:root{--bg:#f5f7fb;--card:#fff;--text:#182c43;--muted:#52667c;--border:#dbe3ee;--accent:#005a9e;--high:#007b65;--low:#8695a7;--soft:#e9f2fb;--q1:#007b65;--q2:#2262b8;--q3:#8b3fb0}
button:disabled{opacity:.5;cursor:not-allowed}
.qr-area{flex-shrink:0}.qr-area img{display:block;width:110px;height:110px;object-fit:contain;background:white;padding:6px;border:1px solid var(--border);border-radius:8px}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.5 'Segoe UI',Arial,sans-serif}.wrap{max-width:1440px;margin:auto;padding:24px}h1,h2,h3,p{margin:0}h1{font-size:2.25rem;line-height:1.2;letter-spacing:-.04em}h2{font-size:1.3rem;line-height:1.3}p{margin-top:8px}.masthead{display:flex;align-items:center;gap:24px;padding:12px 0 26px}.logo{object-fit:contain;width:95px;height:76px}.heading{flex:1}.heading p{color:var(--muted)}.eyebrow{display:block;color:var(--accent);font-size:.8rem;letter-spacing:.09em;font-weight:700;margin-bottom:5px}.qr-placeholder{width:88px;height:88px;border:2px dashed #94a8ba;border-radius:12px;display:grid;place-content:center;text-align:center;color:var(--muted);background:white}.qr-placeholder span{font-size:1.55rem;font-weight:700}.qr-placeholder small{font-size:.75rem}.tabs{display:flex;gap:6px;border-bottom:1px solid var(--border);margin-bottom:24px}.tab{background:transparent;border:0;border-bottom:3px solid transparent;border-radius:0;padding:13px 22px;color:var(--muted)}.tab.selected{color:var(--accent);border-color:var(--accent);background:#e9f2fb}.section-head{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:16px}.section-head p{color:var(--muted)}.badge{border:1px solid #b8cede;background:#eaf3fa;padding:6px 12px;border-radius:999px;white-space:nowrap;font-size:.9rem;color:var(--accent)}.variant-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.variant{background:white;text-align:left;padding:16px;border:2px solid var(--border);border-radius:14px;position:relative;color:var(--text);box-shadow:0 3px 10px #18344b04}.variant.selected{border-color:var(--accent);background:var(--soft)}.variant small{display:block;color:var(--muted);font-size:.875rem;margin:4px 0}.variant strong{font-size:1.1rem}.variant .reading{display:flex;align-items:baseline;gap:10px;font-family:Consolas,monospace;margin-top:9px}.variant .reading b{font-size:1.65rem}.variant .reading span{color:var(--muted)}.over{text-decoration:overline}.toolbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;background:#fff;border:1px solid var(--border);border-radius:14px;padding:14px;margin:16px 0}button,select{font:inherit}button{padding:10px 16px;border:1px solid #b5c8d9;border-radius:9px;background:#f6faff;color:#214666;cursor:pointer;font-weight:600;min-height:44px}button:hover{background:#dfeef9}button:focus-visible,select:focus-visible,input:focus-visible,summary:focus-visible,a:focus-visible{outline:3px solid #dc8a00;outline-offset:3px}button.primary{background:var(--accent);border-color:var(--accent);color:white}button.primary:hover{background:#004678}button[aria-pressed=true]:not(.tab):not(.variant){background:#dcf4ed;border-color:var(--high);color:#005a48}.quiet{background:white;color:var(--muted)}select{padding:8px;border:1px solid var(--border);border-radius:7px;background:white;color:var(--text)}.speed{display:flex;align-items:center;gap:8px;font-size:.9rem}.clock-pill{margin-left:auto;padding:6px 14px;border-radius:8px;background:#f0f4f9}.clock-pill b{font-size:1.3rem;margin-left:10px}.card{padding:22px;border-radius:16px;border:1px solid var(--border);background:var(--card);box-shadow:0 4px 15px #15374f04;margin:16px 0}.value{display:flex;align-items:baseline;gap:14px;white-space:nowrap}.value .binary{font:700 2rem Consolas,monospace;letter-spacing:.13em}.value .decimal{color:var(--accent);font-size:1.8rem;font-weight:700}.value small{color:var(--muted);font-size:.8rem}.diagram-scroll{overflow-x:auto}.circuit{display:block;width:100%;min-width:650px;max-height:245px}.circuit text{font-family:'Segoe UI',Arial,sans-serif;font-size:17px;fill:var(--text)}.circuit .wire{fill:none;stroke-width:3;stroke-linejoin:round}.circuit .box{fill:#f7fafc;stroke:#315777;stroke-width:1.6}.circuit .small-label{font-size:14px;fill:var(--muted)}.legend{display:flex;gap:20px;flex-wrap:wrap;color:var(--muted);font-size:.875rem;margin:8px 0}.legend span{display:flex;align-items:center;gap:6px}.swatch{width:10px;height:10px;border-radius:50%;display:inline-block}.swatch.high{background:var(--high)}.swatch.low{background:var(--low)}.event{padding:12px 16px;background:#edf5fc;border-left:4px solid var(--accent);border-radius:0 8px 8px 0;min-height:48px}.chain{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}.chain span{font-size:.9rem;padding:4px 10px;border:1px solid var(--border);border-radius:6px}.small{font-size:.875rem;color:var(--muted)}.check{display:flex;gap:8px;align-items:center;font-size:.9rem}input[type=checkbox],input[type=radio]{width:18px;height:18px;accent-color:var(--accent)}.wave-scroll{overflow-x:auto;margin-top:14px}.wave{display:block;width:100%;min-width:640px}.wave text{font:14px 'Segoe UI',Arial,sans-serif;fill:var(--muted)}.wave-title{font-size:1rem;margin-top:14px}.wave path{stroke-linejoin:round;fill:none;stroke-width:2.4}.sequence-row{display:flex;gap:18px;align-items:center;border-top:1px solid var(--border);padding-top:12px;margin-top:8px}.sequence{display:flex;gap:7px;flex-wrap:wrap;font:600 1rem Consolas,monospace}.sequence span{background:#edf3f8;min-width:28px;padding:4px 8px;text-align:center;border-radius:5px}.sequence span:last-child{background:var(--accent);color:white}.explanation summary{cursor:pointer;font-weight:700}.explanation p{max-width:1000px;margin-top:15px}table{width:100%;border-collapse:collapse;margin-top:20px}caption{text-align:left;font-weight:600;padding-bottom:8px}th,td{text-align:left;border:1px solid var(--border);padding:10px}th{background:#edf4fb}.reset-settings{display:flex;align-items:center;gap:32px;flex-wrap:wrap}fieldset{border:0;margin:0;padding:0}legend{font-weight:700;margin-bottom:8px}fieldset label{margin-right:20px;display:inline-flex;align-items:center;gap:6px}.tryout li{margin:8px 0}footer{display:flex;gap:20px;justify-content:space-between;flex-wrap:wrap;border-top:1px solid var(--border);margin-top:30px;padding:18px 0;color:var(--muted);font-size:.875rem}a{color:var(--accent)}[hidden]{display:none!important}@media(max-width:900px){.variant-grid{grid-template-columns:repeat(2,1fr)}.wrap{padding:16px}.section-head{align-items:flex-start}.clock-pill{margin-left:0}.card{padding:16px}}@media(max-width:540px){h1{font-size:1.75rem}.masthead{gap:12px}.logo{width:60px;height:60px}.qr-placeholder{width:64px;height:72px;flex-shrink:0}.heading p{font-size:.875rem}.eyebrow{font-size:.75rem}.tab{font-size:.875rem;padding:12px 9px;flex:1}.section-head{flex-wrap:wrap}.variant{padding:12px}.variant strong{font-size:1rem}.value .binary{font-size:1.6rem}.toolbar button{flex-grow:1}.badge{font-size:.8rem}.sequence-row{align-items:flex-start}.reset-settings{gap:12px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}@media print{.toolbar,.tabs,.qr-placeholder,footer,.explanation{display:none}.card{break-inside:avoid;box-shadow:none}.wrap{max-width:none;padding:0}body{background:white}}