/* ==========================================================================
   YOUSSEF SHAHEEN — PORTFOLIO
   Token system
   ========================================================================== */

:root{
  /* Night palette (default) */
  --bg: #0B101A;
  --bg-2: #131a28;
  --surface: #171f2f;
  --atmo: #211D31;
  --indigo: #6664b8;
  --indigo-dim: #3C3B72;
  --dust: #9a7f9f;
  --terracotta: #c98268;
  --teal: #7fb0ad;
  --ink: #EDE8DD;
  --ink-dim: #b7b0c4;
  --ink-faint: #756f85;
  --line: rgba(237,232,221,0.14);
  --line-soft: rgba(237,232,221,0.07);
  --stars-opacity: 1;
  --env-glow-opacity: 0.55;

  /* type */
  --f-display: "Syne", sans-serif;
  --f-body: "M PLUS Rounded 1c", sans-serif;
  --f-mono: "IBM Plex Mono", monospace;

  --container: 1320px;
  --edge: clamp(20px, 5vw, 64px);

  --ease: cubic-bezier(.22,.85,.32,1);
  --ease-soft: cubic-bezier(.4,.0,.2,1);
}

html[data-theme="day"]{
  --bg: #E8DED2;
  --bg-2: #ddd0bc;
  --surface: #f2ece1;
  --atmo: #9DB9C4;
  --indigo: #3C3B72;
  --indigo-dim: #6b699e;
  --dust: #66516B;
  --terracotta: #9C5D4B;
  --teal: #4E7775;
  --ink: #211D31;
  --ink-dim: #4a4458;
  --ink-faint: #7c7488;
  --line: rgba(33,29,49,0.14);
  --line-soft: rgba(33,29,49,0.07);
  --stars-opacity: 0;
  --env-glow-opacity: 0.35;
}

@media (prefers-reduced-motion: reduce){
  *, *::before, *::after{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background .6s var(--ease-soft), color .6s var(--ease-soft);
}
img{ max-width:100%; display:block; }
a{ color: inherit; text-decoration: none; }
ul{ list-style:none; margin:0; padding:0; }
button{ font-family: inherit; background:none; border:none; color:inherit; cursor:pointer; padding:0; }
h1,h2,h3{ font-family: var(--f-display); font-weight:700; margin:0; }
p{ margin:0; }

.route{ display:none; position:relative; z-index:2; }
.route.is-active{ display:block; }
body[data-route^="project"] .route[data-route="work"]{ display:none; }

/* ==========================================================================
   CELESTIAL ENVIRONMENT
   ========================================================================== */
.env{
  position: fixed; inset:0; z-index:0; pointer-events:none; overflow:hidden;
}
.env-glow{
  position:absolute; border-radius:50%; filter: blur(90px);
  opacity: var(--env-glow-opacity);
  transition: opacity .8s var(--ease-soft), background .8s var(--ease-soft);
  will-change: transform;
}
.env-glow--a{ width:56vw; height:56vw; top:-18vw; right:-12vw; background: radial-gradient(circle, var(--indigo-dim), transparent 70%); animation: driftA 46s ease-in-out infinite; }
.env-glow--b{ width:46vw; height:46vw; bottom:-16vw; left:-10vw; background: radial-gradient(circle, var(--dust), transparent 70%); opacity: calc(var(--env-glow-opacity) * 0.7); animation: driftB 58s ease-in-out infinite; }
.env-glow--c{ width:30vw; height:30vw; top:40%; left:60%; background: radial-gradient(circle, var(--terracotta), transparent 72%); opacity: calc(var(--env-glow-opacity) * 0.45); animation: driftC 40s ease-in-out infinite; }

@keyframes driftA{ 0%,100%{ transform:translate(0,0) } 50%{ transform:translate(-3%,4%) } }
@keyframes driftB{ 0%,100%{ transform:translate(0,0) } 50%{ transform:translate(4%,-3%) } }
@keyframes driftC{ 0%,100%{ transform:translate(0,0) scale(1) } 50%{ transform:translate(-4%,-5%) scale(1.08) } }

.env-stars{
  position:absolute; inset:0;
  opacity: var(--stars-opacity);
  transition: opacity .8s var(--ease-soft);
}
.env-stars span{
  position:absolute; width:2px; height:2px; border-radius:50%;
  background: var(--ink);
  animation: twinkle 5s ease-in-out infinite;
}
@keyframes twinkle{ 0%,100%{ opacity:.15 } 50%{ opacity:.9 } }

.env-orbits{ position:absolute; inset:0; width:100%; height:100%; opacity:.35; }
.orbit-path{ fill:none; stroke: var(--line); stroke-width:1; }
.orbit-path--soft{ opacity:.6; }

/* ==========================================================================
   TOP BAR
   ========================================================================== */
.topbar{
  position: fixed; top:0; left:0; right:0; z-index:40;
  display:flex; align-items:center; justify-content:space-between;
  padding: 22px var(--edge);
  pointer-events:none;
}
.topbar > *{ pointer-events:auto; }
.wordmark{ display:flex; align-items:baseline; gap:10px; font-family: var(--f-mono); font-size:13px; letter-spacing:.06em; }
.wordmark-initial{
  display:inline-flex; align-items:center; justify-content:center;
  width:34px; height:34px; border-radius:50%;
  border:1px solid var(--line); font-family:var(--f-display); font-weight:700; font-size:13px;
  transition: border-color .4s var(--ease-soft), transform .4s var(--ease-soft);
}
.wordmark:hover .wordmark-initial{ border-color: var(--terracotta); transform: rotate(-8deg); }
.wordmark-full{ opacity:.7; }
@media (max-width: 720px){ .wordmark-full{ display:none; } }

.theme-toggle{ display:flex; align-items:center; }
.theme-toggle-track{
  width:52px; height:28px; border-radius:20px; border:1px solid var(--line);
  display:flex; align-items:center; padding:3px; position:relative;
  transition: border-color .4s;
}
.theme-toggle-orb{
  width:20px; height:20px; border-radius:50%; background: var(--ink);
  color: var(--bg);
  display:flex; align-items:center; justify-content:center;
  transform: translateX(0); transition: transform .5s var(--ease), background .5s;
}
html[data-theme="day"] .theme-toggle-orb{ transform: translateX(24px); background: var(--terracotta); color: var(--bg); }
.theme-toggle-orb svg{ width:13px; height:13px; }
.icon-moon{ display:block; }
.icon-sun{ display:none; }
html[data-theme="day"] .icon-moon{ display:none; }
html[data-theme="day"] .icon-sun{ display:block; }

/* ==========================================================================
   ORBITAL NAV CONTROL
   ========================================================================== */
.orbit-control{ position:fixed; right: var(--edge); bottom: var(--edge); z-index:50; }
.orbit-trigger{
  position:relative; width:58px; height:58px; display:flex; align-items:center; justify-content:center;
}
.orbit-trigger-ring{
  position:absolute; inset:0; border-radius:50%; border:1px solid var(--line);
  transition: transform .5s var(--ease), border-color .4s;
  display:flex; align-items:center; justify-content:center;
}
.orbit-trigger:hover .orbit-trigger-ring{ transform:scale(1.12); border-color: var(--terracotta); }
.orbit-trigger-ring::after{
  content:''; font-size:15px; line-height:1; color: var(--ink-dim);
  opacity:0; transform: scale(.6) rotate(-45deg); transition: opacity .3s var(--ease-soft), transform .4s var(--ease);
}
.orbit-control.is-open .orbit-trigger-ring::after{ content:'\2715'; opacity:1; transform: scale(1) rotate(0deg); }
.orbit-trigger-dot{
  width:9px; height:9px; border-radius:50%; background: var(--terracotta);
  box-shadow: 0 0 0 6px rgba(201,130,104,0.12);
  transition: transform .5s var(--ease), opacity .3s;
}
.orbit-control.is-open .orbit-trigger-dot{ transform: scale(0); opacity:0; }

.orbit-menu{
  position:absolute; bottom: 74px; right:0;
  width: 264px;
  background: var(--surface);
  border:1px solid var(--line);
  border-radius: 18px;
  padding: 22px;
  display:flex; flex-direction:column; gap:6px;
  opacity:0; transform: translateY(14px) scale(.97);
  pointer-events:none;
  transition: opacity .35s var(--ease-soft), transform .4s var(--ease);
  box-shadow: 0 30px 60px -20px rgba(0,0,0,.5);
}
.orbit-control.is-open .orbit-menu{ opacity:1; transform: translateY(0) scale(1); pointer-events:auto; }
.orbit-menu-label{
  font-family: var(--f-mono); font-size:10.5px; letter-spacing:.14em; text-transform:uppercase;
  color: var(--ink-faint); margin: 4px 0 2px;
}
.orbit-link{
  display:flex; align-items:center; gap:10px;
  padding: 9px 6px; border-radius:8px;
  font-family: var(--f-display); font-weight:600; font-size:16px;
  transition: color .25s, transform .25s var(--ease);
}
.orbit-link-num{ font-family: var(--f-mono); font-size:11px; color: var(--ink-faint); font-weight:400; }
.orbit-link:hover{ color: var(--terracotta); transform: translateX(3px); }
.orbit-socials{ margin-top:8px; padding-top:12px; border-top:1px solid var(--line-soft); }
.orbit-social-row{ display:flex; flex-wrap:wrap; gap:8px; }
.orbit-social-row a{
  font-family: var(--f-mono); font-size:11.5px; padding:5px 10px; border:1px solid var(--line); border-radius:20px;
  transition: border-color .25s, color .25s;
}
.orbit-social-row a:hover{ border-color: var(--terracotta); color: var(--terracotta); }
.orbit-social-row a[aria-disabled="true"],
.contact-channel[aria-disabled="true"]{ opacity:.4; pointer-events:none; }
.orbit-cta{
  margin-top:14px; display:flex; align-items:center; justify-content:space-between;
  padding:11px 14px; border-radius:10px; background: var(--terracotta); color:#191014;
  font-family: var(--f-mono); font-size:12px; letter-spacing:.04em;
  transition: transform .3s var(--ease), filter .3s;
}
.orbit-cta:hover{ transform: translateX(2px); filter:brightness(1.08); }
.orbit-cta svg{ width:15px; height:15px; }

/* ==========================================================================
   HOME
   ========================================================================== */
#route-home{
  min-height: 100svh;
  position:relative;
  padding: 120px var(--edge) 80px;
}
#route-home.is-active{ display:flex; flex-direction:column; justify-content:center; }

.home-system{ position:absolute; inset:0; z-index:1; pointer-events:none; opacity:0; transition: opacity .6s var(--ease-soft); }
body[data-stage="system"] .home-system,
body[data-stage="reveal"] .home-system{ opacity:1; }
.sys-coord{ position:absolute; font-family: var(--f-mono); font-size:11px; letter-spacing:.08em; color: var(--ink-faint); }
.sys-coord--1{ top:18%; left:8%; }
.sys-coord--2{ bottom:20%; right:9%; }
.sys-rule{ position:absolute; background: var(--line); }
.sys-rule--1{ top:0; bottom:0; left:6%; width:1px; }
.sys-rule--2{ top:0; bottom:0; right:6%; width:1px; }
.sys-tag{ position:absolute; bottom:8%; left:50%; transform:translateX(-50%); font-family:var(--f-mono); font-size:10.5px; letter-spacing:.18em; color:var(--ink-faint); white-space:nowrap; }

.home-reveal{
  position:relative; z-index:2;
  display:grid; grid-template-columns: minmax(220px,360px) 1fr; gap: clamp(32px,6vw,90px);
  align-items:center; max-width: var(--container); margin:0 auto; width:100%;
}
.home-portrait{
  opacity:0; transform: translateY(28px) scale(.97);
  transition: opacity 1s var(--ease-soft), transform 1s var(--ease);
  border-radius: 10px; overflow:hidden;
  aspect-ratio: 853/1280;
  box-shadow: 0 50px 90px -30px rgba(0,0,0,.6);
}
body[data-stage="reveal"] .home-portrait{ opacity:1; transform: translateY(0) scale(1); }
.home-portrait img{ width:100%; height:100%; object-fit:cover; }

.home-copy > *{ opacity:0; transform: translateY(16px); transition: opacity .8s var(--ease-soft), transform .8s var(--ease); }
body[data-stage="reveal"] .home-copy > *{ opacity:1; transform: translateY(0); }
.home-copy > *:nth-child(1){ transition-delay: .15s; }
.home-copy > *:nth-child(2){ transition-delay: .28s; }
.home-copy > *:nth-child(3){ transition-delay: .42s; }
.home-copy > *:nth-child(4){ transition-delay: .54s; }
.home-copy > *:nth-child(5){ transition-delay: .66s; }

.home-kicker{ font-family: var(--f-mono); font-size:13px; letter-spacing:.1em; color: var(--terracotta); margin-bottom:18px; }
.home-name{ font-size: clamp(52px, 8.4vw, 118px); line-height:.94; letter-spacing:-.02em; margin-bottom:26px; }
.home-statement{ font-size: clamp(17px,2vw,22px); color: var(--ink-dim); max-width:30ch; line-height:1.5; margin-bottom:14px; }
.home-philosophy{ font-family: var(--f-mono); font-size:12.5px; letter-spacing:.1em; color: var(--ink-faint); text-transform:uppercase; margin-bottom:34px; }
.home-enter{
  display:inline-flex; align-items:center; gap:10px;
  font-family: var(--f-display); font-weight:600; font-size:15px;
  padding-bottom:4px; border-bottom:1px solid var(--line);
  transition: border-color .3s, gap .3s var(--ease), color .3s;
}
.home-enter svg{ width:17px; height:17px; transition: transform .3s var(--ease); }
.home-enter:hover{ border-color: var(--terracotta); color: var(--terracotta); gap:16px; }

.scroll-cue{ position:absolute; bottom:32px; left:50%; transform:translateX(-50%); z-index:2; opacity:0; transition:opacity 1s .9s; }
body[data-stage="reveal"] .scroll-cue{ opacity:.5; }
.scroll-cue span{ display:block; width:1px; height:34px; background: linear-gradient(var(--ink), transparent); animation: scrollcue 2s ease-in-out infinite; }
@keyframes scrollcue{ 0%{ transform:scaleY(0); transform-origin:top; } 45%{ transform:scaleY(1); transform-origin:top; } 55%{ transform:scaleY(1); transform-origin:bottom; } 100%{ transform:scaleY(0); transform-origin:bottom; } }

@media (max-width: 860px){
  #route-home{ padding-top:110px; }
  .home-reveal{ grid-template-columns: 1fr; gap:36px; text-align:left; }
  .home-portrait{ max-width:220px; }
  .home-system{ display:none; }
}

/* ==========================================================================
   SHARED SECTION HEAD / GENERIC
   ========================================================================== */
main{ position:relative; z-index:2; }
.section-head{ max-width: var(--container); margin: 0 auto; padding: 150px var(--edge) 50px; }
.section-eyebrow{ display:block; font-family: var(--f-mono); font-size:12.5px; letter-spacing:.12em; color: var(--terracotta); text-transform:uppercase; margin-bottom:18px; }
.section-title{ font-size: clamp(34px,5vw,58px); letter-spacing:-.01em; margin-bottom:14px; }
.section-lede{ font-size:17px; color: var(--ink-dim); max-width:52ch; }

/* ==========================================================================
   WORK INDEX
   ========================================================================== */
.index-list{ max-width: var(--container); margin: 0 auto; padding: 0 var(--edge) 140px; border-top:1px solid var(--line); }
.index-row{
  position:relative;
  display:grid; grid-template-columns: 56px 1fr auto 32px; gap:28px; align-items:center;
  padding: 40px 0; border-bottom:1px solid var(--line);
  transition: padding-left .4s var(--ease);
}
.index-row:not(.index-row--future):hover{ padding-left:14px; }
.index-num{ font-family: var(--f-mono); font-size:14px; color: var(--ink-faint); }
.index-title{ display:block; font-family:var(--f-display); font-weight:700; font-size: clamp(24px,3.4vw,40px); margin-bottom:8px; transition: color .3s; }
.index-row:not(.index-row--future):hover .index-title{ color: var(--terracotta); }
.index-desc{ display:block; color: var(--ink-dim); max-width:48ch; font-size:15px; }
.index-meta{ display:flex; flex-direction:column; gap:4px; text-align:right; font-family: var(--f-mono); font-size:12px; color: var(--ink-faint); }
.index-arrow svg{ width:20px; height:20px; transition: transform .35s var(--ease); }
.index-row:not(.index-row--future):hover .index-arrow svg{ transform: translateX(6px); }
.index-title--muted, .index-desc--muted{ color: var(--ink-faint); }
.index-row--future{ cursor:default; opacity:.5; }

.index-row::after{
  content:''; position:absolute; top:50%; right:100px; transform: translateY(-50%) scale(.92);
  width:190px; height:240px; border-radius:10px;
  background-image: var(--preview); background-size:contain; background-repeat:no-repeat; background-position:center;
  background-color: var(--surface);
  opacity:0; pointer-events:none; box-shadow: 0 30px 60px -18px rgba(0,0,0,.55);
  transition: opacity .35s var(--ease-soft), transform .4s var(--ease);
  border:1px solid var(--line);
}
.index-row:hover::after{ opacity:1; transform: translateY(-50%) scale(1); }
@media (max-width: 720px){
  .index-row{ grid-template-columns: 36px 1fr; row-gap:10px; }
  .index-meta, .index-arrow{ display:none; }
  .index-row::after{ display:none; }
}

/* ==========================================================================
   DELIVERY BAG — CASE STUDY
   ========================================================================== */
#route-project-delivery-bag{ padding-bottom: 60px; }

.chapter-num{ font-family: var(--f-mono); font-size:13px; color: var(--ink-faint); }
.chapter-label{ display:block; font-family: var(--f-mono); font-size:12px; letter-spacing:.1em; text-transform:uppercase; color: var(--terracotta); margin-bottom:14px; }
.chapter-label--light{ color: #e9b79f; }
.chapter-title{ font-size: clamp(24px,3vw,36px); line-height:1.15; margin-bottom:16px; }
.chapter-body{ color: var(--ink-dim); font-size:16px; max-width:50ch; line-height:1.65; }
.chapter-taglist{ display:flex; flex-wrap:wrap; gap:8px; margin-top:20px; }
.chapter-taglist li{ font-family:var(--f-mono); font-size:11.5px; padding:6px 12px; border:1px solid var(--line); border-radius:20px; color: var(--ink-dim); }

.chapter--hero{
  position:relative; min-height:100svh; display:flex; align-items:flex-end;
  padding: 140px var(--edge) 70px;
}
.chapter-hero-media{ position:absolute; inset:0; z-index:0; background: var(--bg); }
.chapter-hero-media video{ width:100%; height:100%; object-fit:cover; display:block; }
.chapter-hero-media::after{ content:''; position:absolute; inset:0; background: linear-gradient(180deg, rgba(11,16,26,.15) 0%, rgba(11,16,26,.15) 40%, rgba(11,16,26,.92) 100%); }
html[data-theme="day"] .chapter-hero-media::after{ background: linear-gradient(180deg, rgba(232,222,210,.1) 0%, rgba(232,222,210,.15) 40%, rgba(232,222,210,.92) 100%); }
.chapter-hero-copy{ position:relative; z-index:1; max-width: var(--container); margin:0 auto; width:100%; color:#EDE8DD; }
.chapter-eyebrow{ display:block; font-family:var(--f-mono); font-size:12px; letter-spacing:.14em; text-transform:uppercase; opacity:.75; margin-bottom:18px; }
.chapter-hero-title{ font-size: clamp(54px,10vw,124px); line-height:.92; letter-spacing:-.02em; margin-bottom:20px; }
.chapter-hero-sub{ font-size: clamp(16px,1.8vw,20px); max-width:44ch; opacity:.85; margin-bottom:22px; }
.chapter-hero-meta{ display:flex; gap:18px; font-family:var(--f-mono); font-size:12px; opacity:.7; }

.chapter--split{
  max-width: var(--container); margin: 0 auto; padding: 78px var(--edge);
  display:grid; grid-template-columns: 56px minmax(280px,420px) 1fr; gap:40px; align-items:start;
}
.chapter--split.chapter--reverse{ grid-template-columns: 56px 1fr minmax(280px,420px); }
.chapter--reverse .chapter-text{ order:2; }
.chapter--reverse .chapter-media{ order:1; }
.chapter-media img{ border-radius:10px; width:100%; border:1px solid var(--line-soft); }
.chapter-media--tall img{ }
.chapter-opportunity{ margin-top:26px; padding-top:22px; border-top:1px solid var(--line); }
.chapter-opportunity-label{ display:block; font-family:var(--f-mono); font-size:11px; letter-spacing:.08em; text-transform:uppercase; color: var(--ink-faint); margin-bottom:12px; }
.chapter-opportunity-grid{ display:grid; grid-template-columns: 1fr 1fr; gap:10px 18px; font-size:14.5px; color: var(--ink); }
.chapter-materiallist{ display:flex; flex-direction:column; gap:12px; margin-top:22px; padding-top:20px; border-top:1px solid var(--line); }
.chapter-materiallist div{ display:flex; justify-content:space-between; gap:16px; font-size:14.5px; border-bottom:1px dashed var(--line-soft); padding-bottom:10px; }
.chapter-materiallist span{ font-family:var(--f-mono); font-size:11px; letter-spacing:.06em; text-transform:uppercase; color: var(--ink-faint); }

@media (max-width: 900px){
  .chapter--split, .chapter--split.chapter--reverse{ grid-template-columns: 1fr; gap:20px; padding: 70px var(--edge); }
  .chapter--reverse .chapter-text, .chapter--reverse .chapter-media{ order:0; }
}

.chapter--full{ max-width: var(--container); margin:0 auto; padding: 78px var(--edge); }
.chapter-full-head{ display:grid; grid-template-columns:56px 1fr; gap:30px; margin-bottom:44px; max-width:900px; }
.chapter-media--wide img{ border-radius:12px; width:100%; border:1px solid var(--line-soft); }

.chapter--finalhero{ position:relative; min-height:92svh; display:flex; align-items:flex-end; overflow:hidden; }
.chapter--finalhero img{ position:absolute; inset:0; width:100%; height:100%; object-fit:cover; z-index:0; }
.chapter--finalhero::after{ content:''; position:absolute; inset:0; background: linear-gradient(0deg, rgba(0,0,0,.72), transparent 55%); z-index:0; }
.chapter-finalhero-copy{ position:relative; z-index:1; padding: 0 var(--edge) 70px; color:#EDE8DD; }
.chapter-finalhero-title{ font-size: clamp(40px,7vw,84px); line-height:1; letter-spacing:-.01em; }

.chapter--video{ max-width: var(--container); margin:0 auto; padding: 78px var(--edge); display:grid; grid-template-columns:56px 1fr; gap:30px; align-items:start; }
.chapter-video-copy{ grid-column: 2; max-width:520px; margin-bottom:30px; }
.chapter-video-frame{ grid-column:1 / -1; display:flex; justify-content:center; }
.chapter-video-frame video{ width:100%; max-width:340px; border-radius:16px; border:1px solid var(--line); background:#000; aspect-ratio: 9/16; object-fit:cover; box-shadow: 0 40px 80px -30px rgba(0,0,0,.6); }
.chapter-video-frame--process video{ max-width:300px; }

.chapter--process{ max-width: var(--container); margin: 0 auto 40px; padding: 0 var(--edge); }
.process-toggle{
  width:100%; display:flex; align-items:center; justify-content:space-between;
  padding: 30px 0; border-top:1px solid var(--line); border-bottom:1px solid var(--line);
  text-align:left;
}
.process-toggle-title{ display:block; font-family: var(--f-display); font-weight:700; font-size: clamp(20px,2.6vw,28px); margin-top:4px; }
.process-toggle-right{ display:flex; align-items:center; gap:14px; font-family:var(--f-mono); font-size:12px; color: var(--ink-faint); }
.process-toggle-right svg{ width:18px; height:18px; transition: transform .4s var(--ease); }
.chapter--process.is-open .process-toggle-right svg{ transform: rotate(180deg); }
.process-body{
  max-height:0; overflow:hidden; transition: max-height .5s var(--ease-soft);
}
.chapter--process.is-open .process-body{ max-height: 900px; }
.process-body > *{ padding-top:30px; }
.process-body .chapter-video-frame{ padding-top:24px; padding-bottom:44px; justify-content:flex-start; }

.chapter-nextproject{ max-width: var(--container); margin:0 auto; padding: 40px var(--edge) 0; }
.chapter-nextproject a{ display:inline-flex; align-items:center; gap:10px; font-family:var(--f-mono); font-size:13px; color: var(--ink-faint); transition:color .3s; }
.chapter-nextproject a:hover{ color: var(--terracotta); }
.chapter-nextproject svg{ width:15px; height:15px; transform: rotate(180deg); }

/* ==========================================================================
   STAGE — shared shell for the 4 big case-study chapters (Problem, Concept,
   System Logic, User Scenarios)
   ========================================================================== */
.stage{ max-width: var(--container); margin:0 auto; padding: 78px var(--edge) 60px; }
.stage-intro{ max-width: 640px; margin-bottom: 56px; }
.stage-intro .chapter-num{ display:block; margin-bottom: 10px; }
.stage-intro .chapter-label{ margin-bottom: 18px; }
.stage-title{ font-size: clamp(32px,4.6vw,54px); line-height:1.08; letter-spacing:-.01em; margin-bottom:22px; }
.stage-statement{ font-size: clamp(18px,2vw,22px); line-height:1.5; color: var(--ink); margin-bottom:14px; max-width:52ch; }
.stage-lede{ color: var(--ink-dim); font-size:15.5px; max-width:56ch; }
.chapter--tight{ padding-top:0 !important; }
.chapter--tight.chapter--split, .chapter--tight.chapter--split.chapter--reverse{ padding-top:46px; }

/* ---------- Problem Analysis blocks ----------
   Two independent columns (.problem-visual / .problem-copy) so a tall
   hero image never stretches the text column's row height. */
.problem-block{
  display:flex;
  gap: 56px;
  margin-bottom: 84px;
  align-items:flex-start;
}
.problem-block--reverse{ flex-direction: row-reverse; }
.problem-visual{ flex: 0 0 46%; display:flex; flex-direction:column; gap:22px; }
.problem-copy{ flex: 1 1 auto; padding-top: 10px; min-width:0; }

.problem-hero{ border-radius:12px; overflow:hidden; border:1px solid var(--line-soft); }
.problem-hero img{ width:100%; display:block; }
.problem-hero--reveal img, .problem-hero--action img{ aspect-ratio: 4/3; object-fit:cover; }
.problem-title{ font-family: var(--f-display); font-weight:700; font-size: clamp(22px,2.6vw,30px); line-height:1.2; margin: 14px 0 16px; }
.problem-observations{ display:flex; flex-direction:column; gap:16px; margin-top:24px; }
.problem-observations > div{ display:flex; gap:14px; }
.problem-observations span{ font-family:var(--f-mono); font-size:11px; color: var(--terracotta); padding-top:3px; flex-shrink:0; }
.problem-observations strong{ display:block; font-family:var(--f-display); font-size:15px; font-weight:700; margin-bottom:4px; }
.problem-observations p{ color: var(--ink-dim); font-size:14px; line-height:1.5; max-width:42ch; }
.problem-support{ max-width:78%; align-self:flex-end; }
.problem-support img{ width:100%; border-radius:10px; border:1px solid var(--line-soft); }
.problem-support-cap{ display:block; margin-top:10px; font-size:13px; color: var(--ink-faint); max-width:36ch; }
.problem-support--wide{ max-width:100%; align-self:stretch; }
.problem-support--food{ max-width:60%; }
.problem-chain{
  display:flex; flex-wrap:wrap; align-items:center; gap:10px;
  font-family:var(--f-mono); font-size:12px; color: var(--ink-faint);
  margin-top:30px; padding-top:18px; border-top:1px solid var(--line-soft);
}
.problem-chain i{ font-style:normal; opacity:.5; }
.problem-chain-final{ color: var(--terracotta); }

@media (max-width: 900px){
  .problem-block, .problem-block--reverse{ flex-direction:column; gap:22px; margin-bottom:80px; }
  .problem-visual{ flex-basis:auto; }
  .problem-support{ max-width:70%; align-self:flex-start; }
  .problem-support--food{ max-width:60%; }
}
@media (max-width: 560px){
  .problem-support, .problem-support--food{ max-width:100%; }
}

/* ---------- Synthesis + Opportunity ---------- */
.stage-synthesis{ position:relative; text-align:center; padding: 70px var(--edge); margin: 0 calc(var(--edge) * -1) 40px; }
.synthesis-orbit{ position:absolute; top:10%; left:50%; transform:translateX(-50%); width:min(600px,90%); height:60%; pointer-events:none; }
.synthesis-orbit path{ fill:none; stroke: var(--line); stroke-width:1; }
.synthesis-title{ position:relative; font-size: clamp(26px,4vw,42px); margin-bottom:10px; }
.synthesis-sub{ position:relative; color: var(--ink-dim); font-size:16px; margin-bottom:40px; }
.synthesis-terms{ position:relative; display:flex; flex-wrap:wrap; justify-content:center; gap:10px 16px; font-family:var(--f-mono); font-size:12px; color: var(--ink-faint); margin-bottom:26px; }
.synthesis-terms span{ padding:7px 14px; border:1px solid var(--line); border-radius:20px; }
.synthesis-result{ position:relative; display:flex; justify-content:center; gap:14px; font-family:var(--f-display); font-weight:700; font-size:15px; }
.synthesis-result span{ padding:10px 20px; border-radius:20px; background: var(--surface); }
.synthesis-result span:last-child{ color: var(--terracotta); }

.stage-opportunity{ text-align:center; max-width:620px; margin:0 auto; padding: 20px var(--edge) 40px; }
.opportunity-statement{ font-family: var(--f-display); font-weight:700; font-size: clamp(22px,3vw,32px); line-height:1.3; margin: 10px 0 12px; }
.opportunity-sub{ color: var(--ink-dim); font-size:15px; }

/* ---------- Concept sequence ---------- */
.concept-sequence{ display:flex; flex-direction:column; gap:56px; }
.concept-block{ display:flex; flex-direction:column; gap:20px; margin:0 auto; }
.concept-media img{ width:100%; border-radius:10px; border:1px solid var(--line-soft); display:block; }
.concept-copy{ display:flex; align-items:baseline; gap:16px; flex-wrap:wrap; }
.concept-copy .chapter-label{ margin-bottom:0; white-space:nowrap; }
.concept-copy p{ color: var(--ink-dim); font-size:15px; }
.concept-block--sm{ max-width:420px; }
.concept-block--md{ max-width:640px; }
.concept-block--lg{ max-width:760px; }
.concept-block--hero{ max-width:100%; }
.concept-block--hero .concept-media img{ width:auto; max-width:100%; height:auto; max-height:64vh; object-fit:contain; margin:0 auto; }
.concept-block:nth-child(odd){ margin-left:0; }
.concept-block--lg, .concept-block--hero{ align-self:center; }

/* ---------- System Logic ---------- */
.sl-phase{ margin-bottom:48px; }
.sl-phase--inside{ display:grid; grid-template-columns: 1fr 1fr; gap:24px; align-items:end; }
.sl-media img{ width:100%; border-radius:10px; border:1px solid var(--line-soft); display:block; }
.sl-media--lg{ }
.sl-caption{ grid-column: 1 / -1; }
.sl-caption p{ color: var(--ink-dim); font-size:15px; margin-top:6px; }

.sl-phase--details{ display:grid; grid-template-columns: repeat(3, 1fr); gap:22px; align-items:end; }
.sl-detail img{ width:100%; border-radius:10px; border:1px solid var(--line-soft); display:block; margin-bottom:12px; }
.sl-detail p{ color: var(--ink-dim); font-size:13.5px; margin-top:5px; }
.sl-detail--sm{ align-self:end; }
.sl-detail--md{ align-self:end; }
.sl-detail--lg{ }
.sl-detail--packaging{ max-width:340px; margin: 0 0 48px; }

.sl-hero{ position:relative; border-radius:14px; overflow:hidden; margin-bottom:20px; }
.sl-hero img{ width:100%; display:block; }
.sl-hero-copy{ position:absolute; left:0; right:0; bottom:0; padding: 60px var(--edge) 34px; background: linear-gradient(0deg, rgba(0,0,0,.75), transparent); color:#EDE8DD; }
.sl-hero-title{ font-size: clamp(24px,3.6vw,40px); line-height:1.15; margin:10px 0 8px; }
.sl-hero-copy p{ opacity:.85; font-size:14.5px; max-width:44ch; }

.sl-transition{ display:flex; align-items:center; gap:30px; margin-bottom:48px; }
.sl-media--md{ flex-shrink:0; width:280px; }
.sl-transition-text{ color: var(--ink-dim); font-size:14.5px; max-width:32ch; }
.sl-transition-text .chapter-label{ margin-bottom:8px; }

.sl-phase--vehicle{ display:grid; grid-template-columns: 1fr 1.3fr; gap:24px; align-items:end; }
.sl-phase--vehicle p{ color: var(--ink-dim); font-size:14px; margin-top:6px; }

@media (max-width: 860px){
  .sl-phase--inside, .sl-phase--details, .sl-phase--vehicle{ grid-template-columns: 1fr; }
  .sl-transition{ flex-direction:column; align-items:flex-start; }
  .sl-media--md{ width:100%; }
}

/* ---------- User Scenarios triptych ---------- */
.scenario-triptych{ display:grid; grid-template-columns: repeat(3, 1fr); gap:24px; margin-top:20px; }
.scenario-media{ border-radius:12px; overflow:hidden; background: var(--surface); aspect-ratio: 3/4; border:1px solid var(--line-soft); }
.scenario-video{ width:100%; height:100%; object-fit:cover; display:block; }
.scenario .chapter-label{ display:block; margin: 16px 0 4px; }
.scenario p{ color: var(--ink-dim); font-size:14px; }
.scenario-closing{ text-align:center; font-family:var(--f-mono); font-size:12.5px; letter-spacing:.1em; text-transform:uppercase; color: var(--ink-faint); margin-top:56px; }
@media (max-width: 760px){
  .scenario-triptych{ grid-template-columns: 1fr; max-width:360px; margin-left:auto; margin-right:auto; }
}

/* ---------- Final cover video (05) ---------- */
.chapter--finalcover{ position:relative; min-height:92svh; display:flex; align-items:flex-end; overflow:hidden; background:#000; }
.finalcover-video{ position:absolute; inset:0; width:100%; height:100%; object-fit:cover; z-index:0; }
.chapter--finalcover::after{ content:''; position:absolute; inset:0; background: linear-gradient(0deg, rgba(0,0,0,.6), transparent 45%); z-index:0; }
.chapter--finalcover .chapter-finalhero-copy{ position:relative; z-index:1; padding: 0 var(--edge) 60px; }

/* ==========================================================================
   PROFILE
   ========================================================================== */
#route-profile{ min-height:100svh; padding: 150px var(--edge) 100px; }
.profile-grid{ max-width: var(--container); margin:0 auto; display:grid; grid-template-columns: minmax(220px,340px) 1fr; gap: clamp(40px,6vw,100px); }
.profile-portrait img{ border-radius:10px; aspect-ratio:853/1280; object-fit:cover; box-shadow: 0 40px 80px -30px rgba(0,0,0,.5); }
.profile-role{ font-family: var(--f-mono); font-size:13px; color: var(--terracotta); letter-spacing:.06em; margin: 16px 0 22px; }
.profile-statement{ font-size:19px; color: var(--ink-dim); max-width:48ch; margin-bottom:44px; }
.profile-block{ padding:24px 0; border-top:1px solid var(--line); }
.profile-block-label{ display:block; font-family:var(--f-mono); font-size:11px; letter-spacing:.1em; text-transform:uppercase; color: var(--ink-faint); margin-bottom:12px; }
.profile-block p{ max-width:56ch; color: var(--ink); }
.profile-muted{ color: var(--ink-faint); }
.profile-taglist{ display:flex; flex-wrap:wrap; gap:8px; }
.profile-taglist li{ font-size:13.5px; padding:7px 13px; border:1px solid var(--line); border-radius:20px; color: var(--ink-dim); }
.profile-taglist--tools li{ font-family: var(--f-mono); font-size:12px; }
@media (max-width: 800px){ .profile-grid{ grid-template-columns:1fr; } .profile-portrait{ max-width:220px; } }

/* ==========================================================================
   CONTACT
   ========================================================================== */
#route-contact{ min-height:100svh; padding: 150px var(--edge) 100px; }
#route-contact.is-active{ display:flex; align-items:center; }
.contact-wrap{ max-width: var(--container); margin:0 auto; width:100%; }
.contact-title{ font-size: clamp(40px,7vw,90px); line-height:.98; letter-spacing:-.02em; margin: 8px 0 20px; }
.contact-cta{
  margin-top:42px; display:inline-flex; align-items:center; gap:16px;
  padding: 20px 30px; border-radius:100px; background: var(--terracotta); color:#19110E;
  font-family: var(--f-display); font-weight:700; font-size: clamp(18px,2.2vw,24px);
  transition: transform .35s var(--ease), filter .3s;
}
.contact-cta:hover{ transform: translateX(6px); filter:brightness(1.06); }
.contact-cta svg{ width:22px; height:22px; }
.contact-channels{ display:flex; flex-wrap:wrap; gap:14px 18px; margin-top:56px; padding-top:32px; border-top:1px solid var(--line); }
.contact-channel{
  display:flex; align-items:center; gap:12px;
  padding:10px 16px 10px 10px; border:1px solid var(--line); border-radius:30px;
  transition: border-color .25s, transform .25s var(--ease);
}
.contact-channel:hover{ border-color: var(--terracotta); transform: translateY(-2px); }
.contact-channel:hover .contact-channel-icon{ color: var(--terracotta); }
.contact-channel-icon{
  display:flex; align-items:center; justify-content:center;
  width:34px; height:34px; border-radius:50%; flex-shrink:0;
  background: var(--surface); color: var(--ink-dim);
  transition: color .25s;
}
.contact-channel-icon svg{ width:17px; height:17px; }
.contact-channel-text{ display:flex; flex-direction:column; font-family:var(--f-mono); }
.contact-channel-label{ font-size:10px; letter-spacing:.1em; text-transform:uppercase; color: var(--ink-faint); }
.contact-channel-value{ font-size:12.5px; color: var(--ink-dim); }
.contact-channel:hover .contact-channel-value{ color: var(--terracotta); }

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer{
  position:relative; z-index:2;
  display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap;
  padding: 30px var(--edge) 40px; border-top:1px solid var(--line);
  font-family: var(--f-mono); font-size:12px; color: var(--ink-faint);
}
.site-footer-mid{ opacity:.7; }
.site-footer a{ transition:color .25s; }
.site-footer a:hover{ color: var(--terracotta); }

/* ==========================================================================
   FOCUS / A11Y
   ========================================================================== */
a:focus-visible, button:focus-visible{ outline: 2px solid var(--terracotta); outline-offset:3px; border-radius:4px; }