:root{--ink:#11120f;--ink-soft:#1b1c18;--paper:#f1efe7;--paper-dim:#c9c7bd;--acid:#dfff4f;--coral:#ff6f58;--line:#f1efe72e;--shadow:0 22px 70px #0000005c}*{box-sizing:border-box}html{background:var(--ink);color:var(--paper);-webkit-text-size-adjust:100%;min-height:100%;font-family:Arial,Helvetica,sans-serif}body{background:radial-gradient(circle at 86% 12%, #dfff4f14, transparent 26rem), linear-gradient(var(--ink), var(--ink));min-height:100dvh;margin:0}button,input{color:inherit;font:inherit}button{-webkit-tap-highlight-color:transparent;touch-action:manipulation}button:focus-visible,input:focus-visible{outline:3px solid var(--acid);outline-offset:4px}h1,h2,p{margin-top:0}svg{display:block}.visually-hidden{clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.screech-app{min-height:100dvh;padding-bottom:calc(88px + env(safe-area-inset-bottom))}.app-header{height:calc(72px + 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h1{margin-bottom:18px;font-size:clamp(3rem,9vw,5.7rem)}.section-heading>p:last-child{color:var(--paper-dim);max-width:540px;font-size:1rem;line-height:1.55}.image-machine,.receiver{box-shadow:var(--shadow);background:#080906;border:1px solid #dfff4f2e;padding:12px 12px 0;position:relative;overflow:hidden}.image-machine canvas,.receiver canvas{aspect-ratio:4/3;image-rendering:auto;object-fit:cover;background-color:#121310;background-image:linear-gradient(45deg,#171814 25%,#0000 25%),linear-gradient(-45deg,#171814 25%,#0000 25%),linear-gradient(45deg,#0000 75%,#171814 75%),linear-gradient(-45deg,#0000 75%,#171814 75%);background-position:0 0,0 8px,8px -8px,-8px 0;background-size:16px 16px;width:100%;height:auto;display:block}.image-machine.is-active canvas{filter:saturate(.9)contrast(1.02)}.scan-line{background:var(--acid);box-shadow:0 0 22px var(--acid);height:2px;position:absolute;left:12px;right:12px;transform:translateY(10px)}.machine-readout,.receiver-readout{color:#85877c;letter-spacing:.08em;justify-content:space-between;align-items:center;min-height:54px;font-family:monospace;font-size:.66rem;display:flex}.machine-readout strong{color:var(--acid);font-size:.72rem}.empty-photo{aspect-ratio:4/3;cursor:pointer;background:#151612;border:1px dashed #5f6252;place-content:center;gap:8px;width:100%;font-weight:800;display:grid}.empty-photo span{color:var(--acid);text-align:center;font-size:3rem;font-weight:300;line-height:1}.button-stack{gap:12px;margin-top:24px;display:grid}.primary-button,.stop-button{cursor:pointer;letter-spacing:.04em;text-transform:uppercase;border:0;width:100%;min-height:58px;padding:16px 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