:root{color-scheme:dark;--bg:#10162b;--panel:#182039;--line:#2a3655;--cyan:#30deef;--muted:#9baac9}
*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 5% 0%,#1c2b47,transparent 55%),radial-gradient(ellipse at 100% 90%,#271b3e,transparent 50%),var(--bg);color:#f4f7ff;font:15px/1.5 system-ui,-apple-system,Segoe UI,sans-serif;min-height:100vh;min-height:100dvh}
button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;color:inherit;background:var(--panel);border:1px solid var(--line);border-radius:13px;padding:10px 16px;cursor:pointer;touch-action:manipulation}button:hover{border-color:var(--cyan)}button:focus-visible,a:focus-visible{outline:3px solid var(--cyan);outline-offset:3px}button:disabled{opacity:.4;cursor:default}a{color:var(--cyan);text-decoration:none}
#app{width:100%;max-width:440px;margin:auto;padding:20px 24px max(18px,env(safe-area-inset-bottom));min-height:100dvh;display:flex;flex-direction:column}header{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px}.brand{display:flex;align-items:center;gap:10px;font-size:40px;font-weight:900;color:white;line-height:1}.brand>span{font-size:14px;letter-spacing:3px}.tiny{display:block;font-size:8px;font-weight:500;letter-spacing:2px;margin-top:7px;color:var(--muted)}.tools{display:flex;gap:7px}.tools button{padding:7px 10px;font-size:13px}
.intro{margin:18px 0 22px}.eyebrow{font-size:10px;font-weight:700;letter-spacing:2.3px;color:var(--cyan)}h1{font-size:clamp(32px,9vw,42px);line-height:1.14;letter-spacing:-1.4px;margin:16px 0}p{color:var(--muted)}.intro p{font-size:14px}.sample{display:flex;align-items:center;justify-content:center;gap:17px;padding:12px 0 27px}.tile{display:inline-flex;width:54px;height:54px;align-items:center;justify-content:center;border-radius:13px;color:white;font-size:27px;font-weight:800;background:#4299f0;box-shadow:inset 0 1px 0 #ffffff40,0 4px 12px #0002}.t4{background:#9362eb}.t5{background:#ed4da6}.plus{font-size:22px;color:var(--muted)}.nine{font-size:40px;font-weight:850;color:var(--cyan)}
.modes{display:grid;gap:12px}.mode{display:flex;text-align:left;justify-content:space-between;align-items:center;padding:16px 19px}.mode strong{font-size:17px}.mode small{display:block;color:var(--muted);font-size:12px;margin-top:4px}.mode>span:last-child{color:var(--cyan);font-size:23px}.primary{border-color:#30deef80;background:linear-gradient(120deg,#163445,#1a2440)}.note{font-size:11px;text-align:center;margin:23px 0}footer{margin-top:auto;padding-top:22px;text-align:center;font-size:12px}
.game-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:17px}.game-heading button{font-size:12px;padding:6px 12px}.game-heading>span{font-weight:700;font-size:13px;letter-spacing:1px}.stats{display:flex;border:1px solid var(--line);border-radius:17px;background:#141c32;padding:12px 20px;justify-content:space-around;text-align:center}.stats small{display:block;font-size:10px;letter-spacing:1px;color:var(--muted)}.stats strong{font-size:29px;line-height:1.25}.meta{display:flex;justify-content:space-between;align-items:center;font-size:11px;color:var(--muted);margin:13px 0 10px}#combo{color:#fda35a;font-weight:750}.progress{height:4px;background:#25304d;border-radius:9px;overflow:hidden}#bar{background:var(--cyan);height:100%;width:100%;transition:width .1s linear}.numbers{display:flex;gap:16px;align-items:center;padding:22px 0}.numbers>div>span{display:block;font-size:9px;letter-spacing:1.6px;color:var(--muted);margin-bottom:5px}.numbers .next .tile{width:39px;height:39px;font-size:20px;opacity:.65}.numbers p{font-size:11px;margin:0 0 0 auto;max-width:155px}
.board{display:grid;grid-template-columns:repeat(5,1fr);gap:7px;aspect-ratio:1;border:1px solid #364264;border-radius:20px;padding:10px;background:#0b1225;box-shadow:0 14px 40px #0003}.cell{border-radius:12px;background:#17233d;border:1px solid #2b3c5e;padding:0;min-width:0;aspect-ratio:1;font-size:clamp(22px,7vw,30px);font-weight:800;transition:background .1s,transform .1s}.cell.filled{box-shadow:inset 0 1px 0 #ffffff50;border-color:#ffffff30;cursor:default}.cell.preview{outline:2px solid var(--cyan);outline-offset:-2px}.cell.hinted{outline:3px solid #fff29a;outline-offset:-3px;animation:pulse 1s infinite}.cell.clearing{animation:clear .24s ease forwards}.cell.placed{animation:pop .2s ease}.bottom{display:flex;justify-content:space-between;gap:12px}.bottom button{font-size:12px;flex:1}#message{text-align:center;min-height:24px;font-size:12px;color:var(--cyan);margin:14px 0}
dialog{color:inherit;background:#182039;border:1px solid #3b4c70;border-radius:23px;padding:29px 24px;max-width:360px;width:calc(100% - 32px);max-height:90dvh;overflow:auto;box-shadow:0 30px 100px #0008}dialog::backdrop{background:#050916bb;backdrop-filter:blur(5px)}dialog h2{font-size:24px;line-height:1.25;margin:5px 28px 17px 0}dialog p{font-size:13px}.close{position:absolute;right:14px;top:12px;background:transparent;border:none;padding:0 7px;font-size:25px;color:var(--muted)}#modal-actions{display:grid;gap:10px;margin-top:24px}#modal-actions .primary{color:var(--cyan);font-weight:700}#modal-body strong{color:white}.rule-example{font-size:23px;text-align:center;color:var(--cyan);margin:19px 0}
[hidden]{display:none!important}@keyframes pop{from{transform:scale(.75)}to{transform:scale(1)}}@keyframes clear{to{opacity:0;transform:scale(.65)}}@keyframes pulse{50%{box-shadow:0 0 18px #fff29a60}}
@media(max-width:360px){#app{padding:14px 16px}.numbers{gap:12px}.numbers p{max-width:130px}.board{gap:5px}.intro{margin:8px 0 10px}.mode{padding:12px 15px}}
@media(max-height:720px){#app{padding-top:12px}header{margin-bottom:12px}.intro{margin:5px 0 10px}h1{font-size:32px;margin:10px 0}.sample{padding:4px 0 16px}.mode{padding:11px 16px}.note{margin:14px 0}.numbers{padding:13px 0}.stats{padding:8px 15px}footer{padding-top:14px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}