:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-alt: #1e222b;
  --border: #2a2f3a;
  --text: #e8eaf0;
  --text-dim: #9399a8;
  --accent: #4f8cff;
  --accent-dim: #2b3a55;
  --good: #35c97a;
  --warn: #e0a83a;
  --bad: #e5546a;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.topbar {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
}
.topbar h1 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
}
.badge {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2px 10px;
}

.layout {
  display: grid;
  grid-template-columns: 1fr 320px 1fr;
  gap: 16px;
  padding: 20px;
  align-items: start;
}

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .pane-code { order: -1; }
}

.pane {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 300px;
}

.pane-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.pane-head h2 {
  margin: 0;
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
}

.status-pill {
  font-size: 11px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 20px;
  background: var(--panel-alt);
  color: var(--text-dim);
  border: 1px solid var(--border);
}
.status-pill.connected { color: var(--good); border-color: var(--good); }
.status-pill.connecting { color: var(--warn); border-color: var(--warn); }
.status-pill.reconnecting { color: var(--warn); border-color: var(--warn); }
.status-pill.failed { color: var(--bad); border-color: var(--bad); }

.section-divider {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  border-top: 1px solid var(--border);
  padding-top: 12px;
  margin-top: 4px;
}

.dropzone {
  border: 2px dashed var(--border);
  border-radius: 10px;
  padding: 22px 12px;
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
  transition: border-color 0.15s, background 0.15s;
}
.dropzone.dragover {
  border-color: var(--accent);
  background: var(--accent-dim);
  color: var(--text);
}
.dropzone p { margin: 0; }

.link-btn {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font: inherit;
  padding: 0;
  text-decoration: underline;
}

.file-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 220px;
  overflow-y: auto;
}
.file-list .empty-hint {
  color: var(--text-dim);
  font-size: 12.5px;
  font-style: italic;
}

.file-row {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 13px;
}
.file-row .file-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.file-row .file-size {
  color: var(--text-dim);
  font-size: 11.5px;
  flex-shrink: 0;
}
.file-row .progress-bar {
  height: 3px;
  background: var(--border);
  border-radius: 2px;
  margin-top: 4px;
  overflow: hidden;
}
.file-row .progress-fill {
  height: 100%;
  background: var(--accent);
  width: 0%;
  transition: width 0.15s;
}
.file-row .transfer-stats {
  margin-top: 4px;
  font-size: 11px;
  color: var(--text-dim);
  font-family: "SF Mono", Consolas, monospace;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.status-badge {
  font-size: 10.5px;
  font-weight: 600;
  padding: 1px 8px;
  border-radius: 20px;
  border: 1px solid var(--border);
  color: var(--text-dim);
  flex-shrink: 0;
}
.status-badge.good { color: var(--good); border-color: var(--good); }

.x-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 15px;
  line-height: 1;
  flex-shrink: 0;
}
.x-btn:hover { color: var(--bad); }

.dl-btn {
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 12px;
  cursor: pointer;
  flex-shrink: 0;
}
.dl-btn:hover { background: var(--accent); color: #fff; }
.dl-btn:disabled { opacity: 0.5; cursor: default; }
.dl-btn.done { border-color: var(--good); color: var(--good); background: transparent; }

button:disabled { opacity: 0.45; cursor: not-allowed; }

.primary-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
}
.primary-btn:hover:not(:disabled) { filter: brightness(1.1); }
.primary-btn.full { width: 100%; }

.secondary-btn {
  background: var(--panel-alt);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 14px;
  font-size: 13px;
  cursor: pointer;
}
.secondary-btn:hover:not(:disabled) { border-color: var(--accent); }

.icon-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  border-radius: 6px;
  width: 28px;
  height: 28px;
  cursor: pointer;
}
.icon-btn:hover { color: var(--text); border-color: var(--accent); }

/* ---- code pane ---- */
.pane-code { align-items: stretch; }
.code-block h2 {
  margin: 0 0 12px;
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  text-align: center;
}

.code-display {
  margin-top: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
}
.code-label { font-size: 11px; color: var(--text-dim); text-transform: uppercase; }
.code-value {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.15em;
  font-family: "SF Mono", Consolas, monospace;
}

.share-link-row {
  margin-top: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-dim);
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
}
.share-link {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: monospace;
}

.divider-or {
  text-align: center;
  color: var(--text-dim);
  font-size: 12px;
  margin: 18px 0 10px;
  position: relative;
}

.join-row {
  display: flex;
  gap: 8px;
}
.join-row input {
  flex: 1;
  background: var(--panel-alt);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 15px;
  letter-spacing: 0.1em;
  font-family: monospace;
  min-width: 0;
}
.join-row input:focus { outline: none; border-color: var(--accent); }

.conn-status {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 12.5px;
}
.conn-line { color: var(--text-dim); }
.conn-line span { color: var(--text); font-weight: 600; }
.timer-row { color: var(--warn); font-family: monospace; }