:root{
  --ink:#1a1d29; --muted:#6b7280; --line:#e6e8ee; --bg:#f6f7fb;
  --brand:#4f46e5; --brand-d:#3d35c9; --accent:#0ea5e9;
  --good:#16a34a; --mid:#d97706; --low:#dc2626;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);
  font:16px/1.55 system-ui,Segoe UI,Roboto,Helvetica,Arial,sans-serif}
.wrap{max-width:840px;margin:0 auto;padding:22px 18px 64px}
a{color:var(--brand)}

.brand{display:flex;align-items:center;gap:12px;margin:6px 0 22px;flex-wrap:wrap}
.logo{font-weight:800;font-size:1.3rem;letter-spacing:-.5px;color:var(--ink);text-decoration:none}
.logo span{color:var(--brand)}
.brand-sub{color:var(--muted);font-size:.9rem}

.card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px 28px;margin-bottom:18px;
  box-shadow:0 1px 3px rgba(20,30,50,.04)}
.card.center{text-align:center}
h1{margin:.1em 0 .4em;font-size:1.8rem;letter-spacing:-.5px}
h3{margin:1.1em 0 .5em}
h4{margin:1em 0 .3em}
.lead{color:var(--muted);font-size:1.06rem}
.muted{color:var(--muted)} .small{font-size:.87rem}
.warn{background:#fff7ed;border:1px solid #fed7aa;color:#9a3412;padding:10px 13px;border-radius:10px}
.err{color:var(--low);font-weight:600}
.ok{color:var(--good)} .bad{color:var(--low)}

.btn{display:inline-block;background:var(--brand);color:#fff;border:0;padding:12px 22px;border-radius:11px;
  font:inherit;font-weight:700;cursor:pointer;text-decoration:none}
.btn:hover{background:var(--brand-d)}
.btn.big{padding:14px 28px;font-size:1.05rem;margin-top:14px}

/* hero */
.hero h1{font-size:2.2rem}
.features{list-style:none;padding:0;margin:20px 0 0;display:grid;gap:8px}
.features li{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:10px 14px}

/* setup form */
.setup{display:flex;flex-direction:column;gap:8px}
.fld{display:block;font-weight:600;margin:10px 0}
.setup input[type=text],.setup textarea,.setup select{width:100%;margin-top:6px;padding:11px 12px;
  border:1px solid var(--line);border-radius:10px;font:inherit;font-weight:400;background:#fff}
fieldset{border:1px solid var(--line);border-radius:12px;margin:8px 0;padding:12px 14px}
legend{font-weight:700;padding:0 6px;color:var(--brand-d)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{position:relative;cursor:pointer}
.chip input{position:absolute;opacity:0}
.chip span{display:inline-block;padding:8px 14px;border:1px solid var(--line);border-radius:20px;background:#fff}
.chip input:checked+span{background:var(--brand);color:#fff;border-color:var(--brand)}
.personas{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px}
.persona{cursor:pointer;border:1px solid var(--line);border-radius:12px;padding:12px 14px;display:block}
.persona input{margin-right:6px}
.persona:has(input:checked){border-color:var(--brand);background:#f3f2ff;box-shadow:0 0 0 2px rgba(79,70,229,.15)}
.p-name{display:block;font-weight:700}
.p-tag{display:block;color:var(--muted);font-size:.85rem;margin-top:2px}
.optional{margin:8px 0;border:1px dashed var(--line);border-radius:12px;padding:8px 14px}
.optional summary{cursor:pointer;font-weight:600;color:var(--brand-d)}

/* room */
.room-head{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.progress{background:var(--brand);color:#fff;padding:6px 14px;border-radius:20px;font-weight:700;font-size:.9rem;white-space:nowrap}
.chat{display:flex;flex-direction:column;gap:12px;min-height:140px;max-height:460px;overflow-y:auto;
  padding:14px;background:var(--bg);border:1px solid var(--line);border-radius:12px;margin-bottom:10px}
.room-chat{max-height:540px}
.bubble{max-width:82%;padding:11px 14px;border-radius:14px;line-height:1.5;word-wrap:break-word}
.bubble.ai{align-self:flex-start;background:#fff;border:1px solid var(--line);border-bottom-left-radius:4px}
.bubble.me{align-self:flex-end;background:var(--brand);color:#fff;border-bottom-right-radius:4px}
.bubble.ai.thinking{color:var(--muted);font-style:italic}
.bubble.ai.err{background:#fdecec;border-color:#f5c2c2;color:var(--low)}
.bubble .who{display:block;font-size:.68rem;text-transform:uppercase;letter-spacing:.5px;opacity:.7;margin-bottom:3px}
.chat-input{display:flex;gap:8px;align-items:flex-end}
.chat-input textarea{flex:1;padding:11px 12px;border:1px solid var(--line);border-radius:10px;font:inherit;resize:vertical}
.chat-input .btn{margin:0}

/* report */
.score-ring{width:130px;height:130px;border-radius:50%;margin:6px auto 8px;display:flex;flex-direction:column;
  align-items:center;justify-content:center;color:#fff}
.score-ring.good{background:linear-gradient(135deg,#16a34a,#22c55e)}
.score-ring.mid{background:linear-gradient(135deg,#d97706,#f59e0b)}
.score-ring.low{background:linear-gradient(135deg,#dc2626,#ef4444)}
.score-num{font-size:2.6rem;font-weight:800;line-height:1}
.score-of{font-size:.85rem;opacity:.85}
table.trait-table{width:100%;border-collapse:collapse}
.trait-table td{padding:7px 8px}
.t-name{width:130px;font-weight:600}
.t-bar{background:var(--line);border-radius:8px;height:14px;position:relative;overflow:hidden}
.t-bar span{position:absolute;left:0;top:0;bottom:0;border-radius:8px;background:var(--brand)}
.t-bar span.good{background:var(--good)} .t-bar span.mid{background:var(--mid)} .t-bar span.low{background:var(--low)}
.t-num{width:54px;text-align:right;color:var(--muted);font-weight:600}
.ai-cols{display:flex;gap:24px;flex-wrap:wrap}
.ai-cols>div{flex:1;min-width:240px}
.ai-cols ul{margin:.3em 0;padding-left:18px}
.better{padding:12px 0;border-bottom:1px solid var(--line)}
blockquote{margin:4px 0;padding:10px 14px;border-radius:10px;border-left:3px solid var(--line)}
blockquote.orig{background:#fafafa;color:var(--muted)}
blockquote.improved{background:#f0fdf4;border-left-color:var(--good)}
.why{font-size:.92rem}
.review{padding:12px 0;border-bottom:1px solid var(--line)}
.q-prompt{font-weight:600;margin:0 0 4px}
.answer-text{margin:.2em 0}
.fb{color:var(--brand-d);font-size:.92rem}
.steps{padding-left:20px}
.steps li{margin:5px 0}

.foot{text-align:center;color:var(--muted);font-size:.82rem;margin-top:28px}