/* چت دوستانه — RTL, mobile first */
:root {
  --bg: #0e1116;
  --bg-2: #151a22;
  --bg-3: #1c232e;
  --line: #252d3a;
  --fg: #e8edf5;
  --fg-dim: #97a3b6;
  --accent: #4f8cff;
  --accent-2: #2f6bff;
  --mine: #24406e;
  --peer: #1d242f;
  --ok: #3ddc97;
  --danger: #ff6b6b;
  --radius: 16px;
  --shadow: 0 8px 24px rgba(0, 0, 0, .35);
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f4f6fb; --bg-2: #fff; --bg-3: #eef1f7; --line: #dfe4ee;
    --fg: #14181f; --fg-dim: #5f6b7d; --mine: #d8e6ff; --peer: #fff;
    --shadow: 0 8px 24px rgba(20, 30, 60, .12);
    color-scheme: light;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg); color: var(--fg);
  font: 15px/1.7 "Vazirmatn", "Segoe UI", Tahoma, "Noto Naskh Arabic", sans-serif;
  -webkit-text-size-adjust: 100%; overscroll-behavior: none;
}
button, input, textarea { font: inherit; color: inherit; }
.hidden { display: none !important; }
ul { list-style: none; margin: 0; padding: 0; }
svg { width: 22px; height: 22px; fill: currentColor; }
.spacer { flex: 1; }

/* ---------------- auth ---------------- */
.auth { min-height: 100%; display: grid; place-items: center; padding: 20px; }
.auth-card {
  width: min(420px, 100%); background: var(--bg-2); border: 1px solid var(--line);
  border-radius: 22px; padding: 22px; box-shadow: var(--shadow);
}
.brand { text-align: center; margin-bottom: 14px; }
.brand h1 { margin: 10px 0 2px; font-size: 21px; }
.brand p { margin: 0; color: var(--fg-dim); font-size: 13px; }
.brand-mark {
  inline-size: 46px; block-size: 46px; margin-inline: auto; border-radius: 14px;
  display: grid; place-items: center; font-weight: 700; font-size: 22px; color: #fff;
  background: linear-gradient(135deg, var(--accent), #7b5cff);
}
.brand-mark.big { inline-size: 76px; block-size: 76px; font-size: 36px; border-radius: 22px; }
.tabs { display: flex; gap: 6px; background: var(--bg-3); padding: 4px; border-radius: 12px; margin-bottom: 16px; }
.tab { flex: 1; padding: 9px; border: 0; border-radius: 9px; background: transparent; color: var(--fg-dim); cursor: pointer; }
.tab.active { background: var(--bg-2); color: var(--fg); font-weight: 600; }
.field { display: block; margin-bottom: 12px; }
.field > span { display: block; font-size: 12.5px; color: var(--fg-dim); margin-bottom: 5px; }
.field input, .field textarea, .field select {
  inline-size: 100%; padding: 12px 14px; background: var(--bg-3);
  border: 1px solid var(--line); border-radius: 12px; outline: none;
}
.field input:focus { border-color: var(--accent); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 16px; border-radius: 12px; border: 1px solid var(--line);
  background: var(--bg-3); color: var(--fg); cursor: pointer; text-decoration: none;
}
.btn.block { inline-size: 100%; }
.btn.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); border-color: transparent; color: #fff; font-weight: 600; }
.btn.ghost { background: transparent; }
.btn.danger { color: var(--danger); border-color: #4a2630; }
.btn:disabled { opacity: .5; pointer-events: none; }
.auth-hint { min-height: 20px; font-size: 13px; color: var(--danger); margin: 10px 0 0; text-align: center; }
.auth-hint.ok { color: var(--ok); }

/* ---------------- shell ---------------- */
.app { display: grid; grid-template-columns: 330px 1fr; block-size: 100dvh; overflow: hidden; }
.sidebar { background: var(--bg-2); border-inline-end: 1px solid var(--line); display: flex; flex-direction: column; min-block-size: 0; }
.side-head { display: flex; align-items: center; gap: 8px; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.me { display: flex; align-items: center; gap: 10px; min-inline-size: 0; }
.me-text { display: flex; flex-direction: column; line-height: 1.25; min-inline-size: 0; }
.me-text strong { font-size: 14.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.me-text small { color: var(--fg-dim); font-size: 12px; }
.side-actions { margin-inline-start: auto; display: flex; gap: 2px; }
.icon-btn {
  inline-size: 40px; block-size: 40px; border: 0; border-radius: 12px; background: transparent;
  color: var(--fg-dim); cursor: pointer; display: grid; place-items: center; flex: none;
}
.icon-btn:hover { background: var(--bg-3); color: var(--fg); }
.icon-btn.on { color: var(--ok); }
.icon-btn.round { background: var(--bg-3); color: var(--fg); }
.seg { display: flex; gap: 4px; padding: 10px 12px 6px; }
.seg-btn { flex: 1; padding: 8px; border: 0; border-radius: 10px; background: transparent; color: var(--fg-dim); cursor: pointer; font-size: 14px; }
.seg-btn.active { background: var(--bg-3); color: var(--fg); font-weight: 600; }
.pane { flex: 1; overflow-y: auto; padding: 4px 8px 8px; min-block-size: 0; }
.chat-list li { display: flex; align-items: center; gap: 10px; padding: 10px; border-radius: 14px; cursor: pointer; }
.chat-list li:hover { background: var(--bg-3); }
.chat-list li.active { background: var(--bg-3); }
.chat-main { flex: 1; min-inline-size: 0; }
.chat-top { display: flex; align-items: baseline; gap: 6px; }
.chat-top strong { font-size: 14.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chat-top time { margin-inline-start: auto; color: var(--fg-dim); font-size: 11.5px; white-space: nowrap; }
.chat-bottom { display: flex; align-items: center; gap: 6px; color: var(--fg-dim); font-size: 13px; }
.chat-bottom span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; }
.badge {
  background: var(--accent); color: #fff; border-radius: 999px; font-size: 11.5px;
  min-inline-size: 20px; block-size: 20px; display: grid; place-items: center; padding: 0 5px; font-weight: 700;
}
.side-foot { padding: 10px 12px; border-top: 1px solid var(--line); display: grid; gap: 8px; }
.side-foot svg { inline-size: 18px; block-size: 18px; }
.empty { color: var(--fg-dim); font-size: 13.5px; text-align: center; padding: 26px 16px; }

/* ---------------- thread ---------------- */
.main { position: relative; display: flex; flex-direction: column; min-inline-size: 0; min-block-size: 0; overflow: hidden; background: var(--bg); }
.placeholder { flex: 1; display: grid; place-items: center; color: var(--fg-dim); }
.placeholder-inner { text-align: center; display: grid; gap: 14px; justify-items: center; }
.thread { display: flex; flex-direction: column; flex: 1; min-block-size: 0; }
.thread-head {
  display: flex; align-items: center; gap: 10px; padding: 9px 12px;
  background: var(--bg-2); border-bottom: 1px solid var(--line); z-index: 2;
}
.back { display: none; }
.back svg { transform: scaleX(-1); }
.t-info { flex: 1; min-inline-size: 0; border: 0; background: transparent; text-align: start; cursor: pointer; display: flex; flex-direction: column; line-height: 1.25; }
.t-info strong { font-size: 15.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.t-info small { color: var(--fg-dim); font-size: 12.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.t-info small.live { color: var(--accent); }
.dot { inline-size: 9px; block-size: 9px; border-radius: 50%; background: var(--fg-dim); flex: none; }
.dot.on { background: var(--ok); }

.scroller {
  flex: 1; overflow-y: auto; padding: 14px 12px 4px; min-block-size: 0;
  overscroll-behavior: contain; scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}
.scroller::-webkit-scrollbar { inline-size: 10px; }
.scroller::-webkit-scrollbar-track { background: transparent; }
.scroller::-webkit-scrollbar-thumb { background: var(--line); border-radius: 999px; border: 2px solid transparent; background-clip: content-box; }
.scroller::-webkit-scrollbar-thumb:hover { background: var(--fg-dim); background-clip: content-box; }
.pane::-webkit-scrollbar { inline-size: 8px; }
.pane::-webkit-scrollbar-thumb { background: var(--line); border-radius: 999px; }
.msgs { display: flex; flex-direction: column; gap: 3px; }
.day { align-self: center; color: var(--fg-dim); font-size: 11.5px; background: var(--bg-2); border: 1px solid var(--line); padding: 2px 10px; border-radius: 999px; margin: 10px auto 6px; }
.older { cursor: pointer; color: var(--accent); }
.audio-line { display: flex; justify-content: space-between; gap: 8px; }
.map-controls {
  position: absolute; inset-block-start: 8px; inset-inline-end: 8px;
  display: grid; gap: 6px; z-index: 2;
}
.msg { display: flex; flex-direction: column; max-inline-size: min(78%, 520px); gap: 2px; }
.msg.peer { align-self: flex-start; }
.msg.own { align-self: flex-end; align-items: flex-end; }
.msg.system { align-self: center; max-inline-size: 90%; }
.msg.system .bubble { background: transparent; color: var(--fg-dim); font-size: 12.5px; text-align: center; padding: 2px 6px; }
.sender { font-size: 12px; color: var(--accent); font-weight: 600; padding-inline: 4px; }
.bubble {
  position: relative; padding: 8px 11px; border-radius: var(--radius);
  background: var(--peer); border: 1px solid var(--line);
  white-space: pre-wrap; overflow-wrap: anywhere; word-break: break-word;
}
.msg.own .bubble { background: var(--mine); border-color: transparent; }
.msg.pending .bubble { opacity: .55; }
.msg.failed .bubble { border-color: var(--danger); }
.meta { display: flex; align-items: center; gap: 5px; font-size: 11px; color: var(--fg-dim); margin-top: 3px; }
.msg.own .meta { justify-content: flex-end; }
.ticks { letter-spacing: -3px; font-size: 12px; color: var(--fg-dim); }
.ticks.read { color: var(--ok); }
/* media inside bubbles */
.bubble .media-img { display: block; border-radius: 12px; max-inline-size: 100%; max-block-size: 300px; cursor: zoom-in; background: var(--bg-3); }
.bubble .with-caption { margin-bottom: 5px; }
.file-chip { display: flex; align-items: center; gap: 10px; text-decoration: none; color: inherit; }
.file-ico { inline-size: 40px; block-size: 40px; border-radius: 11px; background: var(--bg-3); display: grid; place-items: center; color: var(--accent); flex: none; font-size: 11px; font-weight: 700; }
.file-meta { min-inline-size: 0; }
.file-meta b { display: block; font-size: 13.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-inline-size: 220px; }
.file-meta small { color: var(--fg-dim); font-size: 12px; }

/* audio player */
.audio { display: flex; align-items: center; gap: 9px; min-inline-size: 210px; }
.play { inline-size: 38px; block-size: 38px; border-radius: 50%; border: 0; background: var(--accent); color: #fff; display: grid; place-items: center; cursor: pointer; flex: none; }
.play svg { inline-size: 17px; block-size: 17px; }
.wave { flex: 1; display: flex; flex-direction: column; gap: 5px; }
.bar { block-size: 5px; border-radius: 999px; background: var(--bg-3); overflow: hidden; cursor: pointer; }
.fill { block-size: 100%; inline-size: 0; background: var(--accent); }
.wave-bars { display: flex; align-items: center; gap: 2px; block-size: 26px; cursor: pointer; padding-block: 2px; }
.wave-bars i { flex: 1; min-inline-size: 2px; block-size: calc(4px + var(--h, .3) * 20px); border-radius: 999px; background: var(--fg-dim); opacity: .55; }
.wave-bars i.on { background: var(--accent); opacity: 1; }
.audio small { color: var(--fg-dim); font-size: 11.5px; }

/* message menu */
.menu-list { display: grid; gap: 8px; }
.meta .edited { font-style: italic; }
.ticks.who { cursor: pointer; }
.seen-list { display: grid; gap: 9px; max-block-size: 50vh; overflow-y: auto; }
.seen-row { display: flex; align-items: center; gap: 10px; }
.seen-row > span:first-of-type { flex: 1; }
.seen-row .st { font-size: 12px; color: var(--fg-dim); font-weight: 400; }
.seen-row .st.on { color: var(--ok); }
.muted { color: var(--fg-dim); font-size: 13px; margin: 0; }
.field-input { inline-size: 100%; padding: 12px 14px; background: var(--bg-3); border: 1px solid var(--line); border-radius: 12px; outline: none; color: var(--fg); font: inherit; resize: vertical; }
.field-input:focus { border-color: var(--accent); }

/* location */
.loc { inline-size: 240px; }
.loc .map-box { inline-size: 100%; block-size: 130px; border-radius: 12px; overflow: hidden; position: relative; background: var(--bg-3); cursor: zoom-in; }
.loc .coords { font-size: 11.5px; color: var(--fg-dim); margin-top: 4px; direction: ltr; unicode-bidi: isolate; text-align: start; }
.map-tiles { position: absolute; inset: 0; }
.map-tiles img { position: absolute; inline-size: 256px; block-size: 256px; -webkit-user-select: none; user-select: none; }
.map-pin { position: absolute; inline-size: 26px; block-size: 26px; margin-inline-start: -13px; margin-block-start: -24px; color: var(--danger); }
.map-attr { position: absolute; inset-block-end: 0; inset-inline-end: 0; font-size: 9.5px; background: rgba(0,0,0,.45); color: #fff; padding: 1px 5px; border-start-start-radius: 6px; }

/* typing */
.typing { display: inline-flex; gap: 4px; align-items: center; padding: 8px 12px; background: var(--peer); border: 1px solid var(--line); border-radius: var(--radius); margin-block-start: 4px; width: fit-content; }
.typing span { inline-size: 7px; block-size: 7px; border-radius: 50%; background: var(--fg-dim); animation: bl 1.2s infinite; }
.typing span:nth-child(2) { animation-delay: .18s; }
.typing span:nth-child(3) { animation-delay: .36s; }
@keyframes bl { 0%, 60%, 100% { opacity: .3; transform: translateY(0) } 30% { opacity: 1; transform: translateY(-3px) } }

/* composer */
.composer { position: relative; display: flex; align-items: flex-end; gap: 7px; padding: 9px 10px calc(9px + env(safe-area-inset-bottom)); background: var(--bg-2); border-top: 1px solid var(--line); }
#input {
  flex: 1; resize: none; max-block-size: 130px; padding: 10px 13px; border-radius: 15px;
  background: var(--bg-3); border: 1px solid var(--line); outline: none; line-height: 1.5;
}
#input:focus { border-color: var(--accent); }
.attach-menu {
  position: absolute; inset-block-end: calc(100% - 2px); inset-inline-start: 10px;
  background: var(--bg-2); border: 1px solid var(--line); border-radius: 14px; padding: 5px;
  box-shadow: var(--shadow); display: grid; gap: 2px; z-index: 5;
}
.attach-menu button { display: flex; align-items: center; gap: 9px; padding: 9px 12px; border: 0; background: transparent; border-radius: 10px; cursor: pointer; text-align: start; }
.attach-menu button:hover { background: var(--bg-3); }
.bubble .media-video { display: block; inline-size: min(280px, 100%); max-block-size: 320px; border-radius: 12px; background: #000; }
.waiting { color: var(--fg-dim); font-size: 13px; }
.emoji-pop {
  position: absolute; inset-block-end: calc(100% - 2px); inset-inline-end: 8px;
  inline-size: min(340px, calc(100% - 16px)); background: var(--bg-2); border: 1px solid var(--line);
  border-radius: 16px; box-shadow: var(--shadow); z-index: 6; display: flex; flex-direction: column;
}
.emoji-scroll { max-block-size: 40vh; overflow-y: auto; padding: 6px 10px; }
.emoji-cat { font-size: 13px; color: var(--fg-dim); margin: 8px 2px 4px; }
.emoji-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(38px, 1fr)); gap: 2px; }
.emoji { border: 0; background: transparent; font-size: 24px; line-height: 1; padding: 6px 0; border-radius: 10px; cursor: pointer; color: inherit; }
.emoji:hover { background: var(--bg-3); }
.emoji-bar { display: flex; gap: 6px; padding: 8px; border-top: 1px solid var(--line); }
.emoji-tool { flex: 1; padding: 9px; border-radius: 10px; border: 1px solid var(--line); background: var(--bg-3); color: var(--fg); cursor: pointer; font-size: 15px; }
.emoji-tool.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); border-color: transparent; color: #fff; font-weight: 600; }
.mic.recording { background: var(--danger); color: #fff; }
.recbar { display: flex; align-items: center; gap: 10px; padding: 12px; background: var(--bg-2); border-top: 1px solid var(--line); }
.rec-dot { inline-size: 11px; block-size: 11px; border-radius: 50%; background: var(--danger); animation: pulse 1s infinite; }
@keyframes pulse { 50% { opacity: .25 } }
.rec-meter { flex: 1; display: flex; align-items: center; gap: 3px; block-size: 26px; min-inline-size: 60px; }
.rec-meter i { flex: 1; block-size: calc(4px + var(--h, .06) * 22px); border-radius: 999px; background: var(--accent); opacity: .85; transition: block-size .09s linear; }

/* info panel */
.panel { position: absolute; inset: 0; background: var(--bg); z-index: 6; display: flex; flex-direction: column; }
.panel-head { display: flex; align-items: center; gap: 10px; padding: 12px; background: var(--bg-2); border-bottom: 1px solid var(--line); }
.panel-body { flex: 1; overflow-y: auto; padding: 14px; display: grid; gap: 14px; align-content: start; }
.card { background: var(--bg-2); border: 1px solid var(--line); border-radius: 16px; padding: 13px; display: grid; gap: 9px; }
.card h3 { margin: 0; font-size: 14px; }
.card p { margin: 0; color: var(--fg-dim); font-size: 13px; }
.member { display: flex; align-items: center; gap: 10px; }
.member .st { margin-inline-start: auto; font-size: 12px; color: var(--fg-dim); }
.member .st.on { color: var(--ok); }
.code-box { display: flex; align-items: center; gap: 8px; }
.code {
  font-family: ui-monospace, "SF Mono", Consolas, monospace; font-size: 19px; letter-spacing: 3px;
  background: var(--bg-3); border: 1px dashed var(--line); border-radius: 12px; padding: 9px 14px; direction: ltr;
}

/* avatars */
.avatar {
  inline-size: 40px; block-size: 40px; border-radius: 50%; flex: none; display: grid; place-items: center;
  font-weight: 700; font-size: 15px; color: #fff; background: linear-gradient(135deg, #5c7cfa, #845ef7);
  overflow: hidden;
}
.avatar.sm { inline-size: 34px; block-size: 34px; font-size: 13px; }
.avatar.g { background: linear-gradient(135deg, #12b886, #0ca678); }
.avatar img { inline-size: 100%; block-size: 100%; object-fit: cover; display: block; }
.avatar.lg { inline-size: 76px; block-size: 76px; font-size: 28px; }
.av-row { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.av-text { display: flex; flex-direction: column; line-height: 1.3; min-inline-size: 0; }
.av-text strong { font-size: 16px; }
.av-text small { color: var(--fg-dim); }
.sec { margin: 18px 0 8px; font-size: 14px; color: var(--fg-dim); font-weight: 600; }
.field.ltr input { direction: ltr; text-align: left; }

/* sheets, modals, toast */
.sheet { position: fixed; inset: 0; background: rgba(0, 0, 0, .55); display: grid; place-items: center; padding: 18px; z-index: 40; }
.sheet-card { background: var(--bg-2); border: 1px solid var(--line); border-radius: 20px; padding: 18px; inline-size: min(430px, 100%); max-block-size: 86dvh; overflow-y: auto; box-shadow: var(--shadow); }
.sheet-card h2 { margin: 0 0 4px; font-size: 17px; }
.sheet-card .row { display: flex; gap: 8px; margin-top: 14px; }
.sheet-card .row .btn { flex: 1; }
.pick { display: flex; align-items: center; gap: 10px; padding: 8px; border-radius: 12px; cursor: pointer; }
.pick:hover { background: var(--bg-3); }
.pick input { inline-size: 18px; block-size: 18px; }
.notice { background: var(--bg-3); border-radius: 12px; padding: 10px 12px; font-size: 13px; color: var(--fg-dim); }
.lightbox { position: fixed; inset: 0; background: rgba(0, 0, 0, .9); display: grid; place-items: center; z-index: 50; }
.lightbox img { max-inline-size: 96vw; max-block-size: 92vh; border-radius: 8px; }
.lb-close { position: fixed; inset-block-start: 14px; inset-inline-end: 14px; color: #fff; z-index: 2; }
.map-card { background: var(--bg-2); border: 1px solid var(--line); border-radius: 20px; inline-size: min(560px, 100%); overflow: hidden; }
.map-card header, .map-card footer { display: flex; align-items: center; gap: 8px; padding: 11px 13px; }
.map-card footer { border-top: 1px solid var(--line); }
#map-coords { direction: ltr; unicode-bidi: isolate; color: var(--fg-dim); }
.map-stage { position: relative; inline-size: 100%; block-size: min(52vh, 380px); background: var(--bg-3); overflow: hidden; }
.map-stage .map-box { position: absolute; inset: 0; inline-size: 100%; block-size: 100%; border-radius: 0; }
.toast {
  position: fixed; inset-block-end: calc(84px + env(safe-area-inset-bottom)); inset-inline: 14px;
  background: var(--bg-3); border: 1px solid var(--line); color: var(--fg); padding: 11px 14px;
  border-radius: 14px; box-shadow: var(--shadow); z-index: 60; opacity: 0; transform: translateY(14px);
  transition: .22s; pointer-events: none; text-align: center; font-size: 13.5px;
}
.toast.show { opacity: 1; transform: none; }
.toast.err { border-color: var(--danger); color: #ffd9d9; }

/* small screens: one pane at a time */
@media (max-width: 780px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { position: absolute; inset: 0; z-index: 3; }
  .main { position: absolute; inset: 0; z-index: 4; visibility: hidden; }
  .app[data-view="thread"] .main { visibility: visible; }
  .app[data-view="thread"] .sidebar { z-index: 2; }
  .back { display: grid; }
  .msg { max-inline-size: 86%; }
}