/* =========================================================
   Billaway India — Site Stylesheet
   Design system: editorial, boutique-advisory, bold/ambitious.
   Palette: deep teal/indigo ink, warm paper, muted gold accent,
   sustainability green as a supporting thread.
   ========================================================= */

:root{
  --ink:#0c2223;
  --ink-2:#123638;
  --indigo:#1c2a49;
  --paper:#faf7f1;
  --paper-2:#f2ede2;
  --white:#ffffff;
  --text:#161d1e;
  --text-muted:#5b6462;
  --text-soft:#8a9290;
  --line:#e4ddcd;
  --line-dark:rgba(250,247,241,0.16);
  --gold:#b6923f;
  --gold-soft:#e7d3a1;
  --green:#3f6b4a;
  --green-soft:#c9dccb;

  --serif:'Fraunces', Georgia, 'Times New Roman', serif;
  --sans:'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --maxw:1180px;
  --pad:clamp(20px, 5vw, 64px);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--sans);
  background:var(--paper);
  color:var(--text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img,svg{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{
  font-family:var(--serif);
  font-weight:600;
  line-height:1.12;
  margin:0 0 0.5em;
  letter-spacing:-0.01em;
  color:var(--ink);
}
p{margin:0 0 1em;}
.container{max-width:var(--maxw); margin:0 auto; padding:0 var(--pad);}
.eyebrow{
  display:inline-block;
  font-family:var(--sans);
  font-size:12.5px;
  font-weight:700;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--gold);
  margin-bottom:14px;
}
.lede{font-size:1.18rem; color:var(--text-muted); max-width:62ch;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:14px 26px;
  border-radius:2px;
  font-family:var(--sans);
  font-weight:600;
  font-size:0.95rem;
  border:1px solid transparent;
  cursor:pointer;
  transition:all .18s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--ink); color:var(--paper); border-color:var(--ink);}
.btn-primary:hover{background:var(--ink-2); transform:translateY(-1px);}
.btn-ghost{background:transparent; color:var(--ink); border-color:var(--ink);}
.btn-ghost:hover{background:var(--ink); color:var(--paper);}
.btn-on-dark{background:var(--gold); color:var(--ink); border-color:var(--gold);}
.btn-on-dark:hover{background:var(--gold-soft);}
.btn-ghost-on-dark{background:transparent; color:var(--paper); border-color:var(--line-dark);}
.btn-ghost-on-dark:hover{border-color:var(--paper);}
.cta-row{display:flex; gap:14px; flex-wrap:wrap; margin-top:28px;}

/* ---------- Nav ---------- */
.site-header{
  position:sticky; top:0; z-index:100;
  /* Solid background, no backdrop-filter: filter/backdrop-filter on an
     ancestor creates a new containing block for fixed-position children,
     which traps the mobile nav-links dropdown inside the header's own
     76px box instead of the viewport. Keep this header filter-free. */
  background:var(--paper);
  border-bottom:1px solid var(--line);
}
.nav{
  max-width:var(--maxw); margin:0 auto; padding:0 var(--pad);
  display:flex; align-items:center; justify-content:space-between;
  height:76px;
}
.brand{display:flex; align-items:center; gap:10px; font-family:var(--serif); font-weight:600; font-size:1.18rem; color:var(--ink);}
.brand-mark{width:30px; height:30px; flex:none;}
.nav-links{display:flex; align-items:center; gap:30px; list-style:none; margin:0; padding:0;}
.nav-links a{font-size:0.92rem; font-weight:600; color:var(--text-muted); transition:color .15s;}
.nav-links a:hover, .nav-links a.active{color:var(--ink);}
.nav-cta{display:flex; align-items:center; gap:18px;}
.nav-toggle{display:none; background:none; border:none; cursor:pointer; padding:8px;}
.nav-toggle span{display:block; width:22px; height:2px; background:var(--ink); margin:5px 0;}

@media (max-width: 900px){
  .nav-links{
    position:fixed; inset:76px 0 0 0; background:var(--paper);
    flex-direction:column; align-items:flex-start; gap:0;
    padding:10px var(--pad) 30px;
    transform:translateY(-8px); opacity:0; pointer-events:none;
    transition:all .2s ease; overflow-y:auto;
  }
  .nav-links.open{transform:translateY(0); opacity:1; pointer-events:auto;}
  .nav-links li{width:100%; border-bottom:1px solid var(--line);}
  .nav-links a{display:block; padding:16px 0;}
  .nav-toggle{display:block;}
  .nav-cta .btn-ghost{display:none;}
}

/* ---------- Hero (dark, cinematic) ---------- */
.hero{
  position:relative;
  background:linear-gradient(120deg, var(--ink) 0%, var(--ink) 42%, var(--indigo) 100%);
  color:var(--paper);
  overflow:hidden;
  padding:120px 0 100px;
}
.hero-inner{position:relative; z-index:2; max-width:720px;}
.hero h1{color:var(--paper); font-size:clamp(2.3rem, 5vw, 3.6rem);}
.hero .lede{color:rgba(250,247,241,0.78); font-size:1.2rem;}
.hero-art{position:absolute; inset:0; z-index:1; opacity:0.9;}
.hero-art svg{width:100%; height:100%;}

.page-hero{
  background:linear-gradient(135deg, var(--ink), var(--indigo));
  color:var(--paper);
  padding:96px 0 76px;
  position:relative;
  overflow:hidden;
}
.page-hero h1{color:var(--paper); font-size:clamp(2rem, 4.2vw, 3rem); max-width:16ch;}
.page-hero .lede{color:rgba(250,247,241,0.78);}
.page-hero-art{position:absolute; right:-6%; top:50%; transform:translateY(-50%); width:420px; opacity:0.5;}

/* ---------- Sections ---------- */
section{padding:88px 0;}
section.tight{padding:64px 0;}
.section-head{max-width:680px; margin-bottom:52px;}
.divider{height:1px; background:var(--line); border:none; margin:0;}

/* proof strip */
.proof{background:var(--ink); color:var(--paper); padding:34px 0;}
.proof .container{display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap:18px;}
.proof p{margin:0; font-size:0.98rem; color:rgba(250,247,241,0.82);}
.proof strong{color:var(--paper);}

/* impact numbers */
.stats{background:var(--paper-2);}
.stats-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:36px; text-align:center;}
.stat-num{font-family:var(--serif); font-size:clamp(2.1rem,4vw,3rem); color:var(--ink); font-weight:600;}
.stat-label{color:var(--text-muted); font-size:0.95rem; margin-top:6px;}
@media (max-width:760px){.stats-grid{grid-template-columns:1fr; gap:28px;}}

/* service cards */
.card-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:24px;}
.card{
  background:var(--white); border:1px solid var(--line); padding:30px 26px;
  border-radius:3px; transition:box-shadow .18s, transform .18s;
}
.card:hover{box-shadow:0 16px 32px rgba(12,34,35,0.08); transform:translateY(-3px);}
.card-num{font-family:var(--serif); color:var(--gold); font-weight:600; font-size:0.95rem; margin-bottom:14px; display:block;}
.card h3{font-size:1.15rem; margin-bottom:10px;}
.card p{color:var(--text-muted); font-size:0.96rem; margin:0;}
@media (max-width:980px){.card-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:560px){.card-grid{grid-template-columns:1fr;}}

/* difference / two column */
.split{display:grid; grid-template-columns:1fr 1fr; gap:64px; align-items:center;}
.split.reverse .split-art{order:2;}
@media (max-width:900px){.split{grid-template-columns:1fr; gap:36px;} .split.reverse .split-art{order:0;}}

/* featured engagement callout */
.callout{
  background:var(--ink); color:var(--paper); border-radius:4px;
  padding:56px var(--pad); display:grid; grid-template-columns:1.1fr 0.9fr; gap:48px; align-items:center;
}
.callout h3{color:var(--paper); font-size:clamp(1.5rem,3vw,2.1rem);}
.callout p{color:rgba(250,247,241,0.78);}
.callout a.link-arrow{color:var(--gold); font-weight:600;}
@media (max-width:860px){.callout{grid-template-columns:1fr;}}

/* phase / process steps */
.steps{display:grid; grid-template-columns:repeat(4,1fr); gap:24px;}
.step{border-top:3px solid var(--gold); padding-top:20px;}
.step .step-tag{font-size:0.82rem; letter-spacing:0.08em; text-transform:uppercase; color:var(--text-soft); font-weight:700; margin-bottom:10px;}
.step h3{font-size:1.12rem;}
.step p{color:var(--text-muted); font-size:0.95rem;}
@media (max-width:980px){.steps{grid-template-columns:repeat(2,1fr);}}
@media (max-width:560px){.steps{grid-template-columns:1fr;}}

/* checklist */
.checklist{list-style:none; margin:0; padding:0; display:grid; gap:16px;}
.checklist li{display:flex; gap:14px; align-items:flex-start; color:var(--text-muted); font-size:1.02rem;}
.checklist li svg{flex:none; margin-top:4px;}

/* case studies */
.case{
  border:1px solid var(--line); border-radius:4px; padding:44px var(--pad-card, 40px); margin-bottom:26px; background:var(--white);
}
.case-meta{display:flex; gap:10px; flex-wrap:wrap; font-size:0.86rem; color:var(--text-soft); margin-bottom:18px; text-transform:uppercase; letter-spacing:0.04em;}
.case-meta span:not(:last-child)::after{content:"·"; margin-left:10px; color:var(--line);}
.case h3{font-size:1.55rem; max-width:26ch;}
.case-grid{display:grid; grid-template-columns:1fr 1fr; gap:30px; margin-top:22px;}
.case-grid h4{font-family:var(--sans); font-size:0.86rem; text-transform:uppercase; letter-spacing:0.06em; color:var(--text-soft); margin-bottom:8px;}
.metrics{list-style:none; margin:16px 0 0; padding:0; display:grid; gap:10px;}
.metrics li{padding-left:20px; position:relative; font-weight:600; color:var(--ink);}
.metrics li::before{content:""; position:absolute; left:0; top:9px; width:8px; height:8px; background:var(--gold); border-radius:50%;}
@media (max-width:760px){.case-grid{grid-template-columns:1fr;}}

/* article / perspectives */
.article-card{border-bottom:1px solid var(--line); padding:40px 0;}
.article-card:first-child{padding-top:0;}
.article-tag{font-size:0.85rem; text-transform:uppercase; letter-spacing:0.08em; color:var(--gold); font-weight:700; margin-bottom:10px;}
.article-card h3{font-size:1.5rem; max-width:32ch;}
.article-dek{color:var(--text-muted); font-style:italic; margin-bottom:16px;}

/* pull quote */
.pull{
  border-left:3px solid var(--gold); padding:6px 0 6px 26px; margin:36px 0;
  font-family:var(--serif); font-size:1.3rem; color:var(--ink); font-style:italic;
}

/* team/join cards */
.value-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:22px;}
.value-card{background:var(--paper-2); padding:26px 28px; border-radius:3px;}
.value-card strong{display:block; color:var(--ink); font-family:var(--serif); font-size:1.05rem; margin-bottom:6px;}
.value-card span{color:var(--text-muted); font-size:0.95rem;}
@media (max-width:700px){.value-grid{grid-template-columns:1fr;}}

/* engagement tags */
.tag-list{display:flex; flex-wrap:wrap; gap:10px;}
.tag{border:1px solid var(--line); padding:10px 18px; border-radius:30px; font-size:0.9rem; font-weight:600; color:var(--text-muted);}

/* contact */
.contact-grid{display:grid; grid-template-columns:1.1fr 0.9fr; gap:56px;}
.contact-card{background:var(--ink); color:var(--paper); border-radius:4px; padding:40px;}
.contact-card h3{color:var(--paper);}
.contact-line{display:flex; gap:12px; padding:14px 0; border-top:1px solid var(--line-dark); font-size:0.98rem;}
.contact-line:first-of-type{border-top:none;}
.contact-line b{color:var(--gold); min-width:26px;}
@media (max-width:900px){.contact-grid{grid-template-columns:1fr;}}

/* footer */
.site-footer{background:var(--ink); color:rgba(250,247,241,0.68); padding:64px 0 30px;}
.footer-top{display:grid; grid-template-columns:1.4fr repeat(3,1fr); gap:40px; padding-bottom:40px; border-bottom:1px solid var(--line-dark);}
.footer-brand{font-family:var(--serif); color:var(--paper); font-size:1.2rem; margin-bottom:10px;}
.footer-col h4{color:var(--paper); font-family:var(--sans); font-size:0.85rem; text-transform:uppercase; letter-spacing:0.06em; margin-bottom:14px;}
.footer-col a{display:block; color:rgba(250,247,241,0.68); font-size:0.92rem; padding:6px 0;}
.footer-col a:hover{color:var(--paper);}
.footer-bottom{display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px; padding-top:26px; font-size:0.85rem;}
@media (max-width:860px){.footer-top{grid-template-columns:1fr 1fr;}}

/* image direction placeholders — art frames */
.art-frame{border-radius:4px; overflow:hidden; border:1px solid var(--line); background:var(--paper-2);}
.art-caption{font-size:0.78rem; color:var(--text-soft); margin-top:10px; font-style:italic;}

/* image strip (services) */
.img-strip{display:grid; grid-template-columns:repeat(5,1fr); gap:2px; margin-bottom:60px; border-radius:4px; overflow:hidden;}
.img-strip .strip-item{aspect-ratio:1/1;}
@media (max-width:760px){.img-strip{grid-template-columns:repeat(3,1fr);} .img-strip .strip-item:nth-child(n+4){display:none;}}

/* reveal on scroll — content is visible by default; JS only adds a subtle
   fade-up when it can guarantee the observer fires, so the page never
   depends on JavaScript to show its content. */
.reveal{opacity:1; transform:none;}
html.js-reveal-ready .reveal{opacity:0; transform:translateY(14px); transition:opacity .6s ease, transform .6s ease;}
html.js-reveal-ready .reveal.is-visible{opacity:1; transform:translateY(0);}

/* utility */
.mt-0{margin-top:0;}
.center{text-align:center; margin-left:auto; margin-right:auto;}
.small-caps{text-transform:uppercase; letter-spacing:0.08em; font-size:0.82rem; font-weight:700; color:var(--text-soft);}
.max-56{max-width:56ch;}

@media (max-width:900px){
  .card-grid, .steps{gap:18px;}
  section{padding:64px 0;}
  .contact-card{padding:30px;}
}