:root {
  color-scheme: dark;
  --bg: #0d1114;
  --panel: #161b22;
  --border: #21262d;
  --border-light: #30363d;
  --text: #e6edf3;
  --text-muted: #7d8590;
  --text-dim: #484f58;
  --primary: #58a6ff;
  --primary-hover: #4090e0;
  --danger: #f85149;
}

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

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Centered-card layout ---------- */
.app {
  width: 100%;
  max-width: 400px;
  padding: 40px 32px;
  text-align: center;
}
.app h1 { font-size: 1.6rem; font-weight: 700; margin-bottom: 2px; letter-spacing: -0.5px; }
.app > .tagline { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 36px; font-weight: 400; }

.panel { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.hidden { display: none !important; }

button {
  font-size: 13px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
  width: 100%;
  max-width: 280px;
  font-family: inherit;
  transition: background 0.12s;
}
button:hover { background: #1c2129; }
button.primary { background: #1f6feb; border-color: #1f6feb; color: #fff; }
button.primary:hover { background: #388bfd; }
button.small { font-size: 12px; padding: 5px 10px; border-radius: 5px; max-width: none; width: auto; }
button:disabled { opacity: 0.4; cursor: default; }

input[type="text"], input[type="file"] {
  font-size: 13px;
  padding: 8px 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: #0d1114;
  color: var(--text);
  width: 100%;
  max-width: 280px;
  font-family: inherit;
  transition: border-color 0.12s;
}
input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 2px rgba(31,111,235,0.2); }

.status { color: var(--text-muted); min-height: 1.2em; font-size: 13px; }
.progress { width: 100%; max-width: 280px; display: flex; flex-direction: column; gap: 6px; }
progress { width: 100%; height: 6px; border-radius: 3px; }
progress::-webkit-progress-bar { background: var(--border); border-radius: 3px; }
progress::-webkit-progress-value { background: var(--primary); border-radius: 3px; }

/* ---------- P2P panels ---------- */
#input-room-code { text-align: center; letter-spacing: 0.2em; text-transform: uppercase; }
#qr-container svg { width: 200px; height: 200px; background: #fff; padding: 10px; border-radius: 8px; }

.drop-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  width: 100%;
  max-width: 320px;
  padding: 24px 16px;
  border: 2px dashed var(--border-light);
  border-radius: 10px;
  transition: border-color 0.15s, background 0.15s;
}
.drop-zone p { color: var(--text-muted); font-size: 13px; margin: 0; }
.drop-zone.dragover { border-color: var(--primary); background: rgba(88, 166, 255, 0.06); }

#clipboard-widget {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
#remembered-peers-list { display: flex; flex-direction: column; gap: 6px; width: 100%; max-width: 280px; }
.remembered-peer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
}
.remembered-peer-label { flex: 1; text-align: left; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 13px; }
.remembered-peer-actions { display: flex; gap: 4px; }
.remembered-peer-actions button { width: auto; max-width: none; padding: 4px 8px; font-size: 11px; }

#clipboard-received-text {
  max-width: 280px;
  word-break: break-word;
  color: var(--text-muted);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  max-height: 5em;
  overflow-y: auto;
  font-size: 12px;
}
#panel-error p { color: var(--danger); }

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-light); }

/* ---------- Mobile ---------- */
@media (max-width: 680px) {
  .app { padding: 28px 18px; }
  button, input[type="text"], input[type="file"],
  #remembered-peers-list, #clipboard-received-text { max-width: 320px; }

  /* iOS Safari auto-zooms the whole page on focusing any form field under
     16px -- jarring on tapping the manual pairing-code field. */
  input[type="text"] { font-size: 16px; }

  button.small { padding: 9px 13px; }
}