:root{
  --bg:#070912;
  --bg2:#0c1120;
  --panel:#111a2e;
  --panel2:#16223c;
  --line:#1e2c48;
  --txt:#e6ecff;
  --muted:#8b98bd;
  --acc:#22d3ee;
  --acc2:#7c3aed;
  --pink:#ff2d75;
  --radius:16px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:'Segoe UI',system-ui,sans-serif;background:var(--bg);color:var(--txt);
  line-height:1.55;overflow-x:hidden;
}
.bg-grid{
  position:fixed;inset:0;z-index:-2;
  background:
    radial-gradient(900px 500px at 80% -10%, rgba(124,58,237,.25), transparent 60%),
    radial-gradient(700px 500px at 10% 110%, rgba(34,211,238,.18), transparent 60%),
    linear-gradient(var(--bg),var(--bg2));
}
.bg-grid::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(120,150,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(120,150,255,.05) 1px,transparent 1px);
  background-size:44px 44px;mask-image:radial-gradient(circle at 50% 30%,#000,transparent 85%);
}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
a{color:inherit;text-decoration:none}

.site-header{position:sticky;top:0;z-index:40;backdrop-filter:blur(12px);background:rgba(7,9,18,.6);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:12px;font-weight:800;letter-spacing:1px;font-size:18px}
.logo b{color:var(--acc)}
.logo-gem{width:20px;height:20px;background:conic-gradient(from 45deg,var(--acc),var(--acc2),var(--pink),var(--acc));transform:rotate(45deg);border-radius:5px;box-shadow:0 0 18px rgba(34,211,238,.6)}
.nav{display:flex;gap:26px}
.nav a{color:var(--muted);font-size:15px;transition:.2s}
.nav a:hover{color:var(--acc)}

.hero{padding:90px 0 60px;text-align:center}
.hero-badge{display:inline-block;padding:7px 16px;border:1px solid var(--line);border-radius:999px;color:var(--acc);font-size:13px;letter-spacing:1px;background:rgba(34,211,238,.06);margin-bottom:22px}
.hero h1{font-size:clamp(32px,6vw,58px);line-height:1.05;margin:0 0 18px;background:linear-gradient(120deg,#fff,#8fd7ff 40%,#c9a4ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{max-width:640px;margin:0 auto 30px;color:var(--muted);font-size:18px}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

.btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 26px;border-radius:12px;font-weight:700;font-size:15px;cursor:pointer;border:1px solid transparent;transition:.2s;font-family:inherit}
.btn-primary{background:linear-gradient(120deg,var(--acc),var(--acc2));color:#04121e;box-shadow:0 8px 30px rgba(34,211,238,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 40px rgba(124,58,237,.4)}
.btn-ghost{background:rgba(255,255,255,.03);border-color:var(--line);color:var(--txt)}
.btn-ghost:hover{border-color:var(--acc);color:var(--acc)}

.section{padding:70px 0}
.section-alt{background:linear-gradient(180deg,transparent,rgba(22,34,60,.4),transparent)}
.section-title{font-size:clamp(26px,4vw,38px);text-align:center;margin:0 0 10px}
.section-title.left{text-align:left}
.section-lead{text-align:center;color:var(--muted);max-width:600px;margin:0 auto 40px}
.section-lead.left{text-align:left;margin-left:0}

.level-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:20px}
.level-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px;cursor:pointer;text-align:left;color:inherit;font-family:inherit;transition:.22s;position:relative;overflow:hidden}
.level-card:hover{transform:translateY(-4px);border-color:var(--acc);box-shadow:0 16px 40px rgba(0,0,0,.5)}
.level-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.level-num{font-size:12px;letter-spacing:1px;color:var(--muted);text-transform:uppercase}
.level-diff{font-size:11px;padding:3px 10px;border-radius:999px;font-weight:700;background:rgba(34,211,238,.14);color:var(--acc)}
.diff-a,.diff-1{background:rgba(34,197,94,.16);color:#4ade80}
.diff-b,.diff-2{background:rgba(124,58,237,.18);color:#c4b5fd}
.diff-c,.diff-3{background:rgba(255,45,117,.16);color:#ff87ae}
.level-preview{aspect-ratio:1/1;background:radial-gradient(circle at 50% 40%,#0d1526,#070b16);border-radius:12px;padding:10px;border:1px solid var(--line)}
.level-preview svg{width:100%;height:100%;display:block;filter:drop-shadow(0 2px 6px rgba(0,0,0,.5))}
.level-info{display:flex;justify-content:space-between;align-items:baseline;margin:14px 0 8px}
.level-name{font-weight:700;font-size:18px}
.level-cells{font-size:12px;color:var(--muted)}
.level-bar{height:6px;border-radius:99px;background:rgba(255,255,255,.06);overflow:hidden}
.level-bar span{display:block;height:100%;background:linear-gradient(90deg,var(--acc),var(--acc2));transition:.4s}
.level-status{margin-top:8px;font-size:12px;color:var(--muted)}

.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.step{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px;position:relative}
.step-n{position:absolute;top:-16px;left:24px;width:38px;height:38px;border-radius:10px;display:grid;place-items:center;font-weight:800;background:linear-gradient(120deg,var(--acc),var(--acc2));color:#04121e}
.step h3{margin:8px 0 8px}
.step p{color:var(--muted);margin:0;font-size:15px}

.contact-wrap{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.contact-list{list-style:none;padding:0;color:var(--muted);font-size:16px;line-height:2.1}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.form{display:flex;flex-direction:column;gap:14px}
.form label{display:flex;flex-direction:column;gap:6px;font-size:14px;color:var(--muted)}
.form input,.form textarea{background:var(--bg2);border:1px solid var(--line);border-radius:10px;padding:11px 13px;color:var(--txt);font-family:inherit;font-size:15px;resize:vertical}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--acc)}
.form-ok{background:rgba(34,197,94,.14);color:#4ade80;padding:12px;border-radius:10px;font-size:14px}

.site-footer{border-top:1px solid var(--line);padding:26px 0;margin-top:40px;color:var(--muted);font-size:14px}
.footer-inner{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* ===== ИГРА ===== */
.modal{position:fixed;inset:0;z-index:100;display:none;align-items:center;justify-content:center;padding:16px;background:rgba(4,6,14,.82);backdrop-filter:blur(8px)}
.modal.open{display:flex}
.modal-box{background:var(--panel);border:1px solid var(--line);border-radius:20px;width:100%;max-width:560px;max-height:94vh;overflow:auto;padding:22px;position:relative;box-shadow:0 30px 80px rgba(0,0,0,.6)}
.game-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:16px}
.game-level{font-size:12px;color:var(--acc);letter-spacing:1px;text-transform:uppercase}
.game-header h3{margin:4px 0 0;font-size:24px}
.modal-close{background:rgba(255,255,255,.05);border:1px solid var(--line);color:var(--txt);width:36px;height:36px;border-radius:10px;cursor:pointer;font-size:16px}
.modal-close:hover{border-color:var(--pink);color:var(--pink)}
.game-stats{margin-bottom:16px}
.stat{display:flex;align-items:baseline;gap:8px;margin-bottom:8px}
.stat span{font-size:20px;font-weight:800;color:var(--acc)}
.stat small{color:var(--muted)}
.progress-line{height:8px;border-radius:99px;background:rgba(255,255,255,.06);overflow:hidden}
.progress-line span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--acc),var(--acc2));transition:.3s}

.game-board-wrap{display:grid;place-items:center;margin-bottom:18px}
.game-board{display:grid;gap:2px;background:#070b16;padding:10px;border-radius:12px;border:1px solid var(--line);box-shadow:inset 0 0 30px rgba(0,0,0,.6);width:100%;max-width:420px}
.cell{aspect-ratio:1/1;border-radius:3px;display:grid;place-items:center;font-size:9px;font-weight:700;cursor:pointer;transition:transform .08s;position:relative}
.cell.empty-space{background:transparent;cursor:default}
.cell.todo{background:#141d31;color:#5c6a8f;border:1px solid #202d49}
.cell.todo:hover{transform:scale(1.08);z-index:2}
.cell.filled{cursor:default;box-shadow:inset 0 0 4px rgba(255,255,255,.5),0 0 6px rgba(0,0,0,.4);animation:pop .18s ease}
.cell.filled::after{content:"";position:absolute;top:2px;left:2px;width:35%;height:35%;background:rgba(255,255,255,.55);border-radius:50%;filter:blur(1px)}
.cell.hintme{outline:2px solid var(--acc);outline-offset:1px;animation:blink .6s 3}
@keyframes pop{0%{transform:scale(.4)}100%{transform:scale(1)}}
@keyframes blink{50%{outline-color:var(--pink)}}

.palette{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:16px}
.swatch{width:52px;height:52px;border-radius:12px;cursor:pointer;position:relative;border:3px solid transparent;transition:.15s;display:grid;place-items:center;font-weight:800;color:rgba(0,0,0,.55);font-size:15px}
.swatch:hover{transform:translateY(-3px)}
.swatch.active{border-color:#fff;box-shadow:0 0 0 3px var(--acc),0 8px 20px rgba(0,0,0,.5)}
.swatch small{position:absolute;bottom:-16px;font-size:10px;color:var(--muted);white-space:nowrap}
.swatch.done-color{opacity:.35}

.game-actions{display:flex;gap:12px;justify-content:center;margin-top:20px}
.game-actions .btn{padding:10px 20px}

.game-win{position:absolute;inset:0;background:rgba(6,9,20,.94);border-radius:20px;display:none;align-items:center;justify-content:center;text-align:center}
.game-win.show{display:flex;animation:fade .3s}
@keyframes fade{from{opacity:0}to{opacity:1}}
.win-inner h3{font-size:28px;margin:8px 0}
.win-inner p{color:var(--muted);margin:0 0 20px}
.win-star{font-size:60px;color:var(--acc);text-shadow:0 0 30px var(--acc);animation:spin 3s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

@media(max-width:720px){
  .contact-wrap{grid-template-columns:1fr}
  .nav{display:none}
  .swatch{width:44px;height:44px}
}