:root {
  --bg: #0a0e14;
  --ink: #d7e4ee;
  --faded: #7e8d9c;
  --wire: #243044;
  --cubby: #121a24;
  --accent: #00d9ff;
  --err: #ff6b6b;
  --ok: #3dd68c;
  --ring: #e4b45a;
  --mono: "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
  --sans: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  --serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "SimSun", serif;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.45;
}
body {
  background-image: linear-gradient(180deg, #0d141d 0%, var(--bg) 28%);
}
.sheet {
  max-width: 1080px;
  margin: 0 auto;
  padding: 28px 20px 64px;
}
.mast {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 14px 16px;
  align-items: end;
  padding-bottom: 18px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--wire);
}
.seal {
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 600;
  letter-spacing: 0.12em;
  line-height: 1;
  color: var(--bg);
  background: var(--accent);
  padding: 7px 9px 8px;
}
.mast-copy h1 {
  margin: 0;
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 500;
  color: var(--accent);
}
.mast-copy p {
  margin: 4px 0 0;
  color: var(--faded);
  font-size: 13px;
}
.mast-end {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
}
.slip {
  max-width: 360px;
}
.tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--wire);
}
.tab {
  border: 0;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  padding: 6px 2px;
  margin-right: 14px;
  color: var(--faded);
  background: transparent;
}
.tab.on {
  color: var(--ink);
  border-bottom-color: var(--accent);
}
label {
  display: block;
  margin: 10px 0;
  color: var(--faded);
  font-size: 12px;
}
input {
  width: 100%;
  margin-top: 5px;
  padding: 7px 9px;
  background: #070b10;
  color: var(--ink);
  border: 1px solid var(--wire);
  border-radius: 2px;
  font-family: var(--mono);
  font-size: 13px;
}
input:focus, button:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 2px;
}
button {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--wire);
  border-radius: 2px;
  padding: 5px 10px;
  font-size: 12px;
  line-height: 1.2;
  cursor: pointer;
  font-family: inherit;
}
button:hover { border-color: var(--accent); color: var(--accent); }
button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
  font-weight: 500;
}
button.primary:hover { filter: brightness(1.08); color: var(--bg); }
button.icon {
  border: 0;
  padding: 0 4px;
  font-size: 20px;
  line-height: 1;
  color: var(--faded);
}
.err { color: var(--err); font-size: 13px; }
.hint { color: var(--faded); font-size: 12px; margin: 8px 0; }
.board {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}
.rail, .pane {
  background: var(--cubby);
  border: 1px solid var(--wire);
  min-height: 320px;
}
.rail { padding: 12px; }
.pane { padding: 16px 18px 20px; min-height: 420px; }
.create {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px;
  margin-bottom: 12px;
}
.create input { margin: 0; }
.cubby {
  display: block;
  width: 100%;
  text-align: left;
  padding: 10px 10px 9px;
  margin-bottom: 6px;
  border: 1px solid var(--wire);
  background: transparent;
  color: inherit;
  cursor: pointer;
}
.cubby:hover { border-color: #35506a; }
.cubby.on {
  border-color: var(--accent);
  background: rgba(0, 217, 255, 0.05);
}
.cubby h3 {
  margin: 0 0 4px;
  font-size: 14px;
  font-weight: 500;
}
.cubby .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 8px;
  align-items: center;
  color: var(--faded);
  font-size: 11px;
  font-family: var(--mono);
}
.dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #5e6f7e;
}
.dot.on { background: var(--ok); }
.call.ringing, .call.waiting { color: var(--ring); }
.call.incoming { color: #7eb8ff; }
.call.connected { color: var(--ok); }
.pane-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 12px;
}
.pane-head h2 {
  margin: 0;
  font-size: 16px;
  font-weight: 500;
}
.pane-head code {
  font-family: var(--mono);
  color: var(--accent);
  font-size: 12px;
}
.actions { display: flex; gap: 6px; flex-wrap: wrap; }
.hung { color: var(--ring); font-size: 12px; margin: 0 0 10px; }
.hung:empty { display: none; }
.contacts {
  list-style: none;
  padding: 0;
  margin: 0 0 14px;
  border-top: 1px solid var(--wire);
}
.contacts li {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 8px;
  align-items: center;
  font-family: var(--mono);
  font-size: 12px;
  padding: 7px 0;
  border-bottom: 1px solid var(--wire);
}
.contacts .src { color: var(--faded); }
.contacts .on { color: var(--accent); }
.contact-form {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 6px;
  margin-bottom: 18px;
}
.contact-form input { margin: 0; }
.tape-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 6px;
  color: var(--faded);
  font-size: 12px;
}
.tape {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 520px;
  overflow: auto;
}
.msg {
  display: grid;
  grid-template-columns: 7.2rem minmax(0, 1fr);
  gap: 10px 14px;
  padding: 9px 0;
  border-bottom: 1px dotted var(--wire);
}
.msg time {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--faded);
  padding-top: 2px;
}
.msg .who {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--faded);
  margin-bottom: 3px;
}
.msg.mine .who { color: var(--accent); }
.msg .body {
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 13px;
}
.empty { color: var(--faded); font-size: 13px; margin: 24px 4px; }
dialog:not([open]) { display: none; }
dialog[open] {
  display: flex;
  flex-direction: column;
  background: var(--cubby);
  color: var(--ink);
  border: 1px solid var(--accent);
  border-radius: 2px;
  max-width: 560px;
  width: calc(100% - 32px);
  max-height: 90vh;
  padding: 0;
}
dialog::backdrop { background: rgba(4, 8, 12, 0.72); }
.ticket { display: flex; flex-direction: column; min-height: 0; max-height: 90vh; }
.ticket-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px 0;
}
.ticket-head h2 { margin: 0; font-size: 16px; font-weight: 500; }
.secret-body { overflow: auto; padding: 8px 16px 0; min-height: 0; }
.secret-foot {
  flex-shrink: 0;
  padding: 12px 16px 14px;
  display: flex;
  justify-content: flex-end;
}
.codes { margin: 12px 0; }
.codes div { display: grid; grid-template-columns: 4rem 1fr; gap: 8px; margin: 6px 0; font-size: 13px; }
.codes dt { color: var(--faded); }
code, pre { font-family: var(--mono); color: var(--accent); word-break: break-all; }
pre {
  background: #070b10;
  padding: 8px;
  overflow: auto;
  font-size: 11px;
  margin: 0;
  max-height: 140px;
  border: 1px solid var(--wire);
}
.secret-block { margin-top: 12px; }
.secret-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  color: var(--faded);
  font-size: 12px;
}
@media (max-width: 800px) {
  .mast { grid-template-columns: auto 1fr; }
  .mast-end { grid-column: 1 / -1; justify-content: flex-start; }
  .board { grid-template-columns: 1fr; }
  .contact-form { grid-template-columns: 1fr; }
  .msg { grid-template-columns: 1fr; gap: 4px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}