:root {
  color-scheme: light;
  --bg: #f3f4f6;
  --panel: #ffffff;
  --border: #d1d5db;
  --text: #111827;
  --muted: #6b7280;
  --accent: #0f766e;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.app {
  max-width: 980px;
  margin: 32px auto;
  padding: 0 20px 40px;
}

.header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  margin-bottom: 24px;
}

h1 {
  margin: 0;
  font-size: 32px;
}

h2 {
  margin: 0 0 12px;
  font-size: 20px;
}

p {
  margin: 4px 0 0;
  color: var(--muted);
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.04);
}

.hero {
  text-align: center;
  padding: 28px;
}

.cta {
  font-size: 16px;
  padding: 12px 20px;
}

.hint {
  margin-top: 12px;
  font-size: 13px;
  color: var(--muted);
}

.row {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

input,
textarea {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 14px;
  flex: 1;
  min-width: 200px;
}

button {
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 10px;
  padding: 10px 14px;
  font-weight: 600;
  cursor: pointer;
}

button.secondary {
  background: #e5e7eb;
  color: #111827;
}

.status {
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px;
  white-space: pre-wrap;
}

.peers {
  display: grid;
  gap: 10px;
}

.peer {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.peer span {
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  color: var(--muted);
}

.qr img {
  width: 220px;
  height: 220px;
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-top: 12px;
}

.hidden {
  display: none;
}

@media (max-width: 720px) {
  .header {
    flex-direction: column;
    align-items: flex-start;
  }
}