:root{--body-bg:#1a1a2e;--body-text:#e0ddd5;--panel-bg:#16213e;--panel-border:#2a3a5e;--panel-header:#0f3460;--accent:#e94560;--accent-dim:#943040;--wire-high:#0f8;--wire-low:#444;--wire-glow:#00ff884d;--tab-bg:#0f3460;--tab-active:#e94560;--tab-text:#89a;--tab-active-text:#fff;--mono:"SF Mono", "Cascadia Code", "Fira Code", Consolas, monospace;--sans:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.focus-ring:focus-visible,[role=tab]:focus-visible{outline:2px solid var(--accent,#e94560);outline-offset:2px}@media (prefers-reduced-motion:reduce){*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}.tab-list{background:var(--panel-border,#2a3a5e);border-radius:8px;justify-content:center;gap:2px;max-width:600px;margin:0 auto;padding:3px;display:flex}.tab-list__tab{color:var(--tab-text,#89a);font-family:var(--sans,sans-serif);cursor:pointer;background:0 0;border:none;border-radius:6px;flex:1;padding:.5rem .75rem;font-size:.8rem;font-weight:500;transition:all .2s}.tab-list__tab:hover{color:#ddd;background:#e9456026}.tab-list__tab--active{background:var(--tab-active,#e94560);color:var(--tab-active-text,#fff);font-weight:600}.slider-control{flex-direction:column;gap:.25rem;display:flex}.slider-control__label{color:var(--body-text,#e0ddd5);font-size:.85rem;font-weight:500}.slider-control__row{align-items:center;gap:.75rem;display:flex}.slider-control__input{accent-color:var(--accent,#e94560);flex:1}.slider-control__value{font-family:var(--mono,monospace);text-align:right;min-width:4rem;color:var(--wire-high,#0f8);font-size:.9rem}.slider-control__unit{color:var(--tab-text,#89a);margin-left:.15rem;font-size:.8rem}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-font-smoothing:antialiased;font-size:16px}body{background:var(--body-bg);color:var(--body-text);font-family:var(--sans);min-height:100vh;line-height:1.6}.app{flex-direction:column;gap:1.5rem;max-width:1200px;min-height:100vh;margin:0 auto;padding:1.5rem 1rem;display:flex}.app__header{text-align:center;padding:1rem 0}.app__title{background:linear-gradient(135deg,#ff8a65,#ffb74d,#4fc3f7);-webkit-text-fill-color:transparent;letter-spacing:-.02em;-webkit-background-clip:text;background-clip:text;font-size:2rem;font-weight:700}.app__subtitle{color:var(--tab-text);margin-top:.3rem;font-size:.95rem}.app__main{flex:1}.app__footer{text-align:center;color:var(--tab-text);border-top:1px solid var(--panel-border);padding:1.5rem 0 .5rem;font-size:.8rem}.placeholder{text-align:center;color:var(--tab-text);padding:3rem 1rem;font-size:1.1rem;font-style:italic}.bit-toggle{width:36px;height:36px;font-size:1rem;font-weight:700;font-family:var(--mono);cursor:pointer;background:0 0;border:2px solid;border-radius:6px;transition:all .15s}.bit-toggle--high{color:#4caf50;border-color:#4caf50;box-shadow:0 0 8px #4caf504d}.bit-toggle--low{color:#888;border-color:#555}.bit-toggle:hover{transform:scale(1.1)}.bit-toggle__label{color:var(--tab-text);font-size:.7rem;font-family:var(--mono);margin-top:2px}.wire-label{font-family:var(--mono);align-items:center;gap:.3rem;font-size:.85rem;display:inline-flex}.wire-label__dot{border-radius:50%;width:8px;height:8px}.wire-label__dot--high{background:#4caf50;box-shadow:0 0 6px #4caf5080}.wire-label__dot--low{background:#555}.wire--high{color:#4caf50;stroke:#4caf50}.wire--low{color:#888;stroke:#555}.truth-table{border-collapse:collapse;font-family:var(--mono);margin:.75rem auto;font-size:.8rem}.truth-table caption{color:var(--tab-text);text-align:left;margin-bottom:.3rem;font-size:.75rem}.truth-table th,.truth-table td{text-align:center;border:1px solid var(--panel-border);padding:.25rem .6rem}.truth-table th{background:#ffffff0d;font-weight:600}.truth-table__row--active{background:#4caf5026;outline:1px solid #4caf5066}@media (width<=768px){.app__title{font-size:1.5rem}}@media (width<=480px){.app{padding:1rem .5rem}.app__title{font-size:1.25rem}.tab-list__tab{padding:.4rem .5rem;font-size:.7rem}}.adders{flex-direction:column;gap:2rem;display:flex}.adders__intro{color:var(--body-text);max-width:800px;font-size:.95rem;line-height:1.7}.adder-card{background:var(--panel-bg);border:1px solid var(--panel-border);border-radius:12px;flex-direction:column;gap:.75rem;padding:1.25rem;display:flex}.adder-card--wide{max-width:none}.adder-card__title{color:#ffb74d;font-size:1.1rem;font-weight:700}.adder-card__description{color:var(--tab-text);font-size:.85rem;line-height:1.6}.adder-card__circuit{flex-wrap:wrap;align-items:center;gap:1rem;display:flex}.adder-card__inputs{gap:.5rem;display:flex}.adder-card__svg{flex:1;min-width:200px;max-width:400px;height:auto}.adder-card__outputs{flex-direction:column;gap:.5rem;display:flex}.adder-card__intermediates{background:#ffffff08;border-radius:6px;flex-wrap:wrap;gap:1rem;padding:.5rem;font-size:.8rem;display:flex}.gate-box{fill:#ffffff0d;stroke:var(--panel-border);stroke-width:1.5px}.gate-label{fill:var(--body-text);font-size:11px;font-weight:600;font-family:var(--mono)}.wire-text--high{fill:#4caf50;font-family:var(--mono);font-size:10px}.wire-text--low{fill:#888;font-family:var(--mono);font-size:10px}.wire-text--dim{fill:var(--tab-text);font-family:var(--mono);font-size:10px}.bit-group{align-items:center;gap:.5rem;display:flex}.bit-group__label{font-family:var(--mono);color:var(--body-text);min-width:1.5rem;font-size:1rem;font-weight:700}.bit-group__bits{gap:.25rem;display:flex}.bit-group__decimal{font-family:var(--mono);color:var(--tab-text);min-width:2.5rem;font-size:.9rem}.ripple__operands{background:#ffffff08;border-radius:8px;flex-wrap:wrap;align-items:center;gap:.75rem;padding:.75rem;display:flex}.ripple__operator{color:var(--tab-text);font-size:1.5rem;font-weight:700;font-family:var(--mono)}.ripple__result{flex-direction:column;align-items:center;gap:.25rem;display:flex}.ripple__result-bits{gap:.2rem;display:flex}.ripple__result-bit{width:28px;height:28px;font-family:var(--mono);border:1px solid;border-radius:4px;justify-content:center;align-items:center;font-size:.85rem;font-weight:700;display:flex}.ripple__result-bit--high{color:#4caf50;background:#4caf501a;border-color:#4caf50}.ripple__result-bit--low{color:#888;background:0 0;border-color:#555}.ripple__result-decimal{font-family:var(--mono);color:var(--tab-text);font-size:.85rem}.ripple__equation{font-family:var(--mono);text-align:center;color:var(--body-text);font-size:1rem;font-weight:600}.ripple__overflow{color:var(--tab-text);align-items:center;gap:.5rem;font-size:.85rem;display:flex}.ripple__overflow--active{color:#ff8a65;font-weight:600}.ripple__chain-svg{width:100%;max-width:560px;height:auto}.ripple__snapshot-table{max-width:400px}@media (width<=640px){.adder-card__circuit{flex-direction:column}.ripple__operands{flex-direction:column;align-items:flex-start}.bit-group{flex-wrap:wrap}}.addition{flex-direction:column;gap:2rem;display:flex}.addition__intro{color:var(--body-text);max-width:800px;font-size:.95rem;line-height:1.7}.addition-card{background:var(--panel-bg);border:1px solid var(--panel-border);border-radius:12px;flex-direction:column;gap:.75rem;padding:1.25rem;display:flex}.addition-card__title{color:#ff8a65;font-size:1.1rem;font-weight:700}.addition-card__description{color:var(--tab-text);font-size:.85rem;line-height:1.6}.addition-card__inputs{background:#ffffff08;border-radius:8px;flex-wrap:wrap;align-items:center;gap:1rem;padding:.75rem;display:flex}.addition-card__callout{color:var(--body-text);background:#ffb74d14;border-left:3px solid #ffb74d;border-radius:0 6px 6px 0;padding:.75rem 1rem;font-size:.85rem;line-height:1.6}.sub-step{background:#ffffff05;border-radius:6px;padding:.75rem}.sub-step__title{color:#4fc3f7;margin-bottom:.4rem;font-size:.9rem;font-weight:600}.sub-step__equation{font-family:var(--mono);color:var(--body-text);font-size:1.1rem;font-weight:600}.sub-step__transform{flex-direction:column;gap:.4rem;display:flex}.sub-step__row{align-items:center;gap:.5rem;display:flex}.sub-step__label{font-family:var(--mono);color:var(--tab-text);text-align:right;min-width:7rem;font-size:.85rem}.sub-step__bits{font-family:var(--mono);gap:.15rem;font-size:.9rem;display:flex}.sub-step__note{color:var(--tab-text);margin-left:.5rem;font-size:.8rem;font-style:italic}.bit--high{color:#4caf50;font-weight:700}.bit--low{color:#888}.mul__operator{color:var(--tab-text);font-size:1.5rem;font-weight:700;font-family:var(--mono)}.mul__grid{max-width:500px;font-family:var(--mono);background:#ffffff05;border-radius:8px;flex-direction:column;gap:.2rem;padding:1rem;display:flex}.mul__row{align-items:center;gap:.15rem;display:flex}.mul__row-label{text-align:center;width:1.5rem;color:var(--tab-text);font-weight:700}.mul__row--operand{font-weight:600}.mul__row--partial{font-size:.85rem}.mul__row--skip{opacity:.5}.mul__row--result{font-weight:700}.mul__row-note{color:var(--tab-text);margin-left:.5rem;font-size:.75rem}.mul__cell{justify-content:center;align-items:center;width:20px;height:24px;font-size:.85rem;display:flex}.mul__cell--high{color:#4caf50}.mul__cell--low{color:#555}.mul__divider{border-top:1px solid var(--panel-border);margin:.3rem 0}.mul__equation{font-family:var(--mono);text-align:center;color:var(--body-text);font-size:1.1rem;font-weight:600}@media (width<=640px){.addition-card__inputs{flex-direction:column;align-items:flex-start}.sub-step__row{flex-wrap:wrap}.sub-step__label{text-align:left;min-width:auto}}.alu-view{flex-direction:column;gap:1.5rem;display:flex}.alu-view__intro{color:var(--body-text);max-width:800px;font-size:.95rem;line-height:1.7}.alu-view__panel{background:var(--panel-bg);border:1px solid var(--panel-border);border-radius:12px;flex-direction:column;gap:1rem;padding:1.25rem;display:flex}.alu-view__title{color:#ff8a65;font-size:1.1rem;font-weight:700}.alu-view__operands{background:#ffffff08;border-radius:8px;flex-wrap:wrap;align-items:center;gap:1rem;padding:.75rem;display:flex}.alu-view__op-symbol{color:#ffb74d;font-size:1.5rem;font-weight:700;font-family:var(--mono);text-align:center;min-width:2rem}.alu-view__unary-note{color:var(--tab-text);font-size:.85rem;font-style:italic}.op-selector{flex-wrap:wrap;gap:1.5rem;display:flex}.op-selector__group{align-items:center;gap:.3rem;display:flex}.op-selector__group-label{color:var(--tab-text);text-transform:uppercase;letter-spacing:.05em;margin-right:.3rem;font-size:.75rem}.op-selector__btn{border:2px solid var(--panel-border);color:var(--body-text);font-family:var(--mono);cursor:pointer;background:0 0;border-radius:6px;padding:.4rem .8rem;font-size:.85rem;font-weight:600;transition:all .15s}.op-selector__btn:hover{color:#ffb74d;border-color:#ffb74d}.op-selector__btn--active{color:#ffb74d;background:#ffb74d26;border-color:#ffb74d}.result-display{background:#ffffff08;border-radius:8px;flex-direction:column;gap:.75rem;padding:1rem;display:flex}.result-display__title{color:var(--tab-text);text-transform:uppercase;letter-spacing:.05em;font-size:.9rem;font-weight:600}.result-display__bits{gap:.2rem;display:flex}.result-display__bit{width:28px;height:28px;font-family:var(--mono);border:1px solid;border-radius:4px;justify-content:center;align-items:center;font-size:.85rem;font-weight:700;display:flex}.result-display__bit--high{color:#4caf50;background:#4caf501a;border-color:#4caf50}.result-display__bit--low{color:#888;background:0 0;border-color:#555}.result-display__values{font-family:var(--mono);gap:1rem;font-size:.9rem;display:flex}.result-display__decimal{color:var(--body-text);font-weight:600}.result-display__hex{color:var(--tab-text)}.result-display__flags{flex-wrap:wrap;gap:.75rem;display:flex}.flag-indicator{border:1px solid var(--panel-border);border-radius:6px;flex-direction:column;gap:.15rem;min-width:100px;padding:.4rem .6rem;transition:all .15s;display:flex}.flag-indicator--active{background:#4caf5014;border-color:#4caf50}.flag-indicator__badge{align-items:center;gap:.3rem;display:flex}.flag-indicator__dot{border-radius:50%;width:8px;height:8px}.flag-indicator__dot--set{background:#4caf50;box-shadow:0 0 6px #4caf5080}.flag-indicator__dot--clear{background:#555}.flag-indicator__abbr{font-family:var(--mono);color:var(--body-text);font-size:.85rem;font-weight:700}.flag-indicator__name{color:var(--body-text);font-size:.75rem;font-weight:600}.flag-indicator__desc{color:var(--tab-text);font-size:.7rem}@media (width<=640px){.alu-view__operands{flex-direction:column;align-items:flex-start}.op-selector{flex-direction:column;gap:.5rem}.result-display__flags{flex-direction:column}}.cpu-view{flex-direction:column;gap:1.5rem;display:flex}.cpu-view__intro{color:var(--body-text);max-width:800px;font-size:.95rem;line-height:1.7}.cpu-panel{background:var(--panel-bg);border:1px solid var(--panel-border);border-radius:12px;flex-direction:column;gap:.75rem;padding:1rem;display:flex}.cpu-panel__title{color:#ff8a65;font-size:1rem;font-weight:700}.cpu-loader{flex-direction:column;gap:.5rem;display:flex}.cpu-loader__select{border:1px solid var(--panel-border);background:var(--panel-bg);color:var(--body-text);font-family:var(--sans);border-radius:6px;max-width:300px;padding:.4rem .6rem;font-size:.9rem}.cpu-loader__desc{color:var(--tab-text);font-size:.85rem;line-height:1.5}.cpu-loader__hex{font-family:var(--mono);flex-wrap:wrap;gap:.3rem;font-size:.8rem;display:flex}.cpu-loader__byte{border:1px solid var(--panel-border);color:var(--tab-text);border-radius:3px;padding:.2rem .4rem}.cpu-loader__byte--active{color:#4caf50;background:#4caf501a;border-color:#4caf50}.cpu-btn{border:2px solid var(--panel-border);color:var(--body-text);font-family:var(--mono);cursor:pointer;background:0 0;border-radius:6px;padding:.4rem 1rem;font-size:.85rem;font-weight:600;transition:all .15s}.cpu-btn:hover:not(:disabled){color:#ffb74d;border-color:#ffb74d}.cpu-btn:disabled{opacity:.4;cursor:not-allowed}.cpu-btn--active{color:#4caf50;background:#4caf5026;border-color:#4caf50}.cpu-controls{flex-wrap:wrap;align-items:center;gap:.5rem;display:flex}.cpu-halted{font-family:var(--mono);color:#ff8a65;font-size:.85rem;font-weight:700}.cpu-step-count{font-family:var(--mono);color:var(--tab-text);margin-left:auto;font-size:.8rem}.cpu-state{flex-wrap:wrap;gap:1.5rem;display:flex}.cpu-state__item{align-items:center;gap:.4rem;display:flex}.cpu-state__label{font-family:var(--mono);color:var(--tab-text);font-size:.8rem;font-weight:600}.cpu-state__value{font-family:var(--mono);color:var(--body-text);font-size:1rem;font-weight:700}.cpu-state__hex{font-family:var(--mono);color:var(--tab-text);font-size:.75rem}.cpu-state__flag{font-family:var(--mono);color:#888;font-size:1rem;font-weight:700}.cpu-state__flag--set{color:#4caf50}.cpu-registers{margin-top:.5rem}.cpu-registers__title{color:var(--tab-text);margin-bottom:.4rem;font-size:.8rem;font-weight:600;display:block}.cpu-registers__grid{grid-template-columns:repeat(8,1fr);gap:.3rem;display:grid}.cpu-reg{border:1px solid var(--panel-border);border-radius:4px;flex-direction:column;align-items:center;padding:.2rem;transition:all .2s;display:flex}.cpu-reg--changed{background:#4caf501a;border-color:#4caf50}.cpu-reg__name{font-family:var(--mono);color:var(--tab-text);font-size:.65rem}.cpu-reg__val{font-family:var(--mono);color:var(--body-text);font-size:.85rem;font-weight:700}.cpu-instr{flex-direction:column;gap:.3rem;display:flex}.cpu-instr__row{align-items:center;gap:.5rem;display:flex}.cpu-instr__label{font-family:var(--mono);color:var(--tab-text);min-width:5rem;font-size:.8rem}.cpu-instr__value{font-family:var(--mono);color:var(--body-text);font-size:.9rem}.cpu-instr__mnemonic{font-family:var(--mono);color:#ffb74d;font-size:1rem;font-weight:700}.cpu-alu-trace{background:#ffffff05;border-radius:6px;margin-top:.5rem;padding:.5rem}.cpu-alu-trace__title{color:#4fc3f7;margin-bottom:.3rem;font-size:.85rem;font-weight:600}.cpu-alu-trace__op{font-family:var(--mono);color:var(--body-text);text-transform:uppercase;margin-bottom:.3rem;font-size:.85rem;font-weight:600;display:block}.cpu-trace-list{flex-direction:column;gap:.2rem;max-height:300px;display:flex;overflow-y:auto}.cpu-trace-row{font-family:var(--mono);border-radius:3px;align-items:center;gap:.5rem;padding:.2rem .4rem;font-size:.75rem;display:flex}.cpu-trace-row--current{background:#ffb74d1a;border-left:2px solid #ffb74d}.cpu-trace-row__num{color:var(--tab-text);min-width:2rem}.cpu-trace-row__addr{color:var(--tab-text);min-width:2.5rem}.cpu-trace-row__mnem{color:#ffb74d;min-width:6rem;font-weight:600}.cpu-trace-row__acc{color:var(--body-text);min-width:6rem}.cpu-trace-row__alu{color:#4fc3f7;font-size:.7rem}@media (width<=640px){.cpu-registers__grid{grid-template-columns:repeat(4,1fr)}.cpu-state{flex-direction:column;gap:.5rem}.cpu-trace-row{flex-wrap:wrap}}
