/* Root DESIGN.md approved k-heritage brand constants. */
:root{--paper:#F9F8F2;--giwa:#1D1D1F;--ink:#0A0A0A;--pine:#1A472A;--blue:#2B4B63;--red:#A2231D;--wood:#B38B6D;color-scheme:dark;color:var(--paper);background:var(--ink);font:14px/1.5 'Gowun Dodum','Apple SD Gothic Neo',system-ui,sans-serif;font-variant-numeric:tabular-nums}*{box-sizing:border-box}body{margin:0}main{max-width:1480px;margin:auto;padding:12px}button{font:inherit;color:var(--paper);background:var(--giwa);border:1px solid var(--wood);border-radius:4px;min-height:44px;min-width:44px;padding:8px 12px;cursor:pointer}button:hover{background:color-mix(in srgb,var(--wood) 22%,var(--giwa))}button:disabled{opacity:.45;cursor:not-allowed}button:focus-visible{outline:3px solid var(--paper);outline-offset:2px}.primary{background:var(--red)}button[aria-pressed=true],button[aria-selected=true]{box-shadow:inset 0 -3px var(--wood)}h1,h2{font-family:'Nanum Myeongjo',Georgia,serif}h1{font-size:26px;margin:0}h1 small{font:12px system-ui;color:var(--wood);margin-left:8px}h2{font-size:22px;margin:0}header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-bottom:8px;border-bottom:1px solid var(--wood)}nav{display:flex;gap:8px;flex-wrap:wrap}#title,#result{padding:80px 24px;text-align:center;min-height:560px;background:linear-gradient(transparent,color-mix(in srgb,var(--giwa) 80%,transparent)),url('assets/battlefield.png') center/cover}#title h2{font-size:40px}#title p{font-size:18px}#title button{min-width:240px}.status{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:8px 0}.status strong{font-size:20px}#phase{text-align:center}.grain{display:flex;align-items:baseline;gap:8px}.grain strong{font-size:26px}.grain small{font-size:11px;color:var(--wood)}.arenas{display:grid;grid-template-columns:3fr 2fr;gap:12px;--scene-size:min(calc(100svh - 365px),calc((min(100vw,1480px) - 36px)*.6))}figure{margin:0;width:var(--scene-size);justify-self:center;position:relative}.arenas figure:nth-child(2){width:calc(var(--scene-size)*.667)}figcaption{padding:4px 0;font-size:12px;color:var(--wood)}figcaption span{color:var(--paper)}canvas{width:100%;display:block;aspect-ratio:1;touch-action:none}.commands{display:flex;align-items:center;gap:12px;padding:8px 0}.shop{flex:1;min-width:0}.tabbar{display:flex;gap:8px;align-items:center;margin-bottom:6px}.tabbar [role=tablist]{display:flex;gap:8px}.tabbar #placement-help{margin-left:auto}.tabbar #remove{font-size:12px}#tower-buttons{display:grid;grid-template-columns:repeat(6,1fr);gap:6px}#tower-buttons button{display:grid;grid-template-columns:40px 1fr;align-items:center;padding:4px 8px;text-align:left;touch-action:none}#tower-buttons canvas{width:40px;height:40px;grid-row:span 2}#tower-buttons small{font-size:11px;color:var(--wood)}#tower-buttons span{font-size:14px}#selection{margin:6px 0 0;min-height:22px;font-size:13px}#cart{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.cart-row{border:1px solid var(--wood);padding:6px 8px;display:grid;grid-template-columns:1fr 44px 32px 44px;align-items:center;gap:4px}.cart-row .stats{grid-column:1/-1;font-size:11px;color:var(--wood)}.cart-row strong{text-align:center}#confirm{min-width:120px;min-height:60px}#notice{margin:0;min-height:22px;color:var(--wood);font-size:12px}dialog{max-width:560px;color:var(--paper);background:var(--giwa);border:1px solid var(--wood);padding:24px}dialog::backdrop{background:color-mix(in srgb,var(--ink) 85%,transparent)}#placement-dialog{width:min(340px,calc(100vw - 24px));padding:20px}#placement-action{font-size:13px;min-height:40px}#cells{width:220px;height:220px;margin:12px auto;display:grid;grid-template-columns:repeat(5,44px);grid-template-rows:repeat(5,44px)}#cells button{width:44px;height:44px;padding:0;font-size:12px}#cells button[aria-pressed=true]{background:var(--blue)}.pad-actions{display:flex;justify-content:space-between;gap:8px}#drag-ghost{position:fixed;left:0;top:0;width:84px;pointer-events:none;z-index:30;padding:4px;background:color-mix(in srgb,var(--giwa) 80%,transparent);border:1px solid var(--wood);transform:translate(-50%,-70%)}#drag-ghost canvas{width:60px;height:60px;margin:auto}#drag-ghost span{display:block;text-align:center;font-size:11px}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);margin:0;top:0;left:0}@media(max-width:1100px){#tower-buttons button{grid-template-columns:1fr;justify-items:center;text-align:center}#tower-buttons canvas{grid-row:auto;width:32px;height:32px}.arenas{--scene-size:min(calc(100svh - 345px),calc((100vw - 36px)*.6))}.cart-row{grid-template-columns:1fr 44px 28px 44px;padding:4px}.grain small{display:none}}@media(max-width:800px){main{padding:12px}header{display:block}nav{margin-top:8px}h1{font-size:24px}.status{flex-wrap:wrap;gap:4px}.status strong{font-size:14px}.status #phase{font-size:13px}.grain strong{font-size:20px}.arenas{grid-template-columns:1fr;--scene-size:min(100%,500px)}figure{width:100%}.arenas figure:nth-child(2){width:66.7%;justify-self:center}.commands{flex-wrap:wrap}.shop{flex-basis:100%}#tower-buttons{grid-template-columns:repeat(3,1fr)}#tower-buttons button{grid-template-columns:40px 1fr;justify-items:start;text-align:left}#tower-buttons canvas{grid-row:span 2;width:40px;height:40px}#confirm{width:100%}#cart{grid-template-columns:1fr 1fr}.cart-row{grid-template-columns:1fr 44px 24px 44px}.tabbar #remove{max-width:120px}#title{padding:48px 12px}#title h2{font-size:32px}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
@media(max-width:800px){.cart-row{grid-template-columns:44px 1fr 44px}.cart-row>span{grid-column:1/-1}}

#tower-buttons button.unavailable{opacity:.6}
/* R3 single top-right start control and high-contrast brand-red seconds. */
#play{position:relative}.status{padding-right:245px;min-height:94px}.launch-control{position:absolute;top:8px;right:0;display:flex;align-items:center;gap:12px}#prepare-timer{background:var(--red);border:1px solid var(--wood);color:var(--paper);padding:4px 12px;display:flex;align-items:baseline;gap:4px}#seconds{font-size:42px;line-height:1.2;font-weight:700}#prepare-timer.inactive{opacity:.55}#confirm{width:auto;min-width:112px;min-height:56px}.arenas{--scene-size:min(calc(100svh - 400px),calc((min(100vw,1480px) - 36px)*.6))}#tower-tooltip{position:fixed;z-index:35;max-width:min(360px,calc(100vw - 16px));background:var(--giwa);border:1px solid var(--wood);padding:12px;color:var(--paper);box-shadow:0 4px 12px color-mix(in srgb,var(--ink) 60%,transparent);font-size:13px;pointer-events:none}#selection{min-height:42px}#drag-ghost{z-index:30}@media(max-width:1100px){.status{padding-right:230px;gap:8px}.status strong{font-size:14px}.grain{gap:4px}.arenas{--scene-size:min(calc(100svh - 410px),calc((100vw - 36px)*.6))}}@media(max-width:800px){.status{padding-right:0;padding-top:82px;min-height:0}.launch-control{top:8px}.arenas{--scene-size:min(100%,500px)}.status #phase{font-size:13px}#confirm{width:auto}#selection{min-height:64px}}
@media(min-width:1101px){.arenas{--scene-size:min(calc(100svh - 430px),calc((min(100vw,1480px) - 36px)*.6))}}
/* User requested red NUMERALS; approved paper supplies contrasting light surface. */
#prepare-timer{background:var(--paper);color:var(--red);border:2px solid var(--red)}
.growth-actions{display:flex;gap:8px;align-items:center}.growth-actions small{font-size:11px;line-height:1.3}#wave{font-size:11px;margin:4px 0;color:var(--blue)}.attack-info{border:0;background:none;text-align:left;font-size:12px;padding:2px;min-width:0}#cart{grid-template-columns:repeat(7,minmax(0,1fr))}.cart-row .stats{font-size:10px}.cart-row{grid-template-columns:minmax(0,1fr) 44px 18px 44px}.cart-row .attack-info{grid-column:1/-1}.cart-row [data-minus]{grid-column:2}.growth-actions:has(button:not([hidden])){min-height:44px}@media(max-width:800px){#cart{grid-template-columns:repeat(2,minmax(0,1fr))}.growth-actions{flex-wrap:wrap}.growth-actions small{flex-basis:100%}#wave{line-height:1.4}}@media(min-width:801px){.arenas{--scene-size:min(calc(100dvh - 490px),calc((100vw - 90px)*.6))}}
#wave{color:var(--wood)}.cart-row{grid-template-columns:44px minmax(20px,1fr) 44px}.cart-row [data-minus]{grid-column:1}#cart{grid-template-columns:repeat(7,minmax(140px,1fr));overflow-x:auto}@media(max-width:800px){#cart{grid-template-columns:repeat(2,minmax(0,1fr))}}