:root {
  color-scheme: light;
  --bg: #f2f5f3; --paper: #fff; --ink: #242d28; --muted: #626b64;
  --line: #dce4de; --accent: #296244; --accent-hover: #1c4b32;
  --bubble: #e3eee6; --bubble-line: #d0dfd4; --hover: #e5ece7;
  --error: #a02d25; --focus: #398454; --selection: #bad9c5; --on-accent: #fff;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--ink); background: var(--bg); font-size: 16px;
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #141c19; --paper: #1c2721; --ink: #e7efe9; --muted: #a4b5a9;
  --line: #34483b; --accent: #acd4b5; --accent-hover: #c3e4ca;
  --bubble: #293f31; --bubble-line: #3b5844; --hover: #2b3d31;
  --error: #ffb4aa; --focus: #b7e0c1; --selection: #466a50; --on-accent: #18291d;
}
* { box-sizing: border-box; }
body { margin: 0; height: var(--app-height, 100dvh); display: flex; flex-direction: column; overflow: hidden; }
::selection { background: var(--selection); color: var(--ink); }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }
button, input, textarea { font: inherit; }
button { cursor: pointer; border: 0; border-radius: 10px; padding: 12px 18px; background: var(--accent); color: var(--on-accent); font-weight: 600; transition: background .15s; }
button:hover { background: var(--accent-hover); }
button:disabled { opacity: .55; cursor: wait; }
svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; }
.quiet { background: transparent; color: var(--muted); padding: 10px 12px; }
.quiet:hover { background: var(--hover); color: var(--ink); }
.top { flex-shrink: 0; display: flex; align-items: center; gap: 24px; min-height: 72px; padding: 12px max(24px, calc((100vw - 1120px) / 2)); border-bottom: 1px solid var(--line); background: var(--paper); }
.brand { color: var(--ink); text-decoration: none; font-size: 25px; font-weight: 750; letter-spacing: -.035em; display: flex; align-items: center; gap: 5px; }
.brand-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); margin-top: 13px; }
.tagline { font-size: 13px; color: var(--muted); }
.top-actions { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.theme-toggle { display: flex; align-items: center; gap: 8px; font-size: 13px; }
.sun, [data-theme="dark"] .moon { display: none; }
[data-theme="dark"] .sun { display: block; }
main { flex: 1; min-height: 0; width: 100%; display: flex; flex-direction: column; }
#workspace { display: flex; flex-direction: column; min-height: 0; flex: 1; width: min(100%, 960px); margin: auto; border-inline: 1px solid var(--line); }
.chat-header { flex-shrink: 0; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 20px 28px; background: var(--paper); border-bottom: 1px solid var(--line); }
.chat-identity { display: flex; align-items: center; gap: 13px; }
.chat-avatar { display: grid; place-items: center; width: 44px; height: 44px; background: var(--bubble); border-radius: 14px; color: var(--accent); }
h1 { margin: 0 0 5px; font-size: 18px; letter-spacing: -.025em; }
#count { font-size: 13px; font-weight: 400; margin-left: 5px; color: var(--muted); }
#connection { font-size: 12px; color: var(--muted); }
.search-label { display: flex; align-items: center; gap: 8px; width: 240px; color: var(--muted); }
.search-label svg { width: 18px; }
input, textarea { color: var(--ink); caret-color: var(--accent); }
input { width: 100%; padding: 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--paper); }
input[type="search"] { min-width: 0; background: transparent; border: 0; padding: 10px 0; font-size: 14px; }
input::placeholder, textarea::placeholder { color: var(--muted); opacity: 1; }
.history-wrap { flex: 1; min-height: 0; position: relative; }
.history { height: 100%; overflow: auto; overscroll-behavior: contain; scrollbar-color: var(--line) transparent; scrollbar-width: thin; }
.history-content { min-height: 100%; display: flex; flex-direction: column; padding: 20px 28px 28px; }
#notes { margin-top: auto; display: flex; flex-direction: column; align-items: flex-end; gap: 12px; }
.day-divider { align-self: center; color: var(--muted); font-size: 12px; padding: 14px 0 6px; text-align: center; }
.note { width: fit-content; max-width: 84%; background: var(--bubble); border: 1px solid var(--bubble-line); border-radius: 14px 14px 4px 14px; padding: 14px 16px 9px; }
.note-text { white-space: pre-wrap; overflow-wrap: anywhere; font: inherit; font-size: 15px; line-height: 1.65; margin: 0; tab-size: 4; }
.note-meta { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; margin-top: 10px; }
.note time { font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; }
.note-actions { display: flex; gap: 2px; }
.note-actions button { font-size: 12px; padding: 6px 8px; min-height: 32px; }
.latest { position: absolute; bottom: 16px; left: 50%; transform: translateX(-50%); white-space: nowrap; padding: 11px 18px; font-size: 13px; box-shadow: 0 5px 16px #0002; }
.empty { margin: auto; text-align: center; padding: 32px 12px; }
.empty-mark { display: grid; place-items: center; width: 64px; height: 64px; margin: 0 auto 12px; color: var(--accent); }
.empty-mark svg { width: 28px; height: 28px; }
h2 { font-size: 20px; margin: 0 0 10px; letter-spacing: -.025em; }
p { line-height: 1.6; color: var(--muted); margin: 0; }
.empty p { font-size: 14px; }
.composer-area { flex-shrink: 0; padding: 16px 28px max(12px, env(safe-area-inset-bottom)); background: var(--paper); border-top: 1px solid var(--line); }
.composer { display: flex; align-items: flex-end; gap: 12px; border: 1px solid var(--line); border-radius: 14px; padding: 8px; background: var(--bg); }
.composer:focus-within { border-color: var(--focus); }
textarea { display: block; flex: 1; min-width: 0; width: 100%; resize: none; min-height: 44px; max-height: min(180px, 28dvh); border: 0; background: transparent; line-height: 1.5; padding: 10px 8px; scrollbar-color: var(--line) transparent; }
textarea:focus { outline: 0; }
#send { display: grid; place-items: center; width: 44px; height: 44px; padding: 0; flex-shrink: 0; }
#send.sending svg { opacity: .45; }
.compose-footer { display: flex; justify-content: space-between; gap: 12px; color: var(--muted); font-size: 12px; padding: 9px 3px 0; }
#notice, .login-feedback { font-size: 14px; color: var(--error); }
.feedback:has(:not([hidden])) { margin-bottom: 12px; }
.feedback .quiet { font-size: 13px; padding-left: 0; }
.login { width: min(100%, 440px); margin: auto; padding: 32px 24px; overflow: auto; }
.login h1 { font-size: 40px; line-height: 1.15; letter-spacing: -.035em; }
.login p { margin: 18px 0 30px; }
.login label { display: block; margin-bottom: 8px; font-size: 14px; }
.login button { width: 100%; margin-top: 14px; }
.login-feedback { text-align: center; padding: 12px 24px; }
dialog { max-width: 440px; width: calc(100% - 40px); padding: 28px; border: 1px solid var(--line); border-radius: 14px; color: var(--ink); background: var(--paper); }
dialog::backdrop { background: #08120db3; }
dialog p { margin: 16px 0 24px; }
.dialog-actions { display: flex; gap: 12px; justify-content: flex-end; }
.danger { background: var(--error); color: var(--paper); }
.danger:hover { background: var(--error); filter: brightness(.9); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
[hidden] { display: none !important; }
@media (max-width: 600px) {
  .top { min-height: 60px; padding: 8px 16px; gap: 12px; }
  .brand { font-size: 23px; }
  .tagline, #theme-label { display: none; }
  .top-actions { gap: 2px; }
  .theme-toggle { padding: 10px; }
  #workspace { border: 0; }
  .chat-header { padding: 14px 16px; flex-wrap: wrap; gap: 8px; }
  .chat-avatar { width: 38px; height: 38px; border-radius: 12px; }
  .search-label { width: 100%; padding-left: 3px; }
  input[type="search"] { font-size: 16px; padding: 6px 0; }
  .history-content { padding: 10px 14px 18px; }
  .note { max-width: 94%; padding: 12px 13px 7px; }
  .note-actions button { min-height: 40px; }
  .composer-area { padding: 12px 12px max(8px, env(safe-area-inset-bottom)); }
  .compose-footer { font-size: 12px; }
  .compose-footer > :first-child { display: none; }
  .compose-footer > :last-child { margin-left: auto; }
  .login h1 { font-size: 34px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }