@import url("../fonts/fonts.css");

/* ============================================================
   LBN — Laboratory of Bio-Physio Sensors & Nanobioengineering
   Design system
   ============================================================ */

:root{
  /* ---- type ---- */
  --font-display:"IBM Plex Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body:"IBM Plex Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-serif:"IBM Plex Serif", ui-serif, Georgia, "Times New Roman", serif;
  --font-mono:ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  /* ---- palette: dark (default) ---- */
  --ink:#05070b;
  --bg:#070910;
  --bg-2:#0b0e17;
  --bg-3:#111524;
  --surface:rgba(255,255,255,.035);
  --surface-2:rgba(255,255,255,.06);
  --line:rgba(255,255,255,.10);
  --line-2:rgba(255,255,255,.17);
  --fg:#eef1f8;
  --fg-2:#b3bccf;
  --fg-3:#7d879e;
  --accent:#4f9bff;
  --accent-2:#25e0d0;
  --accent-3:#a78bfa;
  --warn:#ffb454;
  --glow:rgba(79,155,255,.42);
  --shadow:0 1px 2px rgba(0,0,0,.5), 0 12px 40px -12px rgba(0,0,0,.75);
  --shadow-lg:0 2px 4px rgba(0,0,0,.5), 0 40px 80px -24px rgba(0,0,0,.85);
  --ring:0 0 0 1px rgba(255,255,255,.09);
  --grid-line:rgba(255,255,255,.045);
  --photo-filter:saturate(1.02) contrast(1.02);
  --scrim:linear-gradient(180deg,rgba(7,9,16,0) 0%,rgba(7,9,16,.72) 60%,rgba(7,9,16,.95) 100%);

  /* ---- metrics ---- */
  --page:1240px;
  --page-wide:1480px;
  --gut:clamp(20px,4.4vw,64px);
  --r-xs:6px; --r-sm:10px; --r:16px; --r-lg:24px; --r-xl:34px;
  --nav-h:70px;
  --ease:cubic-bezier(.22,1,.36,1);
  --ease-io:cubic-bezier(.65,.05,.36,1);
  --dur:.62s;
}

html[data-theme="light"]{
  --ink:#0a0d14;
  --bg:#f7f8fb;
  --bg-2:#ffffff;
  --bg-3:#eef1f7;
  --surface:rgba(10,13,20,.028);
  --surface-2:rgba(10,13,20,.055);
  --line:rgba(10,13,20,.115);
  --line-2:rgba(10,13,20,.2);
  --fg:#0b0f18;
  --fg-2:#3f4859;
  --fg-3:#6b7488;
  --accent:#1a63d8;
  --accent-2:#0d9488;
  --accent-3:#7c3aed;
  --warn:#b45309;
  --glow:rgba(26,99,216,.26);
  --shadow:0 1px 2px rgba(12,18,32,.06), 0 12px 30px -14px rgba(12,18,32,.24);
  --shadow-lg:0 2px 4px rgba(12,18,32,.05), 0 40px 70px -28px rgba(12,18,32,.3);
  --ring:0 0 0 1px rgba(10,13,20,.08);
  --grid-line:rgba(10,13,20,.05);
  --photo-filter:saturate(1.02);
  --scrim:linear-gradient(180deg,rgba(247,248,251,0) 0%,rgba(247,248,251,.7) 60%,rgba(247,248,251,.96) 100%);
}

*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--nav-h) + 24px);
  color-scheme:dark;
}
html[data-theme="light"]{color-scheme:light}

body{
  margin:0;
  background:var(--bg);
  color:var(--fg);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  font-feature-settings:"cv05" 1,"ss01" 1;
  overflow-x:hidden;
}

img,svg,video{max-width:100%;display:block}
img{height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
::selection{background:var(--accent);color:#fff}

/* ---------- typography ---------- */
h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:600;
  line-height:1.06;
  letter-spacing:-.028em;
  margin:0;
  text-wrap:balance;
}
h1{font-size:clamp(2.6rem,6.4vw,5.2rem)}
h2{font-size:clamp(1.9rem,3.9vw,3.1rem)}
h3{font-size:clamp(1.22rem,2vw,1.62rem);letter-spacing:-.02em}
h4{font-size:1.02rem;letter-spacing:-.01em;font-weight:600}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}

.eyebrow{
  font-family:var(--font-display);
  font-size:.7rem;
  font-weight:600;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--accent);
  display:flex;
  align-items:center;
  gap:.7em;
  margin:0 0 1.1rem;
}
.eyebrow::before{
  content:"";width:26px;height:1px;flex:none;
  background:linear-gradient(90deg,var(--accent),transparent);
}
.eyebrow.center{justify-content:center}
.eyebrow.center::after{content:"";width:26px;height:1px;background:linear-gradient(270deg,var(--accent),transparent)}

.lede{font-size:clamp(1.02rem,1.5vw,1.2rem);line-height:1.65;color:var(--fg-2);max-width:66ch;text-wrap:pretty}
.muted{color:var(--fg-3)}
.serif{font-family:var(--font-serif);font-weight:400;letter-spacing:0}
.mono{font-family:var(--font-mono);font-size:.82em;letter-spacing:-.01em}

/* ---------- layout ---------- */
.wrap{width:min(100% - var(--gut)*2, var(--page));margin-inline:auto}
.wrap-wide{width:min(100% - var(--gut)*2, var(--page-wide));margin-inline:auto}
.section{padding-block:clamp(64px,9vw,132px);position:relative}
.section-head{max-width:72ch;margin-bottom:clamp(34px,4.4vw,60px)}
.section-head.center{margin-inline:auto;text-align:center}
.section-head h2 + .lede{margin-top:1.1rem}

.grid{display:grid;gap:clamp(16px,2vw,26px)}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
.auto-260{grid-template-columns:repeat(auto-fill,minmax(min(100%,260px),1fr))}
.auto-300{grid-template-columns:repeat(auto-fill,minmax(min(100%,300px),1fr))}
.auto-340{grid-template-columns:repeat(auto-fill,minmax(min(100%,340px),1fr))}
@media(max-width:900px){.g3,.g4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:620px){.g2,.g3,.g4{grid-template-columns:1fr}}

.rule{height:1px;background:var(--line);border:0;margin:0}

/* fine technical grid backdrop */
.grid-bg{position:relative;isolation:isolate}
.grid-bg::before{
  content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background-image:linear-gradient(var(--grid-line) 1px,transparent 1px),
                   linear-gradient(90deg,var(--grid-line) 1px,transparent 1px);
  background-size:72px 72px;
  mask-image:radial-gradient(ellipse 90% 70% at 50% 0%,#000 25%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse 90% 70% at 50% 0%,#000 25%,transparent 78%);
}

/* ============================================================
   Nav
   ============================================================ */
.nav{
  position:fixed;inset:0 0 auto;z-index:120;height:var(--nav-h);
  display:flex;align-items:center;
  transition:background .45s var(--ease),backdrop-filter .45s var(--ease),border-color .45s var(--ease);
  border-bottom:1px solid transparent;
}
.nav.solid{
  background:color-mix(in oklab,var(--bg) 82%,transparent);
  backdrop-filter:saturate(1.6) blur(18px);
  -webkit-backdrop-filter:saturate(1.6) blur(18px);
  border-bottom-color:var(--line);
}
.nav-inner{width:min(100% - var(--gut)*2,var(--page-wide));margin-inline:auto;display:flex;align-items:center;gap:22px}
.brand{display:flex;align-items:center;gap:12px;flex:none;color:var(--fg)}
.brand svg{height:30px;width:auto;transition:transform .5s var(--ease)}
.brand:hover svg{transform:translateY(-1px) scale(1.02)}
.brand-txt{display:none;line-height:1.12}
.brand-txt b{font-family:var(--font-display);font-size:.79rem;font-weight:600;letter-spacing:.02em;display:block}
.brand-txt span{font-size:.62rem;letter-spacing:.1em;text-transform:uppercase;color:var(--fg-3)}
@media(min-width:1120px){.brand-txt{display:block}}

.nav-links{display:none;align-items:center;gap:2px;margin-left:auto}
@media(min-width:1000px){.nav-links{display:flex}}
.nav-links a{
  position:relative;padding:8px 12px;border-radius:var(--r-xs);
  font-size:.845rem;font-weight:500;color:var(--fg-2);
  transition:color .3s var(--ease),background .3s var(--ease);
}
.nav-links a:hover{color:var(--fg);background:var(--surface)}
.nav-links a.active{color:var(--fg)}
.nav-links a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
}
.nav-actions{display:flex;align-items:center;gap:8px;margin-left:auto}
@media(min-width:1000px){.nav-actions{margin-left:0}}

.icon-btn{
  width:38px;height:38px;display:grid;place-items:center;flex:none;
  background:var(--surface);border:1px solid var(--line);border-radius:10px;
  cursor:pointer;transition:.3s var(--ease);
}
.icon-btn:hover{background:var(--surface-2);border-color:var(--line-2);transform:translateY(-1px)}
.icon-btn svg{width:17px;height:17px}
.theme-btn .moon{display:none}
html[data-theme="light"] .theme-btn .sun{display:none}
html[data-theme="light"] .theme-btn .moon{display:block}
.menu-btn{display:grid}
@media(min-width:1000px){.menu-btn{display:none}}

/* mobile drawer */
.drawer{
  position:fixed;inset:0;z-index:130;display:grid;
  background:color-mix(in oklab,var(--bg) 96%,transparent);
  backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px);
  opacity:0;visibility:hidden;transition:opacity .4s var(--ease),visibility .4s;
  overflow-y:auto;
}
.drawer.open{opacity:1;visibility:visible}
.drawer-inner{width:min(100% - 40px,520px);margin:auto;padding:96px 0 56px}
.drawer a{
  display:flex;align-items:baseline;gap:14px;padding:13px 4px;border-bottom:1px solid var(--line);
  font-family:var(--font-display);font-size:1.42rem;font-weight:500;letter-spacing:-.02em;
  opacity:0;transform:translateY(14px);
}
.drawer.open a{animation:drawerIn .6s var(--ease) forwards;animation-delay:calc(var(--i)*38ms + 90ms)}
.drawer a i{font-style:normal;font-family:var(--font-mono);font-size:.66rem;color:var(--accent);letter-spacing:.1em}
@keyframes drawerIn{to{opacity:1;transform:none}}
.drawer-close{position:absolute;top:16px;right:max(20px,var(--gut))}

/* ============================================================
   Buttons
   ============================================================ */
.btn{
  --bh:0;
  display:inline-flex;align-items:center;justify-content:center;gap:.6em;
  padding:.82em 1.4em;border-radius:100px;border:1px solid transparent;
  font-family:var(--font-display);font-size:.87rem;font-weight:600;letter-spacing:-.005em;
  cursor:pointer;position:relative;overflow:hidden;isolation:isolate;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease),background .35s var(--ease),color .35s var(--ease);
}
.btn svg{width:15px;height:15px;transition:transform .4s var(--ease)}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;box-shadow:0 8px 26px -10px var(--glow)}
.btn-primary:hover{box-shadow:0 14px 38px -10px var(--glow)}
.btn-primary::before{
  content:"";position:absolute;inset:0;z-index:-1;opacity:0;
  background:linear-gradient(135deg,var(--accent-2),var(--accent));
  transition:opacity .45s var(--ease);
}
.btn-primary:hover::before{opacity:1}
.btn-ghost{background:var(--surface);border-color:var(--line);color:var(--fg)}
.btn-ghost:hover{background:var(--surface-2);border-color:var(--line-2)}
.btn-line{background:transparent;border-color:var(--line-2);color:var(--fg)}
.btn-line:hover{background:var(--surface)}
.btn:hover svg.arr{transform:translateX(3px)}
.btn-sm{padding:.6em 1.05em;font-size:.79rem}

/* text link with animated underline */
.tlink{
  display:inline-flex;align-items:center;gap:.45em;
  font-family:var(--font-display);font-weight:600;font-size:.87rem;color:var(--accent);
  position:relative;
}
.tlink::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:1.5px;background:currentColor;
  transform:scaleX(0);transform-origin:right;transition:transform .45s var(--ease);
}
.tlink:hover::after{transform:scaleX(1);transform-origin:left}
.tlink svg{width:13px;height:13px;transition:transform .4s var(--ease)}
.tlink:hover svg{transform:translateX(3px)}

/* ============================================================
   Cards + surfaces
   ============================================================ */
.card{
  position:relative;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r);
  overflow:hidden;transition:transform .5s var(--ease),border-color .5s var(--ease),box-shadow .5s var(--ease);
}
html[data-theme="dark"] .card,:root:not([data-theme]) .card{background:linear-gradient(180deg,rgba(255,255,255,.045),rgba(255,255,255,.012))}
.card:hover{transform:translateY(-4px);border-color:var(--line-2);box-shadow:var(--shadow)}
.card-pad{padding:clamp(18px,2.1vw,26px)}

/* spotlight follows pointer */
.spot{position:relative}
.spot::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:0;
  transition:opacity .45s var(--ease);
  background:radial-gradient(360px circle at var(--mx,50%) var(--my,50%),color-mix(in oklab,var(--accent) 16%,transparent),transparent 62%);
}
.spot:hover::before{opacity:1}

.tag{
  display:inline-flex;align-items:center;gap:.4em;
  padding:.3em .68em;border-radius:100px;border:1px solid var(--line);
  background:var(--surface);font-size:.7rem;font-weight:600;letter-spacing:.04em;
  color:var(--fg-2);font-family:var(--font-display);white-space:nowrap;
}
.tag-accent{color:var(--accent);border-color:color-mix(in oklab,var(--accent) 34%,transparent);background:color-mix(in oklab,var(--accent) 11%,transparent)}
.tag-warn{color:var(--warn);border-color:color-mix(in oklab,var(--warn) 34%,transparent);background:color-mix(in oklab,var(--warn) 11%,transparent)}

/* ============================================================
   Reveal on scroll
   ============================================================ */
[data-rv]{opacity:0;will-change:opacity,transform}
[data-rv="up"]{transform:translate3d(0,26px,0)}
[data-rv="fade"]{transform:none}
[data-rv="left"]{transform:translate3d(-26px,0,0)}
[data-rv="right"]{transform:translate3d(26px,0,0)}
[data-rv="zoom"]{transform:scale(.965)}
[data-rv].in{
  opacity:1;transform:none;
  transition:opacity .85s var(--ease),transform .95s var(--ease);
  transition-delay:var(--d,0ms);
}
.stagger > *{opacity:0;transform:translate3d(0,22px,0)}
.stagger.in > *{opacity:1;transform:none;transition:opacity .8s var(--ease),transform .9s var(--ease)}
.stagger.in > *:nth-child(1){transition-delay:.02s}
.stagger.in > *:nth-child(2){transition-delay:.08s}
.stagger.in > *:nth-child(3){transition-delay:.14s}
.stagger.in > *:nth-child(4){transition-delay:.2s}
.stagger.in > *:nth-child(5){transition-delay:.26s}
.stagger.in > *:nth-child(6){transition-delay:.32s}
.stagger.in > *:nth-child(7){transition-delay:.38s}
.stagger.in > *:nth-child(8){transition-delay:.44s}
.stagger.in > *:nth-child(n+9){transition-delay:.5s}

/* line-by-line headline reveal */
.split{display:block;overflow:hidden}
.split > span{display:block;transform:translateY(105%);transition:transform 1.05s var(--ease);transition-delay:var(--d,0ms)}
.split.in > span{transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  [data-rv],.stagger > *{opacity:1 !important;transform:none !important}
  .split > span{transform:none !important}
}

/* ============================================================
   Hero
   ============================================================ */
.hero{
  position:relative;min-height:min(100svh,940px);display:flex;align-items:center;
  padding-top:calc(var(--nav-h) + 40px);padding-bottom:clamp(56px,7vw,96px);
  overflow:hidden;isolation:isolate;
}
#field{position:absolute;inset:0;z-index:-2;width:100%;height:100%}
.hero::after{
  content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(120% 70% at 12% 8%, color-mix(in oklab,var(--accent) 15%,transparent), transparent 58%),
    radial-gradient(90% 60% at 88% 100%, color-mix(in oklab,var(--accent-2) 12%,transparent), transparent 60%),
    linear-gradient(180deg,transparent 55%, var(--bg) 100%);
}
.hero-grid{display:grid;gap:clamp(34px,5vw,72px);grid-template-columns:1fr;align-items:center}
@media(min-width:1000px){.hero-grid{grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr)}}

.hero h1{letter-spacing:-.04em}
.hero h1 .thin{font-weight:400;color:var(--fg-2)}
.hero h1 em{
  font-family:var(--font-serif);font-style:italic;font-weight:400;letter-spacing:-.01em;
  background:linear-gradient(100deg,var(--accent),var(--accent-2) 55%,var(--accent-3));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  padding-right:.06em;
}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}

.hero-card{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow-lg);
  background:var(--bg-2);
}
.hero-card img{width:100%;aspect-ratio:4/5;object-fit:cover;filter:var(--photo-filter)}
.hero-card figcaption{
  position:absolute;inset:auto 0 0;padding:26px 22px 20px;
  background:var(--scrim);
}
.hero-card figcaption b{display:block;font-family:var(--font-display);font-size:1.02rem;letter-spacing:-.02em}
.hero-card figcaption span{font-size:.78rem;color:var(--fg-2)}

/* scroll cue */
.cue{
  position:absolute;left:50%;bottom:24px;transform:translateX(-50%);
  display:flex;flex-direction:column;align-items:center;gap:8px;z-index:2;
  font-family:var(--font-display);font-size:.62rem;letter-spacing:.22em;text-transform:uppercase;color:var(--fg-3);
}
.cue i{width:1px;height:38px;background:linear-gradient(180deg,var(--accent),transparent);animation:cue 2.4s var(--ease-io) infinite}
@keyframes cue{0%{transform:scaleY(0);transform-origin:top}45%{transform:scaleY(1);transform-origin:top}55%{transform:scaleY(1);transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* ============================================================
   Stat counters
   ============================================================ */
.stats{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.stat{background:var(--bg-2);padding:clamp(18px,2.3vw,30px);position:relative;overflow:hidden}
.stat b{
  display:block;font-family:var(--font-display);font-weight:600;
  font-size:clamp(1.85rem,4vw,2.9rem);line-height:1;letter-spacing:-.045em;
  background:linear-gradient(160deg,var(--fg),color-mix(in oklab,var(--accent) 62%,var(--fg)));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  font-variant-numeric:tabular-nums;
}
.stat span{display:block;margin-top:.5em;font-size:.72rem;letter-spacing:.13em;text-transform:uppercase;color:var(--fg-3);font-weight:600}
.stat::after{content:"";position:absolute;left:0;top:0;width:100%;height:2px;background:linear-gradient(90deg,var(--accent),transparent);transform:scaleX(0);transform-origin:left;transition:transform .8s var(--ease)}
.stat.in::after{transform:scaleX(1)}

/* ============================================================
   People
   ============================================================ */
.person{display:flex;flex-direction:column}
.person-ph{
  position:relative;aspect-ratio:1/1.12;overflow:hidden;border-radius:var(--r);
  background:var(--bg-3);border:1px solid var(--line);
}
.person-ph img{width:100%;height:100%;object-fit:cover;filter:var(--photo-filter);transition:transform 1.1s var(--ease),filter .6s var(--ease)}
.person:hover .person-ph img{transform:scale(1.055)}
.person-ph::after{
  content:"";position:absolute;inset:0;opacity:0;transition:opacity .5s var(--ease);
  background:linear-gradient(180deg,transparent 40%,color-mix(in oklab,var(--accent) 30%,transparent));
  mix-blend-mode:overlay;
}
.person:hover .person-ph::after{opacity:1}
.person-body{padding-top:14px}
.person-body h4{font-size:.98rem;line-height:1.25}
.person-role{font-size:.79rem;color:var(--accent);font-weight:600;margin-top:3px}
.person-meta{font-size:.79rem;color:var(--fg-3);line-height:1.5;margin-top:5px}
.person-meta em{font-style:normal;color:var(--fg-2)}
.socials{display:flex;gap:6px;margin-top:11px;flex-wrap:wrap}
.socials a{
  width:28px;height:28px;display:grid;place-items:center;border-radius:8px;
  border:1px solid var(--line);background:var(--surface);color:var(--fg-3);
  transition:.3s var(--ease);
}
.socials a:hover{color:var(--accent);border-color:color-mix(in oklab,var(--accent) 45%,transparent);background:color-mix(in oklab,var(--accent) 12%,transparent);transform:translateY(-2px)}
.socials svg{width:13px;height:13px}

/* group heading */
.group-head{display:flex;align-items:baseline;gap:14px;margin:clamp(38px,5vw,64px) 0 26px}
.group-head:first-child{margin-top:0}
.group-head h3{white-space:nowrap}
.group-head i{flex:1;height:1px;background:var(--line);font-style:normal}
.group-head b{font-family:var(--font-mono);font-size:.72rem;color:var(--fg-3);font-weight:500}

/* ============================================================
   Publications
   ============================================================ */
.filters{
  display:flex;flex-wrap:wrap;gap:10px;align-items:center;
  position:sticky;top:var(--nav-h);z-index:40;padding:14px 0;
  background:color-mix(in oklab,var(--bg) 88%,transparent);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);margin-bottom:26px;
}
.search{
  position:relative;flex:1 1 240px;min-width:200px;max-width:420px;
}
.search input{
  width:100%;padding:.68em 1em .68em 2.5em;border-radius:100px;
  background:var(--surface);border:1px solid var(--line);color:var(--fg);
  font:inherit;font-size:.87rem;outline:none;transition:.3s var(--ease);
}
.search input::placeholder{color:var(--fg-3)}
.search input:focus{border-color:color-mix(in oklab,var(--accent) 55%,transparent);background:var(--surface-2);box-shadow:0 0 0 4px color-mix(in oklab,var(--accent) 13%,transparent)}
.search svg{position:absolute;left:.95em;top:50%;transform:translateY(-50%);width:15px;height:15px;color:var(--fg-3);pointer-events:none}
.chips{display:flex;flex-wrap:wrap;gap:7px}
.chip{
  padding:.46em .95em;border-radius:100px;border:1px solid var(--line);background:var(--surface);
  font-family:var(--font-display);font-size:.78rem;font-weight:600;color:var(--fg-2);cursor:pointer;
  transition:.3s var(--ease);white-space:nowrap;
}
.chip:hover{border-color:var(--line-2);color:var(--fg)}
.chip[aria-pressed="true"]{background:linear-gradient(135deg,var(--accent),var(--accent-2));border-color:transparent;color:#fff;box-shadow:0 6px 18px -8px var(--glow)}

.pub{
  display:grid;grid-template-columns:auto 1fr;gap:16px;
  padding:18px 2px;border-bottom:1px solid var(--line);
  transition:background .35s var(--ease);
}
.pub:hover{background:var(--surface)}
.pub-n{
  font-family:var(--font-mono);font-size:.72rem;color:var(--fg-3);
  padding-top:.35em;min-width:2.6em;font-variant-numeric:tabular-nums;
}
.pub h4{font-size:.99rem;line-height:1.38;font-weight:600;letter-spacing:-.012em;text-wrap:pretty}
.pub h4 a:hover{color:var(--accent)}
.pub-src{font-size:.82rem;color:var(--fg-3);margin-top:6px;line-height:1.5}
.pub-src b{color:var(--fg-2);font-weight:600}
.pub-foot{display:flex;flex-wrap:wrap;gap:7px;margin-top:9px;align-items:center}

.book{display:flex;flex-direction:column;height:100%}
.book-cover{
  aspect-ratio:3/4;border-radius:var(--r-sm);overflow:hidden;background:var(--bg-3);
  border:1px solid var(--line);box-shadow:var(--shadow);
}
.book-cover img{width:100%;height:100%;object-fit:cover;transition:transform 1s var(--ease)}
.book:hover .book-cover img{transform:scale(1.05)}
.book h4{font-size:.9rem;line-height:1.35;margin-top:13px}
.book .meta{font-size:.76rem;color:var(--fg-3);margin-top:5px;line-height:1.5}

.patent{padding:18px 2px;border-bottom:1px solid var(--line);transition:background .35s var(--ease)}
.patent:hover{background:var(--surface)}

/* ============================================================
   Gallery
   ============================================================ */
.masonry{columns:4;column-gap:14px}
@media(max-width:1100px){.masonry{columns:3}}
@media(max-width:760px){.masonry{columns:2}}
@media(max-width:460px){.masonry{columns:1}}
.mitem{
  break-inside:avoid;margin-bottom:14px;border-radius:var(--r-sm);overflow:hidden;
  border:1px solid var(--line);background:var(--bg-3);cursor:zoom-in;position:relative;
  transition:transform .55s var(--ease),box-shadow .55s var(--ease),border-color .4s;
  opacity:0;transform:translateY(18px);
}
.mitem.in{opacity:1;transform:none;transition:opacity .7s var(--ease) var(--d,0ms),transform .8s var(--ease) var(--d,0ms)}
.mitem:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-2);z-index:2}
.mitem img{width:100%;display:block;filter:var(--photo-filter);transition:transform 1.1s var(--ease)}
.mitem:hover img{transform:scale(1.045)}
.mitem::after{
  content:"";position:absolute;inset:0;opacity:0;transition:opacity .45s var(--ease);
  background:linear-gradient(180deg,transparent 55%,rgba(5,7,11,.55));
}
.mitem:hover::after{opacity:1}

.lightbox{
  position:fixed;inset:0;z-index:200;display:grid;place-items:center;padding:clamp(14px,4vw,54px);
  background:rgba(4,6,10,.93);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  opacity:0;visibility:hidden;transition:opacity .4s var(--ease),visibility .4s;
}
.lightbox.open{opacity:1;visibility:visible}
.lightbox img{max-width:100%;max-height:82vh;border-radius:var(--r-sm);box-shadow:0 40px 120px -30px #000;transform:scale(.96);transition:transform .5s var(--ease)}
.lightbox.open img{transform:none}
.lb-bar{position:absolute;inset:auto 0 0;display:flex;justify-content:center;align-items:center;gap:12px;padding:20px;color:#e8ecf5}
.lb-count{font-family:var(--font-mono);font-size:.78rem;color:#9aa4bb;min-width:5em;text-align:center}
.lb-nav{position:absolute;top:50%;transform:translateY(-50%);width:46px;height:46px;border-radius:50%;
  background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.16);color:#fff;display:grid;place-items:center;cursor:pointer;transition:.3s var(--ease)}
.lb-nav:hover{background:rgba(255,255,255,.18);transform:translateY(-50%) scale(1.06)}
.lb-prev{left:clamp(8px,2vw,26px)}.lb-next{right:clamp(8px,2vw,26px)}
.lb-close{position:absolute;top:clamp(12px,2vw,26px);right:clamp(12px,2vw,26px)}

/* ============================================================
   News / posts
   ============================================================ */
.post{display:flex;flex-direction:column;height:100%}
.post-img{aspect-ratio:16/10;overflow:hidden;background:var(--bg-3)}
.post-img img{width:100%;height:100%;object-fit:cover;filter:var(--photo-filter);transition:transform 1.1s var(--ease)}
.card:hover .post-img img{transform:scale(1.055)}
.post-body{padding:20px;display:flex;flex-direction:column;gap:9px;flex:1}
.post-date{font-family:var(--font-mono);font-size:.71rem;color:var(--fg-3);letter-spacing:.03em}
.post h3{font-size:1.04rem;line-height:1.3}
.post p{font-size:.85rem;color:var(--fg-3);line-height:1.55;display:-webkit-box;-webkit-line-clamp:3;line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.post .tlink{margin-top:auto;padding-top:6px}

.clip{display:grid;grid-template-columns:auto 1fr;gap:18px;align-items:start}
.clip-img{width:clamp(96px,13vw,168px);border-radius:var(--r-sm);overflow:hidden;border:1px solid var(--line);background:var(--bg-3)}
.clip-img img{width:100%;filter:var(--photo-filter)}
@media(max-width:560px){.clip{grid-template-columns:1fr}.clip-img{width:100%;max-width:280px}}

/* logo strip */
.logos{display:flex;flex-wrap:wrap;gap:clamp(20px,3.4vw,54px);align-items:center;justify-content:center}
.logos img{
  height:clamp(26px,3.2vw,42px);width:auto;object-fit:contain;
  opacity:.55;filter:grayscale(1);transition:.45s var(--ease);
}
html[data-theme="dark"] .logos img,:root:not([data-theme]) .logos img{filter:grayscale(1) invert(1) brightness(1.7)}
.logos img:hover{opacity:1;filter:none;transform:scale(1.05)}
.marquee{overflow:hidden;mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);-webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.marquee-track{display:flex;gap:clamp(28px,4vw,64px);width:max-content;animation:marq 46s linear infinite;align-items:center}
.marquee:hover .marquee-track{animation-play-state:paused}
@keyframes marq{to{transform:translateX(-50%)}}

/* ============================================================
   Timeline / lists
   ============================================================ */
.tl{position:relative;padding-left:26px}
.tl::before{content:"";position:absolute;left:5px;top:6px;bottom:6px;width:1px;background:linear-gradient(180deg,var(--accent),var(--line) 30%,var(--line))}
.tl li{position:relative;list-style:none;padding:0 0 20px}
.tl li::before{
  content:"";position:absolute;left:-25px;top:.55em;width:11px;height:11px;border-radius:50%;
  background:var(--bg);border:2px solid var(--accent);transition:.4s var(--ease);
}
.tl li:hover::before{box-shadow:0 0 0 5px color-mix(in oklab,var(--accent) 18%,transparent)}
.tl b{display:block;font-family:var(--font-display);font-size:.95rem;font-weight:600;letter-spacing:-.012em}
.tl span{font-size:.84rem;color:var(--fg-3)}
.tl .yr{font-family:var(--font-mono);font-size:.72rem;color:var(--accent);letter-spacing:.04em}

.dl{display:grid;gap:0;margin:0}
.dl > div{display:grid;grid-template-columns:auto 1fr;gap:16px;padding:13px 2px;border-bottom:1px solid var(--line);align-items:baseline}
.dl dt{font-family:var(--font-mono);font-size:.72rem;color:var(--fg-3);letter-spacing:.05em;text-transform:uppercase;white-space:nowrap}
.dl dd{margin:0;font-size:.92rem;color:var(--fg-2)}
@media(max-width:560px){.dl > div{grid-template-columns:1fr;gap:4px}}

.bullets{margin:0;padding:0;list-style:none;display:grid;gap:11px}
.bullets li{position:relative;padding-left:22px;font-size:.9rem;color:var(--fg-2);line-height:1.6}
.bullets li::before{
  content:"";position:absolute;left:0;top:.62em;width:7px;height:7px;border-radius:2px;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));transform:rotate(45deg);
}
.bullets li b{color:var(--fg);font-weight:600}

/* accordion */
.acc{border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--bg-2)}
.acc + .acc{margin-top:10px}
.acc summary{
  cursor:pointer;list-style:none;padding:16px 20px;display:flex;align-items:center;gap:14px;
  font-family:var(--font-display);font-weight:600;font-size:.98rem;letter-spacing:-.015em;
  transition:background .3s var(--ease);
}
.acc summary::-webkit-details-marker{display:none}
.acc summary:hover{background:var(--surface)}
.acc summary .cnt{margin-left:auto;font-family:var(--font-mono);font-size:.72rem;color:var(--fg-3);font-weight:500}
.acc summary .chev{width:15px;height:15px;color:var(--fg-3);transition:transform .4s var(--ease);flex:none}
.acc[open] summary .chev{transform:rotate(90deg)}
.acc .acc-body{padding:2px 20px 20px;animation:accIn .5s var(--ease)}
@keyframes accIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

/* ============================================================
   Feature blocks
   ============================================================ */
.feat{
  position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);
  background:var(--bg-2);display:grid;
}
.feat-media{position:relative;overflow:hidden;background:var(--bg-3);min-height:230px}
.feat-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:var(--photo-filter);transition:transform 1.3s var(--ease)}
.feat:hover .feat-media img{transform:scale(1.06)}
.feat-body{padding:clamp(22px,3vw,40px);display:flex;flex-direction:column;justify-content:center;gap:12px}
@media(min-width:860px){
  .feat{grid-template-columns:1fr 1fr}
  .feat.rev .feat-media{order:2}
}

.num-card{position:relative;padding:clamp(20px,2.4vw,30px);border:1px solid var(--line);border-radius:var(--r);background:var(--bg-2);overflow:hidden}
.num-card .idx{
  position:absolute;right:14px;top:2px;font-family:var(--font-display);font-weight:700;
  font-size:4.2rem;line-height:1;color:var(--fg);opacity:.055;letter-spacing:-.05em;
}
.num-card h3{font-size:1.08rem;margin-bottom:9px}
.num-card p{font-size:.88rem;color:var(--fg-3);line-height:1.6}

/* quote */
.quote{
  font-family:var(--font-serif);font-size:clamp(1.35rem,2.8vw,2.15rem);line-height:1.32;
  letter-spacing:-.015em;color:var(--fg);text-wrap:balance;
}
.quote-mark{font-size:3em;line-height:0;color:var(--accent);opacity:.4;vertical-align:-.32em;margin-right:.05em}

/* ============================================================
   Footer + CTA
   ============================================================ */
.cta{
  position:relative;overflow:hidden;border-radius:var(--r-xl);
  border:1px solid var(--line);background:var(--bg-2);
  padding:clamp(34px,5.5vw,76px);text-align:center;isolation:isolate;
}
.cta::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(70% 100% at 20% 0%,color-mix(in oklab,var(--accent) 22%,transparent),transparent 62%),
    radial-gradient(60% 100% at 85% 100%,color-mix(in oklab,var(--accent-2) 20%,transparent),transparent 60%);
}
.cta h2{margin-bottom:.5em}

.footer{border-top:1px solid var(--line);padding-block:clamp(44px,5.5vw,72px) 30px;background:var(--bg-2)}
.foot-grid{display:grid;gap:34px;grid-template-columns:1fr}
@media(min-width:760px){.foot-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr}}
.foot-col h5{font-family:var(--font-display);font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--fg-3);margin:0 0 14px;font-weight:600}
.foot-col ul{margin:0;padding:0;list-style:none;display:grid;gap:9px}
.foot-col a{font-size:.87rem;color:var(--fg-2);transition:color .3s var(--ease)}
.foot-col a:hover{color:var(--accent)}
.foot-brand svg{height:38px;width:auto;margin-bottom:14px}
.foot-bot{
  margin-top:clamp(32px,4vw,52px);padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  font-size:.78rem;color:var(--fg-3);
}
.foot-social{display:flex;gap:8px}

/* scroll progress */
.progress{position:fixed;inset:0 0 auto;height:2px;z-index:140;background:linear-gradient(90deg,var(--accent),var(--accent-2));transform:scaleX(0);transform-origin:left;will-change:transform}

/* back to top */
.totop{
  position:fixed;right:max(18px,calc(var(--gut) - 18px));bottom:22px;z-index:100;
  width:44px;height:44px;border-radius:50%;display:grid;place-items:center;cursor:pointer;
  background:color-mix(in oklab,var(--bg-2) 88%,transparent);border:1px solid var(--line);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  opacity:0;transform:translateY(12px) scale(.9);pointer-events:none;
  transition:.45s var(--ease);box-shadow:var(--shadow);
}
.totop.show{opacity:1;transform:none;pointer-events:auto}
.totop:hover{border-color:var(--line-2);transform:translateY(-2px)}

/* page header (interior pages) */
.phead{
  position:relative;padding-top:calc(var(--nav-h) + clamp(52px,7vw,96px));
  padding-bottom:clamp(30px,4.4vw,56px);overflow:hidden;isolation:isolate;
}
.phead::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(90% 120% at 8% 0%,color-mix(in oklab,var(--accent) 16%,transparent),transparent 58%),
    radial-gradient(70% 100% at 95% 10%,color-mix(in oklab,var(--accent-2) 11%,transparent),transparent 62%);
}
.phead h1{font-size:clamp(2.3rem,5.4vw,4.2rem)}
.phead .lede{margin-top:1.1rem}
.crumb{display:flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:.72rem;color:var(--fg-3);margin-bottom:18px;letter-spacing:.04em}
.crumb a:hover{color:var(--accent)}

/* misc utilities */
.center{text-align:center}
.flex{display:flex}
.wrapf{flex-wrap:wrap}
.gap-8{gap:8px}.gap-12{gap:12px}.gap-16{gap:16px}
.mt-0{margin-top:0}.mt-8{margin-top:8px}.mt-16{margin-top:16px}.mt-24{margin-top:24px}.mt-32{margin-top:32px}.mt-48{margin-top:48px}
.mb-0{margin-bottom:0}
.hide{display:none !important}
.sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}

/* skip link */
.skip{position:absolute;left:12px;top:-60px;z-index:300;padding:10px 16px;border-radius:8px;background:var(--accent);color:#fff;font-weight:600;font-size:.85rem;transition:top .25s var(--ease)}
.skip:focus{top:12px}

/* empty state */
.empty{padding:56px 20px;text-align:center;color:var(--fg-3);font-size:.9rem}

/* ============================================================================
   REIMAGINE LAYER
   Type moved to IBM Plex; the flat single-tone canvas that made every section
   read the same is replaced with banded rhythm and warmer depth.
   ========================================================================== */

/* ---- warmer, layered dark palette (more separation between planes) ---- */
html[data-theme="dark"], :root:not([data-theme]) {
  --bg:#080a11;
  --bg-2:#0d1019;
  --bg-3:#141827;
  --band:#0b0e17;              /* alternating section band */
  --band-2:#10141f;
  --accent:#5aa2ff;
  --accent-2:#2ad4c4;
  --accent-3:#b39cfb;
  --line:rgba(255,255,255,.085);
  --line-2:rgba(255,255,255,.16);
}
html[data-theme="light"] {
  --band:#f4f6fa;
  --band-2:#eef1f7;
}

/* ---- section rhythm: bands break up the endless single-tone scroll ---- */
main > .section{ position:relative; }
main > .section:nth-of-type(even)::before{
  content:''; position:absolute; inset:0; z-index:-1;
  background:var(--band);
  border-block:1px solid var(--line);
}
main > .section:nth-of-type(4n)::before{ background:var(--band-2); }

/* a hairline accent tick on every section head, so heads read as landmarks */
.section-head > h2{ position:relative; }
main > .section:not(.hero) .section-head:not(.center) > h2::before{
  content:''; position:absolute; left:-18px; top:.18em; bottom:.22em; width:3px;
  border-radius:2px;
  background:linear-gradient(180deg,var(--accent),var(--accent-2));
  opacity:.85;
}
@media (max-width:900px){ main > .section .section-head:not(.center) > h2::before{ display:none } }

/* IBM Plex sets tighter than Space Grotesk did; restore optical spacing */
h1,h2,h3{ letter-spacing:-.021em }
.eyebrow{ letter-spacing:.19em }
.serif{ font-style:italic }

/* ---- Collaborate, relocated into the top bar ---- */
.nav-cta{
  display:inline-flex; align-items:center; gap:.5rem;
  height:38px; padding:0 15px; border-radius:999px;
  font-family:var(--font-display); font-size:.83rem; font-weight:600; letter-spacing:-.005em;
  color:#04121f; text-decoration:none; white-space:nowrap;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  box-shadow:0 1px 0 rgba(255,255,255,.22) inset, 0 6px 20px -8px var(--glow);
  transition:transform .18s var(--ease), box-shadow .18s var(--ease), filter .18s var(--ease);
}
.nav-cta:hover{ transform:translateY(-1px); filter:saturate(1.1) brightness(1.04);
  box-shadow:0 1px 0 rgba(255,255,255,.28) inset, 0 12px 28px -10px var(--glow); }
.nav-cta:active{ transform:translateY(0) }
.nav-cta svg{ width:15px; height:15px }
@media (max-width:1080px){ .nav-cta span{ display:none } .nav-cta{ padding:0; width:38px; justify-content:center } }
@media (max-width:640px){ .nav-cta{ display:none } }

.drawer-cta{
  display:flex !important; align-items:center; gap:.6rem;
  margin-bottom:18px; padding:13px 16px; border-radius:12px;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:#04121f !important; font-family:var(--font-display); font-weight:600; font-size:1rem !important;
  letter-spacing:-.01em; text-decoration:none;
}
.drawer-cta svg{ width:17px; height:17px }

/* ---- footer credit ---- */
.foot-credit{ color:var(--fg-3) }
.foot-credit a{
  color:var(--fg-2); text-decoration:none;
  border-bottom:1px solid var(--line-2); padding-bottom:1px;
  transition:color .18s var(--ease), border-color .18s var(--ease);
}
.foot-credit a:hover{ color:var(--accent); border-color:var(--accent) }
.foot-bot{ flex-wrap:wrap; gap:.5rem 1.4rem }

/* ============================================================================
   DEMO THEME LAYER — chandraslab content in the hemishthanki.com sidebar UI.
   Six contrasting rail/canvas pairings, switchable from the bottom-right picker.
   Layered over the base design system so every existing component keeps working.
   ========================================================================== */

/* ---- palettes. 'forest' is the hemishthanki.com pairing and the default. ---- */
:root,
html[data-dtheme="forest"]{ --rail-bg:#dae3da; --rail-ink:#2c3f33; --canvas:#54795f; --canvas-2:#4a6b54; --canvas-3:#3f5b48; --on-canvas:#dae3da; }
html[data-dtheme="slate"] { --rail-bg:#e4e8ee; --rail-ink:#263038; --canvas:#3a4756; --canvas-2:#323d4a; --canvas-3:#29323d; --on-canvas:#e4e8ee; }
html[data-dtheme="clay"]  { --rail-bg:#f2e7dc; --rail-ink:#5a3325; --canvas:#9a5b43; --canvas-2:#8a503a; --canvas-3:#774531; --on-canvas:#f7efe7; }
html[data-dtheme="ink"]   { --rail-bg:#e8e8e8; --rail-ink:#1a1c20; --canvas:#16181c; --canvas-2:#101216; --canvas-3:#0b0c0f; --on-canvas:#ececec; }
html[data-dtheme="plum"]  { --rail-bg:#eadfee; --rail-ink:#3b2c49; --canvas:#57406b; --canvas-2:#4c385e; --canvas-3:#402f4f; --on-canvas:#eadfee; }
html[data-dtheme="ocean"] { --rail-bg:#dceaec; --rail-ink:#143a42; --canvas:#1f5a66; --canvas-2:#1a4e59; --canvas-3:#16424b; --on-canvas:#dceaec; }

/* ---- map the base design system onto whichever palette is active ---- */
:root, html[data-theme="dark"], html[data-theme="light"], :root:not([data-theme]){
  --font-display:"Oswald", "Helvetica Neue", Arial, sans-serif;
  --font-body:"Inter", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-serif:"Inter", ui-sans-serif, system-ui, sans-serif;

  --bg:var(--canvas); --bg-2:var(--canvas-2); --bg-3:var(--canvas-3);
  --band:var(--canvas-2); --band-2:var(--canvas-3);
  --surface:color-mix(in srgb, var(--on-canvas) 10%, transparent);
  --surface-2:color-mix(in srgb, var(--on-canvas) 16%, transparent);
  --line:color-mix(in srgb, var(--on-canvas) 20%, transparent);
  --line-2:color-mix(in srgb, var(--on-canvas) 34%, transparent);
  --fg:var(--on-canvas);
  --fg-2:color-mix(in srgb, var(--on-canvas) 82%, transparent);
  --fg-3:color-mix(in srgb, var(--on-canvas) 60%, transparent);
  --accent:var(--on-canvas);
  --accent-2:color-mix(in srgb, var(--on-canvas) 78%, var(--canvas));
  --accent-3:var(--on-canvas);
  --glow:color-mix(in srgb, var(--on-canvas) 30%, transparent);
  --grid-line:color-mix(in srgb, var(--on-canvas) 7%, transparent);
  --ring:0 0 0 1px color-mix(in srgb, var(--on-canvas) 16%, transparent);
  --shadow:0 1px 2px rgba(0,0,0,.14), 0 10px 30px -14px rgba(0,0,0,.34);
  --shadow-lg:0 2px 6px rgba(0,0,0,.16), 0 34px 70px -28px rgba(0,0,0,.44);
  --scrim:linear-gradient(180deg,transparent 0%,color-mix(in srgb,var(--canvas) 72%,transparent) 60%,color-mix(in srgb,var(--canvas) 96%,transparent) 100%);
  --rail-w:268px; --r:16px;
  color-scheme:light;
}
html{ color-scheme:light }
body{ background:var(--canvas); color:var(--on-canvas); padding-left:var(--rail-w) }

h1,h2,h3,h4,h5{ font-family:var(--font-display); font-weight:700; letter-spacing:.02em }
h1{ letter-spacing:.04em }
.eyebrow{ font-family:var(--font-display); font-weight:500; letter-spacing:.2em }
.serif{ font-family:var(--font-body); font-style:normal }

/* ---- neutralise the base .drawer reveal that .rail inherits ---- */
.rail{ backdrop-filter:none; -webkit-backdrop-filter:none; overflow:visible; opacity:1; visibility:visible }
.rail a{
  opacity:1; transform:none; border-bottom:0; animation:none !important;
  font-family:var(--font-body); font-size:.855rem; font-weight:500;
  letter-spacing:0; align-items:center; gap:11px; padding:9px 10px;
}
.rail a i{ font-family:inherit; font-size:inherit; color:inherit; letter-spacing:0 }

/* ---- the rail ---- */
.rail{
  position:fixed; inset:0 auto 0 0; width:var(--rail-w); z-index:60;
  display:flex; flex-direction:column;
  background:var(--rail-bg); color:var(--rail-ink);
}
.rail-brand{
  display:flex; align-items:center; gap:11px;
  padding:18px !important; margin:10px 10px 4px; border-radius:12px;
  background:color-mix(in srgb, var(--canvas) 10%, transparent);
  text-decoration:none; color:var(--rail-ink);
}
.rail-brand img{ width:30px; height:auto; flex:none }
.rail-brand b{ display:block; font-family:var(--font-display); font-weight:700; font-size:.94rem; letter-spacing:.02em; line-height:1.15 }
.rail-brand em{ display:block; font-style:normal; font-size:.58rem; letter-spacing:.14em; color:color-mix(in srgb,var(--rail-ink) 62%,transparent); margin-top:2px }

.rail-scroll{ flex:1; overflow-y:auto; padding:10px 10px 16px; scrollbar-width:thin }
.rail-label{
  margin:16px 0 6px; padding-left:10px;
  font-family:var(--font-display); font-weight:500; font-size:.62rem;
  letter-spacing:.2em; text-transform:uppercase;
  color:color-mix(in srgb,var(--rail-ink) 52%,transparent);
}
.rail-group{ display:flex; flex-direction:column; gap:1px }
.rail-item{ border-radius:9px; color:var(--rail-ink); text-decoration:none; line-height:1.3;
  transition:background .16s var(--ease), color .16s var(--ease) }
.rail-item span{ flex:1; min-width:0 }
.rail-ico{ display:grid; place-items:center; width:20px; height:20px; flex:none; opacity:.7 }
.rail-ico svg{ width:20px; height:20px; display:block }
.rail-out{ width:14px; height:14px; opacity:0; flex:none; transition:opacity .16s var(--ease) }
.rail-out svg{ width:14px; height:14px; display:block }
.rail-item:hover{ background:color-mix(in srgb,var(--canvas) 12%,transparent) }
.rail-item:hover .rail-out{ opacity:.5 }
.rail-item.on{ background:var(--canvas); color:var(--on-canvas) }
.rail-item.on .rail-ico{ opacity:1 }
.rail-foot{ padding:10px; border-top:1px solid color-mix(in srgb,var(--rail-ink) 14%,transparent) }

.rail-toggle{
  display:none; position:fixed; top:14px; left:14px; z-index:70;
  width:42px; height:42px; border:0; border-radius:11px; cursor:pointer;
  background:var(--rail-bg); color:var(--rail-ink); place-items:center;
  box-shadow:0 6px 20px -8px rgba(0,0,0,.4);
}
.rail-toggle svg{ width:20px; height:20px }
.rail-scrim{ display:none }
.nav, .progress, .nav-cta, .drawer-cta, .theme-btn{ display:none !important }

/* ---- surfaces ---- */
.card, .cta, .panel, .box{
  background:var(--rail-bg) !important; color:var(--rail-ink) !important;
  border-color:color-mix(in srgb,var(--rail-ink) 14%,transparent) !important; border-radius:var(--r);
}
.card *, .panel *{ color:inherit }
.card a{ color:var(--canvas) }
.card p, .card li, .card span{ color:color-mix(in srgb,var(--rail-ink) 82%,transparent) }
.chip, .tag, .pill{ background:var(--surface) !important; border-color:var(--line) !important; color:var(--fg-2) !important }
.btn-primary{ background:var(--rail-bg); color:var(--canvas); border-color:transparent }
.btn-primary:hover{ filter:brightness(1.06) }
.btn-ghost{ color:var(--on-canvas); border-color:var(--line-2) }
.btn-ghost:hover{ background:var(--surface) }
.footer{ background:var(--canvas-3); border-top:1px solid var(--line) }
.foot-credit a{ color:var(--on-canvas) }
main > .section:nth-of-type(even)::before, main > .section:nth-of-type(4n)::before{ display:none }
.section-head:not(.center) > h2::before{ display:none !important }
.logos img{ filter:none !important; opacity:.9 }

/* the hero portrait is a photo with a scrim caption, not a light panel */
.hero-card{ background:var(--canvas-2); border-color:var(--line) }
.hero-card figcaption{ background:var(--scrim); color:var(--on-canvas) }
.hero-card figcaption b{ color:var(--on-canvas); font-family:var(--font-display); letter-spacing:.01em }
.hero-card figcaption span{ color:var(--fg-2) }

/* ---- theme picker (bottom right) ---- */
.themer{ position:fixed; right:20px; bottom:20px; z-index:120; display:flex; flex-direction:column; align-items:flex-end; gap:10px }
.themer-btn{
  display:inline-flex; align-items:center; gap:8px; cursor:pointer;
  height:44px; padding:0 16px; border:0; border-radius:999px;
  background:var(--rail-bg); color:var(--rail-ink);
  font-family:var(--font-display); font-weight:500; font-size:.82rem; letter-spacing:.06em; text-transform:uppercase;
  box-shadow:0 8px 26px -10px rgba(0,0,0,.55);
  transition:transform .18s var(--ease), box-shadow .18s var(--ease);
}
.themer-btn:hover{ transform:translateY(-1px); box-shadow:0 14px 32px -12px rgba(0,0,0,.6) }
.themer-btn svg{ width:20px; height:20px }
/* display:flex would otherwise beat the UA's [hidden]{display:none} */
.themer-pop[hidden]{ display:none !important }
.themer-pop{
  width:236px; padding:12px; border-radius:16px;
  background:var(--rail-bg); color:var(--rail-ink);
  box-shadow:0 20px 50px -16px rgba(0,0,0,.6);
  display:flex; flex-direction:column; gap:2px;
}
.themer-title{
  margin:2px 0 8px; padding-left:8px;
  font-family:var(--font-display); font-weight:500; font-size:.62rem;
  letter-spacing:.2em; text-transform:uppercase;
  color:color-mix(in srgb,var(--rail-ink) 52%,transparent);
}
.tsw{
  display:flex; align-items:center; gap:10px; width:100%; cursor:pointer;
  padding:8px; border:0; border-radius:10px; background:transparent; color:inherit;
  font-family:var(--font-body); font-size:.85rem; font-weight:500; text-align:left;
  transition:background .15s var(--ease);
}
.tsw:hover{ background:color-mix(in srgb,var(--canvas) 12%,transparent) }
.tsw-chip{
  width:26px; height:26px; border-radius:8px; flex:none;
  background:linear-gradient(135deg, var(--a) 0 50%, var(--b) 50% 100%);
  box-shadow:inset 0 0 0 1px rgba(0,0,0,.14);
}
.tsw-name{ flex:1 }
.tsw-tick{ width:18px; height:18px; opacity:0 }
.tsw-tick svg{ width:18px; height:18px; display:block }
.tsw.on{ background:color-mix(in srgb,var(--canvas) 16%,transparent) }
.tsw.on .tsw-tick{ opacity:.85 }

/* ---- responsive ---- */
@media (max-width:1040px){
  body{ padding-left:0 }
  /* !important: the base .drawer rules fight this at equal specificity */
  .rail{ transform:translateX(-100%) !important; transition:transform .34s var(--ease); box-shadow:0 0 60px rgba(0,0,0,.4) }
  .rail.open{ transform:translateX(0) !important }
  .rail-toggle{ display:grid }
  .rail-scrim{ display:block; position:fixed; inset:0; z-index:55;
    background:rgba(20,26,22,.5); opacity:0; pointer-events:none; transition:opacity .3s var(--ease) }
  .rail.open ~ .rail-scrim{ opacity:1; pointer-events:auto }
  main{ padding-top:56px }
  .themer{ right:14px; bottom:14px }
}
@media (min-width:1041px){
  .rail{ transform:none !important }
}