/* =========================================================================
   Héctor Inda Díaz — personal site
   Design: minimal/elegant, atmospheric. Signature = contour isolines.
   Type: Fraunces (display) · IBM Plex Sans (body) · IBM Plex Mono (labels)
   ========================================================================= */

:root{
  --ink:#14181d;
  --haze:#f3f5f6;        /* cool off-white page bg */
  --paper:#fbfcfd;       /* cards */
  --mist:#e2e7e9;        /* hairlines / fills */
  --slate:#5a656d;       /* secondary text */
  --slate-soft:#8a949b;  /* tertiary */
  --current:#17605c;     /* deep teal accent */
  --current-deep:#0d423f;
  --current-wash:#e8efee;

  --maxw:1080px;
  --gutter:clamp(20px, 5vw, 56px);

  --serif:"Fraunces", Georgia, "Times New Roman", serif;
  --sans:"IBM Plex Sans", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --mono:"IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --r:14px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--haze);
  color:var(--ink);
  font-family:var(--sans);
  font-size:clamp(15px,1.02vw + 12px,17px);
  line-height:1.62;
  font-feature-settings:"kern","liga";
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit}

/* ---------- type ---------- */
h1,h2,h3{font-family:var(--serif);font-weight:430;line-height:1.06;letter-spacing:-.012em;margin:0}
h1{font-size:clamp(2.6rem,6.2vw,4.5rem)}
h2{font-size:clamp(1.9rem,3.6vw,2.7rem)}
h3{font-size:clamp(1.18rem,1.7vw,1.42rem);line-height:1.18}
p{margin:0 0 1rem}
.lead{font-size:clamp(1.12rem,1.5vw,1.4rem);line-height:1.5;color:#2b333a;max-width:34ch}

.eyebrow{
  font-family:var(--mono);
  font-size:.72rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--current);font-weight:500;
}
.mono{font-family:var(--mono)}

/* ---------- layout ---------- */
.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(56px,8vw,108px);position:relative}
.section + .section{border-top:1px solid var(--mist)}

.sec-head{display:flex;align-items:baseline;gap:18px;margin-bottom:40px}
.sec-head .idx{font-family:var(--mono);font-size:.78rem;color:var(--slate-soft);letter-spacing:.1em;padding-top:.4em}
.sec-head h2{flex:1}

/* ---------- skip link + focus ---------- */
.skip{position:absolute;left:-9999px;top:0;background:var(--ink);color:#fff;padding:10px 16px;border-radius:0 0 8px 0;z-index:200}
.skip:focus{left:0}
a:focus-visible,button:focus-visible{outline:2.5px solid var(--current);outline-offset:3px;border-radius:3px}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:100;background:color-mix(in srgb,var(--haze) 86%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--mist)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:64px;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}
.brand{font-family:var(--serif);font-size:1.18rem;letter-spacing:-.01em;text-decoration:none;font-weight:480}
.brand .dot{color:var(--current)}
.nav-links{display:flex;gap:6px;align-items:center;list-style:none;margin:0;padding:0}
.nav-links a{
  text-decoration:none;font-size:.92rem;color:var(--slate);
  padding:8px 13px;border-radius:8px;transition:color .2s,background .2s;
  font-weight:450;
}
.nav-links a:hover{color:var(--ink);background:var(--current-wash)}
.nav-links a.active{color:var(--current);font-weight:520}
.nav-toggle{display:none;background:none;border:1px solid var(--mist);border-radius:9px;width:42px;height:38px;cursor:pointer;align-items:center;justify-content:center}
.nav-toggle span{display:block;width:18px;height:1.6px;background:var(--ink);position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:1.6px;background:var(--ink)}
.nav-toggle span::before{top:-6px}.nav-toggle span::after{top:6px}

/* ---------- hero ---------- */
.hero{position:relative;overflow:clip;border-bottom:1px solid var(--mist)}
.hero-contours{position:absolute;inset:0;width:100%;height:100%;z-index:0;pointer-events:none}
.hero-in{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(28px,5vw,72px);align-items:center;
  padding-block:clamp(54px,9vw,104px)}
.hero-copy{max-width:38ch}
.hero-copy h1{margin:.5rem 0 1.2rem}
.hero-meta{display:flex;flex-wrap:wrap;gap:8px 18px;font-family:var(--mono);font-size:.78rem;color:var(--slate);margin:1.4rem 0 1.8rem}
.hero-meta span{display:inline-flex;align-items:center;gap:7px}
.hero-meta span::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--current)}

.actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.btn{display:inline-flex;align-items:center;gap:8px;text-decoration:none;font-size:.92rem;font-weight:500;
  padding:11px 18px;border-radius:10px;transition:transform .2s var(--ease),background .2s,border-color .2s,color .2s}
.btn-primary{background:var(--current);color:#fff}
.btn-primary:hover{background:var(--current-deep);transform:translateY(-1px)}
.btn-ghost{background:transparent;border:1px solid var(--mist);color:var(--ink)}
.btn-ghost:hover{border-color:var(--current);color:var(--current);transform:translateY(-1px)}

.iconrow{display:flex;gap:4px;margin-top:18px}
.iconrow a{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:9px;color:var(--slate);text-decoration:none;transition:color .2s,background .2s}
.iconrow a:hover{color:var(--current);background:var(--current-wash)}
.iconrow svg{width:19px;height:19px}

/* portrait */
.portrait{position:relative;justify-self:center}
.portrait-frame{position:relative;width:min(330px,80vw);aspect-ratio:4/5;border-radius:18px;overflow:hidden;
  box-shadow:0 1px 0 var(--mist),0 22px 50px -28px rgba(20,24,29,.5);background:var(--mist)}
.portrait-frame img{width:100%;height:100%;object-fit:cover}
.portrait .tag{position:absolute;left:14px;bottom:14px;z-index:3;background:color-mix(in srgb,var(--ink) 78%,transparent);
  color:#fff;font-family:var(--mono);font-size:.66rem;letter-spacing:.06em;padding:6px 10px;border-radius:7px;backdrop-filter:blur(4px)}

/* ---------- generic cards / grids ---------- */
.grid{display:grid;gap:18px}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}

.card{background:var(--paper);border:1px solid var(--mist);border-radius:var(--r);padding:24px 24px 22px;transition:border-color .25s,transform .25s var(--ease),box-shadow .25s}
.card:hover{border-color:#cdd6d8;transform:translateY(-2px);box-shadow:0 18px 40px -30px rgba(20,24,29,.5)}
.card .eyebrow{display:block;margin-bottom:12px}
.card h3{margin-bottom:8px}
.card p{color:var(--slate);font-size:.95rem;margin-bottom:0}

/* focus strip on home */
.focus-list{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--mist);border-radius:var(--r);overflow:hidden;background:var(--paper)}
.focus-list div{padding:22px 22px}
.focus-list div + div{border-left:1px solid var(--mist)}
.focus-list .k{font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--slate-soft);margin-bottom:8px}
.focus-list .v{font-size:.98rem;color:var(--ink);line-height:1.4}

/* chips */
.chips{display:flex;flex-wrap:wrap;gap:7px;margin-top:14px}
.chip{font-family:var(--mono);font-size:.72rem;color:var(--slate);background:var(--haze);border:1px solid var(--mist);padding:4px 9px;border-radius:999px}

/* interests + education two-up */
.two-up{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,64px)}
.deflist{margin:0}
.edu-item{display:flex;justify-content:space-between;gap:16px;padding:16px 0;border-top:1px solid var(--mist)}
.edu-item:first-child{border-top:none}
.edu-item .deg{font-weight:500}
.edu-item .org{color:var(--slate);font-size:.92rem;margin-top:2px}
.edu-item .yr{font-family:var(--mono);font-size:.8rem;color:var(--slate-soft);white-space:nowrap;padding-top:3px}

.tags{display:flex;flex-wrap:wrap;gap:8px}
.tag{font-size:.86rem;color:var(--current-deep);background:var(--current-wash);border-radius:999px;padding:6px 13px}

/* ---------- work entries ---------- */
.work-entry{display:grid;grid-template-columns:160px 1fr;gap:clamp(18px,3vw,40px);padding:30px 0;border-top:1px solid var(--mist)}
.work-entry:first-of-type{border-top:none}
.work-entry .meta .role{font-family:var(--mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--current);margin-bottom:6px}
.work-entry .meta .org{font-size:.9rem;color:var(--slate)}
.work-entry .meta .yr{font-family:var(--mono);font-size:.78rem;color:var(--slate-soft);margin-top:4px}
.work-entry h3{margin-bottom:10px}
.work-entry .body p{color:var(--slate);font-size:.97rem}
.work-entry .links{display:flex;gap:16px;margin-top:12px;flex-wrap:wrap}
.work-entry .links a{font-size:.86rem;color:var(--current);text-decoration:none;border-bottom:1px solid transparent;transition:border-color .2s}
.work-entry .links a:hover{border-color:var(--current)}

/* ---------- publications ---------- */
.pub{display:grid;grid-template-columns:64px 1fr;gap:22px;padding:26px 0;border-top:1px solid var(--mist)}
.pub:first-of-type{border-top:none}
.pub .yr{font-family:var(--mono);font-size:.9rem;color:var(--current);padding-top:3px}
.pub .ttl{font-family:var(--serif);font-size:1.16rem;line-height:1.28;margin-bottom:6px}
.pub .authors{font-size:.92rem;color:var(--slate);margin-bottom:4px}
.pub .venue{font-size:.88rem;color:var(--slate-soft);font-style:italic}
.pub .links{margin-top:10px}
.pub .links a{font-family:var(--mono);font-size:.78rem;color:var(--current);text-decoration:none;border-bottom:1px solid var(--mist)}
.pub .links a:hover{border-color:var(--current)}
.pub .me{color:var(--ink);font-weight:600}

/* ---------- writing ---------- */
.note-card{display:block;text-decoration:none;background:var(--paper);border:1px solid var(--mist);border-radius:var(--r);padding:26px;transition:border-color .25s,transform .25s var(--ease)}
.note-card:hover{border-color:var(--current);transform:translateY(-2px)}
.note-card .k{font-family:var(--mono);font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:var(--slate-soft);margin-bottom:14px;display:flex;justify-content:space-between}
.note-card h3{margin-bottom:8px}
.note-card p{color:var(--slate);font-size:.95rem;margin:0}
.callout{background:var(--current-wash);border:1px solid color-mix(in srgb,var(--current) 22%,var(--mist));border-radius:var(--r);padding:22px 24px;color:var(--current-deep);font-size:.96rem}

/* ---------- contact / footer ---------- */
.contact{background:var(--ink);color:var(--haze);position:relative;overflow:clip}
.contact .eyebrow{color:#7fd0c9}
.contact h2{color:#fff}
.contact a.maillink{font-family:var(--serif);font-size:clamp(1.6rem,4vw,2.6rem);color:#fff;text-decoration:none;border-bottom:2px solid rgba(255,255,255,.25);transition:border-color .25s}
.contact a.maillink:hover{border-color:#7fd0c9}
.contact .iconrow a{color:#aeb8bd}
.contact .iconrow a:hover{color:#fff;background:rgba(255,255,255,.08)}

.foot{border-top:1px solid var(--mist);background:var(--haze)}
.foot-in{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;padding-block:26px;font-size:.82rem;color:var(--slate)}
.foot-in .mono{font-size:.76rem;color:var(--slate-soft)}

/* ---------- contour signature drift ---------- */
.js-contours{display:block}
.contour-group{transform-origin:center;animation:drift 26s ease-in-out infinite}
@keyframes drift{
  0%,100%{transform:translateX(-14px)}
  50%{transform:translateX(14px)}
}

/* ---------- reveal animation (progressive enhancement) ---------- */
.js .reveal{opacity:0;transform:translateY(16px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.js .reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:860px){
  .hero-in{grid-template-columns:1fr;gap:38px}
  .portrait{order:-1;justify-self:start}
  .portrait-frame{width:min(280px,72vw)}
  .two-up{grid-template-columns:1fr;gap:34px}
  .grid.cols-3{grid-template-columns:1fr 1fr}
  .focus-list{grid-template-columns:1fr}
  .focus-list div + div{border-left:none;border-top:1px solid var(--mist)}
  .work-entry{grid-template-columns:1fr;gap:10px}
  .pub{grid-template-columns:1fr;gap:6px}
  .pub .yr{padding-top:0}
}
@media (max-width:820px){
  .nav-toggle{display:inline-flex}
  .nav-links{position:absolute;top:64px;left:0;right:0;flex-direction:column;align-items:stretch;gap:2px;
    background:var(--haze);border-bottom:1px solid var(--mist);padding:10px var(--gutter) 16px;display:none;z-index:120}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 12px}
}
@media (max-width:600px){
  .grid.cols-2,.grid.cols-3{grid-template-columns:1fr}
}

/* ---------- language toggle + new sections ---------- */
.nav-right{display:flex;align-items:center;gap:8px}
.lang{display:inline-flex;align-items:center;gap:1px;font-family:var(--mono);font-size:.76rem}
.lang a,.lang span.cur{text-decoration:none;color:var(--slate-soft);padding:4px 7px;border-radius:7px;transition:color .2s,background .2s}
.lang .cur{color:var(--current);font-weight:600}
.lang a:hover{color:var(--ink);background:var(--current-wash)}
.lang .sep{color:var(--mist);padding:0}

.linklist{display:flex;flex-wrap:wrap;gap:8px 16px;margin-top:14px}
.linklist a{font-size:.9rem;color:var(--current);text-decoration:none;border-bottom:1px solid var(--mist);transition:border-color .2s}
.linklist a:hover{border-color:var(--current)}

/* ---------- article / prose ---------- */
.article .wrap{max-width:760px}
.prose{font-size:1.06rem;line-height:1.75;color:#2b333a}
.prose h2{font-family:var(--serif);font-weight:460;font-size:clamp(1.4rem,2.6vw,1.85rem);line-height:1.2;margin:2.3rem 0 .7rem;color:var(--ink)}
.prose p{margin:0 0 1.1rem}
.prose a{color:var(--current);text-decoration:none;border-bottom:1px solid var(--mist)}
.prose a:hover{border-color:var(--current)}
.prose blockquote{margin:1.5rem 0;padding:.3rem 0 .3rem 1.2rem;border-left:3px solid var(--current);color:var(--slate);font-style:italic}
.prose .lead{max-width:none}
.article-meta{font-family:var(--mono);font-size:.78rem;color:var(--slate-soft);display:flex;gap:8px 16px;flex-wrap:wrap;margin-top:14px}
.keyfacts{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--mist);border-radius:var(--r);overflow:hidden;background:var(--paper);margin:1.8rem 0}
.keyfacts div{padding:18px 20px}
.keyfacts div+div{border-left:1px solid var(--mist)}
.keyfacts .n{font-family:var(--serif);font-size:1.6rem;color:var(--current);line-height:1}
.keyfacts .l{font-size:.82rem;color:var(--slate);margin-top:6px;line-height:1.35}
@media (max-width:600px){
  .keyfacts{grid-template-columns:1fr}
  .keyfacts div+div{border-left:none;border-top:1px solid var(--mist)}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .js .reveal{opacity:1;transform:none}
}