/* =========================================================
   STELLAR OKAS — The Campus Portfolio
   Institutional: ice white, slate, petrol teal, wide Archivo
   caps, triptych building cards, generous air, square edges.
   ========================================================= */

:root{
  --ice:#f2f4f6;
  --ice-2:#e8ecef;
  --white:#ffffff;
  --slate:#232a31;
  --slate-soft:#5b6670;
  --line:rgba(35,42,49,.16);
  --line-soft:rgba(35,42,49,.09);
  --teal:#1d4e89;
  --teal-soft:rgba(29,78,137,.1);
  --wide:'Archivo', system-ui, sans-serif;
  --sans:'Archivo', system-ui, sans-serif;
  --ease:cubic-bezier(.25,.9,.3,1);
  --maxw:1180px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);font-weight:400;
  background:var(--ice);color:var(--slate);
  line-height:1.7;font-size:16.5px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
::selection{background:var(--teal);color:#fff}

.container{max-width:var(--maxw);margin:0 auto;padding:0 32px;width:100%}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:15px 28px;border:1px solid var(--teal);
  background:var(--teal);color:#fff;
  font-family:var(--wide);font-stretch:125%;font-weight:700;
  font-size:.76rem;letter-spacing:.12em;text-transform:uppercase;
  cursor:pointer;transition:.3s var(--ease);
}
.btn:hover{background:#153a66;border-color:#153a66}
.btn--line{background:transparent;color:var(--slate);border-color:var(--line)}
.btn--line:hover{border-color:var(--teal);color:var(--teal);background:transparent}
.btn--full{width:100%}

/* ---------- Preloader ---------- */
.preloader{
  position:fixed;inset:0;background:var(--ice);z-index:9999;
  display:flex;align-items:center;justify-content:center;
  transition:opacity .7s var(--ease),visibility .7s;
}
.preloader.done{opacity:0;visibility:hidden}
.preloader__mark{
  font-family:var(--wide);font-stretch:125%;font-weight:800;
  font-size:clamp(1.5rem,4.5vw,2.6rem);letter-spacing:.3em;color:var(--teal);
}

.scroll-progress{position:fixed;top:0;left:0;height:3px;width:0;background:var(--teal);z-index:1200}

/* ---------- Top bar ---------- */
.nav{
  position:fixed;top:0;left:0;width:100%;z-index:1000;
  background:rgba(242,244,246,.94);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line-soft);
  transition:border-color .3s;
}
.nav.scrolled{border-bottom-color:var(--line)}
.nav__inner{
  max-width:var(--maxw);margin:0 auto;padding:20px 32px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.nav__brand{
  font-family:var(--wide);font-stretch:125%;font-weight:500;letter-spacing:.22em;font-size:.95rem;
}
.nav__brand b{font-weight:800;color:var(--teal)}
.nav__links{display:flex;align-items:center;gap:28px}
.nav__link{
  font-size:.74rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--slate-soft);transition:color .3s;position:relative;
}
.nav__link::after{
  content:"";position:absolute;left:0;bottom:-6px;height:2px;width:0;
  background:var(--teal);transition:width .3s var(--ease);
}
.nav__link:hover{color:var(--slate)}
.nav__link:hover::after{width:100%}
.nav__toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.nav__toggle span{width:22px;height:2px;background:var(--slate);transition:.4s var(--ease)}

/* ---------- Hero ---------- */
.hero{padding:140px 0 80px}
.hero__kicker{
  font-family:var(--wide);font-stretch:125%;font-weight:600;
  font-size:.68rem;letter-spacing:.3em;color:var(--teal);
  margin-bottom:36px;
}
.hero__grid{display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(36px,4.5vw,72px);align-items:start}
.hero__title{
  font-family:var(--wide);font-stretch:125%;font-weight:800;
  font-size:clamp(2.4rem,4.8vw,4.1rem);line-height:1.04;letter-spacing:-.01em;
  text-transform:uppercase;margin-bottom:22px;
}
.hero__line{display:block}
.hero__title .char{display:inline-block;opacity:0;transform:translateY(20px);
  transition:opacity .5s var(--ease),transform .5s var(--ease)}
.hero__title .char.in{opacity:1;transform:none}
.hero__title .word{display:inline-block;white-space:nowrap}
.hero__deck{max-width:56ch;color:var(--slate-soft);margin-bottom:34px}

/* ---------- Triptych ---------- */
.triptych{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px}
.trip{
  position:relative;display:block;background:var(--white);
  border:1px solid var(--line);padding:10px 10px 14px;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s;
}
.trip:hover{transform:translateY(-5px);box-shadow:0 24px 44px -26px rgba(35,42,49,.45);border-color:var(--teal)}
.trip img{width:100%;aspect-ratio:4/3;object-fit:cover;margin-bottom:12px}
.trip__tag{
  position:absolute;top:18px;left:18px;
  font-family:var(--wide);font-stretch:125%;font-weight:700;font-size:.58rem;letter-spacing:.18em;
  background:var(--teal);color:#fff;padding:4px 8px;
}
.trip__name{
  display:block;font-family:var(--wide);font-stretch:125%;font-weight:800;
  font-size:1.5rem;line-height:1;margin:0 4px 4px;
}
.trip__fact{display:block;font-size:.72rem;color:var(--slate-soft);margin:0 4px;letter-spacing:.02em}

/* ---------- Hero form panel ---------- */
.panel{background:var(--white);border:1px solid var(--line);padding:32px 28px 22px;
  box-shadow:0 30px 60px -40px rgba(35,42,49,.4)}
.panel--hero{border-top:4px solid var(--teal)}
.panel__flag{
  font-family:var(--wide);font-stretch:125%;font-weight:700;
  font-size:.64rem;letter-spacing:.26em;text-transform:uppercase;color:var(--teal);margin-bottom:4px;
}
.panel__head{font-family:var(--wide);font-stretch:125%;font-weight:800;font-size:1.5rem;margin-bottom:20px}
.field{margin-bottom:16px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field label{
  display:block;font-size:.66rem;font-weight:600;letter-spacing:.16em;
  text-transform:uppercase;color:var(--slate-soft);margin-bottom:6px;
}
.field input,.field select{
  width:100%;padding:12px 13px;background:var(--ice);
  border:1px solid var(--line);color:var(--slate);
  font-family:var(--sans);font-size:.95rem;
  transition:border-color .3s,background .3s;border-radius:0;
}
.field input::placeholder{color:rgba(35,42,49,.35)}
.field input:focus,.field select:focus{outline:none;border-color:var(--teal);background:var(--white)}
.field select{appearance:none;cursor:pointer;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='11' height='7' viewBox='0 0 11 7'%3E%3Cpath fill='%231d4e89' d='M5.5 7 0 0h11z'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 13px center}
.field--hidden{display:none}
.contact__note{margin-top:12px;font-size:.85rem;color:var(--slate-soft);text-align:center}
.contact__note.ok{color:var(--teal)}

/* ---------- Sections ---------- */
.section{padding:96px 0}
.section--tint{background:var(--white);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
.section__head{margin-bottom:48px}
.section__head h2{
  font-family:var(--wide);font-stretch:125%;font-weight:800;text-transform:uppercase;
  font-size:clamp(1.6rem,3.2vw,2.4rem);letter-spacing:-.005em;
  border-bottom:3px solid var(--teal);display:inline-block;padding-bottom:10px;
}

/* ---------- Stats ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;margin-bottom:48px}
.stat{background:var(--white);border:1px solid var(--line);padding:24px 22px;border-top:4px solid var(--teal)}
.stat__num{
  font-family:var(--wide);font-stretch:125%;font-weight:800;
  font-size:clamp(1.7rem,3vw,2.5rem);display:block;line-height:1.1;margin-bottom:8px;
}
.stat p{font-size:.82rem;color:var(--slate-soft);line-height:1.6}
.campus__prose{max-width:72ch;font-size:1.15rem;line-height:1.85;color:var(--slate-soft)}

/* ---------- Building cards ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.card{background:var(--ice);border:1px solid var(--line);padding:28px 26px;display:flex;flex-direction:column;gap:18px}
.section--tint .card{background:var(--ice)}
.card__head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.card__head h3{font-family:var(--wide);font-stretch:125%;font-weight:800;font-size:1.2rem}
.card__badge{
  font-family:var(--wide);font-stretch:125%;font-weight:700;font-size:.58rem;letter-spacing:.18em;
  background:var(--teal);color:#fff;padding:4px 8px;white-space:nowrap;
}
.card ul{list-style:none;flex:1;display:flex;flex-direction:column;gap:9px}
.card li{
  font-size:.9rem;color:var(--slate-soft);padding-left:18px;position:relative;line-height:1.6;
}
.card li::before{content:"";position:absolute;left:0;top:10px;width:8px;height:2px;background:var(--teal)}
.card .btn{align-self:flex-start}

/* ---------- Mandate ---------- */
.mandate__lede{
  font-size:1.25rem;line-height:1.8;max-width:74ch;margin-bottom:44px;
}
.mandate__cols{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.mandate__cols h4{
  font-family:var(--wide);font-stretch:125%;font-weight:700;text-transform:uppercase;
  font-size:.82rem;letter-spacing:.12em;color:var(--teal);margin-bottom:10px;
}
.mandate__cols p{font-size:.92rem;color:var(--slate-soft)}

/* ---------- Location ---------- */
.loc{background:var(--ice);border:1px solid var(--line);margin-bottom:32px}
.loc__row{
  display:flex;align-items:baseline;justify-content:space-between;gap:18px;
  padding:15px 20px;border-bottom:1px solid var(--line-soft);
}
.loc__row:last-child{border-bottom:none}
.loc__row span{font-size:.8rem;letter-spacing:.08em;text-transform:uppercase;color:var(--slate-soft)}
.loc__row b{font-weight:600}

/* ---------- Contact ---------- */
.contactrow{display:flex;justify-content:space-between;align-items:flex-end;gap:40px;flex-wrap:wrap}
.contactrow__big{font-family:var(--wide);font-stretch:125%;font-weight:800;font-size:clamp(1.4rem,3vw,2.1rem);line-height:1.5}
.contactrow__big a:hover{color:var(--teal)}
.contactrow__sub{font-size:.88rem;color:var(--slate-soft);margin-top:8px;max-width:46ch}
.contactrow__cta{display:flex;flex-direction:column;gap:12px}

/* ---------- Footer ---------- */
.footer{background:var(--slate);color:rgba(255,255,255,.85);padding:48px 0 38px}
.footer__brand{font-family:var(--wide);font-stretch:125%;font-weight:500;letter-spacing:.22em;margin-bottom:10px;color:#fff}
.footer__brand b{font-weight:800;color:#8fb8e8}
.footer__meta{font-size:.82rem;color:rgba(255,255,255,.6);margin-bottom:14px}
.footer__meta a{color:rgba(255,255,255,.85);border-bottom:1px solid rgba(255,255,255,.3)}
.footer__legal{font-size:.74rem;color:rgba(255,255,255,.5);line-height:1.8;max-width:760px}
.footer__legal a{border-bottom:1px solid rgba(255,255,255,.3)}

/* ---------- To top ---------- */
.to-top{
  position:fixed;bottom:96px;right:26px;width:42px;height:42px;
  border:1px solid var(--line);background:var(--white);color:var(--slate);
  display:flex;align-items:center;justify-content:center;font-size:1rem;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:.35s var(--ease);z-index:800;
}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top:hover{border-color:var(--teal);color:var(--teal)}

/* ---------- Chat ---------- */
.chat{position:fixed;bottom:26px;right:26px;z-index:900}
.chat__fab{
  display:inline-flex;align-items:center;padding:14px 20px;cursor:pointer;
  background:var(--teal);color:#fff;border:none;
  font-family:var(--wide);font-stretch:125%;font-weight:700;
  font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;
  box-shadow:0 16px 36px -14px rgba(29,78,137,.6);
  transition:.3s var(--ease);
}
.chat__fab:hover{background:#153a66;transform:translateY(-2px)}
.chat.open .chat__fab{background:var(--slate)}
.chat__panel{
  position:absolute;bottom:calc(100% + 14px);right:0;width:370px;max-width:calc(100vw - 40px);
  background:var(--white);color:var(--slate);
  border:1px solid var(--line);border-top:4px solid var(--teal);
  padding:24px 22px 16px;
  box-shadow:0 40px 80px -30px rgba(35,42,49,.5);
  opacity:0;visibility:hidden;transform:translateY(8px);transform-origin:bottom right;
  transition:opacity .3s var(--ease),transform .35s var(--ease),visibility .35s;
}
.chat.open .chat__panel{opacity:1;visibility:visible;transform:none}
.chat__close{
  position:absolute;top:8px;right:12px;background:none;border:none;
  font-size:1.6rem;line-height:1;color:var(--slate-soft);cursor:pointer;padding:4px 8px;
}
.chat__close:hover{color:var(--teal)}
.chat__flag{
  font-family:var(--wide);font-stretch:125%;font-weight:700;
  font-size:.62rem;letter-spacing:.24em;text-transform:uppercase;color:var(--teal);margin-bottom:4px;
}
.chat__panel h3{font-family:var(--wide);font-stretch:125%;font-weight:800;font-size:1.3rem;margin-bottom:12px}
.chat__msgs{height:260px;overflow-y:auto;display:flex;flex-direction:column;gap:10px;
  padding:12px 2px 4px;margin-bottom:12px;border-top:1px solid var(--line-soft)}
.chat__msg{max-width:88%;padding:10px 14px;font-size:.9rem;line-height:1.55;
  white-space:pre-wrap;overflow-wrap:break-word}
.chat__msg--assistant{align-self:flex-start;background:var(--ice);border:1px solid var(--line-soft)}
.chat__msg--user{align-self:flex-end;background:var(--teal);color:#fff}
.chat__msg--typing{color:var(--slate-soft);letter-spacing:.2em}
.chat__form{display:flex;gap:8px}
.chat__form input{flex:1;padding:12px 13px;font-size:.92rem;font-family:var(--sans);
  background:var(--ice);border:1px solid var(--line);color:var(--slate)}
.chat__form input::placeholder{color:rgba(35,42,49,.35)}
.chat__form input:focus{outline:none;border-color:var(--teal)}
.chat__send{width:44px;border:none;background:var(--teal);color:#fff;
  cursor:pointer;font-size:1.05rem;transition:.3s var(--ease)}
.chat__send:hover{background:#153a66}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .85s var(--ease),transform .85s var(--ease)}
.reveal.in{opacity:1;transform:none}
.fade-in{opacity:0;transition:opacity 1s var(--ease)}
.fade-in.show{opacity:1}

/* ---------- Responsive ---------- */
@media(max-width:1000px){
  .nav__toggle{display:flex;z-index:1002}
  .nav__toggle.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
  .nav__toggle.active span:nth-child(2){opacity:0}
  .nav__toggle.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}
  .nav__links{
    position:fixed;inset:0 0 0 auto;width:80%;max-width:320px;height:100vh;
    background:var(--white);border-left:1px solid var(--line);
    flex-direction:column;justify-content:center;gap:30px;align-items:flex-start;
    padding:0 40px;transform:translateX(100%);transition:transform .5s var(--ease);z-index:1001;
  }
  .nav__links.open{transform:translateX(0)}
  .nav__link{font-size:.95rem}
  .hero__grid{grid-template-columns:1fr;gap:44px}
  .stats{grid-template-columns:repeat(2,1fr)}
  .cards{grid-template-columns:1fr}
  .mandate__cols{grid-template-columns:1fr}
}
@media(max-width:640px){
  .container{padding:0 20px}
  .hero{padding:120px 0 60px}
  .section{padding:64px 0}
  .triptych{grid-template-columns:1fr}
  .trip img{aspect-ratio:16/9}
  .field-row{grid-template-columns:1fr}
  .field input,.field select{font-size:16px}
  .stats{grid-template-columns:1fr 1fr;gap:14px}
  .loc__row{flex-direction:column;gap:2px}
  .contactrow{flex-direction:column;align-items:flex-start}
}