:root{--bg: #0a0e1a;--bg2: #121829;--panel: #161d33;--panel2: #1d2742;--line: #2a3756;--text: #e6ecff;--muted: #8b97b8;--cyan: #2dd4bf;--cyan-dim: #155e57;--gold: #eab308;--danger: #ef4444;--glow: 0 0 12px rgba(45, 212, 191, .4)}*{box-sizing:border-box}body{margin:0;background:radial-gradient(1200px 800px at 70% -10%,#15203a 0%,var(--bg) 60%);color:var(--text);font-family:Segoe UI,Noto Sans Thai,system-ui,sans-serif}h1,h2,h3{font-weight:700}button{font-family:inherit;cursor:pointer;border:1px solid var(--line);background:var(--panel2);color:var(--text);border-radius:8px;padding:8px 14px;font-size:14px;transition:all .12s 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var(--line);border-radius:8px;background:var(--bg2)}.tut-bell-shot.eq{border-color:var(--cyan-dim)}.tut-bell-bit{width:30px;height:30px;display:grid;place-items:center;font-family:ui-monospace,monospace;font-weight:800;font-size:16px;color:var(--cyan);background:var(--panel2);border:1px solid var(--cyan-dim);border-radius:6px}.tut-bell-bit.sm{width:20px;height:20px;font-size:12px;display:inline-grid;vertical-align:middle}.tut-bell-link{color:var(--muted);font-size:13px}.tut-bell-legend{font-size:14.5px;color:var(--muted);line-height:1.65}.tut-truth{border:1px solid var(--line);border-radius:10px;overflow:hidden;margin:12px 0;background:var(--bg2)}.tut-truth-row{display:grid;grid-template-columns:1fr 1.7fr;gap:8px;padding:9px 14px;border-bottom:1px solid var(--line);font-size:14px}.tut-truth-row:last-child{border-bottom:none}.tut-truth-row.head{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.5px}.tut-score{border:1px solid var(--line);border-radius:10px;overflow:hidden;margin:12px 0;background:var(--bg2)}.tut-score-row{display:flex;justify-content:space-between;gap:10px;padding:11px 16px;border-bottom:1px dashed var(--line);font-size:15.5px}.tut-score-row:last-child{border-bottom:none}.tut-score-row .ok{color:#4ade80;font-weight:700}.tut-score-row .no{color:var(--muted)}@media(max-width:560px){.tut-head-title{font-size:16px}.tut-flow-count{display:none}}@media(prefers-reduced-motion:reduce){.tutorial,.tut-done-badge{animation:none}}.tut-circuit{width:100%;max-width:540px;height:auto;display:block;margin:12px 0}.cd-wire{stroke:var(--line);stroke-width:2.5}.cd-wire.sel{stroke:var(--gold);filter:drop-shadow(0 0 4px rgba(234,179,8,.75))}.cd-ket{font-family:ui-monospace,monospace;font-weight:800;font-size:18px}.cd-ket.def{fill:var(--cyan)}.cd-ket.sup{fill:var(--gold)}.cd-ket.q{fill:var(--muted)}.cd-label{fill:var(--muted);font-size:13px}.cd-head{fill:var(--muted);font-size:12px;letter-spacing:.4px}.cd-ctrl{fill:var(--cyan)}.cd-link{stroke:var(--cyan);stroke-width:2.5}.cd-tgt circle,.cd-tgt line{stroke:var(--cyan);stroke-width:2.5;fill:none}.cd-swap line{stroke:var(--gold);stroke-width:3.5;stroke-linecap:round}.cd-gate{fill:var(--panel2);stroke:var(--cyan-dim);stroke-width:1.5}.cd-gate-txt{fill:var(--text);font-weight:800;font-size:17px;font-family:ui-monospace,monospace}.cd-hit{fill:transparent;cursor:pointer}.tut-case{margin:14px 0}.tut-case-cap,.tut-play-out{font-size:15.5px;line-height:1.65;padding:11px 14px;border-radius:8px;margin-top:4px;border:1px solid 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var(--cyan-dim);font-family:ui-monospace,monospace;font-size:16px}.tut-alt b{color:var(--cyan);font-weight:800}.tut-tt{border:1px solid var(--line);border-radius:10px;overflow:hidden;margin:14px 0;background:var(--bg2);max-width:460px}.tut-tt-row{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px;padding:11px 14px;border-bottom:1px solid var(--line);align-items:center;justify-items:center;font-size:15px}.tut-tt-row:last-child{border-bottom:none}.tut-tt-row.head{color:var(--muted);font-size:12.5px;text-transform:uppercase;letter-spacing:.4px;background:#ffffff05}.tut-tt-row.flip{background:#eab3080f}