/* ============================================================
   Khanh Do — personal academic site
   ============================================================ */

:root{
  --bg:        #fbfaf8;
  --bg-alt:    #f2f1ed;
  --surface:   #ffffff;
  --ink:       #16191d;
  --ink-2:     #4a5158;
  --ink-3:     #767d85;
  --line:      #e2e0da;
  --accent:    #0d6e6e;
  --accent-2:  #b45309;
  --accent-soft:#e6f2f1;
  --deep:      #0b2b2e;
  --shadow:    0 1px 2px rgba(16,24,32,.05), 0 8px 24px -12px rgba(16,24,32,.14);
  --shadow-lg: 0 2px 4px rgba(16,24,32,.05), 0 24px 48px -20px rgba(16,24,32,.22);
  --r:  14px;
  --r-sm: 8px;
  --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --serif:'Fraunces',Georgia,'Times New Roman',serif;
  --mono:'JetBrains Mono',ui-monospace,SFMono-Regular,monospace;
  --wrap: 1140px;
}

html[data-theme="dark"]{
  --bg:        #0e1113;
  --bg-alt:    #14181b;
  --surface:   #171c1f;
  --ink:       #eef1f2;
  --ink-2:     #b2bbc0;
  --ink-3:     #838d93;
  --line:      #262d31;
  --accent:    #4cc8c0;
  --accent-2:  #e0a45c;
  --accent-soft:#152b2c;
  --deep:      #081416;
  --shadow:    0 1px 2px rgba(0,0,0,.4), 0 8px 24px -12px rgba(0,0,0,.6);
  --shadow-lg: 0 2px 4px rgba(0,0,0,.4), 0 24px 48px -20px rgba(0,0,0,.7);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:88px;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--sans);font-size:17px;line-height:1.65;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  transition:background .3s ease;
}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;line-height:1.15;letter-spacing:-.015em;margin:0;color:var(--ink)}
p{margin:0 0 1em}
sub{font-size:.72em}
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:28px}
.skip{position:absolute;left:-9999px;top:0;background:var(--accent);color:#fff;padding:10px 16px;z-index:200;border-radius:0 0 8px 0}
.skip:focus{left:0}
:focus-visible{outline:2.5px solid var(--accent);outline-offset:3px;border-radius:4px}

/* ── Buttons ───────────────────────────────────────────── */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--sans);font-size:15px;font-weight:600;
  padding:12px 22px;border-radius:100px;border:1px solid var(--line);
  text-decoration:none;cursor:pointer;background:transparent;color:var(--ink);
  transition:transform .18s cubic-bezier(.2,.8,.3,1),box-shadow .18s,background .18s,border-color .18s,color .18s;
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--accent);border-color:var(--accent);color:#fff;box-shadow:0 6px 18px -8px var(--accent)}
.btn-primary:hover{box-shadow:0 12px 26px -10px var(--accent)}
.btn-ghost{background:var(--surface);box-shadow:var(--shadow)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn-light{background:#fff;color:var(--deep);border-color:#fff;margin-top:26px}
.btn-sm{padding:8px 17px;font-size:14px}


/* EPA AQI category ramp — good → hazardous */
:root{--aqi:linear-gradient(90deg,#00b050 0%,#00b050 12%,#e8c000 12%,#e8c000 30%,#f07d02 30%,#f07d02 48%,#e03131 48%,#e03131 66%,#8f3f97 66%,#8f3f97 84%,#7e0023 84%);}
.nav::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--aqi);z-index:1}
.contact::after{content:'';position:absolute;bottom:0;left:0;right:0;height:3px;background:var(--aqi);z-index:2}
.sec-head .kicker::after{
  content:'';display:inline-block;width:52px;height:2px;margin-left:12px;
  vertical-align:middle;background:var(--aqi);border-radius:2px;opacity:.9;
}

/* ── Nav ───────────────────────────────────────────────── */
.nav{
  position:sticky;top:0;z-index:100;
  background:color-mix(in srgb,var(--bg) 82%,transparent);
  backdrop-filter:saturate(180%) blur(14px);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid transparent;transition:border-color .3s,box-shadow .3s;
}
.nav.scrolled{border-bottom-color:var(--line);box-shadow:0 1px 20px -8px rgba(0,0,0,.12)}
.nav-inner{display:flex;align-items:center;gap:20px;height:70px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;font-weight:700;flex-shrink:0;color:var(--ink)}
.brand-mark{
  width:36px;height:36px;border-radius:10px;background:var(--accent);color:#fff;
  display:grid;place-items:center;font-family:var(--serif);font-size:15px;letter-spacing:.02em;
}
.brand-name{display:flex;flex-direction:column;line-height:1.1;font-size:15.5px}
.brand-name em{font-style:normal;font-size:11px;font-weight:500;color:var(--ink-3);letter-spacing:.08em;text-transform:uppercase}
.nav-links{display:flex;gap:4px;margin-left:auto}
.nav-links a{
  text-decoration:none;font-size:14.5px;font-weight:500;color:var(--ink-2);
  padding:8px 13px;border-radius:8px;transition:color .18s,background .18s;
}
.nav-links a:hover{color:var(--ink);background:var(--bg-alt)}
.nav-links a.active{color:var(--accent);background:var(--accent-soft)}
.nav-actions{display:flex;align-items:center;gap:10px}
.theme-toggle{
  width:38px;height:38px;border-radius:10px;border:1px solid var(--line);
  background:var(--surface);color:var(--ink-2);display:grid;place-items:center;cursor:pointer;
  transition:color .18s,border-color .18s,transform .18s;
}
.theme-toggle:hover{color:var(--accent);border-color:var(--accent);transform:rotate(-12deg)}
.theme-toggle svg{grid-area:1/1;transition:opacity .25s,transform .25s}
.i-moon{opacity:0;transform:scale(.5) rotate(-40deg)}
html[data-theme="dark"] .i-sun{opacity:0;transform:scale(.5) rotate(40deg)}
html[data-theme="dark"] .i-moon{opacity:1;transform:none}
.burger{display:none;width:38px;height:38px;border:1px solid var(--line);background:var(--surface);border-radius:10px;cursor:pointer;padding:0;flex-direction:column;justify-content:center;align-items:center;gap:4px}
.burger span{display:block;width:16px;height:1.8px;background:var(--ink);border-radius:2px;transition:transform .25s,opacity .25s}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(5.8px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-5.8px) rotate(-45deg)}

/* ── Hero ──────────────────────────────────────────────── */
.hero{position:relative;overflow:hidden;padding:clamp(56px,8vw,96px) 0 clamp(48px,6vw,72px)}
.hero-bg{position:absolute;inset:0;z-index:0;pointer-events:none;overflow:hidden}

/* atmospheric column: clean air at the horizon fading to haze aloft */
.sky{
  position:absolute;inset:0;
  background:linear-gradient(180deg,
    #d9edf2 0%, #e8f2f0 20%, #f4f4ec 42%, #fcf4e8 64%, var(--bg) 100%);
  opacity:.62;
}
html[data-theme="dark"] .sky{
  background:linear-gradient(180deg,#08202b 0%,#0a2029 26%,#101a20 54%,#121618 76%,var(--bg) 100%);
  opacity:1;
}

/* isopleths — concentration contours, as on a modeled pollutant field */
.contours{
  position:absolute;inset:0;width:100%;height:100%;
  color:var(--accent);opacity:.3;
  -webkit-mask-image:radial-gradient(ellipse 92% 78% at 50% 46%,#000 38%,transparent 82%);
  mask-image:radial-gradient(ellipse 92% 78% at 50% 46%,#000 38%,transparent 82%);
}
.contours path{fill:none;stroke:currentColor;stroke-width:1.15;vector-effect:non-scaling-stroke}
.contours path:nth-child(odd){opacity:.55}
html[data-theme="dark"] .contours{opacity:.34}

/* haze cells — plume-like, slowly advecting */
.haze{position:absolute;border-radius:50%;filter:blur(78px);opacity:.34;animation:advect 30s ease-in-out infinite}
.h1{width:46vw;height:46vw;max-width:640px;max-height:640px;top:-18%;right:-8%;
    background:radial-gradient(circle,#79cfc8,transparent 68%)}
.h2{width:40vw;height:40vw;max-width:540px;max-height:540px;top:20%;left:-13%;
    background:radial-gradient(circle,#f2c684,transparent 68%);animation-delay:-10s}
.h3{width:32vw;height:32vw;max-width:430px;max-height:430px;bottom:-16%;right:20%;
    background:radial-gradient(circle,#d98d76,transparent 70%);animation-delay:-19s}
html[data-theme="dark"] .haze{opacity:.2}
@keyframes advect{
  0%,100%{transform:translate(0,0) scale(1)}
  33%{transform:translate(5%,-5%) scale(1.1)}
  66%{transform:translate(-4%,4%) scale(.94)}
}

/* particulate field */
.particles{position:absolute;inset:0}
.particles i{
  position:absolute;display:block;border-radius:50%;
  background:var(--ink-2);opacity:0;
  animation:drift linear infinite;
}
html[data-theme="dark"] .particles i{background:#cfe3e2}
@keyframes drift{
  0%{transform:translate3d(0,14px,0);opacity:0}
  14%{opacity:.34}
  86%{opacity:.28}
  100%{transform:translate3d(28px,-150px,0);opacity:0}
}

.hero-inner{position:relative;z-index:1;max-width:920px}
.eyeblow{
  font-family:var(--mono);font-size:12.5px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--accent);margin:0 0 20px;display:inline-flex;align-items:center;gap:9px;
  background:var(--accent-soft);border:1px solid color-mix(in srgb,var(--accent) 22%,transparent);
  padding:7px 15px;border-radius:100px;
}
.hero h1{font-size:clamp(58px,10.5vw,116px);letter-spacing:-.04em;font-weight:700;margin:0 0 14px;line-height:.95}
.hero-role{
  font-family:var(--serif);font-size:clamp(21px,3.1vw,31px);line-height:1.35;
  font-weight:500;color:var(--ink);max-width:20ch;margin:0 0 22px;letter-spacing:-.015em;
}
.hero-role em{font-style:italic;color:var(--accent);position:relative;white-space:nowrap}
.hero-sub{font-size:17.5px;color:var(--ink-2);max-width:66ch;margin:0 0 34px}
.hero-sub strong{color:var(--ink);font-weight:600}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:56px}

.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:2px;margin:0 0 34px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
}
.stats > div{background:var(--bg);padding:22px 20px;transition:background .25s}
.stats > div:hover{background:var(--surface)}
.stats dt{
  font-family:var(--serif);font-size:clamp(32px,4.6vw,46px);font-weight:700;
  color:var(--accent);line-height:1;letter-spacing:-.03em;margin-bottom:8px;font-variant-numeric:tabular-nums;
}
.stats dd{margin:0;font-size:12.5px;line-height:1.4;color:var(--ink-3);text-transform:uppercase;letter-spacing:.07em;font-weight:500}

.funders{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;
  list-style:none;padding:0;margin:0;font-size:13px;
  font-weight:600;color:var(--ink-2);letter-spacing:.05em;
}
.funders li:first-child{
  font-family:var(--mono);font-weight:500;text-transform:uppercase;font-size:11.5px;
  color:var(--ink-3);letter-spacing:.12em;
}
.funders li:not(:first-child){
  border:1px solid var(--line);border-radius:6px;background:var(--surface);
  font-size:12.5px;transition:border-color .2s,color .2s,transform .2s,box-shadow .2s;
}
.funders li:not(:first-child) a{
  display:block;padding:5px 12px;text-decoration:none;color:inherit;
}
.funders li:not(:first-child):hover{
  border-color:var(--accent);color:var(--accent);
  transform:translateY(-2px);box-shadow:0 6px 14px -8px var(--accent);
}

/* ── Sections ──────────────────────────────────────────── */
.section{padding:clamp(64px,9vw,112px) 0;position:relative}
.section.alt{background:var(--bg-alt);border-block:1px solid var(--line)}
.sec-head{max-width:64ch;margin-bottom:52px}
.kicker{
  display:block;font-family:var(--mono);font-size:12px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--accent);margin-bottom:14px;font-weight:500;
}
.kicker.light{color:#7fd6cf}
.sec-head h2{font-size:clamp(29px,4.4vw,44px);letter-spacing:-.028em}
.sec-sub{margin-top:16px;color:var(--ink-2);font-size:16.5px}

/* ── About ─────────────────────────────────────────────── */
.about-grid{display:grid;grid-template-columns:1.25fr .95fr;gap:56px;align-items:start}
.about-text .lead{font-family:var(--serif);font-size:23px;line-height:1.45;color:var(--ink);margin-bottom:20px;letter-spacing:-.012em}
.about-text p{color:var(--ink-2)}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:28px}
.chips span{
  font-size:13px;font-weight:500;padding:6px 13px;border-radius:100px;
  background:var(--accent-soft);color:var(--accent);
  border:1px solid color-mix(in srgb,var(--accent) 18%,transparent);
}
.about-side{display:grid;gap:20px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:28px;box-shadow:var(--shadow)}
.card-title{font-size:13px;font-family:var(--mono);font-weight:500;text-transform:uppercase;letter-spacing:.12em;color:var(--ink-3);margin-bottom:22px}

.timeline{list-style:none;margin:0;padding:0;display:grid;gap:26px}
.timeline li{display:grid;grid-template-columns:40px 1fr;gap:26px;position:relative}
.timeline li:not(:last-child)::before{
  content:'';position:absolute;left:52px;top:24px;bottom:-26px;width:1.5px;
  background:linear-gradient(var(--line),transparent);
}
.timeline li::after{
  content:'';position:absolute;left:48px;top:7px;width:9px;height:9px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 0 3.5px var(--accent-soft);
}
.t-year{font-family:var(--mono);font-size:12.5px;color:var(--ink-3);padding-top:2px;line-height:1.35}
.timeline strong{display:block;color:var(--ink);font-size:16px;line-height:1.35;margin-bottom:3px}
.t-org{display:block;font-size:14.5px;color:var(--accent);font-weight:500}
.t-note{display:block;font-size:13.5px;color:var(--ink-3);line-height:1.5;margin-top:7px}

.awards{list-style:none;margin:0;padding:0;display:grid;gap:15px}
.awards li{padding-left:16px;border-left:2px solid var(--accent-2);line-height:1.4}
.awards strong{display:block;font-size:15px;color:var(--ink)}
.awards span{font-size:13px;color:var(--ink-3);font-family:var(--mono)}

/* ── Research cards ────────────────────────────────────── */
.rcards{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.rcards > .rcard:last-child:nth-child(odd){grid-column:1/-1}
.rcards > .rcard:last-child:nth-child(odd) ul{grid-template-columns:repeat(3,1fr);gap:12px 26px}
.rcard{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:32px;box-shadow:var(--shadow);position:relative;overflow:hidden;
  transition:transform .3s cubic-bezier(.2,.8,.3,1),box-shadow .3s,border-color .3s;
}
.rcard::before{
  content:'';position:absolute;inset:0 0 auto 0;height:3px;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
  transform:scaleX(0);transform-origin:left;transition:transform .45s cubic-bezier(.2,.8,.3,1);
}
.rcard:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:color-mix(in srgb,var(--accent) 32%,var(--line))}
.rcard:hover::before{transform:scaleX(1)}
.rcard-top{display:flex;justify-content:space-between;align-items:flex-start;gap:14px;margin-bottom:16px}
.rnum{font-family:var(--mono);font-size:12px;color:var(--ink-3);letter-spacing:.1em}
.rtags{display:flex;flex-wrap:wrap;gap:6px;justify-content:flex-end}
.tag{
  font-size:11px;font-weight:600;letter-spacing:.04em;padding:4px 9px;border-radius:5px;
  background:var(--bg-alt);color:var(--ink-2);border:1px solid var(--line);white-space:nowrap;
}
.rcard h3{font-size:23px;margin-bottom:10px;letter-spacing:-.02em}
.rcard > p{color:var(--ink-2);font-size:15.5px;font-style:italic;margin-bottom:18px}
.rcard ul{margin:0 0 18px;padding:0;list-style:none;display:grid;gap:12px}
.rcard ul li{position:relative;padding-left:22px;font-size:15px;color:var(--ink-2);line-height:1.6}
.rcard ul li::before{
  content:'';position:absolute;left:0;top:9px;width:9px;height:9px;
  border:2px solid var(--accent);border-radius:2px;transform:rotate(45deg);
}
.rcard ul strong{color:var(--ink);font-weight:600}
.rcard-foot{
  margin:0;padding-top:16px;border-top:1px solid var(--line);
  font-size:13px;color:var(--ink-3);font-family:var(--mono);line-height:1.5;
}

.toolbelt{margin-top:22px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:32px;box-shadow:var(--shadow)}
.toolbelt > h3{font-size:13px;font-family:var(--mono);font-weight:500;text-transform:uppercase;letter-spacing:.12em;color:var(--ink-3);margin-bottom:24px}
.tool-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:26px}
.tool-grid h4{font-size:15px;margin-bottom:7px;color:var(--accent)}
.tool-grid p{font-size:14px;color:var(--ink-2);margin:0;line-height:1.65}

/* ── Publications ──────────────────────────────────────── */
.filters{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:36px}
.chip-btn{
  font-family:var(--sans);font-size:14px;font-weight:500;color:var(--ink-2);
  background:var(--surface);border:1px solid var(--line);border-radius:100px;
  padding:9px 17px;cursor:pointer;display:inline-flex;align-items:center;gap:8px;
  transition:all .18s;
}
.chip-btn span{
  font-family:var(--mono);font-size:11px;background:var(--bg-alt);color:var(--ink-3);
  padding:2px 7px;border-radius:100px;transition:all .18s;
}
.chip-btn:hover{border-color:var(--accent);color:var(--accent)}
.chip-btn.is-active{background:var(--accent);border-color:var(--accent);color:#fff}
.chip-btn.is-active span{background:rgba(255,255,255,.22);color:#fff}

.pubs{list-style:none;margin:0;padding:0;counter-reset:pub}
.pub{
  display:grid;grid-template-columns:96px 1fr;gap:24px;
  padding:24px 0;border-top:1px solid var(--line);
  transition:opacity .3s,transform .3s;
}
.pub:last-child{border-bottom:1px solid var(--line)}
.pub.hide{display:none}
.pub-yr{font-family:var(--mono);font-size:14px;color:var(--ink-3);padding-top:3px;letter-spacing:.02em}
.rev{
  display:inline-block;font-size:10.5px;line-height:1.25;letter-spacing:.08em;text-transform:uppercase;
  color:var(--accent-2);border:1px solid color-mix(in srgb,var(--accent-2) 40%,transparent);
  padding:4px 8px;border-radius:5px;text-align:center;
}
.pub-body h3{font-family:var(--sans);font-size:16.5px;font-weight:500;line-height:1.55;letter-spacing:-.005em;margin-bottom:8px;color:var(--ink)}
.me{font-weight:700;color:var(--accent)}
.venue{font-size:14px;color:var(--ink-3);margin:0 0 8px}
.doi{
  font-family:var(--mono);font-size:12.5px;color:var(--ink-3);text-decoration:none;
  border-bottom:1px solid transparent;transition:color .18s,border-color .18s;
}
.doi:hover{color:var(--accent);border-bottom-color:var(--accent)}

.reports{margin-top:52px;background:var(--bg-alt);border:1px solid var(--line);border-radius:var(--r);padding:32px}
.reports h3{font-size:13px;font-family:var(--mono);font-weight:500;text-transform:uppercase;letter-spacing:.12em;color:var(--ink-3);margin-bottom:20px}
.reports ul{list-style:none;margin:0;padding:0;display:grid;gap:16px}
.reports li{font-size:15px;color:var(--ink-2);line-height:1.6;padding-left:20px;position:relative}
.reports li::before{content:'▸';position:absolute;left:0;color:var(--accent)}
.reports strong{color:var(--ink);font-weight:600}

/* ── Talks ─────────────────────────────────────────────── */
.feature{
  display:grid;grid-template-columns:auto 1fr;gap:26px;align-items:center;
  background:linear-gradient(135deg,var(--deep),color-mix(in srgb,var(--deep) 78%,var(--accent)));
  color:#eef5f4;border-radius:var(--r);padding:34px;margin-bottom:44px;box-shadow:var(--shadow-lg);
}
.feature-mark{
  font-family:var(--serif);font-size:26px;font-weight:700;letter-spacing:.02em;
  width:82px;height:82px;border-radius:18px;display:grid;place-items:center;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);color:#7fd6cf;
}
.feature h3{font-size:22px;margin-bottom:9px;color:#fff}
.feature p{margin:0;color:#c3d4d3;font-size:15.5px}
.feature strong{color:#fff;font-weight:600}

.talks-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:start}
.col-head{display:flex;align-items:center;gap:10px;font-size:15px;font-family:var(--mono);font-weight:500;text-transform:uppercase;letter-spacing:.1em;color:var(--ink-3);margin-bottom:22px}
.col-head em{font-style:normal;color:var(--ink-3);opacity:.7}
.dot{width:9px;height:9px;border-radius:50%;flex-shrink:0}
.dot.presenter{background:var(--accent)}
.dot.coauthor{background:var(--accent-2)}
.talks{list-style:none;margin:0;padding:0;display:grid;gap:2px}
.talks li{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-sm);
  padding:17px 20px;transition:border-color .2s,transform .2s;
}
.talks li:hover{border-color:color-mix(in srgb,var(--accent) 40%,var(--line));transform:translateX(3px)}
.talks p{margin:0 0 7px;font-size:15px;line-height:1.5;color:var(--ink)}
.tk-type{
  display:inline-block;font-size:10.5px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;
  padding:3px 8px;border-radius:4px;margin-bottom:9px;
}
.tk-type.oral{background:var(--accent);color:#fff}
.tk-type.poster{background:var(--accent-soft);color:var(--accent);border:1px solid color-mix(in srgb,var(--accent) 25%,transparent)}
.tk-type.up{background:var(--accent-2);color:#fff}
.tk-meta{display:block;font-family:var(--mono);font-size:12px;color:var(--ink-3);line-height:1.5}
.talks.compact li{padding:14px 18px}
.talks.compact p{font-size:14.5px}

/* ── Service ───────────────────────────────────────────── */
.svc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.svc{transition:transform .25s,box-shadow .25s}
.svc:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.ticks{list-style:none;margin:0;padding:0;display:grid;gap:14px}
.ticks li{position:relative;padding-left:28px;font-size:15px;color:var(--ink-2);line-height:1.6}
.ticks li::before{
  content:'';position:absolute;left:0;top:6px;width:16px;height:16px;border-radius:50%;
  background:var(--accent-soft);
}
.ticks li::after{
  content:'';position:absolute;left:5px;top:10px;width:6px;height:3px;
  border-left:1.8px solid var(--accent);border-bottom:1.8px solid var(--accent);
  transform:rotate(-45deg);
}
.ticks strong{color:var(--ink);font-weight:600}

/* ── Contact ───────────────────────────────────────────── */
.contact{
  background:var(--deep);color:#e6efee;padding:clamp(70px,9vw,110px) 0;
  position:relative;overflow:hidden;
}
.contact::before{
  content:'';position:absolute;width:70vw;height:70vw;max-width:800px;max-height:800px;
  right:-16%;top:-46%;border-radius:50%;filter:blur(90px);opacity:.3;
  background:radial-gradient(circle,#0d6e6e,transparent 66%);
}
.contact-inner{position:relative;z-index:1;max-width:760px}
.contact h2{font-size:clamp(31px,5vw,50px);color:#fff;margin-bottom:16px;letter-spacing:-.03em}
.contact > .wrap > div > p{color:#a9bfbe;font-size:17px;max-width:56ch}
.contact-links{display:flex;flex-wrap:wrap;gap:12px 30px;margin-top:30px}
.contact-links a,.contact-links span{
  display:inline-flex;align-items:center;gap:10px;text-decoration:none;
  font-size:15.5px;color:#e6efee;font-weight:500;
  border-bottom:1px solid transparent;padding-bottom:2px;transition:color .18s,border-color .18s;
}
.contact-links a:hover{color:#7fd6cf;border-bottom-color:#7fd6cf}
.contact-links svg{color:#7fd6cf;flex-shrink:0}
.contact-links span{color:#a9bfbe}

/* ── Footer ────────────────────────────────────────────── */
.footer{background:var(--bg);border-top:1px solid var(--line);padding:30px 0}
.footer-inner{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;align-items:center}
.footer p{margin:0;font-size:13.5px;color:var(--ink-3)}
.footer-note{font-family:var(--mono);font-size:12px !important}

/* ── Reveal animation ──────────────────────────────────── */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .7s cubic-bezier(.2,.8,.3,1),transform .7s cubic-bezier(.2,.8,.3,1)}
.reveal.in{opacity:1;transform:none}

/* ── Responsive ────────────────────────────────────────── */
@media (max-width:980px){
  .about-grid{grid-template-columns:1fr;gap:40px}
  .rcards,.svc-grid{grid-template-columns:1fr}
  .rcards > .rcard:last-child:nth-child(odd) ul{grid-template-columns:1fr}
  .talks-grid{grid-template-columns:1fr;gap:40px}
}
@media (max-width:760px){
  body{font-size:16px}
  .wrap{padding-inline:20px}
  .nav-links{
    position:absolute;top:70px;left:0;right:0;flex-direction:column;gap:2px;
    background:var(--bg);border-bottom:1px solid var(--line);padding:14px 20px 20px;
    box-shadow:var(--shadow-lg);display:none;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 14px;font-size:16px}
  .burger{display:flex}
  .hero h1{font-size:clamp(46px,15vw,72px)}
  .hero-role{max-width:none;font-size:21px}
  .hero-role em{white-space:normal}
  .stats{grid-template-columns:repeat(2,1fr)}
  .pub{grid-template-columns:1fr;gap:10px}
  .pub-yr{padding-top:0}
  .feature{grid-template-columns:1fr;gap:18px;padding:26px}
  .feature-mark{width:62px;height:62px;font-size:20px;border-radius:14px}
  .card,.rcard,.toolbelt,.reports{padding:24px}
  .hero-cta .btn{flex:1 1 auto;justify-content:center}
}

@media print{
  .nav,.hero-bg,.hero-cta,.filters,.footer,.theme-toggle{display:none !important}
  body{background:#fff;color:#000;font-size:11pt}
  .section,.contact{padding:18px 0;background:#fff !important;color:#000 !important}
  .reveal{opacity:1 !important;transform:none !important}
  .pub{break-inside:avoid}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
  .haze,.particles i{animation:none}
  .particles i{opacity:.26}
}