@charset "utf-8";
/* ===========================================================
   AOML — dual theme (Lumen light / Noir dark)
   Follows the OS setting by default; html[data-theme="light"]
   or html[data-theme="dark"] forces one. Same markup classes
   and same ./img/... paths as before.
   =========================================================== */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500&display=swap');

/* ---------- LIGHT (default) ------------------------------- */
:root{
  color-scheme:light dark;
  --ink:#1d1d1f;
  --ink-2:#43454a;
  --ink-3:#86868b;
  --bg:#fbfbfd;
  --grad-top:#ffffff;
  --grad-bot:#fbfbfd;
  --panel:#ffffff;
  --panel-2:#f5f5f7;
  --hair:rgba(0,0,0,.09);
  --hair-2:rgba(0,0,0,.055);
  --blue:#0071e3;
  --blue-ink:#0058b0;
  --indigo:#5b53c8;
  --glow-a:rgba(0,113,227,.09);
  --glow-b:rgba(91,83,200,.07);
  --sel-bg:rgba(0,113,227,.16);
  --sel-ink:#1d1d1f;
  --header-bg:rgba(251,251,253,.72);
  --header-bg-2:rgba(251,251,253,.86);
  --header-shadow:rgba(0,0,0,.06);
  --nav-ink:#5f6168;
  --nav-hover-bg:rgba(0,0,0,.05);
  --nav-hover-ink:#1d1d1f;
  --dd-bg:rgba(255,255,255,.92);
  --dd-shadow:rgba(0,0,0,.12);
  --dd-hover-bg:rgba(0,113,227,.08);
  --dd-hover-ink:#0058b0;
  --sh-card:0 1px 2px rgba(0,0,0,.04),0 10px 30px rgba(0,0,0,.045);
  --sh-card-hover:0 2px 4px rgba(0,0,0,.05),0 20px 46px rgba(0,0,0,.09);
  --sh-photo:0 6px 18px rgba(0,0,0,.08);
  --sh-figure:0 18px 50px rgba(0,0,0,.12);
  --sh-img:0 8px 24px rgba(0,0,0,.07);
  --sh-img-hover:0 16px 36px rgba(0,0,0,.12);
  --sh-band:0 1px 2px rgba(0,0,0,.04),0 18px 50px rgba(0,0,0,.06);
  --band-top:#ffffff;
  --band-bot:#f4f7fb;
  --img-bg:#ffffff;
  --footer-bg:#f5f5f7;
  --credits:#9a9aa0;
  --row-hover:rgba(0,0,0,.025);
  --th-line:rgba(0,113,227,.35);
  --strip-op:.5;
  /* motion layer */
  --art-op:1;
  --art-filter:none;
  --art-body:#ffffff;
  --overlay-1:rgba(255,255,255,.46);
  --overlay-2:rgba(251,251,253,.80);
  --overlay-3:rgba(251,251,253,.95);
  --wash-a:rgba(0,113,227,.10);
  --wash-b:rgba(91,83,200,.09);
  --toggle-bg:rgba(0,0,0,.05);
  --toggle-ink:#5f6168;

  --radius:18px;
  --wrap:1120px;
  --sans:-apple-system,BlinkMacSystemFont,"Helvetica Neue",Helvetica,"PingFang TC","Microsoft JhengHei","Noto Sans TC",Arial,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,"SF Mono",Menlo,monospace;
}

/* ---------- DARK ------------------------------------------ */
@media (prefers-color-scheme:dark){
  html:not([data-theme="light"]){
    color-scheme:dark;
    --ink:#f2f3f5;
    --ink-2:#b9bcc4;
    --ink-3:#7f838d;
    --bg:#16181c;
    --grad-top:#1b1e24;
    --grad-bot:#101115;
    --panel:#1d2026;
    --panel-2:#23262d;
    --hair:rgba(255,255,255,.13);
    --hair-2:rgba(255,255,255,.075);
    --blue:#4fa3ff;
    --blue-ink:#8cc3ff;
    --indigo:#9a92ff;
    --glow-a:rgba(79,163,255,.16);
    --glow-b:rgba(154,146,255,.13);
    --sel-bg:rgba(79,163,255,.28);
    --sel-ink:#ffffff;
    --header-bg:rgba(18,20,24,.72);
    --header-bg-2:rgba(14,15,19,.88);
    --header-shadow:rgba(0,0,0,.5);
    --nav-ink:#a2a6af;
    --nav-hover-bg:rgba(255,255,255,.09);
    --nav-hover-ink:#ffffff;
    --dd-bg:rgba(26,29,35,.94);
    --dd-shadow:rgba(0,0,0,.55);
    --dd-hover-bg:rgba(79,163,255,.16);
    --dd-hover-ink:#cfe4ff;
    --sh-card:0 1px 2px rgba(0,0,0,.35),0 10px 30px rgba(0,0,0,.35);
    --sh-card-hover:0 2px 4px rgba(0,0,0,.4),0 20px 46px rgba(0,0,0,.5);
    --sh-photo:0 6px 18px rgba(0,0,0,.5);
    --sh-figure:0 18px 50px rgba(0,0,0,.6);
    --sh-img:0 8px 24px rgba(0,0,0,.45);
    --sh-img-hover:0 16px 36px rgba(0,0,0,.6);
    --sh-band:0 1px 2px rgba(0,0,0,.35),0 18px 50px rgba(0,0,0,.4);
    --band-top:#20242b;
    --band-bot:#181c22;
    --img-bg:#0e0f13;
    --footer-bg:#0e0f13;
    --credits:#6d717a;
    --row-hover:rgba(255,255,255,.04);
    --th-line:rgba(79,163,255,.45);
    --strip-op:.75;
    --art-op:.42;
    --art-filter:saturate(.85) contrast(1.05) brightness(.62);
    --art-body:#0d0e12;
    --overlay-1:rgba(16,17,21,.52);
    --overlay-2:rgba(22,24,28,.86);
    --overlay-3:rgba(16,17,21,.97);
    --wash-a:rgba(79,163,255,.20);
    --wash-b:rgba(154,146,255,.17);
    --toggle-bg:rgba(255,255,255,.09);
    --toggle-ink:#a2a6af;
  }
}
html[data-theme="dark"]{
  color-scheme:dark;
  --ink:#f2f3f5;
  --ink-2:#b9bcc4;
  --ink-3:#7f838d;
  --bg:#16181c;
  --grad-top:#1b1e24;
  --grad-bot:#101115;
  --panel:#1d2026;
  --panel-2:#23262d;
  --hair:rgba(255,255,255,.13);
  --hair-2:rgba(255,255,255,.075);
  --blue:#4fa3ff;
  --blue-ink:#8cc3ff;
  --indigo:#9a92ff;
  --glow-a:rgba(79,163,255,.16);
  --glow-b:rgba(154,146,255,.13);
  --sel-bg:rgba(79,163,255,.28);
  --sel-ink:#ffffff;
  --header-bg:rgba(18,20,24,.72);
  --header-bg-2:rgba(14,15,19,.88);
  --header-shadow:rgba(0,0,0,.5);
  --nav-ink:#a2a6af;
  --nav-hover-bg:rgba(255,255,255,.09);
  --nav-hover-ink:#ffffff;
  --dd-bg:rgba(26,29,35,.94);
  --dd-shadow:rgba(0,0,0,.55);
  --dd-hover-bg:rgba(79,163,255,.16);
  --dd-hover-ink:#cfe4ff;
  --sh-card:0 1px 2px rgba(0,0,0,.35),0 10px 30px rgba(0,0,0,.35);
  --sh-card-hover:0 2px 4px rgba(0,0,0,.4),0 20px 46px rgba(0,0,0,.5);
  --sh-photo:0 6px 18px rgba(0,0,0,.5);
  --sh-figure:0 18px 50px rgba(0,0,0,.6);
  --sh-img:0 8px 24px rgba(0,0,0,.45);
  --sh-img-hover:0 16px 36px rgba(0,0,0,.6);
  --sh-band:0 1px 2px rgba(0,0,0,.35),0 18px 50px rgba(0,0,0,.4);
  --band-top:#20242b;
  --band-bot:#181c22;
  --img-bg:#0e0f13;
  --footer-bg:#0e0f13;
  --credits:#6d717a;
  --row-hover:rgba(255,255,255,.04);
  --th-line:rgba(79,163,255,.45);
  --strip-op:.75;
  --art-op:.42;
  --art-filter:saturate(.85) contrast(1.05) brightness(.62);
  --art-body:#0d0e12;
  --overlay-1:rgba(16,17,21,.52);
  --overlay-2:rgba(22,24,28,.86);
  --overlay-3:rgba(16,17,21,.97);
  --wash-a:rgba(79,163,255,.20);
  --wash-b:rgba(154,146,255,.17);
  --toggle-bg:rgba(255,255,255,.09);
  --toggle-ink:#a2a6af;
}
html[data-theme="light"]{color-scheme:light}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;background:var(--bg)}
body{
  margin:0;color:var(--ink-2);
  font:400 16px/1.68 var(--sans);letter-spacing:-0.002em;
  -webkit-font-smoothing:antialiased;
  background:var(--bg);
}
img,embed,object,iframe,video{max-width:100%}
a{color:var(--blue);text-decoration:none;transition:color .15s ease}
a:hover{color:var(--blue-ink);text-decoration:none}
hr{border:0;border-top:1px solid var(--hair);margin:34px 0}
::selection{background:var(--sel-bg);color:var(--sel-ink)}

.page-container{
  width:100%;max-width:100%;overflow-x:hidden;
  background:
    radial-gradient(60vw 42vw at 78% -6%,var(--glow-a),transparent 70%),
    radial-gradient(52vw 40vw at 6% 4%,var(--glow-b),transparent 72%),
    linear-gradient(180deg,var(--grad-top) 0%,var(--bg) 46%,var(--grad-bot) 100%);
}

/* ---------- HEADER ---------------------------------------- */
.header{
  position:sticky;top:0;z-index:100;
  background:var(--header-bg);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid var(--hair-2);
}
.header-top{
  max-width:var(--wrap);margin:0 auto;padding:14px 24px 10px;
  display:flex;align-items:center;gap:16px;
}
a.sitelogo{
  flex:0 0 auto;display:block;width:42px;height:42px;
  background:url(../img/nthu-logo.png) center/contain no-repeat;
  opacity:1;text-indent:-9999px;overflow:hidden;
}
.sitename{min-width:0}
.sitename h1{margin:0;font:600 clamp(15px,2.1vw,20px)/1.25 var(--sans);letter-spacing:-0.02em}
.sitename h1 a{color:var(--ink);text-decoration:none}
.sitename h1 a:hover{color:var(--blue)}
.sitename h2{
  margin:3px 0 0;font:400 10.5px/1.3 var(--mono);
  letter-spacing:.22em;text-transform:uppercase;color:var(--ink-3);
}
.header-middle{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.sitemessage{font-size:13px;color:var(--ink-3)}
.header-middle:empty,.nav1:empty,.sitemessage:empty{display:none}

/* ---------- THEME TOGGLE ---------------------------------- */
.theme-toggle{
  margin-left:auto;flex:0 0 auto;
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 13px;border-radius:999px;border:1px solid var(--hair-2);
  background:var(--toggle-bg);color:var(--toggle-ink);
  font:500 10px/1 var(--mono);letter-spacing:.16em;text-transform:uppercase;
  cursor:pointer;white-space:nowrap;
  transition:color .16s ease,background .16s ease,border-color .16s ease;
}
.theme-toggle:hover{color:var(--nav-hover-ink);border-color:var(--hair)}
.theme-toggle span.dot{
  width:10px;height:10px;border-radius:50%;
  background:var(--ink-3);
  box-shadow:inset -3px -1px 0 0 var(--bg);
}
html[data-theme="dark"] .theme-toggle span.dot,
html[data-theme="light"] .theme-toggle span.dot{background:var(--blue)}
@media print{.theme-toggle{display:none}}
@media (max-width:560px){.theme-toggle span.label{display:none}.theme-toggle{padding:8px}}

/* ---------- NAV ------------------------------------------- */
.header-bottom{max-width:var(--wrap);margin:0 auto;padding:0 24px 5px}
.nav2{display:flex;flex-wrap:wrap;align-items:center;gap:2px}
.nav2 br{display:none}
.nav2 ul{list-style:none;margin:0;padding:0}
.nav2 > ul > li{position:relative}
.nav2 > ul > li > a{
  display:block;padding:9px 12px;border-radius:999px;
  font:500 11px/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;
  color:var(--nav-ink);white-space:nowrap;
  transition:color .16s ease,background .16s ease;
}
.nav2 > ul > li > a:hover{color:var(--nav-hover-ink);background:var(--nav-hover-bg)}
.nav2 > ul > li > ul{
  position:absolute;top:100%;left:0;min-width:250px;
  background:var(--dd-bg);
  -webkit-backdrop-filter:saturate(180%) blur(20px);backdrop-filter:saturate(180%) blur(20px);
  border:1px solid var(--hair);border-radius:14px;
  box-shadow:0 18px 44px var(--dd-shadow);
  padding:7px;opacity:0;visibility:hidden;transform:translateY(-5px);
  transition:opacity .17s ease,transform .17s ease,visibility .17s;
}
.nav2 > ul > li:hover > ul,.nav2 > ul > li:focus-within > ul{opacity:1;visibility:visible;transform:none}
.nav2 > ul > li > ul a{
  display:block;padding:9px 12px;border-radius:9px;
  font:400 13.5px/1.35 var(--sans);color:var(--ink-2);
}
.nav2 > ul > li > ul a:hover{background:var(--dd-hover-bg);color:var(--dd-hover-ink)}

/* ---------- MAIN ------------------------------------------ */
.main{max-width:var(--wrap);margin:0 auto;padding:0 24px 84px}
.main > br,.main-content > br{display:none}
.main-content{padding-top:clamp(44px,7vw,86px)}

h1.pagetitle{
  margin:0 0 clamp(30px,4vw,48px);
  font:600 clamp(32px,5.4vw,60px)/1.06 var(--sans);
  letter-spacing:-0.035em;color:var(--ink);text-wrap:balance;
}

.column1-unit,.column2-unit,.column2-unit-left,.column2-unit-right,
.column3-unit,.column1-unit-left{margin:0 0 26px}

h1.block{
  margin:52px 0 20px;padding-bottom:11px;
  border-bottom:1px solid var(--hair);
  font:500 11.5px/1.2 var(--mono);letter-spacing:.24em;
  text-transform:uppercase;color:var(--blue-ink);
}
.main-subcontent h1.block{margin-top:0}

.main-content h1:not(.pagetitle):not(.block){
  margin:0 0 7px;font:600 22px/1.3 var(--sans);
  letter-spacing:-0.022em;color:var(--ink);
}
.main-content h2{margin:0 0 9px;font:600 19px/1.35 var(--sans);letter-spacing:-0.02em;color:var(--ink)}
.main-content h3{
  margin:0 0 13px;font:400 11.5px/1.3 var(--mono);
  letter-spacing:.16em;text-transform:uppercase;color:var(--indigo);
}
.main-content h4{margin:0 0 16px;font:400 17.5px/1.72 var(--sans);color:var(--ink-2)}
.main-content h5{margin:0 0 14px;font:400 16px/1.72 var(--sans);color:var(--ink-2)}
.main-content p{margin:0 0 14px;color:var(--ink-2);text-wrap:pretty}
.main-content p:last-child{margin-bottom:0}
.main-content b,.main-content strong{color:var(--ink);font-weight:600}

.main-content ul{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:15px}
.main-content li{position:relative;padding-left:22px;color:var(--ink-2)}
.main-content li::before{
  content:"";position:absolute;left:3px;top:.66em;width:6px;height:6px;
  border-radius:50%;background:var(--blue);
}
.main-content ol{margin:0 0 14px;padding-left:22px;list-style:decimal}
.main-content ol li{padding-left:4px}
.main-content ol li::before{display:none}

/* ---------- CARDS ----------------------------------------- */
.main-subcontent{
  margin:0 0 14px;padding:24px 26px;
  background:var(--panel);border:1px solid var(--hair-2);
  border-radius:var(--radius);
  box-shadow:var(--sh-card);
}
.main-subcontent:has(> h1.block:first-child:last-child){
  background:none;border:0;padding:0;box-shadow:none;
}
.column1-unit:has(> h3){
  position:relative;overflow:hidden;
  padding:24px 26px;margin-bottom:13px;
  background:var(--panel);border:1px solid var(--hair-2);
  border-radius:var(--radius);
  box-shadow:var(--sh-card);
  transition:box-shadow .22s ease,transform .22s ease,border-color .22s ease;
}
.column1-unit:has(> h3)::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:2px;
  background:linear-gradient(180deg,var(--blue),var(--indigo));opacity:var(--strip-op);
}
.column1-unit:has(> h3):hover{
  border-color:var(--hair);
  box-shadow:var(--sh-card-hover);
  transform:translateY(-2px);
}

/* ---------- PEOPLE --------------------------------------- */
p.person{float:left;margin:0 24px 12px 0}
p.person img{
  display:block;width:120px;height:160px;object-fit:cover;
  border-radius:14px;background:var(--panel-2);padding:0;
  border:1px solid var(--hair);
  box-shadow:var(--sh-photo);
}
.main-subcontent:has(p.person){overflow:hidden}
.main-subcontent:has(p.person) br{line-height:0}

/* ---------- HOMEPAGE INTRO ------------------------------- */
.main-content_4{
  display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);
  gap:clamp(26px,4vw,56px);align-items:center;margin:0 0 52px;
}
.main-content_4 .column2-unit-right{margin:0;order:2}
.main-content_4 .column1-unit-left{margin:0;order:1}
.main-content_4 .column1-unit-left img,
.main-content_4 .column1-unit-left embed{
  width:100%!important;height:auto!important;display:block;
  border-radius:var(--radius);background:var(--panel-2);padding:0;
  border:1px solid var(--hair-2);
  box-shadow:var(--sh-figure);
}
.main-content_4 br{display:none}
.main-content_3{
  margin:0;padding:clamp(26px,4vw,40px);
  background:linear-gradient(180deg,var(--band-top) 0%,var(--band-bot) 100%);
  border:1px solid var(--hair-2);border-radius:24px;
  box-shadow:var(--sh-band);
}
.main-content_3 .column1-unit{margin:0}

/* ---------- FIGURES -------------------------------------- */
.main-content img{
  height:auto;border-radius:14px;
  background:var(--img-bg);padding:8px;
  border:1px solid var(--hair-2);
  box-shadow:var(--sh-img);
}
.main-content_4 .column1-unit-left img,p.person img{box-shadow:var(--sh-photo)}
.main-content a img{transition:transform .22s ease,box-shadow .22s ease}
.main-content a img:hover{transform:translateY(-2px);box-shadow:var(--sh-img-hover)}

/* ---------- TABLES --------------------------------------- */
.main-content table{width:100%;border-collapse:collapse;margin:0 0 24px;font-size:15px}
.main-content th{
  text-align:left;padding:11px 12px;border-bottom:1px solid var(--th-line);
  font:500 11.5px/1.3 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--blue-ink);
}
.main-content td{padding:13px 12px;border-bottom:1px solid var(--hair-2);vertical-align:top;color:var(--ink-2)}
.main-content tr:hover td{background:var(--row-hover)}

/* ---------- FOOTER --------------------------------------- */
.footer{
  border-top:1px solid var(--hair-2);margin-top:24px;
  padding:32px 24px 52px;text-align:center;
  background:var(--footer-bg);
}
.footer p{margin:0 0 6px;font:400 11.5px/1.7 var(--mono);letter-spacing:.08em;color:var(--ink-3)}
.footer p.credits{font-size:11px;color:var(--credits)}

/* ---------- RESPONSIVE ----------------------------------- */
@media (max-width:820px){
  .main-content_4{grid-template-columns:1fr}
  .header-top{padding:12px 18px 8px}
  .nav2 > ul > li > a{padding:8px 10px;font-size:11px}
  .nav2 > ul > li > ul{position:static;opacity:1;visibility:visible;transform:none;
    box-shadow:none;border:0;background:none;padding:0 0 0 12px;display:none}
  .nav2 > ul > li:hover > ul{display:block}
}
@media (max-width:560px){
  p.person{float:none;margin:0 0 14px}
  .main{padding:0 18px 60px}
}

@media (prefers-reduced-motion:reduce){
  *{transition:none!important}
}

/* ---------- PRINT (always light on paper) ----------------- */
@media print{
  html,body{background:#fff;color:#111}
  .page-container{background:none}
  .header{position:static;background:none}
  .nav2,.footer p.credits{display:none}
  .footer{background:none}
  .footer p,.main-content p,.main-content li,.main-content h4,.main-content h5,.main-content td{color:#222}
  .sitename h1 a,h1.pagetitle,.main-content h1,.main-content h2,.main-content b,.main-content strong{color:#000}
  h1.block,.main-content h3,.main-content th{color:#333}
  .main-content img{background:none;border:0;box-shadow:none}
  .main-subcontent,.column1-unit:has(> h3),.main-content_3{background:none;box-shadow:none;border:1px solid #ddd}
}