:root{
  --bg:#0f1220;
  --panel:#171b2e;
  --panel-2:#202640;
  --text:#f8f6ef;
  --muted:#a8aec5;
  --lime:#c9ff4f;
  --purple:#8e6cff;
  --red:#ff6b74;
  --line:rgba(255,255,255,.09);
  --shadow:0 24px 70px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif;background:
radial-gradient(circle at 15% 15%,rgba(142,108,255,.17),transparent 30%),
radial-gradient(circle at 85% 85%,rgba(201,255,79,.1),transparent 26%),var(--bg);color:var(--text)}
button{font:inherit}
.game-shell{min-height:100vh;padding:18px}
.game-header{max-width:980px;margin:0 auto 18px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;font-weight:950;letter-spacing:1.8px}
.brand-mark{width:36px;height:36px;border-radius:12px;background:var(--lime);color:#12151d;display:grid;place-items:center;transform:rotate(-7deg)}
.icon-btn{width:42px;height:42px;border-radius:13px;border:1px solid var(--line);background:var(--panel);color:var(--text);cursor:pointer}
.game-panel{max-width:980px;margin:0 auto;background:rgba(23,27,46,.92);border:1px solid var(--line);border-radius:28px;padding:28px;box-shadow:var(--shadow);backdrop-filter:blur(16px)}
.top-row{display:grid;grid-template-columns:120px 1fr 120px;gap:24px;align-items:center}
.title-wrap{text-align:center}
.eyebrow{font-size:11px;letter-spacing:2px;font-weight:900;color:var(--lime)}
h1{font-size:clamp(34px,5vw,58px);letter-spacing:-2.5px;margin:8px 0 6px}
.title-wrap p{margin:0;color:var(--muted)}
.stat{background:var(--panel-2);border:1px solid var(--line);border-radius:20px;padding:18px;text-align:center}
.stat span{display:block;color:var(--muted);font-size:11px;letter-spacing:1.6px;font-weight:850}
.stat strong{font-size:30px;display:block;margin-top:4px}
.progress-wrap{height:9px;background:var(--panel-2);border-radius:99px;overflow:hidden;margin:28px 0 18px}
.progress-bar{height:100%;width:100%;background:linear-gradient(90deg,var(--lime),var(--purple));transition:width .3s linear}
.message{text-align:center;color:var(--muted);min-height:24px}
.word-preview{min-height:68px;margin:12px auto 20px;display:flex;align-items:center;justify-content:center;font-size:clamp(30px,6vw,52px);font-weight:950;letter-spacing:8px;color:var(--lime);text-transform:uppercase}
.letter-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:14px;max-width:820px;margin:0 auto}
.letter-btn{aspect-ratio:1;border:1px solid var(--line);border-radius:20px;background:linear-gradient(145deg,#2a3150,#1d2239);color:var(--text);font-size:clamp(24px,4vw,39px);font-weight:950;cursor:pointer;box-shadow:inset 0 -8px 14px rgba(0,0,0,.18),0 10px 20px rgba(0,0,0,.14);transition:.18s}
.letter-btn:hover{transform:translateY(-3px)}
.letter-btn.selected{background:var(--lime);color:#12151d;transform:translateY(-5px) scale(1.03)}
.letter-btn:disabled{opacity:.34;cursor:not-allowed}
.actions{display:flex;justify-content:center;gap:12px;margin:24px 0}
.primary-btn,.secondary-btn{border:0;border-radius:15px;padding:14px 22px;font-weight:900;cursor:pointer}
.primary-btn{background:var(--lime);color:#10131a}
.secondary-btn{background:var(--panel-2);color:var(--text);border:1px solid var(--line)}
.full{width:100%}
.found-box{margin-top:8px;background:var(--panel-2);border:1px solid var(--line);border-radius:22px;padding:20px}
.found-heading{display:flex;justify-content:space-between;align-items:center}
.found-heading h2{font-size:18px;margin:0}
.found-heading span{color:var(--muted);font-weight:800}
.found-words{display:flex;flex-wrap:wrap;gap:9px;margin-top:15px;min-height:36px}
.word-chip{background:rgba(201,255,79,.12);border:1px solid rgba(201,255,79,.25);color:var(--lime);padding:8px 11px;border-radius:999px;font-size:13px;font-weight:850;text-transform:uppercase}
.modal{position:fixed;inset:0;display:none;place-items:center;padding:20px;background:rgba(7,9,16,.78);backdrop-filter:blur(14px);z-index:50}
.modal.open{display:grid}
.modal-card{width:min(460px,100%);background:var(--panel);border:1px solid var(--line);border-radius:28px;padding:34px;text-align:center;box-shadow:var(--shadow)}
.modal-icon{font-size:50px;margin-bottom:10px}
.modal-card h2{font-size:38px;letter-spacing:-1.5px;margin:10px 0}
.modal-card p{color:var(--muted);line-height:1.6}
.modal-card ul{text-align:left;color:var(--muted);line-height:1.7;padding-left:22px}
.final-score{font-size:72px;font-weight:950;color:var(--lime);line-height:1;margin:16px 0}
.success{color:var(--lime)!important}
.error{color:var(--red)!important}
@media(max-width:760px){
  .game-shell{padding:10px 10px calc(18px + env(safe-area-inset-bottom))}
  .game-header{margin-bottom:10px}
  .game-panel{padding:18px 14px;border-radius:22px}
  .top-row{grid-template-columns:1fr 1fr;gap:10px}
  .title-wrap{grid-column:1/-1;grid-row:1}
  .stat{padding:12px}
  .stat strong{font-size:25px}
  .letter-grid{grid-template-columns:repeat(4,1fr);gap:10px}
  .letter-btn{border-radius:16px}
  .word-preview{letter-spacing:5px;min-height:58px}
  .actions{flex-direction:column}
  .primary-btn,.secondary-btn{width:100%;min-height:50px}
}
@media(max-width:390px){
  .letter-grid{gap:8px}
  .game-panel{padding-left:10px;padding-right:10px}
}

.back-link{
  color:var(--muted);
  text-decoration:none;
  font-size:13px;
  font-weight:800;
  padding:9px 12px;
  border:1px solid var(--line);
  border-radius:12px;
  background:var(--panel);
}
.back-link:hover{color:var(--text)}
.game-header{gap:12px}
@media(max-width:600px){
  .game-header{flex-wrap:wrap}
  .back-link{order:3;width:100%;text-align:center}
}