/* dsermar.dev — design system
   Dark-first. One accent. Sans for reading, mono for technical labels only. */

@font-face{font-family:"Geist";src:url("/assets/fonts/Geist-Variable.woff2") format("woff2");font-weight:100 900;font-style:normal;font-display:swap}
@font-face{font-family:"Geist Mono";src:url("/assets/fonts/GeistMono-Variable.woff2") format("woff2");font-weight:100 900;font-style:normal;font-display:swap}

:root{
  color-scheme:dark;
  --bg:#0a0b0d;
  --surface:#101216;
  --surface-2:#15181d;
  --line:#21252c;
  --line-2:#2e333b;
  --fg:#eceef1;
  --fg-2:#a9b0ba;
  --fg-3:#8b939f;
  --accent:#8ab4ff;
  --accent-soft:rgba(138,180,255,.1);
  --accent-line:rgba(138,180,255,.35);
  --ok:#5fd394;
  --sans:"Geist",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:"Geist Mono",ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --radius:10px;
  --radius-sm:6px;
  --wrap:1120px;
  --gutter:clamp(16px,4vw,32px);
  --nav-h:60px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 16px)}
body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--sans);font-size:1rem;line-height:1.6;font-feature-settings:"ss01","cv11";-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}
img,svg{max-width:100%;display:block}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure{margin:0}
ul,ol{padding:0;list-style:none}
a{color:var(--accent);text-decoration:none;text-underline-offset:3px}
a:hover{text-decoration:underline}
code{font-family:var(--mono);font-size:.88em;background:var(--surface-2);border:1px solid var(--line);border-radius:4px;padding:.05em .35em;color:var(--fg)}
strong{font-weight:600;color:var(--fg)}
::selection{background:rgba(138,180,255,.3)}

:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}

.skip{position:absolute;left:var(--gutter);top:-100px;z-index:200;background:var(--fg);color:var(--bg);padding:10px 14px;border-radius:var(--radius-sm);font-weight:600}
.skip:focus{top:12px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

.wrap{max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.mono{font-family:var(--mono)}

/* ------------------------------------------------------------ nav */
.nav{position:sticky;top:0;z-index:100;background:rgba(10,11,13,.82);backdrop-filter:saturate(1.4) blur(12px);-webkit-backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid var(--line)}
.nav-inner{height:var(--nav-h);display:flex;align-items:center;gap:24px}
.brand{font-family:var(--mono);font-size:14px;font-weight:500;color:var(--fg);display:inline-flex;align-items:center;gap:8px;white-space:nowrap}
.brand:hover{text-decoration:none;color:var(--fg)}
.brand-mark{width:22px;height:22px;flex:none}
.nav-panel{display:flex;flex:1;align-items:center;gap:16px}
.nav-main{margin-left:auto}
.nav-links{display:flex;gap:2px}
.nav-links a{display:block;padding:8px 10px;font-size:14px;color:var(--fg-2);border-radius:var(--radius-sm)}
.nav-links a:hover{color:var(--fg);background:var(--surface-2);text-decoration:none}
.nav-actions{display:flex;align-items:center;gap:10px}
.lang{display:inline-flex;border:1px solid var(--line-2);border-radius:var(--radius-sm);overflow:hidden;font-family:var(--mono);font-size:12.5px}
.lang a,.lang span{padding:5px 9px;color:var(--fg-3);line-height:1.4}
.lang a:hover{color:var(--fg);text-decoration:none;background:var(--surface-2)}
.lang [aria-current]{color:var(--fg);background:var(--surface-2)}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line-2);color:var(--fg);border-radius:var(--radius-sm);width:44px;height:44px;align-items:center;justify-content:center;cursor:pointer}
.nav-toggle svg{width:20px;height:20px}
.nav-toggle .i-close{display:none}
.nav.open .nav-toggle .i-open{display:none}
.nav.open .nav-toggle .i-close{display:block}

/* ------------------------------------------------------------ buttons, tags */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 18px;border-radius:var(--radius-sm);font-size:15px;font-weight:500;border:1px solid transparent;transition:background-color .15s,border-color .15s,color .15s;white-space:nowrap}
.btn:hover{text-decoration:none}
.btn svg{width:16px;height:16px;flex:none}
.btn-primary{background:var(--fg);color:var(--bg)}
.btn-primary:hover{background:#fff;color:var(--bg)}
.btn-secondary{border-color:var(--line-2);color:var(--fg);background:var(--surface)}
.btn-secondary:hover{border-color:var(--fg-3);color:var(--fg)}
.btn-sm{min-height:36px;padding:0 12px;font-size:14px}
.link-quiet{display:inline-flex;align-items:center;gap:6px;min-height:44px;color:var(--fg-2);font-size:15px}
.link-quiet:hover{color:var(--fg)}
.link-quiet svg{width:16px;height:16px}

.tags{display:flex;flex-wrap:wrap;gap:6px}
.tag{font-family:var(--mono);font-size:12.5px;line-height:1.5;padding:2px 8px;border:1px solid var(--line-2);border-radius:5px;color:var(--fg-2);background:var(--surface);white-space:nowrap}
.eyebrow{font-family:var(--mono);font-size:12.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--fg-3)}

.dot{width:8px;height:8px;border-radius:50%;background:var(--ok);flex:none;box-shadow:0 0 0 3px rgba(95,211,148,.15)}

/* ------------------------------------------------------------ hero */
.hero{padding-block:clamp(48px,9vw,112px) clamp(48px,7vw,88px);border-bottom:1px solid var(--line);position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background-image:radial-gradient(circle at 1px 1px,rgba(255,255,255,.055) 1px,transparent 0);background-size:24px 24px;mask-image:radial-gradient(ellipse 70% 80% at 75% 40%,#000 20%,transparent 75%);-webkit-mask-image:radial-gradient(ellipse 70% 80% at 75% 40%,#000 20%,transparent 75%);pointer-events:none}
.hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:clamp(32px,6vw,80px);align-items:center}
.status{display:inline-flex;align-items:center;gap:10px;font-size:14px;color:var(--fg-2);margin-bottom:28px;flex-wrap:wrap}
.status .sep{color:var(--line-2)}
.hero h1{font-size:clamp(2.3rem,1.4rem + 4vw,4rem);line-height:1.04;letter-spacing:-.035em;font-weight:600}
.hero h1 .role{display:block;margin-top:14px;font-size:clamp(1.2rem,1rem + 1vw,1.6rem);letter-spacing:-.015em;font-weight:500;color:var(--fg-2);line-height:1.25}
.hero .stack{margin-top:18px;font-family:var(--mono);font-size:clamp(13px,1.2vw,14.5px);color:var(--accent);letter-spacing:.01em}
.hero .lead{margin-top:22px;font-size:clamp(1rem,.95rem + .25vw,1.125rem);color:var(--fg-2);max-width:60ch;text-wrap:pretty}
.hero .direction{margin-top:14px;display:inline-flex;align-items:center;gap:10px;font-size:15px;color:var(--fg)}
.hero .direction svg{width:16px;height:16px;color:var(--accent);flex:none}
.hero-ctas{margin-top:32px;display:flex;flex-wrap:wrap;gap:10px 12px;align-items:center}
.hero-ctas .links{display:flex;gap:4px 16px;margin-left:6px;flex-wrap:wrap}

.hero-visual{border:1px solid var(--line);border-radius:14px;background:linear-gradient(180deg,var(--surface),rgba(16,18,22,.6));padding:clamp(16px,3vw,28px) clamp(16px,3vw,28px) 16px}
.hero-visual svg{width:100%;height:auto;max-width:440px;margin-inline:auto}
.hero-visual figcaption{margin-top:14px;padding-top:12px;border-top:1px solid var(--line);font-size:13px;color:var(--fg-3);line-height:1.5}
.hv-line{fill:none;stroke:var(--line-2);stroke-width:1.25}
.hv-node rect{fill:var(--bg);stroke:var(--line-2)}
.hv-node text{font-family:var(--mono);font-size:12.5px;fill:var(--fg-2);letter-spacing:.02em}
.hv-edge rect{stroke-dasharray:3 3}
.hv-group text{fill:var(--fg);font-weight:500}
.hv-accent rect{stroke:var(--accent-line);fill:rgba(138,180,255,.06)}
.hv-accent text{fill:var(--accent)}

/* ------------------------------------------------------------ sections */
.section{padding-block:clamp(64px,9vw,112px);border-bottom:1px solid var(--line)}
.section-head{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:16px 48px;align-items:end;margin-bottom:clamp(32px,5vw,56px)}
.section-head h2{font-size:clamp(1.75rem,1.3rem + 1.6vw,2.4rem);letter-spacing:-.03em;line-height:1.1;font-weight:600;margin-top:10px}
.section-head p{color:var(--fg-2);max-width:52ch;text-wrap:pretty}

/* areas strip */
.areas{padding-block:0;border-bottom:1px solid var(--line)}
.areas-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));border-inline:1px solid var(--line)}
.area{padding:24px 20px 28px;border-right:1px solid var(--line)}
.area:last-child{border-right:0}
.area h3{font-family:var(--mono);font-size:12.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--fg-3);font-weight:500;margin-bottom:14px}
.area ul{display:flex;flex-direction:column;gap:6px;font-size:15px;color:var(--fg)}

/* ------------------------------------------------------------ experience */
.xp{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);overflow:hidden}
.xp-head{display:flex;flex-wrap:wrap;gap:16px 32px;justify-content:space-between;align-items:flex-start;padding:clamp(20px,3vw,32px);border-bottom:1px solid var(--line)}
.xp-head h3{font-size:clamp(1.25rem,1.1rem + .6vw,1.5rem);letter-spacing:-.02em;font-weight:600;line-height:1.25}
.xp-company{margin-top:6px;color:var(--fg-2);font-size:15px;display:flex;flex-wrap:wrap;gap:4px 12px}
.xp-company b{color:var(--accent);font-weight:500}
.xp-period{font-family:var(--mono);font-size:13.5px;color:var(--fg-2);border:1px solid var(--line-2);border-radius:999px;padding:4px 12px;white-space:nowrap;display:inline-flex;align-items:center;gap:8px}
.xp-figs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));border-bottom:1px solid var(--line)}
.xp-fig{padding:20px clamp(20px,3vw,32px);display:flex;align-items:baseline;gap:14px}
.xp-fig+.xp-fig{border-left:1px solid var(--line)}
.xp-fig .n{font-family:var(--mono);font-size:clamp(1.6rem,1.3rem + 1vw,2rem);font-weight:500;letter-spacing:-.03em;color:var(--fg)}
.xp-fig .l{color:var(--fg-2);font-size:14.5px;line-height:1.4}
.xp-groups{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}
.xp-group{padding:clamp(20px,3vw,32px);display:flex;flex-direction:column;gap:14px}
.xp-group:nth-child(odd){border-right:1px solid var(--line)}
.xp-group:nth-child(n+3){border-top:1px solid var(--line)}
.xp-group h4{font-family:var(--mono);font-size:12.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--fg-3);font-weight:500}
.xp-group ul{display:flex;flex-direction:column;gap:10px;color:var(--fg-2);font-size:15px}
.xp-group li{position:relative;padding-left:18px;text-wrap:pretty}
.xp-group li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:1px;background:var(--fg-3)}
.xp-group .tags{margin-top:auto;padding-top:4px;flex-direction:row;gap:6px;font-size:inherit}
.xp-group .tags li{padding-left:8px}
.xp-group .tags li::before{display:none}
.edu-inline{margin-top:20px;display:flex;flex-wrap:wrap;gap:6px 16px;align-items:baseline;color:var(--fg-2);font-size:15px;padding:16px 20px;border:1px dashed var(--line-2);border-radius:var(--radius)}
.edu-inline .eyebrow{margin-right:4px}

/* ------------------------------------------------------------ projects */
.projects{display:grid;gap:20px}
.pcard{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);overflow:hidden;transition:border-color .2s}
.pcard:hover{border-color:var(--line-2)}
.pcard-body{padding:clamp(20px,3vw,32px);display:flex;flex-direction:column;gap:16px}
.pcard-meta{display:flex;flex-wrap:wrap;gap:6px 14px;font-family:var(--mono);font-size:12.5px;color:var(--fg-3);letter-spacing:.02em}
.pcard-meta span+span::before{content:"·";margin-right:14px;color:var(--line-2)}
.pcard h3{font-size:clamp(1.3rem,1.15rem + .6vw,1.6rem);letter-spacing:-.02em;line-height:1.2;font-weight:600}
.pcard h3 a{color:var(--fg)}
.pcard h3 a:hover{text-decoration:none;color:var(--accent)}
.pcard-body>p:not(.pcard-meta){color:var(--fg-2);text-wrap:pretty}
.pcard-actions{margin-top:auto;display:flex;flex-wrap:wrap;gap:10px;padding-top:8px}
.pcard-flow{border-left:1px solid var(--line);background:var(--bg);padding:clamp(20px,3vw,32px);display:flex;flex-direction:column;justify-content:center;gap:12px}

.pipe{display:flex;flex-direction:column;align-items:stretch;counter-reset:s}
.pipe li{counter-increment:s;position:relative;font-family:var(--mono);font-size:13.5px;color:var(--fg);border:1px solid var(--line-2);border-radius:var(--radius-sm);padding:8px 12px 8px 40px;background:var(--surface)}
.pipe li::before{content:counter(s,decimal-leading-zero);position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--fg-3);font-size:12px}
.pipe li+li{margin-top:18px}
.pipe li+li::after{content:"";position:absolute;left:50%;top:-18px;height:18px;width:1px;background:var(--line-2)}
.pipe li:last-child{border-color:var(--accent-line);color:var(--accent);background:var(--accent-soft)}

.gh-cta{margin-top:20px;display:flex;flex-wrap:wrap;gap:16px 24px;align-items:center;justify-content:space-between;padding:20px clamp(20px,3vw,32px);border:1px solid var(--line);border-radius:var(--radius)}
.gh-cta h3{font-size:1.1rem;font-weight:600;letter-spacing:-.01em;display:flex;align-items:center;gap:10px}
.gh-cta h3 svg{width:20px;height:20px}
.gh-cta p{color:var(--fg-2);font-size:15px;margin-top:2px}

/* ------------------------------------------------------------ skills */
.legend{display:flex;flex-wrap:wrap;gap:8px 20px;margin-bottom:24px;font-size:14px;color:var(--fg-2)}
.legend span{display:inline-flex;align-items:center;gap:8px}
.skills{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:16px}
.skill{border:1px solid var(--line);border-radius:var(--radius);padding:20px;background:var(--surface)}
.skill h3{font-size:15px;font-weight:600;margin-bottom:14px}
.chip{display:inline-flex;align-items:center;gap:7px;font-family:var(--mono);font-size:12.5px;line-height:1.5;padding:3px 9px;border-radius:5px;border:1px dashed var(--line-2);color:var(--fg-2)}
.chip.work{border-style:solid;border-color:var(--accent-line);background:var(--accent-soft);color:var(--fg)}
.chip.work::before,.lg-work::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);flex:none}
.lg-work,.lg-other{display:inline-flex;width:22px;height:14px;border-radius:4px;align-items:center;justify-content:center}
.lg-work{border:1px solid var(--accent-line);background:var(--accent-soft)}
.lg-other{border:1px dashed var(--line-2)}

/* ------------------------------------------------------------ certs */
.certs-grid{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:20px;align-items:start}
.cert-list{display:grid;gap:12px}
.cert{display:flex;gap:16px;align-items:center;padding:18px 20px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface)}
.cert-badge{flex:none;width:56px;height:56px;border-radius:8px;border:1px solid var(--line-2);display:grid;place-items:center;font-family:var(--mono);font-size:13px;font-weight:600;color:var(--fg);background:var(--bg)}
.cert h4{font-size:16px;font-weight:600;line-height:1.35}
.cert p{font-size:14px;color:var(--fg-2);margin-top:2px}
.cert a{font-size:14px}
.side-block{border:1px solid var(--line);border-radius:var(--radius);padding:20px;background:var(--surface)}
.side-block+.side-block{margin-top:12px}
.side-block h3{font-family:var(--mono);font-size:12.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--fg-3);font-weight:500;margin-bottom:12px}
.side-block .t{font-weight:600;line-height:1.35}
.side-block .m{color:var(--fg-2);font-size:14.5px;margin-top:4px}
.kv{display:grid;grid-template-columns:auto 1fr;gap:8px 16px;font-size:15px}
.kv dt{color:var(--fg-2)}
.kv dd{font-family:var(--mono);font-size:14px;color:var(--fg)}

/* ------------------------------------------------------------ about */
.about-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:clamp(24px,5vw,64px);align-items:start}
.prose{display:flex;flex-direction:column;gap:18px;font-size:clamp(1rem,.96rem + .2vw,1.1rem);color:var(--fg-2);max-width:62ch}
.prose p{text-wrap:pretty}
.trajectory{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);overflow:hidden}
.trajectory .cmd{font-family:var(--mono);font-size:13px;color:var(--fg-3);padding:12px 20px;border-bottom:1px solid var(--line);background:var(--bg)}
.trajectory .cmd b{color:var(--accent);font-weight:400}
.traj-step{padding:18px 20px}
.traj-step+.traj-step{border-top:1px solid var(--line)}
.traj-step h3{font-family:var(--mono);font-size:12.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--fg-3);font-weight:500;margin-bottom:10px;display:flex;align-items:center;gap:8px}
.traj-step.is-focus h3{color:var(--accent)}
.traj-arrow{display:flex;justify-content:center;border-top:1px solid var(--line);color:var(--fg-3);padding:4px 0}
.traj-arrow svg{width:16px;height:16px}
.traj-arrow+.traj-step{border-top:0}

/* ------------------------------------------------------------ contact */
.contact-card{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:clamp(24px,5vw,64px);border:1px solid var(--line);border-radius:14px;padding:clamp(24px,5vw,56px);background:radial-gradient(ellipse 60% 90% at 100% 0%,rgba(138,180,255,.07),transparent 60%),var(--surface)}
.contact-card h2{font-size:clamp(2rem,1.4rem + 2.4vw,3rem);letter-spacing:-.035em;line-height:1.05;font-weight:600;margin-top:14px}
.contact-card p{margin-top:16px;color:var(--fg-2);max-width:48ch;text-wrap:pretty}
.contact-card .tags{margin-top:20px}
.contact-links{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:var(--radius);background:var(--bg);align-self:start}
.contact-links li+li{border-top:1px solid var(--line)}
.contact-links a{display:grid;grid-template-columns:72px minmax(0,1fr) 16px;align-items:center;gap:12px;padding:14px 18px;min-height:52px;color:var(--fg)}
.contact-links a:hover{text-decoration:none;background:var(--surface-2)}
.contact-links .k{font-family:var(--mono);font-size:12.5px;color:var(--fg-3);text-transform:uppercase;letter-spacing:.06em}
.contact-links .v{font-size:15px;overflow-wrap:anywhere}
.contact-links svg{width:16px;height:16px;color:var(--fg-3)}
.contact-links a:hover svg{color:var(--accent)}

/* ------------------------------------------------------------ footer */
.footer{padding-block:32px;color:var(--fg-3);font-size:14px}
.footer-inner{display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between;align-items:center}
.footer a{color:var(--fg-2)}
.footer nav{display:flex;flex-wrap:wrap;gap:4px 20px}

/* ------------------------------------------------------------ case study */
.cs-head{padding-block:clamp(40px,7vw,80px) clamp(32px,5vw,56px);border-bottom:1px solid var(--line)}
.crumb{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--fg-2);min-height:44px}
.crumb svg{width:16px;height:16px}
.cs-head h1{margin-top:12px;font-size:clamp(2rem,1.3rem + 3vw,3.25rem);letter-spacing:-.035em;line-height:1.08;font-weight:600;max-width:22ch}
.cs-head .tagline{margin-top:18px;font-size:clamp(1.02rem,.95rem + .35vw,1.2rem);color:var(--fg-2);max-width:62ch;text-wrap:pretty}
.cs-facts{margin-top:32px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border:1px solid var(--line);border-radius:var(--radius);background:var(--surface)}
.cs-facts div{padding:14px 18px}
.cs-facts div+div{border-left:1px solid var(--line)}
.cs-facts dt{font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--fg-3)}
.cs-facts dd{margin-top:4px;font-size:15px}
.cs-body{padding-block:clamp(40px,6vw,72px)}
.cs-sec{display:grid;grid-template-columns:200px minmax(0,1fr);gap:16px 48px;padding-block:32px;border-top:1px solid var(--line)}
.cs-sec:first-child{border-top:0;padding-top:0}
.cs-sec>h2{font-family:var(--mono);font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--fg-3);font-weight:500;padding-top:4px}
.cs-sec>h2 span{color:var(--accent);margin-right:8px}
.cs-sec .prose{max-width:68ch}
.cs-list{display:flex;flex-direction:column;gap:14px;color:var(--fg-2);max-width:68ch}
.cs-list li{position:relative;padding-left:20px;text-wrap:pretty}
.cs-list li::before{content:"";position:absolute;left:0;top:.72em;width:9px;height:1px;background:var(--accent)}
.cs-next{margin-top:24px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.cs-next a{display:flex;flex-direction:column;gap:6px;padding:20px 24px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);color:var(--fg)}
.cs-next a:hover{text-decoration:none;border-color:var(--line-2)}
.cs-next .eyebrow{display:flex;align-items:center;gap:6px}
.cs-next .t{font-size:1.1rem;font-weight:600;letter-spacing:-.01em}

/* architecture diagrams (HTML) */
.arch{margin:0;border:1px solid var(--line);border-radius:var(--radius);background:var(--bg);overflow:hidden}
.arch-canvas{padding:clamp(16px,3vw,28px);background-image:radial-gradient(circle at 1px 1px,rgba(255,255,255,.05) 1px,transparent 0);background-size:20px 20px}
.arch figcaption{border-top:1px solid var(--line);padding:12px clamp(16px,3vw,28px);font-size:14px;color:var(--fg-2);background:var(--surface)}
.ar-row{display:flex;align-items:stretch;gap:0}
.ar-group{flex:1 1 0;min-width:0;border:1px dashed var(--line-2);border-radius:8px;padding:30px 10px 10px;position:relative;background:rgba(10,11,13,.6)}
.ar-gl{position:absolute;top:8px;left:10px;font-family:var(--mono);font-size:12px;color:var(--fg-3);letter-spacing:.04em}
.ar-stack{display:flex;flex-direction:column;gap:8px;height:100%;justify-content:center}
.ar-node{border:1px solid var(--line-2);border-radius:6px;background:var(--surface);padding:9px 11px;display:flex;flex-direction:column;gap:1px}
.ar-node.is-accent{border-color:var(--accent-line);background:var(--accent-soft)}
.ar-t{font-size:14.5px;font-weight:600;color:var(--fg)}
.ar-s{font-family:var(--mono);font-size:12px;color:var(--fg-2);line-height:1.45;overflow-wrap:anywhere}
.ar-link{flex:0 0 88px;display:flex;align-items:center;justify-content:center;position:relative}
.ar-link::before{content:"";position:absolute;left:4px;right:6px;top:50%;height:1px;background:var(--fg-3)}
.ar-link::after{content:"";position:absolute;right:4px;top:50%;width:7px;height:7px;border-top:1px solid var(--fg-3);border-right:1px solid var(--fg-3);transform:translateY(-50%) rotate(45deg)}
.ar-link span{position:relative;z-index:1;font-family:var(--mono);font-size:12px;color:var(--fg-2);background:var(--bg);padding:2px 3px;transform:translateY(-14px);text-align:center;line-height:1.2;white-space:nowrap}

/* ------------------------------------------------------------ 404 */
.nf{min-height:60vh;display:flex;flex-direction:column;justify-content:center;gap:16px;padding-block:64px}
.nf h1{font-size:clamp(2rem,1.5rem + 2vw,3rem);letter-spacing:-.03em;font-weight:600}
.nf p{color:var(--fg-2)}

/* ------------------------------------------------------------ motion (one orchestrated reveal) */
@media (prefers-reduced-motion:no-preference){
  .reveal>*{animation:rise .7s cubic-bezier(.2,.7,.2,1) both}
  .reveal>*:nth-child(2){animation-delay:.05s}
  .reveal>*:nth-child(3){animation-delay:.1s}
  .reveal>*:nth-child(4){animation-delay:.15s}
  .reveal>*:nth-child(5){animation-delay:.2s}
  .reveal>*:nth-child(6){animation-delay:.25s}
  .reveal>*:nth-child(7){animation-delay:.3s}
  .hv-line{stroke-dasharray:1;stroke-dashoffset:1;animation:draw .5s ease-out forwards;animation-delay:calc(.35s + var(--i) * .16s)}
  .dot{animation:pulse 2.4s ease-in-out infinite}
}
@keyframes rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
@keyframes draw{to{stroke-dashoffset:0}}
@keyframes pulse{0%,100%{box-shadow:0 0 0 3px rgba(95,211,148,.15)}50%{box-shadow:0 0 0 5px rgba(95,211,148,.05)}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* ------------------------------------------------------------ responsive */
@media (max-width:1080px){
  .nav-links a{padding:8px 7px;font-size:13.5px}
  .areas-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .area:nth-child(3){border-right:0}
  .area:nth-child(n+4){border-top:1px solid var(--line)}
}
@media (max-width:960px){
  .nav-toggle{display:inline-flex}
  .nav-panel{display:none}
  .nav.open .nav-panel{display:flex}
  .nav-panel{position:absolute;top:var(--nav-h);left:0;right:0;flex-direction:column;gap:16px;padding:16px var(--gutter) 24px;background:var(--bg);border-bottom:1px solid var(--line);max-height:calc(100dvh - var(--nav-h));overflow-y:auto}
  .nav-links{flex-direction:column;margin:0;gap:0}
  .nav-links a{padding:12px 4px;font-size:16px;border-bottom:1px solid var(--line);border-radius:0}
  .nav-actions{justify-content:space-between}
  .hero-grid{grid-template-columns:minmax(0,1fr)}
  .hero-visual{max-width:520px}
  .section-head{grid-template-columns:minmax(0,1fr)}
  .pcard{grid-template-columns:minmax(0,1fr)}
  .pcard-flow{border-left:0;border-top:1px solid var(--line)}
  .pipe{flex-direction:row;flex-wrap:wrap;gap:10px 22px}
  .pipe li+li{margin-top:0}
  .pipe li+li::after{left:-22px;top:50%;width:22px;height:1px}
  .certs-grid,.about-grid,.contact-card{grid-template-columns:minmax(0,1fr)}
  .cs-sec{grid-template-columns:minmax(0,1fr);gap:12px}
  .cs-facts{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cs-facts div:nth-child(3){border-left:0}
  .cs-facts div:nth-child(n+3){border-top:1px solid var(--line)}
}
@media (max-width:860px){
  .ar-row{flex-direction:column}
  .ar-link{flex:0 0 48px}
  .ar-link::before{left:50%;right:auto;top:4px;bottom:6px;width:1px;height:auto}
  .ar-link::after{right:auto;left:50%;top:auto;bottom:4px;transform:translateX(-50%) rotate(135deg)}
  .ar-link span{transform:translateX(calc(50% + 10px));background:none}
  .ar-stack{flex-direction:row;flex-wrap:wrap}
  .ar-stack .ar-node{flex:1 1 180px}
}
@media (max-width:720px){
  .areas-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .area{border-right:1px solid var(--line)!important;border-top:0}
  .area:nth-child(2n){border-right:0!important}
  .area:nth-child(n+3){border-top:1px solid var(--line)}
  .area:last-child{grid-column:1/-1;border-right:0!important}
  .xp-groups{grid-template-columns:minmax(0,1fr)}
  .xp-group:nth-child(odd){border-right:0}
  .xp-group+.xp-group{border-top:1px solid var(--line)}
  .xp-figs{grid-template-columns:minmax(0,1fr)}
  .xp-fig+.xp-fig{border-left:0;border-top:1px solid var(--line)}
  .cs-next{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:520px){
  .status .sep{display:none}
  .status{gap:4px 10px}
  .pipe{flex-direction:column;flex-wrap:nowrap;gap:0}
  .pipe li+li{margin-top:14px}
  .pipe li+li::after{left:50%;top:-14px;width:1px;height:14px}
  .hero-ctas .btn{flex:1 1 100%}
  .hero-ctas .links{margin-left:0}
  .contact-links a{grid-template-columns:60px minmax(0,1fr) 16px;padding:14px}
  .cs-facts{grid-template-columns:minmax(0,1fr)}
  .cs-facts div+div{border-left:0;border-top:1px solid var(--line)}
  .cert{align-items:flex-start;padding:16px}
  .cert-badge{width:48px;height:48px;font-size:12px}
}
@media (max-width:380px){
  .areas-grid{grid-template-columns:minmax(0,1fr)}
  .area{border-right:0!important;border-top:1px solid var(--line)}
  .area:first-child{border-top:0}
  .brand-text{display:none}
}
@media (min-width:1600px){
  :root{--wrap:1240px}
  body{font-size:1.0625rem}
}