/* ============================================================
   TOKENS — Estudio Álvarez y Asociados (Design System v1.0)
   ============================================================ */
:root{
  --blue-900:#1E2D6B; --blue-800:#24377A; --blue-700:#314895; --blue-600:#3E5AA8;
  --olive-700:#8F9560; --olive-600:#AEB178; --olive-500:#B7BB84; --olive-300:#D9DAB8;
  --cream-100:#F7F6F1; --cream-200:#EFEDE6; --cream-300:#E3E0D4;
  --white:#FFFFFF; --ink:#202033;
  --text-primary:#202033; --text-secondary:#55586A; --text-tertiary:#858898;
  --border:rgba(30,45,107,.12);

  --font-display:'Cormorant Garamond', Georgia, serif;
  --font-serif:'Libre Baskerville', Georgia, serif;
  --font-body:'IBM Plex Sans', system-ui, sans-serif;

  --space-4:16px; --space-5:24px; --space-6:32px; --space-7:48px; --space-8:64px; --space-9:96px;
  --radius-sm:4px; --radius-md:8px; --radius-lg:14px; --radius-xl:22px; --radius-full:9999px;

  --shadow-sm:0 2px 8px rgba(30,45,107,.08);
  --shadow-md:0 10px 28px rgba(30,45,107,.13);
  --shadow-lg:0 18px 48px rgba(30,45,107,.18);
  --shadow-olive:0 0 28px rgba(174,177,120,.30);

  --gradient-blue:linear-gradient(180deg,var(--blue-700) 0%,var(--blue-900) 100%);
  --nav-h:80px;
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{
  font-family:var(--font-body);
  color:var(--text-primary);
  background:var(--cream-100);
  line-height:1.65;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}

.container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%}
.section{padding:var(--space-9) 0}

/* Section heads */
.eyebrow{
  display:inline-block;font-family:var(--font-body);font-size:12px;font-weight:600;
  letter-spacing:.18em;text-transform:uppercase;color:var(--olive-700);margin-bottom:14px;
}
.eyebrow.on-dark{color:var(--olive-500)}
.h2{font-family:var(--font-display);font-weight:700;font-size:clamp(32px,5vw,46px);line-height:1.05;letter-spacing:-.5px;color:var(--blue-900)}
.h2.on-dark{color:#fff}
.lead{font-family:var(--font-serif);font-size:clamp(15px,2.2vw,18px);line-height:1.8;color:var(--text-secondary);max-width:620px}
.lead.on-dark{color:rgba(255,255,255,.82)}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 26px;border-radius:var(--radius-md);font-family:var(--font-body);
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:transform .2s ease, background .2s ease, color .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.btn:hover{transform:translateY(-3px)}
.btn svg{width:18px;height:18px;flex-shrink:0}
.btn-olive{background:var(--olive-600);color:var(--blue-900)}
.btn-olive:hover{background:var(--olive-500);box-shadow:var(--shadow-olive)}
.btn-blue{background:var(--blue-800);color:#fff}
.btn-blue:hover{background:var(--blue-900);box-shadow:var(--shadow-md)}
.btn-outline{background:transparent;color:var(--blue-900);border:1.5px solid var(--olive-600)}
.btn-outline:hover{background:rgba(174,177,120,.16)}
.btn-outline-white{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.6)}
.btn-outline-white:hover{background:rgba(255,255,255,.10);border-color:#fff}

/* ============================================================
   NAVBAR (sticky/fixed overlay → solid Blue 900 on scroll)
   ============================================================ */
.navbar{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:transparent;
  transition:background .4s ease, box-shadow .4s ease, padding .3s ease;
}
.navbar.scrolled{background:linear-gradient(135deg,#B7BB84,#24377A);box-shadow:0 10px 34px rgba(30,45,107,.30)}
.nav-inner{
  max-width:1200px;margin:0 auto;padding:18px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  transition:padding .3s ease;
}
.navbar.scrolled .nav-inner{padding:12px 24px}
.brand{display:flex;align-items:center;flex-shrink:0}
.brand-logo{height:60px;width:auto;transition:height .3s ease}
.navbar.scrolled .brand-logo{height:50px}

.nav-links{display:flex;align-items:center;gap:30px}
.nav-links a{
  color:rgba(255,255,255,.86);font-size:15px;font-weight:500;position:relative;padding:4px 0;
  transition:color .2s ease;
}
.nav-links a:hover{color:#fff}
.nav-links a::after{content:'';position:absolute;left:0;bottom:-3px;height:2px;width:0;background:var(--olive-500);transition:width .25s ease}
.nav-links a:hover::after{width:100%}

.nav-actions{display:flex;align-items:center;gap:14px}
.nav-toggle{display:none;flex-direction:column;gap:5px;padding:8px}
.nav-toggle span{width:24px;height:2px;background:#fff;border-radius:2px;transition:.3s}
.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 — staggered entrance (HTML5UP Spectral inspired)
   ============================================================ */
.hero{
  position:relative;min-height:100vh;
  background:var(--blue-900) url('https://images.unsplash.com/photo-1486406146926-c627a92ad1ab?w=1600&q=80') center/cover no-repeat;
  display:flex;align-items:center;justify-content:center;text-align:center;
  padding:calc(var(--nav-h) + 18px) 24px 48px;overflow:hidden;
}
.hero::before{ /* velo azul sobre la foto + viñeteado + glow oliva detrás del logo */
  content:'';position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(ellipse 55% 45% at 50% 40%, rgba(183,187,132,.16), transparent 62%),
    radial-gradient(ellipse at center, rgba(20,28,71,.66) 35%, rgba(13,20,52,.90) 100%),
    linear-gradient(180deg, rgba(30,45,107,.45), rgba(20,28,71,.55));
}
.hero::after{ /* faint editorial grid */
  content:'';position:absolute;inset:0;opacity:.5;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);
  background-size:48px 48px;
  mask-image:radial-gradient(ellipse at center, #000 30%, transparent 75%);
}
.hero-inner{position:relative;z-index:2;display:flex;flex-direction:column;align-items:center;max-width:880px}

.hero-line{
  height:2px;width:0;background:var(--olive-500);border-radius:2px;
  opacity:0;animation:lineGrow 1s ease forwards;
}
.hero-line-top{animation-delay:.15s}
.hero-line-bottom{animation-delay:.45s}

.hero-logo{
  width:min(250px,52vw);height:auto;filter:brightness(0) invert(1);
  opacity:0;transform:scale(.82);animation:scaleFade 1s cubic-bezier(.2,.7,.3,1) forwards;animation-delay:.8s;
}
.hero-claim{
  font-family:var(--font-display);font-weight:700;color:#fff;
  font-size:clamp(32px,5.2vw,54px);line-height:1.05;letter-spacing:-.6px;margin-top:28px;
  opacity:0;transform:translateY(28px);animation:slideUpFade .9s ease forwards;animation-delay:1.2s;
}
.hero-subcopy{
  font-family:var(--font-serif);color:rgba(255,255,255,.85);
  font-size:clamp(15px,2.2vw,18px);line-height:1.7;margin-top:18px;max-width:58ch;
  opacity:0;transform:translateY(28px);animation:slideUpFade .9s ease forwards;animation-delay:1.6s;
}
.hero-cta{
  display:flex;flex-wrap:wrap;gap:16px;justify-content:center;margin-top:30px;
  opacity:0;transform:translateY(28px);animation:slideUpFade .9s ease forwards;animation-delay:2s;
}
.hero-scroll{
  position:absolute;bottom:26px;left:50%;transform:translateX(-50%);z-index:2;
  color:rgba(255,255,255,.5);font-size:22px;opacity:0;animation:fadeIn 1s ease forwards;animation-delay:2.5s;
}
.hero-scroll span{display:block;animation:bob 2s ease-in-out infinite}

/* fill-mode:both is set via "forwards" + initial opacity:0 to prevent flashing */
@keyframes lineGrow{from{opacity:0;width:0}to{opacity:1;width:120px}}
@keyframes scaleFade{from{opacity:0;transform:scale(.82)}to{opacity:1;transform:scale(1)}}
@keyframes slideUpFade{from{opacity:0;transform:translateY(28px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(7px)}}

/* ============================================================
   SLIDER DE SERVICIOS (CLM Controller inspired, parallax)
   ============================================================ */
.slider-section{position:relative}
.slider{position:relative;height:min(78vh,600px);min-height:460px;overflow:hidden}
.slide{
  position:absolute;inset:0;opacity:0;visibility:hidden;
  transition:opacity 1s ease, visibility 1s ease;
  display:flex;align-items:center;
  background-size:cover;background-position:center;background-attachment:fixed;
}
.slide.active{opacity:1;visibility:visible}
.slide::before{ /* Blue 900 overlay 70% */
  content:'';position:absolute;inset:0;
  background:linear-gradient(90deg, rgba(30,45,107,.86) 0%, rgba(30,45,107,.66) 100%);
}
.slide-content{
  position:relative;z-index:2;max-width:1200px;width:100%;margin:0 auto;padding:0 24px;color:#fff;
}
.slide-inner{max-width:640px}
.slide.active .slide-inner > *{opacity:0;transform:translateY(24px);animation:slideUpFade .8s ease forwards}
.slide.active .slide-inner > *:nth-child(1){animation-delay:.15s}
.slide.active .slide-inner > *:nth-child(2){animation-delay:.30s}
.slide.active .slide-inner > *:nth-child(3){animation-delay:.45s}
.slide-badge{
  display:inline-block;background:var(--olive-600);color:var(--blue-900);
  font-size:12px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  padding:6px 14px;border-radius:var(--radius-full);margin-bottom:18px;
}
.slide-title{font-family:var(--font-display);font-weight:700;font-size:clamp(34px,5.5vw,58px);line-height:1.04;letter-spacing:-.5px;margin-bottom:14px}
.slide-desc{font-family:var(--font-serif);font-size:clamp(15px,2.2vw,19px);line-height:1.7;color:rgba(255,255,255,.86);max-width:48ch}

.slider-arrow{
  position:absolute;top:50%;transform:translateY(-50%);z-index:5;
  width:52px;height:52px;border-radius:50%;
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.35);
  color:#fff;font-size:24px;line-height:1;display:flex;align-items:center;justify-content:center;
  backdrop-filter:blur(6px);transition:background .2s ease, transform .2s ease;
}
.slider-arrow:hover{background:var(--olive-600);color:var(--blue-900);border-color:var(--olive-600)}
.slider-arrow.prev{left:22px}
.slider-arrow.next{right:22px}
.slider-arrow:hover{transform:translateY(-50%) scale(1.06)}

.slider-dots{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);z-index:5;display:flex;gap:10px}
.dot{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.4);transition:background .25s ease, transform .25s ease}
.dot.active{background:var(--olive-500);transform:scale(1.25)}

/* ============================================================
   MÉTRICAS (Cream 100, animated counters)
   ============================================================ */
.metrics{background:var(--cream-100)}
.metrics-grid{display:grid;grid-template-columns:1fr;gap:40px;text-align:center}
.metric-num{font-family:var(--font-display);font-weight:700;font-size:clamp(58px,9vw,92px);line-height:1;color:var(--blue-900)}
.metric-num .accent{color:var(--olive-700)}
.metric-label{font-family:var(--font-serif);font-size:16px;color:var(--text-secondary);margin-top:10px;max-width:24ch;margin-left:auto;margin-right:auto}
.metric-rule{width:46px;height:3px;background:var(--olive-600);border-radius:3px;margin:18px auto 0}

/* ============================================================
   SERVICIOS DETALLADOS (alternating, slide-in on view)
   ============================================================ */
.services-detailed{background:var(--white)}
.services-head{text-align:center;max-width:680px;margin:0 auto var(--space-9)}
.services-head .lead{margin:0 auto}
.svc-row{
  display:grid;grid-template-columns:1fr;gap:36px;align-items:center;
  padding:46px 0;border-bottom:1px solid var(--border);
}
.svc-row:last-child{border-bottom:none}
.svc-media{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md);aspect-ratio:4/3}
.svc-media img{width:100%;height:100%;object-fit:cover;transition:transform .8s ease}
.svc-row:hover .svc-media img{transform:scale(1.05)}
.svc-media::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,transparent 55%,rgba(30,45,107,.20))}
.svc-text .eyebrow{margin-bottom:10px}
.svc-text h3{font-family:var(--font-display);font-weight:700;font-size:clamp(28px,3.6vw,38px);line-height:1.08;color:var(--blue-900);margin-bottom:18px}
.svc-list{display:flex;flex-direction:column;gap:11px;margin-bottom:26px}
.svc-list li{position:relative;padding-left:26px;color:var(--text-secondary);font-size:15.5px;line-height:1.55}
.svc-list li::before{content:'';position:absolute;left:0;top:9px;width:9px;height:9px;border-radius:50%;background:var(--olive-600)}

/* slide-in animation: media from outside, text from inside */
.svc-media,.svc-text{opacity:0;transition:opacity .9s ease, transform .9s ease}
.svc-media{transform:translateX(-60px)}
.svc-text{transform:translateX(60px)}
.svc-row.reverse .svc-media{transform:translateX(60px)}
.svc-row.reverse .svc-text{transform:translateX(-60px)}
.svc-row.visible .svc-media,.svc-row.visible .svc-text{opacity:1;transform:translateX(0)}

/* ============================================================
   QUIÉNES SOMOS (Blue 900)
   ============================================================ */
.about{background:linear-gradient(135deg,#B7BB84,#24377A);color:#fff}
.about-grid{display:grid;grid-template-columns:1fr;gap:48px;align-items:start}
.about-intro p{font-family:var(--font-serif);font-size:clamp(16px,2.4vw,20px);line-height:1.85;color:rgba(255,255,255,.88);margin-top:22px}
.about-blocks{display:flex;flex-direction:column;gap:24px}
.vmv{
  border-left:3px solid var(--olive-600);padding:6px 0 6px 22px;
  transition:transform .2s ease;
}
.vmv:hover{transform:translateX(4px)}
.vmv h4{font-family:var(--font-display);font-size:24px;font-weight:700;color:var(--olive-500);margin-bottom:6px}
.vmv p{color:rgba(255,255,255,.82);font-size:15.5px;line-height:1.65}

/* ============================================================
   CONTACTO (Cream 100)
   ============================================================ */
.contact{background:var(--cream-100)}
.contact-grid{display:grid;grid-template-columns:1fr;gap:48px;align-items:start}
.contact-form{background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;box-shadow:var(--shadow-sm)}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:18px}
.field label{font-size:13px;font-weight:600;color:var(--text-secondary)}
.field input,.field select,.field textarea{
  width:100%;background:#fff;border:1px solid var(--border);border-radius:var(--radius-md);
  padding:12px 14px;font-family:var(--font-body);font-size:15px;color:var(--text-primary);
  transition:border-color .2s ease, box-shadow .2s ease;outline:none;
}
.field textarea{resize:vertical;min-height:120px}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--olive-600);box-shadow:0 0 0 4px rgba(183,187,132,.22)}
.field .err{font-size:12px;color:#A33D3D;display:none}
.field.invalid input,.field.invalid select,.field.invalid textarea{border-color:#A33D3D}
.field.invalid .err{display:block}
.form-note{font-size:12.5px;color:var(--text-tertiary);margin-top:6px}

.contact-info h3{font-family:var(--font-display);font-size:clamp(26px,3.4vw,34px);font-weight:700;color:var(--blue-900);margin-bottom:8px}
.info-list{display:flex;flex-direction:column;gap:6px;margin:24px 0 28px}
.info-item{display:flex;gap:14px;align-items:flex-start;padding:14px 16px;border-radius:var(--radius-md);background:#fff;border:1px solid var(--border);transition:transform .2s ease, box-shadow .2s ease}
.info-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.info-icon{flex-shrink:0;width:42px;height:42px;border-radius:var(--radius-md);background:rgba(174,177,120,.18);color:var(--olive-700);display:flex;align-items:center;justify-content:center}
.info-icon svg{width:20px;height:20px}
.info-item .info-k{font-size:12px;color:var(--text-tertiary);letter-spacing:.04em}
.info-item .info-v{font-size:15.5px;font-weight:600;color:var(--blue-900)}
.info-item:hover .info-v{color:var(--blue-700)}

.socials{display:flex;gap:12px}
.social{
  width:46px;height:46px;border-radius:50%;background:var(--blue-900);color:#fff;
  display:flex;align-items:center;justify-content:center;transition:transform .2s ease, background .2s ease;
}
.social svg{width:20px;height:20px}
.social:hover{transform:translateY(-3px);background:var(--olive-600);color:var(--blue-900)}

/* ============================================================
   FOOTER (Ink)
   ============================================================ */
.footer{background:linear-gradient(135deg,#B7BB84,#24377A);color:rgba(255,255,255,.72);padding:56px 0 28px}
.footer-top{display:grid;grid-template-columns:1fr;gap:34px}
.footer-brand .brand-logo{height:78px;width:auto}
.footer-brand p{margin-top:16px;font-family:var(--font-serif);font-size:14px;line-height:1.7;max-width:34ch;color:rgba(255,255,255,.6)}
.footer-col h5{font-family:var(--font-body);font-size:13px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--olive-500);margin-bottom:16px}
.footer-col a{display:block;color:rgba(255,255,255,.72);font-size:14.5px;padding:5px 0;transition:color .2s ease}
.footer-col a:hover{color:#fff}
.footer-socials{display:flex;gap:12px;margin-top:6px}
.footer-socials .social{width:42px;height:42px;background:rgba(255,255,255,.08);display:flex;align-items:center;justify-content:center;padding:0}
.footer-socials .social:hover{background:var(--olive-600)}
.footer-sep{height:1px;background:var(--olive-700);opacity:.5;margin:34px 0 22px}
.footer-bottom{font-size:13px;color:rgba(255,255,255,.5);text-align:center}

/* ============================================================
   REVEAL ON SCROLL (IntersectionObserver utility)
   ============================================================ */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .8s ease, transform .8s ease}
.reveal.visible{opacity:1;transform:translateY(0)}
.d1{transition-delay:.1s}.d2{transition-delay:.2s}.d3{transition-delay:.3s}

/* WhatsApp floating button */
.wa-float{
  position:fixed;right:22px;bottom:22px;z-index:900;
  width:58px;height:58px;border-radius:50%;background:#25D366;color:#fff;
  display:flex;align-items:center;justify-content:center;box-shadow:0 12px 30px rgba(37,211,102,.4);
  transition:transform .2s ease;
}
.wa-float:hover{transform:scale(1.08)}
.wa-float svg{width:30px;height:30px}