/* ═══════════════ tokens ═══════════════ */
:root {
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --r: 7.5px;
  --bubble-shadow: 0 1px .5px rgba(11, 20, 26, .13);
  --head-h: 59px;
}

html[data-theme="light"] {
  --app-bg: #d9dbd4;
  --panel: #ffffff;
  --head: #f0f2f5;
  --thread-bg: #efeae2;
  --in: #ffffff;
  --out: #d9fdd3;
  --system: #ffeecd;
  --hover: #f5f6f6;
  --active: #f0f2f5;
  --input: #ffffff;
  --input-alt: #f0f2f5;
  --text: #111b21;
  --text-2: #667781;
  --text-3: #8696a0;
  --line: #e9edef;
  --line-2: #d1d7db;
  --accent: #008069;
  --accent-2: #00a884;
  --chip-bg: #f0f2f5;
  --chip-on-bg: #d9fdd3;
  --chip-on-fg: #017561;
  --mark: #f9dd7e;
  --tick: #53bdeb;
  --doodle: rgba(0, 0, 0, .028);
  --pill: rgba(255, 255, 255, .92);
  --scroll: #cfd4d6;
  --shadow: rgba(11, 20, 26, .16);
}

html[data-theme="dark"] {
  --app-bg: #0b141a;
  --panel: #111b21;
  --head: #202c33;
  --thread-bg: #0b141a;
  --in: #202c33;
  --out: #005c4b;
  --system: #182229;
  --hover: #202c33;
  --active: #2a3942;
  --input: #2a3942;
  --input-alt: #202c33;
  --text: #e9edef;
  --text-2: #8696a0;
  --text-3: #667781;
  --line: #222d34;
  --line-2: #2a3942;
  --accent: #00a884;
  --accent-2: #00a884;
  --chip-bg: #202c33;
  --chip-on-bg: #103529;
  --chip-on-fg: #00a884;
  --mark: #8a6d1f;
  --tick: #53bdeb;
  --doodle: rgba(255, 255, 255, .022);
  --pill: #182229;
  --scroll: #374045;
  --shadow: rgba(0, 0, 0, .4);
}

* { box-sizing: border-box; }
html, body { height: 100%; }

/* class-level `display` must not defeat the hidden attribute */
[hidden] { display: none !important; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 14.2px;
  color: var(--text);
  background: var(--app-bg);
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

button { font-family: inherit; font-size: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
input { font-family: inherit; }

code {
  font-family: var(--mono);
  font-size: .9em;
  background: rgba(127, 127, 127, .16);
  padding: 1px 4px;
  border-radius: 4px;
}

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-thumb { background: var(--scroll); border-radius: 3px; }
::-webkit-scrollbar-track { background: transparent; }

/* ═══════════════ shell ═══════════════ */
.wa {
  height: 100%;
  display: flex;
  position: relative;
  background: var(--panel);
  overflow: hidden;
}

@media (min-width: 1441px) {
  body { padding: 19px 0; }
  .wa { max-width: 1600px; margin: 0 auto; box-shadow: 0 6px 18px var(--shadow); }
}

/* ═══════════════ left pane ═══════════════ */
.pane-left {
  width: 30%;
  min-width: 320px;
  max-width: 460px;
  flex: 0 0 auto;
  background: var(--panel);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.left-head {
  height: var(--head-h);
  flex: 0 0 var(--head-h);
  background: var(--head);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 8px;
}

.avatar {
  width: 40px;
  height: 40px;
  flex: 0 0 40px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 500;
  font-size: 15px;
  letter-spacing: .3px;
  overflow: hidden;
  user-select: none;
}

.av-me { background: #6a7175; color: #cfd4d6; }
html[data-theme="dark"] .av-me { background: #6a7175; }
.av-me svg { color: #dfe5e7; }

.left-head-actions { margin-left: auto; display: flex; align-items: center; gap: 2px; position: relative; }

.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  color: var(--text-2);
  display: grid;
  place-items: center;
  flex: 0 0 40px;
  transition: background .12s;
}

.icon-btn:hover { background: rgba(134, 150, 160, .16); color: var(--text); }
.icon-btn.on { color: var(--accent); }

.menu {
  position: absolute;
  top: 44px;
  right: 0;
  z-index: 40;
  min-width: 200px;
  background: var(--panel);
  border-radius: 3px;
  box-shadow: 0 2px 10px var(--shadow);
  padding: 6px 0;
  display: flex;
  flex-direction: column;
}

.menu.right { right: 0; }

.menu button {
  text-align: left;
  padding: 11px 24px;
  font-size: 14.2px;
  color: var(--text);
}

.menu button:hover { background: var(--hover); }

/* search field */
.left-search { padding: 7px 12px; background: var(--panel); border-bottom: 1px solid var(--line); }

.search-field {
  display: flex;
  align-items: center;
  background: var(--input-alt);
  border-radius: 8px;
  height: 35px;
  padding: 0 12px;
  gap: 12px;
  color: var(--text-3);
}

.search-field:focus-within { background: var(--input); box-shadow: 0 0 0 1px var(--line-2) inset; }
.sf-icon { line-height: 0; flex: 0 0 auto; }

.search-field input {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
  font-size: 14px;
}

.search-field input::placeholder { color: var(--text-3); }
.sf-clear { color: var(--text-3); line-height: 0; padding: 0; }
.sf-clear:hover { color: var(--text); }

/* chips */
.chips { display: flex; gap: 8px; padding: 8px 12px; border-bottom: 1px solid var(--line); }

.chip {
  background: var(--chip-bg);
  color: var(--text-2);
  border-radius: 16px;
  padding: 5px 13px;
  font-size: 13.5px;
  line-height: 1.4;
}

.chip:hover { filter: brightness(.97); }
.chip.on { background: var(--chip-on-bg); color: var(--chip-on-fg); }

/* chat list */
.list-scroll { flex: 1; overflow-y: auto; min-height: 0; }

.chat-item {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 0 12px 0 13px;
  height: 72px;
  cursor: pointer;
  position: relative;
  width: 100%;
  text-align: left;
}

.chat-item::after {
  content: "";
  position: absolute;
  left: 68px;
  right: 0;
  bottom: 0;
  border-bottom: 1px solid var(--line);
}

.chat-item:last-child::after { border-bottom: 0; }
.chat-item:hover { background: var(--hover); }
.chat-item.on { background: var(--active); }

.ci-body { flex: 1; min-width: 0; }

.ci-row1 { display: flex; align-items: baseline; gap: 8px; }
.ci-name { font-size: 16.4px; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; flex: 1; }
.ci-time { font-size: 12px; color: var(--text-3); flex: 0 0 auto; }

.ci-row2 { display: flex; align-items: center; gap: 6px; margin-top: 2px; }

.ci-msg {
  flex: 1;
  min-width: 0;
  font-size: 14px;
  color: var(--text-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ci-msg mark { background: var(--mark); color: inherit; border-radius: 2px; }
.ci-count {
  flex: 0 0 auto;
  font-size: 11.5px;
  color: var(--text-3);
  background: var(--chip-bg);
  border-radius: 10px;
  padding: 1px 7px;
}

.ci-star { color: var(--text-3); line-height: 0; flex: 0 0 auto; }

.list-empty { padding: 40px 24px; text-align: center; color: var(--text-3); font-size: 13.5px; }
.list-empty p { margin: 0 0 6px; }
.text-btn { color: var(--accent); text-decoration: underline; font-size: 13.5px; }

/* message search results in left pane */
.msg-results { padding-bottom: 10px; }

.res-head {
  padding: 14px 16px 8px;
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--text-3);
  border-top: 1px solid var(--line);
}

.res-item {
  display: block;
  width: 100%;
  text-align: left;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
}

.res-item:hover { background: var(--hover); }
.res-top { display: flex; gap: 8px; align-items: baseline; }
.res-chat { font-size: 14.5px; color: var(--text); flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.res-time { font-size: 11.5px; color: var(--text-3); flex: 0 0 auto; }
.res-text {
  margin-top: 2px;
  font-size: 13.5px;
  color: var(--text-2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.res-text mark { background: var(--mark); color: inherit; border-radius: 2px; }
.res-none { padding: 24px 16px; color: var(--text-3); font-size: 13.5px; text-align: center; }

/* ═══════════════ right pane ═══════════════ */
.pane-right { flex: 1; min-width: 0; display: flex; position: relative; }

/* intro */
.intro {
  flex: 1;
  display: grid;
  place-items: center;
  background: var(--head);
  border-bottom: 6px solid var(--accent-2);
  padding: 24px;
  overflow-y: auto;
}

.intro-inner { max-width: 560px; text-align: center; }
.intro-art { color: var(--text-3); line-height: 0; margin-bottom: 22px; }
.intro h1 { margin: 0 0 12px; font-size: 30px; font-weight: 300; color: var(--text); letter-spacing: -.3px; }
.intro-sub { margin: 0 0 26px; font-size: 14px; color: var(--text-2); line-height: 1.6; }

.dropzone {
  border: 2px dashed var(--line-2);
  border-radius: 12px;
  padding: 30px 20px;
  color: var(--text-2);
  background: var(--panel);
  outline: 0;
  transition: border-color .15s, background .15s;
}

.dropzone:hover, .dropzone:focus-visible { border-color: var(--accent-2); }
.dz-icon { color: var(--accent-2); }
.dz-title { margin: 8px 0 3px; font-size: 15px; color: var(--text); }
.dz-or { margin: 0; font-size: 13px; }
.link { color: var(--accent); text-decoration: underline; }

.how { margin-top: 24px; text-align: left; font-size: 13px; color: var(--text-2); }
.how summary { cursor: pointer; color: var(--accent); }
.how ol { margin: 8px 0 0; padding-left: 20px; line-height: 1.75; }

.intro-lock {
  margin: 26px 0 0;
  font-size: 13px;
  color: var(--text-3);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

/* conversation */
.conv { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.conv[hidden] { display: none; }

.conv-head {
  height: var(--head-h);
  flex: 0 0 var(--head-h);
  background: var(--head);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 10px;
  z-index: 8;
  border-left: 1px solid var(--line);
}

.conv-id { display: flex; align-items: center; gap: 15px; flex: 1; min-width: 0; text-align: left; padding: 0; }
.conv-meta { min-width: 0; display: flex; flex-direction: column; }
.conv-name { font-size: 16px; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.conv-sub { font-size: 13px; color: var(--text-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.conv-actions { display: flex; align-items: center; gap: 2px; position: relative; margin-left: auto; }

/* thread */
.thread-wrap { flex: 1; position: relative; min-height: 0; display: flex; }

.scroller {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  background-color: var(--thread-bg);
  background-image:
    radial-gradient(var(--doodle) 1.1px, transparent 1.1px),
    radial-gradient(var(--doodle) 1.1px, transparent 1.1px);
  background-size: 30px 30px, 30px 30px;
  background-position: 0 0, 15px 15px;
  padding: 12px 6% 8px;
}

.thread { max-width: 980px; margin: 0 auto; display: flex; flex-direction: column; }

.day-sep { align-self: center; margin: 12px 0 8px; }

.day-sep span,
.float-date {
  background: var(--pill);
  color: var(--text-2);
  font-size: 12.2px;
  font-weight: 500;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 7.5px;
  box-shadow: var(--bubble-shadow);
  display: inline-block;
}

.float-date {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 6;
  pointer-events: none;
  opacity: 0;
  transition: opacity .18s;
  box-shadow: 0 1px 3px var(--shadow);
}

.float-date.show { opacity: 1; }

.sys {
  align-self: center;
  max-width: 82%;
  background: var(--system);
  color: var(--text-2);
  font-size: 12.5px;
  line-height: 1.45;
  text-align: center;
  padding: 6px 12px;
  border-radius: 7.5px;
  box-shadow: var(--bubble-shadow);
  margin: 4px 0;
}

.sys .lock { vertical-align: -1px; margin-right: 3px; }

.row { display: flex; margin-top: 2px; }
.row.out { justify-content: flex-end; }
.row.first { margin-top: 12px; }

.bubble {
  position: relative;
  max-width: min(75%, 620px);
  background: var(--in);
  border-radius: var(--r);
  box-shadow: var(--bubble-shadow);
  padding: 6px 7px 6px 9px;
  line-height: 19px;
  word-wrap: break-word;
  overflow-wrap: anywhere;
}

.row.out .bubble { background: var(--out); padding: 6px 9px 6px 7px; }
.row.first.in .bubble { border-top-left-radius: 0; }
.row.first.out .bubble { border-top-right-radius: 0; }

.row.first .bubble::before {
  content: "";
  position: absolute;
  top: 0;
  width: 8px;
  height: 13px;
  background: inherit;
}

.row.first.in .bubble::before { left: -8px; clip-path: polygon(100% 0, 0 0, 100% 100%); }
.row.first.out .bubble::before { right: -8px; clip-path: polygon(0 0, 100% 0, 0 100%); }

.who { font-size: 12.8px; font-weight: 500; display: block; margin-bottom: 1px; }

.txt { white-space: pre-wrap; font-size: 14.2px; }
.txt a { color: var(--accent); text-decoration: underline; word-break: break-all; }
html[data-theme="dark"] .txt a { color: #53bdeb; }
.txt.jumbo { font-size: 32px; line-height: 1.28; }
.txt strong { font-weight: 600; }
.txt code { font-size: 13px; }

.meta {
  float: right;
  margin: 6px -2px -5px 8px;
  font-size: 11px;
  line-height: 15px;
  color: var(--text-3);
  display: inline-flex;
  align-items: center;
  gap: 3px;
  white-space: nowrap;
  user-select: none;
}

.meta .edited { font-size: 11px; }
.meta .tick { color: var(--tick); line-height: 0; }
html[data-theme="light"] .row.out .meta { color: rgba(17, 27, 33, .5); }
html[data-theme="dark"] .row.out .meta { color: rgba(233, 237, 239, .6); }

.omitted {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-2);
  font-size: 13.6px;
  font-style: italic;
}

.omitted svg { flex: 0 0 auto; opacity: .8; }
.deleted { display: inline-flex; align-items: center; gap: 6px; color: var(--text-3); font-style: italic; }
.blank { color: var(--text-3); font-style: italic; font-size: 13px; }
.attach {
  display: inline-block;
  width: 100%;
  font-size: 13.2px;
  color: var(--text-2);
  margin-top: 1px;
  white-space: pre-wrap;
  word-break: break-word;
}

.txt mark, .who mark { background: var(--mark); color: inherit; border-radius: 2px; }
.bubble.flash { animation: flash 1.5s ease-out; }

@keyframes flash {
  0%, 25% { box-shadow: 0 0 0 3px var(--accent-2); }
  100% { box-shadow: var(--bubble-shadow); }
}

.render-note { align-self: center; color: var(--text-2); font-size: 12.5px; padding: 14px; }

.round-btn {
  position: absolute;
  right: 20px;
  bottom: 16px;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--panel);
  color: var(--text-2);
  box-shadow: 0 1px 3px var(--shadow);
  display: grid;
  place-items: center;
  z-index: 6;
}

.round-btn:hover { color: var(--text); }

/* composer */
.composer {
  flex: 0 0 62px;
  background: var(--head);
  border-left: 1px solid var(--line);
  display: flex;
  align-items: center;
  padding: 0 16px;
}

.composer-box {
  flex: 1;
  background: var(--input);
  border-radius: 8px;
  height: 42px;
  display: flex;
  align-items: center;
  padding: 0 14px;
}

.composer-text { color: var(--text-3); font-size: 14px; }

/* ═══════════════ drawer ═══════════════ */
.drawer {
  width: 30%;
  min-width: 320px;
  max-width: 440px;
  flex: 0 0 auto;
  background: var(--panel);
  border-left: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.drawer[hidden] { display: none; }

.drawer-head {
  height: var(--head-h);
  flex: 0 0 var(--head-h);
  background: var(--head);
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 0 12px;
  font-size: 16px;
}

.drawer-body { flex: 1; overflow-y: auto; min-height: 0; }
.drawer-search-field { padding: 10px 12px; }
.drawer-hint { padding: 30px 20px; text-align: center; color: var(--text-3); font-size: 13.5px; }
.drawer-results { display: flex; flex-direction: column; }

.dres {
  text-align: left;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  width: 100%;
}

.dres:hover { background: var(--hover); }
.dres.on { background: var(--active); }
.dres-top { display: flex; gap: 8px; align-items: baseline; margin-bottom: 2px; }
.dres-who { font-size: 12.5px; color: var(--text-2); flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dres-time { font-size: 11.5px; color: var(--text-3); }
.dres-text {
  font-size: 13.6px;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.dres-text mark { background: var(--mark); color: inherit; border-radius: 2px; }

.info-top { padding: 28px 20px 24px; text-align: center; border-bottom: 1px solid var(--line); }
.avatar.big { width: 128px; height: 128px; flex-basis: 128px; font-size: 44px; margin: 0 auto 14px; font-weight: 400; }
.info-top h2 { margin: 0 0 4px; font-size: 20px; font-weight: 400; }
.info-top p { margin: 0; font-size: 14px; color: var(--text-2); }

.info-block { padding: 16px 20px; border-bottom: 1px solid var(--line); }
.info-block h4 { margin: 0 0 10px; font-size: 12.5px; text-transform: uppercase; letter-spacing: .5px; color: var(--accent); font-weight: 600; }
.info-note { margin: -4px 0 10px; font-size: 12.5px; color: var(--text-3); line-height: 1.5; }
.info-block.danger { border-bottom: 0; }

.me-list, .filter-list { display: flex; flex-direction: column; gap: 3px; }

.me-item, .filter-row {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 8px 8px;
  border-radius: 6px;
  font-size: 14px;
  width: 100%;
  text-align: left;
}

.me-item:hover, .filter-row:hover { background: var(--hover); }
.me-item.on { background: var(--hover); box-shadow: inset 2px 0 0 var(--accent); }

.dot {
  width: 30px;
  height: 30px;
  flex: 0 0 30px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 12px;
  font-weight: 500;
}

.nm { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; }
.count { font-size: 12px; color: var(--text-3); flex: 0 0 auto; }

.you-tag {
  font-size: 11px;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border-radius: 10px;
  padding: 2px 8px;
  flex: 0 0 auto;
}

.filter-row { cursor: pointer; }
.filter-row input { accent-color: var(--accent); width: 16px; height: 16px; cursor: pointer; flex: 0 0 16px; }
.filter-row .swatch { width: 9px; height: 9px; border-radius: 50%; flex: 0 0 9px; }

.stats { margin: 0; display: grid; grid-template-columns: 1fr auto; gap: 8px 12px; font-size: 13.5px; }
.stats dt { color: var(--text-2); }
.stats dd { margin: 0; text-align: right; font-variant-numeric: tabular-nums; }

.row-btn {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  padding: 10px 4px;
  font-size: 15px;
  text-align: left;
  border-radius: 6px;
}

.row-btn:hover { background: var(--hover); }
.row-btn.danger { color: #ea0038; }
html[data-theme="dark"] .row-btn.danger { color: #f15c6d; }

/* ═══════════════ overlays ═══════════════ */
.drag-overlay {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: rgba(0, 128, 105, .85);
  display: grid;
  place-items: center;
  backdrop-filter: blur(2px);
}

.drag-inner {
  border: 3px dashed rgba(255, 255, 255, .8);
  border-radius: 14px;
  padding: 42px 62px;
  color: #fff;
  text-align: center;
}

.drag-inner p { margin: 12px 0 0; font-size: 19px; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  z-index: 95;
  background: #2a3942;
  color: #e9edef;
  font-size: 13.5px;
  padding: 11px 18px;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, .35);
  max-width: 88vw;
  text-align: center;
}

.only-narrow { display: none; }

/* ═══════════════ responsive ═══════════════ */
@media (max-width: 1200px) {
  .drawer { min-width: 300px; }
  .pane-left { min-width: 300px; }
}

@media (max-width: 980px) {
  .drawer {
    position: absolute;
    top: 0;
    bottom: 0;
    right: 0;
    width: min(420px, 100%);
    max-width: none;
    z-index: 30;
    box-shadow: -4px 0 20px var(--shadow);
  }
}

@media (max-width: 800px) {
  .pane-left { width: 100%; max-width: none; min-width: 0; }
  .pane-right { display: none; }
  .wa.open .pane-left { display: none; }
  .wa.open .pane-right { display: flex; }
  .only-narrow { display: grid; }
  .conv-head, .composer { border-left: 0; }
  .scroller { padding: 10px 8px 6px; }
  .bubble { max-width: 85%; }
  .drawer { position: fixed; inset: 0; width: 100%; }
}