:root {
  --bg: #14161a;
  --panel: #1d2027;
  --ink: #e7e9ee;
  --muted: #8b91a0;
  --accent: #c94b4b;
  --line: #2a2e37;
  color-scheme: dark;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; background: var(--bg); color: var(--ink); }

.auth { display: flex; min-height: 100vh; align-items: center; justify-content: center; padding: 20px; }
.auth-card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 28px; max-width: 440px; width: 100%; }
.auth-card h1 { margin-top: 0; }

.muted { color: var(--muted); }
.msg { color: var(--accent); min-height: 1.2em; font-size: .9rem; }

label { display: block; margin: 12px 0; font-size: .9rem; color: var(--muted); }
input, button { font: inherit; }
input[type=email], input[type=password], input[type=text] {
  width: 100%; margin-top: 6px; padding: 10px; border-radius: 8px;
  border: 1px solid var(--line); background: #0f1114; color: var(--ink);
}
button { background: var(--accent); color: #fff; border: 0; padding: 10px 18px; border-radius: 8px; cursor: pointer; }
button.ghost { background: transparent; border: 1px solid var(--line); color: var(--muted); }

/* app */
.app { display: flex; flex-direction: column; height: 100vh; }
.topbar { display: flex; justify-content: space-between; align-items: center; padding: 10px 16px; border-bottom: 1px solid var(--line); }
.panel { max-width: 460px; margin: 40px auto; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 24px; }
.chat { display: flex; flex-direction: column; flex: 1; min-height: 0; }
.admin { border-bottom: 1px solid var(--line); padding: 12px 16px; background: #191c22; }
.admin .inline { display: flex; gap: 8px; }
.admin .inline input { flex: 1; margin: 0; }
.member { padding: 6px 0; border-bottom: 1px solid var(--line); font-size: .9rem; display: flex; gap: 10px; align-items: center; }
.member button { padding: 4px 10px; font-size: .8rem; }
.log { flex: 1; overflow-y: auto; padding: 16px; }
.msg-head { font-size: .75rem; color: var(--muted); }
.msg-body { margin: 2px 0 12px; white-space: pre-wrap; word-break: break-word; }
.msg a { color: var(--accent); display: inline-block; margin-bottom: 12px; }
.composer { display: flex; gap: 8px; padding: 12px 16px; border-top: 1px solid var(--line); }
.composer #input { flex: 1; margin: 0; }
.file-btn { margin: 0; display: flex; align-items: center; padding: 0 8px; cursor: pointer; border: 1px solid var(--line); border-radius: 8px; }