.header-actions{display:flex;gap:6px;margin-left:auto}.header-actions button{border:1px solid #bbb4a8;border-radius:4px;padding:7px 10px;background:#fff;color:#4b4741;font-size:10px;font-weight:700;cursor:pointer;white-space:nowrap}.header-actions button:hover{background:#eee7dc}.truth .header-actions button{background:#191919;color:#ddd;border-color:#555}.noise-overlay#noise-overlay{position:fixed;inset:0;z-index:9999;display:block;overflow:hidden;isolation:isolate;opacity:0;visibility:hidden;pointer-events:none;cursor:pointer;background:repeating-linear-gradient(0deg,rgba(210,210,210,.16) 0,rgba(110,110,110,.22) 1px,rgba(185,185,185,.16) 2px,rgba(90,90,90,.18) 3px),linear-gradient(180deg,rgba(120,120,120,.18),rgba(165,165,165,.18));transition:opacity .08s}.noise-overlay#noise-overlay.is-active{display:block;opacity:1;visibility:visible;pointer-events:auto}.noise-layer,.noise-flash,.noise-message{position:absolute}.noise-layer{inset:-8%;pointer-events:none;z-index:1}.noise-layer-1{background:repeating-linear-gradient(0deg,rgba(240,240,240,.18) 0,rgba(70,70,70,.24) 1px,rgba(200,200,200,.18) 2px,rgba(90,90,90,.22) 3px,rgba(170,170,170,.14) 4px);mix-blend-mode:screen}.noise-layer-2{background:repeating-linear-gradient(90deg,rgba(255,255,255,.03) 0,rgba(0,0,0,.08) 2px,rgba(255,255,255,.03) 4px),repeating-linear-gradient(0deg,rgba(255,255,255,.08) 0,rgba(0,0,0,.12) 2px,rgba(255,255,255,.06) 4px,rgba(0,0,0,.08) 6px);mix-blend-mode:overlay}.noise-layer-3{background:linear-gradient(180deg,transparent 0,rgba(255,255,255,.16) 14%,rgba(0,0,0,.12) 28%,rgba(255,255,255,.1) 44%,rgba(0,0,0,.1) 62%,rgba(255,255,255,.12) 78%,transparent 100%);opacity:.55;filter:blur(.4px)}.noise-flash{inset:0;z-index:2;background:linear-gradient(180deg,transparent 0,rgba(255,255,255,.16) 25%,transparent 52%,rgba(255,255,255,.12) 76%,transparent 100%);opacity:0}.noise-message#noise-message{z-index:10;top:50%;left:50%;transform:translate(-50%,-50%);width:min(88vw,760px);padding:0 16px;border:0;background:transparent;box-shadow:none;text-align:center;white-space:nowrap;color:#7c0606;font:900 clamp(1.8rem,3.2vw,3rem)/1.65 "Yu Gothic",sans-serif;letter-spacing:.14em;pointer-events:none;text-shadow:0 0 1px rgba(255,255,255,.45),0 0 3px rgba(255,255,255,.25),0 0 4px #000,0 0 10px #000,0 0 18px rgba(0,0,0,.95),0 3px 6px rgba(60,0,0,.95),0 0 16px rgba(120,0,0,.7)}.noise-message:before,.noise-message:after{content:"サイトが改変されました。";position:absolute;inset:0;pointer-events:none}.noise-message:before{color:rgba(255,220,220,.22);transform:translate(2px,0);mix-blend-mode:screen}.noise-message:after{color:rgba(50,0,0,.42);transform:translate(-2px,1px)}.noise-overlay.is-active .noise-layer-1{animation:staticBandA .08s steps(2,end) infinite}.noise-overlay.is-active .noise-layer-2{animation:staticBandB .11s steps(3,end) infinite}.noise-overlay.is-active .noise-layer-3{animation:rollingBand .28s linear infinite}.noise-overlay.is-active .noise-flash{animation:flashSweep .32s linear infinite}@keyframes staticBandA{0%{opacity:.95;transform:translateY(-8px) scaleY(1.04)}50%{opacity:.7;transform:translateY(5px) scaleY(1.01)}100%{opacity:.92;transform:translateY(-3px) scaleY(1.05)}}@keyframes staticBandB{0%{opacity:.65;transform:translateX(-10px)}50%{opacity:.45;transform:translateX(12px)}100%{opacity:.7;transform:translateX(-6px)}}@keyframes rollingBand{from{transform:translateY(-24%)}to{transform:translateY(24%)}}@keyframes flashSweep{0%{opacity:0;transform:translateY(-18%)}35%{opacity:.42}100%{opacity:0;transform:translateY(18%)}}@media(max-width:1100px){header{padding:0 2vw}.header-actions button{padding:6px;font-size:9px}nav{display:none}#menu{display:block}}@media(max-width:760px){.header-actions{position:absolute;top:72px;left:0;right:0;padding:7px;background:var(--paper);justify-content:center;border-bottom:1px solid #ddd8ce}.header-actions button{flex:1;max-width:145px}.noise-message#noise-message{white-space:normal;letter-spacing:.08em;line-height:1.5}}