add image generation tab and fix mobile menu

css/style.css

@@ -23,46 +23,70 @@ body {
   color: var(--pink-900);
   line-height: 1.6;
   min-height: 100vh;
+  padding-left: 240px;
 }
 
 a { color: var(--pink-500); text-decoration: none; }
 a:hover { color: var(--pink-700); text-decoration: underline; }
 
-/* Navigation */
+/* Navigation - Sidebar */
 nav {
-  background: linear-gradient(90deg, var(--pink-600), var(--pink-500), var(--pink-600));
-  padding: 0 2rem;
-  position: sticky;
+  background: linear-gradient(180deg, var(--pink-600), var(--pink-500), var(--pink-600));
+  position: fixed;
   top: 0;
+  left: 0;
+  width: 240px;
+  height: 100vh;
   z-index: 100;
-  box-shadow: 0 4px 20px rgba(255,20,147,0.3);
+  box-shadow: 4px 0 20px rgba(255,20,147,0.2);
+  overflow-y: auto;
+  display: flex;
+  flex-direction: column;
 }
 
 .nav-inner {
-  max-width: 1100px;
-  margin: 0 auto;
   display: flex;
-  align-items: center;
-  gap: 1rem;
+  flex-direction: column;
+  align-items: stretch;
+  padding: 1.5rem 1rem;
+  gap: 0.5rem;
+  flex: 1;
 }
 
 .nav-brand {
   color: var(--white);
   font-weight: 800;
-  font-size: 1.4rem;
+  font-size: 1.2rem;
   letter-spacing: -0.5px;
-  padding: 1rem 0;
+  padding: 0.5rem 0.8rem;
+  text-decoration: none;
+  white-space: nowrap;
+  border-radius: 8px;
 }
 
-.nav-links { display: flex; gap: 0.25rem; flex-wrap: wrap; }
+.nav-brand:hover {
+  background: rgba(255,255,255,0.1);
+  text-decoration: none;
+}
+
+.nav-links {
+  display: flex;
+  flex-direction: column;
+  gap: 0.15rem;
+  flex: 1;
+}
 
 .nav-links a {
   color: var(--pink-100);
-  padding: 0.6rem 1rem;
+  padding: 0.6rem 0.8rem;
   border-radius: 8px;
-  font-size: 0.9rem;
+  font-size: 0.88rem;
   font-weight: 500;
   transition: background 0.2s;
+  text-decoration: none;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
 }
 
 .nav-links a:hover,
@@ -73,12 +97,97 @@ nav {
   box-shadow: 0 0 10px rgba(255,62,196,0.3);
 }
 
+.nav-actions {
+  display: flex;
+  flex-direction: column;
+  gap: 0.5rem;
+  padding-top: 0.5rem;
+  border-top: 1px solid rgba(255,255,255,0.15);
+}
+
+/* Menu Toggle (Hamburger) - mobile only */
+.menu-toggle {
+  background: var(--pink-800);
+  border: 2px solid var(--pink-400);
+  color: var(--white);
+  padding: 0.4rem 0.7rem;
+  border-radius: 8px;
+  cursor: pointer;
+  font-size: 1.1rem;
+  transition: background 0.2s, border-color 0.2s;
+  line-height: 1;
+  display: none;
+  position: fixed;
+  top: 0.8rem;
+  left: 0.8rem;
+  z-index: 10001;
+}
+
+.menu-toggle:hover {
+  background: var(--pink-900);
+  border-color: var(--pink-300);
+}
+
+/* Dark mode toggle in sidebar */
+.dark-toggle {
+  background: rgba(0,0,0,0.2);
+  border: 2px solid rgba(255,255,255,0.2);
+  color: var(--white);
+  padding: 0.5rem 0.7rem;
+  border-radius: 8px;
+  cursor: pointer;
+  font-size: 1rem;
+  transition: background 0.2s, border-color 0.2s;
+  line-height: 1;
+  align-self: stretch;
+}
+
+.dark-toggle:hover {
+  background: rgba(0,0,0,0.3);
+  border-color: rgba(255,255,255,0.3);
+}
+
+/* Mobile responsive - sidebar becomes overlay */
+@media (max-width: 900px) {
+  nav {
+    width: 260px;
+    transform: translateX(-100%);
+    transition: transform 0.3s ease;
+    z-index: 9999;
+  }
+
+  nav.sidebar-open {
+    transform: translateX(0);
+  }
+
+  .menu-toggle {
+    display: block;
+  }
+
+  .nav-links a {
+    padding: 0.7rem 0.8rem;
+    font-size: 0.95rem;
+  }
+
+  body {
+    padding-left: 0;
+  }
+
+  .hero {
+    padding-left: 3.5rem;
+  }
+
+  .container {
+    padding-left: 1rem;
+  }
+}
+
 /* Hero */
 .hero {
   background: linear-gradient(135deg, var(--pink-500), var(--pink-600), var(--pink-700));
   color: var(--white);
   text-align: center;
-  padding: 5rem 2rem;
+  padding: 4rem 2rem;
   position: relative;
   overflow: hidden;
 }
@@ -304,25 +413,13 @@ footer {
   padding: 1.8rem;
   font-size: 0.9rem;
   box-shadow: 0 -4px 20px rgba(255,20,147,0.3);
+  margin-left: 240px;
 }
 
-/* Dark Mode Toggle */
-.dark-toggle {
-  background: var(--pink-800);
-  border: 2px solid var(--pink-400);
-  color: var(--white);
-  padding: 0.4rem 0.7rem;
-  border-radius: 8px;
-  cursor: pointer;
-  font-size: 1.1rem;
-  margin-left: auto;
-  transition: background 0.2s, border-color 0.2s;
-  line-height: 1;
-}
-
-.dark-toggle:hover {
-  background: var(--pink-900);
-  border-color: var(--pink-300);
+@media (max-width: 900px) {
+  footer {
+    margin-left: 0;
+  }
 }
 
 /* Dark Mode */
@@ -366,8 +463,8 @@ footer {
 }
 
 [data-theme="dark"] nav {
-  background: linear-gradient(90deg, #0f3460, #1a1a3e, #0f3460);
-  box-shadow: 0 4px 20px rgba(255,20,147,0.15);
+  background: linear-gradient(180deg, #0f3460, #1a1a3e, #0f3460);
+  box-shadow: 4px 0 20px rgba(255,20,147,0.1);
 }
 
 [data-theme="dark"] .nav-links a {
@@ -378,7 +475,46 @@ footer {
 [data-theme="dark"] .nav-links a.active {
   background: #0f3460;
   color: var(--text-nav-hover);
-  box-shadow: 0 0 10px rgba(255,62,196,0.2);
+  box-shadow: 0 0 10px rgba(255,62,196,0.15);
+}
+
+/* Dark mode sidebar toggle buttons */
+[data-theme="dark"] .menu-toggle {
+  background: #0f3460;
+  border-color: var(--pink-500);
+}
+
+[data-theme="dark"] .menu-toggle:hover {
+  background: #1a1a3e;
+  border-color: var(--pink-400);
+}
+
+[data-theme="dark"] .dark-toggle {
+  background: rgba(255,255,255,0.05);
+  border-color: rgba(255,255,255,0.15);
+}
+
+[data-theme="dark"] .dark-toggle:hover {
+  background: rgba(255,255,255,0.1);
+  border-color: rgba(255,255,255,0.25);
+}
+
+/* Mobile sidebar backdrop */
+@media (max-width: 900px) {
+  .sidebar-backdrop {
+    position: fixed;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    background: rgba(0,0,0,0.5);
+    z-index: 9998;
+    display: none;
+  }
+
+  .sidebar-backdrop.visible {
+    display: block;
+  }
 }
 
 [data-theme="dark"] .hero {
@@ -1244,3 +1380,238 @@ footer {
   color: var(--text-primary);
 }
 
+/* Image generation styles */
+.image-gen-prompt-area {
+  background: var(--white);
+  border-radius: 16px;
+  padding: 1.5rem;
+  margin-bottom: 1.5rem;
+  box-shadow: var(--shadow-lg);
+  border: 2px solid var(--pink-200);
+  display: flex;
+  flex-direction: column;
+  gap: 0.8rem;
+}
+
+.image-gen-prompt-area label {
+  font-size: 0.8rem;
+  font-weight: 700;
+  color: var(--pink-600);
+  text-transform: uppercase;
+  letter-spacing: 0.5px;
+}
+
+.image-gen-prompt-area textarea {
+  padding: 0.8rem 1rem;
+  border: 2px solid var(--pink-200);
+  border-radius: 12px;
+  font-size: 0.95rem;
+  color: var(--pink-900);
+  background: var(--pink-50);
+  font-family: inherit;
+  resize: none;
+  outline: none;
+  transition: border-color 0.2s, background 0.2s;
+}
+
+.image-gen-prompt-area textarea:focus {
+  border-color: var(--pink-400);
+  background: var(--white);
+}
+
+.image-gen-prompt-area textarea::placeholder {
+  color: var(--pink-300);
+}
+
+.generate-btn {
+  background: linear-gradient(135deg, var(--pink-500), var(--pink-600));
+  color: var(--white);
+  border: none;
+  padding: 0.7rem 1.5rem;
+  border-radius: 12px;
+  cursor: pointer;
+  font-size: 0.95rem;
+  font-weight: 700;
+  transition: background 0.2s, transform 0.1s, opacity 0.2s;
+  align-self: flex-start;
+}
+
+.generate-btn:hover:not(:disabled) {
+  background: linear-gradient(135deg, var(--pink-600), var(--pink-700));
+  transform: translateY(-1px);
+}
+
+.generate-btn:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+
+.image-gen-results {
+  background: var(--white);
+  border-radius: 16px;
+  border: 2px solid var(--pink-200);
+  box-shadow: var(--shadow-lg);
+  min-height: 200px;
+  max-height: 70vh;
+  overflow-y: auto;
+  padding: 1.5rem;
+  scroll-behavior: smooth;
+}
+
+.image-gen-placeholder {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  min-height: 200px;
+}
+
+.image-gen-placeholder p {
+  color: var(--pink-400);
+  font-style: italic;
+  font-size: 0.95rem;
+}
+
+.image-gen-loading {
+  color: var(--pink-500);
+  font-style: italic;
+}
+
+.image-gen-error {
+  color: var(--pink-700);
+  font-weight: 600;
+  text-align: center;
+}
+
+.generated-image-card {
+  background: var(--pink-50);
+  border: 2px solid var(--pink-200);
+  border-radius: 16px;
+  padding: 1.2rem;
+  margin-bottom: 1rem;
+  animation: llmFadeIn 0.3s ease-out;
+}
+
+.generated-image-prompt {
+  font-size: 0.9rem;
+  color: var(--pink-700);
+  margin-bottom: 0.8rem;
+  padding-bottom: 0.5rem;
+  border-bottom: 1px solid var(--pink-200);
+  font-weight: 600;
+}
+
+.generated-image-container {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  margin-bottom: 0.8rem;
+  border-radius: 12px;
+  overflow: hidden;
+  background: var(--white);
+}
+
+.generated-image {
+  max-width: 100%;
+  max-height: 512px;
+  width: auto;
+  height: auto;
+  display: block;
+  border-radius: 8px;
+}
+
+.generated-image-actions {
+  display: flex;
+  gap: 0.8rem;
+}
+
+.image-action-btn {
+  background: linear-gradient(135deg, var(--pink-400), var(--pink-500));
+  color: var(--white);
+  border: none;
+  padding: 0.5rem 1.2rem;
+  border-radius: 10px;
+  cursor: pointer;
+  font-size: 0.85rem;
+  font-weight: 700;
+  transition: background 0.2s, transform 0.1s;
+}
+
+.image-action-btn:hover {
+  background: linear-gradient(135deg, var(--pink-500), var(--pink-600));
+  transform: translateY(-1px);
+}
+
+/* Dark mode image generation styles */
+[data-theme="dark"] .image-gen-prompt-area {
+  background: var(--bg-card);
+  border-color: var(--border-primary);
+  box-shadow: 0 10px 25px rgba(0,0,0,0.3);
+}
+
+[data-theme="dark"] .image-gen-prompt-area label {
+  color: var(--text-heading-strong);
+}
+
+[data-theme="dark"] .image-gen-prompt-area textarea {
+  background: var(--bg-primary);
+  border-color: var(--border-primary);
+  color: var(--text-primary);
+}
+
+[data-theme="dark"] .image-gen-prompt-area textarea:focus {
+  border-color: var(--border-accent);
+  background: var(--bg-secondary);
+}
+
+[data-theme="dark"] .image-gen-prompt-area textarea::placeholder {
+  color: var(--text-secondary);
+}
+
+[data-theme="dark"] .generate-btn {
+  background: linear-gradient(135deg, var(--pink-600), #0f3460);
+}
+
+[data-theme="dark"] .generate-btn:hover:not(:disabled) {
+  background: linear-gradient(135deg, var(--pink-500), #1a1a3e);
+}
+
+[data-theme="dark"] .image-gen-results {
+  background: var(--bg-card);
+  border-color: var(--border-primary);
+  box-shadow: 0 10px 25px rgba(0,0,0,0.3);
+}
+
+[data-theme="dark"] .image-gen-placeholder p {
+  color: var(--text-secondary);
+}
+
+[data-theme="dark"] .image-gen-loading {
+  color: var(--pink-400);
+}
+
+[data-theme="dark"] .image-gen-error {
+  color: var(--pink-300);
+}
+
+[data-theme="dark"] .generated-image-card {
+  background: var(--bg-primary);
+  border-color: var(--border-primary);
+}
+
+[data-theme="dark"] .generated-image-prompt {
+  color: var(--text-heading);
+  border-bottom-color: var(--border-primary);
+}
+
+[data-theme="dark"] .generated-image-container {
+  background: var(--bg-secondary);
+}
+
+[data-theme="dark"] .image-action-btn {
+  background: linear-gradient(135deg, var(--pink-600), #0f3460);
+}
+
+[data-theme="dark"] .image-action-btn:hover {
+  background: linear-gradient(135deg, var(--pink-500), #1a1a3e);
+}
+