:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel2: #1f232c;
  --line: #2a2f3a;
  --text: #e7ecf3;
  --muted: #8a93a4;
  --accent: #6ea8ff;
  --accent2: #4cd0a4;
  --warn: #f0b65a;
  --danger: #ef6b6b;
  --radius: 10px;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  max-width: 100vw;
}
body {
  font: 15px/1.5 -apple-system, "Segoe UI", system-ui, Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
}
/* Defend against long unbreakable tokens (code chips, URLs, hashes) blowing out the layout. */
.landing-info, .landing-info * {
  overflow-wrap: break-word;
  word-wrap: break-word;
}
img, svg { max-width: 100%; }

button {
  font: inherit;
  color: var(--text);
  background: var(--panel2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 6px 12px;
  cursor: pointer;
}
button:hover { border-color: var(--accent); }
button:disabled { opacity: 0.5; cursor: not-allowed; }
button.primary { background: var(--accent); color: #0a1020; border-color: transparent; font-weight: 600; }
button.danger { color: var(--danger); }
button.ghost { background: transparent; color: var(--muted); }
button.ghost:hover { color: var(--text); border-color: var(--accent); }

input[type="text"], input:not([type]) {
  font: inherit;
  color: var(--text);
  background: var(--panel2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 6px 10px;
  min-width: 120px;
}
input:focus { outline: none; border-color: var(--accent); }

code { font-family: ui-monospace, "Cascadia Code", Consolas, monospace; }

.muted { color: var(--muted); }
.small { font-size: 12px; }
.hint { color: var(--muted); font-size: 13px; margin: 8px 0 0; }

.top {
  display: flex; align-items: center; gap: 16px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  flex-wrap: wrap;
}
.brand {
  font-weight: 700; letter-spacing: 0.5px; color: var(--accent); text-decoration: none;
  display: inline-flex; align-items: center; gap: 8px;
}
.brand:hover { color: var(--accent2); }
.brand-icon { display: block; }
.brand-svg { display: block; height: 56px; width: auto; max-width: 100%; }
.landing-top { padding: 18px 20px; align-items: center; }
@media (max-width: 720px) {
  .brand-svg { height: 44px; }
}
.share-info, .me { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.me { margin-left: auto; }
.share-chip {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--panel2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 4px 10px;
}
.share-chip code {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--accent);
}
.share-chip:nth-child(2) code { color: var(--accent2); }
.tagline { font-size: 13px; }

.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.dot.online { background: var(--accent2); box-shadow: 0 0 0 3px rgba(76,208,164,0.15); }
.dot.offline { background: var(--muted); }

main {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 16px;
  padding: 16px 20px;
  max-width: 1100px;
  margin: 0 auto;
}
.sidebar { display: flex; flex-direction: column; gap: 16px; min-width: 0; }
@media (max-width: 720px) {
  main { grid-template-columns: 1fr; }
}

.chat-log {
  height: 220px;
  overflow-y: auto;
  background: var(--panel2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 13px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 8px;
}
.chat-log:empty::before {
  content: "No messages yet.";
  color: var(--muted);
  font-style: italic;
}
.chat-msg { line-height: 1.4; word-wrap: break-word; }
.chat-msg .chat-name { font-weight: 600; color: var(--accent); margin-right: 6px; }
.chat-msg.me .chat-name { color: var(--accent2); }
.chat-msg.system { color: var(--muted); font-style: italic; }
.chat-form { display: flex; gap: 6px; }
.chat-form input { flex: 1; min-width: 0; }

section { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; }
h2 { font-size: 14px; text-transform: uppercase; letter-spacing: 0.8px; color: var(--muted); margin: 0 0 10px; font-weight: 600; }

#peerList, #fileList { list-style: none; padding: 0; margin: 0; }

#peerList li {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 6px;
  border-radius: 8px;
}
#peerList li + li { border-top: 1px solid var(--line); }
#peerList .peer-name { font-weight: 500; }
#peerList .peer-id { color: var(--muted); font-size: 12px; }
#peerList .peer-self { color: var(--accent2); font-size: 12px; }
.peer-serial {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 22px;
  padding: 0 6px;
  border-radius: 5px;
  background: var(--panel2);
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
}

.file-recipients {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 6px;
}
.recip {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
}
.recip-no {
  font-size: 11px;
  color: var(--muted);
  font-weight: 700;
}
.recip-status {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 20px;
  padding: 0 5px;
  border-radius: 4px;
  background: var(--panel2);
  border: 1px solid var(--line);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
}
.recip-status.f { color: var(--accent); border-color: rgba(110,168,255,0.45); }
.recip-status.d { color: var(--accent2); border-color: rgba(76,208,164,0.45); background: rgba(76,208,164,0.08); }

.dropzone {
  border: 2px dashed var(--line);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  margin-bottom: 14px;
  transition: border-color 0.15s, background 0.15s;
}
.dropzone.over { border-color: var(--accent); background: rgba(110,168,255,0.06); }

#fileList li {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px 12px;
  padding: 10px 6px;
  align-items: center;
}
#fileList li + li { border-top: 1px solid var(--line); }
.file-main { min-width: 0; }
.file-name { font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-meta { font-size: 12px; color: var(--muted); margin-top: 2px; }
.file-actions { display: flex; gap: 6px; align-items: center; }
.progress {
  grid-column: 1 / -1;
  height: 4px;
  background: var(--panel2);
  border-radius: 2px;
  overflow: hidden;
  display: none;
}
.progress.show { display: block; }
.progress > div {
  height: 100%;
  background: var(--accent);
  width: 0%;
  transition: width 0.1s linear;
}
.xfer-info {
  grid-column: 1 / -1;
  font-size: 12px;
  color: var(--muted);
  display: none;
  margin-top: 2px;
  line-height: 1.45;
}
.xfer-info.show { display: block; }
.xfer-speed { color: var(--text, inherit); font-variant-numeric: tabular-nums; }
.xfer-eta { font-variant-numeric: tabular-nums; }
.xfer-warning {
  color: var(--warn);
  margin-top: 2px;
  font-size: 11.5px;
}
.badge {
  display: inline-block;
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--panel2);
  color: var(--muted);
  border: 1px solid var(--line);
}
.badge.warn { color: var(--warn); border-color: rgba(240,182,90,0.4); }
.badge.ok { color: var(--accent2); border-color: rgba(76,208,164,0.4); }

.toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
  background: var(--panel2); border: 1px solid var(--line); border-radius: 8px;
  padding: 10px 14px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.4);
  z-index: 10;
}

.error { color: var(--danger); font-size: 13px; margin: 8px 0 0; }

/* ---------- Landing ---------- */
.landing-page main.landing {
  max-width: 760px;
  margin: 40px auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 24px;
  align-items: stretch;
}
.landing-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.landing-card h1 { margin: 0; font-size: 22px; }
.landing-card p { margin: 0; }
.landing-card .field { display: flex; flex-direction: column; gap: 4px; }
.landing-card .field label { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.6px; }
.landing-card .field input {
  font-size: 22px;
  letter-spacing: 4px;
  text-align: center;
  padding: 10px 12px;
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
}
.landing-card form { display: flex; flex-direction: column; gap: 10px; }
button.big { padding: 12px 16px; font-size: 16px; }
.divider {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 1px;
}
.divider span {
  display: inline-block;
  background: var(--panel2);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 10px;
}
.landing-footer {
  text-align: center;
  padding: 20px;
  max-width: 600px;
  margin: 0 auto;
}

.landing-info {
  max-width: 760px;
  margin: 0 auto;
  padding: 8px 20px 32px;
}
.landing-info h2 {
  font-size: 20px;
  color: var(--text);
  text-transform: none;
  letter-spacing: 0;
  margin: 28px 0 10px;
  font-weight: 700;
}
.landing-info h2:first-child { margin-top: 8px; }
.landing-info p {
  color: var(--text);
  line-height: 1.65;
  margin: 0 0 12px;
}
.landing-info ul {
  color: var(--text);
  line-height: 1.65;
  margin: 0 0 12px;
  padding-left: 22px;
}
.landing-info ul li { margin-bottom: 6px; }
.landing-info strong { color: var(--accent); font-weight: 700; }
@media (max-width: 720px) {
  .landing-info { padding: 4px 16px 24px; }
  .landing-info h2 { font-size: 17px; margin-top: 22px; }
  .landing-info p, .landing-info ul { font-size: 14px; }
}
button.small-btn { padding: 4px 10px; font-size: 12px; margin-top: 6px; }
@media (max-width: 720px) {
  .landing-page main.landing {
    grid-template-columns: 1fr;
    margin: 16px auto;
    padding: 0 14px;
    gap: 12px;
  }
  .divider { padding: 6px 0; }
  .landing-card { padding: 18px; }
  .landing-card h1 { font-size: 19px; }
  .landing-card p { font-size: 13px; }
  .landing-card .field input { font-size: 18px; letter-spacing: 3px; padding: 8px; }
  .landing-card button.big { padding: 10px 14px; font-size: 15px; }
  .landing-top { padding: 12px 14px; }
  .brand-svg { max-width: 100%; }
  .tagline { font-size: 12px; }
  .landing-info { padding: 0 14px 24px; }
  .landing-info h2:first-child { margin-top: 18px; }
}

/* ---------- PIN overlay (room page) ---------- */
.overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
  padding: 20px;
}
.overlay[hidden] { display: none; }
.overlay-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  max-width: 380px;
  width: 100%;
  display: flex; flex-direction: column; gap: 10px;
}
.overlay-card h2 { margin: 0; font-size: 18px; text-transform: none; letter-spacing: 0; color: var(--text); }
.overlay-card code { background: var(--panel2); padding: 2px 8px; border-radius: 5px; color: var(--accent); font-weight: 700; }
.overlay-card form { display: flex; gap: 8px; }
.overlay-card input {
  flex: 1;
  font-size: 22px;
  text-align: center;
  letter-spacing: 6px;
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
}

/* Report card overrides the size; wider, with a large textarea */
.overlay-card.report-card { max-width: 720px; }
.overlay-card.report-card h2 { color: var(--text); }
#reportText {
  width: 100%;
  min-height: 320px;
  max-height: 60vh;
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 12px;
  background: var(--panel2);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  resize: vertical;
  white-space: pre;
  letter-spacing: 0;
  text-align: left;
}
.report-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.report-actions button { flex: 0 0 auto; }

/* ---------- Mobile room layout: fit on one screen, files first ---------- */
@media (max-width: 720px) {
  /* Header: pack as compactly as possible */
  body { font-size: 14px; }
  .top {
    padding: 6px 10px;
    gap: 6px;
    row-gap: 6px;
  }
  /* Two-row header: row 1 = brand + name+dot, row 2 = code/pin/buttons */
  .brand { order: 1; gap: 4px; }
  .brand span { font-size: 14px; }
  .me { order: 2; gap: 4px; margin-left: auto; }
  .me .muted { display: none; }
  #nameInput {
    font-size: 12px;
    padding: 4px 6px;
    min-width: 80px;
    max-width: 110px;
  }

  .share-info { order: 3; flex: 1 1 100%; gap: 6px; min-width: 0; flex-wrap: wrap; }
  .share-chip {
    padding: 2px 6px;
    gap: 4px;
  }
  .share-chip code { font-size: 13px; letter-spacing: 1px; }
  .share-chip .muted.small { font-size: 9px; }

  .top button {
    padding: 4px 10px;
    font-size: 12px;
  }
  /* "Copy code & PIN" → just "Copy" on mobile */
  #copyBtn { font-size: 0; line-height: 1; }
  #copyBtn::after { content: "Copy"; font-size: 12px; font-weight: 400; }

  /* Main: files come first, sidebar (peers + chat) below */
  main {
    grid-template-columns: 1fr;
    padding: 8px;
    gap: 8px;
  }
  .sidebar { order: 2; gap: 8px; }
  main > section.files { order: 1; }

  section { padding: 10px 12px; }
  h2 { margin-bottom: 6px; font-size: 12px; }

  /* Compact drop zone */
  .dropzone { padding: 12px; margin-bottom: 8px; }
  .dropzone p { margin: 2px 0; font-size: 13px; }
  .dropzone .hint { font-size: 11px; }

  /* Compact chat */
  .chat-log { height: 100px; padding: 6px 8px; }
  .chat-form input { padding: 4px 8px; font-size: 13px; }

  /* Compact peers */
  .peers .hint { display: none; }
  #peerList li { padding: 4px 6px; gap: 8px; }
  #peerList .peer-id { display: none; }

  /* Compact files list */
  #fileList li { padding: 6px 4px; gap: 6px 8px; }
  .file-name { font-size: 14px; }
  .file-meta { font-size: 11px; }
}