/* ============================================================
   BILERA CONSULTORES — Sistema visual "Claridad" (Dirección A)
   Paper + ink + acento arcilla · Spectral + Hanken Grotesk
   ============================================================ */

:root{
  --paper:#F4F1E9; --paper2:#EFEBE0; --card:#FBF9F3; --ink:#18211C; --ink2:#3C453E;
  --mut:#6A726A; --green:#648743; --green-d:#4F6E34; --sage:#7C8A6E;
  --line:rgba(24,33,28,.13); --line2:rgba(24,33,28,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Hanken Grotesk',sans-serif; background:var(--paper); color:var(--ink);
  -webkit-font-smoothing:antialiased; line-height:1.5;
}
.serif{font-family:'Spectral',serif}
img{max-width:100%;display:block}
a{color:inherit}

/* ---------- layout ---------- */
.wrap{max-width:1280px;margin:0 auto;padding:0 56px}
.eyebrow{font-size:13px;letter-spacing:.22em;text-transform:uppercase;color:var(--green);font-weight:600}
.section{padding:104px 0}
.section.tight{padding:72px 0}

/* ---------- placeholder ---------- */
.ph{background:linear-gradient(135deg,#E8E3D6,#DAD3C2);border:1px solid var(--line);
  border-radius:8px;display:flex;align-items:flex-end;padding:18px;position:relative;overflow:hidden}
.ph::after{content:"";position:absolute;inset:0;
  background-image:radial-gradient(circle at 1px 1px,rgba(24,33,28,.10) 1px,transparent 0);
  background-size:22px 22px;opacity:.5}
.ph.dark{background:linear-gradient(135deg,#26302A,#1B241F);border-color:rgba(255,255,255,.08)}
.ph.dark::after{background-image:radial-gradient(circle at 1px 1px,rgba(255,255,255,.08) 1px,transparent 0)}
.ph-tag{position:relative;z-index:1;font-size:12px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--ink2);background:rgba(251,249,243,.85);padding:5px 10px;border-radius:3px;font-weight:600}
.ph.dark .ph-tag{background:rgba(24,33,28,.7);color:#Bfd0ab}

/* ---------- real photos ---------- */
.shot{width:100%;object-fit:cover;border-radius:8px;border:1px solid var(--line);
  display:block;background:var(--paper2)}
.now-r .shot{height:100%;border-radius:0;border:none}

/* ---------- footer social ---------- */
.foot-social{display:flex;gap:10px;margin-top:20px}
.foot-social a{width:40px;height:40px;border-radius:50%;border:1px solid rgba(255,255,255,.18);
  display:flex;align-items:center;justify-content:center;color:#C3C7BE;transition:background .2s,color .2s,border-color .2s}
.foot-social a:hover{background:var(--green);border-color:var(--green);color:#fff}
.foot-social svg{width:18px;height:18px}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:9px;background:var(--ink);color:#F4F1E9;
  padding:14px 24px;border-radius:40px;font-size:15px;font-weight:600;text-decoration:none;
  border:none;cursor:pointer;white-space:nowrap;transition:transform .18s,background .2s}
.btn:hover{transform:translateY(-2px)}
.btn .ar{transition:transform .2s}
.btn:hover .ar{transform:translateX(3px)}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn.ghost:hover{background:var(--card)}
.btn.green{background:var(--green);color:#fff}
.btn.lg{padding:16px 30px;font-size:16px}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(244,241,233,.86);
  backdrop-filter:saturate(140%) blur(12px);border-bottom:1px solid var(--line)}
.nav-in{max-width:1280px;margin:0 auto;padding:18px 56px;display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--ink)}
.logo .dot{width:11px;height:11px;border-radius:50%;background:var(--green);flex:0 0 auto}
.logo .lt{font-weight:700;font-size:20px;letter-spacing:-.01em;line-height:1}
.logo .lt small{display:block;font-size:9.5px;letter-spacing:.24em;color:var(--mut);font-weight:600;margin-top:3px}
.logo img.mark{height:34px;width:auto;display:block}
.menu{display:flex;gap:32px;list-style:none;font-size:15px;color:var(--ink2);font-weight:500}
.menu a{color:inherit;text-decoration:none;padding:6px 0;position:relative;transition:color .2s}
.menu a:hover{color:var(--ink)}
.menu a.active{color:var(--ink)}
.menu a.active::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--green);border-radius:2px}
.nav-cta{display:flex;align-items:center;gap:14px}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.burger span{width:24px;height:2px;background:var(--ink);border-radius:2px}

/* ---------- page hero (interior pages) ---------- */
.phero{padding:72px 0 48px;border-bottom:1px solid var(--line)}
.phero .eyebrow{margin-bottom:22px}
.phero h1{font-size:64px;line-height:1.03;letter-spacing:-.02em;font-weight:500;max-width:880px}
.phero h1 em{font-style:italic;color:var(--green)}
.phero .sub{font-size:19px;line-height:1.6;color:var(--ink2);max-width:560px;margin-top:24px}
.crumb{font-size:13.5px;color:var(--mut);margin-bottom:30px;display:flex;gap:8px;align-items:center}
.crumb a{text-decoration:none;color:var(--mut)}
.crumb a:hover{color:var(--ink)}

/* ---------- section head ---------- */
.sechead{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:48px;
  border-bottom:1px solid var(--line);padding-bottom:26px;gap:30px;flex-wrap:wrap}
.sectitle{font-size:46px;line-height:1.05;letter-spacing:-.02em;font-weight:500;max-width:640px}

/* ---------- footer ---------- */
.foot{background:var(--ink);color:#C3C7BE;padding:72px 0 40px}
.foot-in{max-width:1280px;margin:0 auto;padding:0 56px}
.foot-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px;padding-bottom:46px;border-bottom:1px solid rgba(255,255,255,.12)}
.foot h5{font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:#8E938A;margin-bottom:18px;font-weight:600}
.foot a,.foot li{color:#C3C7BE;text-decoration:none;font-size:15.5px;line-height:2;list-style:none}
.foot a:hover{color:#F4F1E9}
.foot .lg{font-weight:700;font-size:22px;color:#F4F1E9;margin-bottom:14px;display:flex;align-items:center;gap:10px}
.foot .lg .dot{width:10px;height:10px;border-radius:50%;background:var(--green)}
.foot .lg small{display:block;font-size:9.5px;letter-spacing:.24em;color:#8E938A;font-weight:600;margin-top:3px}
.foot .lg img.mark{height:38px;width:auto;display:block}
.foot-desc{font-size:15px;line-height:1.6;color:#9AA096;max-width:300px}
.foot-bot{display:flex;justify-content:space-between;padding-top:24px;font-size:13.5px;color:#8E938A;flex-wrap:wrap;gap:10px}

/* ---------- reveal on scroll ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* ---------- responsive ---------- */
@media (max-width:980px){
  .wrap,.nav-in,.foot-in{padding-left:28px;padding-right:28px}
  .menu{display:none}
  .burger{display:flex}
  .nav.open .menu{display:flex;position:absolute;top:100%;left:0;right:0;flex-direction:column;
    background:var(--paper);border-bottom:1px solid var(--line);padding:20px 28px;gap:18px}
  .phero h1{font-size:44px}
  .sectitle{font-size:34px}
  .foot-top{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:620px){
  .phero h1{font-size:36px}
  .foot-top{grid-template-columns:1fr}
}