/* V15 final-candidate shared polish */
.skip-link{position:fixed;left:1rem;top:-6rem;z-index:9999;padding:.65rem .85rem;background:#171816;color:#fff;text-decoration:none;border-radius:3px}.skip-link:focus{top:1rem}
.site-header nav{flex-wrap:wrap;justify-content:flex-end;align-items:center}.site-header nav a{white-space:nowrap}
a,button,input,summary{outline-offset:3px}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid #8c3c2c}
img{height:auto}.page-status{display:inline-block;padding:.25rem .45rem;border:1px solid currentColor;font-size:.55rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.final-footer{display:flex;justify-content:space-between;gap:1.5rem;flex-wrap:wrap}.final-footer a{text-decoration:none;border-bottom:1px solid rgba(120,112,100,.45)}
.project-live-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;border:1px solid var(--line);background:var(--line)}.project-live-card{padding:1.15rem;background:var(--paper);text-decoration:none}.project-live-card small,.project-live-card strong,.project-live-card span{display:block}.project-live-card small{font-size:.57rem;letter-spacing:.1em;color:var(--muted)}.project-live-card strong{margin:.35rem 0;font:500 1.2rem "Iowan Old Style",Baskerville,Georgia,serif}.project-live-card span{font-size:.72rem;color:var(--muted)}
.public-private-note{margin:1rem 0;padding:.85rem 1rem;border-left:3px solid var(--accent);background:rgba(140,60,44,.045);font-size:.72rem;color:var(--muted)}
@media(max-width:1050px){.site-header{align-items:flex-start}.site-header nav{max-width:75%}}
@media(max-width:760px){.site-header nav{max-width:none;justify-content:flex-start}.project-live-grid{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto!important}*,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}}
@media print{.site-header,.soundlab-banner,.nebula-gateway,.soundlab-hero-cta,audio,button{display:none!important}body{background:#fff;color:#000}main{width:100%}}


/* V17 — plain-language research rewrite */
.plain-box{margin:1.5rem 0;padding:1rem 1.1rem;border-left:3px solid var(--accent);background:rgba(255,255,255,.34)}
.plain-box strong{display:block;margin-bottom:.28rem;font:700 .78rem ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;letter-spacing:.02em}.plain-box p{margin:0!important;max-width:820px!important;font-size:.9rem!important;color:#363733}
.reader-questions{margin:2.3rem 0 1rem;border:1px solid var(--line);background:rgba(255,255,255,.22)}
.reader-questions>summary{cursor:pointer;list-style:none;padding:.9rem 1rem;font-weight:700;font-size:.78rem}.reader-questions>summary::-webkit-details-marker{display:none}.reader-questions>summary:after{content:"+";float:right;font-weight:400}.reader-questions[open]>summary:after{content:"−"}
.qa-list{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line)}.qa-list article{padding:1rem;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.qa-list article:nth-child(even){border-right:0}.qa-list h4{margin:0 0 .35rem!important;font-size:.86rem!important}.qa-list p{margin:0!important;font-size:.82rem!important;color:#4c4a45}
.receiver-explainer{display:grid;grid-template-columns:.9fr 1.1fr;gap:1px;margin:1.5rem 0 2.4rem;border:1px solid var(--line);background:var(--line)}
.room-schematic,.receiver-steps{background:rgba(255,255,255,.3)}.room-schematic{position:relative;min-height:250px;margin:0;padding:1rem;border:18px solid rgba(255,255,255,.3)}.room-schematic:after{content:"";position:absolute;inset:18px;border:1px solid #9e968a}.rs-source{position:absolute;left:20%;bottom:50%;width:15px;height:15px;border-radius:50%;background:var(--accent);z-index:2}.rs-source:after{content:"source";position:absolute;left:20px;top:-4px;font-size:.6rem;color:var(--muted)}.rs-seat{position:absolute;z-index:2;display:grid;place-items:center;width:30px;height:30px;border:1px solid #5c574f;border-radius:50%;background:var(--paper);font-size:.7rem}.rs-seat span{position:absolute;top:32px;white-space:nowrap;font-size:.52rem;color:var(--muted)}.rs-seat.a{left:33%;bottom:25%}.rs-seat.b{left:58%;bottom:50%}.rs-seat.c{left:82%;bottom:75%}.rs-label{position:absolute;left:28px;bottom:24px;font-size:.58rem;color:var(--muted);letter-spacing:.08em}
.receiver-steps{display:grid;align-content:center}.receiver-steps>div{display:grid;grid-template-columns:32px 1fr;gap:.65rem;padding:.82rem 1rem;border-bottom:1px solid var(--line)}.receiver-steps>div:last-child{border-bottom:0}.receiver-steps b,.mic-rules b{display:grid;place-items:center;width:24px;height:24px;border:1px solid var(--line);border-radius:50%;font-size:.64rem}.receiver-steps p,.mic-rules p{margin:0!important;font-size:.82rem!important}
.plain-compare{display:grid;grid-template-columns:1fr 1fr;gap:1px;margin:1.6rem 0 2.2rem;border:1px solid var(--line);background:var(--line)}.plain-compare>div{padding:1rem;background:rgba(255,255,255,.32)}.plain-compare span{font-size:.6rem;letter-spacing:.11em;color:var(--muted)}.plain-compare p{margin:.32rem 0 0!important;font-size:.83rem!important}
.pod-story{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;gap:.7rem;align-items:stretch;margin:1.8rem 0}.pod-stage{padding:1rem;border:1px solid var(--line);background:rgba(255,255,255,.3)}.pod-stage>span{display:grid;place-items:center;width:25px;height:25px;border:1px solid var(--line);border-radius:50%;font-size:.62rem;color:var(--muted)}.pod-stage>strong{display:block;margin:.55rem 0 .25rem;font:500 1rem "Iowan Old Style",Baskerville,Georgia,serif}.pod-stage>p{margin:0!important;font-size:.7rem!important;color:var(--muted)}.pod-arrow{align-self:center;color:var(--muted)}
.mini-fields,.basis-bars{display:grid;grid-template-columns:repeat(4,1fr);gap:4px;margin-top:.8rem}.mini-fields i{height:34px;border:1px solid rgba(60,55,48,.18);background:radial-gradient(circle at 25% 45%,rgba(140,60,44,.8),transparent 25%),radial-gradient(circle at 70% 60%,rgba(35,36,34,.55),transparent 30%),#d9d1c4}.mini-fields i:nth-child(2){background:radial-gradient(circle at 65% 30%,rgba(140,60,44,.75),transparent 23%),radial-gradient(circle at 30% 75%,rgba(35,36,34,.5),transparent 28%),#d9d1c4}.mini-fields i:nth-child(3){background:radial-gradient(circle at 45% 70%,rgba(140,60,44,.75),transparent 25%),radial-gradient(circle at 80% 25%,rgba(35,36,34,.5),transparent 25%),#d9d1c4}.mini-fields i:nth-child(4){background:radial-gradient(circle at 20% 25%,rgba(140,60,44,.75),transparent 22%),radial-gradient(circle at 65% 55%,rgba(35,36,34,.55),transparent 30%),#d9d1c4}.basis-bars i{height:34px;background:repeating-linear-gradient(90deg,#d9d1c4 0 9px,#6e655c 9px 14px,#d9d1c4 14px 23px)}.basis-bars i:nth-child(2){background:repeating-linear-gradient(0deg,#d9d1c4 0 8px,#8c3c2c 8px 12px,#d9d1c4 12px 21px)}.basis-bars i:nth-child(3){background:linear-gradient(135deg,#d9d1c4 0 35%,#6e655c 35% 48%,#d9d1c4 48% 68%,#8c3c2c 68% 78%,#d9d1c4 78%)}.basis-bars i:nth-child(4){background:radial-gradient(circle,#8c3c2c 0 20%,#d9d1c4 21% 44%,#6e655c 45% 56%,#d9d1c4 57%)}.coeffs{margin-top:.85rem;padding:.55rem;border:1px solid var(--line);text-align:center;font:500 .86rem "Cambria Math","Times New Roman",serif}
.mic-explainer{display:grid;grid-template-columns:1fr 1fr;gap:1px;margin:1.5rem 0 2rem;border:1px solid var(--line);background:var(--line)}.mic-room{position:relative;min-height:260px;background:rgba(255,255,255,.32);overflow:hidden}.mic-room:before{content:"";position:absolute;inset:24px;border:1px solid #9e968a}.mic{position:absolute;transform:translate(-50%,50%);display:grid;place-items:center;width:22px;height:22px;border-radius:50%;background:var(--accent);color:#fff;font-size:.58rem;z-index:2;box-shadow:0 0 0 3px var(--paper)}.mic-room-label{position:absolute;left:30px;bottom:28px;font-size:.58rem;letter-spacing:.07em;color:var(--muted)}.mic-rules{padding:.7rem 1rem;background:rgba(255,255,255,.32)}.mic-rules>div{display:grid;grid-template-columns:30px 1fr;gap:.6rem;align-items:center;padding:.55rem 0;border-bottom:1px solid rgba(100,92,82,.16)}.mic-rules .nested{margin:.8rem 0 0!important;text-align:center;font:500 1rem "Cambria Math","Times New Roman",serif!important;color:var(--accent)}
.rom-story{display:grid;grid-template-columns:1fr auto 1fr;gap:.8rem;align-items:center;margin:1.7rem 0 2rem}.rom-story>div{padding:1rem;border:1px solid var(--line);background:rgba(255,255,255,.3)}.rom-story>div span{font-size:.58rem;letter-spacing:.1em;color:var(--muted)}.rom-story>div strong{display:block;margin:.4rem 0;font:500 1.05rem "Iowan Old Style",Baskerville,Georgia,serif}.rom-story>div p{margin:0!important;font-size:.76rem!important}.rom-story>b{font-size:.68rem;font-weight:400;color:var(--muted);text-align:center}
.real-halls{margin:4rem 0 2.5rem;padding-top:2.4rem;border-top:1px solid var(--line)}.real-halls>h3{margin:0 0 .8rem!important}.real-halls>p{max-width:830px!important}.hall-grid{display:grid;grid-template-columns:1fr 1fr;gap:1px;margin:1.6rem 0;border:1px solid var(--line);background:var(--line)}.hall-card{display:grid;grid-template-columns:.72fr 1.28fr;background:var(--paper);min-height:310px}.hall-card>div:last-child{padding:1rem;border-left:1px solid var(--line)}.hall-card span{font-size:.55rem;letter-spacing:.1em;color:var(--muted)}.hall-card h4{margin:.35rem 0 .5rem!important;font-size:1.05rem!important}.hall-card p{margin:.45rem 0!important;font-size:.73rem!important;color:#47453f}.source-links{display:grid;gap:.3rem;margin-top:.8rem}.source-links a{font-size:.64rem;color:var(--accent);text-decoration:none;border-bottom:1px solid rgba(140,60,44,.2);width:max-content;max-width:100%}
.hall-shape{position:relative;min-height:100%;background:#e6ded1;overflow:hidden}.hall-shape.shoebox:before{content:"";position:absolute;inset:28px;border:1px solid #6f685f}.hall-stage{position:absolute;left:42%;top:29px;width:16%;height:38px;border:1px solid #6f685f;background:#cbbbaa;text-align:center;font-size:.55rem;padding-top:9px}.seat-dots{position:absolute;left:18%;right:18%;top:90px;bottom:28px;background-image:radial-gradient(circle,#6f685f 0 2px,transparent 2.5px);background-size:18px 18px}.vineyard .center-stage{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);display:grid;place-items:center;width:58px;height:58px;border:1px solid #6f685f;border-radius:50%;background:#cbbbaa;font-size:.55rem;z-index:2}.vineyard .terrace{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);border:8px dotted rgba(90,84,76,.65);border-radius:50%}.vineyard .t1{width:105px;height:105px}.vineyard .t2{width:150px;height:150px}.vineyard .t3{width:195px;height:195px}.vineyard .t4{width:240px;height:240px}.hall-metrics{padding:1rem 1.1rem;border:1px solid var(--line);background:rgba(255,255,255,.28)}.hall-metrics>strong{font-size:.78rem}.hall-metrics>div{display:flex;flex-wrap:wrap;gap:.45rem;margin:.7rem 0}.hall-metrics>div span{padding:.35rem .5rem;border:1px solid var(--line);font-size:.67rem}.hall-metrics>p{margin:0!important;font-size:.76rem!important;color:#4b4842}
@media(max-width:980px){.receiver-explainer,.mic-explainer,.hall-grid{grid-template-columns:1fr}.pod-story{grid-template-columns:1fr}.pod-arrow{justify-self:center;transform:rotate(90deg)}.rom-story{grid-template-columns:1fr}.rom-story>b{padding:.25rem 0}.qa-list{grid-template-columns:1fr}.qa-list article{border-right:0}.hall-card{grid-template-columns:1fr}.hall-shape{min-height:250px}.hall-card>div:last-child{border-left:0;border-top:1px solid var(--line)}}
@media(max-width:620px){.plain-compare{grid-template-columns:1fr}.receiver-explainer,.mic-explainer{display:block}.room-schematic,.mic-room{min-height:230px}.hall-card{display:block}}


/* ============================================================
   V18 — reader-first POD / ROM / real-hall refinement
   ============================================================ */

/* Featured case: history first, no floating metric block */
.beautiful-error-copy p{font-size:.86rem!important;line-height:1.55;max-width:760px!important}
.beautiful-error-copy em{margin-top:1rem!important;line-height:1.45}

/* POD: visual explanation before notation */
.pod-explain-v18{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr) auto minmax(0,1.08fr);gap:.72rem;align-items:stretch;margin:1.55rem 0}
.pod-panel{padding:1rem;border:1px solid var(--line);background:rgba(255,255,255,.34);min-height:230px}
.pod-panel .step-tag{display:block;color:var(--muted);font-size:.54rem;letter-spacing:.1em;margin-bottom:.55rem}.pod-panel>strong{display:block;font:500 1.03rem/1.2 "Iowan Old Style",Baskerville,Georgia,serif;margin-bottom:.38rem}.pod-panel>p{margin:0!important;color:#4d4a45;font-size:.73rem!important}.pod-big-arrow{align-self:center;color:var(--muted);font-size:1.25rem}
.snapshot-stack{position:relative;height:92px;margin-top:1rem}.snapshot-stack i{position:absolute;width:92px;height:62px;border:1px solid rgba(60,52,46,.35);box-shadow:0 7px 12px rgba(40,32,28,.08);background:radial-gradient(circle at 25% 45%,#e9a05f 0 9%,transparent 10%),radial-gradient(circle at 65% 55%,#6b3a88 0 13%,transparent 14%),linear-gradient(135deg,#1b1029,#3f1f59 42%,#c36f50 74%,#241334)}.snapshot-stack i:nth-child(1){left:8px;top:22px}.snapshot-stack i:nth-child(2){left:30px;top:15px;filter:hue-rotate(12deg)}.snapshot-stack i:nth-child(3){left:52px;top:8px;filter:hue-rotate(28deg)}.snapshot-stack i:nth-child(4){left:74px;top:1px;filter:hue-rotate(48deg)}
.pattern-row{display:grid;grid-template-columns:repeat(4,1fr);gap:.35rem;margin-top:1rem}.pattern-row i{height:74px;border:1px solid rgba(60,52,46,.28);background-color:#241532}.pattern-row .p1{background:radial-gradient(circle at 35% 35%,#f1a55d 0 12%,transparent 13%),linear-gradient(90deg,#22112d,#6b347a,#24152f)}.pattern-row .p2{background:radial-gradient(circle at 65% 62%,#db7b66 0 14%,transparent 15%),linear-gradient(140deg,#25132f,#3b6a75,#271633)}.pattern-row .p3{background:repeating-linear-gradient(90deg,#25132f 0 10px,#704477 10px 18px,#25132f 18px 30px)}.pattern-row .p4{background:radial-gradient(ellipse at 50% 50%,#9d5c85 0 18%,#2b1736 20% 40%,#5a2f69 41% 55%,#21112a 56%)}
.recipe-line{display:grid;gap:.3rem;margin:.95rem 0;padding:.72rem;border:1px solid var(--line);background:rgba(244,240,232,.8);font:500 .75rem "Cambria Math","Times New Roman",serif}.recipe-line b{font-weight:400;color:var(--muted)}
.pod-core-equation{display:grid;grid-template-columns:1fr auto 1fr;gap:.8rem;align-items:center;margin:1.25rem 0;padding:1rem;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.pod-core-equation>div{text-align:center}.pod-core-equation span{display:block;color:var(--muted);font-size:.56rem;letter-spacing:.09em;text-transform:uppercase}.pod-core-equation strong{display:block;margin-top:.25rem;font:500 1.05rem "Iowan Old Style",Baskerville,Georgia,serif}.pod-core-equation>b{color:var(--accent);font-size:1.2rem}.equation-translation{max-width:900px!important;margin:-.2rem auto 1.6rem!important;padding:.85rem 1rem;border-left:3px solid var(--accent);background:rgba(255,255,255,.28);font-size:.82rem!important;line-height:1.55}
.qa-list-single{grid-template-columns:1fr}.qa-list-single article{border-right:0!important}.compact-eq{margin:.55rem 0!important;padding:.55rem!important;font-size:.88rem!important}

/* Reconstruction pipeline */
.reconstruction-story{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;gap:.7rem;align-items:stretch;margin:1.4rem 0}.reconstruction-story>div{padding:1rem;border:1px solid var(--line);background:rgba(255,255,255,.3)}.reconstruction-story>div span{font-size:.55rem;letter-spacing:.09em;color:var(--muted)}.reconstruction-story>div strong{display:block;margin:.4rem 0;font:500 1rem "Iowan Old Style",Baskerville,Georgia,serif}.reconstruction-story>div p{margin:0!important;font-size:.72rem!important;color:#4b4944}.reconstruction-story>b{align-self:center;color:var(--muted);font-weight:400}

/* Two uses of the same POD basis */
.pod-two-uses{display:grid;grid-template-columns:1fr 1fr;gap:1px;margin:1.5rem 0;background:var(--line);border:1px solid var(--line)}.pod-two-uses>div{padding:1rem;background:var(--paper)}.pod-two-uses span{font-size:.55rem;letter-spacing:.1em;color:var(--muted)}.pod-two-uses strong{display:block;margin:.4rem 0;font:500 1.02rem "Iowan Old Style",Baskerville,Georgia,serif}.pod-two-uses p{margin:0!important;font-size:.72rem!important;color:#4a4843}.rom-story-v18>b{max-width:190px;line-height:1.4}

/* Real halls: explain the contrast before jargon */
.hall-why{margin:1.35rem 0;padding:1rem 1.1rem;border-left:3px solid #6f655c;background:rgba(255,255,255,.3)}.hall-why strong{display:block;margin-bottom:.3rem;font:.7rem ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;letter-spacing:.02em}.hall-why p{margin:0!important;max-width:1050px!important;font-size:.8rem!important;line-height:1.55}.hall-grid-v18{grid-template-columns:1fr 1fr}.hall-card-v18{grid-template-columns:.66fr 1.34fr;min-height:390px}.hall-card-v18 p{font-size:.73rem!important;line-height:1.5}.hall-contrast{display:grid;grid-template-columns:1fr 1fr;gap:1px;margin-top:1px;border:1px solid var(--line);background:var(--line)}.hall-contrast>div{padding:1rem;background:rgba(255,255,255,.28)}.hall-contrast span{font-size:.55rem;letter-spacing:.1em;color:var(--muted)}.hall-contrast strong{display:block;margin:.4rem 0;font:500 1rem "Iowan Old Style",Baskerville,Georgia,serif}.hall-contrast p{margin:0!important;font-size:.7rem!important;color:#4e4b45}.metric-plain-grid{display:grid!important;grid-template-columns:repeat(4,1fr)!important;gap:1px!important;margin:1rem 0!important;background:var(--line)!important}.metric-plain-grid span{display:block!important;padding:.8rem!important;background:var(--paper)!important}.metric-plain-grid b{display:block!important;margin:0 0 .25rem!important;font:.75rem ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif!important}.metric-plain-grid small{display:block;color:var(--muted);font-size:.58rem;line-height:1.35}.hall-metrics-v18>p{max-width:900px!important}

@media(max-width:1100px){.pod-explain-v18{grid-template-columns:1fr}.pod-big-arrow{justify-self:center;transform:rotate(90deg)}.reconstruction-story{grid-template-columns:1fr}.reconstruction-story>b{justify-self:center;transform:rotate(90deg)}.hall-grid-v18{grid-template-columns:1fr}.metric-plain-grid{grid-template-columns:1fr 1fr!important}}
@media(max-width:720px){.pod-core-equation,.pod-two-uses,.hall-contrast{grid-template-columns:1fr}.pod-core-equation>b{transform:rotate(90deg)}.metric-plain-grid{grid-template-columns:1fr!important}.hall-card-v18{display:block}.pattern-row{grid-template-columns:1fr 1fr}}