:root {
  --bg: #0f1117;
  --surface: #161b22;
  --border: #30363d;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #238636;
  --accent-hover: #2ea043;
  --primary: #1f6feb;
  --danger: #f85149;
  --font: "Segoe UI", system-ui, sans-serif;
  --mono: "Cascadia Code", "Fira Code", Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
}

.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  padding: 10px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-right: auto;
}

.brand h1 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0;
}

.logo {
  font-size: 1.25rem;
  opacity: 0.9;
}

.room-controls,
.run-controls {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

input,
select {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 0.875rem;
}

input:focus,
select:focus {
  outline: 2px solid var(--primary);
  border-color: transparent;
}

.btn {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 6px;
  padding: 6px 12px;
  cursor: pointer;
  font-size: 0.875rem;
}

.btn:hover:not(:disabled) {
  border-color: var(--muted);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn.primary {
  background: var(--primary);
  border-color: var(--primary);
}

.btn.accent {
  background: var(--accent);
  border-color: var(--accent);
}

.btn.accent:hover:not(:disabled) {
  background: var(--accent-hover);
}

.btn.ghost {
  background: transparent;
  font-size: 0.75rem;
  padding: 4px 8px;
}

.workspace {
  display: grid;
  grid-template-columns: 220px 1fr 320px;
  flex: 1;
  min-height: 0;
}

.sidebar {
  border-right: 1px solid var(--border);
  padding: 12px;
  overflow-y: auto;
  background: var(--surface);
}

.sidebar h2 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin: 0 0 8px;
}

.sidebar section + section {
  margin-top: 20px;
}

.muted {
  color: var(--muted);
  font-size: 0.875rem;
}

.share-link {
  display: block;
  font-size: 0.7rem;
  word-break: break-all;
  background: var(--bg);
  padding: 8px;
  border-radius: 6px;
  border: 1px solid var(--border);
}

.user-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.user-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  padding: 4px 0;
}

.user-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.editor-panel {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.editor {
  flex: 1;
  min-height: 0;
}

.console-panel {
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  background: #0d1117;
}

.console-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
}

.console-header h2 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin: 0;
}

.console {
  flex: 1;
  margin: 0;
  padding: 12px;
  overflow: auto;
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.45;
  white-space: pre-wrap;
  word-break: break-word;
}

.console .line-status {
  color: var(--muted);
}

.console .line-error {
  color: var(--danger);
}

.console .line-result {
  color: var(--text);
}

.stdin-block {
  border-top: 1px solid var(--border);
  padding: 8px 12px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.stdin-block label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}

.stdin-block textarea {
  width: 100%;
  resize: vertical;
  min-height: 72px;
  font-family: var(--mono);
  font-size: 0.8rem;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 8px;
}

.limits-info {
  font-size: 0.75rem;
  line-height: 1.4;
}

.hidden {
  display: none !important;
}

.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-card {
  width: 100%;
  max-width: 360px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.login-card h1 {
  margin: 0;
  font-size: 1.25rem;
}

.login-error {
  color: var(--danger);
  font-size: 0.875rem;
  margin: 0;
}

.btn.full {
  width: 100%;
  margin-top: 4px;
}

@media (max-width: 960px) {
  .workspace {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr 200px;
  }

  .sidebar {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .console-panel {
    border-left: none;
    border-top: 1px solid var(--border);
  }
}