:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a26;
  --bg-hover: #22222f;
  --text-primary: #e0dfe6;
  --text-secondary: #8a8999;
  --text-muted: #55546a;
  --border: #2a2a3a;
  --accent: #7b6fde;
  --accent-dim: #5a4fb8;
  --human-accent: #6fa8de;
  --agent-vera: #de9f6f;
  --agent-marsh: #6fde8f;
  --agent-kael: #de6f7b;
  --agent-lumen: #c46fde;
  --fork-accent: #dece6f;
  --system-color: #55546a;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
  background: var(--bg-primary);
  color: var(--text-primary);
  height: 100vh;
  overflow: hidden;
  font-size: 14px;
  line-height: 1.6;
}

.hidden { display: none !important; }

/* ── Entry Gate ── */
#entry-gate {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  padding: 20px;
}

.entry-container { max-width: 560px; text-align: center; }

.entry-container h1 {
  font-size: 2.4rem;
  font-weight: 300;
  letter-spacing: 0.3em;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  margin-bottom: 40px;
}

.entry-description { text-align: left; margin-bottom: 40px; }

.entry-description p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 0.9rem;
  line-height: 1.7;
}

.entry-form { display: flex; gap: 12px; }

#name-input {
  flex: 1;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s;
}

#name-input:focus { border-color: var(--accent-dim); }
#name-input::placeholder { color: var(--text-muted); }

#enter-btn {
  padding: 12px 24px;
  background: var(--accent-dim);
  border: none;
  border-radius: 6px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.2s;
  white-space: nowrap;
}

#enter-btn:hover { background: var(--accent); }

/* ── World Interface ── */
#world-interface { display: flex; height: 100vh; }

/* ── Sidebar ── */
#sidebar {
  width: 240px;
  min-width: 240px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  padding: 20px 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-section h2 {
  font-size: 1.1rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  margin-bottom: 16px;
}

.sidebar-section h3 {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

#world-stats { display: flex; flex-direction: column; gap: 8px; }

.stat { display: flex; justify-content: space-between; font-size: 0.8rem; }
.stat-label { color: var(--text-secondary); }
.stat-value { color: var(--text-primary); font-weight: 500; }

#inhabitant-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.inhabitant-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 4px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: background 0.15s;
}

.inhabitant-item:hover { background: var(--bg-hover); }

.inhabitant-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.inhabitant-dot.human { background: var(--human-accent); }
.inhabitant-name { color: var(--text-primary); }
.inhabitant-kind { color: var(--text-muted); font-size: 0.7rem; margin-left: auto; }

.physics-list { list-style: none; display: flex; flex-direction: column; gap: 4px; }
.physics-list li { font-size: 0.75rem; color: var(--text-muted); padding: 2px 0; }
.physics-list li::before { content: '□ '; color: var(--accent-dim); }

/* ── Message Area ── */
#message-area { flex: 1; display: flex; flex-direction: column; min-width: 0; }

#message-stream {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

#message-stream::-webkit-scrollbar { width: 6px; }
#message-stream::-webkit-scrollbar-track { background: transparent; }
#message-stream::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.message {
  padding: 8px 12px;
  border-radius: 4px;
  max-width: 85%;
  animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.message-header {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 4px;
  font-size: 0.75rem;
}

.message-sender { font-weight: 600; font-size: 0.8rem; }
.message-target { color: var(--text-muted); font-size: 0.7rem; }
.message-seq { color: var(--text-muted); font-size: 0.65rem; margin-left: auto; }

.message-content {
  color: var(--text-primary);
  line-height: 1.6;
  word-wrap: break-word;
}

.message-meta {
  display: flex;
  gap: 8px;
  margin-top: 4px;
  font-size: 0.65rem;
  color: var(--text-muted);
}

.message[data-sender="Vera"] .message-sender { color: var(--agent-vera); }
.message[data-sender="Marsh"] .message-sender { color: var(--agent-marsh); }
.message[data-sender="Kael"] .message-sender { color: var(--agent-kael); }
.message[data-sender="Lumen"] .message-sender { color: var(--agent-lumen); }
.message.human .message-sender { color: var(--human-accent); }

.message.fork { border-left: 2px solid var(--fork-accent); }
.message.fork .message-meta::after {
  content: 'fork';
  color: var(--fork-accent);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.system-message {
  text-align: center;
  padding: 8px;
  color: var(--system-color);
  font-size: 0.75rem;
  font-style: italic;
}

/* ── Input Area ── */
#input-area {
  padding: 12px 24px 16px;
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
}

#reply-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  margin-bottom: 8px;
  background: var(--bg-tertiary);
  border-radius: 4px;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

#reply-indicator #reply-to-text {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#cancel-reply {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1rem;
  padding: 0 4px;
}

#target-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
  font-size: 0.75rem;
}

#target-label { color: var(--text-muted); }

#change-target {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 3px;
  transition: border-color 0.15s;
}

#change-target:hover { border-color: var(--accent-dim); color: var(--text-secondary); }

.input-row { display: flex; gap: 8px; align-items: flex-end; }

#message-input {
  flex: 1;
  padding: 10px 14px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.9rem;
  line-height: 1.5;
  resize: none;
  outline: none;
  max-height: 120px;
  transition: border-color 0.2s;
}

#message-input:focus { border-color: var(--accent-dim); }
#message-input::placeholder { color: var(--text-muted); }

#send-btn {
  padding: 10px 16px;
  background: var(--accent-dim);
  border: none;
  border-radius: 6px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s;
  flex-shrink: 0;
}

#send-btn:hover { background: var(--accent); }

.input-hint {
  margin-top: 6px;
  font-size: 0.65rem;
  color: var(--text-muted);
  text-align: center;
  font-style: italic;
}

/* ── Target Modal ── */
#target-modal {
  position: fixed;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  min-width: 200px;
  z-index: 100;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

#target-modal h4 {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.target-option {
  display: block;
  width: 100%;
  padding: 8px 10px;
  background: none;
  border: none;
  border-radius: 4px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.8rem;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s;
}

.target-option:hover { background: var(--bg-hover); }
.target-option.active { background: var(--bg-tertiary); color: var(--accent); }

@media (max-width: 768px) {
  #sidebar { display: none; }
  #message-stream { padding: 12px 16px; }
  #input-area { padding: 10px 16px 14px; }
}