:root{
  --ink:#0a1026;          /* azul-noite profundo */
  --ink-2:#111a3a;
  --panel:#141e44;
  --paper:#f5f3ec;        /* papel quente */
  --paper-soft:#eceadf;
  --line:rgba(245,243,236,.14);
  --line-dark:rgba(10,16,38,.12);
  --gold:#d9a441;         /* acento ouro/latão de instrumento */
  --green:#1f9e4f;        /* verde da passarela (logo) */
  --green-soft:#34c172;
  --cyan:#6fd6e0;         /* acento ciano espectral */
  --violet:#9a8cff;
  --sun:#e6cf4f;          /* amarelo solar (logo) */
  --txt-dim:rgba(245,243,236,.66);
  --txt-dim-dark:rgba(10,16,38,.62);
  --serif:'Fraunces',Georgia,serif;
  --sans:'Spline Sans',system-ui,sans-serif;
  --mono:'Spline Sans Mono',ui-monospace,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  background:var(--ink);
  color:var(--paper);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%}

/* ---------- TOP BAR ---------- */
.topbar{
  position:fixed;top:0;left:0;right:0;z-index:100;
  display:flex;align-items:center;justify-content:space-between;
  padding:.55rem clamp(1rem,4vw,3rem);
  background:rgba(10,16,38,.72);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:background .3s;
}
.brand{display:flex;align-items:center;gap:.7rem;cursor:pointer}
.brand .glyph{width:38px;height:38px;flex:none;object-fit:contain;border-radius:6px}
.brand b{font-family:var(--serif);font-weight:600;font-size:1.05rem;letter-spacing:.01em;line-height:1}
.brand small{display:block;font-size:.62rem;letter-spacing:.18em;text-transform:uppercase;color:var(--txt-dim);margin-top:2px}

.topbar nav{display:flex;align-items:center;gap:.15rem}
.navitem{position:relative}
.navitem>a,.navitem>button{
  font:500 .82rem/1 var(--sans);
  color:var(--paper);background:none;border:none;cursor:pointer;
  padding:.6rem .7rem;border-radius:7px;display:flex;align-items:center;gap:.3rem;
  letter-spacing:.01em;transition:color .2s,background .2s;white-space:nowrap;
}
.navitem>a:hover,.navitem>button:hover{color:var(--gold);background:rgba(255,255,255,.04)}
.navitem .caret{width:8px;height:8px;opacity:.6}
.submenu{
  position:absolute;top:calc(100% + 6px);left:0;min-width:210px;
  background:var(--ink-2);border:1px solid var(--line);border-radius:11px;
  padding:.4rem;box-shadow:0 24px 50px rgba(0,0,0,.5);
  opacity:0;visibility:hidden;transform:translateY(6px);transition:.2s;
}
.navitem:hover .submenu,.navitem:focus-within .submenu{opacity:1;visibility:visible;transform:translateY(0)}
.submenu a{display:block;font-size:.8rem;padding:.5rem .7rem;border-radius:7px;color:var(--txt-dim)}
.submenu a:hover{background:rgba(255,255,255,.05);color:var(--paper)}

.lang{display:flex;align-items:center;gap:.3rem;margin-left:.4rem;border-left:1px solid var(--line);padding-left:.7rem}
.lang button{
  font:500 .72rem/1 var(--mono);color:var(--txt-dim);background:none;border:none;cursor:pointer;
  padding:.35rem .4rem;border-radius:6px;letter-spacing:.05em;transition:.2s;
}
.lang button:hover{color:var(--paper)}
.lang button.active{color:var(--ink);background:var(--gold)}

.burger{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:.5rem;cursor:pointer}
.burger span{display:block;width:20px;height:2px;background:var(--paper);margin:4px 0;transition:.3s}

/* ---------- HERO ---------- */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;padding:7rem clamp(1rem,5vw,4rem) 4rem;overflow:hidden}
#orbits{position:absolute;inset:0;width:100%;height:100%;z-index:0}
.hero-grid{position:absolute;inset:0;z-index:1;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:64px 64px;mask-image:radial-gradient(circle at 70% 40%,#000,transparent 75%);opacity:.5}
.hero-logo{position:absolute;z-index:1;right:clamp(1rem,5vw,5rem);top:50%;transform:translateY(-46%);
  width:clamp(230px,30vw,420px);margin:0;pointer-events:none;
  filter:drop-shadow(0 30px 60px rgba(0,0,0,.45));
  animation:floaty 9s ease-in-out infinite}
.hero-logo img{width:100%;display:block;border-radius:18px;
  background:radial-gradient(circle at 50% 45%,rgba(245,243,236,.92),rgba(245,243,236,.78));
  padding:10px;border:1px solid var(--line)}
@keyframes floaty{0%,100%{transform:translateY(-46%)}50%{transform:translateY(-52%)}}
.hero-inner{position:relative;z-index:2;max-width:840px}
.eyebrow{display:inline-flex;align-items:center;gap:.6rem;font:500 .72rem/1 var(--mono);letter-spacing:.22em;text-transform:uppercase;color:var(--cyan);margin-bottom:1.6rem}
.eyebrow::before{content:"";width:34px;height:1px;background:var(--cyan);opacity:.7}
.hero h1{font-family:var(--serif);font-weight:500;font-size:clamp(2.5rem,6.5vw,5.2rem);line-height:1.02;letter-spacing:-.02em;margin-bottom:1.4rem}
.hero h1 em{font-style:italic;color:var(--gold)}
.hero p.lead{font-size:clamp(1.02rem,1.6vw,1.22rem);color:var(--txt-dim);max-width:560px;margin-bottom:2.4rem}
.cta-row{display:flex;flex-wrap:wrap;gap:1rem;align-items:center}
.btn{display:inline-flex;align-items:center;gap:.55rem;font:600 .9rem/1 var(--sans);padding:.95rem 1.5rem;border-radius:50px;cursor:pointer;transition:transform .2s,box-shadow .2s;border:1px solid transparent}
.btn-pri{background:var(--gold);color:var(--ink)}
.btn-pri:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(217,164,65,.35)}
.btn-ghost{border-color:var(--line);color:var(--paper)}
.btn-ghost:hover{background:rgba(255,255,255,.05)}
.btn svg{width:15px;height:15px}

.hero-stats{display:flex;flex-wrap:wrap;gap:2.4rem;margin-top:3.4rem;padding-top:2.2rem;border-top:1px solid var(--line)}
.stat .n{font-family:var(--serif);font-size:2rem;line-height:1;color:var(--paper)}
.stat .l{font-size:.74rem;letter-spacing:.06em;color:var(--txt-dim);margin-top:.4rem;text-transform:uppercase}

/* ---------- SECTION SHELL ---------- */
.section{padding:clamp(4rem,9vw,8rem) clamp(1rem,5vw,4rem);position:relative}
.section.paper{background:var(--paper);color:var(--ink)}
.shead{max-width:680px;margin-bottom:3.2rem}
.kicker{font:500 .72rem/1 var(--mono);letter-spacing:.2em;text-transform:uppercase;color:var(--gold);display:flex;align-items:center;gap:.6rem;margin-bottom:1rem}
.kicker .idx{color:inherit;opacity:.55}
.section.paper .kicker{color:#a8761b}
.shead h2{font-family:var(--serif);font-weight:500;font-size:clamp(1.9rem,4vw,3rem);line-height:1.08;letter-spacing:-.015em}
.shead p{margin-top:1rem;color:var(--txt-dim);font-size:1.05rem}
.section.paper .shead p{color:var(--txt-dim-dark)}

/* about */
.about-body{font-size:1.08rem;max-width:780px;color:#2a3047}
.about-body p{margin-bottom:1.1rem}
.tags{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:2rem}
.tag{font:500 .8rem/1 var(--sans);padding:.55rem .9rem;border:1px solid var(--line-dark);border-radius:50px;color:#3a4263;background:#fff}

/* research lines */
.lines{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.2rem;margin-top:2rem}
.line-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:1.8rem;position:relative;overflow:hidden;transition:transform .25s,border-color .25s}
.line-card:hover{transform:translateY(-4px);border-color:rgba(217,164,65,.5)}
.line-card .wave{position:absolute;right:-30px;top:-30px;width:140px;height:140px;opacity:.12}
.line-card h3{font-family:var(--serif);font-weight:500;font-size:1.35rem;margin-bottom:.7rem}
.line-card ul{list-style:none;margin-top:1rem}
.line-card li{font-size:.9rem;color:var(--txt-dim);padding:.32rem 0;padding-left:1.2rem;position:relative}
.line-card li::before{content:"";position:absolute;left:0;top:.7em;width:6px;height:6px;border-radius:50%;background:var(--cyan)}

/* programs */
.progs{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.4rem;margin-top:2rem}
.prog{border:1px solid var(--line-dark);border-radius:18px;padding:2rem;background:#fff;display:flex;flex-direction:column}
.prog .lvl{font:500 .7rem/1 var(--mono);letter-spacing:.18em;text-transform:uppercase;color:#a8761b;margin-bottom:.8rem}
.prog h3{font-family:var(--serif);font-weight:500;font-size:1.7rem;margin-bottom:.6rem}
.prog p{color:var(--txt-dim-dark);font-size:.96rem;flex:1}
.prog .meta{display:flex;gap:1.5rem;margin-top:1.4rem;padding-top:1.2rem;border-top:1px solid var(--line-dark)}
.prog .meta div span{display:block}
.prog .meta .mv{font-family:var(--serif);font-size:1.3rem;color:var(--ink)}
.prog .meta .ml{font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;color:var(--txt-dim-dark)}

/* staff */
.staff{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.2rem;margin-top:2rem}
.person{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:1.5rem;transition:border-color .25s}
.person:hover{border-color:rgba(111,214,224,.5)}
.person .av{width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--gold),var(--cyan));display:flex;align-items:center;justify-content:center;font-family:var(--serif);color:var(--ink);font-size:1.1rem;margin-bottom:1rem}
.person h4{font-family:var(--serif);font-weight:500;font-size:1.12rem}
.person .role{font-size:.78rem;color:var(--cyan);margin:.25rem 0 .7rem;letter-spacing:.04em}
.person a{font-size:.82rem;color:var(--txt-dim);word-break:break-all}
.person a:hover{color:var(--paper)}

/* quicklinks */
.qgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin-top:2rem}
.qlink{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:1.3rem 1.4rem;border:1px solid var(--line);border-radius:13px;background:var(--panel);transition:.25s}
.qlink:hover{background:var(--ink-2);border-color:rgba(217,164,65,.5);transform:translateX(4px)}
.qlink span{font-weight:500;font-size:.98rem}
.qlink svg{width:18px;height:18px;color:var(--gold);flex:none}

/* CTA band */
.band{background:linear-gradient(120deg,var(--ink-2),var(--panel));border:1px solid var(--line);border-radius:24px;padding:clamp(2.2rem,5vw,3.6rem);text-align:center;margin:0 clamp(1rem,5vw,4rem);position:relative;overflow:hidden}
.band h2{font-family:var(--serif);font-weight:500;font-size:clamp(1.7rem,4vw,2.6rem);margin-bottom:1rem}
.band p{color:var(--txt-dim);max-width:480px;margin:0 auto 1.8rem}

/* footer */
footer{background:#070b1c;border-top:1px solid var(--line);padding:clamp(3rem,6vw,4.5rem) clamp(1rem,5vw,4rem) 2rem}
.fgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:2.5rem;max-width:1100px}
.fgrid h5{font:500 .72rem/1 var(--mono);letter-spacing:.18em;text-transform:uppercase;color:var(--gold);margin-bottom:1.1rem}
.fgrid p,.fgrid a{font-size:.88rem;color:var(--txt-dim);display:block;margin-bottom:.5rem}
.fgrid a:hover{color:var(--paper)}
.fbrand b{font-family:var(--serif);font-size:1.3rem;display:block;margin-bottom:.5rem}
.fbrand .flogo{width:64px;height:64px;object-fit:contain;background:#f5f3ec;border-radius:10px;padding:5px;margin-bottom:.9rem}
.fbot{margin-top:3rem;padding-top:1.5rem;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:1rem;justify-content:space-between;font-size:.78rem;color:var(--txt-dim)}

/* reveal */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s,transform .7s}
.reveal.in{opacity:1;transform:none}

/* mobile */
@media(max-width:1080px){
  .topbar nav{position:fixed;top:0;right:0;height:100vh;width:min(86vw,360px);background:var(--ink-2);
    flex-direction:column;align-items:stretch;justify-content:flex-start;gap:0;padding:5rem 1rem 2rem;
    border-left:1px solid var(--line);transform:translateX(100%);transition:transform .35s;overflow-y:auto}
  .topbar nav.open{transform:none}
  .navitem>a,.navitem>button{width:100%;padding:.85rem .8rem;justify-content:space-between;font-size:.95rem}
  .submenu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:none;background:transparent;
    padding:0 0 .5rem .8rem;min-width:0;display:none}
  .navitem.open-sub .submenu{display:block}
  .lang{margin:1rem 0 0;border-left:none;border-top:1px solid var(--line);padding:1rem 0 0;justify-content:center}
  .burger{display:block;z-index:120}
}
@media(max-width:680px){
  .fgrid{grid-template-columns:1fr;gap:2rem}
}
@media(max-width:980px){
  .hero-logo{position:relative;right:auto;top:auto;transform:none;margin:0 0 2rem;width:min(260px,60vw);animation:none}
  .hero{flex-direction:column;align-items:flex-start;padding-top:6rem}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
  .hero-logo{transform:translateY(-46%)}
}

/* ===== páginas internas ===== */
.cards-col{display:flex;flex-direction:column;gap:1.2rem;max-width:860px}
.post,.thesis{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:1.8rem 2rem;transition:border-color .25s}
.post:hover,.thesis:hover{border-color:rgba(217,164,65,.45)}
.post-date,.year{font:500 .74rem/1 var(--mono);letter-spacing:.08em;color:var(--cyan)}
.post h3,.thesis h3{font-family:var(--serif);font-weight:500;font-size:1.4rem;margin:.6rem 0 .5rem;line-height:1.2}
.post p,.thesis .abstract{color:var(--txt-dim);font-size:.95rem;margin-bottom:1rem}
.post-body{color:var(--txt-dim);font-size:.95rem;margin:.6rem 0 1.1rem}
.post-body p{margin-bottom:.8rem}
.thesis-meta{display:flex;align-items:center;gap:.8rem;margin-bottom:.2rem}
.badge{font:500 .68rem/1 var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--gold);
  border:1px solid rgba(217,164,65,.4);border-radius:50px;padding:.35rem .7rem}
.byline{font-size:.9rem;color:var(--txt-dim);margin-bottom:.8rem}
.byline strong{color:var(--paper);font-weight:600}
.filterbar{display:flex;flex-wrap:wrap;gap:.6rem;margin-bottom:2rem}
.chip{font:500 .82rem/1 var(--sans);padding:.55rem 1rem;border:1px solid var(--line);border-radius:50px;color:var(--txt-dim);transition:.2s}
.chip:hover{color:var(--paper);border-color:rgba(245,243,236,.3)}
.chip.on{background:var(--gold);color:var(--ink);border-color:var(--gold)}
.section.paper .post,.section.paper .thesis{background:#fff;border-color:var(--line-dark)}
.section.paper .post p,.section.paper .thesis .abstract,.section.paper .post-body{color:var(--txt-dim-dark)}