Add student and admin frontends

static/style.css

@@ -1,6 +1,8 @@
 :root {
   color-scheme: light dark;
   font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
+  background: #f6f7f9;
+  color: #18212f;
 }
 
 body {
@@ -15,3 +17,283 @@ body {
   margin: 0 auto;
   padding: 24px;
 }
+
+.panel {
+  background: #ffffff;
+  border: 1px solid #d9dee7;
+  border-radius: 8px;
+  padding: 24px;
+  box-shadow: 0 10px 30px rgba(19, 33, 54, 0.08);
+}
+
+.narrow {
+  max-width: 440px;
+  margin: 8vh auto;
+}
+
+.center {
+  text-align: center;
+}
+
+.stack {
+  display: grid;
+  gap: 16px;
+}
+
+h1, h2 {
+  margin-top: 0;
+}
+
+label {
+  display: grid;
+  gap: 6px;
+  font-weight: 700;
+}
+
+input, textarea, select, button, .button {
+  font: inherit;
+}
+
+input, textarea, select {
+  border: 1px solid #b8c0cc;
+  border-radius: 8px;
+  padding: 10px 12px;
+  background: #fff;
+  color: #18212f;
+}
+
+button, .button {
+  border: 1px solid #9aa7b8;
+  border-radius: 8px;
+  padding: 10px 14px;
+  background: #eef1f5;
+  color: #18212f;
+  cursor: pointer;
+  text-decoration: none;
+}
+
+button:disabled {
+  cursor: not-allowed;
+  opacity: 0.55;
+}
+
+.primary {
+  background: #0d6b57;
+  border-color: #0d6b57;
+  color: #fff;
+}
+
+.secondary {
+  background: #254f7a;
+  border-color: #254f7a;
+  color: #fff;
+}
+
+.danger {
+  background: #a43831;
+  border-color: #a43831;
+  color: #fff;
+}
+
+.error {
+  color: #a43831;
+  font-weight: 700;
+}
+
+.status, .score {
+  font-size: 1.2rem;
+  font-weight: 800;
+}
+
+.spinner {
+  width: 36px;
+  height: 36px;
+  margin: 20px auto 0;
+  border: 4px solid #cbd3df;
+  border-top-color: #0d6b57;
+  border-radius: 50%;
+  animation: spin 1s linear infinite;
+}
+
+@keyframes spin {
+  to { transform: rotate(360deg); }
+}
+
+.quiz-panel h1 {
+  font-size: clamp(1.5rem, 4vw, 2.5rem);
+}
+
+.topline {
+  display: flex;
+  justify-content: space-between;
+  gap: 16px;
+  align-items: center;
+  font-weight: 800;
+}
+
+.bar {
+  height: 12px;
+  background: #e0e6ef;
+  border-radius: 999px;
+  overflow: hidden;
+  margin: 12px 0 24px;
+}
+
+.bar span {
+  display: block;
+  height: 100%;
+  width: 100%;
+  background: #0d6b57;
+  transition: width 0.2s linear;
+}
+
+.answers {
+  display: grid;
+  gap: 12px;
+}
+
+.answer {
+  display: grid;
+  grid-template-columns: 42px 1fr;
+  gap: 12px;
+  min-height: 68px;
+  align-items: center;
+  text-align: left;
+  background: #fff;
+}
+
+.answer strong {
+  display: grid;
+  place-items: center;
+  width: 36px;
+  height: 36px;
+  border-radius: 50%;
+  background: #254f7a;
+  color: #fff;
+}
+
+.histogram {
+  display: grid;
+  gap: 10px;
+  margin: 16px 0;
+}
+
+.hist-row {
+  display: grid;
+  grid-template-columns: 72px 1fr 48px;
+  gap: 10px;
+  align-items: center;
+}
+
+meter {
+  width: 100%;
+}
+
+.leaderboard {
+  display: grid;
+  gap: 8px;
+  padding-left: 0;
+  list-style: none;
+}
+
+.leaderboard li {
+  display: flex;
+  justify-content: space-between;
+  gap: 16px;
+  padding: 10px 0;
+  border-bottom: 1px solid #e2e7ee;
+}
+
+.celebration {
+  outline: 6px solid #f2c94c;
+}
+
+.admin-layout {
+  display: grid;
+  grid-template-columns: 280px 1fr;
+  min-height: 100vh;
+}
+
+.sidebar {
+  padding: 20px;
+  background: #223044;
+  color: #fff;
+}
+
+.sidebar .list {
+  display: grid;
+  gap: 8px;
+  margin-bottom: 24px;
+}
+
+.sidebar button {
+  width: 100%;
+  text-align: left;
+}
+
+.workspace {
+  padding: 24px;
+}
+
+.toolbar {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 10px;
+  margin: 16px 0;
+}
+
+.roster {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px;
+}
+
+.roster span {
+  border: 1px solid #ccd4df;
+  border-radius: 999px;
+  padding: 6px 10px;
+}
+
+.qr {
+  width: min(280px, 100%);
+  height: auto;
+  background: #fff;
+  padding: 12px;
+}
+
+@media (max-width: 720px) {
+  .shell, .workspace {
+    padding: 14px;
+  }
+
+  .admin-layout {
+    grid-template-columns: 1fr;
+  }
+
+  .sidebar {
+    position: static;
+  }
+
+  .panel {
+    padding: 18px;
+  }
+}
+
+@media (prefers-color-scheme: dark) {
+  :root, body {
+    background: #10141b;
+    color: #edf1f7;
+  }
+
+  .panel, input, textarea, select, .answer {
+    background: #171d27;
+    color: #edf1f7;
+    border-color: #344052;
+  }
+
+  button, .button {
+    background: #263246;
+    color: #edf1f7;
+    border-color: #4a586d;
+  }
+}