diff --git a/server/static/styles.css b/server/static/styles.css
new file mode 100644
index 0000000..73cedd6
--- /dev/null
+++ b/server/static/styles.css
@@ -0,0 +1,149 @@
+:root {
+  --bg: #020617;
+  --panel: #0b1220;
+  --accent: #f97316;
+  --text: #e5e7eb;
+  --muted: #9ca3af;
+  --border: #1f2937;
+}
+
+* { box-sizing: border-box; }
+
+html, body {
+  margin: 0;
+  height: 100%;
+  background: radial-gradient(circle at 20% 0%, #111827, #020617);
+  color: var(--text);
+  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
+}
+
+#game {
+  position: fixed;
+  inset: 0;
+}
+
+/* Generic panel style */
+.panel {
+  position: absolute;
+  background: var(--panel);
+  border: 1px solid var(--border);
+  border-radius: 12px;
+  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6);
+  color: var(--text);
+}
+
+.hidden { display: none; }
+
+.row {
+  display: flex;
+  gap: 8px;
+  margin: 6px 0;
+}
+
+/* Auth panel */
+#ui-auth .panel {
+  top: 50%;
+  left: 50%;
+  transform: translate(-50%, -50%);
+  padding: 16px;
+  width: 280px;
+}
+
+input, button {
+  background: #020617;
+  color: var(--text);
+  border-radius: 8px;
+  border: 1px solid var(--border);
+  padding: 6px 8px;
+  font-size: 14px;
+}
+
+button {
+  cursor: pointer;
+}
+
+button:hover {
+  border-color: var(--accent);
+}
+
+/* HUD */
+#ui-hud .panel {
+  top: 10px;
+  left: 10px;
+  right: 10px;
+  padding: 8px;
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+}
+
+#xpbar {
+  position: relative;
+  width: 220px;
+  height: 18px;
+  border-radius: 999px;
+  background: #020617;
+  overflow: hidden;
+  border: 1px solid var(--border);
+}
+
+#xpfill {
+  position: absolute;
+  inset: 0;
+  width: 20%;
+  background: linear-gradient(90deg, #f97316, #22c55e);
+}
+
+#xplabel {
+  position: absolute;
+  inset: 0;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  font-size: 11px;
+}
+
+/* Chat */
+#ui-chat .panel {
+  left: 10px;
+  bottom: 10px;
+  width: 320px;
+  padding: 8px;
+}
+
+#chat-log {
+  height: 140px;
+  overflow-y: auto;
+  background: #020617;
+  border-radius: 8px;
+  padding: 6px;
+  border: 1px solid var(--border);
+  font-size: 12px;
+}
+
+/* Inventory & crafting */
+#ui-inventory .panel,
+#ui-crafting .panel {
+  top: 80px;
+  left: 50%;
+  transform: translateX(-50%);
+  width: 360px;
+  max-height: 60vh;
+  overflow-y: auto;
+  padding: 10px;
+}
+
+#inv-grid {
+  display: grid;
+  grid-template-columns: repeat(4, 1fr);
+  gap: 6px;
+}
+
+.slot {
+  background: #020617;
+  border-radius: 8px;
+  border: 1px solid var(--border);
+  padding: 6px;
+  font-size: 12px;
+  text-align: center;
+}