/*
Theme Name: Twin Studio
Theme URI: https://twinstudio.example
Author: Twin Studio
Author URI: https://twinstudio.example
Description: A refined multi-page theme for Twin Studio — a multidisciplinary landscape architecture, urban planning, GIS and drone-survey practice. Royal navy and gold, Apple-style typography.
Version: 1.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: twin-studio
*/

/* ============================================================
   Design tokens
   ============================================================ */
:root{
  --navy-deep:#0B1B3A;      /* deep space sky */
  --navy:#12295A;
  --royal:#1C4B8F;          /* from the logo mark */
  --royal-bright:#2E6CC4;
  --gold:#C9A24B;
  --gold-soft:#D9BE7E;
  --paper:#FAF9F6;
  --paper-2:#F1EFE8;
  --ink:#1A2230;
  --ink-soft:#4A5568;
  --line:rgba(11,27,58,.12);
  --line-gold:rgba(201,162,75,.35);

  --font-sans:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Inter",
    "Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --font-display:-apple-system,BlinkMacSystemFont,"SF Pro Display","Inter","Segoe UI",sans-serif;

  --wrap:1200px;
  --gutter:clamp(20px,5vw,64px);
  --radius:14px;
  --shadow:0 18px 50px -24px rgba(11,27,58,.45);
  --shadow-soft:0 10px 30px -18px rgba(11,27,58,.35);
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  color:var(--ink);
  background:var(--paper);
  font-size:17px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:var(--royal);text-decoration:none;transition:color .25s var(--ease)}
a:hover{color:var(--gold)}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--navy-deep);letter-spacing:-.02em;line-height:1.08;font-weight:700;margin:0 0 .5em}
p{margin:0 0 1.1em}
.wrap{max-width:var(--wrap);margin:0 auto;padding-inline:var(--gutter)}

/* Selection */
::selection{background:var(--gold);color:var(--navy-deep)}

/* ============================================================
   Buttons
   ============================================================ */
.btn{
  display:inline-flex;align-items:center;gap:.55em;
  font-weight:600;font-size:.98rem;letter-spacing:.01em;
  padding:.85em 1.6em;border-radius:100px;
  border:1.5px solid transparent;cursor:pointer;
  transition:transform .25s var(--ease),background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease);
}
.btn--gold{background:var(--gold);color:var(--navy-deep)}
.btn--gold:hover{background:var(--gold-soft);color:var(--navy-deep);transform:translateY(-2px)}
.btn--navy{background:var(--navy-deep);color:#fff}
.btn--navy:hover{background:var(--royal);color:#fff;transform:translateY(-2px)}
.btn--ghost{border-color:rgba(255,255,255,.5);color:#fff}
.btn--ghost:hover{border-color:var(--gold);color:var(--gold);transform:translateY(-2px)}
.btn--outline{border-color:var(--navy);color:var(--navy-deep)}
.btn--outline:hover{border-color:var(--gold);color:var(--gold);transform:translateY(-2px)}

/* ============================================================
   Eyebrow / section heads
   ============================================================ */
.eyebrow{
  font-size:.78rem;font-weight:700;letter-spacing:.22em;text-transform:uppercase;
  color:var(--royal);display:inline-flex;align-items:center;gap:.7em;margin-bottom:1rem;
}
.eyebrow::before{content:"";width:26px;height:1.5px;background:var(--gold)}
.section{padding:clamp(64px,9vw,120px) 0}
.section--tint{background:var(--paper-2)}
.section--navy{background:var(--navy-deep);color:#fff}
.section--navy h1,.section--navy h2,.section--navy h3{color:#fff}
.section-head{max-width:640px;margin-bottom:clamp(36px,5vw,60px)}
.section-head.center{margin-inline:auto;text-align:center}
.section-head h2{font-size:clamp(1.9rem,3.6vw,2.9rem)}
.section-head p{color:var(--ink-soft);font-size:1.08rem}
.section--navy .section-head p{color:rgba(255,255,255,.72)}

/* ============================================================
   Header / nav
   ============================================================ */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(250,249,246,.82);
  backdrop-filter:saturate(180%) blur(18px);
  -webkit-backdrop-filter:saturate(180%) blur(18px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .3s var(--ease);
}
.site-header.scrolled{box-shadow:0 8px 30px -20px rgba(11,27,58,.4)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand{display:flex;align-items:center;gap:.6em}
.brand img{height:44px;width:auto}
.nav-menu{display:flex;align-items:center;gap:2rem;list-style:none;margin:0;padding:0}
.nav-menu a{
  color:var(--navy-deep);font-weight:500;font-size:.98rem;position:relative;padding:.3em 0;
}
.nav-menu a::after{
  content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--gold);
  transition:width .3s var(--ease);
}
.nav-menu a:hover::after,.nav-menu .current-menu-item>a::after{width:100%}
.nav-menu a:hover{color:var(--navy-deep)}
.nav-cta{margin-left:.5rem}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px;width:44px;height:44px}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--navy-deep);margin:5px auto;transition:.3s var(--ease)}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ============================================================
   Hero
   ============================================================ */
.hero{position:relative;min-height:clamp(560px,86vh,860px);display:flex;align-items:flex-end;overflow:hidden}
.hero__media{position:absolute;inset:0;z-index:0}
.hero__media img{width:100%;height:100%;object-fit:cover;transform:scale(1.08);animation:heroZoom 9s var(--ease) forwards}
@keyframes heroZoom{to{transform:scale(1)}}
.hero__media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,27,58,.35) 0%,rgba(11,27,58,.15) 40%,rgba(11,27,58,.88) 100%);
}
.hero__inner{position:relative;z-index:2;color:#fff;padding-bottom:clamp(48px,8vw,90px);width:100%}
.hero__eyebrow{
  font-size:.8rem;font-weight:700;letter-spacing:.24em;text-transform:uppercase;color:var(--gold-soft);
  margin-bottom:1.2rem;display:block;
}
.hero h1{
  color:#fff;font-size:clamp(2.5rem,6.2vw,5rem);line-height:1.02;max-width:15ch;
  text-shadow:0 2px 30px rgba(0,0,0,.3);
}
.hero h1 em{font-style:normal;color:var(--gold-soft)}
.hero__sub{font-size:clamp(1.05rem,1.6vw,1.3rem);color:rgba(255,255,255,.85);max-width:52ch;margin:1.4rem 0 2rem}
.hero__actions{display:flex;gap:1rem;flex-wrap:wrap}
.hero__disciplines{
  display:flex;flex-wrap:wrap;gap:.6rem 1.6rem;margin-top:2.6rem;
  border-top:1px solid rgba(255,255,255,.2);padding-top:1.4rem;
}
.hero__disciplines span{
  font-size:.82rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:rgba(255,255,255,.78);
}

/* ============================================================
   Reveal on scroll
   ============================================================ */
.reveal{opacity:0;transform:translateY(28px)}
.js .reveal{transition:opacity .8s var(--ease),transform .8s var(--ease)}
.js .reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}

/* ============================================================
   Stat strip
   ============================================================ */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.stat{background:var(--paper);padding:2rem 1.5rem;text-align:center}
.stat__num{font-family:var(--font-display);font-size:clamp(2.2rem,4vw,3.2rem);font-weight:700;color:var(--royal);line-height:1}
.stat__num span{color:var(--gold)}
.stat__label{font-size:.86rem;color:var(--ink-soft);margin-top:.5rem;letter-spacing:.02em}

/* ============================================================
   Disciplines grid
   ============================================================ */
.disc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.4rem}
.disc-card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:2rem 1.8rem;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease);
}
.disc-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-soft);border-color:var(--line-gold)}
.disc-card__icon{width:46px;height:46px;color:var(--royal);margin-bottom:1.1rem}
.disc-card h3{font-size:1.22rem;margin-bottom:.4rem}
.disc-card p{color:var(--ink-soft);font-size:.98rem;margin:0}

/* ============================================================
   Project gallery
   ============================================================ */
.proj-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:1.2rem}
.proj{
  position:relative;border-radius:var(--radius);overflow:hidden;cursor:pointer;
  min-height:260px;background:var(--navy);
}
.proj img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;transition:transform .7s var(--ease)}
.proj:hover img{transform:scale(1.06)}
.proj::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,rgba(11,27,58,.85));z-index:1}
.proj__cap{position:absolute;left:0;bottom:0;z-index:2;padding:1.5rem 1.6rem;color:#fff}
.proj__cat{display:block;font-size:.72rem;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--gold-soft);margin-bottom:.3rem}
.proj__title{display:block;font-family:var(--font-display);font-size:1.25rem;font-weight:600;line-height:1.15}
.proj__loc{display:block;font-size:.85rem;color:rgba(255,255,255,.7);margin-top:.2rem}
.proj.col-6{grid-column:span 6}
.proj.col-5{grid-column:span 5}
.proj.col-7{grid-column:span 7}
.proj.col-4{grid-column:span 4}
.proj.col-8{grid-column:span 8}
.proj.col-12{grid-column:span 12}
.proj.tall{min-height:440px}
.proj.med{min-height:340px}

/* ============================================================
   Split feature
   ============================================================ */
.split{display:grid;grid-template-columns:1.05fr 1fr;gap:clamp(28px,5vw,72px);align-items:center}
.split.rev .split__media{order:2}
.split__media{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.split__media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.split__body h2{font-size:clamp(1.7rem,3.2vw,2.5rem)}
.split__body p{color:var(--ink-soft)}
.split--navy .split__body p{color:rgba(255,255,255,.75)}
.check-list{list-style:none;padding:0;margin:1.5rem 0 2rem;display:grid;gap:.8rem}
.check-list li{display:flex;gap:.7rem;align-items:flex-start;font-size:1.02rem}
.check-list svg{flex:0 0 auto;width:22px;height:22px;color:var(--gold);margin-top:2px}

/* ============================================================
   Team
   ============================================================ */
.team-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:1.6rem}
.member{text-align:left}
.member__photo{
  aspect-ratio:3/4;border-radius:var(--radius);overflow:hidden;margin-bottom:1rem;
  background:var(--paper-2);box-shadow:var(--shadow-soft);
}
.member__photo img{width:100%;height:100%;object-fit:cover;filter:grayscale(1);transition:filter .5s var(--ease)}
.member:hover .member__photo img{filter:grayscale(0)}
.member h3{font-size:1.12rem;margin-bottom:.15rem}
.member__role{font-size:.9rem;color:var(--ink-soft)}
.member__tag{font-size:.76rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--gold);margin-top:.35rem}

/* ============================================================
   Services list
   ============================================================ */
.svc-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:0;border-top:1px solid var(--line)}
.svc{padding:1.9rem 1.5rem 1.9rem 0;border-bottom:1px solid var(--line);display:flex;gap:1.2rem;align-items:baseline}
.svc__no{font-family:var(--font-display);font-size:1rem;font-weight:700;color:var(--gold);min-width:2.5em}
.svc h3{font-size:1.22rem;margin-bottom:.3rem}
.svc p{color:var(--ink-soft);font-size:.96rem;margin:0}

/* ============================================================
   Logos / clients
   ============================================================ */
.client-row{display:flex;flex-wrap:wrap;gap:1rem 2.4rem;align-items:center;justify-content:center}
.client-row span{
  font-family:var(--font-display);font-weight:600;font-size:1.15rem;color:var(--navy);opacity:.55;
  transition:opacity .3s var(--ease);
}
.client-row span:hover{opacity:1;color:var(--royal)}

/* ============================================================
   CTA banner
   ============================================================ */
.cta{position:relative;overflow:hidden;border-radius:0}
.cta__media{position:absolute;inset:0;z-index:0}
.cta__media img{width:100%;height:100%;object-fit:cover}
.cta__media::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(11,27,58,.92),rgba(28,75,143,.78))}
.cta__inner{position:relative;z-index:2;text-align:center;color:#fff;padding:clamp(64px,9vw,110px) 0}
.cta__inner h2{color:#fff;font-size:clamp(2rem,4vw,3.2rem);max-width:20ch;margin-inline:auto}
.cta__inner p{color:rgba(255,255,255,.8);max-width:50ch;margin:1rem auto 2rem;font-size:1.1rem}

/* ============================================================
   Contact
   ============================================================ */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,64px)}
.contact-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:2.4rem}
.contact-item{display:flex;gap:1rem;align-items:flex-start;margin-bottom:1.6rem}
.contact-item svg{width:26px;height:26px;color:var(--gold);flex:0 0 auto;margin-top:2px}
.contact-item h4{font-size:.82rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-soft);margin:0 0 .2rem}
.contact-item p{margin:0;font-size:1.1rem;color:var(--navy-deep);font-weight:500}
.form-field{margin-bottom:1.2rem}
.form-field label{display:block;font-size:.85rem;font-weight:600;color:var(--navy-deep);margin-bottom:.4rem}
.form-field input,.form-field textarea{
  width:100%;padding:.85em 1em;border:1.5px solid var(--line);border-radius:10px;
  font-family:inherit;font-size:1rem;color:var(--ink);background:#fff;transition:border-color .25s var(--ease);
}
.form-field input:focus,.form-field textarea:focus{outline:none;border-color:var(--royal)}
.form-field textarea{resize:vertical;min-height:130px}

/* ============================================================
   Page hero (interior pages)
   ============================================================ */
.page-hero{position:relative;background:var(--navy-deep);color:#fff;padding:clamp(60px,11vw,130px) 0 clamp(48px,7vw,80px);overflow:hidden}
.page-hero::before{
  content:"";position:absolute;right:-8%;top:-30%;width:520px;height:520px;
  background:radial-gradient(circle,rgba(201,162,75,.18),transparent 65%);
}
.page-hero__inner{position:relative;z-index:2;max-width:720px}
.page-hero h1{color:#fff;font-size:clamp(2.2rem,5vw,3.6rem)}
.page-hero p{color:rgba(255,255,255,.75);font-size:1.15rem;max-width:56ch}
.crumbs{font-size:.85rem;color:var(--gold-soft);letter-spacing:.04em;margin-bottom:1rem}
.crumbs a{color:rgba(255,255,255,.7)}
.crumbs a:hover{color:var(--gold)}

/* ============================================================
   Footer
   ============================================================ */
.site-footer{background:var(--navy-deep);color:rgba(255,255,255,.72);padding:clamp(56px,7vw,80px) 0 2rem}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:2.5rem;margin-bottom:3rem}
.site-footer img.f-logo{height:52px;margin-bottom:1.2rem}
.site-footer h4{color:#fff;font-size:.85rem;letter-spacing:.14em;text-transform:uppercase;margin-bottom:1.1rem}
.site-footer ul{list-style:none;margin:0;padding:0;display:grid;gap:.6rem}
.site-footer a{color:rgba(255,255,255,.72)}
.site-footer a:hover{color:var(--gold)}
.footer-tagline{font-size:.95rem;max-width:34ch;line-height:1.6}
.footer-bottom{border-top:1px solid rgba(255,255,255,.14);padding-top:1.6rem;display:flex;justify-content:space-between;flex-wrap:wrap;gap:1rem;font-size:.85rem;color:rgba(255,255,255,.5)}
.footer-disciplines{font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--gold-soft)}

/* ============================================================
   Lightbox
   ============================================================ */
.ts-lightbox{position:fixed;inset:0;z-index:1000;background:rgba(6,14,30,.94);display:none;align-items:center;justify-content:center}
.ts-lightbox.is-open{display:flex}
.ts-lightbox figure{margin:0;max-width:90vw;max-height:88vh;text-align:center}
.ts-lightbox img{max-width:90vw;max-height:80vh;object-fit:contain;border-radius:8px}
.ts-lightbox figcaption{color:rgba(255,255,255,.8);font-size:.9rem;letter-spacing:.12em;text-transform:uppercase;margin-top:16px}
.ts-lightbox__close{position:absolute;top:22px;right:26px;background:none;border:0;color:#fff;font-size:2.4rem;line-height:1;cursor:pointer;opacity:.8}
.ts-lightbox__close:hover{opacity:1}
.ts-lightbox__nav{position:absolute;top:50%;transform:translateY(-50%);background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.2);color:#fff;width:52px;height:52px;border-radius:50%;font-size:1.8rem;cursor:pointer;transition:.25s var(--ease)}
.ts-lightbox__nav:hover{background:var(--gold);color:var(--navy-deep);border-color:var(--gold)}
.ts-lightbox__prev{left:3vw}.ts-lightbox__next{right:3vw}

/* ============================================================
   Responsive
   ============================================================ */
@media(max-width:900px){
  .nav-menu{
    position:fixed;inset:74px 0 auto 0;background:var(--paper);flex-direction:column;
    align-items:flex-start;gap:0;padding:1rem var(--gutter) 2rem;border-bottom:1px solid var(--line);
    transform:translateY(-120%);transition:transform .4s var(--ease);box-shadow:var(--shadow-soft);
  }
  .nav-menu.open{transform:translateY(0)}
  .nav-menu li{width:100%}
  .nav-menu a{display:block;padding:.9em 0;border-bottom:1px solid var(--line);width:100%}
  .nav-cta{margin:1rem 0 0}
  .nav-toggle{display:block}
  .split,.split.rev .split__media{grid-template-columns:1fr;order:0}
  .split.rev .split__media{order:0}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:2rem}
  .stats{grid-template-columns:repeat(2,1fr)}
  .proj.col-6,.proj.col-5,.proj.col-7,.proj.col-4,.proj.col-8{grid-column:span 12}
}
@media(max-width:520px){
  .stats{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
}

@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .hero__media img{transform:none}
}