:root {
  --bg: #0d0f14;
  --bg-rail: #090b0f;
  --panel: #14171e;
  --panel-2: #1a1e27;
  --panel-3: #212633;
  --line: #262b38;
  --line-soft: #1d222c;

  --text: #e7e9f0;
  --text-2: #969db0;
  --text-3: #666e82;

  --accent: #5b6cff;
  --accent-soft: #2a2f56;
  --good: #3ecf8e;
  --danger: #f2555a;
  --warn: #e8b23a;

  --radius: 10px;
  --radius-lg: 16px;
  --rail-w: 64px;
  --side-w: 264px;
  --member-w: 232px;

  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font: 400 14px/1.55 "Inter", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  overflow: hidden;
}

.sprite { display: none; }

svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: none;
}

button { font: inherit; color: inherit; cursor: pointer; }

/* ---------------------------------------------------------------- layout */

.app {
  display: grid;
  grid-template-columns: var(--rail-w) var(--side-w) minmax(0, 1fr) 0;
  height: 100vh;
  height: 100dvh;
  transition: grid-template-columns .18s ease;
}

.app.with-members { grid-template-columns: var(--rail-w) var(--side-w) minmax(0, 1fr) var(--member-w); }

.app[hidden] { display: none; }

/* ------------------------------------------------------------- server rail */

.rail {
  background: var(--bg-rail);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 14px 0;
  border-right: 1px solid var(--line-soft);
}

.rail-logo {
  width: 42px;
  height: 42px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: .5px;
  color: #fff;
  background: linear-gradient(145deg, #6d7cff, #4a56d8);
  box-shadow: 0 6px 18px rgba(91, 108, 255, .28);
}

.rail-sep { width: 26px; height: 1px; background: var(--line); }

.rail-server,
.rail-btn {
  width: 42px;
  height: 42px;
  border-radius: 13px;
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text-2);
  display: grid;
  place-items: center;
  transition: .15s;
}

.rail-server:hover,
.rail-btn:hover { color: var(--text); background: var(--panel-3); border-color: #333a4c; }

.rail-server.is-active {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(145deg, #6d7cff, #4a56d8);
}

.rail-spacer { flex: 1; }

/* ---------------------------------------------------------------- sidebar */

.sidebar {
  background: var(--panel);
  border-right: 1px solid var(--line-soft);
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.sidebar-head {
  padding: 14px 16px 12px;
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(91,108,255,.07), transparent);
}

.server-title {
  font-weight: 600;
  font-size: 15px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.server-sub {
  font-size: 12px;
  color: var(--text-3);
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.server-meta { display: flex; gap: 6px; margin-top: 9px; }

.pill {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: #b9c2ff;
  border: 1px solid rgba(91,108,255,.28);
}

.pill.ghost { background: transparent; color: var(--text-3); border-color: var(--line); }
.pill.on { background: rgba(62,207,142,.14); color: var(--good); border-color: rgba(62,207,142,.3); }

.tree-wrap { flex: 1; overflow-y: auto; padding: 10px 8px 4px; }

.tree-label,
.members > .tree-label {
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-3);
  padding: 6px 10px;
  font-weight: 500;
}

.tree { display: flex; flex-direction: column; gap: 1px; }

.channel {
  border-radius: 7px;
  overflow: hidden;
}

.channel-row {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 7px 9px;
  border-radius: 7px;
  color: var(--text-2);
  cursor: pointer;
  user-select: none;
  transition: background .12s, color .12s;
}

.channel-row:hover { background: var(--panel-2); color: var(--text); }
.channel.is-current > .channel-row { background: var(--panel-3); color: #fff; }

.channel-row .caret {
  width: 14px;
  height: 14px;
  transition: transform .15s;
  color: var(--text-3);
}

.channel.is-collapsed .caret { transform: rotate(-90deg); }
.channel.is-empty > .channel-row .caret { opacity: 0; }

.channel-name {
  flex: 1;
  min-width: 0;
  font-size: 13.5px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.channel-count { font-size: 11px; color: var(--text-3); }

.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  flex: none;
  box-shadow: 0 0 0 3px rgba(91,108,255,.16);
}

.channel-kids { padding-left: 12px; }
.channel.is-collapsed > .channel-kids { display: none; }

/* ------------------------------------------------------------------- user */

.user {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 5px 8px;
  margin-left: 16px;
  border-radius: 7px;
  cursor: pointer;
  transition: background .12s;
}

.user:hover { background: var(--panel-2); }
.user.is-self .user-name { color: #cfd6ff; }

.user .avatar { width: 22px; height: 22px; font-size: 10px; border-radius: 8px; }

.user-name {
  flex: 1;
  min-width: 0;
  font-size: 13px;
  color: var(--text-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user.is-talking .avatar { box-shadow: 0 0 0 2px var(--good); }
.user.is-talking .user-name { color: #fff; }

.avatar {
  width: 30px;
  height: 30px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 600;
  color: #fff;
  flex: none;
}

.badge-mini { width: 13px; height: 13px; color: var(--text-3); }
.badge-mini.red { color: var(--danger); }

/* ---------------------------------------------------------------- selfcard */

.selfcard {
  border-top: 1px solid var(--line-soft);
  background: var(--panel-2);
  padding: 10px 12px 12px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.self-level {
  height: 2px;
  width: 100%;
  background: var(--line);
  border-radius: 2px;
  overflow: hidden;
}

.self-level i {
  display: block;
  height: 100%;
  width: 0;
  background: var(--good);
  transition: width .08s linear;
}

.self-info { display: flex; align-items: center; gap: 9px; flex: 1; min-width: 0; }
.self-name { display: flex; flex-direction: column; min-width: 0; }
.self-name span { font-size: 13.5px; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.self-name small { font-size: 11px; color: var(--text-3); }

.self-actions { display: flex; gap: 4px; }

.icon-btn {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-2);
  display: grid;
  place-items: center;
  transition: .14s;
}

.icon-btn:hover { background: var(--panel-3); color: var(--text); }
.icon-btn.is-off { color: var(--danger); background: rgba(242,85,90,.1); }
.icon-btn.is-on { color: var(--good); background: rgba(62,207,142,.12); }

/* ------------------------------------------------------------------- main */

.main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--bg);
}

.main-head {
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  border-bottom: 1px solid var(--line-soft);
  gap: 12px;
}

.main-title { display: flex; align-items: baseline; gap: 8px; min-width: 0; }
.main-title .hash { color: var(--text-3); font-size: 18px; }
.main-title > span:nth-child(2) { font-weight: 600; font-size: 15px; white-space: nowrap; }
.main-topic {
  font-size: 12.5px;
  color: var(--text-3);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  border-left: 1px solid var(--line);
  padding-left: 10px;
  margin-left: 2px;
}

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 18px 16px 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  scroll-behavior: smooth;
}

.msg-empty {
  margin: auto;
  color: var(--text-3);
  font-size: 13px;
  text-align: center;
}

.msg {
  display: flex;
  gap: 10px;
  padding: 5px 8px;
  border-radius: 8px;
}

.msg:hover { background: rgba(255,255,255,.018); }

.msg-body { min-width: 0; flex: 1; }
.msg-head { display: flex; align-items: baseline; gap: 8px; }
.msg-author { font-size: 13.5px; font-weight: 600; color: #cdd4ff; }
.msg-time { font-size: 11px; color: var(--text-3); }
.msg-kind {
  font-size: 10px;
  color: var(--text-3);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 6px;
}
.msg-text { font-size: 13.5px; color: var(--text); word-break: break-word; white-space: pre-wrap; }
.msg.is-system .msg-text { color: var(--text-3); font-size: 12.5px; }
.msg.is-system .avatar { display: none; }

/* Our own message, waiting for the server to acknowledge it. */
.msg.is-pending { opacity: .55; }
.msg.is-failed .msg-text { color: #ffb3b5; }
.msg-kind.is-bad { color: #ffb3b5; border-color: rgba(242, 85, 90, .45); }

.composer {
  display: flex;
  gap: 8px;
  padding: 12px 16px 16px;
}

.composer input {
  flex: 1;
  height: 42px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  padding: 0 14px;
  font-size: 14px;
  outline: none;
  transition: border-color .15s;
}

.composer input:focus { border-color: #3b4470; }
.composer input:disabled { opacity: .5; }

.send-btn {
  width: 42px;
  height: 42px;
  border-radius: var(--radius);
  border: none;
  background: var(--accent);
  color: #fff;
  display: grid;
  place-items: center;
  transition: .15s;
}

.send-btn:hover { background: #6b7aff; }
.send-btn:disabled { background: var(--panel-3); color: var(--text-3); cursor: not-allowed; }

/* ---------------------------------------------------------------- members */

.members {
  background: var(--panel);
  border-left: 1px solid var(--line-soft);
  overflow: hidden;
  display: none;
  flex-direction: column;
}

.app.with-members .members { display: flex; }
.member-list { overflow-y: auto; padding: 0 10px 12px; }

/* ---------------------------------------------------------------- overlay */

.overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  background: radial-gradient(1200px 600px at 50% -10%, #1b2140 0%, #0d0f14 60%);
  z-index: 50;
}

.overlay[hidden] { display: none; }

.connect-card {
  width: min(520px, 100%);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 26px;
  box-shadow: 0 24px 70px rgba(0,0,0,.55);
}

.connect-brand { display: flex; gap: 14px; align-items: center; margin-bottom: 22px; }
.brand-mark {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(145deg, #6d7cff, #4a56d8);
}
.connect-brand h1 { margin: 0; font-size: 17px; font-weight: 600; }
.connect-brand p { margin: 3px 0 0; font-size: 12.5px; color: var(--text-3); }

.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; flex: 1; min-width: 0; }
.field > span { font-size: 12px; color: var(--text-2); display: flex; gap: 6px; align-items: baseline; }
.field > span small { color: var(--text-3); font-size: 11px; }
.field input,
.field select {
  height: 40px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  padding: 0 12px;
  font-size: 14px;
  outline: none;
}
.field input:focus, .field select:focus { border-color: #3b4470; }
.field input[type="range"] { padding: 0; height: 26px; accent-color: var(--accent); }
.field-row { display: flex; gap: 12px; }

.primary {
  width: 100%;
  height: 44px;
  border: none;
  border-radius: var(--radius);
  background: var(--accent);
  color: #fff;
  font-size: 14.5px;
  font-weight: 500;
  margin-top: 6px;
  transition: .15s;
}

.primary:hover { background: #6b7aff; }
.primary:disabled { background: var(--panel-3); color: var(--text-3); cursor: progress; }

.connect-error {
  background: rgba(242,85,90,.1);
  border: 1px solid rgba(242,85,90,.3);
  color: #ffb3b5;
  font-size: 12.5px;
  padding: 9px 12px;
  border-radius: var(--radius);
  margin-bottom: 12px;
}

.connect-foot { margin-top: 16px; }
.recent { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; }

.recent button {
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text-2);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 12px;
}

.recent button:hover { color: var(--text); border-color: #3b4470; }
.hint { font-size: 11.5px; color: var(--text-3); margin: 0; line-height: 1.7; }

/* --------------------------------------------------------------- settings */

.settings {
  position: fixed;
  inset: 0;
  background: rgba(6,8,12,.66);
  display: grid;
  place-items: center;
  padding: 24px;
  z-index: 60;
}

.settings[hidden] { display: none; }

.settings-card {
  width: min(440px, 100%);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.settings-card header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line-soft);
}

.settings-card h2 { margin: 0; font-size: 15px; font-weight: 600; }
.settings-body { padding: 16px; }

.meter {
  height: 6px;
  background: var(--line);
  border-radius: 4px;
  overflow: hidden;
  margin: 6px 0 12px;
}

.meter i { display: block; height: 100%; width: 0; background: var(--good); transition: width .08s linear; }

/* ----------------------------------------------------------------- toasts */

.toasts {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 80;
  pointer-events: none;
}

.toast {
  background: var(--panel-3);
  border: 1px solid var(--line);
  color: var(--text);
  padding: 9px 16px;
  border-radius: 999px;
  font-size: 12.5px;
  box-shadow: 0 10px 30px rgba(0,0,0,.45);
}

.toast.is-error { border-color: rgba(242,85,90,.45); color: #ffc0c2; }

/* ------------------------------------------------------------ responsive */

@media (max-width: 860px) {
  .app, .app.with-members {
    grid-template-columns: var(--rail-w) minmax(0, 1fr);
  }
  .sidebar { position: fixed; z-index: 40; top: 0; bottom: 0; left: var(--rail-w); width: var(--side-w); transform: translateX(-105%); transition: transform .2s; }
  .app.side-open .sidebar { transform: none; }
  .members { position: fixed; z-index: 41; top: 0; right: 0; bottom: 0; width: min(280px, 82vw); }
  .app.with-members .main { display: none; }
  .main-topic { display: none; }
}

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: #262b38; border-radius: 6px; border: 2px solid transparent; background-clip: content-box; }
::-webkit-scrollbar-thumb:hover { background: #333a4c; background-clip: content-box; }
::-webkit-scrollbar-track { background: transparent; }