/* ---- Clean Product Theme (v2) ----
   Goal: lighter, calmer, more polished
*/

:root{
  --bg:#f6f7fb;
  --card:#ffffff;
  --ink:#0a0a0a;
  --muted:#69707d;
  --line:#e8eaf2;
  --ring:#cfd7ff;
  --brand:#2f6bff;
  --brand-quiet:#eef3ff;
  --good:#1a9e63;
  --warn:#b86a00;
  --chip:#f3f6ff;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

/* Header */
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.site-header{
  position:sticky;top:0;background:#fff;border-bottom:1px solid var(--line);z-index:10
}
.site-header .wrap{
  display:flex;align-items:center;justify-content:space-between;height:60px
}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;letter-spacing:.2px}
.brand .dot{width:8px;height:8px;border-radius:50%;background:var(--brand)}
.nav{display:flex;gap:18px}
.nav-link{color:var(--muted);text-decoration:none}
.nav-link:hover{color:var(--ink)}

/* Layout */
.grid{display:grid;grid-template-columns:1.55fr 1fr;gap:20px;margin:28px auto}
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:16px;
  padding:18px;
  box-shadow:0 10px 28px rgba(17,20,45,.05);
}
.side{align-self:start}
.side-title{margin:2px 0 10px 0}

/* Head */
.title{margin:0;font-size:22px;letter-spacing:.2px}
.counter{color:var(--muted)}
.card-head{display:flex;align-items:end;justify-content:space-between;margin-bottom:12px}

/* Editor */
textarea{
  width:100%;
  min-height:260px;
  resize:vertical;
  border:1px solid var(--line);
  border-radius:14px;
  padding:14px 16px;
  background:#fff;
  color:var(--ink);
  font-size:17px;
  line-height:1.6;
  box-shadow:0 1px 0 rgba(17,20,45,.02) inset;
  transition:border .15s, box-shadow .15s;
}
textarea:focus{
  outline:none;
  border-color:var(--ring);
  box-shadow:0 0 0 4px var(--brand-quiet);
}

/* Toolbar / buttons */
.toolbar{display:flex;justify-content:space-between;align-items:center;margin-top:12px}
.left,.right{display:flex;align-items:center;gap:8px}
.dot-sep::before{content:'·';color:var(--muted)}
.kbd{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  background:#f4f5f9;border:1px solid var(--line);
  padding:2px 6px;border-radius:6px;color:#3a3a3a;font-size:12px
}

.btn{
  border:none;border-radius:999px;
  padding:10px 16px;font-size:15px;cursor:pointer;
  transition:transform .04s ease, filter .15s ease;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{filter:brightness(.98)}
.btn-quiet{
  background:var(--brand-quiet);color:var(--brand);
  border:1px solid #dfe6ff;
}
.btn-quiet:hover{filter:brightness(.99)}

/* Hints & errors */
.hint{font-size:13px}
.hint.ok{color:var(--good)}
.hint.warn{color:var(--warn)}
.hint-lite{color:var(--muted);font-size:13px}
.error{margin-top:10px;color:#b00020}

/* Results */
.results-head{display:flex;gap:14px;align-items:center;margin-bottom:10px}
.badge{
  background:var(--brand);color:#fff;font-weight:700;
  font-size:24px;line-height:1;border-radius:12px;
  padding:10px 12px;min-width:64px;text-align:center
}
.meta{color:var(--muted);margin-top:2px}
.summary{margin:8px 0 0 0;color:#333}

.rubric{width:100%;border-collapse:collapse;margin-top:8px}
.rubric th,.rubric td{
  padding:10px 8px;border-bottom:1px solid var(--line);text-align:left
}

/* Suggestions */
.suggestions h3{margin:14px 0 8px 0}
.suggestions ul{margin:0;padding-left:18px}

/* History */
.history-empty{color:var(--muted)}
.history .hist{
  border:1px solid var(--line);border-radius:12px;padding:10px;margin-bottom:10px;background:#fff
}
.hist-top{display:flex;align-items:center;gap:8px;margin-bottom:6px}
.chip{background:var(--chip);color:var(--brand);border:1px solid #dfe8ff;border-radius:10px;padding:2px 8px;font-weight:600}
.time{color:var(--muted);font-size:13px}
.preview{color:#333;max-height:3.1em;overflow:hidden}

/* Footer */
.site-footer{border-top:1px solid var(--line);margin-top:28px;background:#fff}
.site-footer .wrap{height:60px;display:flex;align-items:center;justify-content:center;color:var(--muted)}

/* Responsive */
@media (max-width:980px){
  .grid{grid-template-columns:1fr}
}