@property --ang{syntax: "<angle>"; initial-value: 0deg; inherits: false;}:root,:root[data-theme=dark]{--bg: #04060b;--panel: #0c111b;--term: #070b12;--text: #e9edf5;--muted: #8b95a8;--dim: #5c6779;--border: #1d2635;--head: #10161f;--bubble: #121a27;--bubble-border: #1f2a3a;--field-bg: #070b12;--header-bg: rgba(4,6,11,.7);--ctrl-bg: #120e16;--glass: rgba(12,17,27,.82);--stroke: #223048;--hero-fill: transparent;--reason: #4d9fff;--act: #f4a52a;--observe: #3ddc97;--check: #ff5d5d;--halt: #9fe6c4;--violet: #8b5cf6;--cyan: #22d3ee;--grad-brand: linear-gradient(135deg, #4d9fff 0%, #8b5cf6 100%)}:root[data-theme=light]{--bg: #f4f7fd;--panel: #ffffff;--term: #0a101d;--text: #131f38;--muted: #57637c;--dim: #7e89a0;--border: #dce4f2;--head: #eef3fb;--bubble: #eef2f9;--bubble-border: #dbe3f0;--field-bg: #f2f5fb;--header-bg: rgba(255,255,255,.8);--ctrl-bg: #fdf2f4;--glass: rgba(255,255,255,.85);--stroke: #ccd8ec;--hero-fill: #17264a}*{box-sizing:border-box}html,body{margin:0;background:var(--bg);color:var(--text);overflow-x:hidden;font-family:IBM Plex Sans,system-ui,sans-serif;-webkit-font-smoothing:antialiased;scroll-behavior:smooth;transition:background .3s ease,color .3s ease}body:before{content:"";position:fixed;top:-20%;right:-20%;bottom:-20%;left:-20%;z-index:-1;pointer-events:none;background:radial-gradient(46% 38% at 12% 8%,rgba(77,159,255,.13),transparent 65%),radial-gradient(38% 34% at 92% 12%,rgba(139,92,246,.11),transparent 65%),radial-gradient(40% 36% at 82% 78%,rgba(61,220,151,.08),transparent 65%),radial-gradient(34% 30% at 8% 86%,rgba(244,165,42,.07),transparent 65%);animation:aurora 36s ease-in-out infinite alternate}:root[data-theme=light] body:before{background:radial-gradient(46% 38% at 12% 8%,rgba(77,159,255,.14),transparent 65%),radial-gradient(38% 34% at 92% 12%,rgba(139,92,246,.1),transparent 65%),radial-gradient(40% 36% at 82% 78%,rgba(61,220,151,.1),transparent 65%)}a{color:var(--reason);text-decoration:none}button{font-family:inherit;cursor:pointer}button:disabled{opacity:.5;cursor:not-allowed}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--reason);outline-offset:2px}input,select{font-family:inherit}h1,h2,h3,.foot-title{font-family:Sora,IBM Plex Sans,sans-serif;letter-spacing:-.03em}.mono{font-family:IBM Plex Mono,ui-monospace,monospace}.hidden{display:none!important}.dim-s{color:var(--muted);font-size:12px}.good-s{color:var(--observe)}.bad{color:var(--check)!important}.col{display:flex;flex-direction:column}.gap{gap:16px}@keyframes aurora{0%{transform:translateZ(0) scale(1)}to{transform:translate3d(3%,-2%,0) scale(1.06)}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes spin-rev{to{transform:rotate(-360deg)}}@keyframes pulse{0%,to{opacity:.5}50%{opacity:1}}@keyframes blink{0%,49%{opacity:1}50%,to{opacity:0}}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-4px)}75%{transform:translate(4px)}}@keyframes mq{0%{transform:translate(0)}to{transform:translate(-50%)}}@keyframes borderspin{to{--ang: 360deg}}@keyframes gradshift{0%,to{background-position:0% 50%}50%{background-position:100% 50%}}header{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:12px;padding:12px 22px;background:var(--header-bg);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}.brand{font-weight:700;font-family:Sora,sans-serif;letter-spacing:-.02em}.nav{display:flex;gap:4px;margin:0 auto;flex-wrap:wrap}.nav-link{font-family:IBM Plex Mono,monospace;font-size:12px;color:var(--muted);padding:4px 10px;border:1px solid transparent;border-radius:999px;transition:color .2s,border-color .2s,background .2s}.nav-link:hover{color:var(--text);border-color:var(--border);background:#4d9fff12}.badge{display:inline-flex;align-items:center;gap:8px;padding:5px 12px;border:1px solid var(--stroke);border-radius:999px;background:#4d9fff0f;font-size:12px;color:var(--muted)}.badge .dot{width:7px;height:7px;border-radius:50%;background:var(--observe);box-shadow:0 0 8px var(--observe);animation:pulse 2.4s ease-in-out infinite}.theme-toggle{width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;font-size:15px;border:1px solid var(--border);border-radius:999px;background:var(--panel);color:var(--text);transition:border-color .2s,transform .15s}.theme-toggle:hover{border-color:var(--reason);transform:translateY(-1px) rotate(15deg)}.hero{position:relative;min-height:92vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:80px 24px 90px;overflow:hidden}.hero-orbit{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;pointer-events:none;opacity:.65}.orbit-svg{width:min(820px,140vw);height:min(820px,140vw)}.orbit-ring{fill:none;stroke:var(--stroke);stroke-width:1.2;opacity:.8}.orbit-ring.r1{stroke-dasharray:3 16;stroke-linecap:round;animation:spin 50s linear infinite;transform-origin:center}.orbit-ring.r2{opacity:.5;animation:spin-rev 70s linear infinite;transform-origin:center}.orbit-ring.r3{opacity:.35}.orbit-dots{transform-origin:200px 200px;animation:spin 26s linear infinite}.orbit-dots circle{animation:pulse 3.2s ease-in-out infinite}.hero-content{position:relative;z-index:2;width:100%;max-width:820px;display:flex;flex-direction:column;align-items:center;gap:24px}.hero-eyebrow{display:inline-block;font-size:12.5px;color:var(--muted);border:1px solid var(--stroke);border-radius:999px;padding:7px 16px;background:#4d9fff0d;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.hero h1{font-size:clamp(36px,7vw,72px);line-height:1.02;font-weight:800;margin:0;max-width:100%;background:linear-gradient(120deg,#fff,#cfe0ff 34%,#8fb4ff 62%,#b79cff);background-size:200% 200%;animation:gradshift 9s ease-in-out infinite;-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}:root[data-theme=light] .hero h1{background:linear-gradient(120deg,#17264a,#2f54b0 55%,#7345d6);background-size:200% 200%;-webkit-background-clip:text;background-clip:text}.hero .sub{max-width:640px;margin:0}.beat-chips{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}.bchip{font-family:IBM Plex Mono,monospace;font-size:12.5px;font-weight:600;color:var(--c);border:1px solid color-mix(in srgb,var(--c) 45%,transparent);background:color-mix(in srgb,var(--c) 10%,transparent);border-radius:999px;padding:6px 14px}.cta-row{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}.hero-def{max-width:640px;margin:0;color:var(--muted);font-size:13.5px;line-height:1.5}.hero-note{color:var(--muted);font-size:12.5px}.scroll-cue{position:absolute;bottom:20px;left:50%;transform:translate(-50%);font-size:11px;letter-spacing:.18em;color:var(--muted);animation:float 2.8s ease-in-out infinite}.skip-link{position:absolute;left:8px;top:-48px;z-index:100;background:var(--panel);color:var(--text);border:1px solid var(--reason);border-radius:8px;padding:8px 14px;font-size:13px;transition:top .15s ease}.skip-link:focus{top:8px}details.advanced{border-top:1px solid var(--border);margin-top:2px;padding-top:8px}details.advanced>summary{cursor:pointer;color:var(--muted);font-size:12.5px;list-style:none;padding:6px 0}details.advanced>summary::-webkit-details-marker{display:none}details.advanced>summary:before{content:"▸ "}details.advanced[open]>summary:before{content:"▾ "}details.advanced>summary:hover{color:var(--text)}.adv-body{margin-top:10px}.marquee{overflow:hidden;border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:13px 0;background:color-mix(in srgb,var(--panel) 55%,transparent)}.mq-track{display:inline-flex;align-items:center;white-space:nowrap;animation:mq 36s linear infinite}.mq-item{display:inline-flex;align-items:center;gap:18px;padding-right:18px;font-size:13px;color:var(--muted)}.mq-dot{width:5px;height:5px;border-radius:50%;background:var(--reason);opacity:.5}.mq-item:nth-child(4n+2) .mq-dot{background:var(--act)}.mq-item:nth-child(4n+3) .mq-dot{background:var(--observe)}.mq-item:nth-child(4n) .mq-dot{background:var(--check)}main{max-width:1200px;margin:0 auto;padding:0 24px}.sub{color:var(--muted);font-size:17px;line-height:1.55;margin:0}.lesson{position:relative;padding:92px 0;border-top:1px solid var(--border)}.ghost-num{position:absolute;top:34px;right:-6px;z-index:0;pointer-events:none;font-family:Sora,sans-serif;font-weight:800;font-size:clamp(110px,18vw,230px);line-height:1;color:transparent;-webkit-text-stroke:1.5px var(--stroke);opacity:.5;-webkit-user-select:none;user-select:none}.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.2,1)}.reveal.in{opacity:1;transform:none}.lead{position:relative;z-index:1;text-align:center;width:100%;max-width:740px;margin:0 auto 36px}.lesson-body{position:relative;z-index:1}.eyebrow{font-size:12.5px;letter-spacing:.16em;color:var(--reason);text-transform:uppercase;margin-bottom:13px}.lesson h2{font-size:clamp(26px,3.8vw,42px);font-weight:700;margin:0 0 12px}.task{display:block;width:fit-content;max-width:100%;margin:0 auto 24px;font-size:13px;color:var(--muted);padding:10px 18px;border:1px dashed var(--stroke);border-radius:999px;background:color-mix(in srgb,var(--panel) 60%,transparent)}.task b{color:var(--text)}.split{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:22px;align-items:start}.split-wide{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(240px,1fr);gap:18px;align-items:stretch}.card{border:1px solid var(--border);border-radius:18px;background:var(--glass);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);overflow:hidden;display:flex;flex-direction:column;transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease}.card:hover{border-color:var(--stroke);transform:translateY(-2px);box-shadow:0 24px 60px -34px #000000e6,0 0 0 1px color-mix(in srgb,var(--reason) 18%,transparent)}.card.loop{border-color:#223447;background:var(--term);color:#e9edf5;box-shadow:0 0 0 1px #4d9fff0f,0 26px 70px -38px #4d9fff66}.card.pad{padding:22px}.card.pad.col{gap:14px}.card-head{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--border);background:var(--head)}.card.loop .card-head{background:#0b1119;border-bottom-color:#14202e}.card-body{padding:16px}.card-body.col{display:flex;flex-direction:column;gap:12px;min-height:300px}.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-top:1px solid var(--border);background:var(--head)}.card.loop .card-foot{background:#0b1119;border-top-color:#14202e}.tag{font-size:11px;padding:4px 10px;border-radius:999px;background:#8b95a824;color:var(--muted)}.tag.new{background:#4d9fff29;color:#7bb8ff}.card.loop .card-head,.card.loop .card-foot{color:#e9edf5}.card.loop .dim-s,.card.loop .tag:not(.new){color:#8b95a8}.bubble{align-self:flex-start;max-width:92%;background:var(--bubble);border:1px solid var(--bubble-border);border-radius:16px 16px 16px 5px;padding:12px 15px;font-size:14px;line-height:1.5}.bubble.you{align-self:flex-end;border-radius:16px 16px 5px}.hype{color:var(--check);text-decoration:underline wavy var(--check);text-underline-offset:3px}.note{font-size:13.5px;line-height:1.55;color:var(--muted);border-left:2px solid var(--check);padding-left:12px}.note.good{color:#6ecfa5;border-left-color:var(--observe)}.card.loop .note.good{color:#9fe6c4}.term{font-size:12.5px;line-height:1.78;height:340px;overflow-y:auto;color:#dfe4ec;background-image:repeating-linear-gradient(transparent 0 2px,#ffffff03 2px,#ffffff03 3px)}.term.mini{height:210px}.term .row{display:flex;gap:12px;white-space:pre-wrap;overflow-wrap:anywhere}.term .prompt{color:#5c6779}.term .cursor{display:inline-block;width:7px;height:13px;vertical-align:-2px;margin-left:2px;animation:blink 1s step-end infinite}.btn{position:relative;overflow:hidden;font-size:13.5px;font-weight:600;border-radius:999px;padding:9px 18px;border:1px solid var(--border);background:var(--panel);color:var(--text);transition:transform .15s ease,border-color .2s,filter .2s,box-shadow .2s}.btn:hover:not(:disabled){border-color:var(--reason);transform:translateY(-1px)}.btn.primary{background:var(--grad-brand);color:#fff;border:none;box-shadow:0 10px 30px -12px #6378ffbf}.btn.primary:after{content:"";position:absolute;top:0;bottom:0;left:-70%;width:45%;background:linear-gradient(105deg,transparent,rgba(255,255,255,.35),transparent);transform:skew(-20deg);transition:left .5s ease}.btn.primary:hover:not(:disabled):after{left:130%}.btn.primary:hover:not(:disabled){filter:brightness(1.06);transform:translateY(-1px)}.btn.ghost{background:transparent;border:1px solid var(--stroke)}.btn.ghost:hover:not(:disabled){background:#4d9fff14}.btn.danger{background:#e0322f;color:#fff;border:none;font-size:15px;letter-spacing:.03em;box-shadow:0 0 24px #e0322f80;animation:pulse .95s ease-in-out infinite}.btn.block{width:100%}.btn.lg{padding:15px 28px;font-size:16px;display:inline-block}.beats{display:grid;grid-template-columns:minmax(280px,1fr) minmax(300px,1fr);gap:42px;align-items:center}.ring{position:relative;width:min(360px,78vw);aspect-ratio:1;margin:0 auto}.ring-track{position:absolute;top:0;right:0;bottom:0;left:0;border:2px dashed var(--stroke);border-radius:50%;animation:spin 32s linear infinite}.ring-orbit{position:absolute;top:0;right:0;bottom:0;left:0;transition:transform .6s cubic-bezier(.5,.15,.2,1)}.orbiter{position:absolute;top:-7px;left:calc(50% - 7px);width:14px;height:14px;border-radius:50%;background:var(--reason)}.beat-node{position:absolute;transform:translate(-50%,-50%);border:none;background:transparent;padding:0;z-index:2}.beat-node.pos-top{top:0;left:50%}.beat-node.pos-right{top:50%;left:100%}.beat-node.pos-bottom{top:100%;left:50%}.beat-node.pos-left{top:50%;left:0}.beat-dot{display:flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:50%;background:var(--c);color:#06101d;font-weight:700;font-family:IBM Plex Mono,monospace;font-size:13px;transition:box-shadow .25s,transform .25s}.beat-node.active .beat-dot{transform:scale(1.22);box-shadow:0 0 0 5px color-mix(in srgb,var(--c) 26%,transparent),0 0 28px var(--c)}.ring-label{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:12px;letter-spacing:.12em;pointer-events:none}.beat-panel{border:1px solid var(--border);border-radius:18px;background:var(--glass);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);padding:26px;min-height:190px}.beat-name{display:flex;align-items:center;gap:10px;font-weight:700;font-size:20px;font-family:Sora,sans-serif;margin-bottom:12px}.beat-name-dot{width:12px;height:12px;border-radius:50%;transition:background .3s}.beat-idx{margin-left:auto;font-size:11px;color:var(--muted);font-weight:400}.beat-desc{margin:0;font-size:15.5px;line-height:1.55;color:var(--muted)}.field-label{display:block;font-size:13px;font-weight:600;margin-bottom:6px}.field{width:100%;font-size:14px;color:var(--text);background:var(--field-bg);border:1px solid var(--border);border-radius:10px;padding:11px 13px;transition:border-color .2s,box-shadow .2s}:root[data-theme=dark] .field{color:#e9edf5}.field:focus{box-shadow:0 0 0 3px #4d9fff29}.field.ok{border-color:var(--observe);box-shadow:0 0 0 3px #3ddc9724}.field.warn{border-color:var(--act)}.hint{margin-top:7px;font-size:12px;line-height:1.45;color:var(--act)}.lint{margin-top:6px;font-size:12px;min-height:16px}.vague{font-size:13px;color:var(--check);margin-bottom:14px}.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}.checks{display:flex;flex-wrap:wrap;gap:10px}.check{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--text);padding:8px 14px;border:1px solid var(--border);border-radius:999px;background:var(--field-bg);cursor:pointer}.check input{accent-color:var(--reason)}.controls{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:16px;padding:14px 16px;border:1px solid var(--border);border-radius:16px;background:var(--ctrl-bg);align-items:center}.toggle{font-size:13.5px;font-weight:600;color:var(--text);background:var(--field-bg);border:1px solid var(--border);padding:9px 16px;border-radius:999px;transition:background .2s,border-color .2s}.toggle.on-good{background:#3ddc971f;border-color:var(--observe)}.toggle.on-bad{background:#ff5d5d1f;border-color:var(--check)}.controls .btn.primary{margin-left:auto}.side{display:flex;flex-direction:column;gap:14px}.metrics{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:10px}.metric{font-family:IBM Plex Mono,monospace;font-size:26px;font-weight:600;color:var(--reason);transition:color .2s}.metric.good-s{color:var(--observe)}.metric-label{font-size:11px;color:var(--muted);margin-top:2px}.plug{padding:14px 16px;border-top:1px solid #3a1414;background:#ff5d5d12}.card.loop:has(.plug:not(.hidden)){animation:shake .4s ease-in-out infinite;border-color:#e0322f;box-shadow:0 0 0 1px #e0322f80,0 0 44px #e0322f47}.loop-card{border:1px solid var(--border);border-radius:18px;background:linear-gradient(160deg,color-mix(in srgb,var(--panel) 90%,var(--reason) 4%),var(--panel));padding:22px;position:relative;overflow:hidden}.loop-card:after{content:"";position:absolute;top:-30px;right:-30px;width:130px;height:130px;border-radius:50%;background:radial-gradient(circle,rgba(77,159,255,.16),transparent 70%)}.loop-card-h{font-weight:700;font-size:13px;margin-bottom:14px}.loop-card-row{display:flex;gap:10px;font-size:12.5px;line-height:1.5;margin-bottom:8px}.loop-card-k{flex:0 0 68px;font-weight:600}.loop-card-v{color:var(--text);overflow-wrap:anywhere}.loop-card .btn{margin-top:14px}.checkpoint{position:relative;z-index:1;margin:38px auto 0;max-width:760px;border:1px solid var(--border);border-radius:16px;background:var(--glass);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:20px 24px}.cp-tag{font-size:11px;letter-spacing:.14em;color:var(--act);margin-bottom:8px}.checkpoint p{margin:0;color:var(--muted);font-size:14.5px;line-height:1.55}.learned{margin-top:14px;font-size:13.5px;color:var(--observe)}#studioSrc.live{color:var(--observe)}#studioSrc.live:before{content:"● ";color:var(--observe)}.sched{margin-top:18px}.sched-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px}.sched-row .field{width:auto}.sched-list{display:flex;flex-direction:column;gap:8px}.sched-item{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12.5px;color:var(--text);border:1px solid var(--border);border-radius:12px;padding:8px 14px;background:var(--field-bg)}.gallery 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