:root{--bg: #0e1116;--panel: #171c26;--panel-2: #212940;--text: #e8ecf4;--muted: #93a0b4;--accent: #38bdf8;--accent-ink: #06283a;--board: #1c3468;--hole: #0c1017;--red: #f4576b;--yellow: #fbbf24;color-scheme:dark}*{box-sizing:border-box}html,body,#app{height:100%}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;-webkit-tap-highlight-color:transparent;overflow:hidden}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.game{height:100%;max-width:640px;margin-inline:auto;padding:max(12px,env(safe-area-inset-top)) max(12px,env(safe-area-inset-right)) max(12px,env(safe-area-inset-bottom)) max(12px,env(safe-area-inset-left));display:flex;flex-direction:column;gap:10px;-webkit-touch-callout:none;-webkit-user-select:none;user-select:none}.panel{display:flex;flex-direction:column;gap:8px}.hud{display:grid;grid-template-columns:1fr auto;align-items:center;gap:8px}.chips{grid-column:1;grid-row:1;display:flex;gap:6px;min-width:0}.chip{display:inline-flex;align-items:center;gap:6px;min-height:38px;padding-inline:10px;border-radius:10px;background:var(--panel);font-size:15px;font-weight:700;font-variant-numeric:tabular-nums}.chip-icon{display:inline-flex;flex:none}.chip-icon.is-red,.status-icon.is-red{color:var(--red)}.chip-icon.is-yellow,.status-icon.is-yellow{color:var(--yellow)}#chip-d .icon,.status-icon.is-draw{color:var(--muted)}.icon{display:block;width:18px;height:18px;flex:none}.chip .icon{width:17px;height:17px}.btn .icon{width:20px;height:20px}.actions{grid-column:2;grid-row:1;display:flex;gap:6px;justify-self:end}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;min-width:44px;padding-inline:14px;border:0;border-radius:10px;background:var(--panel-2);color:var(--text);font:inherit;font-weight:600;cursor:pointer}.btn:active{transform:translateY(1px)}.btn-label{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.btn-primary{background:var(--accent);color:var(--accent-ink)}.btn-plain{padding-inline:0;background:var(--panel);color:var(--muted)}.switch{grid-column:1 / -1;display:flex;gap:6px}.switch[hidden]{display:none}#modes{grid-row:2}#levels{grid-row:3}.seg{flex:1;min-height:40px;padding-inline:6px;border:0;border-radius:10px;background:var(--panel);color:var(--muted);font:inherit;font-size:14px;font-weight:600;cursor:pointer;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.seg.is-on{background:var(--panel-2);color:var(--text);box-shadow:inset 0 0 0 1.5px #38bdf88c}.status{display:flex;align-items:center;justify-content:center;gap:8px;margin:0;min-height:24px;font-size:15px;font-weight:700}.status-icon{display:inline-flex;flex:none}.status-icon .icon{width:20px;height:20px}.status.is-over{font-size:17px}.board-wrap{flex:1;min-height:0;min-width:0;display:flex;align-items:center;justify-content:center}.board{position:relative;border-radius:calc(var(--cell, 48px) * .26);background:var(--hole);box-shadow:0 10px 26px #00000073,inset 0 0 0 1px #ffffff0d;overflow:hidden;touch-action:none}.cols{position:absolute;inset:0;z-index:1;display:grid;grid-template-columns:repeat(7,1fr)}.col{display:flex;flex-direction:column;padding:0;border:0;background:none;font:inherit;color:inherit;cursor:pointer;touch-action:none;-webkit-tap-highlight-color:transparent}.col.is-full{cursor:default}.board.is-thinking .col:not(.is-full){cursor:progress}.board.is-won .col,.board.is-won .col.is-full{cursor:pointer}.slot{position:relative;flex:1;min-height:0}.slot:before{content:"";position:absolute;inset:12%;border-radius:50%;background:radial-gradient(circle at 50% 32%,#141a24,var(--hole) 72%);box-shadow:inset 0 2px 5px #000000a6}.col:not(.is-full):active .slot:before{background:radial-gradient(circle at 50% 32%,#1d2634,#12181f 72%)}.disc{position:absolute;inset:12%;border-radius:50%;background:radial-gradient(circle at 34% 26%,#ffffff80,#fff0 55%),radial-gradient(circle at 50% 55%,var(--disc-face),var(--disc-edge) 78%);box-shadow:inset 0 0 0 max(1px,calc(var(--cell, 48px) * .03)) var(--disc-edge);animation:fall calc(.15s + var(--drop, 1) * 42ms) cubic-bezier(.5,0,.9,.34) backwards}.disc-red{--disc-face: var(--red);--disc-edge: #a51d33}.disc-yellow{--disc-face: var(--yellow);--disc-edge: #a86408}@keyframes fall{0%{transform:translateY(calc(var(--drop, 1) * var(--cell, 48px) * -1))}76%{transform:translateY(0);animation-timing-function:cubic-bezier(.33,0,.4,1)}88%{transform:translateY(calc(var(--cell, 48px) * -.1))}to{transform:translateY(0)}}.disc.is-ghost{opacity:0;animation:none;transition:opacity .14s ease}@media(hover:hover){.col:hover .disc.is-ghost{opacity:.32}}.slot.is-win .disc{filter:drop-shadow(0 0 calc(var(--cell, 48px) * .16) var(--disc-face));z-index:1}.board.is-won .slot:not(.is-win) .disc{opacity:.42;transition:opacity .3s ease}.face{position:absolute;inset:0;z-index:2;width:100%;height:100%;pointer-events:none}.lines{position:absolute;inset:0;z-index:3;width:100%;height:100%;pointer-events:none;overflow:visible}.win-line{stroke:var(--red);stroke-width:.1;stroke-linecap:round;stroke-dasharray:var(--len, 4);stroke-dashoffset:var(--len, 4);opacity:0}.win-line.is-yellow{stroke:var(--yellow)}.board.is-won .win-line{opacity:1;animation:draw-win .34s ease-out .16s forwards}@keyframes draw-win{to{stroke-dashoffset:0}}.hint{margin:0;text-align:center;color:var(--muted);font-size:13px;line-height:1.45}@media(max-width:470px){.btn-label{display:none}#again-btn{padding-inline:0}.game{padding-left:max(8px,env(safe-area-inset-left));padding-right:max(8px,env(safe-area-inset-right))}}@media(max-height:470px){.game{padding:max(8px,env(safe-area-inset-top)) max(8px,env(safe-area-inset-right)) max(8px,env(safe-area-inset-bottom)) max(8px,env(safe-area-inset-left));gap:6px}.panel{gap:6px}.chip{min-height:32px;padding-inline:8px;font-size:14px}.seg{min-height:32px;font-size:13px}.status{min-height:20px;font-size:14px}.status.is-over{font-size:15px}.hint{font-size:12px}}@media(max-height:330px){.game,.panel{gap:4px}.chip,.seg{min-height:30px}.status{min-height:18px;font-size:13px}.hint{display:none}}@media(max-width:260px){.seg{padding-inline:3px;font-size:12px}}@media(max-height:470px)and (min-aspect-ratio:13 / 10){.game{flex-direction:row;align-items:stretch;gap:10px;max-width:none}.panel{flex:0 0 auto;width:min(42vw,240px);justify-content:center;min-height:0;overflow-y:auto}.hud{display:flex;flex-direction:column;align-items:stretch;gap:6px}.chips{justify-content:space-between}.chip{flex:1;justify-content:center;padding-inline:6px}.actions{justify-self:auto}#again-btn{flex:1}.hint{display:none}}@media(prefers-reduced-motion:reduce){.disc{animation-duration:1ms}.board.is-won .win-line{animation-duration:1ms;animation-delay:0ms}}