:root{color-scheme:dark;--bg:#070b12;--panel:rgba(7,16,27,.82);--line:rgba(122,221,255,.55);--cyan:#5fe7ff;--muted:#8aa5b8;--white:#e8f7ff;--gold:#ffc86b;--hp:#ff4b4b;--shield:#39cfff;--energy:#ffc34f}*{box-sizing:border-box}html,body{margin:0;width:100%;height:100%;overflow:hidden;background:var(--bg);color:var(--white);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;touch-action:none;user-select:none;-webkit-user-select:none}button{font:inherit}#terrain-world{position:fixed;inset:0;width:100%;height:100%;display:block;background:#07101a;z-index:0}#game-world{position:fixed;inset:0;width:100%;height:100%;display:block;background:transparent;z-index:1;pointer-events:none}.world-vignette{position:fixed;inset:0;pointer-events:none;background:radial-gradient(ellipse at center,transparent 35%,rgba(0,0,0,.58) 100%)}.hud-frame{position:relative;background:linear-gradient(135deg,rgba(10,22,35,.92),rgba(5,12,20,.7));border:1px solid var(--line);box-shadow:0 0 25px #00152166,inset 0 0 18px #5fe7ff0b;backdrop-filter:blur(9px);clip-path:polygon(10px 0,calc(100% - 10px) 0,100% 10px,100% calc(100% - 10px),calc(100% - 10px) 100%,10px 100%,0 calc(100% - 10px),0 10px)}.hud-frame:after{content:"";position:absolute;inset:4px;border:1px solid #7ce7ff13;pointer-events:none}