diff --git a/templates/main.css b/templates/main.css
index e69de29..f845856 100644
--- a/templates/main.css
+++ b/templates/main.css
@@ -0,0 +1,124 @@
+:root {
+    --primary-color: #9146FF; /* Twitch Purple */
+    --on-primary-color: #FFFFFF;
+    --font-family: 'Inter', sans-serif;
+}
+
+/* Dark theme (default) */
+[data-theme="dark"] {
+    --background-color: #121212;
+    --surface-color: #1e1e1e;
+    --text-color: #E0E0E0;
+    --text-secondary-color: #A0A0A0;
+    --border-color: #333333;
+}
+
+/* Light theme */
+[data-theme="light"] {
+    --background-color: #F4F4F5;
+    --surface-color: #FFFFFF;
+    --text-color: #18181B;
+    --text-secondary-color: #52525B;
+    --border-color: #E4E4E7;
+}
+
+body {
+    background-color: var(--background-color);
+    color: var(--text-color);
+    font-family: var(--font-family);
+    margin: 0;
+    padding: 2rem;
+    display: flex;
+    justify-content: center;
+    align-items: flex-start;
+    min-height: 100vh;
+    transition: background-color 0.2s ease, color 0.2s ease;
+}
+
+.container {
+    width: 100%;
+    max-width: 800px;
+    text-align: center;
+}
+
+.main-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    margin-bottom: 3rem;
+    border-bottom: 1px solid var(--border-color);
+    padding-bottom: 1rem;
+}
+
+.logo {
+    text-decoration: none;
+    color: var(--text-color);
+}
+
+.main-header h1 {
+    margin: 0;
+    font-weight: 700;
+    font-size: 1.5rem;
+}
+
+.card {
+    background-color: var(--surface-color);
+    border: 1px solid var(--border-color);
+    border-radius: 8px;
+    padding: 2rem;
+    margin-bottom: 1.5rem;
+    text-align: left;
+    transition: background-color 0.2s ease, border-color 0.2s ease;
+}
+
+.card h2 {
+    margin-top: 0;
+    border-bottom: 1px solid var(--border-color);
+    padding-bottom: 0.5rem;
+    margin-bottom: 1rem;
+}
+
+.btn {
+    display: inline-block;
+    background-color: var(--primary-color);
+    color: var(--on-primary-color);
+    padding: 12px 24px;
+    border-radius: 6px;
+    text-decoration: none;
+    font-weight: 500;
+    border: none;
+    cursor: pointer;
+    transition: background-color 0.2s ease-in-out;
+}
+
+.btn:hover {
+    background-color: #7a3ad9; /* Darker purple */
+}
+
+.btn-twitch {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    font-size: 1.1rem;
+}
+
+.theme-btn {
+    background: none;
+    border: 1px solid var(--border-color);
+    color: var(--text-secondary-color);
+    width: 40px;
+    height: 40px;
+    border-radius: 50%;
+    cursor: pointer;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+}
+.theme-btn:hover {
+    background-color: var(--surface-color);
+}
+
+[data-theme="dark"] .sun-icon { display: block; }
+[data-theme="dark"] .moon-icon { display: none; }
+[data-theme="light"] .sun-icon { display: none; }
+[data-theme="light"] .moon-icon { display: block; }
\ No newline at end of file
diff --git a/templates/overlay-bright-green.css b/templates/overlay-bright-green.css
index 35f6db8..e69de29 100644
--- a/templates/overlay-bright-green.css
+++ b/templates/overlay-bright-green.css
@@ -1,20 +0,0 @@
-body {
-    background-color: transparent;
-    color: #FFFFFF;
-    font-family: 'Inter', sans-serif;
-    font-size: 16px;
-    margin: 0;
-    padding: 10px;
-    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.7);
-    overflow: hidden;
-}
-.chat-message {
-    padding: 6px 10px;
-    background-color: rgba(10, 10, 10, 0.5);
-    border-left: 3px solid #1ED760; /* Bright Green Accent */
-    margin-bottom: 8px;
-}
-.username {
-    font-weight: 800;
-    color: #1ED760; /* Bright Green */
-}
\ No newline at end of file
diff --git a/templates/overlay-dark-purple.css b/templates/overlay-dark-purple.css
index b7ef871..e69de29 100644
--- a/templates/overlay-dark-purple.css
+++ b/templates/overlay-dark-purple.css
@@ -1,20 +0,0 @@
-body {
-    background-color: transparent;
-    color: #E0E0E0;
-    font-family: 'Inter', sans-serif;
-    font-size: 16px;
-    margin: 0;
-    padding: 10px;
-    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.8);
-    overflow: hidden;
-}
-.chat-message {
-    padding: 4px 8px;
-    background-color: rgba(24, 24, 27, 0.6);
-    border-radius: 4px;
-    margin-bottom: 8px;
-}
-.username {
-    font-weight: 800;
-    color: #a970ff; /* Twitch Purple */
-}
\ No newline at end of file