:root {
  --green: #64bc64; --green-ink: #2d7a2d; --dark: #1f281f;
  --bg: #f6f7f5; --panel: #ffffff; --ink: #1f281f; --muted: #6b746b; --line: #e3e7e1;
  --user: #e9f4e9; --warn: #9a5b00; --warn-bg: #fff6e5;
}
* { box-sizing: border-box; margin: 0; }
[hidden] { display: none !important; }
html, body { height: 100%; }
body { background: var(--bg); color: var(--ink); font: 16px/1.6 system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif; display: flex; flex-direction: column; }
header { background: var(--dark); color: #fff; padding: 12px 16px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
header .t { font-weight: 600; font-size: 16px; }
header .s { font-size: 12px; color: #b9c4b9; }
header button { background: none; border: 1px solid #4a574a; color: #dfe7df; border-radius: 8px; padding: 6px 10px; font-size: 13px; cursor: pointer; }
main { flex: 1; overflow-y: auto; padding: 16px; }
.wrap { max-width: 760px; margin: 0 auto; }

/* login */
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 20px; max-width: 420px; margin: 8vh auto 0; display: flex; flex-direction: column; gap: 12px; }
.card h1 { font-size: 20px; }
.card label { font-size: 14px; color: var(--muted); display: flex; flex-direction: column; gap: 4px; }
.card input { font-size: 16px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; }
.card .note { font-size: 13px; color: var(--muted); }
.btn { background: var(--green); color: var(--dark); border: 0; border-radius: 10px; padding: 11px 16px; font-size: 16px; font-weight: 600; cursor: pointer; }
.btn:disabled { opacity: .5; cursor: default; }
.err { color: #b42318; font-size: 14px; min-height: 1em; }

/* chat */
.notice { background: var(--warn-bg); color: var(--warn); border-radius: 10px; padding: 10px 12px; font-size: 13px; margin-bottom: 14px; }
.msg { margin: 0 0 14px; display: flex; }
.msg.user { justify-content: flex-end; }
.bubble { max-width: 92%; padding: 10px 14px; border-radius: 14px; overflow-wrap: anywhere; }
.user .bubble { background: var(--user); white-space: pre-wrap; }
.assistant .bubble { background: var(--panel); border: 1px solid var(--line); }
.bubble p { margin: 0 0 8px; } .bubble p:last-child { margin-bottom: 0; }
.bubble p.h { font-weight: 600; }
.bubble ul, .bubble ol { margin: 0 0 8px 1.3em; padding: 0; }
.bubble code { background: #f0f2ee; border-radius: 4px; padding: 1px 4px; font-size: 14px; }
.bubble a { color: var(--green-ink); }
.code { position: relative; margin: 0 0 8px; }
.code pre { background: #1f281f; color: #e8efe8; border-radius: 10px; padding: 34px 12px 12px; overflow-x: auto; font-size: 13px; line-height: 1.5; }
.code pre code { background: none; padding: 0; color: inherit; }
.code .copy { position: absolute; top: 6px; right: 6px; background: var(--green); color: var(--dark); border: 0; border-radius: 6px; padding: 3px 8px; font-size: 12px; cursor: pointer; }
.tag { display: inline-block; margin-top: 6px; font-size: 12px; color: var(--green-ink); }
.typing { color: var(--muted); font-size: 14px; }
.starters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.starters button { background: var(--panel); border: 1px solid var(--line); border-radius: 999px; padding: 6px 12px; font-size: 14px; cursor: pointer; color: var(--ink); }
footer { border-top: 1px solid var(--line); background: var(--panel); padding: 10px 16px calc(10px + env(safe-area-inset-bottom)); }
footer .wrap { display: flex; gap: 8px; align-items: flex-end; }
footer textarea { flex: 1; font: inherit; font-size: 16px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 12px; resize: none; max-height: 40vh; min-height: 46px; }
footer .hint { font-size: 12px; color: var(--muted); margin-top: 4px; }

/* admin */
.admin-bar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 14px; }
.admin-bar .stats { color: var(--muted); font-size: 14px; margin-right: auto; }
.admin-bar button.on { background: var(--dark); color: #fff; }
.admin-bar button { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 6px 10px; cursor: pointer; }
.row { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; margin-bottom: 10px; }
.row.esc { border-left: 4px solid #e0a100; }
.row .meta { font-size: 12px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.row .q { white-space: pre-wrap; margin: 6px 0; font-weight: 500; overflow-wrap: anywhere; }
.row details { font-size: 14px; }
.row details .a { white-space: pre-wrap; color: #3b443b; margin-top: 6px; overflow-wrap: anywhere; }
.badge { border-radius: 999px; padding: 1px 8px; font-size: 12px; background: #eef1ec; }
.badge.esc { background: #fff1cc; color: #7a5300; }
.badge.bad { background: #fde8e7; color: #b42318; }