diff --git a/public/desktop.css b/public/desktop.css
new file mode 100644
index 0000000..f4b05fe
--- /dev/null
+++ b/public/desktop.css
@@ -0,0 +1,118 @@
+:root {
+    --md3-primary: #2962FF; /* Blue 800 */
+    --md3-primary-container: #82B1FF; /* Light Blue */
+}
+
+/* Desktop Dark Mode — Material 3 Expressive Style */
+body {
+    font-family: "Roboto", "Segoe UI", sans-serif;
+    background-color: #121212;
+    color: #E3E3E3;
+    margin: 0;
+    padding: 0;
+}
+
+.container {
+    max-width: 800px;
+    margin: 60px auto;
+    background: #1E1E1E;
+    padding: 40px;
+    border-radius: 24px;
+    box-shadow: 0 4px 20px rgba(0,0,0,0.4);
+    border: 1px solid rgba(255, 255, 255, 0.05);
+    transition: background-color 0.3s ease;
+}
+
+h1 {
+    font-size: 2.4em;
+    margin-bottom: 32px;
+    text-align: center;
+    color: #FFFFFF;
+    font-weight: 500;
+}
+
+.button-group {
+    display: flex;
+    justify-content: center;
+    gap: 20px;
+    margin-bottom: 36px;
+}
+
+button {
+    background-color: var(--md3-primary);
+    color: white;
+    border: none;
+    padding: 14px 28px;
+    font-size: 1.1em;
+    border-radius: 28px;
+    cursor: pointer;
+    font-weight: 500;
+    box-shadow: 0 2px 4px rgba(0,0,0,0.3);
+    transition: background-color 0.25s ease, box-shadow 0.25s ease, transform 0.15s ease;
+}
+
+button:hover {
+    background-color: var(--md3-primary-container);
+    box-shadow: 0 4px 10px rgba(0,0,0,0.4);
+    transform: translateY(-2px);
+}
+
+.status-container {
+    text-align: center;
+    font-size: 1.3em;
+}
+
+.status-text.green {
+    color: #4CAF50;
+    font-weight: 600;
+}
+
+.status-text.red {
+    color: #FF6D60;
+    font-weight: 600;
+}
+
+/* Material 3 Spinner */
+.spinner {
+  display: none;
+  width: 48px;
+  height: 48px;
+  margin: 20px auto 0;
+  animation: spinner-rotate 2s linear infinite;
+  transform-origin: 50% 50%;
+}
+
+.spinner.visible {
+  display: block;
+}
+
+.spinner .path {
+  stroke: var(--md3-primary);
+  stroke-linecap: round;
+  stroke-dasharray: 90, 150;
+  stroke-dashoffset: 0;
+  animation: spinner-dash 1.5s ease-in-out infinite;
+}
+
+/* Rotation animation on the whole SVG */
+@keyframes spinner-rotate {
+  100% {
+    transform: rotate(360deg);
+  }
+}
+
+/* Stroke dash animation on the circle */
+@keyframes spinner-dash {
+  0% {
+    stroke-dasharray: 1, 150;
+    stroke-dashoffset: 0;
+  }
+  50% {
+    stroke-dasharray: 90, 150;
+    stroke-dashoffset: -35;
+  }
+  100% {
+    stroke-dasharray: 90, 150;
+    stroke-dashoffset: -124;
+  }
+}
diff --git a/public/mobile.css b/public/mobile.css
new file mode 100644
index 0000000..0debcbc
--- /dev/null
+++ b/public/mobile.css
@@ -0,0 +1,119 @@
+:root {
+    --md3-primary: #2962FF; /* Blue 800 */
+    --md3-primary-container: #82B1FF; /* Light Blue */
+}
+
+/* Mobile Dark Mode — Material 3 Expressive Style */
+body {
+    font-family: "Roboto", "Segoe UI", sans-serif;
+    background-color: #121212;
+    color: #E3E3E3;
+    margin: 0;
+    padding: 0;
+    text-align: center;
+}
+
+.container {
+    padding: 20px;
+    background-color: #1E1E1E;
+    border-radius: 24px;
+    margin: 12px;
+    box-shadow: 0 4px 16px rgba(0,0,0,0.4);
+    border: 1px solid rgba(255, 255, 255, 0.05);
+}
+
+h1 {
+    font-size: 2em;
+    margin-bottom: 28px;
+    font-weight: 500;
+    color: #FFFFFF;
+}
+
+.button-group {
+    display: flex;
+    flex-direction: column;
+    gap: 18px;
+}
+
+button {
+    background-color: var(--md3-primary);
+    color: white;
+    border: none;
+    padding: 18px;
+    font-size: 1.3em;
+    border-radius: 30px;
+    cursor: pointer;
+    font-weight: 500;
+    box-shadow: 0 2px 6px rgba(0,0,0,0.3);
+    transition: background-color 0.25s ease, box-shadow 0.25s ease, transform 0.15s ease;
+}
+
+button:active {
+    transform: scale(0.97);
+    background-color: var(--md3-primary-container);
+}
+
+.status-container {
+    margin-top: 28px;
+    font-size: 1.2em;
+}
+
+.status-text {
+    display: block;
+    margin-top: 10px;
+}
+
+.status-text.green {
+    color: #4CAF50;
+    font-weight: 600;
+}
+
+.status-text.red {
+    color: #FF6D60;
+    font-weight: 600;
+}
+
+/* Material 3 Spinner */
+.spinner {
+  display: none;
+  width: 64px;
+  height: 64px;
+  margin: 24px auto 0;
+  animation: spinner-rotate 2s linear infinite;
+  transform-origin: 50% 50%;
+}
+
+.spinner.visible {
+  display: block;
+}
+
+.spinner .path {
+  stroke: var(--md3-primary);
+  stroke-linecap: round;
+  stroke-dasharray: 90, 150;
+  stroke-dashoffset: 0;
+  animation: spinner-dash 1.5s ease-in-out infinite;
+}
+
+/* Rotation animation on the whole SVG */
+@keyframes spinner-rotate {
+  100% {
+    transform: rotate(360deg);
+  }
+}
+
+/* Stroke dash animation on the circle */
+@keyframes spinner-dash {
+  0% {
+    stroke-dasharray: 1, 150;
+    stroke-dashoffset: 0;
+  }
+  50% {
+    stroke-dasharray: 90, 150;
+    stroke-dashoffset: -35;
+  }
+  100% {
+    stroke-dasharray: 90, 150;
+    stroke-dashoffset: -124;
+  }
+}