*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --cream:#FAF7F2;
  --cream2:#F2EDE4;
  --ink:#1E1810;
  --tan:#C4A87A;
  --sage:#6B9E85;
  --ocean:#3D7FAB;
  --rose:#C07868;
  --term-bg:#161310;
  --term-fg:#C8BBA0;
  --ink-rgb:30,24,16;
  --cream-rgb:250,247,242;
  --fs-h1:3rem;
  --fs-h2:2.3rem;
  --fs-h3:1.15rem;
  --fs-h4:.85rem;
  --fs-h5:.75rem;
}

[data-theme="dark"]{
  --cream:#10151D;
  --cream2:#161D28;
  --ink:#E7EEF8;
  --tan:#D3B37E;
  --sage:#88C0AD;
  --ocean:#79BFE7;
  --rose:#D58B7C;
  --term-bg:#0B1118;
  --term-fg:#C7D6E7;
  --ink-rgb:231,238,248;
  --cream-rgb:16,21,29;
}

html{scroll-behavior:smooth;cursor:none;font-size:16px;}
body{
  background:var(--cream);
  color:var(--ink);
  font-family:'Huninn',sans-serif;
  font-weight:400;
  line-height:1.7;
  overflow-x:hidden;
  --sb:calc(100vw - 100%);
}

/* CURSOR */
#cursor{
  position:fixed;width:10px;height:10px;
  background:var(--ink);border-radius:50%;
  pointer-events:none;z-index:9999;
  transform:translate(-50%,-50%);
  opacity:0;
}
#cursor-ring{
  position:fixed;width:38px;height:38px;
  border:1.5px solid rgba(var(--ink-rgb),.28);border-radius:50%;
  pointer-events:none;z-index:9998;
  transform:translate(-50%,-50%);
  transition:width .35s cubic-bezier(.34,1.56,.64,1),
             height .35s cubic-bezier(.34,1.56,.64,1),
             border-color .2s;
  opacity:0;
}
.cursor-hover #cursor-ring{width:58px;height:58px;border-color:var(--tan);}
.cursor-hover #cursor{background:var(--tan);}
.trail-dot{
  position:fixed;border-radius:50%;pointer-events:none;z-index:9996;
  background:rgba(61,127,171,.45);transform:translate(-50%,-50%);
}

/* NAV */
nav{
  position:fixed;top:0;left:0;right:0;z-index:500;
  display:flex;justify-content:flex-start;align-items:center;gap:1rem;
  padding:.75rem max(2rem, calc((100vw - var(--sb) - 1280px) / 2 + 2rem));
  backdrop-filter:blur(18px);
  background:rgba(var(--cream-rgb),.88);
  border-bottom:1px solid rgba(196,168,122,.1);
  transition:transform .35s ease,opacity .25s ease;
}
#navbar.nav-hidden{
  transform:translateY(calc(-100% - .75rem));
  opacity:0;
  pointer-events:none;
}
.nav-logo{
  text-decoration:none;color:var(--ink);letter-spacing:-.01em;
}
.nav-logo .a{color:var(--ocean);}
.nav-logo .b{color:var(--rose);}
.nav-links{display:flex;gap:2.5rem;list-style:none;margin-left:auto;}
.nav-links a{
  text-decoration:none;color:var(--ink);
  letter-spacing:.12em;text-transform:uppercase;opacity:.4;transition:opacity .2s;
}
.nav-links a:hover{opacity:1;}

/* HERO WRAP — extra scroll room for ball expansion */
#hero-wrap{
  position:relative;
  height:200lvh;
}

/* HERO */
#hero{
  position:sticky;top:0;
  height:100lvh;
  padding:4.5rem max(2rem, calc((100% - 1280px) / 2 + 2rem)) 4.5rem;
  box-sizing:border-box;
  display:grid;place-items:center;
  overflow:visible;
}

/* BALL OVERLAY — expands via clip-path on scroll */
#ball-overlay{
  position:fixed;
  top:0;left:0;right:0;
  height:100lvh;
  z-index:0;
  pointer-events:none;
  will-change:clip-path;
  background:var(--cream2);
  clip-path:circle(14rem at 92% 84%);
}

/* Sections must sit above the fixed overlay */
.section, footer{ position:relative; z-index:3; }
.hero-scroll{ position:absolute; z-index:2; bottom:calc(100lvh - 100svh); left:50%; transform:translateX(-50%); }
#hero{ z-index:2; }
.hero-content{position:relative;z-index:1;text-align:center;max-width:1100px;}

.hero-mono{
  display:block;
  color:var(--ocean);letter-spacing:.1em;margin-bottom:1.8rem;overflow:hidden;
}
.hero-mono span{display:inline-block;}

/* HEADINGS */
h1{font-size:var(--fs-h1);font-weight:400;line-height:1.1;letter-spacing:-.02em;}
h2{font-size:var(--fs-h2);font-weight:400;line-height:1.2;}
h3{font-size:var(--fs-h3);font-weight:400;}
h4{font-size:var(--fs-h4);font-weight:400;}
h5{font-size:var(--fs-h5);font-weight:400;}

.hero-title{
  font-family:'Huninn',sans-serif;
  min-height:calc(3 * 1.22em);
}
.hero-title .line{display:block;padding-bottom:.12em;}
.hero-title .ow{color:var(--ocean);}
.tw-cursor{
  display:inline-block;
  color:var(--tan);
  animation:tw-blink .7s step-end infinite;
}
@keyframes tw-blink{
  50%{opacity:0;}
}

.hero-sub{
  margin:1.8rem auto 0;
  color:rgba(var(--ink-rgb),.44);
}
.hero-chips{
  margin-top:1.8rem;display:flex;flex-wrap:wrap;
  gap:.45rem;justify-content:center;
}

.chip{
  display:inline-block;
  padding:.28rem .85rem;border-radius:2rem;
  letter-spacing:.04em;font-weight:400;
  border:1px solid rgba(var(--ink-rgb),.1);color:rgba(var(--ink-rgb),.45);
  transition:border-color .2s,color .2s;
}
.chip:hover{border-color:var(--tan);color:var(--tan);}
.hero-cta{margin-top:2.6rem;display:flex;gap:4rem;justify-content:center;align-items:center;}
.hero-cta .btn{min-width:13rem;text-align:center;}
.btn{
  display:inline-block;padding:.78rem 2.2rem;border-radius:2rem;
  font-size:var(--fs-h4);letter-spacing:.1em;text-transform:uppercase;
  text-decoration:none;border:none;cursor:none;font-family:'Huninn',sans-serif;
}
.btn-dark{background:var(--ink);color:var(--cream);}
.btn-outline{background:transparent;color:var(--ink);border:1px solid rgba(var(--ink-rgb),.2);}

.hero-scroll{
  display:flex;flex-direction:column;align-items:center;gap:.5rem;
}
.scroll-line{
  width:1px;height:48px;
  background:linear-gradient(to bottom,rgba(var(--ink-rgb),.35),transparent);
  animation:sdrop 2s ease-in-out infinite;
}
.scroll-txt{
  letter-spacing:.16em;color:rgba(var(--ink-rgb),.28);writing-mode:vertical-rl;
}
@keyframes sdrop{
  0%{transform:scaleY(0);transform-origin:top}
  50%{transform:scaleY(1);transform-origin:top}
  51%{transform:scaleY(1);transform-origin:bottom}
  100%{transform:scaleY(0);transform-origin:bottom}
}

.section-bridge{
  display:flex;flex-direction:column;align-items:center;gap:.5rem;
  padding:1.5rem 0 3rem;
}
.bridge-txt{
  letter-spacing:.22em;color:rgba(var(--ink-rgb),.18);font-size:.65rem;
}
.bridge-sub{
  letter-spacing:.16em;color:rgba(var(--ink-rgb),.3);font-size:.7rem;
  margin-bottom:.3rem;
}
.bridge-line{
  width:1px;height:56px;
  background:linear-gradient(to bottom,rgba(var(--ink-rgb),.3),transparent);
  animation:sdrop 2s ease-in-out infinite;
}

/* SECTIONS */
.section{padding:9rem max(2rem, calc((100% - 1280px) / 2 + 2rem));}
.s-label{
  color:var(--rose);
  letter-spacing:.16em;text-transform:uppercase;margin-bottom:.7rem;
}
.s-label::before{content:'// ';}
.s-title{
  font-family:'Huninn',sans-serif;
  margin-bottom:2rem;
}
.s-title .tline{display:block;overflow:hidden;}
.s-title .tword{display:inline-block;}

/* ABOUT */
#about{background:var(--cream2);}
.about-grid{display:grid;grid-template-columns:auto 1fr;gap:3rem;align-items:center;}
.about-card{
  background:var(--cream);border-radius:4px 28px 4px 28px;padding:2.4rem;
  border:1px solid rgba(196,168,122,.17);min-width:0;
}
.about-right{min-width:0;max-width:46rem;}
.hanzi-wrap{display:flex;gap:.7rem;margin-bottom:.9rem;}
.hanzi-item{display:flex;align-items:center;}
.hanzi-zhuyin{display:flex;align-items:flex-start;margin-left:3px;color:rgba(139,90,43,.5);}
.zhuyin-main{writing-mode:vertical-rl;letter-spacing:.08em;line-height:1;}
.zhuyin-tone{line-height:1;align-self:flex-start;}
.hanzi-grid{
  position:relative;width:64px;height:64px;
  border:1.5px solid rgba(139,90,43,.35);
  display:flex;align-items:center;justify-content:center;
}
.hanzi-grid::before,.hanzi-grid::after{content:'';position:absolute;}
.hanzi-grid::before{
  width:100%;height:1px;top:50%;
  background:repeating-linear-gradient(to right,rgba(139,90,43,.25) 0 3px,transparent 3px 6px);
}
.hanzi-grid::after{
  height:100%;width:1px;left:50%;
  background:repeating-linear-gradient(to bottom,rgba(139,90,43,.25) 0 3px,transparent 3px 6px);
}
.hanzi-char{font-size:var(--fs-h1);font-family:'Huninn',sans-serif;font-weight:400;letter-spacing:-.02em;color:var(--ink);line-height:1;position:relative;z-index:1;}
.about-handle{color:var(--ocean);margin-bottom:1.4rem;}
.fun-facts{display:flex;flex-direction:column;gap:.1rem;}
.fact{
  display:grid;grid-template-columns:3rem 1fr;column-gap:.5rem;
  color:rgba(var(--ink-rgb),.38);padding:.45rem 0;
  border-bottom:1px dashed rgba(196,168,122,.18);
}
.fact .label{color:rgba(var(--ink-rgb),.38);}
.fact .val{color:var(--sage);}
.about-right p{color:rgba(var(--ink-rgb),.57);margin-bottom:.9rem;line-height:1.8;}
.about-tagline{color:rgba(var(--ink-rgb),.3) !important;margin-top:.4rem !important;}

/* SKILLS */
#skills{background:var(--cream);overflow-x:clip;}
.skills-map-label{color:rgba(var(--ink-rgb),.35);letter-spacing:.08em;margin-bottom:.15rem;}
.skills-map-hint{color:rgba(var(--ink-rgb),.2);font-size:var(--fs-h5);margin-bottom:1rem;}
.skill-domains{display:flex;flex-direction:column;gap:.6rem;margin-bottom:2.8rem;}
.skill-row{display:grid;grid-template-columns:clamp(7rem,9vw,9.5rem) 1fr;align-items:flex-start;gap:1rem;}
.skill-label{color:rgba(var(--ink-rgb),.55);padding-top:.2rem;display:flex;align-items:center;gap:.4rem;}
.skill-tags{display:flex;flex-wrap:wrap;gap:.35rem;}
.stag{padding:.18rem .6rem;border:1px solid rgba(196,168,122,.35);border-radius:2px;color:rgba(var(--ink-rgb),.6);position:relative;}
.stag[data-tip]{cursor:none;}
.stag[data-tip].active{border-color:rgba(196,168,122,1);color:rgba(var(--ink-rgb),1);background:rgba(196,168,122,.12);}
.skill-desc{height:calc(3 * 2.4rem + 1.3rem);overflow:hidden;position:relative;margin-bottom:2rem;border-left:2px solid rgba(196,168,122,.28);padding-left:.9rem;width:100%;box-sizing:border-box;-webkit-mask-image:linear-gradient(to bottom,black calc(100% - 1.8rem),transparent 100%);mask-image:linear-gradient(to bottom,black calc(100% - 1.8rem),transparent 100%);}
.skill-desc-strip{display:flex;flex-direction:column;}
.skill-desc-item{height:2.4rem;display:flex;align-items:center;gap:.4rem;flex-shrink:0;overflow:hidden;}
.sdi-name{color:rgba(196,168,122,.85);font-size:var(--fs-h4);white-space:nowrap;flex-shrink:0;transition:font-size .1s ease;}
.sdi-name::after{content:' — ';}
.sdi-text{font-size:var(--fs-h4);color:rgba(var(--ink-rgb),.72);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0;transition:font-size .2s ease, color .2s ease;}
.skill-desc-item.sd-cur{height:auto;min-height:2.4rem;display:block;padding-top:.3rem;overflow:hidden;}
.skill-desc-item.sd-cur .sdi-name{display:inline;font-size:calc(var(--fs-h4) * 1.08);}
.skill-desc-item.sd-cur .sdi-text{display:inline;white-space:normal;overflow:visible;text-overflow:unset;font-size:calc(var(--fs-h4) * 1.08);color:rgba(var(--ink-rgb),.85);line-height:1.55;}

/* TERMINAL */
.terminal{
  background:var(--term-bg);border-radius:14px;overflow:hidden;
  box-shadow:0 28px 72px rgba(0,0,0,.22);
}
.term-bar{
  padding:.68rem 1rem;background:rgba(255,255,255,.04);
  display:flex;align-items:center;gap:.45rem;
  border-bottom:1px solid rgba(255,255,255,.04);
}
.dot{width:11px;height:11px;border-radius:50%;}
.dr{background:#FF5F57}.dy{background:#FEBC2E}.dg{background:#28C840}
.term-title{flex:1;text-align:center;color:rgba(255,255,255,.18);letter-spacing:.06em;}
.term-body{padding:2.2rem 1.8rem;line-height:1.75;}
.tp{color:#8EBB8E}.tc{color:var(--term-fg)}.tk{color:var(--rose)}
.tv{color:rgba(200,187,160,.55)}.tco{color:rgba(255,255,255,.32)}
.tcur{
  display:inline-block;width:7px;height:.82em;background:var(--term-fg);
  vertical-align:middle;margin-left:1px;animation:blink 1.1s step-end infinite;
}
@keyframes blink{0%,100%{opacity:1}50%{opacity:0}}
.term-body{max-height:520px;overflow-y:auto;cursor:text;color:var(--term-fg);}
.term-hint{
  color:rgba(80,65,45,.58);text-align:center;letter-spacing:.03em;
  font-size:var(--fs-h3);
  margin-top:0;padding:.55rem 1rem;
  will-change:clip-path,transform;
}
[data-theme="dark"] .term-hint{color:rgba(200,187,160,.72);}
.term-body::-webkit-scrollbar{width:5px;}
.term-body::-webkit-scrollbar-track{background:transparent;}
.term-body::-webkit-scrollbar-thumb{background:rgba(200,187,160,.15);border-radius:3px;}
.term-err{color:var(--rose);}
.term-warn{color:#FEBC2E;}
#terminal{transition:box-shadow .2s;box-shadow:0 28px 72px rgba(0,0,0,.22),0 0 0 1.5px rgba(196,168,122,.28);}
#terminal.focused{box-shadow:0 28px 72px rgba(0,0,0,.22),0 0 0 2px rgba(196,168,122,.7);}

/* DARK MODE TERMINAL */
[data-theme="dark"] .tv{color:rgba(180,200,225,.65);}
[data-theme="dark"] .tco{color:rgba(180,200,225,.48);}
[data-theme="dark"] .term-title{color:rgba(255,255,255,.32);}
[data-theme="dark"] .term-bar{border-bottom-color:rgba(255,255,255,.08);}

/* CERTS */
#certs{background:var(--cream2);overflow:hidden;}
.cert-grid{
  display:flex;
  flex-direction:row;
  gap:1rem;
  overflow-x:auto;
  padding-bottom:1rem;
  scroll-snap-type:x mandatory;
  -webkit-overflow-scrolling:touch;
}
.cert-grid::-webkit-scrollbar{display:none;}
.cert-grid{scrollbar-width:none;}
.cert-card{
  flex-shrink:0;
  width:250px;
  aspect-ratio:5/8;
  display:flex;flex-direction:column;
  border-radius:16px;overflow:hidden;
  background:var(--cream2);border:1px solid rgba(196,168,122,.13);
  cursor:none;
  scroll-snap-align:start;
  transition:transform .38s cubic-bezier(.34,1.56,.64,1),box-shadow .38s,border-color .2s;
}
.cert-card:hover{transform:translateY(-6px);box-shadow:0 20px 48px rgba(var(--ink-rgb),.09);}
.cert-card.active{border-color:var(--tan);}
.cert-thumb{
  width:100%;aspect-ratio:4/3;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(196,168,122,.18),rgba(192,120,104,.1));
  overflow:hidden;
}
.cert-thumb img{width:100%;height:100%;object-fit:cover;display:block;}
.cert-info{padding:1rem 1.1rem;flex:1;display:flex;flex-direction:column;}
.cert-expand-hint{
  display:flex;align-items:center;gap:.4rem;margin-top:auto;padding-top:.5rem;
  color:var(--tan);opacity:.7;font-size:var(--fs-h4);
}
.cert-card:hover .cert-expand-hint{opacity:1;}
.certs-header{
  display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:1.2rem;
}
.cert-nav-group{
  display:flex;gap:.5rem;align-items:center;flex-shrink:0;
}
.cert-nav{
  flex-shrink:0;
  width:2.4rem;height:2.4rem;
  border-radius:50%;border:1.5px solid rgba(196,168,122,.7);
  background:var(--cream2);color:var(--ink);
  font-size:1.4rem;line-height:1;
  display:flex;align-items:center;justify-content:center;
  cursor:none;
  transition:background .2s,border-color .2s,opacity .2s;
  opacity:.7;
}
.cert-nav:hover{background:var(--tan);border-color:var(--tan);color:#fff;opacity:1;}
.cert-scroll-wrap{position:relative;}
.cert-timeline{
  display:flex;align-items:center;gap:.6rem;
  margin-top:.9rem;pointer-events:none;
}
.cert-tl-line{
  flex:1;height:1px;background:rgba(196,168,122,.35);
}
.cert-tl-end{
  display:flex;align-items:center;gap:.45rem;flex-shrink:0;
  font-size:var(--fs-h4);font-weight:400;letter-spacing:.1em;
  color:var(--tan);opacity:.65;
}
.cert-tl-end::before{
  content:'';width:7px;height:7px;border-radius:50%;flex-shrink:0;
  background:var(--tan);opacity:.8;
  box-shadow:0 0 0 3px rgba(196,168,122,.18);
}
.cert-tl-end--old{
  flex-direction:row-reverse;
}
.cert-filter{
  display:inline-flex;align-items:center;gap:.55rem;
  margin-top:.75rem;cursor:none;user-select:none;
}
.cert-filter input{display:none;}
.cft-track{
  width:2.2rem;height:1.2rem;border-radius:999px;flex-shrink:0;
  background:rgba(var(--ink-rgb),.1);border:1.5px solid rgba(var(--ink-rgb),.15);
  position:relative;transition:background .25s,border-color .25s;
}
.cft-thumb{
  position:absolute;top:50%;left:.18rem;
  width:.8rem;height:.8rem;border-radius:50%;
  background:rgba(var(--ink-rgb),.3);
  transform:translateY(-50%);
  transition:left .25s cubic-bezier(.34,1.56,.64,1),background .25s;
}
.cert-filter:has(input:checked) .cft-track{background:var(--tan);border-color:var(--tan);}
.cert-filter:has(input:checked) .cft-thumb{left:calc(100% - .98rem);background:#fff;}
.cft-text{font-size:var(--fs-h4);color:rgba(var(--ink-rgb),.45);letter-spacing:.03em;transition:color .25s;}
.cert-filter:has(input:checked) .cft-text{color:var(--tan);}

/* CERT MODAL */
.proj-visual[data-img]{cursor:zoom-in;}
#lightbox-backdrop{
  position:fixed;inset:0;z-index:900;
  background:rgba(var(--ink-rgb),.6);
  backdrop-filter:blur(8px);
  opacity:0;pointer-events:none;
  transition:opacity .3s;
}
#lightbox-backdrop.open{opacity:1;pointer-events:all;}
#lightbox{
  position:fixed;inset:0;z-index:901;
  display:flex;align-items:center;justify-content:center;
  pointer-events:none;
  opacity:0;
  transition:opacity .3s;
}
#lightbox.open{opacity:1;pointer-events:all;}
#lightbox-img{
  max-width:90vw;max-height:88vh;
  object-fit:contain;
  border-radius:10px;
  box-shadow:0 20px 60px rgba(0,0,0,.4);
  transform:scale(.92);
  transition:transform .3s cubic-bezier(.34,1.2,.64,1);
}
#lightbox.open #lightbox-img{transform:scale(1);}
#lightbox-close{
  position:fixed;top:1.4rem;right:1.6rem;
  background:rgba(var(--ink-rgb),.15);
  border:1px solid rgba(var(--ink-rgb),.2);
  color:var(--cream);
  width:2.4rem;height:2.4rem;border-radius:50%;
  font-size:1rem;line-height:1;
  cursor:pointer;
  backdrop-filter:blur(4px);
  transition:background .2s,transform .2s;
}
#lightbox-close:hover{background:rgba(var(--ink-rgb),.3);transform:scale(1.1);}

#cert-modal-backdrop{
  position:fixed;inset:0;z-index:800;
  background:rgba(var(--ink-rgb),.45);
  backdrop-filter:blur(6px);
  opacity:0;pointer-events:none;
  transition:opacity .35s;
}
#cert-modal-backdrop.open{opacity:1;pointer-events:all;}
#cert-modal{
  position:fixed;
  bottom:0;left:0;right:0;
  z-index:801;
  background:var(--cream);
  border-radius:20px 20px 0 0;
  padding:2rem 2.5rem 3rem;
  max-height:85lvh;
  overflow-y:auto;
  scrollbar-width:none;
  transform:translateY(100%);
  max-width:700px;
  margin:0 auto;
  transition:background-color .3s;
}
#cert-modal::-webkit-scrollbar{display:none;}
.cert-modal-meta{
  color:rgba(var(--ink-rgb),.45);
  font-size:var(--fs-h5);
  letter-spacing:.04em;
  margin-top:.3rem;
  margin-bottom:1.5rem;
}
#cert-modal-content{
  display:flex;flex-direction:column;gap:1.6rem;
}
.cert-modal-section{
  display:flex;flex-direction:column;gap:.6rem;
}
.cert-section-title{
  font-size:var(--fs-h5);letter-spacing:.1em;text-transform:uppercase;
  color:var(--tan);opacity:.75;
  padding-bottom:.4rem;
  border-bottom:1px solid rgba(196,168,122,.15);
}
.cert-section-img{
  width:100%;border-radius:10px;
  border:1px solid rgba(196,168,122,.18);display:block;
}
.cert-grade-item{
  display:flex;align-items:baseline;gap:.55rem;
  color:rgba(var(--ink-rgb),.8);font-size:var(--fs-body);line-height:1.7;
}
.cert-grade-item::before{
  content:'';width:4px;height:4px;border-radius:50%;
  background:var(--tan);flex-shrink:0;margin-top:.6em;
}
.cert-modal-plain{
  line-height:1.85;color:rgba(var(--ink-rgb),.75);font-size:var(--fs-body);
}
.cert-modal-incomplete{
  font-size:var(--fs-body);color:rgba(var(--ink-rgb),.4);
  border:1.5px dashed rgba(var(--ink-rgb),.2);
  border-radius:.6rem;padding:.9rem 1.2rem;
  text-align:center;letter-spacing:.05em;
}
.cert-name{
  font-family:'Huninn',sans-serif;
  font-weight:400;margin-bottom:.3rem;
  line-height:1.4;height:1.4em;
  overflow:hidden;display:-webkit-box;-webkit-line-clamp:1;line-clamp:1;-webkit-box-orient:vertical;
}
.cert-tags{display:flex;flex-wrap:nowrap;gap:.3rem;margin-bottom:.4rem;height:1.6rem;overflow:hidden;align-items:center;}
.cert-tag{
  font-size:var(--fs-h5);font-weight:400;letter-spacing:.04em;flex-shrink:0;
  padding:.15rem .45rem;border-radius:999px;
  background:rgba(196,168,122,.15);color:var(--tan);
  border:1px solid rgba(196,168,122,.3);
  line-height:1.4;
}
.cert-issuer{
  color:var(--ocean);margin-bottom:.2rem;
  line-height:1.4;height:calc(1.4em * 2);
  overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;
}
.cert-date{
  color:rgba(var(--ink-rgb),.35);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}

/* PROJECTS */
#projects{background:var(--cream);padding-bottom:0;}
.proj-list{
  display:flex;flex-direction:column;gap:5rem;
  width:100%;
}
.proj-row{
  display:grid;
  grid-template-columns:58% 1fr;
  gap:3.5rem;
  align-items:center;
}
.proj-row.proj-row--reverse{grid-template-columns:1fr 58%;}
.proj-row.proj-row--reverse .proj-visual{order:2;}
.proj-row.proj-row--reverse .proj-body{order:1;}

.proj-visual{
  aspect-ratio:16/9;border-radius:14px;overflow:hidden;
  flex-shrink:0;
}
.proj-visual-inner{
  width:100%;height:100%;
  transition:transform .52s cubic-bezier(.34,1.2,.64,1);
}
.proj-row:hover .proj-visual-inner{transform:scale(1.035);}
.pt1{background:linear-gradient(135deg,rgba(61,127,171,.22),rgba(107,158,133,.15));}
.pt2{background:linear-gradient(135deg,rgba(192,120,104,.22),rgba(196,168,122,.15));}
.pt3{background:linear-gradient(135deg,rgba(107,158,133,.22),rgba(61,127,171,.14));}
.pt4{background:linear-gradient(135deg,rgba(196,168,122,.22),rgba(192,120,104,.14));}
.proj-visual-inner.pt1{background:url('../img/proj_old_website.png') center top / cover no-repeat;}
.proj-visual-inner.pt2{background:url('../img/proj_desktop_assistant.jpg') center center / cover no-repeat;}
.proj-visual-inner.pt3{background:url('../img/proj_model_training.png') center center / cover no-repeat;}
.proj-visual-inner.pt4{background:url('../img/proj_dreos_server.png') center center / cover no-repeat;}

.proj-body{display:flex;flex-direction:column;gap:.55rem;}
.proj-tag{color:var(--ocean);letter-spacing:.08em;}
.proj-name{
  font-family:'Huninn',sans-serif;font-weight:400;
  font-size:var(--fs-h2);line-height:1.2;margin-bottom:.1rem;
}
.proj-desc{color:rgba(var(--ink-rgb),.5);line-height:1.65;margin-bottom:.4rem;}

.proj-tline{
  display:flex;flex-direction:column;gap:0;
  margin:.6rem 0 .8rem;
  padding:.55rem 1rem .55rem 1.5rem;
  border-radius:8px;
  background:
    linear-gradient(to right,transparent 4px,rgba(196,168,122,.28) 4px,rgba(196,168,122,.28) 6px,transparent 6px),
    rgba(var(--ink-rgb),.03);
  max-height:18rem;
  overflow-y:auto;
  scrollbar-width:thin;
  scrollbar-color:rgba(196,168,122,.45) transparent;
  overscroll-behavior:contain;
  mask-image:linear-gradient(to bottom,transparent 0,black 2.2rem,black calc(100% - 2.2rem),transparent 100%);
  -webkit-mask-image:linear-gradient(to bottom,transparent 0,black 2.2rem,black calc(100% - 2.2rem),transparent 100%);
}
.proj-tline::-webkit-scrollbar{width:4px;}
.proj-tline::-webkit-scrollbar-track{background:transparent;}
.proj-tline::-webkit-scrollbar-thumb{background:rgba(196,168,122,.45);border-radius:2px;}
.proj-tline::-webkit-scrollbar-thumb:hover{background:rgba(196,168,122,.75);}
.proj-tline.tline-at-top{
  mask-image:linear-gradient(to bottom,black 0,black calc(100% - 2.2rem),transparent 100%);
  -webkit-mask-image:linear-gradient(to bottom,black 0,black calc(100% - 2.2rem),transparent 100%);
}
.proj-tline.tline-at-bottom{
  mask-image:linear-gradient(to bottom,transparent 0,black 2.2rem,black 100%);
  -webkit-mask-image:linear-gradient(to bottom,transparent 0,black 2.2rem,black 100%);
}
.proj-tline.tline-at-top.tline-at-bottom{
  mask-image:none;
  -webkit-mask-image:none;
}
.proj-tline-item{position:relative;padding-bottom:1rem;}
.proj-tline-item:last-child{padding-bottom:0;}
.proj-tline-item::before{
  content:'';position:absolute;
  left:calc(1px - 1.5rem);top:.38em;
  width:8px;height:8px;border-radius:50%;
  background:var(--cream);border:2px solid var(--tan);
  z-index:1;
}
.proj-tline-date{color:var(--rose);letter-spacing:.04em;display:block;margin-bottom:.12rem;}
.proj-tline-title{font-family:'Huninn',sans-serif;font-weight:400;margin-bottom:.1rem;}
.proj-tline-body{color:rgba(var(--ink-rgb),.45);line-height:1.55;}
.proj-tline-item--pause::before{background:transparent;border-style:dashed;opacity:.5;}
.proj-tline-item--pause .proj-tline-date{color:rgba(var(--ink-rgb),.35);}
.proj-tline-item--pause .proj-tline-title{color:rgba(var(--ink-rgb),.4);font-style:italic;}
.proj-tline-item--pause .proj-tline-body{color:rgba(var(--ink-rgb),.3);}
.proj-tline-item--wip::before{background:var(--rose);border-color:var(--rose);box-shadow:0 0 0 3px color-mix(in srgb,var(--rose) 20%,transparent);}
.proj-tline-item--wip .proj-tline-date{color:var(--rose);}
.proj-tline-item--wip .proj-tline-title{color:var(--rose);}
.proj-tline-item--xref::before{background:transparent;border-color:var(--ocean);border-style:dashed;}
.proj-tline-item--xref .proj-tline-date{color:var(--ocean);opacity:.7;}
.proj-tline-item--xref .proj-tline-title{color:var(--ocean);}
.proj-tline-item--xref .proj-tline-title::after{content:' ↗';font-size:.8em;}
.proj-tline-item--xref .proj-tline-body{color:rgba(var(--ink-rgb),.3);}

.proj-stacks{display:flex;flex-wrap:wrap;gap:.4rem;margin:.3rem 0;}

.proj-blog-link{
  display:inline-flex;align-items:center;gap:.3rem;
  color:var(--tan);text-decoration:none;
  margin-top:.5rem;position:relative;width:fit-content;
}
.proj-blog-link::after{
  content:'';position:absolute;bottom:-2px;left:0;
  width:0;height:1.5px;background:var(--tan);
  transition:width .3s cubic-bezier(.34,1,.64,1);
}
.proj-blog-link:hover::after{width:100%;}

.proj-toast{
  position:fixed;
  left:50%;
  bottom:2rem;
  transform:translateX(-50%);
  z-index:1300;
  padding:.62rem 1rem;
  border-radius:999px;
  background:rgba(var(--ink-rgb),.9);
  color:var(--cream);
  border:1px solid rgba(196,168,122,.35);
  letter-spacing:.04em;
  box-shadow:0 10px 26px rgba(0,0,0,.25);
  pointer-events:none;
  opacity:0;
}

@media(max-width:768px){
  .proj-toast{bottom:1.2rem;max-width:calc(100vw - 2rem);text-align:center;}
}

/* ════════════════════════════════════════
   SITE MAP
   ════════════════════════════════════════ */
#sitemap{
  position:relative;height:100lvh;overflow:hidden;
  background:radial-gradient(ellipse at 50% 52%,#0c1e38 0%,#060e1c 48%,#020609 100%);
  will-change:transform;
  transform:translateZ(0);
}
#sitemap::before{
  content:'';position:absolute;top:0;left:0;right:0;
  height:38vh;z-index:8;pointer-events:none;
  background:linear-gradient(to bottom,
    rgba(var(--cream-rgb),1) 0%,
    rgba(var(--cream-rgb),.6) 45%,
    rgba(var(--cream-rgb),0) 100%
  );
}
.smap-corner-label{
  position:absolute;top:5rem;left:2.2rem;z-index:10;pointer-events:none;
  font-family:'Huninn',sans-serif;font-size:var(--fs-h4);letter-spacing:.22em;
  font-weight:normal;margin:0;
  color:rgba(68,170,255,.35);
  transition:top 1s linear;
}
.smap-corner-label span{color:rgba(68,170,255,.65);}
/* When navbar is hidden (inside sitemap), label moves up to reclaim the space */
body.nav-hidden .smap-corner-label{
  top:1.5rem;
  transition-timing-function:cubic-bezier(0.550,0.055,0.675,0.190);
}

/* Sitemap-exclusive theme toggle button */
#smap-theme-btn{
  position:absolute;top:1.2rem;right:2rem;z-index:10;
  background:none;border:none;padding:0;cursor:none;
  font-size:1.25rem;font-family:'Huninn',sans-serif;
  color:rgba(68,170,255,.5);
  opacity:0;pointer-events:none;
  transition:opacity 0.35s ease,color 0.2s;
}
#smap-theme-btn::before{content:'☾';}
[data-theme="dark"] #smap-theme-btn::before{content:'☀';}
#smap-theme-btn:hover{color:rgba(68,170,255,1);}
body.nav-hidden #smap-theme-btn{opacity:1;pointer-events:auto;}

#smap-flash{
  position:fixed;inset:0;z-index:999;pointer-events:none;
  background:#fff;opacity:0;
}
#smap-viewport{position:absolute;inset:0;overflow:hidden;}
#smap-canvas{
  position:absolute;width:3000px;height:3000px;top:0;left:0;
  will-change:transform;
}
#smap-svg{
  position:absolute;inset:0;width:100%;height:100%;
  pointer-events:none;overflow:visible;
}
.smap-star{
  position:absolute;border-radius:50%;background:#fff;pointer-events:none;
  animation:smap-twinkle var(--dur,3s) ease-in-out var(--delay,0s) infinite alternate;
}
@keyframes smap-twinkle{from{opacity:var(--opA,.04);}to{opacity:var(--opB,.4);}}

/* ── Nodes ── */
.smap-node{
  position:absolute;transform:translate(-50%,-50%);
  background:rgba(6,13,26,.92);
  border:1px solid rgba(255,255,255,.07);
  border-radius:8px;padding:18px 22px;
  width:12rem;text-align:center;
  cursor:pointer;
  transition:border-color .3s,box-shadow .3s,opacity .4s,transform .22s;
}
.smap-node:hover{transform:translate(-50%,-50%) scale(1.04);}
.smap-node.current{
  border-color:color-mix(in srgb,var(--nc) 65%,transparent);
  box-shadow:0 0 0 1px color-mix(in srgb,var(--nc) 22%,transparent),
             0 0 38px color-mix(in srgb,var(--nc) 18%,transparent),
             inset 0 0 40px color-mix(in srgb,var(--nc) 4%,transparent);
}
.smap-node.connected{
  border-color:color-mix(in srgb,var(--nc) 32%,transparent);
  box-shadow:0 0 14px color-mix(in srgb,var(--nc) 10%,transparent);
}
.smap-node.dimmed{opacity:.18;pointer-events:none;}
.smap-node:not(.current) .smap-btns{opacity:.28;pointer-events:none;}
.smap-node:not(.current) .smap-btns button,
.smap-node:not(.current) .smap-btns a{cursor:not-allowed;filter:grayscale(.5);}

.smap-dot{
  width:5px;height:5px;border-radius:50%;
  background:var(--nc,#4af);
  box-shadow:0 0 6px var(--nc,#4af);
  margin:0 auto 10px;
}
.smap-dot.pulse{animation:smap-pulse 2s ease-in-out infinite;}
@keyframes smap-pulse{
  0%,100%{box-shadow:0 0 6px var(--nc,#4af),0 0 14px var(--nc,#4af);}
  50%{box-shadow:0 0 10px var(--nc,#4af),0 0 28px var(--nc,#4af),0 0 50px color-mix(in srgb,var(--nc) 28%,transparent);}
}
.smap-ntag{
  font-family:'Huninn',sans-serif;font-size:var(--fs-h4);letter-spacing:.12em;
  color:var(--nc,#4af);opacity:.65;margin-bottom:.55rem;
}
.smap-ntitle{
  font-family:'Huninn',sans-serif;font-size:var(--fs-h3);font-weight:400;
  color:rgba(215,232,255,.9);margin-bottom:.38rem;line-height:1.2;
}
.smap-nsub{font-family:'Huninn',sans-serif;font-size:var(--fs-h4);color:rgba(130,168,210,.42);line-height:1.55;margin-bottom:.95rem;}

/* ── Buttons ── */
.smap-btns{display:flex;flex-direction:column;gap:.26rem;}
.smap-nav-btn,.smap-back-btn,.smap-enter-btn,.smap-copy-btn{
  font-family:'Huninn',sans-serif;font-size:var(--fs-h4);
  padding:.36rem .75rem;border-radius:4px;width:100%;
  border:1px solid rgba(68,170,255,.2);background:rgba(68,170,255,.05);
  color:rgba(68,170,255,.78);cursor:pointer;letter-spacing:.06em;
  text-align:left;text-decoration:none;display:block;
  transition:background .16s,border-color .16s,transform .14s;
}
.smap-nav-btn:hover,.smap-copy-btn:hover{
  background:rgba(68,170,255,.13);border-color:rgba(68,170,255,.42);transform:translateX(2px);
}
.smap-back-btn{
  color:rgba(167,139,250,.72);border-color:rgba(167,139,250,.2);background:rgba(167,139,250,.05);
}
.smap-back-btn:hover{
  background:rgba(167,139,250,.12);border-color:rgba(167,139,250,.4);transform:translateX(-2px);
}
.smap-enter-btn{
  text-align:center;color:rgba(235,245,255,.88);
  border-color:color-mix(in srgb,var(--nc,#4af) 38%,transparent);
  background:color-mix(in srgb,var(--nc,#4af) 9%,transparent);
}
.smap-enter-btn:hover:not([disabled]){
  background:color-mix(in srgb,var(--nc,#4af) 17%,transparent);
  border-color:color-mix(in srgb,var(--nc,#4af) 62%,transparent);
  transform:none;
}
.smap-enter-btn[disabled]{opacity:.35;cursor:not-allowed;}

@keyframes smap-flow{to{stroke-dashoffset:-66;}}

/* ── HUD ── */
#smap-hud{
  position:absolute;bottom:2rem;left:50%;transform:translateX(-50%);
  display:flex;align-items:center;gap:.65rem;z-index:10;pointer-events:none;
  font-family:'Huninn',sans-serif;font-size:.62rem;letter-spacing:.14em;
  color:rgba(68,170,255,.38);
}
#smap-trail{display:flex;gap:.38rem;align-items:center;}
.smap-trail-dot{
  width:5px;height:5px;border-radius:50%;background:rgba(68,170,255,.28);
  transition:background .3s,box-shadow .3s;
}
.smap-trail-dot.active{background:rgba(68,170,255,.88);box-shadow:0 0 6px rgba(68,170,255,.65);}
#smap-hud-label{color:rgba(68,170,255,.72);font-weight:700;}
.smap-hud-sep{color:rgba(68,170,255,.28);}

/* ════════════════════════════════════════
   SITE MAP — LIGHT MODE
   ════════════════════════════════════════ */
[data-theme="light"] #sitemap{
  background:radial-gradient(ellipse at 50% 52%,#ccdff2 0%,#e4eff8 42%,#f2f7fc 100%);
}
[data-theme="light"] .smap-corner-label{color:rgba(20,60,120,.28);}
[data-theme="light"] .smap-corner-label span{color:rgba(20,75,160,.55);}

/* Stars hidden in light mode — concept doesn't translate to light backgrounds */
[data-theme="light"] .smap-star{display:none;}

/* Node cards */
[data-theme="light"] .smap-node{
  background:rgba(252,255,255,.92);
  border-color:rgba(30,70,140,.1);
  box-shadow:0 2px 18px rgba(20,55,110,.07);
}
[data-theme="light"] .smap-node:hover{
  box-shadow:0 4px 24px rgba(20,55,110,.12);
}
[data-theme="light"] .smap-node.current{
  border-color:color-mix(in srgb,var(--nc) 60%,transparent);
  box-shadow:0 0 0 1px color-mix(in srgb,var(--nc) 30%,transparent),
             0 0 36px color-mix(in srgb,var(--nc) 26%,transparent),
             inset 0 0 32px color-mix(in srgb,var(--nc) 6%,transparent);
}
[data-theme="light"] .smap-node.connected{
  border-color:color-mix(in srgb,var(--nc) 32%,transparent);
  box-shadow:0 0 16px color-mix(in srgb,var(--nc) 14%,transparent);
}
[data-theme="light"] .smap-node.dimmed{opacity:.14;}

/* Node text */
[data-theme="light"] .smap-ntitle{color:rgba(12,28,65,.9);}
[data-theme="light"] .smap-nsub{color:rgba(25,55,110,.38);}
[data-theme="light"] .smap-ntag{opacity:.75;}

/* Dot pulse stays same color (var(--nc)), shadow softened */
[data-theme="light"] .smap-dot{box-shadow:0 0 5px color-mix(in srgb,var(--nc) 55%,transparent);}

/* Buttons */
[data-theme="light"] .smap-nav-btn,
[data-theme="light"] .smap-copy-btn{
  border-color:rgba(25,75,160,.16);
  background:rgba(25,75,160,.04);
  color:rgba(18,65,140,.82);
}
[data-theme="light"] .smap-nav-btn:hover,
[data-theme="light"] .smap-copy-btn:hover{
  background:rgba(25,75,160,.09);
  border-color:rgba(25,75,160,.34);
}
[data-theme="light"] .smap-back-btn{
  color:rgba(88,52,160,.72);
  border-color:rgba(88,52,160,.16);
  background:rgba(88,52,160,.04);
}
[data-theme="light"] .smap-back-btn:hover{
  background:rgba(88,52,160,.09);
  border-color:rgba(88,52,160,.36);
}
[data-theme="light"] .smap-enter-btn{
  color:rgba(12,28,65,.88);
}

/* HUD */
[data-theme="light"] #smap-hud{color:rgba(18,58,120,.35);}
[data-theme="light"] .smap-trail-dot{background:rgba(18,58,120,.22);}
[data-theme="light"] .smap-trail-dot.active{
  background:rgba(18,75,175,.72);
  box-shadow:0 0 5px rgba(18,75,175,.38);
}
[data-theme="light"] #smap-hud-label{color:rgba(18,68,155,.68);font-weight:700;}
[data-theme="light"] .smap-hud-sep{color:rgba(18,58,120,.22);}

#smap-footer{
  position:absolute;bottom:2rem;right:2.2rem;z-index:10;
  display:flex;flex-direction:column;align-items:flex-end;gap:.5rem;
}
#smap-footer-panel,#smap-footer-license{
  background:rgba(6,13,26,.92);border:1px solid rgba(68,170,255,.2);
  border-radius:8px;padding:14px 18px;backdrop-filter:blur(12px);
  font-family:'Huninn',sans-serif;font-size:var(--fs-h5);letter-spacing:.08em;
  color:rgba(68,170,255,.7);line-height:2;text-align:left;
  max-height:0;overflow:hidden;opacity:0;padding-top:0;padding-bottom:0;
  transition:max-height .35s ease,opacity .28s ease,padding .35s ease;
}
#smap-footer-panel.open{
  max-height:8rem;opacity:1;
  padding-top:14px;padding-bottom:14px;
}
#smap-footer-license.open{
  max-height:12rem;opacity:1;
  padding-top:14px;padding-bottom:14px;
}
.smap-copyright{
  font-family:'Huninn',sans-serif;font-size:var(--fs-h5);letter-spacing:.18em;
  color:rgba(68,170,255,.55);cursor:pointer;
  display:flex;align-items:flex-end;flex-direction:column;gap:.15rem;
  transition:color .2s;
}
.smap-copyright-hint{
  font-size:.65rem;letter-spacing:.1em;opacity:.5;
  transition:opacity .28s ease,max-height .28s ease;
  max-height:2em;overflow:hidden;
}
#smap-footer.open .smap-copyright-hint{opacity:0;max-height:0;}
.smap-copyright-main{display:flex;align-items:center;gap:.45rem;}
.smap-copyright-main::before{
  content:'▸';font-size:var(--fs-h3);
  transition:transform .28s ease,opacity .2s;
  opacity:.6;
}
#smap-footer.open .smap-copyright-main::before{transform:rotate(90deg);opacity:1;}
.smap-copyright:hover{color:rgba(68,170,255,.9);}
[data-theme="light"] .smap-copyright{color:rgba(18,58,120,.48);}
[data-theme="light"] .smap-copyright:hover{color:rgba(18,58,120,.85);}
[data-theme="light"] #smap-footer-panel,[data-theme="light"] #smap-footer-license{
  background:rgba(240,246,255,.92);border-color:rgba(18,58,120,.18);
  color:rgba(18,58,120,.6);
}

/* HAMBURGER BUTTON — hidden on desktop */
.nav-hamburger{
  display:none;flex-direction:column;justify-content:space-between;
  width:24px;height:18px;background:none;border:none;cursor:pointer;padding:0;
}
.nav-hamburger span{
  display:block;width:100%;height:2px;background:var(--ink);
  border-radius:2px;transition:transform .3s ease, opacity .3s ease;
}
/* X animation when open */
.nav-hamburger.open span:nth-child(1){transform:translateY(8px) rotate(45deg);}
.nav-hamburger.open span:nth-child(2){opacity:0;}
.nav-hamburger.open span:nth-child(3){transform:translateY(-8px) rotate(-45deg);}

/* MOBILE MENU */
#mobile-menu{
  display:none;
  position:fixed;top:0;left:0;right:0;bottom:0;
  background:var(--cream);z-index:90;
  flex-direction:column;align-items:center;justify-content:center;
}
#mobile-menu.open{display:flex;}
#mobile-menu ul{list-style:none;margin:0;padding:0;text-align:center;}
#mobile-menu ul li{margin:1.4rem 0;}
#mobile-menu ul li a{
  font-family:'Huninn',sans-serif;
  color:var(--ink);text-decoration:none;letter-spacing:.04em;
}

@media(max-width:1100px){
  .proj-row,.proj-row.proj-row--reverse{
    grid-template-columns:1fr;gap:1.6rem;
  }
  .proj-row.proj-row--reverse .proj-visual,
  .proj-row.proj-row--reverse .proj-body{order:unset;}
}
@media(max-width:768px){
  nav{padding:1rem 1.2rem;justify-content:flex-start;gap:1.5rem;}.nav-links{display:none;}
  .nav-logo{flex:1;}
  .nav-theme-btn{margin-left:0;}
  .nav-hamburger{display:flex;}
  .section{padding:4rem 1.2rem;}

  /* hero */
  #hero{padding:4.5rem 1.4rem;}
  .hero-sub{margin-top:1.2rem;}
  .hero-chips{margin-top:1.2rem;gap:.35rem;}
  .chip{padding:.22rem .7rem;}
  .hero-cta{margin-top:1.8rem;flex-direction:column;align-items:center;gap:.7rem;}
  .btn{width:100%;text-align:center;}
  .hero-mono{margin-bottom:1.2rem;}

  /* about: single column */
  .about-grid{grid-template-columns:1fr;gap:1.8rem;}
  .about-card{padding:1.6rem;}
  .fact{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
  .about-right p{line-height:1.7;}

  /* skills: label stack on mobile */
  .skill-row{grid-template-columns:1fr;gap:.25rem;}
  .skill-label{padding-top:0;}

  /* projects: 手機版上圖下文，無左右交替 */
  .proj-list{gap:3rem;}
  .proj-row,.proj-row.proj-row--reverse{
    grid-template-columns:1fr;gap:1.2rem;
  }
  .proj-row.proj-row--reverse .proj-visual,
  .proj-row.proj-row--reverse .proj-body{order:unset;}
  .proj-visual{border-radius:10px;}

  .nav-theme-btn{cursor:pointer;}
}

@media(max-width:767px){
  #smap-hud{left:2.2rem;transform:none;}
}
@media(max-width:400px){h1{font-size:2.2rem;}}
@media(min-width:768px){html{font-size:15px;}}
@media(min-width:1440px){html{font-size:19px;}.cert-card{width:300px;}#cert-modal{max-width:1000px;}}
@media(min-width:2000px){html{font-size:22px;}.hanzi-char{font-size:2.5rem;}.section{padding-left:max(2rem, calc((100% - 1600px) / 2 + 2rem));padding-right:max(2rem, calc((100% - 1600px) / 2 + 2rem));}nav{padding-left:max(2rem, calc((100vw - var(--sb) - 1600px) / 2 + 2rem));padding-right:max(2rem, calc((100vw - var(--sb) - 1600px) / 2 + 2rem));}.cert-name,.cert-issuer{font-size:0.85rem;}#cert-modal{max-width:1300px;}}
@media(max-height:768px){#hero{align-items:start;padding-top:5rem;}}


/* Close hint in modal */
.modal-close-hint{
  display:flex;align-items:center;justify-content:flex-end;
  margin-bottom:1.2rem;
  color:rgba(var(--ink-rgb),.3);letter-spacing:.06em;
  gap:.4rem;
}
.modal-close-hint::before{
  content:'↑ 點外側關閉';
}

/* THEME TOGGLE BUTTON */
.nav-theme-btn{
  background:none;border:none;padding:0;
  cursor:none;color:var(--ink);
  font-size:1.25rem;font-family:'Huninn',sans-serif;
  opacity:.4;flex-shrink:0;
  margin-left:1.5rem;
  transform:translateY(-1.9px);
  transition:opacity .2s,color .2s;
}
.nav-theme-btn:hover{opacity:1;color:var(--tan);}
.nav-theme-btn::before{content:'☾';}
[data-theme="dark"] .nav-theme-btn::before{content:'☀';}

/* THEME TRANSITIONS */
body,nav,.section,footer,
.about-card,.cert-card,
#mobile-menu,#ball-overlay{
  transition:background-color .3s;
}

/* DARK MODE SPECIFIC OVERRIDES */

/* Flash overlay becomes black in dark mode */
[data-theme="dark"] #smap-flash{
  background:#000;
}


/* Deepen layered surfaces for clearer hierarchy in dark mode */
[data-theme="dark"] #about,
[data-theme="dark"] #certs{
  background:#121923;
}

[data-theme="dark"] .about-card,
[data-theme="dark"] .cert-card,
[data-theme="dark"] #cert-modal,
[data-theme="dark"] #mobile-menu{
  background:#151E2A;
}

[data-theme="dark"] .hanzi-zhuyin{
  color:rgba(121,191,231,.55);
}

[data-theme="dark"] .hanzi-grid{
  border-color:rgba(121,191,231,.36);
}

[data-theme="dark"] .hanzi-grid::before{
  background-image:repeating-linear-gradient(to right,rgba(121,191,231,.24) 0 3px,transparent 3px 6px);
}

[data-theme="dark"] .hanzi-grid::after{
  background-image:repeating-linear-gradient(to bottom,rgba(121,191,231,.24) 0 3px,transparent 3px 6px);
}