/* ============================================================
   Ayush Katiyar — portfolio
   Fintech-product visual language: navy type on white,
   dodger-blue actions, rounded cards, soft blue shadows.
   ============================================================ */

:root{
  --white:#FFFFFF;
  --tint:#F5F9FF;
  --tint-2:#EBF3FF;
  --navy:#02264F;
  --navy-2:#063A78;
  --ink:#0B2545;
  --muted:#5A6B85;
  --muted-2:#8496AE;
  --line:#DDE7F5;
  --line-2:#EEF3FA;
  --blue:#0D94FB;
  --blue-dark:#0A7BD1;
  --blue-soft:#E7F3FE;
  --green:#12A67B;
  --shadow:0 1px 2px rgba(2,38,82,.05),0 4px 16px rgba(2,38,82,.05);
  --shadow-lift:0 8px 30px rgba(2,38,82,.11);

  /* derived / component tokens — overridden by the dark theme */
  --bg:#FFFFFF;
  --nav-bg:rgba(255,255,255,.92);
  --tint-2-t:rgba(235,243,255,0);
  --band:#02264F;
  --band-fg:#FFFFFF;
  --band-muted:#AFC6E4;
  --border-hover:#C9DDF6;
  --chip-hover:#DCEDFE;
  --diagram-stroke:#C4D8F0;
  --edge:#B9CFE9;
  --code-fg:#CFE3FA;
  --code-key:#7CC5FF;
  --scheme:light;

  --sans:"Plus Jakarta Sans",system-ui,-apple-system,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,monospace;

  --r:14px;
  --r-sm:10px;
  --gutter:28px;
  --max:1180px;
}

/* ---------------- dark theme ----------------
   Same structure, inverted surfaces. Every colour above is a token,
   so the theme is a palette swap rather than a second stylesheet. */
:root[data-theme="dark"]{
  --white:#111C2C;
  --tint:#0C1523;
  --tint-2:#16243A;
  --navy:#E9F1FB;
  --navy-2:#BBD6F3;
  --ink:#D7E3F2;
  --muted:#96A9C2;
  --muted-2:#7189A6;
  --line:#243550;
  --line-2:#1B2739;
  --blue:#3FAAFF;
  --blue-dark:#6DC0FF;
  --blue-soft:#16304B;
  --green:#2FD3A4;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 4px 16px rgba(0,0,0,.32);
  --shadow-lift:0 8px 30px rgba(0,0,0,.5);

  --bg:#070D17;
  --nav-bg:rgba(7,13,23,.9);
  --tint-2-t:rgba(22,36,58,0);
  --band:#0C1626;
  --band-fg:#EAF2FC;
  --band-muted:#93A9C7;
  --border-hover:#2F4A6E;
  --chip-hover:#1D3A58;
  --diagram-stroke:#2C4059;
  --edge:#3A5273;
  --code-fg:#CFE3FA;
  --code-key:#7CC5FF;
  --scheme:dark;
}
html{color-scheme:var(--scheme)}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font:400 17.5px/1.68 var(--sans);
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--blue);color:#fff}
h1,h2,h3,h4{font-family:var(--sans);color:var(--navy);margin:0;line-height:1.14;letter-spacing:-.022em;font-weight:800}
p{margin:0}
a{color:var(--blue);text-decoration:none}
a:hover{color:var(--blue-dark)}
:focus-visible{outline:2.5px solid var(--blue);outline-offset:3px;border-radius:4px}
img,svg{max-width:100%}
code{font-family:var(--mono);font-size:.9em;background:var(--tint-2);color:var(--navy-2);padding:2px 6px;border-radius:5px}

.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 var(--gutter)}
.rule{border:0;border-top:1px solid var(--line-2);margin:0}

/* eyebrow label */
.label{
  font:700 12px/1 var(--sans);
  letter-spacing:.1em;text-transform:uppercase;color:var(--blue);
}
.label-y{color:var(--blue)}

/* pill badge */
.badge{
  display:inline-flex;align-items:center;gap:9px;
  background:var(--blue-soft);color:var(--navy-2);
  border-radius:999px;padding:9px 16px;
  font:600 14px/1 var(--sans);
}
.badge .dot{width:8px;height:8px;border-radius:50%;background:var(--green);flex:none}

/* ---------------- nav ---------------- */
.nav{
  position:sticky;top:0;z-index:40;
  background:var(--nav-bg);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line-2);
}
.nav .wrap{display:flex;align-items:center;gap:24px;height:72px}
.nav .mark{
  display:flex;align-items:center;gap:11px;flex:1;min-width:0;overflow:hidden;
  font-weight:800;font-size:18px;color:var(--navy);letter-spacing:-.02em;
}
.nav .mark:hover{color:var(--navy)}
.nav .mark .dot{width:9px;height:9px;border-radius:50%;background:var(--blue);flex:none}
.nav .mark .name{white-space:nowrap}
.nav .mark .initials{display:none}
.nav .mark .sub{font:600 12px/1 var(--sans);color:var(--muted-2);letter-spacing:.02em}
.nav ul{display:flex;align-items:center;gap:30px;margin:0;padding:0;list-style:none}
.nav ul a{font:600 15px/1 var(--sans);color:var(--ink)}
.nav ul a:hover{color:var(--blue)}
.nav ul a[aria-current]{color:var(--blue)}

/* ---------------- buttons ---------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font:700 15px/1 var(--sans);
  padding:15px 24px;border-radius:999px;
  border:1.5px solid var(--line);background:var(--white);color:var(--navy);
  cursor:pointer;box-shadow:var(--shadow);
  transition:border-color .16s ease,color .16s ease,box-shadow .2s ease,transform .16s ease,background .16s ease;
}
.btn:hover{border-color:var(--blue);color:var(--blue);box-shadow:var(--shadow-lift);transform:translateY(-2px)}
.btn-fill{background:var(--blue);border-color:var(--blue);color:#fff}
.btn-fill:hover{background:var(--blue-dark);border-color:var(--blue-dark);color:#fff}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.35);color:#fff;box-shadow:none}
.btn-ghost:hover{background:rgba(255,255,255,.1);border-color:#fff;color:#fff}

/* ---------------- hero ---------------- */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(900px 460px at 78% -8%,var(--tint-2) 0%,var(--tint-2-t) 70%),
    linear-gradient(180deg,var(--tint) 0%,var(--white) 78%);
}
.hero-top{padding:88px 0 60px;position:relative}
.hero h1{
  font-size:clamp(38px,5.6vw,66px);
  max-width:20ch;margin-top:26px;letter-spacing:-.03em;line-height:1.08;
}
.hero h1 em{font-style:normal;color:var(--blue)}
.hero .lede{
  margin-top:24px;max-width:56ch;color:var(--muted);
  font-size:clamp(17.5px,1.6vw,20px);line-height:1.62;
}
.hero .lede b{color:var(--navy);font-weight:700}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:8px;margin-top:38px;align-items:center;
}
.hero-meta span{
  font:600 13px/1 var(--sans);color:var(--muted);
  background:var(--white);border:1px solid var(--line);
  border-radius:999px;padding:9px 14px;box-shadow:var(--shadow);
}
.hero-meta span::before{content:none}

/* work peek cards at the fold */
.peek{padding-bottom:64px}
.peek-head{display:flex;justify-content:space-between;align-items:baseline;padding:0 0 20px;gap:20px}
.peek-head .label{color:var(--muted-2)}
.peek-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;background:transparent;border:0}
.peek-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--r);
  padding:26px 24px 24px;display:flex;flex-direction:column;gap:11px;
  box-shadow:var(--shadow);
  transition:box-shadow .22s ease,transform .22s ease,border-color .22s ease;
}
.peek-card:hover{box-shadow:var(--shadow-lift);transform:translateY(-4px);border-color:var(--blue)}
.peek-card h3{font-size:20px;line-height:1.25}
.peek-card p{font-size:15.5px;color:var(--muted);line-height:1.5}
.peek-card .go{margin-top:auto;font:700 14px/1 var(--sans);color:var(--blue);display:inline-block}

/* ---------------- stat band ---------------- */
.stats{background:var(--band);border:0;padding:56px 0}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat{color:var(--band-fg)}
.stat .n{font-size:clamp(32px,3.8vw,46px);font-weight:800;letter-spacing:-.03em;color:var(--band-fg);line-height:1.05}
.stat .n small{font-size:.55em;font-weight:700;color:var(--blue);margin-left:2px}
.stat p{margin-top:10px;color:var(--band-muted);font-size:15px;line-height:1.45}

/* ---------------- sections ---------------- */
section{padding:92px 0;border-top:1px solid var(--line-2)}
.section-tint{background:var(--tint)}
.sec-head{display:grid;grid-template-columns:1fr;gap:0;margin-bottom:52px;max-width:none}
.sec-head h2{font-size:clamp(30px,4.2vw,46px);letter-spacing:-.028em;max-width:24ch;margin-top:14px}
.sec-head .sub{color:var(--muted);margin-top:18px;max-width:62ch;font-size:18px}

/* ---------------- work list ---------------- */
.entry{
  display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:30px;
  background:var(--white);border:1px solid var(--line);border-radius:var(--r);
  padding:32px;margin-bottom:22px;box-shadow:var(--shadow);
  transition:box-shadow .22s ease,border-color .22s ease;
}
.entry:hover{box-shadow:var(--shadow-lift);border-color:var(--border-hover)}
.entry:last-of-type{margin-bottom:0}
.entry-main{display:flex;flex-direction:column;min-width:0}
.entry-cta{margin-top:auto;padding-top:24px}
.entry h3{font-size:clamp(23px,2.6vw,30px);letter-spacing:-.026em}
.entry h3 a{color:var(--navy)}
.entry h3 a:hover{color:var(--blue)}
.entry .kicker{margin-bottom:12px}
.entry .body{color:var(--muted);margin-top:14px;max-width:60ch;font-size:17px}
.entry .body b{color:var(--navy);font-weight:700}
.stack{display:flex;flex-wrap:wrap;gap:7px;margin-top:18px}
.stack span{
  font:600 12.5px/1 var(--mono);color:var(--navy-2);
  background:var(--blue-soft);border-radius:6px;padding:8px 10px;
}
.entry .aside{
  background:var(--tint);border:1px solid var(--line-2);border-radius:var(--r-sm);
  padding:24px;align-self:stretch;
}
.entry .aside dt{
  font:700 12px/1 var(--sans);letter-spacing:.09em;text-transform:uppercase;
  color:var(--blue);margin-bottom:9px;
}
.entry .aside dd{margin:0 0 18px;color:var(--muted);font-size:15.5px;line-height:1.55}
.entry .aside dd:last-child{margin-bottom:0}

/* ---------------- about ---------------- */
.about-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px}
.prose p{margin-bottom:18px;color:var(--muted);font-size:17.5px}
.prose p:last-child{margin-bottom:0}
.prose b{color:var(--navy);font-weight:700}
.pull{
  font-size:clamp(21px,2.4vw,27px);font-weight:700;line-height:1.35;
  letter-spacing:-.02em;color:var(--navy);
  background:var(--blue-soft);border-left:4px solid var(--blue);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  padding:24px 26px;margin:32px 0;
}
.principles{margin:0;padding:0;list-style:none;counter-reset:p;display:grid;gap:14px}
.principles li{
  counter-increment:p;background:var(--white);
  border:1px solid var(--line);border-radius:var(--r-sm);padding:22px 24px;
  display:grid;grid-template-columns:38px 1fr;gap:16px;box-shadow:var(--shadow);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.principles li:hover{border-color:var(--blue);box-shadow:var(--shadow-lift)}
.principles li::before{
  content:counter(p,decimal-leading-zero);
  font:800 13px/1.7 var(--sans);color:var(--blue);
  background:var(--blue-soft);border-radius:8px;
  width:34px;height:34px;display:grid;place-items:center;
}
.principles h4{font-size:18.5px;letter-spacing:-.018em;line-height:1.3}
.principles p{color:var(--muted);font-size:16px;margin-top:7px;line-height:1.55}

.facts{
  background:var(--white);border:1px solid var(--line);
  border-radius:var(--r);box-shadow:var(--shadow);overflow:hidden;
}
.facts .row{display:flex;justify-content:space-between;gap:18px;padding:16px 22px;border-top:1px solid var(--line-2)}
.facts .row:first-child{border-top:none}
.facts dt{font:700 12px/1.6 var(--sans);letter-spacing:.08em;text-transform:uppercase;color:var(--muted-2)}
.facts dd{margin:0;text-align:right;font-size:16px;font-weight:600;color:var(--navy)}
.edu{margin-top:26px;background:var(--white);border:1px solid var(--line);border-radius:var(--r);padding:6px 22px;box-shadow:var(--shadow)}
.edu > .label{padding-top:18px;display:block}
.edu h4{font-size:17px;margin-bottom:4px}
.edu .item{padding:18px 0;border-top:1px solid var(--line-2)}
.edu .item:first-of-type{border-top:none}
.edu p{color:var(--muted);font-size:15.5px}
.edu .score{font:700 13px/1 var(--sans);color:var(--green);margin-top:9px;letter-spacing:.02em}

/* ---------------- diagrams ---------------- */
.figure{
  border:1px solid var(--line);background:var(--white);
  border-radius:var(--r);padding:28px;box-shadow:var(--shadow);
}
.figure svg{width:100%;height:auto;display:block}
.figure figcaption{
  margin-top:22px;padding-top:18px;border-top:1px solid var(--line-2);
  color:var(--muted);font-size:15.5px;line-height:1.55;
  display:flex;gap:20px;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;
}
.figure figcaption p{max-width:56ch}
.node rect{fill:var(--white);stroke:var(--diagram-stroke);stroke-width:1.4}
.node text{font:600 12.5px var(--mono);fill:var(--muted)}
.node.on rect{stroke:var(--blue);stroke-width:2;fill:var(--blue-soft)}
.node.on text{fill:var(--navy)}
.node.terminal rect{stroke-dasharray:4 3}
.node.ghost rect{fill:var(--tint);stroke-dasharray:3 3}
.edge{stroke:var(--edge);stroke-width:1.4;fill:none}
.edge.dashed{stroke-dasharray:5 4}
.edge.y{stroke:var(--blue)}
.arrow{fill:var(--edge)}
.arrow.y{fill:var(--blue)}
.edge-label{font:500 11.5px var(--mono);fill:var(--muted-2)}
.lane-label{font:700 11.5px var(--sans);fill:var(--muted-2);letter-spacing:.08em}
.lane-bg{fill:var(--tint)}
#token circle{fill:var(--blue)}
#token{transition:transform .85s cubic-bezier(.5,.05,.3,1);opacity:0}
#token.live{opacity:1}
.run{
  font:700 13.5px/1 var(--sans);
  padding:12px 18px;border:1.5px solid var(--line);border-radius:999px;
  background:var(--white);color:var(--navy);cursor:pointer;white-space:nowrap;
  transition:border-color .16s ease,color .16s ease;
}
.run:hover{border-color:var(--blue);color:var(--blue)}

/* ---------------- case study page ---------------- */
.case-hero{
  padding:70px 0 60px;
  background:
    radial-gradient(760px 380px at 82% -12%,var(--tint-2) 0%,var(--tint-2-t) 72%),
    linear-gradient(180deg,var(--tint) 0%,var(--white) 88%);
}
.back{font:700 14px/1 var(--sans);color:var(--blue)}
.back:hover{color:var(--blue-dark)}
.case-hero h1{font-size:clamp(33px,5vw,58px);letter-spacing:-.03em;max-width:22ch;margin-top:22px}
.case-hero .lede{margin-top:24px;max-width:62ch;color:var(--muted);font-size:clamp(17.5px,1.6vw,20px);line-height:1.62}
.spec{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  background:var(--white);border:1px solid var(--line);
  border-radius:var(--r);margin-top:44px;box-shadow:var(--shadow);overflow:hidden;
}
.spec div{padding:22px 24px;border-left:1px solid var(--line-2)}
.spec div:first-child{border-left:0}
.spec dt{font:700 11.5px/1 var(--sans);letter-spacing:.09em;text-transform:uppercase;color:var(--blue);margin-bottom:10px}
.spec dd{margin:0;font-size:15.5px;line-height:1.5;color:var(--navy);font-weight:600}
.case section{padding:76px 0}
.case-body{display:grid;grid-template-columns:minmax(0,1fr);gap:0}
.case-body > *{min-width:0}
.case-body > .label{margin-bottom:12px}
.case-body h2{font-size:clamp(26px,3.4vw,40px);letter-spacing:-.028em;max-width:26ch}
.case-body .prose{max-width:66ch;margin-top:20px}
.case-body .prose h3{font-size:20px;margin:32px 0 10px;letter-spacing:-.018em}
.case-body .prose ul{margin:16px 0;padding-left:0;list-style:none}
.case-body .prose li{position:relative;padding-left:26px;margin-bottom:11px;color:var(--muted)}
.case-body .prose li::before{
  content:"";position:absolute;left:0;top:.52em;
  width:14px;height:14px;border-radius:50%;
  background:var(--blue-soft);
  box-shadow:inset 0 0 0 3px var(--white),inset 0 0 0 5px var(--blue);
}
.case-body .prose li b{color:var(--navy);font-weight:700}
.case-body .figure{margin-top:32px}
.code{
  font:500 14px/1.75 var(--mono);color:var(--code-fg);
  background:var(--band);border:0;border-radius:var(--r-sm);
  padding:22px 24px;margin-top:24px;overflow-x:auto;white-space:pre;
  box-shadow:var(--shadow);
}
.code b{color:var(--code-key);font-weight:600}
.nextprev{display:grid;grid-template-columns:1fr 1fr;gap:18px;padding:56px 0 8px}
.nextprev a{
  background:var(--white);border:1px solid var(--line);border-radius:var(--r);
  padding:30px 32px;display:block;box-shadow:var(--shadow);
  transition:box-shadow .22s ease,border-color .22s ease,transform .22s ease;
}
.nextprev a:hover{box-shadow:var(--shadow-lift);border-color:var(--blue);transform:translateY(-3px)}
.nextprev .label{margin-bottom:11px;display:block}
.nextprev h3{font-size:22px;letter-spacing:-.024em}
.nextprev .r{text-align:right}

/* ---------------- closing CTA band ---------------- */
.cta-band{background:var(--band);border:0;padding:82px 0}
.cta-band h2{color:var(--band-fg);font-size:clamp(29px,4vw,46px);max-width:24ch;letter-spacing:-.028em}
.cta-band p{color:var(--band-muted);margin-top:18px;max-width:52ch;font-size:18px}
.cta-band .row{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}

/* ---------------- contact ---------------- */
.contact{background:var(--tint)}
.contact h2{font-size:clamp(30px,4.4vw,50px);letter-spacing:-.03em;max-width:22ch;margin-top:16px}
.rows{
  margin-top:40px;max-width:800px;background:var(--white);
  border:1px solid var(--line);border-radius:var(--r);
  box-shadow:var(--shadow);overflow:hidden;
}
.crow{display:flex;align-items:center;gap:22px;padding:20px 26px;border-top:1px solid var(--line-2)}
.crow:first-child{border-top:none}
.crow .lbl{
  font:700 11.5px/1 var(--sans);letter-spacing:.09em;text-transform:uppercase;
  color:var(--muted-2);width:124px;flex:none;
}
.crow .val{font-size:clamp(16.5px,1.8vw,19px);font-weight:600;color:var(--navy);flex:1;min-width:0;overflow-wrap:anywhere}
.crow .val a{color:var(--navy)}
.crow .val a:hover{color:var(--blue)}
.copy{
  font:700 12px/1 var(--sans);letter-spacing:.06em;text-transform:uppercase;
  background:var(--white);border:1.5px solid var(--line);border-radius:999px;
  padding:10px 14px;color:var(--muted);cursor:pointer;
  transition:border-color .16s ease,color .16s ease;
}
.copy:hover{border-color:var(--blue);color:var(--blue)}

footer{padding:34px 0 46px;color:var(--muted-2);font-size:14.5px;border-top:1px solid var(--line-2)}
footer .wrap{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap}
footer a{color:var(--muted)}
footer a:hover{color:var(--blue)}
footer .fsocial{display:flex;gap:16px;flex-wrap:wrap}

/* ---------------- theme toggle ---------------- */
.theme-toggle{
  flex:none;display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;padding:0;
  background:var(--white);border:1.5px solid var(--line);border-radius:999px;
  color:var(--muted);cursor:pointer;
  transition:border-color .16s ease,color .16s ease,background .16s ease;
}
.theme-toggle:hover{border-color:var(--blue);color:var(--blue)}
.theme-toggle svg{width:17px;height:17px;display:block}
.theme-toggle .ic-moon{display:none}
:root[data-theme="dark"] .theme-toggle .ic-sun{display:none}
:root[data-theme="dark"] .theme-toggle .ic-moon{display:block}

/* ---------------- skills ---------------- */
.skill-rows{
  background:var(--white);border:1px solid var(--line);border-radius:var(--r);
  overflow:hidden;box-shadow:var(--shadow);
}
.srow{display:flex;align-items:flex-start;gap:24px;padding:19px 26px;border-top:1px solid var(--line-2)}
.srow:first-child{border-top:none}
.srow .lbl{
  font:700 11.5px/1 var(--sans);letter-spacing:.09em;text-transform:uppercase;
  color:var(--muted-2);width:150px;flex:none;padding-top:9px;
}
.srow .stack{margin-top:0;flex:1;min-width:0}
.skill-links{display:flex;flex-wrap:wrap;align-items:center;gap:18px;flex:1;min-width:0;padding-top:6px}
.skill-links a{font:600 14.5px/1 var(--sans)}

/* ---------------- responsive ---------------- */
@media (max-width:1000px){
  .entry{grid-template-columns:1fr;gap:24px;padding:26px}
  .entry-cta{margin-top:0;padding-top:20px}
  .about-grid{grid-template-columns:1fr;gap:44px}
  .spec{grid-template-columns:repeat(2,1fr)}
  .spec div:nth-child(3){border-left:0}
  .spec div:nth-child(n+3){border-top:1px solid var(--line-2)}
  .peek-grid{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:repeat(2,1fr);gap:28px}
  section{padding:70px 0}
  .hero-top{padding:60px 0 46px}
}
@media (max-width:620px){
  .srow{flex-direction:column;gap:12px;padding:18px 20px}
  .srow .lbl{width:100%;padding-top:0}
  .skill-links{padding-top:0}
  :root{--gutter:20px}
  body{font-size:17px}
  .nav .wrap{height:64px;gap:14px}
  .nav .mark .sub{display:none}
  .nav .mark .name{display:none}
  .nav .mark .initials{display:inline}
  .nav ul{gap:15px}
  .nav ul li.hide-sm{display:none}
  .nav ul a{font-size:13.5px}
  footer .wrap{gap:12px}
  footer .fsocial{gap:14px;order:3;width:100%}
  .spec{grid-template-columns:1fr}
  .spec div{border-left:0;border-top:1px solid var(--line-2)}
  .spec div:first-child{border-top:0}
  .stat-grid{grid-template-columns:1fr;gap:24px}
  .nextprev{grid-template-columns:1fr}
  .nextprev .r{text-align:left}
  .crow{flex-wrap:wrap;gap:10px;padding:18px 20px}
  .crow .lbl{width:100%}
  .figure{padding:18px}
  .pull{padding:20px}
  .case section{padding:56px 0}
  .btn{width:100%}
  .hero-actions,.cta-band .row{flex-direction:column;align-items:stretch}
}
@media (max-width:400px){
  /* too narrow for one row: brand + toggle, then the links beneath */
  :root .nav .wrap,:root .nav.scrolled .wrap{flex-wrap:wrap;height:auto;padding-top:11px;padding-bottom:11px;gap:9px 10px}
  .nav .mark .name{display:inline}
  .nav .mark .initials{display:none}
  .nav ul{order:3;width:100%;gap:10px;justify-content:space-between}
  .nav ul a{font-size:13px}
  .theme-toggle{width:34px;height:34px}
  .theme-toggle svg{width:15px;height:15px}
}

/* ============================================================
   MOTION — gated on html.anim, which is only added when the
   visitor has not asked for reduced motion.
   ============================================================ */

.progress{
  position:fixed;top:0;left:0;height:3px;width:100%;
  background:var(--blue);transform:scaleX(0);transform-origin:0 50%;
  z-index:60;pointer-events:none;
}
html:not(.anim) .progress{display:none}

.nav{transition:box-shadow .25s ease,background .25s ease}
.nav .wrap{transition:height .25s ease}
.nav.scrolled{box-shadow:0 2px 14px rgba(2,38,82,.07)}
.nav.scrolled .wrap{height:62px}

/* scroll reveal */
html.anim .sec-head,
html.anim .entry,
html.anim .peek-card,
html.anim .principles li,
html.anim .facts,
html.anim .edu .item,
html.anim .crow,
html.anim .spec div,
html.anim .nextprev a,
html.anim .figure,
html.anim .code,
html.anim .pull,
html.anim .stat,
html.anim .case-body h2,
html.anim .case-body .prose,
html.anim .skill-rows,
html.anim .about-grid .prose{
  opacity:0;transform:translateY(22px);
  transition:opacity .72s cubic-bezier(.22,.61,.36,1),transform .72s cubic-bezier(.22,.61,.36,1);
  will-change:opacity,transform;
}
html.anim .in{opacity:1 !important;transform:none !important}

/* hero entrance */
@keyframes riseIn{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:none}}
html.anim .hero-top .badge,
html.anim .hero h1,
html.anim .hero .lede,
html.anim .hero-actions,
html.anim .hero-meta,
html.anim .peek-head,
html.anim .case-hero .back,
html.anim .case-hero .label,
html.anim .case-hero h1,
html.anim .case-hero .lede,
html.anim .cta-band h2,
html.anim .cta-band p,
html.anim .cta-band .row{
  animation:riseIn .85s cubic-bezier(.22,.61,.36,1) both;
}
html.anim .hero-top .badge{animation-delay:.04s}
html.anim .hero h1{animation-duration:1s;animation-delay:.12s}
html.anim .hero .lede{animation-delay:.26s}
html.anim .hero-actions{animation-delay:.38s}
html.anim .hero-meta{animation-delay:.48s}
html.anim .peek-head{animation-delay:.56s}
html.anim .case-hero .back{animation-delay:.04s}
html.anim .case-hero .label{animation-delay:.1s}
html.anim .case-hero h1{animation-duration:1s;animation-delay:.16s}
html.anim .case-hero .lede{animation-delay:.3s}
html.anim .hero h1 em{display:inline-block;animation:riseIn .95s cubic-bezier(.22,.61,.36,1) .4s both}

/* the CTA band animates when scrolled to, not on load */
html.anim .cta-band h2,
html.anim .cta-band p,
html.anim .cta-band .row{animation-play-state:paused}
html.anim .cta-band.in h2,
html.anim .cta-band.in p,
html.anim .cta-band.in .row{animation-play-state:running}

/* diagram draw-in */
html.anim .figure svg .node,
html.anim .figure svg text,
html.anim .figure svg polygon,
html.anim .figure svg line,
html.anim .figure svg rect.lane-bg{
  opacity:0;
  transition:opacity .5s ease,stroke-dashoffset .85s cubic-bezier(.4,0,.3,1);
}
html.anim .figure svg.drawn .node,
html.anim .figure svg.drawn text,
html.anim .figure svg.drawn polygon,
html.anim .figure svg.drawn line,
html.anim .figure svg.drawn rect.lane-bg{opacity:1}

@keyframes glow{0%,100%{stroke-opacity:1}50%{stroke-opacity:.4}}
html.anim .node.on rect{animation:glow 2.6s ease-in-out infinite}

/* hover micro-interactions */
.peek-card .go{transition:transform .28s cubic-bezier(.22,.61,.36,1);display:inline-block}
.peek-card:hover .go{transform:translateX(6px)}
.nextprev h3{transition:transform .28s cubic-bezier(.22,.61,.36,1)}
.nextprev a:hover h3{transform:translateX(5px)}
.nextprev a.r:hover h3{transform:translateX(-5px)}
.stack span{transition:background .18s ease,color .18s ease}
.entry:hover .stack span{background:var(--chip-hover)}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .progress{display:none}
}

/* ---------------- toast ---------------- */
.toast{
  position:fixed;left:50%;bottom:26px;z-index:70;
  transform:translate(-50%,14px);
  background:var(--band);color:var(--band-fg);
  font:600 14.5px/1.3 var(--sans);
  padding:14px 20px;border-radius:999px;
  box-shadow:0 10px 30px rgba(2,38,82,.28);
  opacity:0;pointer-events:none;
  transition:opacity .22s ease,transform .22s ease;
  max-width:calc(100vw - 40px);text-align:center;
}
.toast.show{opacity:1;transform:translate(-50%,0)}
@media (prefers-reduced-motion:reduce){
  .toast{transition:none}
}