/* Self-hosted latin subsets (variable fonts). font-display: optional keeps CLS at 0
   by skipping the late swap; the <link rel=preload> in the head gets them in early. */
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400 600;
  font-display: optional;
  src: url("/fonts/inter-latin.woff2") format("woff2");
}
@font-face {
  font-family: "Space Grotesk";
  font-style: normal;
  font-weight: 500 700;
  font-display: optional;
  src: url("/fonts/space-grotesk-latin.woff2") format("woff2");
}

:root {
  --paper: #e8e4d8;       /* page behind the card */
  --card: #fbf9f4;        /* app surface */
  --surface: #ffffff;     /* inner panels */
  --ink: #1b1a17;
  --muted: #6b665a;       /* warm grey, WCAG AA (>=4.5:1) on card/surface/accent-soft */
  --line: #e7e2d5;
  --accent: #ff5436;      /* vermilion, used sparingly — fills/dots/borders only */
  --accent-ink: #c83417;  /* darker vermilion for accent-colored text (AA on light) */
  --accent-soft: #ffe9e3;
  --gold: #e9b53c;
  --silver: #c2c0b6;
  --bronze: #c9854e;
  --good: #2fa56a;
  --radius: 14px;
  --shadow: 0 10px 30px -18px rgba(40, 34, 20, 0.5);
}
* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0; min-height: 100%;
  color: var(--ink); background: var(--paper);
  font-family: "Inter", ui-sans-serif, system-ui, -apple-system, sans-serif;
}
.wrap {
  max-width: 820px; margin: 26px auto; padding: 26px 22px 56px;
  background: var(--card);
  border: 1px solid var(--line); border-radius: 18px;
  box-shadow: 0 24px 60px -34px rgba(30, 24, 12, 0.55);
}

h1, h2, .big, select, button, .lb-head, .brand-sub, .rank, .pct, .ch, .charcount, .score .big {
  font-family: "Space Grotesk", "Inter", sans-serif;
}

header { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 12px; }
.logo {
  width: 42px; height: 42px; border-radius: 11px; flex: none; background: var(--ink);
  display: grid; place-items: center;
}
.logo-dot { width: 16px; height: 16px; border-radius: 50%; background: var(--accent); }
.logo.big { width: 54px; height: 54px; border-radius: 14px; margin: 0 auto 14px; }
.logo.big .logo-dot { width: 21px; height: 21px; }
h1 { font-size: 25px; margin: 0; letter-spacing: -0.02em; font-weight: 700; }
.brand-sub { font-size: 12.5px; color: var(--muted); margin-top: 2px; }
.who { font-size: 13px; color: var(--muted); }
.who b { color: var(--ink); font-weight: 600; }
.who a { color: var(--accent-ink); text-decoration: none; margin-left: 4px; font-weight: 600; }
.who a:hover { text-decoration: underline; }

.tagline { color: #5d584c; font-size: 14.5px; margin: 16px 0 20px; line-height: 1.55; max-width: 60ch; }

.boards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.board { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.board .label { font-size: 11.5px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); padding: 11px 14px; border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; }
.canvas-wrap { position: relative; aspect-ratio: 1/1; background:
  repeating-conic-gradient(#f1eee4 0% 25%, #faf8f2 0% 50%) 50% / 26px 26px; }
.board canvas { display: block; width: 100%; height: 100%; }
.ph { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; color: #b6b1a1; font-size: 13.5px; text-align: center; padding: 12px; }

.controls { margin-top: 18px; }
.puzzlepick { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 12px; font-size: 13px; color: #5d584c; }
.puzzlepick label { font-weight: 600; color: var(--ink); }
select {
  font-size: 13.5px; padding: 8px 12px; border: 1px solid #ddd7c8; background: #fff;
  border-radius: 10px; color: var(--ink); font-weight: 500; cursor: pointer;
}
select:focus { outline: 2px solid var(--accent); border-color: var(--accent); }

textarea {
  width: 100%; font-family: "Inter", sans-serif; font-size: 16px; line-height: 1.5;
  padding: 14px 16px; border: 1px solid #ddd7c8; border-radius: 12px;
  background: #fff; resize: vertical; min-height: 70px; transition: border-color .15s, box-shadow .15s;
}
textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px rgba(255,84,54,0.13); }
textarea:disabled { background: #f4f1e9; color: #6f6a5c; }

.row { display: flex; gap: 12px; align-items: center; margin-top: 12px; flex-wrap: wrap; }
button {
  font-size: 15px; font-weight: 600; padding: 11px 22px; border: 1px solid var(--line); cursor: pointer;
  border-radius: 11px; background: #fff; color: var(--ink); transition: transform .08s, background .15s, border-color .15s;
}
button:hover { background: #f4f1e9; }
button:active { transform: translateY(1px); }
button.primary { background: var(--ink); color: #fff; border-color: var(--ink); }
button.primary:hover { background: #000; }
button.primary:disabled { background: #cbc6b8; border-color: #cbc6b8; color: #fff; cursor: default; transform: none; }
.charcount { font-size: 13px; color: var(--muted); margin-left: auto; }
.charcount b { color: var(--ink); }

.result { margin-top: 22px; min-height: 10px; }
.score { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.score .big { font-size: 56px; font-weight: 700; letter-spacing: -0.03em; line-height: 1; color: var(--ink); }
.score .meta { font-size: 14.5px; color: #5d584c; }
.score .meta b { color: var(--ink); }
.squares { display: inline-flex; gap: 6px; margin-left: auto; }
.squares i { width: 22px; height: 22px; border-radius: 5px; background: #e7e2d5; display: inline-block; }
.squares i.on { background: var(--good); animation: pop .35s ease both; }
.squares i:nth-child(2).on { animation-delay: .06s; }
.squares i:nth-child(3).on { animation-delay: .12s; }
.squares i:nth-child(4).on { animation-delay: .18s; }
.squares i:nth-child(5).on { animation-delay: .24s; }
@keyframes pop { 0% { transform: scale(0); } 70% { transform: scale(1.18); } 100% { transform: scale(1); } }
.share { background: #f3f0e7; padding: 12px 14px; border-radius: 10px; font-family: ui-monospace, Menlo, monospace; font-size: 13px; white-space: pre; margin-top: 14px; display: inline-block; color: #45402f; }
.err { color: #c0392b; font-size: 14px; font-weight: 500; }
#shareBtn { display: inline-flex; align-items: center; gap: 8px; margin-top: 14px; }
#shareBtn::before { content: "↗"; font-weight: 700; }

.spinner { display: inline-block; width: 15px; height: 15px; border: 2px solid #e3ddcd; border-top-color: var(--ink); border-radius: 50%; animation: spin .7s linear infinite; vertical-align: -2px; margin-right: 4px; }
@keyframes spin { to { transform: rotate(360deg); } }

.practice { font-size: 12px; font-weight: 600; color: #946a1e; background: #fbeecb; border: 1px solid #efdca0; padding: 4px 10px; border-radius: 20px; }
.practice-note { margin-top: 10px; font-size: 13.5px; color: #786530; background: #fbf2d8; border: 1px solid #eedfac; border-radius: 11px; padding: 11px 14px; }

.lb-title { margin-top: 28px; font-size: 17px; font-weight: 700; letter-spacing: -0.01em; }
.lb-title .sub { font-weight: 500; color: var(--muted); font-size: 13.5px; }
.lb-grid { margin-top: 12px; }
.leaderboard { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.lb-head { font-size: 13px; font-weight: 600; padding: 12px 15px; border-bottom: 1px solid var(--line); display: flex; align-items: center; gap: 8px; }
.lb-head .sub { font-weight: 500; color: var(--muted); }
.lb-icon { width: 22px; height: 22px; border-radius: 6px; display: grid; place-items: center; font-size: 13px; color: #fff; background: var(--ink); }
.lb-list { list-style: none; margin: 0; padding: 6px; }
.lb-list li { display: flex; align-items: center; gap: 10px; padding: 9px 10px; font-size: 14px; border-radius: 9px; }
.lb-list .rank { width: 24px; height: 24px; flex: none; display: grid; place-items: center; font-size: 12px; font-weight: 700; color: var(--muted); background: #f0ece0; border-radius: 7px; }
.lb-list li.rank-1 .rank { background: var(--gold); color: #5a4500; }
.lb-list li.rank-2 .rank { background: var(--silver); color: #3a3a30; }
.lb-list li.rank-3 .rank { background: var(--bronze); color: #3f2510; }
.lb-list .nick { flex: 1; font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lb-list .pct { font-weight: 700; }
.lb-list .ch { color: var(--muted); width: 60px; text-align: right; font-weight: 500; }
.lb-list li.me { background: var(--accent-soft); box-shadow: inset 0 0 0 1px rgba(255,84,54,0.3); }
.lb-list li.me .nick::after { content: "you"; font-family: "Inter"; font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: #fff; background: var(--accent-ink); padding: 2px 6px; border-radius: 20px; margin-left: 8px; }
.lb-empty { color: var(--muted); justify-content: center; font-size: 13.5px; }

.hint { font-size: 13px; color: var(--muted); line-height: 1.55; margin-top: 22px; }

.modal { position: fixed; inset: 0; display: none; align-items: center; justify-content: center; background: rgba(27,26,23,0.5); backdrop-filter: blur(3px); padding: 20px; }
.modal.show { display: flex; }
.card { background: var(--card); padding: 28px 26px; border-radius: 18px; max-width: 360px; width: 100%; text-align: center; box-shadow: 0 30px 70px -22px rgba(20,16,6,0.5); animation: rise .25s ease both; }
@keyframes rise { from { opacity: 0; transform: translateY(12px) scale(0.98); } to { opacity: 1; transform: none; } }
.card h2 { margin: 0 0 6px; font-size: 22px; letter-spacing: -0.02em; }
.card p { margin: 0 0 16px; color: #6f6a5c; font-size: 14px; }
.card input { width: 100%; font-family: "Inter"; font-size: 16px; padding: 12px 14px; border: 1px solid #ddd7c8; border-radius: 11px; margin-bottom: 14px; text-align: center; }
.card input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px rgba(255,84,54,0.13); }
.card input:focus::placeholder { color: transparent; }
.card button { width: 100%; }
.nick-err { color: #c0392b; font-size: 13px; margin: -4px 0 12px; }

@media (max-width: 600px) {
  .boards { grid-template-columns: 1fr; }
  .wrap { margin: 10px; padding: 22px 16px 44px; }
  .score .big { font-size: 46px; }
}