:root{--bg-0: #0f1226;--bg-1: #171a3c;--bg-2: #232760;--panel: rgba(255, 255, 255, .06);--panel-strong: rgba(255, 255, 255, .1);--text: #f8f9ff;--text-dim: rgba(248, 249, 255, .68);--text-muted: rgba(248, 249, 255, .48);--accent: #7ee3ff;--accent-strong: #4bd1ff;--success: #6ee7b7;--danger: #ff7a90;--warning: #ffd166;--border: rgba(255, 255, 255, .14);--border-strong: rgba(255, 255, 255, .28);--shadow-lg: 0 24px 60px rgba(0, 0, 0, .45);--radius-md: 14px;--radius-lg: 22px;--tap-target: 44px;--board-max: 480px;--safe-bottom: env(safe-area-inset-bottom, 0px);--safe-top: env(safe-area-inset-top, 0px)}*{box-sizing:border-box}html,body{height:100%}body{margin:0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:radial-gradient(120% 90% at 20% 0%,#1e2262 0%,transparent 60%),radial-gradient(120% 80% at 80% 100%,#2b1150 0%,transparent 60%),linear-gradient(180deg,#0b0e1f,#060819);color:var(--text);min-height:100dvh;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overscroll-behavior:none}button{font:inherit;color:inherit;cursor:pointer}#root{min-height:100dvh}.app-shell{min-height:100dvh;padding:calc(12px + var(--safe-top)) 14px calc(14px + var(--safe-bottom));max-width:640px;margin:0 auto;display:flex;flex-direction:column;gap:16px}.app-shell--loading{align-items:center;justify-content:center}.loading{color:var(--text-dim);font-size:16px}.app-header{display:flex;flex-direction:column;gap:12px}.app-header__title h1{margin:0;font-size:clamp(22px,6vw,28px);letter-spacing:-.02em}.app-header__tag{margin:2px 0 0;color:var(--text-dim);font-size:14px;line-height:1.35}.header-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.header-stats__cell{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius-md);padding:10px 12px;display:flex;flex-direction:column;gap:2px}.header-stats__label{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted)}.header-stats__value{font-size:16px;font-weight:600;font-variant-numeric:tabular-nums}.app-main{display:flex;flex-direction:column;gap:12px;align-items:stretch}.board-frame{display:flex;flex-direction:column;align-items:center;gap:10px}.board{display:grid;grid-template-columns:repeat(var(--board-size),minmax(0,1fr));grid-template-rows:repeat(var(--board-size),minmax(0,1fr));gap:0;background:#00000059;padding:6px;border-radius:20px;border:1px solid var(--border-strong);box-shadow:var(--shadow-lg);touch-action:manipulation;user-select:none;width:min(100%,var(--board-max));aspect-ratio:1}.cell{position:relative;min-width:0;min-height:0;width:100%;height:100%;border:none;padding:0;margin:0;background:color-mix(in srgb,var(--region-color) 65%,transparent);color:#14162b;font-size:clamp(12px,3vw,28px);line-height:1;display:flex;align-items:center;justify-content:center;border-top:1px solid rgba(0,0,0,.35);border-left:1px solid rgba(0,0,0,.35);transition:transform 90ms ease-out,background .12s ease-out,box-shadow .12s ease-out}.cell:last-child{border-right:1px solid rgba(0,0,0,.35)}.cell.cell--edge-right{border-right:1px solid rgba(0,0,0,.35)}.cell.cell--edge-bottom{border-bottom:1px solid rgba(0,0,0,.35)}.cell.cell--edge-top{border-top:2px solid rgba(0,0,0,.75)}.cell.cell--edge-left{border-left:2px solid rgba(0,0,0,.75)}.cell.cell--edge-right{border-right:2px solid rgba(0,0,0,.75)}.cell.cell--edge-bottom{border-bottom:2px solid rgba(0,0,0,.75)}.cell:active{transform:scale(.94)}.cell:focus-visible{outline:3px solid var(--accent);outline-offset:-3px;z-index:2}.cell--queen{background:color-mix(in srgb,var(--region-color) 85%,#ffffff 10%)}.cell__glyph{color:#0b0d1a;text-shadow:0 1px 0 rgba(255,255,255,.65),0 3px 8px rgba(0,0,0,.35);font-weight:700;font-size:calc(var(--cell-size) * .72)}.cell__mark{width:44%;height:44%;position:relative;opacity:.65}.cell__mark:before,.cell__mark:after{content:"";position:absolute;inset:42% 0;background:#0b0d1a;border-radius:3px;height:4px}.cell__mark:before{transform:rotate(45deg)}.cell__mark:after{transform:rotate(-45deg)}.cell--violating{box-shadow:inset 0 0 0 3px var(--danger);animation:cellShake .26s ease-out}.cell--hint{box-shadow:inset 0 0 0 3px var(--accent),0 0 20px 4px #7ee3ff8c;animation:hintPulse 1.4s ease-in-out infinite}@keyframes hintPulse{0%,to{box-shadow:inset 0 0 0 3px var(--accent),0 0 12px 2px #7ee3ff73}50%{box-shadow:inset 0 0 0 3px var(--accent),0 0 26px 6px #7ee3ffd9}}@keyframes cellShake{0%{transform:translate(0)}25%{transform:translate(-2px)}50%{transform:translate(2px)}75%{transform:translate(-1px)}to{transform:translate(0)}}.board-summary{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;padding:0 4px}.summary-chip{display:flex;align-items:center;gap:8px;background:var(--panel);border:1px solid var(--border);border-radius:999px;padding:6px 12px;font-size:13px}.summary-chip__label{font-weight:500;color:var(--text-dim)}.summary-chip__value{font-variant-numeric:tabular-nums;font-weight:600}.summary-chip--complete{border-color:#6ee7b780;color:var(--success)}.summary-chip--violated{border-color:#ff7a9080;color:var(--danger)}.summary-chip__badge{background:#ff7a9029;color:var(--danger);padding:2px 8px;border-radius:999px;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.06em}.board-summary__hint{flex-basis:100%;text-align:center;color:var(--text-muted);font-size:12px;margin-top:2px}.action-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;padding:8px;background:var(--panel);border:1px solid var(--border);border-radius:var(--radius-lg)}.action-bar__btn{display:flex;flex-direction:column;align-items:center;gap:2px;min-height:var(--tap-target);padding:8px 4px;background:transparent;border:none;border-radius:14px;color:var(--text);font-size:12px;font-weight:500;transition:background .12s ease-out,transform 90ms ease-out}.action-bar__btn:hover,.action-bar__btn:focus-visible{background:var(--panel-strong)}.action-bar__btn:active{transform:scale(.96)}.action-bar__btn:disabled{color:var(--text-muted);opacity:.55;cursor:not-allowed}.action-bar__icon{font-size:20px}.action-bar__label{letter-spacing:.03em}.flash{background:#ffd16624;border:1px solid rgba(255,209,102,.4);color:#ffe4a3;border-radius:12px;padding:10px 14px;font-size:14px;text-align:center;margin:4px auto 0;max-width:480px}.rules{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden}.rules__toggle{width:100%;display:flex;align-items:center;justify-content:space-between;padding:14px 16px;min-height:var(--tap-target);background:transparent;border:none;font-size:15px;font-weight:600;color:var(--text)}.rules__body{padding:0 16px 14px;color:var(--text-dim);font-size:14px;line-height:1.5}.rules__body ol{padding-left:20px;margin:4px 0 12px;display:flex;flex-direction:column;gap:6px}.rules__footer{margin:0;color:var(--text-muted);font-size:12px}.sheet-backdrop{position:fixed;inset:0;background:#040614b3;display:flex;align-items:flex-end;justify-content:center;z-index:40;padding:0;animation:fadeIn .18s ease-out}.sheet{width:100%;max-width:560px;background:linear-gradient(180deg,#1a1e46,#0e112c);border-top-left-radius:22px;border-top-right-radius:22px;border:1px solid var(--border);border-bottom:none;padding:18px 18px calc(24px + var(--safe-bottom));display:flex;flex-direction:column;gap:12px;animation:sheetIn .22s cubic-bezier(.22,1,.36,1);max-height:90dvh;overflow-y:auto}@keyframes sheetIn{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.sheet__header{display:flex;align-items:center;justify-content:space-between}.sheet__header h2{margin:0;font-size:18px}.sheet__close{min-width:var(--tap-target);min-height:var(--tap-target);border:none;background:transparent;color:var(--text-dim);font-size:20px;border-radius:12px}.sheet__intro{margin:0;color:var(--text-dim);font-size:14px}.sheet__field{display:flex;flex-direction:column;gap:6px}.sheet__field label{font-size:13px;font-weight:600;color:var(--text)}.sheet__field input{min-height:var(--tap-target);padding:10px 14px;border-radius:12px;border:1px solid var(--border);background:#00000059;color:var(--text);font-size:16px;font-variant-numeric:tabular-nums}.sheet__field input:focus-visible{outline:2px solid var(--accent);outline-offset:1px}.sheet__error{margin:0;color:var(--danger);font-size:13px}.stepper{display:inline-flex;align-items:center;gap:.8rem;margin-top:.45rem}.stepper__button{width:2.4rem;height:2.4rem;border:1px solid var(--line);border-radius:.7rem;background:var(--surface-strong);color:var(--ink);font-size:1.35rem;line-height:1;cursor:pointer}.stepper__button:disabled{opacity:.4;cursor:not-allowed}.stepper__value{min-width:2rem;text-align:center;font-size:1.2rem;font-weight:800}.sheet__hint{margin:0;color:var(--text-muted);font-size:12px}.preset-row{display:grid;grid-template-columns:repeat(2,1fr);gap:6px}.preset{min-height:var(--tap-target);border-radius:12px;border:1px solid var(--border);background:#ffffff0a;color:var(--text);padding:8px;font-size:13px;font-weight:500}.preset--active{border-color:var(--accent);background:#7ee3ff24;color:var(--accent)}.sheet__actions{display:flex;gap:10px;justify-content:flex-end;margin-top:6px}.btn{min-height:var(--tap-target);padding:0 16px;border-radius:12px;font-weight:600;border:1px solid transparent;transition:transform 90ms ease-out,background .12s ease-out}.btn:active{transform:scale(.97)}.btn--primary{background:linear-gradient(180deg,var(--accent) 0%,var(--accent-strong) 100%);color:#06172a}.btn--primary:disabled{background:#7ee3ff40;color:#06172a80;cursor:not-allowed}.btn--ghost{background:transparent;border-color:var(--border);color:var(--text)}.btn--ghost:hover{background:var(--panel-strong)}.modal-backdrop{position:fixed;inset:0;background:#040614bf;display:flex;align-items:center;justify-content:center;z-index:60;padding:20px;animation:fadeIn .18s ease-out}.modal{position:relative;background:linear-gradient(180deg,#1e224f,#101331);border:1px solid var(--border-strong);border-radius:22px;padding:26px 22px;width:100%;max-width:380px;box-shadow:var(--shadow-lg);text-align:center;overflow:hidden;animation:sheetIn .26s cubic-bezier(.22,1,.36,1)}.modal h2{margin:0 0 6px;font-size:24px}.modal__subtitle{margin:0 0 18px;color:var(--text-dim);font-size:14px}.modal__stats{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:0 0 20px}.modal__stats>div{background:var(--panel);border-radius:14px;padding:12px}.modal__stats dt{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted);margin-bottom:4px}.modal__stats dd{margin:0;font-size:22px;font-weight:700;font-variant-numeric:tabular-nums}.modal__actions{display:flex;gap:10px;justify-content:center}.confetti{position:absolute;inset:0;pointer-events:none;overflow:hidden}.confetti span{--i: 0;position:absolute;top:-12px;left:calc((var(--i) * 4.3%) % 100%);width:8px;height:14px;background:hsl(calc(var(--i) * 24deg + 180deg),80%,65%);border-radius:2px;animation:confettiFall 1.8s ease-in forwards,confettiTwist 1.2s linear infinite;animation-delay:calc(var(--i) * 40ms),0s;transform-origin:center}@keyframes confettiFall{0%{transform:translateY(-40px) rotate(0);opacity:0}15%{opacity:1}to{transform:translateY(360px) rotate(560deg);opacity:0}}@keyframes confettiTwist{0%{rotate:0deg}to{rotate:360deg}}@media (min-width: 640px){.app-shell{padding:32px 24px;gap:22px}.app-header{flex-direction:row;justify-content:space-between;align-items:flex-end;gap:24px}.header-stats{grid-template-columns:repeat(3,minmax(90px,1fr))}.board{--cell-size: min( calc((var(--board-max)) / var(--board-size)), calc((100dvh - 260px) / var(--board-size)) )}.action-bar{grid-template-columns:repeat(4,minmax(90px,1fr))}}@media (prefers-reduced-motion: reduce){*{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}