/* ==========================================================================
   ESP — Petroleum Engineering Services
   Hoja de estilos única. Sin dependencias externas.
   ========================================================================== */

:root{
  /* Marca — azules oscuros tomados del logo */
  --brand:        #2f3080;
  --brand-700:    #26276b;
  --brand-600:    #3a3c99;
  --brand-400:    #5c5eb8;
  --brand-100:    #d9dcf0;
  --brand-050:    #eef0f9;

  /* Neutros */
  --ink:          #1c2030;
  --body:         #4a5265;
  --muted:        #79819a;
  --line:         #e3e6ef;
  --bg:           #ffffff;
  --bg-alt:       #f6f7fb;

  /* Apoyo */
  --ok:           #17805f;
  --warn:         #9a6b12;

  --radius:       14px;
  --radius-sm:    9px;
  --shadow:       0 1px 2px rgba(28,32,48,.06), 0 8px 24px rgba(28,32,48,.06);
  --shadow-lg:    0 2px 4px rgba(28,32,48,.06), 0 18px 48px rgba(28,32,48,.12);
  --maxw:         1160px;
  --header-h:     76px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth; scroll-padding-top:calc(var(--header-h) + 16px)}
body{
  margin:0; background:var(--bg); color:var(--body);
  font:16px/1.7 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%; display:block}
a{color:var(--brand-600)}

h1,h2,h3,h4{color:var(--ink); line-height:1.2; letter-spacing:-.022em; margin:0 0 .5em}
h1{font-size:clamp(2rem,4.4vw,3.25rem); font-weight:800}
h2{font-size:clamp(1.6rem,3vw,2.35rem); font-weight:750}
h3{font-size:1.16rem; font-weight:700; letter-spacing:-.012em}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}

.wrap{width:100%; max-width:var(--maxw); margin:0 auto; padding:0 24px}
.section{padding:88px 0}
.section--alt{background:var(--bg-alt); border-block:1px solid var(--line)}
.section--tight{padding:64px 0}

.eyebrow{
  display:inline-block; font-size:.75rem; font-weight:750; letter-spacing:.14em;
  text-transform:uppercase; color:var(--brand-600); margin:0 0 14px;
}
.section-head{max-width:62ch; margin-bottom:44px}
.section-head p{font-size:1.06rem; color:var(--body); margin:0}
.center{text-align:center; margin-inline:auto}

/* ---------- Botones ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:9px;
  padding:13px 24px; border-radius:var(--radius-sm); border:1.5px solid transparent;
  font-size:.95rem; font-weight:650; text-decoration:none; cursor:pointer;
  transition:background .16s ease, color .16s ease, border-color .16s ease, transform .16s ease;
  font-family:inherit; line-height:1.2;
}
.btn--primary{background:var(--brand); color:#fff; border-color:var(--brand)}
.btn--primary:hover{background:var(--brand-700); border-color:var(--brand-700)}
.btn--ghost{background:transparent; color:var(--brand-600); border-color:var(--brand-100)}
.btn--ghost:hover{background:var(--brand-050); border-color:var(--brand-400)}
.btn--light{background:#fff; color:var(--brand-700); border-color:#fff}
.btn--light:hover{background:var(--brand-050)}
.btn--outline-light{background:transparent; color:#fff; border-color:rgba(255,255,255,.45)}
.btn--outline-light:hover{background:rgba(255,255,255,.12); border-color:#fff}
.btn--sm{padding:9px 16px; font-size:.875rem}
.btn--block{width:100%}
.btn:disabled{opacity:.6; cursor:not-allowed}

/* ---------- Header ---------- */
.site-header{
  position:sticky; top:0; z-index:60; background:#fff;
  border-bottom:1px solid var(--line);
}
.site-header .wrap{
  display:flex; align-items:center; gap:24px;
  min-height:var(--header-h);
}
/* Logo. Para usar la imagen real: reemplaza el bloque .logo de cada HTML por
   <a class="logo" href="index.html"><img src="assets/logo.png" alt="ESP"></a> */
.logo{display:flex; align-items:center; gap:11px; text-decoration:none; flex:0 0 auto}
.logo img{height:44px; width:auto}
.logo__mark{
  width:44px; height:44px; flex:0 0 auto;
  color:var(--brand);
}
.logo__text{display:flex; flex-direction:column; line-height:1}
.logo__name{
  font-size:1.55rem; font-weight:800; color:var(--ink);
  letter-spacing:.13em; font-family:"Arial Narrow","Segoe UI",system-ui,sans-serif;
}
.logo__tag{
  font-size:.505rem; font-weight:700; color:var(--ink);
  letter-spacing:.135em; text-transform:uppercase; margin-top:4px;
}

.nav{margin-left:auto; display:flex; align-items:center; gap:4px}
.nav a:not(.btn){
  padding:9px 13px; border-radius:7px; text-decoration:none;
  color:var(--ink); font-size:.925rem; font-weight:550;
  transition:background .15s ease, color .15s ease; white-space:nowrap;
}
.nav a:not(.btn):hover{background:var(--brand-050); color:var(--brand-700)}
.nav a:not(.btn)[aria-current="page"]{color:var(--brand); font-weight:700}
.nav .btn{margin-left:10px}

.nav-toggle{
  display:none; margin-left:auto; width:44px; height:44px; padding:0;
  background:none; border:1px solid var(--line); border-radius:9px;
  cursor:pointer; align-items:center; justify-content:center; color:var(--ink);
}
.nav-toggle svg{width:22px; height:22px}

@media (max-width:900px){
  .nav-toggle{display:flex}
  .nav{
    position:absolute; left:0; right:0; top:100%;
    flex-direction:column; align-items:stretch; gap:2px;
    background:#fff; border-bottom:1px solid var(--line);
    padding:12px 24px 20px; margin:0;
    box-shadow:var(--shadow); display:none;
  }
  .nav.is-open{display:flex}
  .nav a:not(.btn){padding:12px 10px; font-size:1rem}
  .nav .btn{margin:8px 0 0}
}

/* ---------- Hero ---------- */
.hero{
  position:relative; color:#fff; overflow:hidden;
  background:
    radial-gradient(1100px 560px at 78% -10%, rgba(92,94,184,.55), transparent 62%),
    linear-gradient(152deg, #1a1b52 0%, var(--brand) 46%, #3f41a4 100%);
}
.hero::after{
  content:""; position:absolute; inset:0; pointer-events:none; opacity:.5;
  background-image:
    linear-gradient(rgba(255,255,255,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.055) 1px, transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(900px 480px at 25% 45%, #000, transparent 78%);
}
.hero .wrap{position:relative; z-index:1}
.hero--home{padding:110px 0 118px}
.hero--page{padding:74px 0 66px}
.hero h1{color:#fff; max-width:19ch}
.hero--page h1{max-width:24ch; font-size:clamp(1.9rem,3.6vw,2.8rem)}
.hero__lead{
  font-size:1.14rem; color:rgba(255,255,255,.9);
  max-width:60ch; margin:18px 0 0;
}
.hero__actions{display:flex; flex-wrap:wrap; gap:13px; margin-top:34px}
.hero .eyebrow{color:var(--brand-100)}

.crumbs{font-size:.85rem; color:rgba(255,255,255,.72); margin-bottom:16px}
.crumbs a{color:rgba(255,255,255,.9); text-decoration:none}
.crumbs a:hover{text-decoration:underline}

/* ---------- Franja de credibilidad ---------- */
.stats{
  display:grid; grid-template-columns:repeat(auto-fit,minmax(180px,1fr)); gap:1px;
  background:var(--line); border:1px solid var(--line); border-radius:var(--radius);
  overflow:hidden;
}
.stat{background:#fff; padding:28px 24px}
.stat b{display:block; font-size:1.9rem; font-weight:800; color:var(--brand); line-height:1.1}
.stat span{display:block; font-size:.9rem; color:var(--muted); margin-top:7px}

/* ---------- Rejillas y tarjetas ---------- */
.grid{display:grid; gap:22px}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(285px,1fr))}
.grid--4{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}

.card{
  background:#fff; border:1px solid var(--line); border-radius:var(--radius);
  padding:30px 28px; transition:border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}
.card--hover:hover{border-color:var(--brand-100); box-shadow:var(--shadow-lg); transform:translateY(-3px)}
.card h3{margin-bottom:10px}
.card p{font-size:.955rem; margin:0}
.card__icon{
  width:46px; height:46px; border-radius:11px; margin-bottom:18px;
  background:var(--brand-050); color:var(--brand);
  display:grid; place-items:center;
}
.card__icon svg{width:23px; height:23px}

.list-check{list-style:none; margin:16px 0 0; padding:0; display:grid; gap:10px}
.list-check li{position:relative; padding-left:28px; font-size:.955rem}
.list-check li::before{
  content:""; position:absolute; left:0; top:.5em; width:16px; height:16px;
  border-radius:50%; background:var(--brand-050);
  box-shadow:inset 0 0 0 1.5px var(--brand-400);
}
.list-check li::after{
  content:""; position:absolute; left:5px; top:calc(.5em + 5px);
  width:6px; height:3px; border-left:1.8px solid var(--brand); border-bottom:1.8px solid var(--brand);
  transform:rotate(-45deg);
}

/* ---------- Catálogo de equipos ---------- */
.filters{
  display:flex; flex-wrap:wrap; gap:20px; align-items:center;
  padding:18px 20px; background:#fff; border:1px solid var(--line);
  border-radius:var(--radius); margin-bottom:30px;
}
.filters__chips{display:flex; flex-wrap:wrap; gap:8px}
.chip{
  padding:8px 15px; border-radius:999px; border:1px solid var(--line);
  background:#fff; color:var(--body); font-size:.875rem; font-weight:600;
  cursor:pointer; font-family:inherit; transition:all .15s ease; white-space:nowrap;
}
.chip:hover{border-color:var(--brand-400); color:var(--brand-700)}
.chip[aria-pressed="true"]{background:var(--brand); border-color:var(--brand); color:#fff}
.filters__search{margin-left:auto; position:relative; min-width:230px; flex:0 1 300px}
.filters__search input{
  width:100%; padding:11px 14px 11px 40px; font:inherit; font-size:.925rem;
  border:1px solid var(--line); border-radius:var(--radius-sm); background:var(--bg-alt);
  color:var(--ink);
}
.filters__search input:focus{outline:2px solid var(--brand-400); outline-offset:1px; background:#fff}
.filters__search svg{
  position:absolute; left:13px; top:50%; transform:translateY(-50%);
  width:17px; height:17px; color:var(--muted); pointer-events:none;
}
@media (max-width:700px){ .filters__search{margin-left:0; flex-basis:100%} }

.equipo{
  display:flex; flex-direction:column; overflow:hidden; padding:0;
}
.equipo__media{
  aspect-ratio:4/3; background:var(--brand-050); position:relative;
  display:grid; place-items:center; border-bottom:1px solid var(--line);
}
.equipo__media img{width:100%; height:100%; object-fit:cover}
.equipo__media .ph{color:var(--brand-400); opacity:.5}
.equipo__media .ph svg{width:60px; height:60px}
.equipo__body{padding:24px 24px 26px; display:flex; flex-direction:column; flex:1}
.equipo__cat{
  font-size:.7rem; font-weight:750; letter-spacing:.1em; text-transform:uppercase;
  color:var(--brand-600); margin-bottom:9px;
}
.equipo h3{font-size:1.08rem; margin-bottom:9px}
.equipo__desc{font-size:.925rem; color:var(--body); margin:0 0 16px}
.specs{list-style:none; margin:0 0 20px; padding:0; display:grid; gap:7px; font-size:.875rem}
.specs li{display:flex; justify-content:space-between; gap:14px; border-bottom:1px dashed var(--line); padding-bottom:7px}
.specs li:last-child{border-bottom:0; padding-bottom:0}
.specs .k{color:var(--muted)}
.specs .v{color:var(--ink); font-weight:650; text-align:right}
.equipo__foot{margin-top:auto; display:flex; align-items:center; gap:12px; flex-wrap:wrap}
.equipo__foot .btn{white-space:nowrap}
.tag{
  font-size:.72rem; font-weight:700; padding:4px 10px; border-radius:999px;
  letter-spacing:.03em; white-space:nowrap;
}
.tag--ok{background:#e6f4ef; color:var(--ok)}
.tag--warn{background:#fbf2e0; color:var(--warn)}
.equipo__foot .btn{margin-left:auto}

.empty{
  text-align:center; padding:64px 24px; color:var(--muted);
  border:1px dashed var(--line); border-radius:var(--radius); background:var(--bg-alt);
}

/* ---------- Bloque partido ---------- */
.split{display:grid; grid-template-columns:1fr 1fr; gap:56px; align-items:center}
@media (max-width:860px){ .split{grid-template-columns:1fr; gap:36px} }
.panel{
  background:linear-gradient(150deg, var(--brand-700), var(--brand) 55%, var(--brand-600));
  color:#fff; border-radius:var(--radius); padding:44px 40px;
}
.panel h3{color:#fff}
.panel p{color:rgba(255,255,255,.88)}
.panel .list-check li::before{background:rgba(255,255,255,.16); box-shadow:inset 0 0 0 1.5px rgba(255,255,255,.5)}
.panel .list-check li::after{border-color:#fff}

/* ---------- Valores / HSE ---------- */
.value{display:flex; gap:16px; align-items:flex-start}
.value__num{
  flex:0 0 auto; width:34px; height:34px; border-radius:9px;
  background:var(--brand); color:#fff; display:grid; place-items:center;
  font-weight:750; font-size:.875rem;
}
.value h3{font-size:1.02rem; margin-bottom:6px}
.value p{font-size:.93rem; margin:0}

/* ---------- CTA ---------- */
.cta{
  background:linear-gradient(150deg, #1a1b52, var(--brand) 58%, #3f41a4);
  color:#fff; text-align:center; padding:78px 0;
}
.cta h2{color:#fff; margin-bottom:14px}
.cta p{color:rgba(255,255,255,.88); max-width:56ch; margin:0 auto 30px; font-size:1.06rem}
.cta__actions{display:flex; gap:13px; justify-content:center; flex-wrap:wrap}

/* ---------- Formulario ---------- */
.form-layout{display:grid; grid-template-columns:1.35fr .85fr; gap:52px; align-items:start}
@media (max-width:880px){ .form-layout{grid-template-columns:1fr; gap:36px} }

.form{display:grid; gap:19px}
.field{display:grid; gap:7px}
.field--row{grid-template-columns:1fr 1fr; gap:19px; display:grid}
@media (max-width:560px){ .field--row{grid-template-columns:1fr} }
.field label{font-size:.875rem; font-weight:650; color:var(--ink)}
.field .req{color:#c0392b}
.field input,.field select,.field textarea{
  width:100%; padding:12px 14px; font:inherit; font-size:.95rem; color:var(--ink);
  background:#fff; border:1px solid var(--line); border-radius:var(--radius-sm);
}
.field textarea{min-height:132px; resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:2px solid var(--brand-400); outline-offset:1px; border-color:var(--brand-400);
}
.field .hint{font-size:.8rem; color:var(--muted)}
.form__note{font-size:.82rem; color:var(--muted); margin:0}
.hp{position:absolute; left:-9999px; width:1px; height:1px; overflow:hidden}

.form-status{
  padding:14px 18px; border-radius:var(--radius-sm); font-size:.92rem;
  display:none; border:1px solid transparent;
}
.form-status.is-visible{display:block}
.form-status--ok{background:#e6f4ef; border-color:#bfe3d6; color:var(--ok)}
.form-status--err{background:#fbeaea; border-color:#f0cccc; color:#9a2c2c}
.form-status--info{background:var(--brand-050); border-color:var(--brand-100); color:var(--brand-700)}

.contact-aside{
  background:var(--bg-alt); border:1px solid var(--line);
  border-radius:var(--radius); padding:32px 30px;
}
.contact-aside h3{font-size:1.05rem}
.contact-item{display:flex; gap:13px; padding:15px 0; border-bottom:1px solid var(--line)}
.contact-item:last-child{border-bottom:0; padding-bottom:0}
.contact-item svg{width:19px; height:19px; color:var(--brand); flex:0 0 auto; margin-top:3px}
.contact-item .k{font-size:.76rem; font-weight:700; letter-spacing:.07em; text-transform:uppercase; color:var(--muted); margin-bottom:3px}
.contact-item .v{font-size:.95rem; color:var(--ink); font-weight:600; word-break:break-word}
.contact-item a{color:var(--brand-600); text-decoration:none}
.contact-item a:hover{text-decoration:underline}

/* ---------- Footer ---------- */
.site-footer{background:#151735; color:rgba(255,255,255,.66); padding:64px 0 0; font-size:.925rem}
.footer-grid{
  display:grid; grid-template-columns:1.6fr 1fr 1fr 1.2fr; gap:40px; padding-bottom:48px;
}
@media (max-width:880px){ .footer-grid{grid-template-columns:1fr 1fr; gap:34px} }
@media (max-width:520px){ .footer-grid{grid-template-columns:1fr} }
.site-footer h4{
  color:#fff; font-size:.78rem; font-weight:750; letter-spacing:.12em;
  text-transform:uppercase; margin:0 0 17px;
}
.site-footer ul{list-style:none; margin:0; padding:0; display:grid; gap:11px}
.site-footer a{color:rgba(255,255,255,.66); text-decoration:none}
.site-footer a:hover{color:#fff}
.site-footer p{margin:0 0 14px; max-width:38ch}
.footer-logo .logo__name,.footer-logo .logo__tag{color:#fff}
.footer-logo .logo__mark{color:var(--brand-400)}
.footer-logo{margin-bottom:20px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1); padding:22px 0 30px;
  display:flex; justify-content:space-between; gap:16px; flex-wrap:wrap; font-size:.85rem;
}

/* ---------- Utilidades ---------- */
.sr-only{
  position:absolute; width:1px; height:1px; padding:0; margin:-1px;
  overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0;
}
.skip-link{
  position:absolute; left:-9999px; z-index:100; padding:12px 20px;
  background:var(--brand); color:#fff; border-radius:0 0 8px 0; text-decoration:none;
}
.skip-link:focus{left:0; top:0}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important; transition-duration:.01ms !important}
  html{scroll-behavior:auto}
}