:root {
  --bg: #10141c;
  --panel: #19202b;
  --line: #2a3442;
  --text: #d9dee6;
  --muted: #8b95a5;
  --accent: #8fb3c9;
  --warn: #e8b06a;
  color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.7 -apple-system, "PingFang SC", "Noto Sans SC", sans-serif;
}

main {
  max-width: 560px;
  margin: 0 auto;
  padding: 48px 16px;
}

h1 {
  margin: 0;
  font-weight: 300;
  font-size: 40px;
  letter-spacing: 0.2em;
}

.sub, .usage { color: var(--muted); }
.usage { font-size: 13px; margin-top: 24px; }

.modes {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 12px;
  margin: 32px 0;
}

.modes button {
  padding: 18px 14px;
  text-align: left;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 14px;
  font: inherit;
  cursor: pointer;
}
.modes button:hover { border-color: var(--accent); }
.modes b { display: block; font-size: 18px; font-weight: 500; }
.modes small { color: var(--muted); }

.settings { color: var(--muted); }
.settings summary { cursor: pointer; }
.settings label { display: block; margin: 12px 0; }
select, input[type=range] { margin-left: 8px; vertical-align: middle; }
select, input, button { font: inherit; }

#session { text-align: center; padding-top: 12vh; }

.status { color: var(--muted); font-size: 15px; letter-spacing: 0.1em; }
.caption { min-height: 3.4em; font-size: 22px; font-weight: 300; color: var(--text); transition: opacity 1s; }
.heard { min-height: 1.7em; color: var(--accent); }

.reply { display: flex; gap: 8px; margin: 24px 0; }
.reply input {
  flex: 1;
  min-width: 0;
  padding: 10px 12px;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 10px;
}
.reply button, .exit {
  padding: 10px 14px;
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 10px;
  cursor: pointer;
}
.exit { margin-top: 18vh; }

.crisis {
  margin-bottom: 32px;
  padding: 16px;
  border: 1px solid var(--warn);
  border-radius: 12px;
  color: var(--warn);
  font-size: 18px;
}
.crisis a { color: var(--warn); font-weight: 600; }

.mic-row { display: flex; align-items: center; justify-content: center; gap: 10px; color: var(--muted); font-size: 13px; }
.meter { width: 80px; height: 4px; background: var(--line); border-radius: 2px; overflow: hidden; }
.meter i { display: block; height: 100%; width: 0; background: var(--accent); transition: width 0.1s; }
.mic-row select {
  max-width: 220px; margin: 0; padding: 4px 6px;
  background: var(--panel); color: var(--muted); border: 1px solid var(--line); border-radius: 8px; font-size: 13px;
}

.login { max-width: 320px; }
.login-error { min-height: 1.7em; color: var(--warn); }