:root {
  --bg-dark: #2a2a2a;
  --bg-medium: #3a3a3a;
  --bg-light: #444;
  --accent: #00bcd4;
  --text: #fff;
  --muted: #ccc;
}

body {
  margin: 0;
  height: 100vh;
  display: grid;
  grid-template-rows: 70px 1fr;
  grid-template-columns: 1fr 2fr 1fr;
  grid-template-areas:
    "header header header"
    "left center right";
  background: var(--bg-dark);
  color: var(--text);
  font-family: 'Segoe UI', Arial, sans-serif;
  overflow: hidden; /* prevent page scroll */
}

header {
  grid-area: header;
  background: var(--bg-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 30px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
  font-size: 26px;
  font-weight: bold;
  color: var(--text);
}

.header-right {
  font-size: 16px;
  color: var(--accent);
}

.left-panel {
  grid-area: left;
  background: var(--bg-medium);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: stretch;
  padding: 20px;
  gap: 10px;
  border-right: 2px solid #555;
  box-shadow: inset -3px 0 6px rgba(0,0,0,0.3);
  overflow: hidden;
}

.left-panel h3 {
  margin: 0 0 10px 0;
  text-align: center;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 5px;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  background: #444;
  padding: 10px;
  padding-right: 5px;
  border-radius: 6px;
  margin-bottom: 10px;
  white-space: pre-wrap; /* preserve line breaks */
  word-wrap: break-word;
  word-break: break-word; /* ensure long words wrap */
}

.chat-messages div {
  background: #555;
  padding: 6px 10px;
  margin-bottom: 6px;
  border-radius: 6px;
  word-wrap: break-word;
  white-space: pre-wrap; /* wrap long text */
  color: var(--text);
  font-size: 14px;
}

.chat-messages div.self {
  background: var(--accent);
  color: #000;
  align-self: flex-end;
}

.chat-input {
  display: flex;
  gap: 5px;
}

.chat-input input {
  flex: 1;
  padding: 8px;
  border-radius: 6px;
  border: none;
  font-size: 16px;
}

.chat-input button {
  background: var(--accent);
  border: none;
  color: white;
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
}

.center {
  grid-area: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.right-panel {
  grid-area: right;
  background: var(--bg-medium);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  padding: 20px;
  border-left: 2px solid #555;
  box-shadow: inset 3px 0 6px rgba(0,0,0,0.3);
  overflow: hidden;
}

#count {
  font-size: 72px;
  font-weight: bold;
  margin: 20px;
  color: var(--accent);
  text-shadow: 0 0 15px rgba(0, 188, 212, 0.5);
}

button {
  background: var(--accent);
  border: none;
  color: white;
  padding: 12px 25px;
  font-size: 18px;
  border-radius: 10px;
  cursor: pointer;
  transition: 0.2s;
}

button:hover {
  background: #0097a7;
}

#leaderboard {
  width: 100%;
  max-height: calc(100% - 50px); /* leave space for rank + button */
  overflow-y: auto;
  margin-bottom: 10px;
  padding-left: 5px; /* add left padding so scrollbar doesn't cover text */
  box-sizing: border-box;
}

/* Scrollbars for leaderboard & chat */
#leaderboard::-webkit-scrollbar,
.chat-messages::-webkit-scrollbar {
  width: 10px;
}

#leaderboard::-webkit-scrollbar-track,
.chat-messages::-webkit-scrollbar-track {
  background: #3a3a3a;
  border-radius: 4px;
}

#leaderboard::-webkit-scrollbar-thumb,
.chat-messages::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 4px;
}

#leaderboard h3 {
  margin-top: 0;
  text-align: right;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 5px;
  padding-right: 5px;
}

#leaderboard ul {
  list-style: none;
  padding: 0;
  margin: 10px 0 0 0;
  padding-right: 5px;
}

#leaderboard li {
  display: flex;
  justify-content: space-between; /* rank on left, name+score on right */
  align-items: center;
  background: #555;
  margin-bottom: 8px;
  padding: 6px 10px;
  border-radius: 6px;
  color: var(--muted);
  transition: background 0.2s;
  word-break: break-word;
}

#leaderboard li:hover {
  background: #666;
}

#my-rank {
  width: 100%;
  text-align: right;
  margin-bottom: 10px;
}

#change-name {
  width: 100%;
}

.rank {
  flex-shrink: 0;
  font-weight: bold;
  min-width: 25px;
  text-align: left; /* fully left */
  margin-right: 10px;
  color: var(--text);
}

.rank-1 {
  color: gold;
  font-size: 20px;
}

.rank-2 {
  color: silver;
}

.rank-3 {
  color: #cd7f32; /* bronze */
}