:root {
  --bg: #0b1220;
  --panel: #111a2e;
  --panel-2: #17223a;
  --line: #243251;
  --text: #e6ecf7;
  --muted: #8b9ab8;
  --accent: #3b82f6;
  --accent-2: #2563eb;
  --mine: #1d4ed8;
  --theirs: #1e293b;
  --ok: #22c55e;
  --warn: #f59e0b;
  --bad: #ef4444;
  --radius: 12px;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #eef2f8; --panel: #ffffff; --panel-2: #f4f6fb; --line: #dde3ee; --text: #0f172a;
    --muted: #5b6782; --mine: #2563eb; --theirs: #e8edf5; color-scheme: light;
  }
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg); color: var(--text);
  -webkit-tap-highlight-color: transparent;
}
[hidden] { display: none !important; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; border: 1px solid var(--line); background: var(--panel-2); border-radius: 8px; padding: .5em .9em; }
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.primary:hover { background: var(--accent-2); }
button.danger { color: var(--bad); }
button.link { background: none; border: none; color: var(--accent); padding: .25em; }
button.icon { width: 36px; height: 36px; padding: 0; display: inline-grid; place-items: center; font-size: 18px; }
button:disabled { opacity: .5; cursor: default; }
input, textarea, select {
  width: 100%; background: var(--panel-2); border: 1px solid var(--line); border-radius: 8px; padding: .55em .7em;
}
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
label { display: block; margin: .8em 0; color: var(--muted); font-size: .9em; }
label input, label textarea, label select { margin-top: .3em; color: var(--text); font-size: 1rem; }
h1 { font-size: 1.5em; margin: .3em 0; }
h2 { font-size: 1.15em; margin: 0 0 .6em; }
h3 { font-size: 1em; margin: 1.2em 0 .4em; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; font-size: .78em; }
.muted { color: var(--muted); }
.small { font-size: .82em; }
.strong { font-weight: 600; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .85em; word-break: break-all; }
.row { display: flex; gap: .5em; align-items: center; flex-wrap: wrap; }
.row.end { justify-content: flex-end; }
.grow { flex: 1; }
.center-screen { min-height: 100%; display: grid; place-items: center; padding: 1.5em; text-align: center; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.5em; }
.narrow { width: min(420px, 100%); text-align: left; }
.narrow .primary { width: 100%; margin-top: .5em; padding: .75em; }
.logo { width: 64px; height: 64px; display: block; margin: 0 auto .5em; }
.logo-sm { width: 32px; height: 32px; }
#onboard h1, #onboard .logo { text-align: center; }
.spinner { width: 32px; height: 32px; border: 3px solid var(--line); border-top-color: var(--accent); border-radius: 50%; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(1turn); } }

#main { display: grid; grid-template-columns: 340px 1fr; height: 100dvh; }
#sidebar { background: var(--panel); border-right: 1px solid var(--line); display: flex; flex-direction: column; min-height: 0; }
.bar { display: flex; align-items: center; justify-content: space-between; gap: .5em; padding: .6em .8em; border-bottom: 1px solid var(--line); min-height: 60px; padding-top: max(.6em, env(safe-area-inset-top)); }
.me { display: flex; align-items: center; gap: .6em; min-width: 0; }
.me > div { min-width: 0; }
.actions { display: flex; gap: .3em; }
.pill { white-space: nowrap; border: none; background: none; padding: 0; font-size: .8em; color: var(--muted); display: inline-flex; align-items: center; gap: .35em; }
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; background: var(--muted); flex: none; }
.dot.ok { background: var(--ok); }
.dot.warn { background: var(--warn); }
.dot.bad { background: var(--bad); }
.tabs { display: flex; border-bottom: 1px solid var(--line); }
.tabs button { flex: 1; border: none; border-radius: 0; background: none; padding: .7em; color: var(--muted); border-bottom: 2px solid transparent; }
.tabs button.active { color: var(--text); border-bottom-color: var(--accent); }
.badge { background: var(--accent); color: #fff; border-radius: 999px; padding: 0 .45em; font-size: .75em; margin-left: .3em; }
.list { list-style: none; margin: 0; padding: 0; overflow-y: auto; flex: 1; }
.list li { padding: .75em .9em; border-bottom: 1px solid var(--line); display: flex; gap: .7em; align-items: center; cursor: pointer; }
.list li:hover, .list li.active { background: var(--panel-2); }
.list li.static { cursor: default; }
.list li.static:hover { background: none; }
.list .info { flex: 1; min-width: 0; }
.list .title { display: flex; justify-content: space-between; gap: .5em; }
.list .title span:first-child { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.list .preview { color: var(--muted); font-size: .88em; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.list .empty { color: var(--muted); justify-content: center; text-align: center; cursor: default; flex-direction: column; padding: 2em 1em; }
.avatar { width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center; font-weight: 700; color: #fff; flex: none; position: relative; }
.avatar .dot { position: absolute; right: 0; bottom: 0; width: 11px; height: 11px; border: 2px solid var(--panel); }
.request { background: color-mix(in srgb, var(--accent) 10%, transparent); }
.note { padding: .8em; font-size: .85em; color: var(--warn); border-top: 1px solid var(--line); }

#chat { display: flex; flex-direction: column; min-height: 0; min-width: 0; }
#chatEmpty { flex: 1; }
button.back { display: none; }
.chat-title { border: none; background: none; text-align: left; display: flex; flex-direction: column; padding: 0; flex: 1; min-width: 0; }
.chat-title span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 100%; }
#messages { flex: 1; overflow-y: auto; padding: 1em; display: flex; flex-direction: column; gap: 2px; }
.msg { max-width: min(75%, 640px); padding: .45em .75em; border-radius: 14px; background: var(--theirs); align-self: flex-start; position: relative; white-space: pre-wrap; overflow-wrap: anywhere; }
.msg.mine { background: var(--mine); color: #fff; align-self: flex-end; }
.msg.first { margin-top: .6em; }
.msg .who { font-size: .78em; font-weight: 600; color: var(--accent); margin-bottom: .1em; }
.msg .meta { font-size: .7em; color: color-mix(in srgb, currentColor 65%, transparent); margin-left: .8em; float: right; margin-top: .35em; user-select: none; }
.msg.deleted { font-style: italic; opacity: .6; }
.msg .more { position: absolute; top: -9px; right: -9px; width: 24px; height: 24px; padding: 0; border-radius: 50%; font-size: 14px; display: none; line-height: 1; color: var(--text); }
.msg.mine .more { right: auto; left: -9px; }
.msg:hover .more, .msg.sel .more { display: grid; place-items: center; }
.msg.sel { outline: 2px solid var(--accent); outline-offset: 1px; }
.msg.flash { animation: flash 2s ease-out; }
@keyframes flash { 0%, 40% { box-shadow: 0 0 0 3px var(--warn); } 100% { box-shadow: 0 0 0 3px transparent; } }
.msg .tick { margin-left: .35em; font-size: 1.3em; line-height: 1; letter-spacing: -.3em; padding-right: .3em; vertical-align: -.05em; }
.msg .tick.read { color: #a5f3fc; font-weight: 700; }
.typing, .chat-title span.typing { color: var(--accent); font-style: italic; }
.typing-row { align-self: flex-start; font-size: .8em; color: var(--muted); font-style: italic; margin: .4em .2em; }
#searchBar { padding: .5em .8em; border-bottom: 1px solid var(--line); }
#searchBar input { padding: .4em .7em; }
mark { background: color-mix(in srgb, var(--warn) 45%, transparent); color: inherit; border-radius: 2px; }
.quote { background: var(--panel-2); border-left: 3px solid var(--accent); padding: .5em .8em; border-radius: 6px; white-space: pre-wrap; overflow-wrap: anywhere; max-height: 30vh; overflow-y: auto; }
.list.receipts { max-height: 40vh; border: 1px solid var(--line); border-radius: 8px; }
.day { align-self: center; font-size: .75em; color: var(--muted); margin: 1em 0 .4em; }
.notice { align-self: center; max-width: min(520px, 92%); margin: .4em 0 .8em; padding: .7em .9em; font-size: .9em; border: 1px solid var(--warn); border-radius: 8px; background: color-mix(in srgb, var(--warn) 12%, transparent); }
.notice p { margin: 0 0 .6em; }
.sysmsg { align-self: center; font-size: .8em; color: var(--muted); margin: .6em 0; text-align: center; max-width: 80%; }
#composer { display: flex; gap: .5em; padding: .6em; border-top: 1px solid var(--line); background: var(--panel); padding-bottom: max(.6em, env(safe-area-inset-bottom)); }
#composer textarea { resize: none; max-height: 30vh; }
#composer .attach { flex: none; align-self: flex-end; height: 40px; }
#chat.drop { outline: 3px dashed var(--accent); outline-offset: -6px; }
.att { margin: -.2em -.45em .25em; }
.att:empty { display: none; }
.att-img { display: block; max-width: min(100%, 360px); max-height: 360px; border-radius: 10px; cursor: zoom-in; background: rgb(0 0 0 / .15); object-fit: cover; }
video.att-img { cursor: default; }
.att-img.blur { filter: blur(8px); transform: scale(.98); cursor: default; }
.att audio { width: min(300px, 70vw); display: block; }
.att-file { display: flex; align-items: center; gap: .6em; padding: .45em .6em; background: rgb(0 0 0 / .12); border-radius: 10px; min-width: 200px; white-space: normal; }
.att-file.small { margin-top: .3em; padding: .3em .5em; }
.att-icon { font-size: 1.5em; }
.att-name { font-weight: 600; overflow-wrap: anywhere; }
.att-meta { font-size: .78em; opacity: .75; }
.att-save { padding: .3em .7em; font-size: .85em; }
.msg.mine .att-save { background: rgb(255 255 255 / .15); color: #fff; border-color: rgb(255 255 255 / .3); }
img.viewer { display: block; max-width: 100%; max-height: 70dvh; margin: 0 auto; border-radius: 8px; }

dialog { border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); color: var(--text); padding: 0; width: min(520px, calc(100vw - 1.5em)); max-height: calc(100dvh - 2em); }
dialog::backdrop { background: rgb(0 0 0 / .55); }
#dialogBody { padding: 1.3em; overflow-y: auto; max-height: calc(100dvh - 2em); }
.dlg-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: .6em; }
.dlg-head h2 { margin: 0; }
.qr { display: block; margin: .5em auto; background: #fff; padding: 10px; border-radius: 8px; width: min(260px, 100%); height: auto; image-rendering: pixelated; }
.codebox { width: 100%; min-height: 4.5em; font-family: ui-monospace, monospace; font-size: .78em; word-break: break-all; }
.section { border-top: 1px solid var(--line); margin-top: 1em; padding-top: .3em; }
.checklist { max-height: 40vh; overflow-y: auto; border: 1px solid var(--line); border-radius: 8px; }
.checklist label { display: flex; align-items: center; gap: .6em; margin: 0; padding: .6em .8em; color: var(--text); border-bottom: 1px solid var(--line); font-size: 1em; }
.checklist input { width: auto; margin: 0; }
.safety { font-family: ui-monospace, monospace; font-size: 1.1em; letter-spacing: .05em; text-align: center; padding: .6em; background: var(--panel-2); border-radius: 8px; }
video.scan { width: 100%; border-radius: 8px; background: #000; }
.steps { padding-left: 1.2em; color: var(--muted); }
.or { text-align: center; margin: 1.2em 0 .4em; }
.tagline { text-align: center; font-size: 1.05em; margin: .2em 0 .8em; }
.pitch { list-style: none; padding: 0; margin: 0 0 .4em; display: grid; gap: .7em; }
.pitch li { display: flex; gap: .7em; align-items: flex-start; font-size: .93em; color: var(--muted); }
.pitch li strong { color: var(--text); }
.pitch li > span { font-size: 1.4em; line-height: 1.1; }
#onboardHow { display: block; margin: 0 auto .4em; }
.how { display: flex; gap: .8em; align-items: flex-start; }
.how-icon { font-size: 1.6em; line-height: 1.4; }
.how h3 { margin-top: .9em; color: var(--text); text-transform: none; letter-spacing: 0; font-size: 1em; }
.how p { margin: .3em 0; color: var(--muted); font-size: .93em; }
.sysmsg .link { padding: 0; font-size: inherit; }
details.advanced { margin: 1em 0; border: 1px solid var(--line); border-radius: 8px; padding: .5em .8em; }
details.advanced summary { cursor: pointer; color: var(--muted); }
.invite-banner { background: color-mix(in srgb, var(--accent) 15%, transparent); border: 1px solid var(--accent); border-radius: 8px; padding: .7em .9em; margin: .8em 0; }
.qr-btn { display: block; margin: .5em auto; padding: 0; border: none; background: none; }
.qr-btn .qr { margin: 0; }
.big-qr .qr { width: min(80vmin, 460px); }
.share-row { margin: .6em 0; }
.center { text-align: center; }
details input { margin-top: .4em; }
.list .empty .link { margin-top: .4em; }
#onboardLink { width: 100%; padding: .7em; }
.progress { height: 8px; background: var(--panel-2); border-radius: 4px; overflow: hidden; margin: .6em 0; }
.progress > div { height: 100%; background: var(--accent); width: 0; transition: width .2s; }
.warn { color: var(--warn); }
.steps li { margin: .3em 0; }

#toast { position: fixed; left: 50%; bottom: 1.5em; transform: translateX(-50%); background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px; padding: .7em 1em; box-shadow: 0 8px 30px rgb(0 0 0 / .3); display: none; align-items: center; gap: .8em; z-index: 10; max-width: calc(100vw - 2em); }
#toast.show { display: flex; }

@media (max-width: 760px) {
  #main { grid-template-columns: 1fr; }
  #main.in-chat #sidebar { display: none; }
  #main:not(.in-chat) #chat { display: none; }
  button.back { display: inline-grid; }
  .msg { max-width: 85%; }
}