:root{--navy:#023347;--ink:#17262d;--muted:#566570;--teal:#087985;--mist:#e8f7f7;--line:#cbdfe2;--paper:#f7fafa;--gold:#a67312;--warn:#9d3027}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:78px}
body{margin:0;background:var(--paper);color:var(--ink);font:1rem/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;overflow-wrap:break-word}
button,input,select{font:inherit}
button{cursor:pointer;min-height:44px}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--gold);outline-offset:3px}
a{color:var(--navy)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip{position:absolute;top:-80px}
.skip:focus{top:8px;background:#fff;z-index:20;padding:12px}
[hidden]{display:none!important}

.shell{max-width:620px;margin:auto}
.masthead{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:20px 22px 14px}
.masthead img{width:132px;height:auto}
.masthead span{font-size:.7rem;letter-spacing:.14em;color:var(--teal);font-weight:650}
.section-nav{position:sticky;top:0;z-index:5;background:#f7fafaf2;backdrop-filter:blur(6px);border-block:1px solid var(--line);padding:8px 22px;display:flex;align-items:center;gap:12px}
.section-nav select{flex:1;min-width:0;font-size:.875rem;min-height:42px;padding:8px;background:#fff;border:1px solid var(--line);border-radius:8px;color:var(--navy);font-weight:600}
.notes-toggle{display:flex;align-items:center;gap:6px;font-size:.8125rem;color:var(--muted);white-space:nowrap;cursor:pointer}
.notes-toggle input{accent-color:var(--teal);width:17px;height:17px}

section{padding:30px 22px 38px;border-bottom:1px solid var(--line)}
.eyebrow{display:flex;align-items:center;gap:9px;font-size:.6875rem;font-weight:700;letter-spacing:.13em;color:var(--teal);margin:0 0 14px}
.eyebrow b{display:grid;place-items:center;flex-shrink:0;width:27px;height:27px;border:1px solid var(--line);border-radius:50%;letter-spacing:0}
h1,h2{color:var(--navy);font-size:1.875rem;line-height:1.1;font-weight:650;letter-spacing:-.04em;margin:0 0 20px}
.mini-head{font-size:.6875rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:700;margin:24px 0 10px}
.micro{font-size:.6875rem;letter-spacing:.06em;color:#8fa0a6;margin:16px 0 0;text-transform:uppercase}
.pnote{border-left:3px solid var(--gold);background:#fdf9ef;padding:11px 14px;border-radius:0 8px 8px 0;font-size:.9375rem;color:#6b4d16;margin:18px 0 0}
.controls{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:14px}
.primary-button{border:1px solid var(--teal);background:var(--teal);color:#fff;border-radius:9px;padding:11px 18px;font-size:.9375rem;font-weight:650}
.primary-button:hover{background:#066a75}
.primary-button[disabled]{opacity:.5;cursor:default}
.choices{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:18px}
.choices button{border:1px solid var(--line);border-radius:9px;background:#fff;color:var(--navy);padding:9px 13px;font-size:.875rem;flex:1 1 auto;font-weight:600}
.choices [aria-pressed=true]{border-color:var(--teal);background:var(--mist);box-shadow:inset 0 -2px var(--teal)}
.figure{margin:0;background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 16px}
.figure-takeaway{border-top:1px solid var(--line);padding-top:13px;color:var(--teal);font-size:.9375rem;font-weight:600;margin:14px 0 0}
.closing-question{font-size:1.375rem;line-height:1.25;color:var(--navy);font-weight:600;letter-spacing:-.03em;margin:26px 0 0}
.closing{padding:20px 22px;font-size:.875rem;display:flex;flex-wrap:wrap;gap:18px;justify-content:space-between}
.chip-row{display:flex;gap:6px;flex-wrap:wrap}
.gchip{font-size:.8125rem;background:#fff;border:1px solid var(--line);color:var(--navy);border-radius:7px;padding:7px 12px;font-weight:600}

/* 01 access */
.dotgrid{display:grid;grid-template-columns:repeat(40,1fr);gap:2px;margin:14px 0 0}
.dotgrid span{aspect-ratio:1;border-radius:1px;transition:background .3s}
.dotgrid span.d-on{background:var(--teal)}
.dotgrid span.d-off{background:#dfe7e9}
.access-head{display:flex;justify-content:space-between;gap:12px}
.access-head strong{display:block;font-size:1.75rem;line-height:1;color:var(--teal);font-variant-numeric:tabular-nums;letter-spacing:-.045em}
.access-head .is-right{text-align:right}
.access-head .is-right strong{color:var(--warn)}
.access-head span{display:block;font-size:.75rem;color:var(--muted);margin-top:4px}

/* 02 models */
.model-wall{display:grid;gap:8px;grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}
.model{border:1px solid var(--line);border-radius:11px;background:#fff;padding:12px 14px}
.model strong{display:block;color:var(--navy);font-size:.9375rem;letter-spacing:-.02em}
.model span{display:block;font-size:.75rem;color:var(--muted);margin-top:3px}
.model.is-next{border-style:dashed;background:var(--mist)}
.model.is-next strong{color:var(--teal)}

/* threads */
.thread{display:grid;gap:9px}
.msg{border:1px solid var(--line);border-radius:12px;padding:11px 13px;background:#fff}
.msg-who{display:block;font-size:.6875rem;letter-spacing:.08em;font-weight:700;color:var(--muted);margin-bottom:5px}
.msg-who.is-model{color:var(--teal)}
.msg-body{margin:0;font-size:.9375rem;line-height:1.5;color:var(--ink)}
.msg.is-you{background:#eef4f5;border-color:#dce7ea}
.msg.is-ai{border-left:3px solid var(--teal)}
.thread.is-quiet .msg{opacity:.97}

/* 04 room */
.room{border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff}
.room-bar{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 14px;background:#eef4f5;color:var(--muted);font-size:.75rem}
.room.is-shared .room-bar{background:var(--teal);color:#fff}
.room-tag{font-size:.625rem;letter-spacing:.1em;font-weight:700}
.room-people{display:flex;gap:8px;flex-wrap:wrap;padding:12px 14px 0}
.person{display:inline-flex;align-items:center;gap:7px;font-size:.8125rem;color:var(--navy);font-weight:600}
.person i{display:grid;place-items:center;width:26px;height:26px;border-radius:50%;background:var(--navy);color:#fff;font-size:.6875rem;font-weight:700;font-style:normal}
.person b{font-size:.5625rem;letter-spacing:.08em;background:var(--mist);color:var(--teal);border-radius:999px;padding:3px 7px}
.room .thread{padding:12px 14px 14px}

/* 06 tools */
.tool-grid{display:grid;gap:8px;grid-template-columns:repeat(auto-fill,minmax(160px,1fr))}
.tool{border:1px solid var(--line);border-radius:11px;background:#fff;padding:12px 14px}
.tool strong{display:block;color:var(--navy);font-size:.9375rem;letter-spacing:-.02em}
.tool span{display:block;font-size:.75rem;color:var(--muted);margin-top:3px}

/* 07 live */
.agent-open{margin:0 0 6px}
.agent-primary{display:inline-flex;align-items:center;gap:9px;padding:11px 18px;border:1px solid var(--teal);border-radius:9px;background:var(--teal);color:#fff;font-size:.9375rem;font-weight:650;text-decoration:none}
.agent-primary::after{content:"→"}
.agent-primary:hover{background:#066a75;border-color:#066a75}

@media(min-width:900px){.shell{margin:20px auto;border:1px solid var(--line);border-radius:16px;overflow:clip}section{padding:36px 30px 44px}.masthead,.section-nav{padding-inline:30px}.closing{padding-inline:30px}h1,h2{font-size:2.25rem}}
@media(max-width:360px){section{padding-inline:15px}.masthead,.section-nav{padding-inline:15px}h1,h2{font-size:1.625rem}.dotgrid{grid-template-columns:repeat(25,1fr)}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}