:root{
  --bg:#f7f5f0;
  --panel:#ffffff;
  --ink:#14202e;
  --ink-soft:#4a5a6a;
  --ink-faint:#8a97a4;
  --line:#e3ded4;
  --navy:#12263f;
  --navy-2:#1c3a5e;
  --accent:#b4402f;
  --accent-soft:#f6e8e4;
  --radius:16px;
  --shadow:0 1px 2px rgba(18,38,63,.05), 0 8px 24px rgba(18,38,63,.06);
  --serif:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,serif;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit}
button{font:inherit}

.wrap{max-width:1080px;margin:0 auto;padding:0 24px}

/* ---- topo ---- */
header.site{
  background:var(--navy);
  color:#fff;
  border-bottom:4px solid var(--accent);
}
.site-inner{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:24px 0;
}
.brand{display:flex;align-items:center;gap:16px;text-decoration:none;color:#fff}
.mark{
  width:46px;height:46px;border-radius:12px;flex:0 0 auto;
  background:linear-gradient(150deg,#2b507c,#0f1e31);
  border:1px solid rgba(255,255,255,.18);
  display:grid;place-items:center;
  font-family:var(--serif);font-size:22px;letter-spacing:.5px;
}
.brand h1{
  font-family:var(--serif);font-weight:600;font-size:22px;line-height:1.15;margin:0;letter-spacing:.2px;
}
.brand small{
  display:block;font-family:var(--sans);font-size:12.5px;font-weight:500;
  color:#a9bcd0;letter-spacing:.08em;text-transform:uppercase;margin-top:3px;
}
.proto{
  font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:#e8c7bf;
  border:1px solid rgba(232,199,191,.45);border-radius:999px;padding:5px 11px;white-space:nowrap;
}

/* ---- hero ---- */
.hero{padding:44px 0 10px;max-width:820px}
.kicker{
  color:var(--accent);font-size:12px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;
}
.hero h2,.page-head h2{
  font-family:var(--serif);font-weight:600;font-size:clamp(28px,4.5vw,44px);
  line-height:1.1;margin:10px 0 12px;letter-spacing:-.01em;
}
.hero p{margin:0;color:var(--ink-soft);font-size:17px;max-width:64ch}

/* ---- migalhas ---- */
.crumbs{
  display:flex;align-items:center;flex-wrap:wrap;gap:6px;
  padding:26px 0 0;font-size:13.5px;color:var(--ink-soft);
}
.crumbs a{color:var(--ink-soft);text-decoration:none;border-bottom:1px solid transparent}
.crumbs a:hover{border-color:var(--ink-faint)}
.crumbs .sep{opacity:.55}
.crumbs .here{color:var(--ink);font-weight:600}

/* ---- cabeçalho das seções ---- */
.section-head{
  display:flex;align-items:baseline;justify-content:space-between;gap:12px;
  margin:34px 0 14px;
}
.section-head h3{
  margin:0;font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--ink-faint);font-weight:700;
}
.section-head .count{font-size:13px;color:var(--ink-faint)}

/* ---- home: disciplinas ---- */
.disc-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;
  padding-bottom:20px;
}
.disc-card{
  position:relative;display:flex;flex-direction:column;justify-content:space-between;gap:22px;
  min-height:172px;padding:22px;border-radius:var(--radius);
  background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow);
  text-decoration:none;transition:transform .15s,box-shadow .15s,border-color .15s;
}
.disc-card:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(18,38,63,.1);border-color:#d6cec0}
.disc-card .sigla{
  font-size:11px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--accent);background:var(--accent-soft);border-radius:999px;padding:4px 10px;align-self:flex-start;
}
.disc-card h4{
  font-family:var(--serif);font-weight:600;font-size:25px;line-height:1.15;margin:0 0 6px;
}
.disc-card .meta{font-size:13.5px;color:var(--ink-faint)}
.disc-card .go{
  position:absolute;right:20px;top:50%;transform:translateY(-50%);width:34px;height:34px;border-radius:50%;
  display:grid;place-items:center;background:#f4f1ea;color:var(--navy);
}
.disc-card:hover .go{background:var(--navy);color:#fff}

/* ---- disciplina: semestres ---- */
.page-head{padding:22px 0 0;max-width:820px}
.page-head .sub{margin:0;color:var(--ink-soft);font-size:16px}
.sem-list{display:flex;flex-direction:column;gap:10px;padding-bottom:24px}
.sem-card{
  display:flex;align-items:center;gap:18px;padding:18px 20px;border-radius:14px;
  background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow);
  text-decoration:none;transition:transform .14s,box-shadow .14s,border-color .14s;
}
.sem-card:hover{transform:translateX(3px);border-color:#d6cec0;box-shadow:0 8px 22px rgba(18,38,63,.09)}
.sem-card .ano{
  font-family:var(--serif);font-size:22px;font-weight:600;min-width:96px;letter-spacing:-.01em;
}
.sem-card .meta{font-size:13.5px;color:var(--ink-faint)}
.sem-card .arrow{margin-left:auto;color:var(--ink-faint);flex:0 0 auto}
.sem-card:hover .arrow{color:var(--accent)}

/* ---- semestre: grupos ---- */
.toolbar{
  display:flex;align-items:center;gap:12px;margin:20px 0 16px;flex-wrap:wrap;
}
.toolbar .count{margin-left:auto;white-space:nowrap}
.search{
  display:flex;align-items:center;gap:8px;flex:1;min-width:200px;
  background:#fff;border:1px solid var(--line);border-radius:11px;padding:9px 12px;
  box-shadow:0 1px 2px rgba(18,38,63,.04);
}
.search svg{flex:0 0 auto;opacity:.45}
.search input{
  border:0;background:transparent;outline:0;font:inherit;font-size:14px;color:var(--ink);width:100%;
}
.groups{display:flex;flex-direction:column;gap:12px;padding-bottom:24px}
.group{
  background:var(--panel);border:1px solid var(--line);border-radius:14px;
  box-shadow:var(--shadow);padding:18px 20px;
  display:grid;grid-template-columns:minmax(0,1fr) auto;gap:16px;align-items:center;
}
.group .no{
  font-size:11px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);
}
.group h4{
  font-family:var(--serif);font-weight:600;font-size:19px;line-height:1.25;margin:3px 0 4px;
}
.group .authors{font-size:13.5px;color:var(--ink-soft);margin:0}
.actions{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.btn{
  display:inline-flex;align-items:center;gap:7px;
  padding:9px 14px;border-radius:9px;font-size:13.5px;font-weight:600;
  text-decoration:none;border:1px solid var(--line);background:#fff;color:var(--navy);
  transition:transform .12s, box-shadow .12s, background .12s;white-space:nowrap;
}
.btn:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(18,38,63,.1)}
.btn svg{flex:0 0 auto}
.btn.pdf{background:var(--navy);border-color:var(--navy);color:#fff}
.btn.yt{background:#fff;color:var(--accent);border-color:#ecd2cb}
.btn.yt:hover{background:var(--accent-soft)}
.btn.off{background:#f1eee8;border-color:#ddd6ca;color:#8a97a4;border-style:dashed;cursor:not-allowed;pointer-events:none}

/* ---- estados vazios ---- */
.empty{
  background:var(--panel);border:1px dashed #d8d1c5;border-radius:14px;
  padding:38px 24px;text-align:center;color:var(--ink-faint);font-size:14.5px;line-height:1.6;
}
.empty strong{display:block;color:var(--ink-soft);font-size:16px;margin-bottom:4px}
.empty a{color:var(--accent);font-weight:600;text-decoration:none}
.empty a:hover{text-decoration:underline}

/* ---- rodapé ---- */
footer.site{
  border-top:1px solid var(--line);
  margin-top:24px;padding:26px 0 40px;color:var(--ink-faint);font-size:13px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
footer.site strong{color:var(--ink-soft);font-weight:600}

/* ---- responsivo ---- */
@media (max-width:640px){
  .wrap{padding:0 16px}
  .site-inner{padding:18px 0;align-items:flex-start}
  .proto{display:none}
  .hero{padding-top:30px}
  .hero h2,.page-head h2{font-size:30px}
  .group{grid-template-columns:1fr;gap:12px}
  .actions{justify-content:flex-start}
  .sem-card .ano{min-width:74px;font-size:20px}
  .toolbar{gap:8px}
  .search{flex:1 1 100%}
  .toolbar .count{margin-left:0}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important}
}