@font-face{
  font-family:"Nunito";
  src:url("../fonts/nunito.woff2") format("woff2");
  font-weight:400 1000;
  font-style:normal;
  font-display:swap;
}
:root{
  --ground:#f3ecdd;
  --ground2:#efe6d2;
  --paper:#fffdf8;
  --ink:#26221a;
  --muted:#6f6759;
  --line:#e2d7c2;
  --navy:#1d3a5f;
  --navy2:#16304f;
  --cream:#fdf8ec;
  --green:#2f6b4f;
  --red:#a63a2e;
  --radius:18px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ground);
  color:var(--ink);
  font-family:"Nunito",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:17px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--navy)}
button{font-family:inherit;cursor:pointer;color:inherit;-webkit-appearance:none;appearance:none}
.phrase{white-space:nowrap}
button:disabled{opacity:.45;cursor:default}
/* Header: white bar, skeleton only */
.site-header{
  background:#fff;
  border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:20;
}
.header-inner{
  max-width:1060px;margin:0 auto;padding:14px 20px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.brand{font-weight:900;font-size:24px;letter-spacing:-.01em;text-decoration:none;color:var(--ink)}
.brand span{color:var(--navy)}
.nav{display:flex;gap:8px;flex-wrap:wrap}
.nav button{
  border:1px solid var(--line);background:#fff;border-radius:999px;
  padding:8px 16px;font-weight:800;font-size:15px;color:var(--ink);
}
.nav button[aria-pressed="true"]{background:var(--navy);color:#fff;border-color:var(--navy)}
.streak-pill{
  border:1px solid var(--line);background:var(--cream);border-radius:999px;
  padding:7px 13px;font-weight:800;font-size:14px;white-space:nowrap;
}
/* Layout: narrow centred board; below-board sections readable, no empty columns */
.wrap{max-width:1060px;margin:0 auto;padding:28px 20px 48px}
.game-wrap{max-width:680px;margin:0 auto}
.hero{text-align:center;margin:6px 0 20px}
.hero h1{font-size:clamp(30px,5vw,44px);line-height:1.05;margin:0 0 8px;font-weight:900;letter-spacing:-.02em}
.hero p{margin:0 auto;max-width:820px;color:var(--muted);font-size:17px}
@media (min-width:900px){
  .hero h1{white-space:nowrap;font-size:44px}
}
.meta-line{font-weight:800;font-size:15px;margin:14px 0 0}
.meta-line span{color:var(--muted);font-weight:700}
.card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 22px;margin:0 0 18px;
}
.card h2{margin:0 0 8px;font-size:22px;font-weight:900}
.card h3{margin:18px 0 6px;font-size:17px;font-weight:900}
.card p{margin:6px 0;color:#4a4438}
.card ul{margin:8px 0;padding-left:22px;color:#4a4438}
/* Solved groups: single dark-blue treatment for every group */
.solved{margin-bottom:14px;display:grid;gap:10px}
.solved-group{
  background:var(--navy);color:#fff;border-radius:14px;padding:13px 16px;text-align:center;
}
.solved-group.lost{background:#5d6d80}
.solved-group strong{display:block;font-size:16px;font-weight:900;letter-spacing:.01em}
.solved-group span{font-size:14px;opacity:.92;word-spacing:.35em}
/* Board */
.board{
  display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:14px;
}
.tile{
  min-width:0;
  color:var(--ink);
  background:var(--cream);
  border:1.5px solid #ddd2ba;
  border-radius:12px;
  padding:14px 6px;
  min-height:76px;
  display:flex;align-items:center;justify-content:center;text-align:center;
  font-weight:800;line-height:1.15;
  overflow-wrap:anywhere;word-break:break-word;
  font-size:15px;
}
.tile.selected{background:var(--navy);color:#fff;border-color:var(--navy)}
.tile.used{visibility:hidden}
/* Word-length-based scaling: longer tiles get smaller type and tighter padding.
   This is the mobile long-word rule; JS also sets data-len so the class is data-driven. */
.tile[data-len="9"],.tile[data-len="10"]{font-size:14px}
.tile[data-len="11"],.tile[data-len="12"]{font-size:13px;padding-left:4px;padding-right:4px}
.tile[data-len="13"]{font-size:12px;padding-left:3px;padding-right:3px;letter-spacing:-.01em}
.tile[data-len="14"]{font-size:11.5px;padding-left:3px;padding-right:3px;letter-spacing:-.015em}
.tile[data-len="15"]{font-size:11px;padding-left:2px;padding-right:2px;letter-spacing:-.02em}
.controls{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;align-items:center;margin:4px 0 12px}
.controls button{
  border-radius:999px;border:1px solid var(--ink);background:#fff;
  padding:11px 20px;font-weight:800;font-size:15px;
}
.controls button.primary{background:var(--ink);color:#fff}
.mistakes{display:flex;align-items:center;gap:8px;justify-content:center;font-weight:800;font-size:15px;margin:10px 0}
#mistakeDots{display:inline-flex;gap:8px;align-items:center}
.dot{display:inline-block;flex:none;width:14px;height:14px;border-radius:50%;background:#e6dcc4;border:2px solid #a89a7d}
.dot.used{background:var(--red);border-color:var(--red)}
.message{min-height:26px;text-align:center;font-weight:800;margin:6px 0}
.message.error{color:var(--red)}
.message.ok{color:var(--green)}
.hint-box{
  background:var(--cream);border:1px dashed #cbbd9d;border-radius:12px;
  padding:12px 14px;font-size:15px;text-align:center;
}
.hint-box:empty{display:none}
.hint-row{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-top:10px}
.hint-row button{border-radius:999px;border:1px solid var(--line);background:#fff;padding:8px 14px;font-weight:800;font-size:14px}
/* Below-board: two readable columns on desktop, stacked on mobile */
.below{display:grid;grid-template-columns:1fr 1fr;gap:18px;max-width:1060px;margin:22px auto 0}
.below .card{margin:0}
.archive-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:14px}
.archive-card{
  text-align:left;color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:14px;
  padding:12px 14px;font-size:14px;line-height:1.4;
}
.archive-card strong{display:block;font-size:15px}
.archive-card .st{font-weight:800}
.archive-card .st.solved{color:var(--green);background:none}
.archive-card .st.played{color:#8a6a1f;background:none}
.archive-card .st.new{color:var(--muted);background:none}
/* Share modal */
.modal-backdrop{
  position:fixed;inset:0;background:rgba(30,25,15,.55);
  display:flex;align-items:flex-end;justify-content:center;padding:16px;z-index:50;
}
.modal{
  background:#fff;border-radius:20px;max-width:520px;width:100%;padding:24px;
  box-shadow:0 20px 60px rgba(0,0,0,.25);
}
.modal h2{margin:0 0 6px;font-size:24px;font-weight:900}
.modal p{color:var(--muted);margin:6px 0}
.share-preview{
  background:var(--ground);border:1px solid var(--line);border-radius:12px;
  padding:16px;font-family:ui-monospace,Menlo,monospace;font-size:15px;line-height:1.6;
  white-space:pre-wrap;margin:14px 0;
}
.modal-actions{display:flex;gap:10px;flex-wrap:wrap}
.modal-actions button{border-radius:999px;padding:11px 18px;font-weight:800;border:1px solid var(--ink);background:#fff}
.modal-actions button.primary{background:var(--navy);color:#fff;border-color:var(--navy)}
.stats-section{max-width:1060px;margin:22px auto 0}
.stats-card{margin:0}
.stats-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:12px;margin:14px 0;text-align:center}
.stat strong{display:block;font-size:26px;font-weight:900}
.stat span{font-size:13px;color:var(--muted);font-weight:800}
.stats-empty{text-align:center;padding:18px 0 6px}
.stats-empty p{font-size:17px;font-weight:800;color:var(--ink);margin:0 0 14px}
.stats-empty button{border-radius:999px;padding:12px 22px;font-weight:800;font-size:15px;background:var(--ink);color:#fff;border:1px solid var(--ink)}
#shareStatsBtn{border-radius:999px;border:1px solid var(--ink);background:#fff;padding:10px 18px;font-weight:800;font-size:14px}
.site-footer{border-top:1px solid var(--line);padding:26px 20px;text-align:center;color:var(--muted);font-size:14px}
.site-footer a{color:var(--muted)}
.hidden{display:none !important}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
/* Mobile: board in first screen, controls thumb-reachable directly under it.
   Header is 2 rows, not 3: brand + streak on row 1, mode pills on row 2. */
@media (max-width:640px){
  body{font-size:16px}
  .header-inner{padding:8px 12px;flex-wrap:wrap;gap:8px}
  .brand{font-size:20px;order:1}
  .streak-pill{font-size:12px;padding:5px 9px;order:2;margin-left:auto}
  .nav{order:3;width:100%}
  .nav button{padding:6px 11px;font-size:13px}
  .wrap{padding:12px 14px 36px}
  .hero{margin:0 0 10px}
  .hero h1{font-size:24px;line-height:1.2;text-wrap:balance}
  .hero p{font-size:14px}
  .meta-line{margin:8px 0 0}
  .below{grid-template-columns:1fr}
  .stats-section{margin-top:16px}
  .stats-grid{grid-template-columns:repeat(3,1fr)}
  .archive-grid{grid-template-columns:1fr 1fr}
  .board{gap:6px;margin-bottom:10px}
  .tile{min-height:62px;padding:10px 4px;font-size:13.5px}
  .tile[data-len="9"],.tile[data-len="10"]{font-size:12.5px}
  .tile[data-len="11"],.tile[data-len="12"]{font-size:11.5px;padding-left:3px;padding-right:3px}
  .tile[data-len="13"]{font-size:10.5px;padding-left:2px;padding-right:2px}
  .tile[data-len="14"]{font-size:10px;padding-left:2px;padding-right:2px}
  .tile[data-len="15"]{font-size:9.5px;padding-left:2px;padding-right:2px;letter-spacing:-.02em}
  .controls button{padding:11px 16px}
  .card{padding:18px 16px}
  .modal-backdrop{align-items:flex-end;padding:0}
  .modal{border-radius:20px 20px 0 0;max-height:88vh;overflow:auto}
}
@media (max-width:390px){
  /* At a true 390px viewport the 15-letter tiles step down one more notch.
     Firefox's minimum window is wider, so this band is verified by the
     500px test plus the overflow script, not by a 390px screenshot. */
  .tile[data-len="14"]{font-size:9px}
  .tile[data-len="15"]{font-size:8.5px}
}