:root{--bg:#ffffff;--panel:#f6f8fb;--panel-2:#e9eef5;--ink:#0f1320;--muted:#6c7686;--line:#d9e2ef;--brand:#0aa770;--brand-2:#33c3ff;--radius-lg:18px;--radius-sm:12px;--radius-xs:8px;--card-shadow:0 24px 60px rgba(15,19,32,.07);--strong-card-shadow:0 32px 72px rgba(15,19,32,.12);--t1:#eef7ff;--t2:#dff3ff;--t3:#c8f7ec;--t4:#bfffe0;--t5:#fff1c2;--t6:#ffdca8;--t7:#ffc0c0;--t8:#ffb0e6;--t9:#d6c4ff;--t10:#c5c5c5;--tile-ink:#0f1320;--overlay-bg:rgba(15,19,32,.55);--overlay-card-bg:#ffffffee}*{box-sizing:border-box;-webkit-tap-highlight-color:#fff0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Inter",Roboto,"Helvetica Neue",Arial,sans-serif}html,body{margin:0;height:100%;background:var(--bg);color:var(--ink)}body{display:flex;flex-direction:column;min-height:100vh;padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);background:radial-gradient(circle at 20% 20%,rgb(51 195 255 / .06) 0%,#fff0 60%),radial-gradient(circle at 80% 30%,rgb(10 167 112 / .06) 0%,#fff0 60%),var(--bg)}.header-brand{flex-shrink:0;padding:16px clamp(16px,2vw,24px) 12px;position:relative;z-index:5;display:flex;align-items:center;justify-content:center;text-align:center}.header-brand a{text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;font-size:.9rem;line-height:1.2;color:var(--ink)}.header-chip{background:#fff;color:var(--ink);font-size:.7rem;font-weight:600;line-height:1;padding:8px 12px;border-radius:999px;box-shadow:0 24px 60px rgb(15 19 32 / .15);border:1px solid var(--line);background-image:radial-gradient(circle at 0% 0%,rgb(51 195 255 / .18) 0%,#fff0 60%),radial-gradient(circle at 100% 100%,rgb(10 167 112 / .18) 0%,#fff0 60%)}.menu-bar{flex-shrink:0;padding:12px clamp(16px,2vw,24px);display:flex;flex-wrap:wrap;align-items:flex-start;justify-content:space-between;row-gap:12px;column-gap:16px;background:var(--panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line);box-shadow:0 24px 60px rgb(15 19 32 / .07)}.hud-left{display:flex;flex-wrap:wrap;align-items:flex-start;gap:16px}.stats-row{display:flex;flex-wrap:wrap;align-items:flex-start;gap:12px 16px}.stat-card{min-width:80px;background:#fff;border-radius:var(--radius-sm);box-shadow:0 20px 40px rgb(15 19 32 / .08);padding:10px 12px;border:1px solid var(--line)}.stat-label{font-size:.6rem;font-weight:500;color:var(--muted);line-height:1.2}.stat-value{font-size:1rem;font-weight:600;color:var(--ink);line-height:1.3;display:flex;align-items:baseline;gap:4px}.next-goal-card{background:#fff;border-radius:var(--radius-sm);border:1px solid var(--line);box-shadow:0 20px 40px rgb(15 19 32 / .08);padding:10px 12px;min-width:200px;max-width:260px;font-size:.7rem;line-height:1.4;color:var(--ink);font-weight:500;display:flex;flex-direction:column;justify-content:center}.next-goal-main{font-size:.7rem;font-weight:600;color:var(--ink);line-height:1.3;display:flex;flex-wrap:wrap;gap:4px}.next-goal-sub{font-size:.65rem;font-weight:500;color:var(--muted);line-height:1.3;display:flex;flex-wrap:wrap;gap:4px}.next-goal-strong{font-weight:600;color:var(--ink)}.next-goal-emph{background:linear-gradient(90deg,var(--brand) 0%,var(--brand-2) 100%);-webkit-background-clip:text;color:#fff0;font-weight:600}.menu-buttons{display:flex;flex-wrap:wrap;align-items:flex-start;gap:12px;min-width:max-content}.btn-chip{appearance:none;border:0;background:#fff;border-radius:var(--radius-sm);border:1px solid var(--line);box-shadow:0 20px 40px rgb(15 19 32 / .08);padding:10px 14px;font-size:.8rem;font-weight:600;color:var(--ink);cursor:pointer;line-height:1.2}.btn-chip:active{transform:scale(.98)}.main-wrap{flex:1;min-height:0;display:flex;flex-direction:column;padding:16px clamp(16px,2vw,24px) 24px;gap:16px}@media(min-width:900px){.main-wrap{flex-direction:row;align-items:flex-start;justify-content:center;gap:24px}}.board-area{flex:1 1 auto;min-width:260px;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;gap:16px;max-width:500px;margin:0 auto;position:relative}.hint-card{width:100%;background:#fff;color:var(--ink);border-radius:var(--radius-lg);border:1px solid var(--line);box-shadow:var(--card-shadow);padding:14px 16px;font-size:.7rem;line-height:1.4;position:relative;font-weight:500;color:var(--muted)}.hint-head{display:none}.badge-mini{display:none}#statusLine{display:none}.pulse{animation:pulse 1.5s infinite}@keyframes pulse{0%{text-shadow:0 0 0 #fff0}50%{text-shadow:0 0 12px rgb(51 195 255 / .6)}100%{text-shadow:0 0 0 #fff0}}.grid-shell{background:#fff;border-radius:var(--radius-lg);padding:16px;box-shadow:var(--strong-card-shadow);border:1px solid var(--line);touch-action:none;position:relative;user-select:none}.grid{position:relative;display:grid;grid-template-columns:repeat(4,1fr);grid-template-rows:repeat(4,1fr);gap:12px;width:min(90vw,400px);height:min(90vw,400px);max-width:420px;max-height:420px;min-width:280px;min-height:280px}@media(min-width:1100px){.grid{max-width:460px;max-height:460px;width:460px;height:460px}}.grid-bg-cell{background:var(--panel);border-radius:var(--radius-sm);border:1px solid var(--line);box-shadow:inset 0 2px 4px rgb(0 0 0 / .03)}.tile{position:absolute;border-radius:var(--radius-sm);border:1px solid rgb(0 0 0 / .06);box-shadow:0 28px 72px rgb(15 19 32 / .16),0 2px 4px rgb(15 19 32 / .06);display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;font-weight:600;color:var(--tile-ink);line-height:1.2;padding:6px 4px;transition:transform .12s cubic-bezier(.2,.8,.4,1),scale .12s cubic-bezier(.2,.8,.4,1),background .12s,box-shadow .12s;will-change:transform;position:absolute}.tile-main{font-size:clamp(.9rem,1.2vw,1rem);font-weight:600;color:#0f1320}.tile-sub{font-size:clamp(.6rem,.9vw,.7rem);font-weight:500;color:rgb(15 19 32 / .7)}.tile.merging{scale:1.15}.tile.spawn{animation:pop .16s cubic-bezier(.2,.8,.4,1)}@keyframes pop{0%{scale:.4;opacity:0}100%{scale:1;opacity:1}}.game-over-overlay{position:absolute;inset:0;background:var(--overlay-bg);display:none;align-items:center;justify-content:center;border-radius:var(--radius-lg);z-index:10}.game-over-card{background:var(--overlay-card-bg);border-radius:var(--radius-lg);border:1px solid var(--line);box-shadow:0 32px 80px rgb(0 0 0 / .4);padding:24px 20px 20px;text-align:center;max-width:240px;display:flex;flex-direction:column;gap:12px}.go-title{font-size:.95rem;font-weight:600;color:var(--ink);line-height:1.3}.go-sub{font-size:.75rem;line-height:1.4;color:var(--muted);min-height:2.5em}.play-again-btn{appearance:none;border:0;border-radius:var(--radius-sm);background:linear-gradient(90deg,var(--brand) 0%,var(--brand-2) 100%);color:#fff;font-size:.8rem;font-weight:600;line-height:1.2;padding:10px 12px;box-shadow:0 16px 40px rgb(0 0 0 / .25);cursor:pointer}.play-again-btn:active{transform:scale(.98)}.side-panel{flex:0 0 260px;max-width:320px;background:#fff;border-radius:var(--radius-lg);border:1px solid var(--line);box-shadow:var(--card-shadow);padding:16px;display:flex;flex-direction:column;gap:16px;font-size:.8rem;line-height:1.4;color:var(--ink);position:relative}@media(max-width:899px){.side-panel{display:none}}.side-panel .tip{font-size:.7rem;line-height:1.4;color:var(--muted)}.unit-list{background:#fff;border-radius:var(--radius-xs);border:1px solid var(--line);box-shadow:inset 0 0 0 999px rgb(255 255 255 / .35),0 16px 32px rgb(15 19 32 / .07);padding:12px;font-size:.75rem;line-height:1.4;color:var(--ink)}.unit-row{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:baseline;border-bottom:1px solid var(--line);padding:6px 0}.unit-row:last-child{border-bottom:0}.unit-left{font-weight:600;min-width:80px;color:var(--ink)}.unit-right{color:var(--muted);font-weight:500;font-size:.7rem}.drawer-overlay{position:fixed;inset:0;background:rgb(0 0 0 / .4);display:none;align-items:flex-end;justify-content:center;z-index:999}.drawer{background:#fff;color:var(--ink);width:100%;max-width:480px;border-radius:20px 20px 0 0;border:1px solid var(--line);box-shadow:0 -24px 60px rgb(0 0 0 / .3);padding:20px 16px 32px;max-height:80vh;overflow:auto;position:relative}.drawer-close{display:inline-block;background:var(--panel);border:1px solid var(--line);border-radius:999px;font-size:.8rem;line-height:1;font-weight:600;color:var(--ink);padding:8px 12px;box-shadow:0 20px 40px rgb(15 19 32 / .08);cursor:pointer;margin-bottom:16px}.drawer-title{font-size:.8rem;font-weight:600;color:var(--ink);margin-bottom:8px;line-height:1.3}.drawer p{font-size:.75rem;line-height:1.4;color:var(--ink);margin:0 0 12px}.drawer .unit-list{box-shadow:inset 0 0 0 999px rgb(255 255 255 / .35),0 16px 32px rgb(15 19 32 / .07)}@media(min-width:500px){.stat-value{font-size:1.05rem}}