:root {
  --bg: #05050c;
  --panel: rgba(20, 20, 35, 0.92);
  --accent: #f0c674;
  --text: #e0e0e0;
  --muted: #888;
  --border: rgba(240, 198, 116, 0.25);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.app {
  max-width: 720px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.hero {
  padding: 2rem 1rem;
  text-align: center;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.hero h1 {
  margin: 0;
  font-size: 2.2rem;
  color: var(--accent);
  letter-spacing: 0.1em;
}
.hero p {
  margin: 0.5rem 0 0;
  color: var(--muted);
}

.landing {
  flex: 1;
  padding: 2rem 1rem;
  display: grid;
  gap: 1rem;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
}
.card h2 {
  margin: 0 0 0.5rem;
  color: var(--accent);
  font-size: 1.2rem;
}
.card p {
  margin: 0 0 1rem;
  color: var(--muted);
}

.btn {
  display: inline-block;
  background: rgba(240, 198, 116, 0.15);
  color: var(--accent);
  border: 1px solid var(--border);
  padding: 0.6rem 1.2rem;
  border-radius: 6px;
  text-decoration: none;
}
.btn:hover { background: rgba(240, 198, 116, 0.25); }

.chat-app {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.chat-header {
  padding: 1rem;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.chat-header h1 {
  margin: 0;
  font-size: 1.1rem;
  color: var(--accent);
}
.chat-header a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.85rem;
}

.members {
  padding: 0.5rem 1rem;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--muted);
}
.members span {
  margin-right: 0.8rem;
  color: var(--text);
}
.members span.guide { color: var(--accent); }

.log {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
}

.msg {
  margin-bottom: 0.75rem;
  padding: 0.6rem 0.8rem;
  border-radius: 10px;
  max-width: 85%;
  line-height: 1.4;
}
.msg.user {
  background: rgba(240, 198, 116, 0.12);
  margin-left: auto;
  border: 1px solid rgba(240, 198, 116, 0.15);
}
.msg.nana {
  background: rgba(100, 200, 255, 0.08);
  border-left: 3px solid var(--accent);
}
.msg.mm {
  background: rgba(200, 100, 255, 0.1);
  border-left: 3px solid #c864ff;
}
.msg.system {
  background: rgba(255, 255, 255, 0.05);
  text-align: center;
  max-width: 100%;
  font-size: 0.85rem;
  color: var(--muted);
}

.meta {
  font-size: 0.7rem;
  color: var(--muted);
  margin-top: 0.3rem;
}

.controls {
  padding: 1rem;
  background: var(--panel);
  border-top: 1px solid var(--border);
  display: flex;
  gap: 0.5rem;
}
.controls input {
  flex: 1;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.7rem;
  border-radius: 6px;
  font-size: 1rem;
}
.controls button {
  background: rgba(240, 198, 116, 0.2);
  color: var(--accent);
  border: 1px solid var(--border);
  padding: 0.7rem 1.2rem;
  border-radius: 6px;
  cursor: pointer;
}

.hint {
  font-size: 0.7rem;
  color: var(--muted);
  padding: 0.4rem 1rem;
  text-align: center;
  background: var(--panel);
}

footer {
  padding: 1rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  background: var(--panel);
  border-top: 1px solid var(--border);
}

.settings {
  padding: 0.5rem 1rem;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.settings input {
  flex: 1;
  min-width: 120px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.4rem;
  border-radius: 4px;
  font-size: 0.85rem;
}