme-light .node-glow {
+    display: none;
+}
+
+.theme-light .track-active {
+    background: var(--accent);
+    box-shadow: none;
+}
+
+.theme-light .track-inactive {
+    background: var(--border);
+}
+
+.theme-light .node-content {
+    background: var(--bg-surface);
+    border: 1px solid var(--border);
+}
+
+.theme-light .timeline-step.selected .node-content {
+    background: var(--bg-surface);
+    border-color: rgba(16, 185, 129, 0.2);
+}
+
+.theme-light .segment-tag {
+    color: var(--text-muted);
+}
+
+.theme-light .unlocked .segment-tag {
+    color: var(--accent);
+}
+
+.theme-light .badge-unlocked {
+    background: rgba(16, 185, 129, 0.08);
+    color: var(--accent);
+    border-color: rgba(16, 185, 129, 0.2);
+}
+
+.theme-light .badge-locked {
+    background: var(--bg-base);
+    color: var(--text-muted);
+    border-color: var(--border);
+}
+
+.theme-light .node-title {
+    color: var(--text-main);
+}
+
+.theme-light .timeline-step.unlocked:hover .node-title {
+    color: var(--accent);
+}
+
+.theme-light .locked .node-title {
+    color: var(--text-muted);
+}
+
+.theme-light .node-desc {
+    color: var(--text-muted);
+}
+
+.theme-light .locked .node-desc {
+    color: var(--text-muted);
+}
+
+.theme-light .check-icon {
+    color: var(--accent);
+}
+
+.theme-light .lock-icon {
+    color: var(--text-muted);
+}
+
diff --git a/src/NexusReader.UI.Shared/Components/Organisms/ContextualRecommendationsWidget.razor.css b/src/NexusReader.UI.Shared/Components/Organisms/ContextualRecommendationsWidget.razor.css
index 4718152..a014fe9 100644
--- a/src/NexusReader.UI.Shared/Components/Organisms/ContextualRecommendationsWidget.razor.css
+++ b/src/NexusReader.UI.Shared/Components/Organisms/ContextualRecommendationsWidget.razor.css
@@ -251,3 +251,80 @@
         padding: 1.25rem;
     }
 }
+
+/* ============================================================
+   LIGHT THEME OVERRIDES — "Warm Paper / Soft Sepia"
+   ============================================================ */
+
+.theme-light .recommendations-panel {
+    background: var(--bg-surface);
+    border: 1px solid var(--border);
+}
+
+.theme-light .recommendations-panel:hover {
+    box-shadow: 0 8px 24px rgba(139, 130, 115, 0.12);
+}
+
+.theme-light .header-left h4 {
+    color: var(--text-main);
+}
+
+.theme-light .spinner-track {
+    border: 3px solid rgba(0, 0, 0, 0.05);
+}
+
+.theme-light .loading-label,
+.theme-light .empty-state {
+    color: var(--text-muted);
+}
+
+.theme-light .recommendation-item {
+    background: rgba(0, 0, 0, 0.02);
+    border: 1px solid rgba(0, 0, 0, 0.06);
+}
+
+.theme-light .recommendation-item:hover {
+    background: rgba(0, 0, 0, 0.04);
+}
+
+.theme-light .recommendation-item.premium {
+    border-color: rgba(245, 158, 11, 0.2);
+}
+
+.theme-light .recommendation-item.premium:hover {
+    border-color: rgba(245, 158, 11, 0.4);
+    background: rgba(245, 158, 11, 0.04);
+}
+
+.theme-light .recommendation-item.owned {
+    border-color: rgba(16, 185, 129, 0.1);
+}
+
+.theme-light .recommendation-item.owned:hover {
+    border-color: rgba(16, 185, 129, 0.25);
+}
+
+.theme-light .rec-book-title {
+    color: var(--text-main);
+}
+
+.theme-light .rec-chapter-title {
+    color: var(--text-muted);
+}
+
+.theme-light .rec-action-btn {
+    border: 1px solid rgba(0, 0, 0, 0.08);
+    color: var(--text-muted);
+}
+
+.theme-light .rec-action-btn:hover {
+    background: rgba(16, 185, 129, 0.1);
+    border-color: rgba(16, 185, 129, 0.3);
+    color: var(--accent);
+}
+
+.theme-light .premium .rec-action-btn:hover {
+    background: rgba(245, 158, 11, 0.1);
+    border-color: rgba(245, 158, 11, 0.3);
+    color: #f59e0b;
+}
diff --git a/src/NexusReader.UI.Shared/Components/Organisms/CurrentReadingWidget.razor.css b/src/NexusReader.UI.Shared/Components/Organisms/CurrentReadingWidget.razor.css
index 429b93c..bb2c941 100644
--- a/src/NexusReader.UI.Shared/Components/Organisms/CurrentReadingWidget.razor.css
+++ b/src/NexusReader.UI.Shared/Components/Organisms/CurrentReadingWidget.razor.css
@@ -210,3 +210,60 @@
         align-items: center;
     }
 }
+
+/* ============================================================
+   LIGHT THEME OVERRIDES — "Warm Paper / Soft Sepia"
+   ============================================================ */
+
+.theme-light .current-reading-card {
+    background: var(--bg-surface);
+    border: 1px solid var(--border);
+}
+
+.theme-light .current-reading-card:hover {
+    background: var(--bg-surface);
+    border-color: var(--accent);
+    box-shadow: 0 10px 30px rgba(139, 130, 115, 0.12);
+}
+
+.theme-light .book-cover img {
+    box-shadow: 0 15px 35px rgba(139, 130, 115, 0.18);
+    border: 1px solid rgba(0, 0, 0, 0.06);
+}
+
+.theme-light .book-title {
+    color: var(--text-main);
+}
+
+.theme-light .author-name {
+    color: var(--text-muted);
+}
+
+.theme-light .chapter-name {
+    color: var(--text-main);
+}
+
+.theme-light .progress-bar-container {
+    background: #e4e1d9;
+}
+
+.theme-light .progress-bar-fill {
+    box-shadow: 0 0 6px rgba(16, 185, 129, 0.2);
+}
+
+.theme-light .book-excerpt {
+    color: var(--text-muted);
+}
+
+.theme-light .empty-text h3 {
+    color: var(--text-main);
+}
+
+.theme-light .empty-text p {
+    color: var(--text-muted);
+}
+
+.theme-light .empty-icon {
+    color: var(--accent);
+    filter: none;
+}
diff --git a/src/NexusReader.UI.Shared/Layout/MainHubLayout.razor.css b/src/NexusReader.UI.Shared/Layout/MainHubLayout.razor.css
index ddb2cf6..fb859da 100644
--- a/src/NexusReader.UI.Shared/Layout/MainHubLayout.razor.css
+++ b/src/NexusReader.UI.Shared/Layout/MainHubLayout.razor.css
@@ -342,4 +342,80 @@
     }
 }
 
+/* ============================================================
+   LIGHT THEME OVERRIDES — "Warm Paper / Soft Sepia"
+   Scoped via .theme-light on an ancestor element.
+   ============================================================ */
 
+/* --- Desktop Sidebar: warm paper shadow --- */
+.theme-light ::deep .hub-sidebar {
+    box-shadow: 4px 0 20px rgba(139, 130, 115, 0.08);
+}
+
+/* --- Logo icon: remove neon glow --- */
+.theme-light ::deep .logo-icon {
+    filter: none;
+}
+
+/* --- Nav item hover: ensure green text, warm hover bg --- */
+.theme-light ::deep .nav-item:hover {
+    color: #10b981;
+    background: rgba(0, 0, 0, 0.02);
+}
+
+/* --- Nav active indicator: reduced glow --- */
+.theme-light ::deep .nav-item.active::before {
+    box-shadow: 0 0 8px rgba(16, 185, 129, 0.3);
+}
+
+/* --- Nexus loader: remove neon drop-shadow --- */
+.theme-light ::deep .nexus-loader {
+    filter: none;
+}
+
+/* --- Mobile Styles --- */
+@media (max-width: 768px) {
+
+    /* Hamburger button: dark text on warm paper */
+    .theme-light .hamburger-btn {
+        color: #292524;
+    }
+
+    .theme-light .hamburger-btn:hover {
+        background: rgba(0, 0, 0, 0.04);
+    }
+
+    /* User avatar mini: solid accent, white text, no neon glow */
+    .theme-light .user-avatar-mini {
+        background: #10b981;
+        border: 1px solid rgba(0, 0, 0, 0.08);
+        color: #ffffff;
+        box-shadow: 0 2px 8px rgba(16, 185, 129, 0.15);
+    }
+
+    /* Pulsing logo: subtle accent pulse, no neon glow */
+    .theme-light .pulsing-logo {
+        animation: pulse-glow-light 2s infinite ease-in-out;
+    }
+
+    @keyframes pulse-glow-light {
+        0%, 100% {
+            filter: none;
+            opacity: 0.85;
+        }
+        50% {
+            filter: drop-shadow(0 0 4px rgba(16, 185, 129, 0.2));
+            opacity: 1;
+        }
+    }
+
+    /* Mobile sidebar open state: warm shadow instead of dark */
+    .theme-light .mobile-menu-open ::deep .hub-sidebar {
+        box-shadow: 10px 0 30px rgba(139, 130, 115, 0.2);
+    }
+
+    /* Mobile topbar: warm paper border */
+    .theme-light .nexus-mobile-topbar {
+        border-bottom-color: rgba(0, 0, 0, 0.08);
+    }
+}
diff --git a/src/NexusReader.UI.Shared/Pages/Account/Profile.razor.css b/src/NexusReader.UI.Shared/Pages/Account/Profile.razor.css
index e90bc4d..d629224 100644
--- a/src/NexusReader.UI.Shared/Pages/Account/Profile.razor.css
+++ b/src/NexusReader.UI.Shared/Pages/Account/Profile.razor.css
@@ -400,3 +400,59 @@
         flex-direction: column;
     }
 }
+
+/* ============================================
+   Light Theme Overrides — Warm Paper / Soft Sepia
+   ============================================ */
+
+/* Background radial — warmer, slightly stronger glow */
+.theme-light .background-radial {
+    background: radial-gradient(circle, rgba(16, 185, 129, 0.04) 0%, transparent 70%);
+}
+
+/* Avatar — keep green accent, reduce glow intensity */
+.theme-light .avatar-inner {
+    box-shadow: 0 0 20px rgba(16, 185, 129, 0.12), inset 0 0 15px rgba(16, 185, 129, 0.05);
+}
+
+/* Avatar glow ring — softer border */
+.theme-light .avatar-glow {
+    border-color: rgba(16, 185, 129, 0.2);
+}
+
+/* Glass panel hover — warm sepia shadow instead of pure black */
+.theme-light .glass-panel:hover {
+    box-shadow: 0 10px 30px rgba(139, 130, 115, 0.12);
+}
+
+/* Progress bar — reduce neon glow */
+.theme-light .progress-bar {
+    box-shadow: 0 0 10px rgba(16, 185, 129, 0.2);
+}
+
+/* Decorative text — dark ink on light bg instead of light on dark */
+.theme-light .decoration {
+    color: rgba(0, 0, 0, 0.04);
+}
+
+/* Tenant tag — warm stone gray */
+.theme-light .tenant-tag {
+    color: #78716c;
+}
+
+/* Loader — disable neon drop-shadow, softer border */
+.theme-light .nexus-loader {
+    border-color: rgba(16, 185, 129, 0.15);
+    border-top-color: #10b981;
+    filter: none;
+}
+
+/* Theme option active — reduce glow in light mode */
+.theme-light .theme-option-btn.active {
+    box-shadow: 0 0 10px rgba(16, 185, 129, 0.1);
+}
+
+/* Progress bar track — light stone gray */
+.theme-light .usage-progress {
+    background: #e4e1d9;
+}
diff --git a/src/NexusReader.UI.Shared/Pages/Catalog.razor.css b/src/NexusReader.UI.Shared/Pages/Catalog.razor.css
index 1d1ed3d..1ae0296 100644
--- a/src/NexusReader.UI.Shared/Pages/Catalog.razor.css
+++ b/src/NexusReader.UI.Shared/Pages/Catalog.razor.css
@@ -357,3 +357,34 @@
     from { transform: translate(-50%, -50%) scale(0.9); opacity: 0; }
     to { transform: translate(-50%, -50%) scale(1); opacity: 1; }
 }
+
+/* ============================================
+   LIGHT THEME OVERRIDES — Warm Paper / Soft Sepia
+   ============================================ */
+
+.theme-light .course-card:hover {
+    box-shadow: 0 12px 30px rgba(139, 130, 115, 0.15);
+}
+
+.theme-light .card-cover-container {
+    background: rgba(0, 0, 0, 0.03);
+}
+
+.theme-light .cover-overlay {
+    background: rgba(0, 0, 0, 0.5);
+}
+
+.theme-light .course-card:hover .start-action {
+    color: #292524;
+}
+
+.theme-light .dotnet-gradient,
+.theme-light .blazor-gradient,
+.theme-light .graph-gradient {
+    background: #e4e1d9;
+}
+
+.theme-light .cover-code-text {
+    color: var(--text-main);
+    text-shadow: none;
+}
diff --git a/src/NexusReader.UI.Shared/Pages/ConceptsDashboard.razor.css b/src/NexusReader.UI.Shared/Pages/ConceptsDashboard.razor.css
index e5131aa..0dbd5ed 100644
--- a/src/NexusReader.UI.Shared/Pages/ConceptsDashboard.razor.css
+++ b/src/NexusReader.UI.Shared/Pages/ConceptsDashboard.razor.css
@@ -402,3 +402,54 @@
         justify-content: center;
     }
 }
+
+/* ============================================
+   Light Theme Overrides — Warm Paper / Soft Sepia
+   ============================================ */
+
+/* Dashboard header — warm sepia shadow instead of pure black */
+.theme-light .dashboard-header {
+    box-shadow: 0 4px 30px rgba(139, 130, 115, 0.05);
+}
+
+/* Neon pulse icon — disable glow filter entirely */
+.theme-light .neon-pulse {
+    filter: none;
+}
+
+/* Override the neon pulse keyframe states in light mode */
+.theme-light .neon-pulse {
+    animation-name: robot-pulse-light;
+}
+
+@keyframes robot-pulse-light {
+    0% { transform: scale(1); filter: none; }
+    50% { transform: scale(1.08); filter: none; }
+    100% { transform: scale(1); filter: none; }
+}
+
+/* Scan line — reduce glow intensity */
+.theme-light .scan-line {
+    box-shadow: 0 0 8px rgba(16, 185, 129, 0.3);
+    opacity: 0.5;
+}
+
+/* Glowing brain empty state — subtle warm glow */
+.theme-light .empty-glowing-brain {
+    box-shadow: 0 0 12px rgba(16, 185, 129, 0.1);
+}
+
+/* Error icon — reduce drop-shadow intensity */
+.theme-light .error-icon {
+    filter: drop-shadow(0 0 4px rgba(255, 74, 74, 0.2));
+}
+
+/* Back button hover — warm glow instead of neon */
+.theme-light .header-back .btn-back:hover {
+    box-shadow: 0 0 8px rgba(16, 185, 129, 0.1);
+}
+
+/* Action button hover — warm glow */
+.theme-light .header-actions .btn-action:hover {
+    box-shadow: 0 0 12px rgba(16, 185, 129, 0.1);
+}
diff --git a/src/NexusReader.UI.Shared/Pages/Dashboard.razor.css b/src/NexusReader.UI.Shared/Pages/Dashboard.razor.css
index ddf1ec9..29e079a 100644
--- a/src/NexusReader.UI.Shared/Pages/Dashboard.razor.css
+++ b/src/NexusReader.UI.Shared/Pages/Dashboard.razor.css
@@ -639,4 +639,91 @@
     font-size: 0.85rem;
 }
 
+/* ============================================================
+   LIGHT THEME OVERRIDES — "Warm Paper / Soft Sepia"
+   ============================================================ */
+
+.theme-light .username::before,
+.theme-light .username::after {
+    color: var(--accent);
+}
+
+.theme-light .avatar-glow {
+    background: var(--accent);
+    filter: blur(15px);
+    opacity: 0.2;
+}
+
+.theme-light .progress-container {
+    background: #e4e1d9;
+}
+
+.theme-light .progress-bar {
+    background: var(--accent);
+    box-shadow: 0 0 8px rgba(16, 185, 129, 0.2);
+}
+
+.theme-light .progress-bubble {
+    background: var(--accent);
+    color: #ffffff;
+}
+
+.theme-light .graph-node {
+    background: rgba(0, 0, 0, 0.06);
+    border: 1px solid rgba(0, 0, 0, 0.08);
+}
+
+.theme-light .graph-node.central {
+    background: var(--accent);
+    box-shadow: 0 0 12px rgba(16, 185, 129, 0.2);
+}
+
+.theme-light .graph-node.satellite {
+    background: rgba(16, 185, 129, 0.15);
+    border: 1px solid var(--accent);
+}
+
+.theme-light .graph-node.satellite:hover {
+    background: var(--accent);
+    box-shadow: 0 0 10px var(--accent);
+}
+
+.theme-light .active-node-label {
+    background: rgba(16, 185, 129, 0.06);
+    border: 1px solid var(--accent);
+    color: var(--accent);
+}
+
+.theme-light .quiz-option.active {
+    background: rgba(16, 185, 129, 0.06);
+    border-color: var(--accent);
+    color: var(--accent);
+}
+
+.theme-light .btn-nexus.primary {
+    background: var(--accent);
+    color: #0d0d0d;
+}
+
+.theme-light .btn-nexus.primary:hover {
+    background: #059669;
+    color: #ffffff;
+}
+
+.theme-light .empty-icon {
+    color: var(--accent);
+    filter: none;
+}
+
+.theme-light .badge-success {
+    background: rgba(16, 185, 129, 0.1);
+    color: var(--accent);
+    border: 1px solid rgba(16, 185, 129, 0.2);
+}
+
+.theme-light .concept-type {
+    color: var(--accent);
+}
+
+
 
diff --git a/src/NexusReader.UI.Shared/Pages/Intelligence.razor.css b/src/NexusReader.UI.Shared/Pages/Intelligence.razor.css
index 1594c97..4d78412 100644
--- a/src/NexusReader.UI.Shared/Pages/Intelligence.razor.css
+++ b/src/NexusReader.UI.Shared/Pages/Intelligence.razor.css
@@ -262,3 +262,66 @@
     0% { transform: rotate(0deg); }
     100% { transform: rotate(360deg); }
 }
+
+/* ============================================================
+   LIGHT THEME OVERRIDES — "Warm Paper / Soft Sepia"
+   ============================================================ */
+
+.theme-light .welcome-prompt {
+    color: var(--text-main);
+}
+
+.theme-light .welcome-icon svg {
+    stroke: var(--text-muted);
+}
+
+.theme-light .welcome-icon svg circle {
+    fill: var(--text-muted);
+}
+
+.theme-light .welcome-icon svg path[stroke^="rgba(139"] {
+    stroke: rgba(120, 113, 108, 0.4);
+}
+
+.theme-light .welcome-icon svg path[stroke^="rgba(139"][stroke-dasharray] {
+    stroke: rgba(120, 113, 108, 0.3);
+}
+
+.theme-light .input-field-group {
+    background: var(--bg-surface);
+    border: 1px solid var(--border);
+    box-shadow: 0 10px 30px rgba(139, 130, 115, 0.08);
+}
+
+.theme-light .input-field-group:focus-within {
+    border-color: var(--accent);
+    box-shadow: 0 10px 35px rgba(16, 185, 129, 0.15);
+}
+
+.theme-light .nexus-input {
+    color: var(--text-main);
+}
+
+.theme-light .nexus-input::placeholder {
+    color: var(--text-muted);
+}
+
+.theme-light .nexus-select {
+    background-color: var(--bg-surface);
+    border-color: var(--border);
+    color: var(--text-main);
+}
+
+.theme-light .nexus-select:focus {
+    border-color: var(--accent);
+    box-shadow: 0 0 8px var(--accent-glow);
+}
+
+.theme-light .chat-thread-container::-webkit-scrollbar-thumb {
+    background: rgba(0, 0, 0, 0.1);
+}
+
+.theme-light .chat-thread-container::-webkit-scrollbar-thumb:hover {
+    background: rgba(0, 0, 0, 0.2);
+}
+
diff --git a/src/NexusReader.UI.Shared/Pages/MyBooks.razor.css b/src/NexusReader.UI.Shared/Pages/MyBooks.razor.css
index 5ddab46..4b089b4 100644
--- a/src/NexusReader.UI.Shared/Pages/MyBooks.razor.css
+++ b/src/NexusReader.UI.Shared/Pages/MyBooks.razor.css
@@ -383,3 +383,27 @@
     from { transform: translate(-50%, -50%) scale(0.9); opacity: 0; }
     to { transform: translate(-50%, -50%) scale(1); opacity: 1; }
 }
+
+/* ============================================
+   LIGHT THEME OVERRIDES — Warm Paper / Soft Sepia
+   ============================================ */
+
+.theme-light .book-card:hover {
+    box-shadow: 0 12px 30px rgba(139, 130, 115, 0.15);
+}
+
+.theme-light .book-cover-container {
+    background: rgba(0, 0, 0, 0.03);
+}
+
+.theme-light .cover-overlay {
+    background: rgba(0, 0, 0, 0.5);
+}
+
+.theme-light .book-card:hover .read-action {
+    color: #292524;
+}
+
+.theme-light .progress-bar {
+    background: #e4e1d9;
+}
diff --git a/src/NexusReader.UI.Shared/Pages/Settings.razor.css b/src/NexusReader.UI.Shared/Pages/Settings.razor.css
index 7df77b0..08911a0 100644
--- a/src/NexusReader.UI.Shared/Pages/Settings.razor.css
+++ b/src/NexusReader.UI.Shared/Pages/Settings.razor.css
@@ -72,3 +72,40 @@
     from { opacity: 0; transform: translateY(15px); }
     to { opacity: 1; transform: translateY(0); }
 }
+
+/* ============================================================
+   LIGHT THEME OVERRIDES — "Warm Paper / Soft Sepia"
+   ============================================================ */
+
+.theme-light .settings-page > h1 {
+    background: none;
+    -webkit-text-fill-color: initial;
+    color: var(--text-main);
+}
+
+.theme-light .settings-page > p {
+    color: var(--text-muted);
+}
+
+.theme-light .settings-section h2 {
+    color: var(--text-main);
+}
+
+.theme-light .settings-section p {
+    color: var(--text-muted);
+}
+
+.theme-light .diag-btn {
+    background: rgba(16, 185, 129, 0.05);
+    color: var(--accent);
+    border: 1px solid rgba(16, 185, 129, 0.2);
+}
+
+.theme-light .diag-btn:hover {
+    background: var(--accent);
+    color: #ffffff;
+    border-color: var(--accent);
+    box-shadow: 0 0 10px rgba(16, 185, 129, 0.2);
+    transform: translateY(-2px);
+}
+