/* ============================================================
   GAMMA DESIGN — design tokens
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght,SOFT,WONK@9..144,300,0,0;9..144,400,0,0;9..144,500,0,0;9..144,600,0,0&family=Inter:wght@300;400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root{
  --ink:      #211F1B;
  --ink-70:   rgba(33,31,27,.7);
  --ink-45:   rgba(33,31,27,.45);
  --paper:    #F5F2EA;
  --paper-2:  #EFEADF;
  --sand:     #E3DCCB;
  --sage:     #737F68;
  --sage-dk:  #565F4E;
  --clay:     #9C6B45;
  --stone:    #CFC9BA;
  --line:     rgba(33,31,27,.14);
  --white:    #FCFBF8;

  --display: 'Fraunces', serif;
  --body:    'Inter', sans-serif;
  --mono:    'IBM Plex Mono', monospace;

  --wrap: 1320px;
  --gutter: clamp(24px, 5vw, 64px);
}

*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--body);
  color:var(--ink);
  background:var(--paper);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%; display:block;}
a{color:inherit; text-decoration:none;}
ul{list-style:none;}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms !important; transition-duration:.001ms !important;}
}

.wrap{max-width:var(--wrap); margin:0 auto; padding:0 var(--gutter);}

h1,h2,h3,h4{font-family:var(--display); font-weight:500; line-height:1.05; letter-spacing:-.01em; font-variation-settings:'opsz' 40, 'SOFT' 0, 'WONK' 0;}
h1{font-size:clamp(2.6rem, 6vw, 5rem); font-weight:400;}
h2{font-size:clamp(2rem, 4.2vw, 3.4rem); font-weight:400;}
h3{font-size:clamp(1.3rem, 2.4vw, 1.7rem); font-weight:500;}
p{max-width:60ch;}
p.lead{font-size:clamp(1.05rem,1.6vw,1.25rem); color:var(--ink-70); font-weight:300;}

.eyebrow{
  font-family:var(--mono); text-transform:uppercase; letter-spacing:.14em;
  font-size:.72rem; color:var(--sage-dk); display:flex; align-items:center; gap:10px;
}
.eyebrow::before{content:""; width:22px; height:1px; background:var(--sage-dk);}

/* ---------- signature waveform rule (echoes the GAMMA mark) ---------- */
.waveform{display:flex; align-items:flex-end; gap:3px; height:34px;}
.waveform span{width:2px; background:var(--sage); opacity:.55;}
.waveform.dark span{background:var(--paper); opacity:.5;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:10px;
  font-family:var(--mono); font-size:.78rem; text-transform:uppercase; letter-spacing:.1em;
  padding:15px 26px; border:1px solid var(--ink); border-radius:2px;
  transition:background .25s ease, color .25s ease, border-color .25s ease;
  white-space:nowrap;
}
.btn:hover{background:var(--ink); color:var(--paper);}
.btn.solid{background:var(--ink); color:var(--paper);}
.btn.solid:hover{background:var(--sage-dk); border-color:var(--sage-dk);}
.btn.on-dark{border-color:var(--paper); color:var(--paper);}
.btn.on-dark:hover{background:var(--paper); color:var(--ink);}
.btn svg{width:14px; height:14px;}

/* ---------- header ---------- */
.site-header{
  position:fixed; top:0; left:0; right:0; z-index:100;
  display:flex; align-items:center; justify-content:space-between;
  padding:22px var(--gutter);
  mix-blend-mode:normal;
  transition:background .35s ease, padding .35s ease, border-color .35s ease;
  border-bottom:1px solid transparent;
}
.site-header.solid{background:rgba(245,242,234,.92); backdrop-filter:blur(10px); border-color:var(--line); padding:14px var(--gutter);}
.brand img{height:30px; width:auto;}
.brand{display:flex; align-items:center;}

.nav-links{display:flex; gap:34px; align-items:center;}
.nav-links a{
  font-family:var(--mono); font-size:.74rem; text-transform:uppercase; letter-spacing:.09em;
  position:relative; padding-bottom:4px;
}
.nav-links a::after{
  content:""; position:absolute; left:0; bottom:0; width:0; height:1px; background:var(--ink);
  transition:width .25s ease;
}
.nav-links a:hover::after, .nav-links a.active::after{width:100%;}

.nav-cta{display:flex; align-items:center; gap:26px;}

.burger{display:none; flex-direction:column; gap:5px; cursor:pointer; z-index:200;}
.burger span{width:24px; height:1px; background:var(--ink); display:block;}

/* mobile nav */
.mobile-nav{
  position:fixed; inset:0; background:var(--ink); color:var(--paper); z-index:150;
  display:flex; flex-direction:column; justify-content:center; padding:var(--gutter);
  transform:translateY(-100%); transition:transform .4s cubic-bezier(.7,0,.2,1);
}
.mobile-nav.open{transform:translateY(0);}
.mobile-nav a{font-family:var(--display); font-size:2.2rem; font-weight:400; padding:12px 0; border-bottom:1px solid rgba(245,242,234,.15);}

@media (max-width:900px){
  .nav-links, .nav-cta .btn{display:none;}
  .burger{display:flex;}
}

/* ---------- footer ---------- */
.site-footer{background:var(--ink); color:var(--paper); padding:90px var(--gutter) 30px;}
.footer-grid{
  display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:40px; padding-bottom:60px;
  border-bottom:1px solid rgba(245,242,234,.15);
}
.footer-grid h4{font-family:var(--mono); font-size:.72rem; text-transform:uppercase; letter-spacing:.1em; color:var(--stone); margin-bottom:18px; font-weight:400;}
.footer-grid a, .footer-grid p{color:rgba(245,242,234,.75); font-size:.92rem; display:block; margin-bottom:10px;}
.footer-grid a:hover{color:var(--paper);}
.footer-bottom{display:flex; justify-content:space-between; align-items:center; padding-top:26px; font-family:var(--mono); font-size:.72rem; color:rgba(245,242,234,.5); flex-wrap:wrap; gap:12px;}
.footer-logo img{height:26px; margin-bottom:22px;}

@media (max-width:800px){
  .footer-grid{grid-template-columns:1fr 1fr; row-gap:36px;}
}

/* ---------- generic section spacing ---------- */
section{padding:110px 0;}
@media (max-width:700px){ section{padding:72px 0;} }

.section-head{max-width:760px; margin-bottom:60px;}
.section-head h2{margin-top:16px;}

.divider{height:1px; background:var(--line); width:100%;}

/* content is always visible; JS adds a very small, safe fade-up if it loads in time */
.reveal{opacity:1; transform:none; transition:opacity .6s ease, transform .6s ease;}
.reveal.pre{opacity:0; transform:translateY(16px);}

/* ---------- utility grid helpers ---------- */
.grid-2{display:grid; grid-template-columns:1fr 1fr; gap:var(--gutter);}
.grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:32px;}
@media (max-width:900px){ .grid-2, .grid-3{grid-template-columns:1fr;} }

.tag{
  font-family:var(--mono); font-size:.68rem; text-transform:uppercase; letter-spacing:.08em;
  border:1px solid var(--line); padding:5px 10px; border-radius:20px; color:var(--ink-70);
}

.num{font-family:var(--mono); color:var(--sage-dk); font-size:.85rem;}

.credit-note{
  font-family:var(--mono); font-size:.72rem; color:var(--ink-45); line-height:1.7;
  border-left:2px solid var(--stone); padding-left:16px; max-width:56ch;
}

/* ---------- language switcher ---------- */
.lang-switch{position:relative;}
.lang-btn{
  font-family:var(--mono); font-size:.72rem; text-transform:uppercase; letter-spacing:.08em;
  display:flex; align-items:center; gap:6px; cursor:pointer; padding:6px 2px; background:none; border:none; color:inherit;
}
.lang-btn svg{width:9px; height:9px; transition:transform .2s ease;}
.lang-switch.open .lang-btn svg{transform:rotate(180deg);}
.lang-menu{
  position:absolute; top:100%; right:0; margin-top:10px; background:var(--paper);
  border:1px solid var(--line); min-width:170px; box-shadow:0 12px 30px rgba(33,31,27,.12);
  opacity:0; visibility:hidden; transform:translateY(-6px); transition:opacity .2s ease, transform .2s ease, visibility .2s;
  z-index:200;
}
.lang-switch.open .lang-menu{opacity:1; visibility:visible; transform:translateY(0);}
.lang-menu a{
  display:flex; justify-content:space-between; gap:10px; padding:12px 16px;
  font-family:var(--body); font-size:.86rem; color:var(--ink); border-bottom:1px solid var(--line);
}
.lang-menu a:last-child{border-bottom:none;}
.lang-menu a:hover{background:var(--paper-2);}
.lang-menu a span.code{font-family:var(--mono); font-size:.68rem; color:var(--ink-45);}
.lang-menu a.current{color:var(--sage-dk); font-weight:500;}
@media (max-width:900px){ .lang-switch{margin-right:8px;} }