/* ============================================================
   ICARUS YE — PORTFOLIO 2026 · v3 REBUILD
   Mirror's Edge Catalyst · white model · contour lines ·
   radial halftone field · single blue #2F2FE4.
   Chapters implemented: responsive base (4 breakpoints),
   contour hero, cold-white data strip, top-image highlight
   cards, hover-reveal dot-matrix avatar, minimal contact &
   footer, standalone All Works page. Sharp, quiet, fast.
   ============================================================ */

/* ---------- FONTS · Ch30/#10: local self-hosted, zero CDN ----------
   Display: Space Grotesk · Body: Manrope · Mono: DM Mono (OFL)
   CJK: Glow Sans SC / Glow Sans TC (OFL, subset to used glyphs)   */
/* Space Grotesk — display */
@font-face{font-family:'Space Grotesk';font-style:normal;font-weight:300;font-display:swap;src:url('../fonts/sg-45.woff2') format('woff2');}
@font-face{font-family:'Space Grotesk';font-style:normal;font-weight:400;font-display:swap;src:url('../fonts/sg-55.woff2') format('woff2');}
@font-face{font-family:'Space Grotesk';font-style:normal;font-weight:500;font-display:swap;src:url('../fonts/sg-65.woff2') format('woff2');}
@font-face{font-family:'Space Grotesk';font-style:normal;font-weight:600;font-display:swap;src:url('../fonts/sg-75.woff2') format('woff2');}
/* Manrope — body */
@font-face{font-family:'Manrope';font-style:normal;font-weight:200;font-display:swap;src:url('../fonts/mr-45.woff2') format('woff2');}
@font-face{font-family:'Manrope';font-style:normal;font-weight:300;font-display:swap;src:url('../fonts/mr-55.woff2') format('woff2');}
@font-face{font-family:'Manrope';font-style:normal;font-weight:400;font-display:swap;src:url('../fonts/mr-65.woff2') format('woff2');}
@font-face{font-family:'Manrope';font-style:normal;font-weight:500;font-display:swap;src:url('../fonts/mr-75.woff2') format('woff2');}
@font-face{font-family:'Manrope';font-style:normal;font-weight:600;font-display:swap;src:url('../fonts/mr-85.woff2') format('woff2');}
/* DM Mono — spec / mono */
@font-face{font-family:'DM Mono';font-style:normal;font-weight:400;font-display:swap;src:url('../fonts/dm-55.woff2') format('woff2');}
@font-face{font-family:'DM Mono';font-style:normal;font-weight:500;font-display:swap;src:url('../fonts/dm-65.woff2') format('woff2');}
/* Glow Sans SC — Simplified Chinese (subset) */
@font-face{font-family:'GlowSC';font-style:normal;font-weight:300;font-display:swap;src:url('../fonts/glow-sc-45.woff2') format('woff2');}
@font-face{font-family:'GlowSC';font-style:normal;font-weight:400;font-display:swap;src:url('../fonts/glow-sc-55.woff2') format('woff2');}
@font-face{font-family:'GlowSC';font-style:normal;font-weight:500;font-display:swap;src:url('../fonts/glow-sc-65.woff2') format('woff2');}
/* Glow Sans TC — Traditional Chinese (subset) */
@font-face{font-family:'GlowTC';font-style:normal;font-weight:300;font-display:swap;src:url('../fonts/glow-tc-45.woff2') format('woff2');}
@font-face{font-family:'GlowTC';font-style:normal;font-weight:400;font-display:swap;src:url('../fonts/glow-tc-55.woff2') format('woff2');}
@font-face{font-family:'GlowTC';font-style:normal;font-weight:500;font-display:swap;src:url('../fonts/glow-tc-65.woff2') format('woff2');}

/* ---------- TOKENS ---------- */
:root{
  --bg:#FAFAFA;
  --bg2:#F5F6F7;
  --card:#FFFFFF;
  --ink:#1A1A2E;
  --ink70:rgba(26,26,46,.72);
  --ink50:rgba(26,26,46,.5);
  --ink30:rgba(26,26,46,.3);
  --line:#E3E6EA;
  --accent:#2F2FE4;
  --accent-deep:#162E93;
  /* Ch30: display / body / mono stacks, CJK appended per lang */
  --f-disp:'Space Grotesk',var(--f-cjk),'PingFang SC','PingFang HK',sans-serif;
  --f-body:'Manrope',var(--f-cjk),'PingFang SC','PingFang HK',sans-serif;
  --f-mono:'DM Mono',var(--f-cjk),monospace;
  /* base default = body */
  --f:var(--f-body);
  --ease:cubic-bezier(.22,1,.36,1);
  --t:200ms var(--ease);
  --gutter:clamp(20px,4vw,64px);
  --maxw:1440px;
}
/* Ch10: CJK stack by language */
:root{--f-cjk:'GlowSC','GlowTC';}
html[lang="zh-Hant-HK"]{--f-cjk:'GlowTC','GlowSC';}

/* ---------- BASE ---------- */
*{margin:0;padding:0;box-sizing:border-box;border-radius:0!important}
html{scroll-behavior:smooth;scroll-padding-top:96px}
body{
  background-color:var(--bg);
  background-image:radial-gradient(circle,#C8CDD2 .8px,transparent .8px);
  background-size:28px 28px;
  color:var(--ink);
  font-family:var(--f);font-size:15px;line-height:1.65;font-weight:400;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
/* Ch30: display & mono roles */
h1,h2,h3,h4,h5,h6,.hero-name,.sec-title,.pre-word,.colo-hero h1,.cs h2,.hl-h,.case-hero h1{font-family:var(--f-disp)}
.st-num,.cell-idx,.sec-num,.pre-meta,.fig,.hex,.bento-title,.sw .hex,.type-role,.coords,.hero-foot,.hf-r,.m-idx,.trk-year,.edu-year,.edu .grade,.lang-row .v,.cell-cat,.hl-num,.hl-meta,.works-foot,.foot,.skip,.nav-cv,.lang-btn,.menu-btn,.kicker,.tb-cap,.cf-cap,.cf-fallback,.c-mail,.cv-row .btn,.st-lbl,.sec-meta,.roles,.about-lede mark,.trk-role .co,.trk-loc,.trk-metric,.contact-lede,.ch-idx,.case-aside .k,.case-aside .v,.link-box .lb-k,.btn,.fbtn,.fbtn sup,.cell-title .award,.cell-cap,.cell-title,.cell-cat,.award,.zh-sub,.zh-sm,.hero-cn,.pre-word,.pre-line i,.af-cap,.lbx-x,.cursor::after,#cursor::after,#cursor.hov::after,#progress i,#prebar,#pct,.m-idx,.m-title,.m-sub,.m-cap,.m-idx{font-family:var(--f-mono)}
::selection{background:var(--accent);color:#fff}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
button{font-family:inherit}
::-webkit-scrollbar{width:4px;height:4px}
::-webkit-scrollbar-track{background:var(--bg2)}
::-webkit-scrollbar-thumb{background:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.wrap{max-width:var(--maxw);margin:0 auto;padding-left:var(--gutter);padding-right:var(--gutter)}
.skip{
  position:fixed;top:-64px;left:16px;z-index:1200;
  font-size:11px;font-weight:500;letter-spacing:.18em;text-transform:uppercase;
  background:var(--ink);color:#fff;padding:10px 16px;transition:top var(--t);
}
.skip:focus{top:12px}

/* ---------- WIPE (entry sweep only) · Ch33: softened, 420ms, ~90% ----------
   soft feather on the moving edge (right side), lower peak luminance   */
#wipe{
  position:fixed;inset:0;z-index:1100;
  background:linear-gradient(to right,
    rgba(47,47,228,.9) 0%, rgba(47,47,228,.9) calc(100% - 110px),
    rgba(47,47,228,0) 100%);
  transform:scaleX(0);transform-origin:right;pointer-events:none;
}
#wipe.out{transform:scaleX(0);transform-origin:left;transition:transform 420ms var(--ease)}
#wipe.pre{transform:scaleX(1);transform-origin:left;transition:none}

/* ---------- LANG VEIL · soft white transition for in-place language switch ---------- */
#langVeil{
  position:fixed;inset:0;z-index:1050;pointer-events:none;
  background:var(--bg);opacity:0;
  transition:opacity 140ms ease-out;
}
#langVeil.on{opacity:.82}
@media (prefers-reduced-motion:reduce){
  #langVeil{display:none}
}

/* ---------- PRELOADER ---------- */
#preloader{
  position:fixed;inset:0;z-index:1000;background:var(--bg);
  display:flex;align-items:center;justify-content:center;
  transition:opacity 220ms var(--ease);opacity:1;
}
#preloader.done{opacity:0;pointer-events:none}
.pre-box{text-align:center}
.pre-word{
  font-size:clamp(1.4rem,4.5vw,2.6rem);font-weight:200;letter-spacing:.55em;
  text-transform:uppercase;color:var(--ink);text-indent:.55em;
}
.pre-line{width:min(320px,60vw);height:1px;background:var(--line);margin:22px auto 0;position:relative;overflow:hidden}
.pre-line i{position:absolute;inset:0;background:var(--accent);transform-origin:left;transform:scaleX(0)}
.pre-meta{
  margin-top:16px;font-size:10px;font-weight:500;letter-spacing:.3em;
  text-transform:uppercase;color:var(--ink50);font-variant-numeric:tabular-nums;
}
.pre-meta b{color:var(--accent);font-weight:500}

/* ---------- CURSOR ---------- */
#cursor{
  position:fixed;top:0;left:0;width:10px;height:10px;background:var(--accent);
  z-index:990;pointer-events:none;transform:translate(-50%,-50%);
  transition:width 150ms var(--ease),height 150ms var(--ease),background 150ms,opacity 200ms;
  opacity:0;display:flex;align-items:center;justify-content:center;
}
#cursor.on{opacity:1}
#cursor.hov{width:58px;height:58px;background:rgba(255,255,255,.92);border:1.5px solid var(--accent)}
#cursor.hov::after{
  content:attr(data-text);font-size:8.5px;font-weight:600;letter-spacing:.1em;
  color:var(--accent);white-space:nowrap;text-transform:uppercase;
}
@media (hover:none){#cursor{display:none}}

/* ---------- PROGRESS ---------- */
#progress{position:fixed;top:0;left:0;height:2px;width:100%;z-index:200;background:transparent}
#progress i{display:block;height:100%;background:var(--accent);transform-origin:left;transform:scaleX(0)}

/* ---------- NAV · Ch11: aligned, larger type, CV button ---------- */
header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  border-bottom:1px solid transparent;
  transition:background var(--t),border-color var(--t),transform 280ms var(--ease);
}
header.scrolled{background:rgba(250,250,250,.88);backdrop-filter:blur(12px);border-bottom-color:var(--line)}
/* Ch55: direction-aware chrome hide (JS drives body.chrome-hidden) */
body.chrome-hidden header{transform:translateY(-100%)}
body.chrome-hidden footer{transform:translateY(100%)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:20px;height:76px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:15px;letter-spacing:.12em}
.logo i{width:9px;height:9px;background:var(--accent);flex:none}
.logo b{font-weight:600}
.logo span{font-size:12px;color:var(--ink50);font-weight:400;letter-spacing:.08em}
.nav-links{display:flex;align-items:center;gap:clamp(16px,2.4vw,34px)}
.nav-links a{
  position:relative;font-size:13px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink70);padding:6px 0;line-height:1;transition:color var(--t);
}
.nav-links a::after{
  content:'';position:absolute;left:0;bottom:0;height:1.5px;width:100%;
  background:var(--accent);transform:scaleX(0);transform-origin:right;transition:transform var(--t);
}
.nav-links a:hover,.nav-links a.active{color:var(--ink)}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1);transform-origin:left}
.nav-right{display:flex;align-items:center;gap:14px}
.lang-switch{display:flex;align-items:center;border:1px solid var(--line);background:var(--card)}
.lang-btn{
  display:inline-flex;align-items:center;justify-content:center;min-width:38px;height:34px;
  font-size:12px;font-weight:600;letter-spacing:.06em;color:var(--ink50);
  transition:color var(--t),background var(--t);
}
.lang-btn + .lang-btn{border-left:1px solid var(--line)}
.lang-btn:hover{color:var(--ink)}
.lang-btn.on{color:var(--accent);background:rgba(47,47,228,.07)}
.nav-cv{
  display:inline-flex;align-items:center;height:34px;padding:0 18px;
  font-size:12px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  border:1.5px solid var(--ink);background:var(--ink);color:#fff;
  transition:background var(--t),border-color var(--t),color var(--t);
}
.nav-cv:hover{background:var(--accent);border-color:var(--accent);color:#fff}
.menu-btn{
  display:none;width:40px;height:40px;border:1px solid var(--line);background:var(--card);
  flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer;
}
.menu-btn i{display:block;width:18px;height:1.5px;background:var(--ink);transition:transform var(--t),opacity var(--t)}
.menu-btn.open i:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.menu-btn.open i:nth-child(2){opacity:0}
.menu-btn.open i:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

/* ---------- MOBILE MENU ---------- */
.mobile-menu{
  position:fixed;inset:0;z-index:95;background:var(--bg);
  display:flex;flex-direction:column;justify-content:center;padding:0 var(--gutter);
  opacity:0;visibility:hidden;transition:opacity 220ms var(--ease),visibility 220ms;
}
.mobile-menu.open{opacity:1;visibility:visible}
.mobile-menu a{
  display:flex;align-items:baseline;justify-content:space-between;
  padding:20px 0;border-bottom:1px solid var(--line);
  font-size:clamp(1.6rem,7vw,2.4rem);font-weight:200;letter-spacing:.18em;text-transform:uppercase;
}
.mobile-menu .m-idx{font-size:11px;font-weight:500;letter-spacing:.2em;color:var(--accent)}
@media (min-width:1024px){.mobile-menu{display:none!important}}

/* ---------- HERO · contour field, static blue route ---------- */
#top{
  position:relative;min-height:100svh;overflow:hidden;
  display:flex;flex-direction:column;
}
.hero-visual{
  position:absolute;top:0;right:0;bottom:0;width:58%;
  clip-path:polygon(24% 0,100% 0,100% 100%,0 100%);
  background:var(--bg2);
}
.hero-grid{position:relative;z-index:2;flex:1;display:flex;align-items:center;width:100%}
.hero-copy{max-width:620px}
.kicker{
  display:flex;align-items:center;gap:10px;
  font-size:11px;font-weight:600;letter-spacing:.22em;text-transform:uppercase;color:var(--ink70);
}
.kicker i{width:8px;height:8px;background:var(--accent);flex:none}
.hero-name{
  margin-top:26px;
  font-size:clamp(3.6rem,11vw,9.6rem);font-weight:200;line-height:.92;
  letter-spacing:.08em;text-transform:uppercase;
}
.hero-name .line-mask{display:block;overflow:hidden}
.hero-name .l1,.hero-name .l2{display:block}
.hero-name .l2{color:var(--ink50)}
/* Ch41: zh/tw replace YE with real name — same size/weight, slight tracking tighten for CJK */
html[lang="zh-Hans-CN"] .hero-name .l2,html[lang="zh-Hant-HK"] .hero-name .l2{letter-spacing:.04em}
.roles{
  display:flex;flex-wrap:wrap;gap:12px clamp(18px,3vw,40px);margin-top:30px;
  font-size:12px;font-weight:500;letter-spacing:.18em;text-transform:uppercase;color:var(--ink70);
}
.roles b{color:var(--accent);font-weight:600;margin-right:8px}
.hero-tag{
  margin-top:26px;max-width:520px;
  font-size:clamp(.95rem,1.6vw,1.08rem);font-weight:300;line-height:1.7;color:var(--ink70);
}
.hero-foot{
  position:relative;z-index:2;
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  padding-top:18px;padding-bottom:26px;
  border-top:1px solid var(--line);
  font-size:10px;font-weight:500;letter-spacing:.22em;text-transform:uppercase;color:var(--ink50);
  font-variant-numeric:tabular-nums;
}

/* ---------- MARQUEE SYSTEM · Ch18/24/29: shared bands, global linked pause ---------- */
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.mq{position:relative;--mq-fade:var(--bg)}
/* Ch49: lane = hidden-scrollbar scroll container; JS rAF drives scrollLeft,
   drag moves scrollLeft 1:1 (Works Highlight 同款原理) */
.mq-lane{overflow-x:auto;overflow-y:hidden;scrollbar-width:none;-ms-overflow-style:none;cursor:grab}
.mq-lane::-webkit-scrollbar{display:none}
.mq-lane.grabbing{cursor:grabbing}
.mq-row{display:flex;align-items:center;width:max-content}
/* left fade keeps content readable at the edge */
.mq::before{
  content:'';position:absolute;left:0;top:0;bottom:0;width:calc(var(--gutter) + 60px);
  background:linear-gradient(to right,var(--mq-fade) 25%,transparent);
  z-index:5;pointer-events:none;
}

/* ---------- DATA STRIP · Ch24: single-line marquee + hover blue highlight ---------- */
.strip{
  background:var(--bg2);--mq-fade:var(--bg2);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.strip .mq-row{align-items:stretch}
.st{
  flex:none;display:flex;align-items:baseline;gap:16px;
  padding:clamp(24px,3.4vw,42px) clamp(24px,3vw,44px);
  border-left:1px solid var(--line);
  transition:background var(--t);
}
.st:first-child{border-left:0}
.st-num{
  font-size:clamp(1.9rem,3.4vw,2.8rem);font-weight:200;line-height:1;color:var(--ink);
  font-variant-numeric:tabular-nums;letter-spacing:.02em;white-space:nowrap;
  transition:color var(--t);
}
.st-num em{font-style:normal;transition:font-weight var(--t)}
.st-lbl{
  font-size:10.5px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink50);line-height:1.55;max-width:230px;transition:color var(--t);
}
.st:hover{background:var(--accent)}
.st:hover .st-num{color:#fff}
.st:hover .st-num em{font-weight:500}
.st:hover .st-lbl{color:rgba(255,255,255,.85)}

/* ---------- SECTIONS COMMON ---------- */
.sec-pad{padding:clamp(72px,10vh,128px) 0}
.sec-head{display:flex;align-items:baseline;gap:clamp(14px,2vw,26px);flex-wrap:wrap}
.sec-num{
  font-size:12px;font-weight:600;letter-spacing:.2em;color:var(--accent);
  font-variant-numeric:tabular-nums;
}
.sec-title{
  font-size:clamp(2.4rem,6vw,4.6rem);font-weight:200;line-height:1;
  letter-spacing:.14em;text-transform:uppercase;
}
.sec-meta{
  margin-left:auto;text-align:right;
  font-size:10px;font-weight:500;letter-spacing:.2em;text-transform:uppercase;
  color:var(--ink50);line-height:1.9;
}

/* ---------- HIGHLIGHT CARDS · Ch7: image top, text below ---------- */
/* Ch25: horizontal sweep rail — overflow-x + scroll-snap, wheel-hijack on hover */
.hl-rail{position:relative;margin-top:clamp(40px,5vw,64px)}
.hl-grid{
  display:flex;gap:clamp(18px,2.4vw,32px);
  overflow-x:auto;overflow-y:hidden;
  scroll-snap-type:x mandatory;
  scrollbar-width:none; /* hide scrollbar, visual cue via arrows + dots */
  padding-bottom:6px;
  -webkit-overflow-scrolling:touch;
}
.hl-grid::-webkit-scrollbar{display:none}
.hl-card{
  flex:none;width:min(78vw,560px);
  scroll-snap-align:start;
  display:flex;flex-direction:column;
  background:var(--card);border:1px solid var(--line);
  transition:border-color var(--t),transform var(--t),box-shadow var(--t);
}
.hl-card:hover{
  border-color:var(--accent);transform:translateY(-4px);
  box-shadow:0 18px 44px rgba(26,26,46,.08);
}
/* Ch40: edge fade masks always on — the only scroll hint (arrows removed) */
.hl-rail::before,.hl-rail::after{
  content:'';position:absolute;top:0;bottom:0;width:clamp(28px,6vw,80px);
  pointer-events:none;z-index:3;opacity:0;transition:opacity var(--t);
}
.hl-rail::before{left:0;background:linear-gradient(to right,var(--bg),transparent)}
.hl-rail::after{right:0;background:linear-gradient(to left,var(--bg),transparent)}
.hl-rail.has-prev::before{opacity:1}
.hl-rail.has-next::after{opacity:1}
/* progress dots */
.hl-dots{display:flex;gap:8px;justify-content:center;margin-top:22px}
.hl-dots i{
  width:8px;height:8px;background:var(--ink30);flex:none;cursor:pointer;
  transition:background var(--t),transform var(--t);
}
.hl-dots i.on{background:var(--accent);transform:scale(1.25)}
.hl-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg2)}
.hl-media img{
  width:100%;height:100%;object-fit:cover;
  filter:grayscale(1);transition:filter var(--t),transform 400ms var(--ease);
}
.hl-card:hover .hl-media img{filter:grayscale(0);transform:scale(1.03)}
.hl-num{
  position:absolute;top:12px;left:14px;z-index:2;
  font-size:11px;font-weight:600;letter-spacing:.18em;color:#fff;
  background:var(--accent);padding:4px 8px;font-variant-numeric:tabular-nums;
}
.hl-arrow{
  position:absolute;right:14px;bottom:12px;z-index:2;
  width:34px;height:34px;display:grid;place-items:center;
  background:var(--accent);color:#fff;font-size:15px;
  opacity:0;transform:translateY(6px);
  transition:opacity var(--t),transform var(--t);
}
.hl-card:hover .hl-arrow{opacity:1;transform:none}
.hl-body{display:flex;flex-direction:column;gap:10px;padding:clamp(18px,2.2vw,26px)}
.hl-tag{font-size:10px;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--accent)}
.hl-h{
  font-size:clamp(1.25rem,2vw,1.6rem);font-weight:300;letter-spacing:.06em;
  text-transform:uppercase;line-height:1.2;
}
.hl-h .zh-sm{display:block;font-size:.62em;font-weight:400;letter-spacing:.12em;color:var(--ink50);margin-top:6px;text-transform:none}
.hl-one{font-size:13px;line-height:1.7;color:var(--ink70)}
.hl-meta{
  margin-top:auto;padding-top:12px;border-top:1px solid var(--line);
  font-size:9.5px;font-weight:500;letter-spacing:.18em;text-transform:uppercase;color:var(--ink50);
}
.works-link{
  align-self:baseline;font-size:12px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink);border-bottom:1.5px solid var(--accent);padding-bottom:3px;
  transition:color var(--t),border-color var(--t);white-space:nowrap;
}
.works-link:hover{color:var(--accent)}

/* ---------- TEXTURE BAND · contour divider ---------- */
.texture-band{position:relative;height:200px;background:var(--bg2);overflow:hidden;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}

/* ---------- Ch50: Metro live-tile fields (tiles.js) ----------
   single blue in 4%/8%/16% tiers + 1–2 solid accents; L→R density
   gradient; mixed 1×1 / 2×1 / 2×2 / 3×2 tiles; ~18% flip (rotateY). */
.tile-field{
  position:absolute;inset:0;overflow:hidden;pointer-events:none;
  display:grid;place-content:center;
  grid-template-columns:repeat(var(--cols,24),var(--cell,28px));
  grid-auto-rows:var(--cell,28px);
  gap:3px;
}
.tile{position:relative;transform-style:preserve-3d}
.tile .tf,.tile .tb{
  position:absolute;inset:0;display:block;
  backface-visibility:hidden;-webkit-backface-visibility:hidden;
}
.tile .tb{transform:rotateY(180deg)}
.tile.flip{
  animation:tileFlip var(--fd,9s) cubic-bezier(.65,0,.35,1) infinite;
  animation-delay:var(--fdel,0s);
  will-change:transform;
}
@keyframes tileFlip{
  0%,38%{transform:rotateY(0deg)}
  50%,88%{transform:rotateY(180deg)}
  100%{transform:rotateY(360deg)}
}
@media (prefers-reduced-motion:reduce){.tile.flip{animation:none}}

/* ---------- ABOUT · Ch6: hover title reveals dot-matrix avatar ---------- */
.profile-top{max-width:880px;margin-top:clamp(32px,4vw,52px)}
.about-lede{
  font-size:clamp(1.2rem,2vw,1.55rem);line-height:1.55;font-weight:300;letter-spacing:.01em;
}
.about-lede mark{background:linear-gradient(transparent 62%,rgba(47,47,228,.18) 62%);color:var(--ink)}
/* Ch35: keyword activation — blue + underline sweep on hover (pure CSS, no scramble) */
.about-lede mark.kw{
  position:relative;cursor:default;
  transition:color var(--t);
}
.about-lede mark.kw::after{
  content:'';position:absolute;left:0;right:100%;bottom:-2px;height:1.5px;
  background:var(--accent);transition:right 260ms var(--ease);
}
.about-lede mark.kw:hover{color:var(--accent)}
.about-lede mark.kw:hover::after{right:0}
/* Ch35: paragraph-level micro-interaction (strong version) */
.about-lede,.about-sub{transition:color var(--t)}
.profile-top:hover .about-lede{color:var(--ink)}
.about-sub:hover{color:var(--ink)}
/* Ch35: place chips — diamond-marked, blue + lift on hover */
.about-sub .chip{
  display:inline-block;position:relative;padding:1px 7px 1px 14px;margin:0 1px;
  font-weight:500;color:var(--ink);white-space:nowrap;
  border:1px solid var(--line);background:var(--card);
  transition:color var(--t),border-color var(--t),transform var(--t),background var(--t);
}
.about-sub .chip::before{
  content:'';position:absolute;left:5px;top:50%;width:5px;height:5px;
  background:var(--accent);transform:translateY(-50%) rotate(45deg);
  transition:background var(--t);
}
.about-sub .chip:hover{
  color:var(--accent);border-color:var(--accent);background:rgba(47,47,228,.05);
  transform:translateY(-2px);
}
.about-sub{margin-top:20px;font-size:14.5px;line-height:1.75;color:var(--ink70);max-width:640px}
#about .sec-head{cursor:default}
#about .sec-title{transition:color var(--t)}
#about .sec-head:hover .sec-title{color:var(--accent-deep)}
.p-cols{display:grid;grid-template-columns:minmax(0,1fr);gap:clamp(36px,5vw,72px);align-items:start;margin-top:clamp(36px,4vw,56px);max-width:880px}
.edu-tl{border-top:1px solid var(--ink)}
.edu{display:grid;grid-template-columns:88px 1fr;gap:clamp(16px,3vw,36px);padding:24px 0;border-bottom:1px solid var(--line)}
.edu-year{font-size:11px;font-weight:600;letter-spacing:.14em;color:var(--ink50);line-height:1.7;font-variant-numeric:tabular-nums}
.edu h3{font-size:15.5px;font-weight:500;line-height:1.45;letter-spacing:.02em}
.edu p{margin-top:8px;font-size:12.5px;line-height:1.7;color:var(--ink70)}
.edu .grade{display:inline-block;margin-top:10px;font-size:10.5px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}
.lang-list{margin-top:28px;border-top:1px solid var(--ink)}
.lang-row{display:flex;justify-content:space-between;gap:14px;padding:12px 0;border-bottom:1px solid var(--line);font-size:13px}
.lang-row .k{font-weight:500}
.lang-row .v{color:var(--ink50);font-size:12px;letter-spacing:.06em}
.bento-title{
  margin-top:clamp(40px,5vw,64px);
  font-size:11px;font-weight:600;letter-spacing:.26em;text-transform:uppercase;color:var(--ink50);
}
/* ---------- CAPABILITIES WALL · Ch18/19: multi-row marquee, L→R, varied speeds ---------- */
.capwall{
  margin-top:18px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.capwall .mq-lane + .mq-lane{border-top:1px solid var(--line)}
.capwall .mq-row{padding:15px 0}
.mq-cat{
  flex:none;font-size:9px;font-weight:600;letter-spacing:.2em;text-transform:uppercase;
  color:#fff;background:var(--accent);padding:4px 9px;margin:0 22px;white-space:nowrap;
}
.mq-item{
  flex:none;font-size:clamp(.98rem,1.5vw,1.2rem);font-weight:300;letter-spacing:.02em;
  color:var(--ink);white-space:nowrap;transition:color var(--t);
}
.mq-item:hover{color:var(--accent)}
.mq-dot{
  flex:none;width:5px;height:5px;background:var(--accent);
  transform:rotate(45deg);margin:0 22px;
}
/* floating avatar — original colour photo; desktop follows cursor, mobile tap-to-toggle */
#avatarFloat{
  position:fixed;left:0;top:0;z-index:90;
  width:min(300px,26vw);
  opacity:0;visibility:hidden;pointer-events:none;
  transform:scale(.94) rotate(20deg); /* Ch53: tilted for dynamism */
  transition:opacity 240ms var(--ease),transform 240ms var(--ease),visibility 240ms;
  will-change:left,top,transform;
}
#avatarFloat.on{opacity:1;visibility:visible;transform:scale(1) rotate(20deg)}
#avatarFloat .af-frame{background:var(--card);border:1px solid var(--ink);box-shadow:0 24px 60px rgba(26,26,46,.16)}
#avatarFloat img{display:block;width:100%;height:auto;aspect-ratio:4/5;object-fit:cover}
#avatarFloat .af-cap{
  display:flex;justify-content:space-between;gap:10px;padding:10px 12px;border-top:1px solid var(--line);
  font-size:9px;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--ink50);
}
/* mobile / touch: width tuned for small screens; position set by JS */
@media (hover:none),(max-width:1023px){
  #avatarFloat{width:min(300px,72vw)}
}
/* about sec-head hover targets get the portrait hint cursor */
#about .sec-head .sec-num,#about .sec-head .sec-title,#about .sec-head .sec-meta{cursor:pointer}
@media (hover:none),(max-width:1023px){
  #about .sec-head{tap-highlight-color:transparent}
}

/* ---------- EXPERIENCE · Ch36: subhead inside About (no top-nav entry) ---------- */
.exp-sub{padding-top:0}
.exp-subhead{
  display:flex;align-items:baseline;gap:clamp(14px,2vw,26px);flex-wrap:wrap;
  padding-top:clamp(28px,4vw,44px);border-top:1px solid var(--line);
}
.exp-subtitle{
  font-size:clamp(1.15rem,2vw,1.5rem);font-weight:600;letter-spacing:.2em;text-transform:uppercase;
}
.exp-subtitle::before{
  content:'';display:inline-block;width:8px;height:8px;margin-right:12px;
  background:var(--accent);transform:rotate(45deg) translateY(-1px);
}
.exp-submeta{
  margin-left:auto;text-align:right;
  font-size:10px;font-weight:500;letter-spacing:.2em;text-transform:uppercase;
  color:var(--ink50);line-height:1.9;
}
/* ---------- EXPERIENCE · Ch13: contour elevation bands — time as altitude ---------- */
/* Ch47: blue contour wave per entry REMOVED; rows kept clean */
.track{margin-top:clamp(24px,3vw,36px);border-top:1px solid var(--ink)}
.trk{
  position:relative;border-bottom:1px solid var(--line);transition:background var(--t);
}
.trk:hover{background:var(--card)}
.trk-grid{
  position:relative;
  display:grid;grid-template-columns:130px minmax(0,1.1fr) minmax(0,1.4fr) auto;
  gap:clamp(16px,3vw,44px);align-items:baseline;padding:26px 0;
}
/* elevation-marker year: mono, small, blue/ink two-tone */
.trk-year{
  font-family:var(--f-mono);font-size:10.5px;font-weight:500;letter-spacing:.12em;
  color:var(--ink);line-height:1.9;font-variant-numeric:tabular-nums;
}
.trk-year::before{
  content:'ELEV';display:block;font-size:8px;font-weight:500;letter-spacing:.32em;
  color:var(--accent);margin-bottom:6px;
}
.trk-role h3{font-size:clamp(1.02rem,1.7vw,1.3rem);font-weight:500;letter-spacing:.02em;line-height:1.35}
.trk-role .co{margin-top:6px;font-size:11px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--accent)}
.trk-meta{font-size:12.5px;line-height:1.75;color:var(--ink70)}
.trk-metric{display:block;margin-top:8px;font-size:11px;font-weight:600;letter-spacing:.08em;color:var(--ink)}
.trk-loc{font-size:10px;font-weight:500;letter-spacing:.16em;text-transform:uppercase;color:var(--ink50);white-space:nowrap}
/* Ch26: company / school name → official site */
.co-link{
  color:inherit;border-bottom:1px solid transparent;
  transition:color var(--t),border-color var(--t);
}
.co-link:hover{color:var(--accent);border-color:var(--accent)}
.edu h3 .co-link{font-weight:inherit}

/* ---------- CONTACT · Ch51: card right column runs full height beside title ---------- */
.contact-grid{
  display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  gap:clamp(44px,7vw,110px);align-items:stretch;
}
.contact-left .sec-head{margin-bottom:clamp(36px,4vw,56px)}
.contact-right{display:flex;flex-direction:column;align-items:center;justify-content:center}
.contact-lede{font-size:clamp(1.05rem,1.8vw,1.3rem);font-weight:300;line-height:1.65;max-width:54ch}
.c-mail{
  display:inline-block;margin-top:26px;
  font-size:14px;font-weight:500;letter-spacing:.04em;color:var(--ink);
  border-bottom:1.5px solid var(--accent);padding-bottom:3px;
  transition:color var(--t),border-color var(--t);
}
.c-mail:hover{color:var(--accent)}
.cv-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:34px}
.cf-cap{
  display:block;font-size:10px;font-weight:600;letter-spacing:.22em;text-transform:uppercase;color:var(--ink50);
  margin-bottom:12px;
}
.card-frame{
  border:1px solid var(--ink);background:var(--card);
  aspect-ratio:9/16;width:min(100%,380px);margin-inline:auto;
  position:relative;overflow:hidden;
}
.card-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
@media (min-width:1024px){
  /* Ch2: strict 9:16 driven by height on desktop */
  .card-frame{width:auto;height:clamp(520px,68vh,680px)}
}
.cf-fallback{
  display:inline-block;margin-top:12px;
  font-size:11.5px;font-weight:500;letter-spacing:.08em;color:var(--ink50);
  border-bottom:1px solid var(--line);padding-bottom:2px;
  transition:color var(--t),border-color var(--t);
}
.cf-fallback:hover{color:var(--accent);border-color:var(--accent)}

/* ---------- FOOTER · Ch45: sticky, translucent, site-wide ---------- */
footer{
  position:sticky;bottom:0;z-index:60;
  border-top:1px solid var(--line);
  background:rgba(250,250,250,.92);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  transition:transform 280ms var(--ease); /* Ch55 */
}
.foot{
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  padding-top:16px;padding-bottom:18px;
  font-size:10.5px;font-weight:500;letter-spacing:.16em;text-transform:uppercase;color:var(--ink50);
}
.foot a{color:var(--ink);border-bottom:1px solid var(--line);padding-bottom:2px;transition:color var(--t),border-color var(--t)}
.foot a:hover{color:var(--accent);border-color:var(--accent)}

/* ---------- BUTTONS ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  border:1.5px solid var(--ink);padding:13px 24px;background:transparent;color:var(--ink);
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
}
.btn:hover{background:var(--ink);color:#fff;transform:translateY(-1px)}
.btn.solid{background:var(--ink);color:#fff}
.btn.solid:hover{background:var(--accent);border-color:var(--accent);box-shadow:0 8px 22px rgba(47,47,228,.28)}
.btn.ghost{border-color:var(--ink30);color:var(--ink70)}
.btn.ghost:hover{border-color:var(--accent);color:var(--accent);background:rgba(47,47,228,.05)}

/* ---------- REVEALS ---------- */
.rv{opacity:0;transform:translateY(22px);transition:opacity 480ms var(--ease),transform 480ms var(--ease)}
.rv.in{opacity:1;transform:none}

/* ============================================================
   ALL WORKS PAGE (works.html)
   ============================================================ */
.aw-hero{padding:150px 0 0;border-bottom:1px solid var(--line);position:relative;overflow:hidden}
.aw-hero .wrap{padding-bottom:40px;position:relative;z-index:2}
.aw-meta{
  margin-top:20px;font-size:10.5px;font-weight:500;letter-spacing:.22em;text-transform:uppercase;
  color:var(--ink50);line-height:2;
}
.fbar{display:flex;flex-wrap:wrap;gap:10px;margin:36px 0 30px}
.fbtn{
  font-family:inherit;font-size:12px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;
  padding:10px 18px;border:1px solid var(--line);background:var(--card);color:var(--ink70);cursor:pointer;
  transition:background var(--t),color var(--t),border-color var(--t);
}
.fbtn sup{color:var(--accent);margin-left:6px;font-size:10px;font-weight:600}
.fbtn:hover{border-color:var(--ink)}
.fbtn.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.fbtn.on sup{color:#fff}
.matrix{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));
  gap:clamp(16px,2vw,26px);padding-bottom:80px;
}
.cell{
  display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);
  transition:border-color var(--t),transform var(--t),box-shadow var(--t),opacity 200ms var(--ease);
}
.cell:hover{border-color:var(--accent);transform:translateY(-3px);box-shadow:0 14px 34px rgba(26,26,46,.07)}
.cell.f-pre{opacity:0;transform:translateY(24px) scale(.96)} /* Ch52: richer filter entry */
.cell.f-run{transition:opacity 500ms ease-out,transform 500ms ease-out}
.cell-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg2)}
.cell-media img{width:100%;height:100%;object-fit:cover;filter:grayscale(1);transition:filter var(--t),transform 400ms var(--ease)}
.cell:hover .cell-media img{filter:grayscale(0);transform:scale(1.03)}
.cell-idx{
  position:absolute;top:10px;left:12px;z-index:2;
  font-size:10px;font-weight:600;letter-spacing:.16em;color:#fff;background:var(--ink);
  padding:3px 7px;font-variant-numeric:tabular-nums;
}
/* Ch63: caption = fixed two-row layout — title row 1, category pinned bottom row 2 */
.cell-cap{
  flex:1;display:flex;flex-direction:column;align-items:flex-start;
  padding:14px 16px;border-top:1px solid var(--line);
}
.cell-title{font-size:13.5px;font-weight:500;letter-spacing:.03em;line-height:1.4}
.cell-title .award{color:var(--accent);margin-left:4px}
.cell-cat{margin-top:auto;padding-top:8px;font-size:9.5px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--ink50);white-space:nowrap}
/* audio source hint — third row on AUDIO cells */
.cell-src{
  font-size:9px;font-weight:600;letter-spacing:.2em;text-transform:uppercase;
  color:var(--accent);margin-top:4px;
}
/* audio cell — Ch44: inline player (play/pause/seek/download) */
.cell-audio .cell-media{
  display:flex;align-items:center;padding:0 18px;
  background:var(--bg2);
}
.aplayer{
  display:flex;align-items:center;gap:14px;width:100%;min-width:0;
}
.ap-btn{
  flex:none;width:44px;height:44px;border:1px solid var(--ink);background:var(--card);
  display:grid;place-items:center;cursor:pointer;padding:0;
  transition:background var(--t),border-color var(--t);
}
.ap-btn i{
  display:block;width:0;height:0;margin-left:3px;
  border-left:11px solid var(--ink);
  border-top:7px solid transparent;border-bottom:7px solid transparent;
  transition:border-color var(--t);
}
.aplayer.on .ap-btn i{
  width:9px;height:11px;margin-left:0;border:0;
  border-left:3.5px solid var(--accent);border-right:3.5px solid var(--accent);
}
.ap-btn:hover{background:var(--accent);border-color:var(--accent)}
.ap-btn:hover i{border-left-color:#fff}
.aplayer.on .ap-btn{border-color:var(--accent)}
.aplayer.on .ap-btn:hover i{border-left-color:#fff;border-right-color:#fff}
.ap-track{
  position:relative;flex:1;min-width:0;height:26px;cursor:pointer;
  touch-action:none;
}
.ap-track::before{
  content:'';position:absolute;left:0;right:0;top:50%;height:2px;margin-top:-1px;
  background:var(--ink30);
}
.ap-fill{
  position:absolute;left:0;right:0;top:50%;height:2px;margin-top:-1px;
  background:var(--accent);transform:scaleX(0);transform-origin:left center;
}
.ap-knob{
  position:absolute;top:50%;left:0;width:10px;height:10px;margin:-5px 0 0 -5px;
  background:var(--accent);transform:rotate(45deg);
  transition:opacity var(--t);opacity:0;
}
.aplayer:hover .ap-knob,.aplayer.on .ap-knob{opacity:1}
.ap-time{
  flex:none;font-family:var(--f-mono);font-size:10.5px;font-weight:500;letter-spacing:.06em;
  color:var(--ink50);font-variant-numeric:tabular-nums;white-space:nowrap;
}
.ap-time b{font-weight:500;color:inherit}
.ap-time .ap-dur{color:var(--ink30)}
.aplayer.on .ap-time .ap-cur{color:var(--accent)}
.ap-dl{
  flex:none;width:34px;height:34px;border:1px solid var(--line);background:var(--card);
  display:grid;place-items:center;font-size:14px;color:var(--ink);text-decoration:none;
  transition:color var(--t),border-color var(--t),background var(--t);
}
.ap-dl:hover{color:#fff;background:var(--accent);border-color:var(--accent)}
.wave{display:flex;align-items:center;gap:3px;height:52px;flex:1;min-width:0}
.wave i{
  flex:1;min-width:2px;max-width:4px;height:var(--h,40%);
  background:var(--ink30);transition:background var(--t),height var(--t);
}
.cell-audio:hover .wave i{background:var(--accent)}
.works-foot{
  padding:0 0 64px;font-size:11px;letter-spacing:.06em;color:var(--ink50);
}
.works-foot b{color:var(--ink)}

/* ============================================================
   RESPONSIVE — Ch9: 4 breakpoints
   Mobile <768px · Tablet 768–1023px · Desktop 1024–2559px · Ultra ≥2560px
   ============================================================ */

/* ---------- Tablet ---------- */
@media (max-width:1023px){
  :root{--gutter:clamp(28px,5vw,64px)} /* Ch20: wider gutter, no edge-hugging on iPad */
  html{scroll-padding-top:84px}
  .nav{height:66px}
  .nav-links{display:none}
  .menu-btn{display:flex}
  .hero-visual{width:100%;clip-path:none;opacity:.45}
  .contact-grid{grid-template-columns:1fr;gap:44px}
  .trk-grid{grid-template-columns:110px 1fr;row-gap:12px}
  .trk-meta{grid-column:2}
  .trk-loc{display:none}
  .sec-meta{margin-left:0;text-align:left;width:100%}
  .aw-hero{padding-top:120px}
}

/* ---------- Mobile ---------- */
@media (max-width:767px){
  body{font-size:14.5px}
  /* Ch6: topbar tightening — lang buttons narrower, hide logo sub-name, smaller gaps */
  .nav{gap:12px}
  .nav-right{gap:10px}
  .logo span{display:none}
  .lang-btn{min-width:34px}
  .nav-cv{padding:0 14px}
  /* Ch6: footer stacks vertically */
  .foot{flex-direction:column;align-items:flex-start;gap:10px}
  .hero-name{font-size:clamp(3rem,17vw,4.6rem)}
  .hero-foot{flex-direction:column;gap:6px}
  .hl-card{width:min(86vw,560px)} /* Ch25: near-full-bleed card on phones */
  .st-lbl{max-width:180px}
  .edu{grid-template-columns:64px 1fr}
  .texture-band{height:130px}
  .cv-row .btn{flex:1;justify-content:center}
  .matrix{grid-template-columns:1fr}
}

/* ---------- Ch6: extra-narrow phones — hide CV from topbar, mobile menu already carries links ---------- */
@media (max-width:560px){
  .nav-cv{display:none}
}

/* ---------- Ultra Wide ---------- */
@media (min-width:2560px){
  html{font-size:17px}
  .wrap{max-width:1600px}
  .hero-visual{width:52%}
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  .rv{opacity:1;transform:none}
}