/* ============================================================
   Diego de S. Souza — personal academic site
   One stylesheet shared by all pages.
   Aesthetic: editorial naturalist — warm paper, beetle-green,
   bronze accents, Fraunces display + Hanken Grotesk body.
   ============================================================ */

:root{
  --paper:      #f4f1ea;   /* warm off-white background      */
  --paper-2:    #ece7db;   /* slightly deeper panel          */
  --ink:        #1d211b;   /* near-black, green-tinted text  */
  --ink-soft:   #4a4f44;   /* secondary text                 */
  --forest:     #1f4736;   /* primary deep beetle green      */
  --moss:       #3d6b52;   /* lighter green                  */
  --bronze:     #9a6b34;   /* accent / labels / links        */
  --bronze-2:   #b98a48;   /* hover accent                   */
  --line:       rgba(29,33,27,.14);
  --shadow:     0 18px 40px -24px rgba(31,71,54,.55);
  --maxw:       1080px;
}

/* ---------- reset ---------- */
*{ box-sizing:border-box; margin:0; padding:0; }
html{ scroll-behavior:smooth; }
body{
  background:var(--paper);
  color:var(--ink);
  font-family:"Hanken Grotesk", system-ui, sans-serif;
  font-size:18px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  /* faint dotted "specimen paper" texture */
  background-image:radial-gradient(rgba(31,71,54,.05) 1px, transparent 1px);
  background-size:22px 22px;
}
img{ max-width:100%; display:block; }
a{ color:var(--bronze); text-decoration:none; }
a:hover{ color:var(--bronze-2); }

/* ---------- layout helpers ---------- */
.wrap{ width:100%; max-width:var(--maxw); margin:0 auto; padding:0 26px; }
.section{ padding:64px 0; }
.section + .section{ border-top:1px solid var(--line); }

.label{
  font-size:.78rem; letter-spacing:.22em; text-transform:uppercase;
  color:var(--bronze); font-weight:700; margin-bottom:14px; display:block;
}
h1,h2,h3{ font-family:"Fraunces", Georgia, serif; line-height:1.12; font-weight:600; color:var(--ink); }
h2.title{ font-size:clamp(1.9rem,4vw,2.7rem); margin-bottom:8px; }
h3{ font-size:1.4rem; color:var(--forest); margin-bottom:10px; }
p{ margin-bottom:1rem; color:var(--ink-soft); }
p strong{ color:var(--ink); }

/* ---------- top bar accent ---------- */
.topbar{ height:5px; background:linear-gradient(90deg,var(--forest),var(--moss) 45%,var(--bronze)); }

/* ---------- navigation ---------- */
header.nav{
  position:sticky; top:0; z-index:50;
  background:rgba(244,241,234,.88);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.nav-inner{ display:flex; align-items:center; justify-content:space-between; gap:18px; padding:14px 26px; max-width:var(--maxw); margin:0 auto; }
.brand{ font-family:"Fraunces",serif; font-weight:600; font-size:1.15rem; color:var(--forest); letter-spacing:.01em; white-space:nowrap; }
.brand span{ color:var(--bronze); }
.menu{ display:flex; gap:26px; list-style:none; flex-wrap:wrap; }
.menu a{
  color:var(--ink); font-weight:600; font-size:.95rem; position:relative; padding:4px 0;
}
.menu a::after{
  content:""; position:absolute; left:0; bottom:-2px; height:2px; width:0;
  background:var(--bronze); transition:width .28s ease;
}
.menu a:hover::after, .menu a.active::after{ width:100%; }
.menu a.active{ color:var(--forest); }

/* ---------- hero (home) ---------- */
.hero{ display:grid; grid-template-columns:1.25fr .85fr; gap:54px; align-items:center; padding:72px 0 64px; }
.hero .role{ font-size:1.05rem; color:var(--moss); font-weight:700; letter-spacing:.04em; margin-bottom:18px; }
.hero h1{ font-size:clamp(2.4rem,6vw,4rem); letter-spacing:-.01em; margin-bottom:6px; }
.hero h1 .sm{ display:block; font-size:.42em; letter-spacing:.16em; text-transform:uppercase; color:var(--bronze); font-family:"Hanken Grotesk",sans-serif; font-weight:700; margin-bottom:14px; }
.portrait{
  position:relative; justify-self:center;
}
.portrait img{
  width:340px; height:340px; object-fit:cover; border-radius:4px;
  box-shadow:var(--shadow); position:relative; z-index:2;
}
.portrait::before{
  content:""; position:absolute; inset:18px -18px -18px 18px;
  border:1px solid var(--bronze); border-radius:4px; z-index:1;
}

/* entrance animation */
.fade{ opacity:0; transform:translateY(16px); animation:rise .8s cubic-bezier(.2,.7,.3,1) forwards; }
.fade.d1{ animation-delay:.08s; } .fade.d2{ animation-delay:.18s; }
.fade.d3{ animation-delay:.28s; } .fade.d4{ animation-delay:.38s; }
@keyframes rise{ to{ opacity:1; transform:none; } }
@media (prefers-reduced-motion:reduce){ .fade{ animation:none; opacity:1; transform:none; } }

/* ---------- contact / link chips ---------- */
.links{ display:flex; flex-wrap:wrap; gap:12px; margin-top:22px; }
.chip{
  display:inline-flex; align-items:center; gap:8px; padding:9px 16px;
  border:1px solid var(--line); border-radius:999px; background:var(--paper);
  color:var(--ink); font-weight:600; font-size:.92rem; transition:all .2s ease;
}
.chip:hover{ border-color:var(--forest); color:var(--forest); transform:translateY(-2px); }
.chip.solid{ background:var(--forest); color:#f4f1ea; border-color:var(--forest); }
.chip.solid:hover{ background:var(--moss); color:#fff; }

/* ---------- page header (inner pages) ---------- */
.page-head{ padding:60px 0 8px; }

/* ---------- research projects ---------- */
.project{ padding:40px 0; border-top:1px solid var(--line); }
.project:first-of-type{ border-top:none; }
.project .body{ max-width:760px; }
.figs{ display:flex; flex-wrap:wrap; gap:18px; margin:22px 0 6px; }
.fig{ flex:1 1 280px; }
.fig img{ width:100%; border-radius:4px; box-shadow:var(--shadow); }
.fig figcaption{ font-size:.85rem; color:var(--ink-soft); margin-top:8px; font-style:italic; }
.funding{ font-size:.95rem; background:var(--paper-2); border-left:3px solid var(--bronze); padding:12px 16px; border-radius:0 4px 4px 0; color:var(--ink-soft); }
.relpubs{ margin-top:18px; }
.relpubs h4{ font-size:.8rem; letter-spacing:.16em; text-transform:uppercase; color:var(--bronze); margin-bottom:10px; }
.relpubs ul{ list-style:none; display:grid; gap:10px; }
.relpubs li{ font-size:.93rem; color:var(--ink-soft); padding-left:18px; position:relative; }
.relpubs li::before{ content:"▸"; position:absolute; left:0; color:var(--moss); }

/* ---------- publications list ---------- */
.pubgroup{ margin-bottom:46px; }
.pubgroup h3{ padding-bottom:8px; border-bottom:1px solid var(--line); margin-bottom:20px; }
ol.pubs{ list-style:none; counter-reset:none; display:grid; gap:16px; }
ol.pubs li{
  display:grid; grid-template-columns:40px 1fr; gap:14px;
  font-size:.97rem; color:var(--ink-soft); line-height:1.55;
}
ol.pubs .n{ font-family:"Fraunces",serif; color:var(--bronze); font-weight:600; text-align:right; }
ol.pubs em{ color:var(--ink); }       /* journal names */
ol.pubs .me{ color:var(--ink); font-weight:700; } /* author = Souza */
.doi{ display:inline-block; font-size:.8rem; font-weight:700; letter-spacing:.04em; color:var(--forest); border-bottom:1px solid var(--bronze); }
.doi:hover{ color:var(--bronze-2); }

/* ---------- galleries ---------- */
.grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(220px,1fr)); gap:16px; }
.card{ position:relative; overflow:hidden; border-radius:5px; box-shadow:var(--shadow); background:#000; }
.card img{ width:100%; aspect-ratio:1/1; object-fit:cover; transition:transform .5s ease, opacity .3s; }
.card:hover img{ transform:scale(1.06); }
.card.captioned figcaption{
  position:absolute; inset:auto 0 0 0; padding:14px 14px 12px;
  font-size:.82rem; line-height:1.4; color:#f4f1ea;
  background:linear-gradient(to top, rgba(15,31,24,.92), rgba(15,31,24,0));
  opacity:0; transform:translateY(8px); transition:all .3s ease;
}
.card.captioned:hover figcaption{ opacity:1; transform:none; }

/* ---------- footer ---------- */
footer.site{ background:var(--forest); color:#dfe7df; margin-top:0; }
footer.site .wrap{ padding:34px 26px; display:flex; flex-wrap:wrap; gap:18px; justify-content:space-between; align-items:center; }
footer.site a{ color:#e8d9bf; font-weight:600; }
footer.site a:hover{ color:#fff; }
footer.site .flinks{ display:flex; gap:20px; flex-wrap:wrap; }
footer.site small{ color:#a9bdae; }

/* ---------- responsive ---------- */
@media (max-width:820px){
  .hero{ grid-template-columns:1fr; gap:32px; padding:48px 0; }
  .portrait{ order:-1; }
  .portrait img{ width:260px; height:260px; }
  .nav-inner{ flex-direction:column; align-items:flex-start; gap:10px; }
  .menu{ gap:16px; }
  body{ font-size:17px; }
}

/* ===== additions: hero banner, split layouts, gallery, lightbox, CV button ===== */

/* top banner photo on home */
.hero-banner{ margin:24px 0 8px; }
.hero-banner img{ width:100%; height:360px; object-fit:cover; border-radius:6px; box-shadow:var(--shadow); }
@media (max-width:760px){ .hero-banner img{ height:220px; } }

/* CV chip (distinct accent) */
.chip.cv{ background:var(--bronze); color:#fff; border-color:var(--bronze); }
.chip.cv:hover{ background:var(--bronze-2); color:#fff; }

/* two-column project layout: text beside media */
.split{ display:flex; gap:36px; align-items:flex-start; }
.split .body{ flex:1 1 55%; }
.split .media{ flex:1 1 45%; display:flex; flex-direction:column; gap:14px; margin-top:6px; }
.split .media img{ width:100%; border-radius:4px; box-shadow:var(--shadow); }
.split .media figcaption{ font-size:.85rem; color:var(--ink-soft); margin-top:6px; font-style:italic; }
@media (max-width:760px){ .split{ flex-direction:column; gap:18px; } .split .media{ flex-basis:auto; } }

/* equal-height image pair (e.g., twig girdled + girdling) */
.figs.equal .fig img{ height:300px; object-fit:cover; }
@media (max-width:760px){ .figs.equal .fig img{ height:240px; } }

/* gallery: three per row */
.grid{ grid-template-columns:repeat(3,1fr); }
@media (max-width:760px){ .grid{ grid-template-columns:repeat(2,1fr); } }
@media (max-width:460px){ .grid{ grid-template-columns:1fr; } }
.grid .card{ cursor:zoom-in; }

/* lightbox */
.lightbox{ position:fixed; inset:0; background:rgba(15,20,16,.93); display:none; align-items:center; justify-content:center; z-index:100; padding:30px; cursor:zoom-out; }
.lightbox.open{ display:flex; }
.lightbox img{ max-width:94%; max-height:88%; border-radius:4px; box-shadow:0 20px 60px rgba(0,0,0,.5); background:#000; }
.lightbox .cap{ position:absolute; left:0; right:0; bottom:18px; text-align:center; color:#e8e3d6; font-size:.9rem; padding:0 24px; }