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@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* Let each chapter end fully before the next one begins. The rule sits inside
   the pause instead of touching either chapter's content. */
.chapter{padding-top:195px;padding-bottom:175px}
.chapter-intro{margin-bottom:100px}
.reflection{padding-top:195px;padding-bottom:205px}
@media(max-width:720px){
  .chapter{padding-top:135px;padding-bottom:130px}
  .chapter-intro{margin-bottom:70px}
  .reflection{padding-top:145px;padding-bottom:160px}
}

/* TideBound: give the narrative bands a centered rhythm and let the original
   cards take up enough room to be read. Each tile reveals one card from its
   source contact sheet without the sheet's outside white canvas. */
.hero{padding-bottom:235px}
.contents{border-bottom:0}
.hero-description{line-height:1.65}
p{letter-spacing:.01em}
.chapter-intro p,.component-copy p,.mechanic-pair p,.balance p,.test-notes p,.prototype-story p,.reflection p,.context-strip p{line-height:1.65}
.loop li p,.flow-map small{line-height:1.55}
.design-question{border-left:3px solid var(--pink);padding-left:28px;margin-top:42px;max-width:700px}
.design-question .micro{display:block;color:var(--pink);margin-bottom:10px}
.design-question p{font-size:23px;line-height:1.42;font-weight:600}
#challenge{padding-bottom:0}
.context-strip{margin-top:0;min-height:345px;align-items:center;padding:65px 0}
#game{padding-bottom:0}
.component-story{display:block;margin-bottom:170px}
.component-copy{max-width:750px;margin-bottom:55px}
.component-copy p{max-width:680px}
.cards-figure{max-width:960px;margin-inline:auto}
.card-gallery{display:grid;gap:20px}
.card-row{display:grid;gap:18px;justify-content:center}
.card-row-three{grid-template-columns:repeat(3,minmax(0,1fr));width:calc(75% - 4.5px);margin-inline:auto}
.card-row-four{grid-template-columns:repeat(4,minmax(0,1fr))}
.card-row-two{grid-template-columns:repeat(2,minmax(0,1fr));width:66%;margin-inline:auto}
.card-tile{display:block;aspect-ratio:.64;border-radius:14px;overflow:hidden;mix-blend-mode:multiply;background-repeat:no-repeat;background-size:760% auto;background-position-x:calc(2.2% + var(--card)*15.95%);background-position-y:center}
.roles-gallery .card-tile{background-image:url('assets/tidebound/roles.avif')}
.events-gallery .card-tile{background-image:url('assets/tidebound/event-cards.avif')}
.consequences-gallery{max-width:760px;margin-inline:auto}
.mechanic-pair.reverse .cards-figure{max-width:760px}
.consequences-gallery .card-row-three{width:100%}
.consequences-gallery .card-row-two{width:calc(66.6667% - 6px)}
.consequences-gallery .card-tile{background-image:url('assets/tidebound/consequence-cards.avif');background-size:745% auto;background-position-x:calc(17.9% + var(--card)*16.1%)}
.cards-figure figcaption{margin-top:22px}
.loop{min-height:600px;padding:90px 0;display:flex;flex-direction:column;justify-content:center}
.mechanic-pair,.mechanic-pair.reverse{display:flex;flex-direction:column;align-items:stretch;gap:55px;margin-bottom:155px}
.mechanic-pair>div{order:0;max-width:710px}
.mechanic-pair figure{order:1;width:100%}
.balance{display:block;background:none;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);padding:70px 0 85px;margin-bottom:120px}
.balance>div:first-child{max-width:710px}
.balance-visual{display:block;height:95px;margin-top:65px;overflow:hidden;position:relative}
.balance-visual img{position:absolute;left:0;top:50%;width:100%;max-width:none;transform:translateY(-48%);mix-blend-mode:multiply}
#companion .chapter-intro{margin-bottom:180px}

@media(max-width:720px){
  .hero{padding-bottom:150px}
  .design-question{margin-top:34px;padding-left:20px}
  .design-question p{font-size:20px}
  .context-strip{min-height:0;padding:70px 0}
  .component-story{margin-bottom:115px}
  .component-copy{margin-bottom:45px}
  .card-gallery{gap:12px}
  .card-row{gap:8px}
  .card-row-three,.card-row-four,.card-row-two,.consequences-gallery .card-row-three,.consequences-gallery .card-row-two{grid-template-columns:repeat(2,minmax(0,1fr));width:100%}
  .card-row-three .card-tile:last-child{grid-column:1/-1;width:calc(50% - 4px);justify-self:center}
  .cards-figure figcaption{margin-top:14px}
  .loop{min-height:0;padding:90px 0}
  .mechanic-pair,.mechanic-pair.reverse{gap:40px;margin-bottom:115px}
  .mechanic-pair figure{margin-top:0}
  .balance{padding:45px 0 55px;margin-bottom:90px}
  .balance-visual{height:60px;margin-top:45px}
  .balance-visual img{width:100%;left:0}
  #companion .chapter-intro{margin-bottom:130px}
}

/* Reintroduce the original visual research and clarify the game sequence. */
.hero .hero-description:first-of-type{margin-top:28px}
.hero .hero-description+.hero-description{margin-top:20px}
#challenge{padding-bottom:145px}
#challenge .chapter-intro{margin-bottom:75px}
#challenge .principles{gap:22px;border:0}
#challenge .principles>div,#challenge .principles>div+div{padding:0;border:0}
#challenge .principles img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover;margin-bottom:22px}
#challenge .principles span{display:block;font-weight:600}
#challenge .principles p{font-size:18px;line-height:1.5;margin-top:12px}
.research-grid{margin-top:110px;display:grid;gap:95px}
.research-grid h3{font:700 clamp(27px,2.8vw,36px)/1.15 "Helvetica Neue",Helvetica,Arial,sans-serif;letter-spacing:-.035em;margin:0 0 28px}
.research-grid img{display:block;width:100%;height:auto}
.audience-figure img{max-width:1040px;margin-inline:auto}
.research-figure{display:grid;grid-template-columns:.7fr 1.3fr;column-gap:60px;align-items:start}
.research-figure h3{grid-column:1;grid-row:1}
.research-figure p{grid-column:1;grid-row:2;max-width:390px;font-size:18px;line-height:1.55}
.research-figure img{grid-column:2;grid-row:1/3}
#game .chapter-head,.mechanics-chapter .chapter-head{display:block}
#game .chapter-intro,.mechanics-chapter .chapter-intro{margin-left:0}
.mechanics-chapter .wide-figure{margin:0 0 25px}
.mechanics-chapter .loop{border-top:0}
@media(max-width:720px){
  #challenge{padding-bottom:100px}
  #challenge .chapter-intro{margin-bottom:55px}
  #challenge .principles{display:grid;grid-template-columns:1fr;gap:42px}
  #challenge .principles img{max-height:260px;margin-bottom:18px}
  #challenge .principles p{font-size:17px}
  .research-grid{margin-top:75px;gap:65px}
  .research-figure{display:block}
  .research-figure p{margin:0 0 25px}
  .research-grid h3{margin-bottom:18px}
  .mechanics-chapter .wide-figure{margin-bottom:0}
}

/* Final narrative and alignment adjustments. */
.hero{align-items:end}
.hero h1{letter-spacing:-.025em}
.contents{padding-top:105px}
#game .chapter-intro,.mechanics-chapter .chapter-intro{max-width:100%}
.research-grid img{mix-blend-mode:multiply}
.research-figure>div{grid-column:1;grid-row:1}
.research-figure h3{margin-bottom:14px}
.research-figure p{max-width:390px;font-size:18px;line-height:1.55}
.research-figure img{grid-column:2;grid-row:1}
.loop-heading,.loop-heading p,.balance>div:first-child,.mechanic-pair>div{max-width:none}
.loop ol{grid-template-columns:repeat(5,minmax(0,1fr))}
.loop{min-height:0;padding:95px 0 120px}
.mechanics-chapter .wide-figure{margin:0 0 105px}
.bridge{padding:130px 0 135px;border-bottom:1px solid var(--rule)}
.bridge h2{font:700 clamp(38px,4vw,52px)/1.1 "Helvetica Neue",Helvetica,Arial,sans-serif;letter-spacing:-.04em;margin-bottom:30px}
.bridge p{max-width:100%;line-height:1.65}
#companion .chapter-intro{margin-bottom:85px}
.companion-link{border-top:1px solid var(--rule);padding:65px 0 120px;display:grid;gap:22px}
.companion-link a{display:inline-block;width:fit-content;font:700 clamp(27px,3.2vw,43px)/1.18 "Helvetica Neue",Helvetica,Arial,sans-serif;letter-spacing:-.035em}
.companion-link a span{margin-left:12px}
@media(max-width:900px){.loop ol{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:720px){
  .hero{align-items:initial}
  .contents{padding-top:65px}
  .research-figure>div{margin-bottom:25px}
  .research-figure p{max-width:none}
  .loop{padding:75px 0 95px}
  .loop ol{grid-template-columns:repeat(2,minmax(0,1fr))}
  .mechanics-chapter .wide-figure{margin-bottom:80px}
  .bridge{padding:95px 0}
  .bridge h2{font-size:clamp(34px,8vw,45px)}
  #companion .chapter-intro{margin-bottom:65px}
  .companion-link{padding:55px 0 90px}
}
@media(max-width:390px){.loop ol{grid-template-columns:1fr}}

/* Facility explanation, closing gallery, and tighter rhythm around the loop. */
.mechanic-pair.reverse{margin-bottom:70px}
.loop{padding-top:35px;padding-bottom:165px}
.facility-story{padding-top:75px}
.facility-story h3{font:700 clamp(29px,3vw,39px)/1.17 "Helvetica Neue",Helvetica,Arial,sans-serif;letter-spacing:-.035em;margin-bottom:25px}
.facility-story p{max-width:100%;line-height:1.65}
.facility-types{margin-top:60px}
.facility-types img{display:block;width:100%;height:auto;mix-blend-mode:multiply}
#companion .companion-link{margin-top:95px;padding:55px 0 0}
.project-gallery{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;padding:90px 0 120px;border-bottom:1px solid var(--rule)}
.project-gallery figure{min-width:0;overflow:hidden}
.project-gallery .gallery-wide{grid-column:1/-1}
.project-gallery img{width:100%;height:100%;aspect-ratio:1.45;object-fit:cover}
.project-gallery .gallery-wide img{aspect-ratio:1.75}
.project-gallery figure:nth-last-child(2) img{aspect-ratio:1.2;object-fit:contain;background:#e8e8e8}
.project-gallery figure:last-child img{aspect-ratio:1.2}
@media(max-width:720px){
  .mechanic-pair.reverse{margin-bottom:55px}
  .loop{padding-top:25px;padding-bottom:105px}
  .facility-story{padding-top:55px}
  .facility-types{margin-top:38px;overflow-x:auto}
  .facility-types img{min-width:740px}
  #companion .companion-link{margin-top:70px;padding-top:45px}
  .project-gallery{gap:14px;padding:60px 0 80px}
  .project-gallery img{aspect-ratio:1.2}
  .project-gallery .gallery-wide img{aspect-ratio:1.35}
  .project-gallery figure:nth-last-child(2) img,.project-gallery figure:last-child img{aspect-ratio:.9}
}

/* Linked preview avoids loading the YouTube player until the viewer opens it. */
.video-intro{display:grid;grid-template-columns:minmax(0,.7fr) minmax(0,1.3fr);gap:clamp(36px,6vw,86px);align-items:center;padding:112px 0 42px}
.video-intro-copy .micro{color:var(--blue)}
.video-intro h2{font:700 clamp(34px,3.5vw,47px)/1.12 "Helvetica Neue",Helvetica,Arial,sans-serif;letter-spacing:-.04em;margin:22px 0 24px}
.video-intro-copy p{max-width:395px;line-height:1.65}
.video-intro-link{display:inline-flex;align-items:center;gap:20px;margin-top:35px;padding:0 0 12px;border-bottom:1px solid var(--rule);font-size:17px;font-weight:600;letter-spacing:.015em}
.video-intro-link:hover{text-decoration:none;color:var(--sea)}
.video-intro-preview{position:relative;display:block;overflow:hidden;aspect-ratio:1.55;background:#d5edf4}
.video-intro-preview img{width:100%;height:100%;object-fit:cover}
.video-play{position:absolute;left:50%;top:50%;width:76px;height:76px;border-radius:50%;background:var(--blue);color:#fff;display:grid;place-items:center;padding-left:5px;transform:translate(-50%,-50%);font:30px/1 Arial,sans-serif;box-shadow:0 8px 28px rgba(10,61,109,.22);transition:transform 220ms ease,background 220ms ease}
.video-intro-preview:hover .video-play,.video-intro-preview:focus-visible .video-play{transform:translate(-50%,-50%) scale(1.1);background:#147db6}
@media(max-width:720px){.video-intro{display:block;padding:78px 0 10px}.video-intro h2{font-size:clamp(32px,8vw,42px)}.video-intro-link{margin-top:25px}.video-intro-preview{margin-top:42px}.video-play{width:62px;height:62px;font-size:24px}}
@media(prefers-reduced-motion:reduce){.video-play{transition:none}}