/* ============================================================
   Gerónimo Ordóñez Navarro — technical portfolio
   Shared stylesheet. Direction: engineering datasheet /
   scientific document. Cool paper, soft pastel tints, spot
   teal + sand accents. Plain static, no build step.
   ============================================================ */

:root{
  /* surfaces */
  --paper:#F4F3EE;
  --paper-2:#FBFAF6;
  --paper-3:#ECEAE3;
  --line:#E4E1D8;
  --line-2:#CFC9BB;

  /* ink */
  --ink:#1B2740;
  --ink-strong:#121B2E;
  --body:#414B5C;
  --muted:#6B7482;

  /* accents (spot color, used small) */
  --teal:#137B95;
  --teal-ink:#0B5D71;      /* small-text legible step */
  --teal-tint:#E7F0F2;
  --teal-line:#BCD7DD;
  --sand:#9C7C4E;
  --sand-tint:#F1EBDD;
  --sand-line:#DFD2BB;

  /* blueprint grid + neural sim */
  --grid-line:rgba(27,39,64,.05);
  --nn:100,110,120;

  /* elevation */
  --shadow-sm:0 1px 2px rgba(27,39,64,.05);
  --shadow-md:0 10px 30px -14px rgba(27,39,64,.22);

  --radius:3px;
  --maxw:1120px;
  --gutter:40px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--paper);
  color:var(--body);
  font-family:'IBM Plex Sans',system-ui,sans-serif;
  font-size:16.5px;line-height:1.62;
  font-feature-settings:"kern","liga";
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{font-family:'Spectral',Georgia,serif;font-weight:500;color:var(--ink);letter-spacing:-.012em;line-height:1.12;text-wrap:balance}
p{text-wrap:pretty}
.mono{font-family:'IBM Plex Mono',ui-monospace,monospace}
a{color:var(--teal-ink);text-decoration:none;transition:color .15s ease}
a:hover{color:var(--teal);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
::selection{background:var(--teal-tint);color:var(--ink-strong)}
:focus-visible{outline:2px solid var(--teal);outline-offset:3px;border-radius:2px}
img{max-width:100%;display:block}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}

/* small uppercase mono label, reused everywhere */
.kicker{font-family:'IBM Plex Mono',monospace;font-size:11px;font-weight:500;
  letter-spacing:.16em;text-transform:uppercase;color:var(--sand)}

/* ---------------------------------------------------- header */
header{position:sticky;top:0;z-index:60;
  background:color-mix(in srgb,var(--paper) 88%,transparent);
  backdrop-filter:saturate(1.1) blur(8px);
  border-bottom:1px solid var(--line)}
.header-inner{display:flex;justify-content:space-between;align-items:center;
  gap:24px;max-width:var(--maxw);margin:0 auto;padding:15px var(--gutter)}
.brand{display:flex;align-items:baseline;gap:12px;min-width:0}
.brand .name-mark{font-family:'IBM Plex Mono',monospace;font-size:12.5px;
  letter-spacing:.14em;text-transform:uppercase;color:var(--ink);white-space:nowrap}
.brand .brand-role{font-family:'IBM Plex Mono',monospace;font-size:11px;
  letter-spacing:.1em;color:var(--muted);white-space:nowrap}
.header-right{display:flex;align-items:center;gap:22px}
.nav-links{display:flex;gap:20px}
.nav-links a{font-family:'IBM Plex Mono',monospace;font-size:12px;
  letter-spacing:.06em;color:var(--muted);text-transform:uppercase}
.nav-links a:hover,.nav-links a.active{color:var(--ink);text-decoration:none}
.nav-links a.active{color:var(--teal-ink)}

.lang-toggle{display:flex;border:1px solid var(--line-2);border-radius:var(--radius);overflow:hidden}
.lang-toggle button{font-family:'IBM Plex Mono',monospace;font-size:11.5px;
  letter-spacing:.06em;padding:6px 11px;background:transparent;border:none;
  cursor:pointer;color:var(--muted);transition:background .15s,color .15s}
.lang-toggle button:hover{color:var(--ink)}
.lang-toggle button.active{background:var(--ink);color:var(--paper)}

/* ---------------------------------------------------- hero */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);
  background-image:linear-gradient(var(--grid-line) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid-line) 1px,transparent 1px);
  background-size:34px 34px;background-position:center top}
#nn-canvas{position:absolute;inset:0;width:100%;height:100%;z-index:0;opacity:.22}
.hero .wrap{position:relative;z-index:2;
  padding:clamp(64px,10vw,116px) var(--gutter) clamp(56px,8vw,92px)}
.sim-label{position:absolute;bottom:14px;right:18px;z-index:3;
  font-size:10px;letter-spacing:.08em;color:var(--muted);opacity:.7}
.sim-label::before{content:"◉ ";color:var(--teal)}
.eyebrow{display:inline-flex;align-items:center;gap:9px;margin-bottom:22px;
  font-family:'IBM Plex Mono',monospace;font-size:12px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--teal-ink)}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--teal);display:inline-block}
.hero h1{font-size:clamp(2.7rem,6vw,4.5rem);line-height:1.03;color:var(--ink-strong);
  max-width:16ch;margin-bottom:24px;font-weight:500}
.hero .tagline{font-size:clamp(1.06rem,1.6vw,1.24rem);color:var(--body);
  max-width:60ch;margin-bottom:34px;line-height:1.55}

/* datasheet meta strip under tagline */
.hero-meta{display:flex;flex-wrap:wrap;gap:0;margin-bottom:38px;
  border-top:1px solid var(--line-2);border-bottom:1px solid var(--line-2)}
.hero-meta .m{padding:13px 26px 13px 0;margin-right:26px;
  border-right:1px solid var(--line);min-width:0}
.hero-meta .m:last-child{border-right:none;margin-right:0}
.hero-meta .m-k{display:block;font-family:'IBM Plex Mono',monospace;font-size:10px;
  letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:4px}
.hero-meta .m-v{font-family:'IBM Plex Mono',monospace;font-size:13px;color:var(--ink)}
.hero-meta .m-v.live{color:var(--teal-ink)}
.hero-meta .m-v.live::before{content:"";display:inline-block;width:7px;height:7px;
  border-radius:50%;background:var(--teal);margin-right:7px;vertical-align:middle;
  box-shadow:0 0 0 3px var(--teal-tint)}

.cta-row{display:flex;gap:14px;flex-wrap:wrap}

/* ---------------------------------------------------- buttons */
.btn{font-family:'IBM Plex Mono',monospace;font-size:12.5px;letter-spacing:.04em;
  padding:12px 22px;border-radius:var(--radius);display:inline-flex;align-items:center;
  gap:8px;cursor:pointer;border:1px solid var(--ink);background:var(--paper-2);
  color:var(--ink);transition:all .16s ease}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.btn-primary:hover{background:var(--teal-ink);border-color:var(--teal-ink);color:#fff}
.btn-ghost{background:transparent;color:var(--ink)}
.btn-ghost:hover{border-color:var(--teal);color:var(--teal-ink);background:var(--teal-tint)}
.btn .arw{transition:transform .16s ease}
.btn:hover .arw{transform:translateX(3px)}

/* ---------------------------------------------------- sections */
section{padding:clamp(56px,7vw,88px) 0}
.section-head{display:flex;align-items:baseline;gap:20px;margin-bottom:clamp(32px,4vw,48px)}
.section-head .sec-no{font-family:'IBM Plex Mono',monospace;font-size:15px;
  font-weight:500;color:var(--sand);letter-spacing:.04em;flex-shrink:0;
  padding-top:2px;font-variant-numeric:tabular-nums}
.section-head h2{font-size:clamp(1.6rem,2.6vw,2.15rem)}
.section-head .sec-rule{flex:1;height:1px;background:var(--line-2);align-self:center;margin-left:6px}

/* ---------------------------------------------------- about (intro) */
.about-grid{display:grid;grid-template-columns:1fr;gap:22px;max-width:74ch}
.about-grid p{color:var(--body);font-size:1.05rem;line-height:1.68}
.about-grid p .lead{font-weight:500;color:var(--ink)}
.about-more{margin-top:30px}
.about-more .link-arrow{font-family:'IBM Plex Mono',monospace;font-size:12.5px;
  letter-spacing:.04em;color:var(--teal-ink);display:inline-flex;gap:8px;align-items:center}
.about-more .link-arrow .arw{transition:transform .16s ease}
.about-more .link-arrow:hover{text-decoration:none;color:var(--teal)}
.about-more .link-arrow:hover .arw{transform:translateX(3px)}

/* ------------------------------------ experience + skills grid */
.exp-skills-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;
  gap:clamp(40px,5vw,64px);align-items:start}

/* timeline — robust rail + centered markers */
.timeline{position:relative}
.timeline::before{content:"";position:absolute;left:6px;top:9px;bottom:9px;
  width:1px;background:var(--line-2)}
.tl-item{position:relative;padding-left:36px;padding-bottom:30px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{content:"";position:absolute;left:6px;top:7px;
  width:11px;height:11px;transform:translateX(-50%);border-radius:50%;
  background:var(--paper);border:1.5px solid var(--teal);z-index:1;box-sizing:border-box}
.tl-item.current::before{background:var(--teal);box-shadow:0 0 0 4px var(--teal-tint)}
.tl-item.current .tl-dates{color:var(--teal-ink)}
.tl-title{font-family:'IBM Plex Sans',sans-serif;font-weight:600;font-size:1.02rem;
  color:var(--ink);margin-bottom:3px;line-height:1.3}
.tl-company{font-family:'IBM Plex Mono',monospace;font-size:.8rem;color:var(--body);letter-spacing:.02em}
.tl-dates{font-family:'IBM Plex Mono',monospace;font-size:.74rem;color:var(--sand);
  letter-spacing:.03em;margin-bottom:9px;font-variant-numeric:tabular-nums}
.tl-bullets{list-style:none;margin:0}
.tl-bullets li{font-size:.9rem;color:var(--body);padding-left:15px;position:relative;
  margin-bottom:4px;line-height:1.5}
.tl-bullets li::before{content:"";position:absolute;left:0;top:.62em;width:5px;height:1px;background:var(--sand)}

/* skills panel */
.skills-panel{position:sticky;top:84px}
.sp-heading{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.13em;
  text-transform:uppercase;color:var(--sand);margin:26px 0 11px}
.sp-heading:first-child{margin-top:0}
.chip-grid{display:flex;flex-wrap:wrap;gap:7px}
.chip{font-family:'IBM Plex Mono',monospace;font-size:11.5px;padding:5px 10px;
  border:1px solid var(--line-2);border-radius:var(--radius);color:var(--body);
  background:var(--paper-2);transition:all .14s ease}
.chip:hover{border-color:var(--line-2);color:var(--ink)}
.chip.accent{border-color:var(--teal-line);color:var(--teal-ink);background:var(--teal-tint)}

/* ---------------------------------------------------- projects */
.projects-parallel{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,3.5vw,44px);align-items:start}
.col-heading{display:flex;align-items:center;gap:10px;
  font-family:'IBM Plex Mono',monospace;font-size:11.5px;letter-spacing:.13em;
  text-transform:uppercase;color:var(--sand);margin:34px 0 16px}
.col-heading:first-child{margin-top:0}
.col-heading::after{content:"";flex:1;height:1px;background:var(--line)}
.neuro-col .col-heading{color:var(--teal-ink)}
.neuro-col .col-heading::after{background:var(--teal-line)}

.pcard{background:var(--paper-2);border:1px solid var(--line-2);border-radius:var(--radius);
  padding:22px 24px 20px;margin-bottom:16px;position:relative;
  box-shadow:var(--shadow-sm);transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease}
.pcard:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.pcard::before{content:"";position:absolute;left:0;top:0;bottom:0;width:2px;
  background:var(--sand-line);border-radius:var(--radius) 0 0 var(--radius)}
.neuro-col .pcard{background:#F7FBFC;border-color:var(--teal-line)}
.neuro-col .pcard::before{background:var(--teal)}
.pcard-head{display:flex;justify-content:space-between;align-items:flex-start;gap:14px;margin-bottom:10px}
.pcard h3{font-size:1.18rem;line-height:1.2}
.pcard .psub{display:block;font-family:'IBM Plex Mono',monospace;font-size:.68rem;
  letter-spacing:.02em;color:var(--muted);margin-top:5px;font-weight:400}
.pcard .badge{font-family:'IBM Plex Mono',monospace;font-size:9px;letter-spacing:.06em;
  color:var(--body);background:var(--paper-3);border:1px solid var(--line-2);
  padding:4px 8px;border-radius:2px;white-space:nowrap;text-transform:uppercase;flex-shrink:0}
.pcard.is-live .badge{color:var(--teal-ink);background:var(--teal-tint);border-color:var(--teal-line)}
.neuro-col .pcard .badge{color:var(--teal-ink);background:var(--teal-tint);border-color:var(--teal-line)}
.pcard .problem{color:var(--body);font-size:.94rem;margin-bottom:14px;line-height:1.55}
.pcard-highlights{list-style:none;margin-bottom:14px}
.pcard-highlights li{font-size:.9rem;color:var(--body);padding-left:16px;position:relative;
  margin-bottom:6px;line-height:1.5}
.pcard-highlights li::before{content:"";position:absolute;left:0;top:.6em;width:6px;height:6px;
  border:1px solid var(--teal);border-radius:1px;transform:rotate(45deg)}
.stack-tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}
.stack-tag{font-family:'IBM Plex Mono',monospace;font-size:10.5px;padding:3px 8px;
  border:1px solid var(--line);border-radius:2px;color:var(--muted);background:var(--paper)}
.tech-badge{display:inline-flex;align-items:center;gap:7px;font-family:'IBM Plex Mono',monospace;
  font-size:10px;letter-spacing:.03em;color:var(--body);border:1px solid var(--line-2);
  padding:3px 9px 3px 7px;border-radius:2px;background:var(--paper)}
.tech-badge .mark{width:9px;height:9px;border-radius:50%;background:#76B900;flex-shrink:0}
.roadmap-box{margin-top:14px;padding:12px 14px;border:1px dashed var(--sand-line);
  border-radius:2px;background:var(--sand-tint)}
.roadmap-box .rm-label{font-family:'IBM Plex Mono',monospace;font-size:9px;letter-spacing:.1em;
  color:var(--sand);text-transform:uppercase;margin-bottom:8px;display:block}
.roadmap-box ul{list-style:none}
.roadmap-box li{font-size:.88rem;color:var(--body);margin-bottom:4px;padding-left:15px;position:relative}
.roadmap-box li::before{content:"→";position:absolute;left:0;color:var(--sand)}

/* ---------------------------------------------------- 2-col lists */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:clamp(36px,5vw,56px)}
.list-block h4{font-family:'IBM Plex Mono',monospace;font-size:11.5px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--sand);margin-bottom:18px}
.list-item{margin-bottom:18px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.list-item:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}
.list-item .primary{font-weight:500;color:var(--ink);margin-bottom:2px}
.list-item .secondary{color:var(--muted);font-size:.9rem;font-family:'IBM Plex Mono',monospace;letter-spacing:.02em}

/* ---------------------------------------------------- footer */
footer{border-top:1px solid var(--ink);padding:clamp(56px,7vw,76px) 0 40px;background:var(--paper-2)}
footer h2{font-size:clamp(1.7rem,3vw,2.3rem);margin-bottom:14px;color:var(--ink-strong)}
footer .tagline{color:var(--body);margin-bottom:34px;max-width:56ch;font-size:1.06rem}
.contact-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));
  gap:24px;margin-bottom:40px;border-top:1px solid var(--line);padding-top:30px}
.contact-item .tb-label{display:block;margin-bottom:6px;font-family:'IBM Plex Mono',monospace;
  font-size:10px;letter-spacing:.11em;color:var(--sand);text-transform:uppercase}
.contact-item a,.contact-item span:not(.tb-label){font-family:'IBM Plex Mono',monospace;font-size:13.5px;color:var(--ink)}
.contact-item a:hover{color:var(--teal-ink)}
.foot-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:26px;
  border-top:1px solid var(--line);font-family:'IBM Plex Mono',monospace;font-size:11px;
  letter-spacing:.02em;color:var(--muted);flex-wrap:wrap;gap:12px}

/* ---------------------------------------------------- about.html page */
.page-hero{border-bottom:1px solid var(--line);padding:clamp(56px,8vw,96px) 0 clamp(40px,5vw,60px);
  background-image:linear-gradient(var(--grid-line) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid-line) 1px,transparent 1px);background-size:34px 34px}
.page-hero .eyebrow{margin-bottom:20px}
.page-hero h1{font-size:clamp(2.4rem,5vw,3.6rem);color:var(--ink-strong);max-width:18ch;margin-bottom:20px}
.page-hero .lede{font-size:clamp(1.1rem,1.8vw,1.34rem);color:var(--body);max-width:62ch;line-height:1.5}

.prose-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:clamp(44px,6vw,72px);align-items:start}
.prose{max-width:70ch}
.prose h3{font-size:clamp(1.35rem,2.2vw,1.7rem);margin:44px 0 16px;color:var(--ink)}
.prose h3:first-child{margin-top:0}
.prose h3 .h-no{font-family:'IBM Plex Mono',monospace;font-size:.62em;color:var(--sand);margin-right:12px;letter-spacing:.04em}
.prose p{color:var(--body);font-size:1.06rem;line-height:1.72;margin-bottom:18px}
.prose p:last-child{margin-bottom:0}
.prose .drop{font-weight:500;color:var(--ink)}
.prose blockquote{border-left:2px solid var(--teal);padding:6px 0 6px 22px;margin:26px 0;
  font-family:'Spectral',serif;font-style:italic;font-size:1.2rem;color:var(--ink);line-height:1.45}

.principles{list-style:none;margin:20px 0 8px}
.principles li{position:relative;padding-left:30px;margin-bottom:16px;color:var(--body);line-height:1.55}
.principles li .p-num{position:absolute;left:0;top:0;font-family:'IBM Plex Mono',monospace;
  font-size:.78rem;color:var(--teal-ink);font-weight:500}
.principles li strong{color:var(--ink);font-weight:600}

/* sidebar cards on about */
.side{position:sticky;top:84px;display:flex;flex-direction:column;gap:20px}
.side-card{background:var(--paper-2);border:1px solid var(--line-2);border-radius:var(--radius);
  padding:20px 22px;box-shadow:var(--shadow-sm)}
.side-card.accent{background:var(--teal-tint);border-color:var(--teal-line)}
.side-card h4{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--sand);margin-bottom:14px}
.side-card.accent h4{color:var(--teal-ink)}
.side-card ul{list-style:none}
.side-card li{font-size:.92rem;color:var(--body);padding:7px 0;border-bottom:1px solid var(--line);line-height:1.4}
.side-card.accent li{border-bottom-color:var(--teal-line)}
.side-card li:last-child{border-bottom:none;padding-bottom:0}
.side-card li:first-child{padding-top:0}
.side-card li .lab{display:block;font-family:'IBM Plex Mono',monospace;font-size:10px;
  letter-spacing:.06em;color:var(--muted);text-transform:uppercase;margin-bottom:2px}
.side-card li .val{color:var(--ink);font-weight:500}
.side-card .now{font-family:'IBM Plex Mono',monospace;font-size:.86rem;color:var(--teal-ink);line-height:1.5}

.back-link{display:inline-flex;gap:8px;align-items:center;font-family:'IBM Plex Mono',monospace;
  font-size:12px;letter-spacing:.04em;color:var(--muted);text-transform:uppercase;margin-bottom:6px}
.back-link:hover{color:var(--ink);text-decoration:none}
.back-link .arw{transition:transform .16s ease}
.back-link:hover .arw{transform:translateX(-3px)}

/* ---------------------------------------------------- responsive */
@media(max-width:900px){
  .exp-skills-grid{grid-template-columns:1fr;gap:44px}
  .skills-panel{position:static}
  .prose-grid{grid-template-columns:1fr;gap:44px}
  .side{position:static;flex-direction:row;flex-wrap:wrap}
  .side-card{flex:1;min-width:220px}
}
@media(max-width:720px){
  :root{--gutter:22px}
  .projects-parallel,.grid-2{grid-template-columns:1fr}
  .grid-2{gap:32px}
  .nav-links{display:none}
  .brand .brand-role{display:none}
  .hero-meta .m{border-right:none;border-bottom:1px solid var(--line);
    width:100%;margin-right:0;padding:11px 0}
  .hero-meta .m:last-child{border-bottom:none}
  .foot-bottom{flex-direction:column;align-items:flex-start}
  .cta-row .btn{flex:1;justify-content:center}
}
@media(max-width:420px){
  body{font-size:16px}
  .side{flex-direction:column}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition:none!important;animation:none!important}
  #nn-canvas{display:none}
}