/* ═══════════════════════════════════════════════════════════
   CONTTAX — Consultores Internacionales LLC
   Rediseño estilo editorial "Big Four" (PwC) · Acento cobre
   ═══════════════════════════════════════════════════════════ */

:root{
  /* ── Paleta oficial CONTTAX ── */
  --accent:#B07860;       /* Cobre        */
  --accent-dark:#8B5E4A;  /* Cobre oscuro */
  --accent-mid:#C49A80;   /* Cobre medio  */
  --accent-soft:#EAD8CC;  /* Cobre claro  */
  --primary:#B07860;      /* alias usado por script.js */
  --ink:#1C1412;          /* Oscuro CONTTAX */
  --ink-2:#3D2E29;        /* Oscuro medio   */
  --muted:#8B7870;        /* Texto secundario */
  --bg:#ffffff;
  --bg-soft:#FAF7F5;      /* Crema CONTTAX */
  --line:#E0D5CF;         /* Borde CONTTAX */
  --dark-2:#2A1F1C; --dark-3:#3D2E29;
  --success:#6B8F5E;      /* Verde tierra */
  --maxw:1280px;
  --t:.25s ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:'Inter',system-ui,Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.6;
  font-size:17px;overflow-x:hidden;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 40px}

/* Motivo de cuadritos cobre (firma tipo PwC) */
.squares{display:inline-grid;grid-template-columns:repeat(2,7px);gap:2px;vertical-align:middle}
.squares i{width:7px;height:7px;display:block}
.squares i:nth-child(1){background:var(--accent-dark)}
.squares i:nth-child(2){background:var(--accent)}
.squares i:nth-child(3){background:var(--accent-soft)}
.squares i:nth-child(4){background:var(--accent-mid)}

.eyebrow{display:flex;align-items:center;gap:10px;font-size:.78rem;font-weight:700;
  letter-spacing:.16em;text-transform:uppercase;color:var(--accent-dark)}

.h-display{font-weight:800;letter-spacing:-.02em;line-height:1.04;color:var(--ink)}
.lede{color:var(--muted);font-size:1.12rem;max-width:60ch}

.btn{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:.98rem;
  padding:15px 26px;border-radius:2px;border:1.5px solid transparent;cursor:pointer;
  transition:all var(--t);white-space:nowrap}
.btn svg{width:18px;height:18px}
.btn-primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn-primary:hover{background:var(--accent-dark);border-color:var(--accent-dark);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff}
.btn-light{background:#fff;color:var(--ink);border-color:#fff}
.btn-light:hover{background:transparent;color:#fff;border-color:#fff}
.btn-lg{padding:17px 32px;font-size:1.02rem}
.btn-full{width:100%;justify-content:center}

.arrow-link{display:inline-flex;align-items:center;gap:8px;font-weight:700;color:var(--accent-dark);
  border-bottom:2px solid transparent;padding-bottom:2px;transition:all var(--t)}
.arrow-link:hover{gap:14px;border-color:var(--accent)}

/* ── Utility bar ───────────────────────────────────────── */
.topbar-accent{height:4px;background:linear-gradient(90deg,var(--accent-dark) 0%,var(--accent) 30%,var(--accent-mid) 55%,var(--accent-soft) 78%,var(--success) 100%)}
.utility{background:var(--ink);color:#cfc6bf;font-size:.82rem}
.utility .wrap{display:flex;justify-content:space-between;align-items:center;height:38px}
.utility a{color:#cfc6bf;transition:color var(--t)}
.utility a:hover{color:#fff}
.utility .u-right{display:flex;gap:22px;align-items:center}
.utility .u-right .sep{opacity:.3}

/* ── Navbar ────────────────────────────────────────────── */
.navbar{position:sticky;top:0;z-index:1000;background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow var(--t)}
.navbar.scrolled{box-shadow:0 6px 24px rgba(26,21,18,.08)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:78px}
.brand{display:flex;align-items:center;gap:12px}
.brand img{height:46px;width:auto;border-radius:4px}
.brand .b-names{display:flex;flex-direction:column;line-height:1.1}
.brand .b-marca{font-weight:800;font-size:1.25rem;letter-spacing:.04em;color:var(--ink)}
.brand .b-marca b{color:var(--accent)}
.brand .b-sub{font-size:.62rem;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);font-weight:600}
.nav-links{display:flex;align-items:center;gap:30px}
.nav-links a{font-size:.95rem;font-weight:600;color:var(--ink-2);position:relative;padding:6px 0;transition:color var(--t)}
.nav-links a::after{content:'';position:absolute;left:0;bottom:-2px;height:2px;width:0;background:var(--accent);transition:width var(--t)}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after{width:100%}
.nav-cta{margin-left:6px}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.hamburger span{width:26px;height:2px;background:var(--ink);transition:all var(--t)}

/* ── Hero (full-bleed editorial) ───────────────────────── */
.hero{position:relative;min-height:88vh;display:flex;align-items:flex-end;color:#fff;
  background:#1A1512;overflow:hidden}
.hero-bg{position:absolute;inset:0;
  background:url('img/1554224155-6726b3ff858f.jpg') center/cover no-repeat;
  transform:scale(1.03)}
.hero-overlay{position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(20,17,15,.92) 0%,rgba(20,17,15,.72) 42%,rgba(20,17,15,.28) 100%)}
.hero .wrap{position:relative;z-index:2;width:100%;padding-top:90px;padding-bottom:80px}
.hero-eyebrow{display:flex;align-items:center;gap:12px;color:var(--accent-soft);font-weight:700;
  letter-spacing:.16em;text-transform:uppercase;font-size:.8rem;margin-bottom:26px}
.hero-eyebrow .squares i{background:var(--accent-soft)}
.hero h1{font-size:clamp(2.6rem,6vw,5rem);font-weight:800;letter-spacing:-.025em;line-height:1.02;max-width:16ch}
.hero h1 .acc{color:var(--accent)}
.hero p.sub{margin-top:24px;font-size:1.2rem;color:#e7ded7;max-width:54ch}
.hero-certs{display:flex;flex-wrap:wrap;gap:8px 26px;margin-top:24px;color:#cdbfb4;font-size:.92rem;font-weight:600}
.hero-ctas{display:flex;flex-wrap:wrap;gap:14px;margin-top:38px}
.hero-stats{display:flex;gap:0;margin-top:54px;border-top:1px solid rgba(255,255,255,.18);padding-top:26px;max-width:640px}
.hero-stats .s{flex:1}
.hero-stats .s strong{display:block;font-size:2.3rem;font-weight:800;letter-spacing:-.02em}
.hero-stats .s span{color:#cdbfb4;font-size:.86rem;letter-spacing:.04em}

/* ── Section scaffolding ───────────────────────────────── */
.section{padding:110px 0}
.section.soft{background:var(--bg-soft)}
.section.gold{background:linear-gradient(180deg,#FAF7F5 0%,#F3E7DD 100%)}
.section.ink{background:var(--ink);color:#fff}
.sec-head{max-width:760px;margin-bottom:58px}
.sec-head .eyebrow{margin-bottom:16px}
.sec-head h2{font-size:clamp(2rem,3.6vw,3rem);font-weight:800;letter-spacing:-.02em;line-height:1.06}
.sec-head h2 .acc{color:var(--accent)}
.sec-head p{margin-top:18px;color:var(--muted);font-size:1.1rem}
.section.ink .sec-head p{color:#cdbfb4}

[data-aos]{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
[data-aos].aos-visible{opacity:1;transform:none}

/* ── Servicios (editorial cards) ───────────────────────── */
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:2px;background:var(--line)}
.svc{background:#fff;padding:0 0 30px;display:flex;flex-direction:column;transition:all var(--t);position:relative;border-top:4px solid var(--accent)}
.svc:nth-child(6n+1){border-top-color:var(--accent-dark)}
.svc:nth-child(6n+2){border-top-color:var(--accent)}
.svc:nth-child(6n+3){border-top-color:var(--accent-mid)}
.svc:nth-child(6n+4){border-top-color:var(--success)}
.svc:nth-child(6n+5){border-top-color:var(--accent-dark)}
.svc:nth-child(6n){border-top-color:var(--accent-mid)}
.svc:hover{transform:translateY(-4px);box-shadow:0 20px 50px rgba(28,20,18,.13);z-index:2}
.svc-img{position:relative;aspect-ratio:16/10;overflow:hidden}
.svc-img img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.svc:hover .svc-img img{transform:scale(1.06)}
.svc-badge{position:absolute;top:16px;left:16px;background:var(--accent);color:#fff;font-size:.72rem;
  font-weight:700;letter-spacing:.04em;padding:5px 12px;text-transform:uppercase}
.svc-body{padding:26px 28px 0;display:flex;flex-direction:column;flex:1}
.svc .cat{font-size:.74rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--accent-dark)}
.svc:nth-child(2) .cat{color:var(--accent)}
.svc:nth-child(3) .cat{color:var(--accent-mid)}
.svc:nth-child(4) .cat{color:var(--success)}
.svc:nth-child(6) .cat{color:var(--accent-mid)}
.svc:nth-child(4) li::before{background:var(--success)}
.svc h3{font-size:1.4rem;font-weight:800;letter-spacing:-.01em;margin:10px 0 12px;line-height:1.15}
.svc p{color:var(--muted);font-size:.96rem;margin-bottom:16px}
.svc ul{list-style:none;margin:0 0 20px}
.svc li{font-size:.9rem;color:var(--ink-2);padding-left:20px;position:relative;margin:6px 0}
.svc li::before{content:'';position:absolute;left:0;top:.55em;width:9px;height:2px;background:var(--accent)}
.svc .arrow-link{margin-top:auto;padding:0 0 2px}
.svc-body.tail{padding-top:0}

/* ── Nosotros ──────────────────────────────────────────── */
.about-values{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:30px}
.val{display:flex;gap:14px;align-items:flex-start}
.val .vico{flex-shrink:0;width:44px;height:44px;border:1.5px solid var(--line);border-radius:2px;
  display:flex;align-items:center;justify-content:center;background:#fff}
.val strong{display:block;font-size:1rem}
.val p{font-size:.9rem;color:var(--muted);margin-top:2px}
.about-visual{position:relative}
.about-visual>img{width:100%;aspect-ratio:4/5;object-fit:cover}
.about-cred-card{position:absolute;right:-16px;bottom:84px;max-width:260px;background:#fff;
  border:1px solid var(--line);border-top:4px solid var(--accent);padding:20px 22px;box-shadow:0 20px 50px rgba(28,20,18,.14)}
.about-cred-card h4{font-size:1rem;font-weight:800;margin-bottom:8px}
.about-cred-card p{font-size:.84rem;color:var(--muted);margin-bottom:10px}
.about-cred-card ul{list-style:none}
.about-cred-card li{font-size:.84rem;color:var(--ink-2);padding-left:18px;position:relative;margin:4px 0}
.about-cred-card li::before{content:'';position:absolute;left:0;top:.55em;width:9px;height:2px;background:var(--accent)}
.about-badges{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:14px}
.bdg{background:var(--bg-soft);border:1px solid var(--line);padding:14px 10px;text-align:center}
.bdg b{display:block;color:var(--accent-dark);font-weight:800;font-size:1rem}
.bdg span{font-size:.74rem;color:var(--muted);line-height:1.3;display:block;margin-top:3px}

/* ── Regímenes ─────────────────────────────────────────── */
.reg-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:2px;background:var(--line);border:1px solid var(--line)}
.reg{background:#fff;display:flex;align-items:center;gap:20px;padding:22px 26px;transition:background var(--t)}
.reg:hover{background:var(--bg-soft)}
.reg .code{font-weight:800;font-size:1.05rem;color:var(--accent);min-width:70px;letter-spacing:.02em}
.reg:nth-child(3n+1) .code{color:var(--accent-dark)}
.reg:nth-child(3n+2) .code{color:var(--accent)}
.reg:nth-child(3n) .code{color:var(--accent-mid)}
.reg .info strong{display:block;font-size:1.02rem;font-weight:700}
.reg .info span{font-size:.88rem;color:var(--muted)}
.reg.hot{background:linear-gradient(120deg,#fff, #faf3ee)}
.reg.hot .code{color:var(--accent-dark)}

/* ── Calculadora ───────────────────────────────────────── */
.calc{max-width:1000px;margin:0 auto;background:#fff;border:1px solid var(--line);box-shadow:0 24px 60px rgba(26,21,18,.08)}
.calc-tabs{display:flex;border-bottom:1px solid var(--line)}
.calc-tab{flex:1;padding:20px;background:#fff;border:0;border-bottom:3px solid transparent;font-weight:700;
  font-size:1rem;color:var(--muted);cursor:pointer;transition:all var(--t)}
.calc-tab.active{color:var(--ink);border-bottom-color:var(--accent);background:var(--bg-soft)}
.calc-panel{display:none;padding:36px}
.calc-panel.active{display:block}
.calc-grid{display:grid;grid-template-columns:1fr 1fr;gap:34px}
.form-group{margin-bottom:18px}
.form-group label{display:block;font-size:.84rem;font-weight:700;color:var(--ink-2);margin-bottom:7px;letter-spacing:.02em}
.form-group input,.form-group select,.calc select,.calc input{width:100%;padding:13px 14px;border:1.5px solid var(--line);
  border-radius:2px;font-family:inherit;font-size:1rem;color:var(--ink);background:#fff;transition:border var(--t)}
.form-group input:focus,.form-group select:focus{outline:none;border-color:var(--accent)}
.input-prefix{display:flex;align-items:center;border:1.5px solid var(--line);border-radius:2px;overflow:hidden}
.input-prefix span{padding:0 14px;color:var(--muted);background:var(--bg-soft);align-self:stretch;display:flex;align-items:center;font-weight:700}
.input-prefix input{border:0}
.input-prefix input:focus{outline:none}
.input-prefix:focus-within{border-color:var(--accent)}
.calc-results{background:var(--bg-soft);border:1px solid var(--line);border-radius:2px;padding:24px;display:flex;align-items:center;justify-content:center;min-height:280px}
.result-placeholder{text-align:center;color:var(--muted)}
.result-placeholder span{font-size:2.4rem;display:block;margin-bottom:10px}
.result-header{font-weight:800;color:var(--accent-dark);font-size:1.05rem;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.result-item{display:flex;justify-content:space-between;gap:14px;padding:8px 0;font-size:.95rem;border-bottom:1px dashed var(--line)}
.result-label{color:var(--muted)}
.result-value{font-weight:700;color:var(--ink)}
.result-total{margin-top:6px;border-bottom:0;background:var(--accent);color:#fff;padding:14px;border-radius:2px}
.result-total .result-label,.result-total .result-value{color:#fff;font-weight:800}
.result-cta{margin-top:16px;font-size:.9rem;color:var(--muted)}
.result-cta a{color:var(--accent-dark);font-weight:700}
.calc-disclaimer{max-width:1000px;margin:18px auto 0;font-size:.84rem;color:var(--muted);text-align:center}

/* ── Guías ─────────────────────────────────────────────── */
.guias-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.guia{background:#fff;border:1px solid var(--line);padding:26px;display:flex;flex-direction:column;
  transition:all var(--t)}
.guia:hover{border-color:var(--accent);box-shadow:0 16px 40px rgba(26,21,18,.10);transform:translateY(-3px)}
.guia.hot{border-color:var(--accent);background:linear-gradient(180deg,#fff,#faf4ef)}
.guia .ico{font-size:1.7rem;margin-bottom:14px}
.guia .tag{font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--accent-dark);margin-bottom:8px}
.guia:nth-child(3n+1) .tag{color:var(--accent-dark)}
.guia:nth-child(3n+2) .tag{color:var(--accent)}
.guia:nth-child(3n) .tag{color:var(--accent-mid)}
.guia h4{font-size:1.12rem;font-weight:800;line-height:1.2;margin-bottom:10px}
.guia p{font-size:.9rem;color:var(--muted);margin-bottom:18px;flex:1}
.guia .dl{display:inline-flex;align-items:center;gap:9px;font-weight:700;font-size:.9rem;color:#fff;
  background:var(--accent);padding:11px 16px;border-radius:2px;transition:background var(--t);align-self:flex-start}
.guia .dl:hover{background:var(--accent-dark)}
.guia .dl svg{width:16px;height:16px}
.guias-note{margin-top:34px;font-size:.9rem;color:var(--muted);text-align:center}

/* ── Imagen ejecutiva ──────────────────────────────────── */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center}
.split .x-content h2{font-size:clamp(1.9rem,3.2vw,2.7rem);font-weight:800;letter-spacing:-.02em;line-height:1.08;margin:14px 0 18px}
.split .x-content h2 .acc{color:var(--accent)}
.split .x-content .lede{margin-bottom:26px}
.x-items{display:flex;flex-direction:column;gap:18px;margin-bottom:30px}
.x-item{display:flex;gap:16px;align-items:flex-start}
.x-item .x-ico{flex-shrink:0;width:44px;height:44px;border:1.5px solid var(--accent);color:var(--accent-dark);
  display:flex;align-items:center;justify-content:center;border-radius:2px}
.x-item strong{display:block;font-size:1rem}
.x-item span{font-size:.9rem;color:var(--muted)}
.x-photo{position:relative}
.x-photo img{width:100%;aspect-ratio:4/5;object-fit:cover}
.x-photo .x-badge{position:absolute;left:-18px;bottom:30px;background:var(--ink);color:#fff;padding:18px 22px}
.x-photo .x-badge strong{display:block;font-size:1.05rem;color:var(--accent-soft)}
.x-photo .x-badge span{font-size:.8rem;color:#cdbfb4}

/* ── Testimonios ───────────────────────────────────────── */
.tst-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.tst{background:var(--dark-2);border:1px solid var(--dark-3);padding:30px;border-left:3px solid var(--accent)}
.tst .stars{color:var(--accent);letter-spacing:2px;margin-bottom:14px}
.tst p{color:#e7ded7;font-size:.98rem;font-style:italic;margin-bottom:20px}
.tst .who{display:flex;align-items:center;gap:14px}
.tst:nth-child(1){border-left-color:var(--accent-dark)}
.tst:nth-child(2){border-left-color:var(--accent)}
.tst:nth-child(3){border-left-color:var(--accent-mid)}
.tst .av{width:46px;height:46px;border-radius:50%;background:var(--accent);color:#fff;font-weight:800;
  display:flex;align-items:center;justify-content:center;font-size:.95rem}
.tst:nth-child(2) .av{background:var(--accent-dark)}
.tst:nth-child(3) .av{background:var(--accent-mid)}
.tst .who strong{display:block;color:#fff;font-size:.96rem}
.tst .who span{color:#cdbfb4;font-size:.84rem}

/* ── Contacto ──────────────────────────────────────────── */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px}
.contact-card{background:#fff;border:1px solid var(--line);padding:36px;box-shadow:0 20px 50px rgba(26,21,18,.06)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
textarea{width:100%;padding:13px 14px;border:1.5px solid var(--line);border-radius:2px;font-family:inherit;font-size:1rem;resize:vertical}
textarea:focus{outline:none;border-color:var(--accent)}
.form-note{font-size:.82rem;color:var(--muted);margin-top:14px;text-align:center}
.form-success{text-align:center;padding:40px 20px}
.form-success .success-icon{font-size:3rem}
.form-success h3{font-size:1.5rem;margin:12px 0 8px}
.btn-outline{background:transparent;color:var(--accent-dark);border-color:var(--accent)}
.info-photo img{width:100%;aspect-ratio:16/10;object-fit:cover;margin-bottom:24px}
.contact-info h3{font-size:1.3rem;font-weight:800;margin-bottom:18px}
.ci{display:flex;gap:14px;margin-bottom:16px}
.ci .ci-ico{font-size:1.2rem}
.ci strong{display:block;font-size:.96rem}
.ci p{font-size:.9rem;color:var(--muted)}
.wa-btn{display:inline-flex;align-items:center;gap:10px;background:#25D366;color:#fff;font-weight:700;
  padding:13px 22px;border-radius:2px;margin-top:8px}

/* ── Footer ────────────────────────────────────────────── */
.footer{background:var(--ink);color:#cdbfb4;padding:70px 0 0}
.footer-inner{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand img{height:54px;border-radius:5px;background:#fff;padding:6px 10px;margin-bottom:16px}
.footer-brand p{font-size:.92rem;line-height:1.7}
.footer-brand .accc{color:var(--accent-soft);font-weight:700}
.social{display:flex;gap:12px;margin-top:18px;font-size:1.2rem}
.footer h4{color:#fff;font-size:1rem;margin-bottom:16px;letter-spacing:.02em}
.footer-links ul{list-style:none}
.footer-links li{margin:9px 0}
.footer-links a{font-size:.9rem;transition:color var(--t)}
.footer-links a:hover{color:var(--accent-soft)}
.footer-bottom{border-top:1px solid #3a2f29;margin-top:54px;padding:24px 0;font-size:.82rem;color:#9c8f86}
.footer-bottom p{margin:3px 0}

/* ── Responsive ────────────────────────────────────────── */
@media(max-width:1024px){
  .svc-grid{grid-template-columns:repeat(2,1fr)}
  .guias-grid,.tst-grid{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:40px}
  .contact-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media(max-width:760px){
  body{font-size:16px}
  .wrap{padding:0 22px}
  .utility{display:none}
  .nav-links{position:fixed;top:78px;left:0;right:0;background:#fff;flex-direction:column;align-items:flex-start;
    gap:0;padding:10px 22px;border-bottom:1px solid var(--line);transform:translateY(-140%);transition:transform var(--t)}
  .nav-links.open{transform:none}
  .nav-links a{width:100%;padding:14px 0;border-bottom:1px solid var(--line)}
  .nav-cta{display:none}
  .hamburger{display:flex}
  .section{padding:70px 0}
  .svc-grid,.reg-grid,.guias-grid,.tst-grid{grid-template-columns:1fr}
  .calc-grid,.form-row,.footer-inner{grid-template-columns:1fr}
  .hero h1{font-size:2.5rem}
  .hero-stats{flex-wrap:wrap;gap:18px}
}