/* Buzz — premium theme */
@font-face {
  font-family: 'Inter';
  src: url('/fonts/inter-latin.woff2') format('woff2');
  font-weight: 100 900;
  font-display: swap;
}
:root {
  --bg: #F4F5F1;
  --bg-grad-1: #FFFFFF;
  --bg-grad-2: #EEF0E7;
  --panel: rgba(255,255,255,.82);
  --panel-2: #FFFFFF;
  --border: rgba(24,28,16,.09);
  --text: #171A12;
  --text-2: #5C6352;
  --accent: #9DBB2E;
  --accent-soft: rgba(157,187,46,.14);
  --accent-ink: #161A05;
  --danger: #E5484D;
  --shadow: 0 1px 2px rgba(23,26,18,.04), 0 12px 32px rgba(23,26,18,.07);
  --r-lg: 24px;
  --r-md: 14px;
  --r-sm: 10px;
  --safe-t: env(safe-area-inset-top, 0px);
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-l: env(safe-area-inset-left, 0px);
  --safe-r: env(safe-area-inset-right, 0px);
}
html.dark {
  --bg: #0E100B;
  --bg-grad-1: #151709;
  --bg-grad-2: #0B0C08;
  --panel: rgba(255,255,255,.055);
  --panel-2: rgba(255,255,255,.09);
  --border: rgba(255,255,255,.09);
  --text: #F4F6EE;
  --text-2: #9BA393;
  --accent: #D7F24A;
  --accent-soft: rgba(215,242,74,.12);
  --accent-ink: #141805;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 12px 32px rgba(0,0,0,.35);
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; height: 100%; }
body {
  background: linear-gradient(170deg, var(--bg-grad-1), var(--bg-grad-2));
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
  transition: background .3s;
  letter-spacing: -.01em;
}
.screen { position: fixed; inset: 0; display: flex; flex-direction: column; }
.hidden { display: none !important; }

/* ---------- login ---------- */
#login { align-items: center; justify-content: center; padding: calc(var(--safe-t) + 24px) 24px calc(var(--safe-b) + 24px); background:
  radial-gradient(700px 480px at 88% -12%, rgba(157,187,46,.16), transparent 62%),
  radial-gradient(560px 420px at -8% 102%, rgba(157,187,46,.10), transparent 60%),
  linear-gradient(170deg, var(--bg-grad-1), var(--bg-grad-2)); }
.login-card { width: 100%; max-width: 400px; background: var(--panel); border: 1px solid var(--border); border-radius: 28px; padding: 32px 26px; backdrop-filter: blur(24px) saturate(1.6); box-shadow: var(--shadow); }
.logo-mark { width: 60px; height: 60px; border-radius: 18px; background: linear-gradient(145deg, var(--accent), color-mix(in srgb, var(--accent) 55%, #6b8a10)); display: flex; align-items: center; justify-content: center; box-shadow: 0 10px 28px rgba(157,187,46,.35); margin-bottom: 18px; }
.logo-mark svg path { fill: #fff; }
.login-card h1 { margin: 0; font-size: 28px; font-weight: 800; letter-spacing: -.03em; }
.sub { color: var(--text-2); font-size: 13.5px; margin: 5px 0 24px; }
label { display: block; font-size: 12px; font-weight: 600; color: var(--text-2); margin: 16px 0 7px; letter-spacing: .03em; text-transform: uppercase; font-size: 10.5px; }
.field { width: 100%; background: var(--panel-2); border: 1px solid var(--border); color: var(--text); border-radius: var(--r-md); padding: 15px 16px; font-size: 16px; outline: none; transition: border-color .15s, box-shadow .15s; appearance: none; font-family: inherit; }
select.field { background-image: linear-gradient(45deg, transparent 50%, var(--text-2) 50%), linear-gradient(135deg, var(--text-2) 50%, transparent 50%); background-position: calc(100% - 20px) 50%, calc(100% - 15px) 50%; background-size: 5px 5px; background-repeat: no-repeat; }
.field:focus { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.btn-primary { width: 100%; margin-top: 24px; background: linear-gradient(145deg, var(--accent), color-mix(in srgb, var(--accent) 70%, #000 8%)); color: var(--accent-ink); border: none; border-radius: var(--r-md); padding: 16px; font-size: 16px; font-weight: 700; letter-spacing: .01em; cursor: pointer; transition: transform .12s ease, box-shadow .2s, opacity .2s; box-shadow: 0 10px 26px rgba(157,187,46,.30); font-family: inherit; }
.btn-primary:active { transform: scale(.97); }
.btn-primary:disabled { opacity: .5; }
.err { color: var(--danger); font-size: 13px; min-height: 18px; margin: 10px 0 0; }

/* ---------- top bar ---------- */
.topbar { display: flex; align-items: center; gap: 10px; padding: calc(var(--safe-t) + 12px) calc(var(--safe-l) + 14px) 12px calc(var(--safe-r) + 14px); border-bottom: 1px solid var(--border); background: color-mix(in srgb, var(--bg) 72%, transparent); backdrop-filter: blur(20px) saturate(1.6); position: relative; z-index: 5; }
.brand { font-size: 19px; font-weight: 800; letter-spacing: -.02em; display: flex; align-items: center; gap: 9px; flex: 1; }
.logo-mini { width: 26px; height: 26px; border-radius: 8px; background: linear-gradient(145deg, var(--accent), color-mix(in srgb, var(--accent) 55%, #6b8a10)); display: inline-block; }
.icon-btn { width: 38px; height: 38px; border-radius: 12px; border: 1px solid var(--border); background: var(--panel); color: var(--text); font-size: 16px; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: transform .12s, background .15s; backdrop-filter: blur(10px); }
.icon-btn:active { transform: scale(.9); }
.chat-title { flex: 1; text-align: center; min-width: 0; }
#chat-name { font-weight: 700; font-size: 16px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
#chat-sub { font-size: 11px; margin: 2px 0 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ---------- channel list ---------- */
.list { overflow-y: auto; padding: 10px 14px calc(var(--safe-b) + 16px); flex: 1; -webkit-overflow-scrolling: touch; }
.ch-item { display: flex; align-items: center; gap: 13px; padding: 14px 14px; margin-bottom: 9px; background: var(--panel); border: 1px solid var(--border); border-radius: var(--r-lg); cursor: pointer; transition: transform .12s ease, box-shadow .2s, background .2s; box-shadow: var(--shadow); }
.ch-item:active { transform: scale(.98); }
.ch-avatar { width: 46px; height: 46px; border-radius: 15px; background: linear-gradient(140deg, color-mix(in srgb, var(--accent) 85%, #fff 0%), color-mix(in srgb, var(--accent) 45%, #000 5%)); color: var(--accent-ink); font-weight: 800; font-size: 18px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; box-shadow: inset 0 0 0 1px rgba(255,255,255,.25); }
.ch-body { flex: 1; min-width: 0; }
.ch-name { font-weight: 700; font-size: 15px; display: flex; align-items: center; gap: 7px; }
.ch-prev { color: var(--text-2); font-size: 12.5px; margin-top: 3px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ch-meta { display: flex; flex-direction: column; align-items: flex-end; gap: 6px; flex-shrink: 0; }
.ch-time { color: var(--text-2); font-size: 11px; }
.unread { background: var(--accent); color: var(--accent-ink); font-size: 11px; font-weight: 800; min-width: 19px; height: 19px; border-radius: 10px; display: flex; align-items: center; justify-content: center; padding: 0 5px; }
.badge { font-size: 9.5px; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--text-2); border: 1px solid var(--border); padding: 2px 6px; border-radius: 6px; }
.ch-desc { font-size: 11px; color: var(--text-2); margin-top: 3px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ---------- chat ---------- */
.msgs { flex: 1; overflow-y: auto; padding: 14px 14px 28px; -webkit-overflow-scrolling: touch; scroll-behavior: smooth; }
.msg { display: flex; gap: 10px; margin-bottom: 16px; animation: slidein .18s ease; }
@keyframes slidein { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.msg-avatar { width: 34px; height: 34px; border-radius: 11px; background: linear-gradient(140deg, color-mix(in srgb, var(--accent) 70%, #fff), color-mix(in srgb, var(--accent) 35%, #000 6%)); color: var(--accent-ink); font-weight: 700; font-size: 13px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.msg.own .msg-avatar { background: linear-gradient(140deg, var(--accent), color-mix(in srgb, var(--accent) 55%, #000 8%)); }
.msg-body { flex: 1; min-width: 0; }
.msg-head { display: flex; align-items: baseline; gap: 8px; margin-bottom: 3px; }
.msg-name { font-weight: 700; font-size: 13.5px; }
.msg-time { color: var(--text-2); font-size: 11px; }
.msg-content { font-size: 14.5px; line-height: 1.52; word-wrap: break-word; background: var(--panel); border: 1px solid var(--border); border-radius: 4px 18px 18px 18px; padding: 10px 14px; box-shadow: 0 1px 2px rgba(23,26,18,.04); }
.msg.own .msg-content { background: var(--accent-soft); border-color: color-mix(in srgb, var(--accent) 30%, var(--border)); border-radius: 18px 4px 18px 18px; }
.msg.own { flex-direction: row-reverse; }
.msg.own .msg-head { flex-direction: row-reverse; }
.msg-content p { margin: 0 0 8px; } .msg-content p:last-child { margin-bottom: 0; }
.msg-content h1, .msg-content h2, .msg-content h3 { font-size: 15px; margin: 10px 0 6px; }
.msg-content ul, .msg-content ol { margin: 6px 0; padding-left: 20px; }
.msg-content code { background: var(--panel-2); border: 1px solid var(--border); border-radius: 5px; padding: 1px 5px; font-size: 13px; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.msg-content pre { background: var(--panel-2); border: 1px solid var(--border); border-radius: 12px; padding: 10px 12px; overflow-x: auto; font-size: 12.5px; }
.msg-content pre code { background: none; border: none; padding: 0; }
.msg-content blockquote { margin: 6px 0; padding: 4px 10px; border-left: 3px solid var(--accent); color: var(--text-2); }
.msg-content a { color: var(--accent); text-decoration: none; font-weight: 500; }
.msg-content .mention { color: var(--accent); font-weight: 600; }
.reply-quote { font-size: 12px; color: var(--text-2); background: var(--panel-2); border-left: 2px solid var(--accent); border-radius: 0 6px 6px 0; padding: 4px 8px; margin-bottom: 5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; cursor: pointer; }
.day-sep { text-align: center; color: var(--text-2); font-size: 11px; margin: 18px 0 14px; }
.day-sep span { background: var(--panel); border: 1px solid var(--border); padding: 4px 12px; border-radius: 12px; font-weight: 600; }

/* ---------- groups + search ---------- */
.ch-search-wrap { padding: 10px 14px 2px; }
.ch-search { border-radius: 12px; padding: 10px 14px; font-size: 13.5px; background: var(--panel); }
.grp { margin-bottom: 4px; }
.grp-head { display: flex; align-items: center; gap: 7px; padding: 12px 14px 6px; cursor: pointer; user-select: none; position: sticky; top: 0; z-index: 3; background: linear-gradient(180deg, var(--bg) 82%, transparent); }
.grp-caret { font-size: 10px; color: var(--text-2); width: 12px; }
.grp-title { font-size: 11px; font-weight: 800; letter-spacing: .07em; text-transform: uppercase; color: var(--text-2); }
.grp-count { font-size: 10.5px; font-weight: 700; color: var(--text-2); background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 1px 7px; }
.grp.collapsed .grp-body { display: none; }
.ch-item.unread .ch-name { font-weight: 800; }
.ch-item.unread { border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); }
.msg-thread { display: inline-block; margin-top: 5px; font-size: 11.5px; font-weight: 600; color: var(--accent); background: var(--accent-soft); border-radius: 8px; padding: 3px 9px; cursor: pointer; }

/* ---------- knowledge base ---------- */
.kb-btn { margin-left: auto; background: var(--accent); color: var(--accent-ink); border: none; border-radius: 9px; padding: 4px 12px; font-size: 12px; font-weight: 700; cursor: pointer; font-family: inherit; }
.kb-head { font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: .06em; color: var(--text-2); padding: 4px 18px 10px; }
.kb-doc { border-bottom: 1px solid var(--border); }
.kb-doc-row { display: flex; align-items: center; gap: 8px; padding: 12px 18px; cursor: pointer; }
.kb-doc-name { font-weight: 600; font-size: 14px; flex: 1; min-width: 0; }
.kb-doc-filled { font-size: 10px; font-weight: 700; color: var(--accent); background: var(--accent-soft); border-radius: 7px; padding: 2px 8px; }
.kb-doc-empty { font-size: 10px; font-weight: 700; color: var(--text-2); background: var(--panel); border-radius: 7px; padding: 2px 8px; }
.kb-doc-body { padding: 0 18px 16px; font-size: 13.5px; line-height: 1.55; color: var(--text); }
.kb-doc-body p { margin: 0 0 8px; } .kb-doc-body p:last-child { margin-bottom: 0; }
.kb-doc-body h1, .kb-doc-body h2 { font-size: 14px; margin: 10px 0 6px; }
.kb-doc-body ul, .kb-doc-body ol { margin: 6px 0; padding-left: 18px; }
.kb-doc-body code { background: var(--panel-2); border: 1px solid var(--border); border-radius: 5px; padding: 1px 5px; font-size: 12.5px; }
.kb-doc-body pre { background: var(--panel-2); border: 1px solid var(--border); border-radius: 10px; padding: 9px 11px; overflow-x: auto; font-size: 12px; }
.kb-doc-body blockquote { margin: 6px 0; padding: 4px 10px; border-left: 3px solid var(--accent); color: var(--text-2); }
.kb-doc-body table { border-collapse: collapse; margin: 8px 0; width: 100%; font-size: 12.5px; }
.kb-doc-body th, .kb-doc-body td { border: 1px solid var(--border); padding: 5px 8px; text-align: left; }
.kb-doc-body th { background: var(--panel-2); }

/* ---------- summary card ---------- */
.summary { background: linear-gradient(150deg, var(--accent-soft), transparent 65%), var(--panel); border: 1px solid var(--border); border-radius: var(--r-lg); padding: 14px 16px; margin: 2px 0 16px; box-shadow: var(--shadow); }
.summary h4 { margin: 0 0 4px; font-size: 13px; font-weight: 800; letter-spacing: .02em; display: flex; align-items: center; gap: 7px; }
.summary .sum-sub { font-size: 11.5px; color: var(--text-2); margin-bottom: 10px; }
.summary .sum-row { display: flex; align-items: center; gap: 10px; padding: 8px 0; border-top: 1px solid var(--border); font-size: 13px; }
.summary .sum-row:first-of-type { border-top: none; }
.sum-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); flex-shrink: 0; }
.sum-title { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sum-status { font-size: 10.5px; font-weight: 700; padding: 2px 8px; border-radius: 8px; background: var(--panel-2); border: 1px solid var(--border); text-transform: uppercase; letter-spacing: .04em; }
.sum-kb { display: flex; align-items: center; gap: 8px; margin-top: 8px; padding-top: 10px; border-top: 1px dashed var(--border); font-size: 12px; color: var(--text-2); }
.sum-load { color: var(--text-2); font-size: 12px; padding: 6px 0; }

/* ---------- composer ---------- */
.reply-bar { display: flex; align-items: center; gap: 8px; padding: 8px 14px; background: var(--panel-2); border-top: 1px solid var(--border); font-size: 12.5px; color: var(--text-2); }
.reply-bar span { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.composer { display: flex; gap: 10px; align-items: flex-end; padding: 10px 14px calc(var(--safe-b) + 10px); border-top: 1px solid var(--border); background: color-mix(in srgb, var(--bg) 78%, transparent); backdrop-filter: blur(20px) saturate(1.6); }
#input { flex: 1; background: var(--panel-2); border: 1px solid var(--border); color: var(--text); border-radius: 20px; padding: 12px 16px; font-size: 15.5px; resize: none; outline: none; max-height: 120px; line-height: 1.35; font-family: inherit; box-shadow: inset 0 1px 2px rgba(0,0,0,.03); }
#input:focus { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.send-btn { width: 44px; height: 44px; border-radius: 50%; background: linear-gradient(145deg, var(--accent), color-mix(in srgb, var(--accent) 70%, #000 8%)); color: var(--accent-ink); border: none; font-size: 16px; font-weight: 800; cursor: pointer; flex-shrink: 0; transition: transform .12s, opacity .15s; box-shadow: 0 6px 18px rgba(157,187,46,.3); }
.send-btn:active { transform: scale(.86); }
.send-btn:disabled { opacity: .35; box-shadow: none; }

/* ---------- sheets ---------- */
.sheet-mask { position: fixed; inset: 0; background: rgba(15,17,10,.42); z-index: 20; display: flex; align-items: flex-end; justify-content: center; animation: fadein .15s ease; }
@keyframes fadein { from { opacity: 0; } to { opacity: 1; } }
.sheet { width: 100%; max-width: 560px; background: var(--bg); border: 1px solid var(--border); border-radius: 28px 28px 0 0; padding: 18px 0 calc(var(--safe-b) + 18px); animation: sheetup .22s cubic-bezier(.32,.72,.33,1); box-shadow: 0 -20px 60px rgba(0,0,0,.2); }
@keyframes sheetup { from { transform: translateY(40px); opacity: .5; } to { transform: none; opacity: 1; } }
.sheet-head { display: flex; align-items: center; justify-content: space-between; padding: 0 18px 10px; }
.sheet-head h3 { margin: 0; font-size: 16px; font-weight: 800; }
.member-row { display: flex; align-items: center; gap: 12px; padding: 10px 18px; }
.member-row .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 8px color-mix(in srgb, var(--accent) 60%, transparent); }
.member-row .name { font-weight: 600; font-size: 14px; }
.member-row .role { margin-left: auto; font-size: 11px; color: var(--text-2); text-transform: capitalize; font-weight: 600; }
.member-row .role.bot { color: var(--accent); }
.sheet-foot { display: flex; gap: 10px; padding: 14px 18px 0; }
.install-hint { margin: 14px 18px 0; font-size: 12.5px; color: var(--text-2); line-height: 1.5; background: var(--panel); border: 1px solid var(--border); border-radius: var(--r-md); padding: 10px 12px; }
.btn-ghost { flex: 1; background: var(--panel); border: 1px solid var(--border); color: var(--text); border-radius: var(--r-md); padding: 12px; font-size: 14px; font-weight: 600; cursor: pointer; font-family: inherit; transition: transform .12s; }
.btn-ghost:active { transform: scale(.97); }

/* ---------- loading ---------- */
.loading { text-align: center; color: var(--text-2); padding: 40px 0; font-size: 13px; }
.spin { display: inline-block; width: 18px; height: 18px; border: 2px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: rot .8s linear infinite; vertical-align: -3px; margin-right: 8px; }
@keyframes rot { to { transform: rotate(360deg); } }