:root {
  --bg: #10141a; --bg2: #171d26; --bg3: #1f2733;
  --fg: #dfe6ee; --muted: #8b98a8; --line: #2a3442;
  --acc: #4f8cff; --acc2: #3568c4; --danger: #d8605c; --ok: #57b077;
  font-size: 15px;
}
* { box-sizing: border-box; }
/* The hidden attribute must always win: several elements below set display:flex
   with ID specificity, which would otherwise override [hidden] and leave hidden
   views/panels (auth vs main, composer, chat header) permanently visible. */
[hidden] { display: none !important; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg); color: var(--fg);
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
button, input {
  font: inherit; color: inherit; background: var(--bg3);
  border: 1px solid var(--line); border-radius: 6px; padding: 8px 12px;
}
input:focus, button:focus { outline: 1px solid var(--acc); }
button { cursor: pointer; }
button.primary { background: var(--acc); border-color: var(--acc); color: #fff; }
button.primary:hover { background: var(--acc2); }
button.ghost { background: transparent; }
button.ghost:hover { background: var(--bg3); }
label { cursor: pointer; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
.spacer { flex: 1; }
.row { display: flex; gap: 8px; margin-top: 12px; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

#toast {
  position: fixed; top: 16px; left: 50%; transform: translateX(-50%);
  background: var(--bg3); border: 1px solid var(--line); border-radius: 8px;
  padding: 10px 18px; z-index: 100; max-width: 80vw;
}
#toast.error { border-color: var(--danger); color: var(--danger); }

/* auth */
#view-auth { display: flex; align-items: center; justify-content: center; height: 100vh; }
.auth-card { width: 360px; background: var(--bg2); border: 1px solid var(--line);
  border-radius: 12px; padding: 28px; }
.auth-card h1 { margin: 0 0 4px; font-size: 1.4rem; }
.tabs { display: flex; gap: 6px; margin: 18px 0; }
.tab { flex: 1; background: transparent; border-color: var(--line); }
.tab.active { background: var(--bg3); border-color: var(--acc); }
.field { margin-bottom: 12px; display: flex; flex-direction: column; gap: 4px; }
.field label { font-size: 0.85rem; color: var(--muted); }
.field input { width: 100%; }
#auth-submit { width: 100%; margin-top: 6px; }

/* main layout */
#view-main { display: flex; height: 100vh; }
#sidebar { width: 300px; border-right: 1px solid var(--line); display: flex;
  flex-direction: column; background: var(--bg2); }
#sidebar > header { display: flex; align-items: center; gap: 6px; padding: 12px;
  border-bottom: 1px solid var(--line); }
.me-name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; }
.newchat { display: flex; gap: 6px; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.newchat input { flex: 1; min-width: 0; }
#conv-list { flex: 1; overflow-y: auto; }
.conv-item { padding: 12px 14px; border-bottom: 1px solid var(--line); cursor: pointer; }
.conv-item:hover { background: var(--bg3); }
.conv-item.active { background: var(--bg3); border-left: 3px solid var(--acc); }
.conv-item .cname { font-weight: 600; }
.conv-item .cmeta { font-size: 0.78rem; color: var(--muted); }
.badge { display: inline-block; padding: 1px 7px; border-radius: 9px; font-size: 0.72rem; }
.badge.ok { background: #1d3325; color: var(--ok); }
.badge.warn { background: #37241f; color: var(--danger); }

#chatpane { flex: 1; display: flex; flex-direction: column; min-width: 0; }
#chat-header { display: flex; align-items: center; gap: 10px; padding: 12px 16px;
  border-bottom: 1px solid var(--line); background: var(--bg2); }
#chat-title { font-weight: 600; }
#msg-list { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 8px; }
.empty { flex: 1; display: flex; align-items: center; justify-content: center; color: var(--muted); }
.msg { max-width: 65%; padding: 8px 12px; border-radius: 10px; background: var(--bg3);
  align-self: flex-start; overflow-wrap: break-word; }
.msg.mine { align-self: flex-end; background: #24406b; }
.msg .mname { font-size: 0.72rem; color: var(--muted); margin-bottom: 2px; }
.msg .mtime { font-size: 0.68rem; color: var(--muted); text-align: right; margin-top: 3px; }
.msg.sysbad { border: 1px solid var(--danger); color: var(--danger); }
.msg img.thumb { max-width: 260px; max-height: 200px; border-radius: 6px; display: block; cursor: pointer; }
#composer { display: flex; gap: 8px; padding: 12px 16px; border-top: 1px solid var(--line);
  background: var(--bg2); align-items: center; }
#composer #msg-input { flex: 1; min-width: 0; }
#btn-photo { border: 1px solid var(--line); border-radius: 6px; padding: 8px 12px; }
#btn-photo:hover { background: var(--bg3); }

/* admin */
#view-admin { padding: 0 24px 40px; max-width: 1100px; margin: 0 auto; }
.admin-header { display: flex; align-items: center; padding: 16px 0; }
.cards { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 20px; }
.card { background: var(--bg2); border: 1px solid var(--line); border-radius: 10px;
  padding: 14px 20px; min-width: 130px; }
.card .cv { font-size: 1.5rem; font-weight: 700; }
.card .ck { font-size: 0.78rem; color: var(--muted); }
.tablewrap { overflow-x: auto; margin-bottom: 24px; }
table { border-collapse: collapse; width: 100%; font-size: 0.85rem; }
th, td { text-align: left; padding: 7px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { color: var(--muted); font-weight: 600; }
td.uidcell { font-family: ui-monospace, Menlo, monospace; font-size: 0.75rem; }
td button { padding: 3px 10px; font-size: 0.8rem; margin-right: 4px; }

/* modals */
dialog { background: var(--bg2); color: var(--fg); border: 1px solid var(--line);
  border-radius: 12px; padding: 24px; max-width: 480px; }
dialog::backdrop { background: rgba(0,0,0,0.6); }
.reckey, .fp { display: block; background: var(--bg); border: 1px solid var(--line);
  border-radius: 8px; padding: 12px; margin: 10px 0; word-break: break-all;
  font-size: 0.9rem; letter-spacing: 0.03em; }
#modal-photo img { max-width: 80vw; max-height: 75vh; display: block; margin-bottom: 12px; }