feat(ui): add navigation layout and basic styling

Implement foundational UI components including navigation bar,
CSS styling, and improved rankings page.

Changes:
- Add navigation bar with links to Rankings, Profile, Schedule, Admin
- Add comprehensive CSS styling for tables, forms, buttons, alerts
- Improve rankings page with profile links
- Support conditional navigation based on authentication status

app/assets/css/app.css

@@ -1,5 +1,518 @@
 body {
   background-color: #fff;
   color: #000;
-  font-family: sans-serif;
+  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
+  margin: 0;
+  padding: 0;
+}
+
+/* Navigation */
+.main-nav {
+  background-color: #2d5a27;
+  color: white;
+  padding: 1rem 2rem;
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
+}
+
+.nav-brand a {
+  color: white;
+  text-decoration: none;
+  font-size: 1.5rem;
+  font-weight: bold;
+}
+
+.nav-links {
+  display: flex;
+  gap: 1.5rem;
+}
+
+.nav-links a {
+  color: white;
+  text-decoration: none;
+  opacity: 0.9;
+  transition: opacity 0.2s;
+}
+
+.nav-links a:hover {
+  opacity: 1;
+}
+
+.nav-user {
+  display: flex;
+  gap: 1rem;
+  align-items: center;
+}
+
+.nav-user span {
+  opacity: 0.8;
+}
+
+.nav-user a {
+  color: white;
+  text-decoration: none;
+  opacity: 0.9;
+}
+
+/* Main Content */
+.main-content {
+  max-width: 1200px;
+  margin: 0 auto;
+  padding: 2rem;
+}
+
+/* Tables */
+table {
+  width: 100%;
+  border-collapse: collapse;
+  margin: 1rem 0;
+}
+
+th, td {
+  padding: 0.75rem;
+  text-align: left;
+  border-bottom: 1px solid #ddd;
+}
+
+th {
+  background-color: #f5f5f5;
+  font-weight: 600;
+}
+
+tr:hover {
+  background-color: #f9f9f9;
+}
+
+/* Links */
+a {
+  color: #2d5a27;
+  text-decoration: none;
+}
+
+a:hover {
+  text-decoration: underline;
+}
+
+/* Headings */
+h1, h2, h3 {
+  color: #2d5a27;
+}
+
+/* Buttons */
+button, .btn {
+  background-color: #2d5a27;
+  color: white;
+  border: none;
+  padding: 0.5rem 1rem;
+  border-radius: 4px;
+  cursor: pointer;
+  text-decoration: none;
+  display: inline-block;
+}
+
+button:hover, .btn:hover {
+  background-color: #1e3d1a;
+}
+
+/* Forms */
+input, select, textarea {
+  padding: 0.5rem;
+  border: 1px solid #ddd;
+  border-radius: 4px;
+  font-size: 1rem;
+}
+
+input:focus, select:focus, textarea:focus {
+  outline: none;
+  border-color: #2d5a27;
+}
+
+/* Profile Stats Grid */
+.profile-stats {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
+  gap: 1rem;
+  margin: 1rem 0;
+}
+
+.stat {
+  background: #f9f9f9;
+  padding: 1rem;
+  border-radius: 8px;
+  text-align: center;
+}
+
+.stat .label {
+  display: block;
+  font-size: 0.875rem;
+  color: #666;
+  margin-bottom: 0.5rem;
+}
+
+.stat .value {
+  font-size: 1.5rem;
+  font-weight: bold;
+  color: #2d5a27;
+}
+
+/* Partnership Table */
+.partnerships-table {
+  margin: 1rem 0;
+}
+
+.confidence-high {
+  color: #2d5a27;
+}
+
+.confidence-medium {
+  color: #c9a227;
+}
+
+.confidence-low {
+  color: #999;
+}
+
+/* Game Cards */
+.recent-games {
+  display: flex;
+  flex-direction: column;
+  gap: 0.5rem;
+}
+
+.game {
+  padding: 1rem;
+  border-radius: 8px;
+  border-left: 4px solid #999;
+}
+
+.game.won {
+  background-color: #e8f5e9;
+  border-left-color: #2d5a27;
+}
+
+.game.lost {
+  background-color: #ffebee;
+  border-left-color: #c62828;
+}
+
+.game-date {
+  font-size: 0.875rem;
+  color: #666;
+  margin-bottom: 0.5rem;
+}
+
+.game-teams {
+  display: flex;
+  align-items: center;
+  gap: 1rem;
+  font-weight: 500;
+}
+
+.game-score {
+  font-weight: bold;
+  color: #333;
+}
+
+.game-partner {
+  font-size: 0.875rem;
+  color: #666;
+  margin-top: 0.5rem;
+}
+
+/* Schedule Styles */
+.schedule-container {
+  display: flex;
+  flex-direction: column;
+  gap: 2rem;
+}
+
+section {
+  margin-bottom: 2rem;
+}
+
+section h2 {
+  border-bottom: 2px solid #2d5a27;
+  padding-bottom: 0.5rem;
+  margin-bottom: 1rem;
+}
+
+/* Match Cards */
+.matches-list {
+  display: flex;
+  flex-direction: column;
+  gap: 1rem;
+}
+
+.match-card {
+  display: flex;
+  align-items: center;
+  padding: 1rem;
+  background: #f9f9f9;
+  border-radius: 8px;
+  gap: 1rem;
+}
+
+.match-date {
+  min-width: 120px;
+  font-size: 0.875rem;
+  color: #666;
+}
+
+.match-details {
+  flex: 1;
+}
+
+.teams {
+  display: flex;
+  align-items: center;
+  gap: 1rem;
+}
+
+.team {
+  padding: 0.5rem 1rem;
+  border-radius: 4px;
+}
+
+.your-team {
+  background-color: #e8f5e9;
+  color: #2d5a27;
+  font-weight: 500;
+}
+
+.opponent-team {
+  background-color: #f5f5f5;
+}
+
+.vs {
+  color: #999;
+  font-size: 0.875rem;
+}
+
+.match-actions {
+  min-width: 120px;
+  text-align: right;
+}
+
+.btn-small {
+  padding: 0.25rem 0.75rem;
+  font-size: 0.875rem;
+}
+
+/* Tournament Cards */
+.tournaments-list {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
+  gap: 1rem;
+}
+
+.tournament-card {
+  display: flex;
+  align-items: center;
+  padding: 1rem;
+  background: #f9f9f9;
+  border-radius: 8px;
+  gap: 1rem;
+}
+
+.tournament-info {
+  flex: 1;
+}
+
+.tournament-info h3 {
+  margin: 0 0 0.25rem 0;
+  font-size: 1rem;
+}
+
+.tournament-format {
+  margin: 0;
+  color: #666;
+  font-size: 0.875rem;
+}
+
+.tournament-status {
+  min-width: 80px;
+}
+
+.status-badge {
+  padding: 0.25rem 0.5rem;
+  border-radius: 12px;
+  font-size: 0.75rem;
+  font-weight: 500;
+  text-transform: uppercase;
+}
+
+.status-badge.active {
+  background-color: #e8f5e9;
+  color: #2d5a27;
+}
+
+.status-badge.pending {
+  background-color: #fff3e0;
+  color: #e65100;
+}
+
+/* Schedule by Tournament */
+.schedule-by-tournament {
+  display: flex;
+  flex-direction: column;
+  gap: 1.5rem;
+}
+
+.tournament-schedule-item {
+  background: #f9f9f9;
+  padding: 1rem;
+  border-radius: 8px;
+}
+
+.tournament-schedule-item h3 {
+  margin: 0 0 1rem 0;
+  font-size: 1.1rem;
+}
+
+.rounds {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 0.5rem;
+}
+
+.round {
+  display: flex;
+  flex-direction: column;
+  padding: 0.5rem 1rem;
+  background: white;
+  border-radius: 4px;
+  border: 1px solid #ddd;
+}
+
+.round-number {
+  font-weight: 500;
+}
+
+.round-status {
+  font-size: 0.75rem;
+  color: #666;
+  text-transform: capitalize;
+}
+
+/* No matches/tournaments message */
+.no-matches,
+.no-tournaments,
+.no-schedule {
+  color: #666;
+  font-style: italic;
+  padding: 2rem;
+  text-align: center;
+  background: #f9f9f9;
+  border-radius: 8px;
+}
+
+/* Auth Pages */
+.auth-container {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  min-height: calc(100vh - 200px);
+  padding: 2rem;
+}
+
+.auth-card {
+  background: white;
+  padding: 2rem;
+  border-radius: 12px;
+  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
+  width: 100%;
+  max-width: 400px;
+}
+
+.auth-card h1 {
+  text-align: center;
+  margin-bottom: 1.5rem;
+  color: #2d5a27;
+}
+
+.form-group {
+  margin-bottom: 1.25rem;
+}
+
+.form-group label {
+  display: block;
+  margin-bottom: 0.5rem;
+  font-weight: 500;
+  color: #333;
+}
+
+.form-group input[type="email"],
+.form-group input[type="password"],
+.form-group input[type="text"] {
+  width: 100%;
+  padding: 0.75rem;
+  border: 1px solid #ddd;
+  border-radius: 6px;
+  font-size: 1rem;
+  box-sizing: border-box;
+}
+
+.form-group input:focus {
+  outline: none;
+  border-color: #2d5a27;
+  box-shadow: 0 0 0 2px rgba(45, 90, 39, 0.2);
+}
+
+.remember-me label {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  font-weight: normal;
+  cursor: pointer;
+}
+
+.btn-block {
+  width: 100%;
+  padding: 0.75rem;
+  font-size: 1rem;
+  margin-top: 0.5rem;
+}
+
+.btn-primary {
+  background-color: #2d5a27;
+  color: white;
+  border: none;
+  border-radius: 6px;
+  cursor: pointer;
+  transition: background-color 0.2s;
+}
+
+.btn-primary:hover {
+  background-color: #1e3d1a;
+}
+
+.auth-links {
+  margin-top: 1.5rem;
+  text-align: center;
+  font-size: 0.9rem;
+}
+
+.auth-links p {
+  margin: 0.5rem 0;
+}
+
+/* Alerts */
+.alert {
+  padding: 1rem;
+  border-radius: 6px;
+  margin-bottom: 1rem;
+}
+
+.alert-error {
+  background-color: #ffebee;
+  color: #c62828;
+  border: 1px solid #ef9a9a;
+}
+
+.alert-success {
+  background-color: #e8f5e9;
+  color: #2d5a27;
+  border: 1px solid #a5d6a7;
 }

app/templates/layouts/app.html.erb

@@ -3,12 +3,38 @@
   <head>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
-    <title>Euchre camp</title>
+    <title>EuchreCamp</title>
     <%= favicon_tag %>
     <%= stylesheet_tag "app" %>
   </head>
   <body>
-    <%= yield %>
+    <nav class="main-nav">
+      <div class="nav-brand">
+        <a href="/">EuchreCamp</a>
+      </div>
+      <div class="nav-links">
+        <a href="/rankings">Rankings</a>
+        <% if defined?(current_player) && current_player %>
+          <a href="/players/<%= current_player.id %>/profile">My Profile</a>
+          <a href="/players/<%= current_player.id %>/schedule">My Schedule</a>
+          <% if current_player.respond_to?(:admin?) && current_player.admin? %>
+            <a href="/admin">Admin</a>
+          <% end %>
+        <% end %>
+      </div>
+      <div class="nav-user">
+        <% if defined?(current_player) && current_player %>
+          <span><%= current_player.name %></span>
+          <a href="/logout">Logout</a>
+        <% else %>
+          <a href="/login">Login</a>
+          <a href="/register">Register</a>
+        <% end %>
+      </div>
+    </nav>
+    <main class="main-content">
+      <%= yield %>
+    </main>
     <%= javascript_tag "app" %>
   </body>
 </html>

app/templates/players/rankings.html.erb

@@ -8,6 +8,7 @@
         <th>Player</th>
         <th>Elo Rating</th>
         <th>Original Rating</th>
+        <th>Actions</th>
       </tr>
     </thead>
     <tbody>
@@ -17,6 +18,9 @@
           <td><%= player.name %></td>
           <td><strong><%= player.current_elo %></strong></td>
           <td><%= player.rating %></td>
+          <td>
+            <a href="/players/<%= player.id %>/profile">Profile</a>
+          </td>
         </tr>
       <% end %>
     </tbody>