/* =========================================================
   CALTEC SUMINISTROS — sistema de diseño
   Navy #07182D · Azul #039BE5 · Oro #CCA879
   Barlow Condensed (titulares) + Inter (texto)
   ========================================================= */

:root{
  --navy: #082846;
  --navy-2: #0F3355;
  --blue: #637D90;      /* secondary color (slate blue) */
  --blue-deep: #4F6779;
  --gold: #CDB185;      /* accent detail color (beige) — used sparingly */
  --gray-text: #303B43; /* body text (charcoal) */
  --gray-soft: #5B6670;
  --panel: #F4F4F4;
  --panel-2: #F0F0F0;
  --line: #E4E4E4;
  --white: #FFFFFF;
  --ivory: #F5F2EB;

  --max: 1180px;
  --radius: 4px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin:0;
  font-family: 'Inter', Arial, sans-serif;
  color: var(--navy);
  background: var(--white);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1,h2,h3,h4{
  font-family: 'Barlow Condensed', Arial Narrow, sans-serif;
  font-weight: 700;
  line-height: 1.05;
  margin: 0 0 .5em 0;
  color: var(--navy);
  letter-spacing: .2px;
}

h1{ font-size: clamp(2.4rem, 5vw, 3.6rem); font-weight: 800; }
h2{ font-size: clamp(1.8rem, 3.2vw, 2.5rem); }
h3{ font-size: 1.3rem; font-weight: 700; }

p{ margin: 0 0 1em 0; }
a{ color: var(--blue); text-decoration: none; }
a:hover{ color: var(--blue-deep); }
a:focus-visible, button:focus-visible{ outline: 3px solid var(--blue); outline-offset: 2px; }

img{ max-width: 100%; display: block; }

.wrap{
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
}

.eyebrow{
  color: var(--blue);
  font-weight: 600;
  font-size: .92rem;
  margin: 0 0 .4em 0;
}

.lede{
  color: var(--gray-text);
  font-size: 1.08rem;
  max-width: 62ch;
}

.rule-gold{
  width: 56px;
  height: 3px;
  background: var(--gold);
  border: 0;
  margin: 18px 0 28px 0;
}

/* ---------- Header / nav ---------- */
.site-header{
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--white);
  border-bottom: 1px solid var(--line);
}
.nav{
  display:flex;
  align-items:center;
  justify-content: space-between;
  padding: 14px 28px;
  max-width: var(--max);
  margin: 0 auto;
}
.nav .brand{ display:flex; align-items:center; }
.nav .brand img{ height: 50px; width:auto; }
.nav ul{
  list-style:none;
  display:flex;
  gap: 30px;
  margin:0; padding:0;
}
.nav a{
  color: var(--navy);
  font-weight: 600;
  font-size: .98rem;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
}
.nav a:hover{ color: var(--blue); }
.nav a.active{ color: var(--blue); border-bottom-color: var(--blue); }

.nav-toggle{
  display:none;
  background:none; border:0; cursor:pointer;
  width: 40px; height: 40px;
  position: relative;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after{
  content:"";
  position:absolute; left:8px; right:8px;
  height:2px; background: var(--navy);
}
.nav-toggle span{ top:19px; }
.nav-toggle span::before{ top:-7px; }
.nav-toggle span::after{ top:7px; }

/* ---------- Hero (home) ---------- */
.hero{
  position: relative;
  min-height: 560px;
  display:flex;
  align-items:center;
  background: linear-gradient(100deg, rgba(8,40,70,.94) 0%, rgba(8,40,70,.82) 38%, rgba(8,40,70,.35) 68%, rgba(8,40,70,.08) 100%), url('../img/hero-refineria.jpg') right center / cover no-repeat;
}
.hero .wrap{ padding-top: 70px; padding-bottom: 70px; }
.hero-content{ max-width: 620px; color: var(--white); }
.hero h1{ color: var(--white); }
.hero .lede{ color: #DCE3E8; font-size: 1.15rem; }

/* ---------- Page header (inner pages) ---------- */
.page-header{
  background: var(--navy);
  color: var(--white);
  padding: 64px 0 46px 0;
}
.page-header h1{ color: var(--white); margin-bottom:.2em; }
.page-header .lede{ color: #C3CDD4; }

/* ---------- Feature strip ---------- */
.feature-strip{
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}
.feature-grid{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.feature-item{
  display:flex;
  flex-direction: column;
  align-items:center;
  text-align:center;
  gap: 10px;
  padding: 30px 18px;
  border-left: 1px solid var(--line);
}
.feature-item:first-child{ border-left: 0; }
.feature-item img{ height: 40px; width:auto; }
.feature-item span{ font-weight: 600; font-size: .95rem; }

/* ---------- Sections ---------- */
section{ padding: 72px 0; }
section.alt{ background: var(--panel); }

.split{
  display:grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 56px;
  align-items:center;
}
.split img{ border-radius: var(--radius); width:100%; height:100%; object-fit:cover; }
.split.reverse{ direction: rtl; }
.split.reverse > *{ direction: ltr; }

/* ---------- Product teaser / grid ---------- */
.cards{
  display:grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}
.card{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--white);
  display:flex;
  flex-direction:column;
}
.card .thumb{
  background: var(--panel-2);
  aspect-ratio: 1 / 1;
  overflow:hidden;
}
.card .thumb img{ width:100%; height:100%; object-fit: contain; }
.card .label{
  background: var(--navy);
  color: var(--white);
  font-family:'Barlow Condensed', sans-serif;
  font-weight:700;
  font-size: 1.05rem;
  letter-spacing:.3px;
  text-align:center;
  padding: 10px 8px;
}
.card ul{
  margin:0; padding: 14px 18px 18px 18px;
  list-style:none;
  color: var(--gray-text);
  font-size: .92rem;
  flex:1;
}
.card ul li{ padding: 3px 0; border-bottom: 1px solid var(--line); }
.card ul li:last-child{ border-bottom:0; }
.card ul li::before{ content:"– "; color: var(--blue); }

.link-more{
  display:inline-block;
  margin-top: 30px;
  font-weight: 600;
  border-bottom: 2px solid var(--blue);
  padding-bottom: 2px;
}

/* ---------- Timeline (historia) ---------- */
.timeline{ max-width: 720px; }
.tl-item{
  display:grid;
  grid-template-columns: 64px 1fr;
  gap: 22px;
  position:relative;
  padding-bottom: 36px;
}
.tl-item:last-child{ padding-bottom:0; }
.tl-item::before{
  content:"";
  position:absolute;
  left:31px; top: 60px; bottom: 0;
  width:2px;
  background: var(--line);
}
.tl-item:last-child::before{ display:none; }
.tl-num{
  width:64px; height:64px;
  border-radius:50%;
  background: var(--navy);
  color: var(--gold);
  display:flex; align-items:center; justify-content:center;
  font-family:'Barlow Condensed', sans-serif;
  font-weight:800; font-size:1.5rem;
  flex-shrink:0;
}
.tl-body h3{ margin-bottom:.3em; }
.tl-body p{ color: var(--gray-text); margin:0; }

/* ---------- Process steps ---------- */
.steps{
  display:grid;
  grid-template-columns: repeat(3,1fr);
  gap: 30px;
}
.step .num{
  font-family:'Barlow Condensed', sans-serif;
  font-weight:800;
  font-size: 2.4rem;
  color: var(--gold);
  line-height:1;
  margin-bottom:.2em;
}
.step h3{ margin-bottom:.3em; }
.step p{ color: var(--gray-text); margin:0; }

/* ---------- Applications grid ---------- */
.apps{
  display:grid;
  grid-template-columns: repeat(5,1fr);
  gap: 24px;
}
.app-item{ text-align:center; }
.app-item img{ height:46px; margin: 0 auto 14px auto; }
.app-item h3{ font-size: 1.05rem; margin-bottom:.25em; }
.app-item p{ color: var(--gray-soft); font-size: .88rem; margin:0; }

/* ---------- Misión y Visión (home) ---------- */
.mission-vision{
  background: var(--navy);
  padding: 72px 0;
}
.mv-grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
}
.mv-title{
  color: var(--gold);
  margin-bottom: .5em;
}
.mv-text{
  color: #DCE3E8;
  margin: 0;
  font-size: 1.05rem;
  max-width: 46ch;
}

/* ---------- Contact ---------- */
.contact-card{
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 40px;
  display:grid;
  grid-template-columns: auto 1fr;
  gap: 40px;
  align-items:center;
  max-width: 780px;
}
.contact-card .logo-block img{ width: 150px; }
.contact-rows{ display:flex; flex-direction:column; gap: 18px; }
.contact-rows .row-label{
  font-size: .82rem;
  font-weight: 700;
  color: var(--blue);
  text-transform: uppercase;
  letter-spacing: .5px;
  margin-bottom: 2px;
}
.contact-rows .row-value{ font-size: 1.05rem; font-weight:500; }
.contact-name{ font-family:'Barlow Condensed', sans-serif; font-weight:700; font-size:1.6rem; margin-bottom: 18px; }
.contact-role{ color: var(--blue); font-weight:600; margin-bottom: 18px; font-size:.98rem; }

/* ---------- Footer ---------- */
.site-footer{
  background: var(--navy);
  color: #C3CDD4;
  padding: 46px 0 26px 0;
}
.footer-top{
  display:flex;
  justify-content: space-between;
  align-items:flex-start;
  flex-wrap: wrap;
  gap: 30px;
  padding-bottom: 30px;
  border-bottom: 1px solid rgba(255,255,255,.12);
}
.footer-top img{ height: 30px; margin-bottom: 12px; }
.footer-top p{ max-width: 320px; color: #A9B5BC; font-size: .92rem; margin:0; }
.footer-links{ display:flex; gap: 50px; flex-wrap:wrap; }
.footer-links h4{ color: var(--white); font-size: .95rem; margin-bottom: 10px; font-weight:700; letter-spacing:.3px; }
.footer-links a{ color: #A9B5BC; display:block; padding: 4px 0; font-size:.92rem; }
.footer-links a:hover{ color: var(--white); }
.footer-bottom{
  padding-top: 22px;
  font-size: .82rem;
  color: #8B969D;
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:10px;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px){
  .split{ grid-template-columns: 1fr; }
  .split.reverse{ direction: ltr; }
  .split img{ order:-1; max-height:320px; }
  .cards{ grid-template-columns: repeat(2,1fr); }
  .apps{ grid-template-columns: repeat(2,1fr); }
  .steps{ grid-template-columns: 1fr; }
  .feature-grid{ grid-template-columns: repeat(2,1fr); }
  .feature-item{ border-left:0; border-top:1px solid var(--line); }
  .feature-item:nth-child(1),.feature-item:nth-child(2){ border-top:0; }
  .mv-grid{ grid-template-columns: 1fr; gap: 36px; }
  .contact-card{ grid-template-columns: 1fr; text-align:center; }
  .contact-card .logo-block{ justify-self:center; }
  .contact-rows{ align-items:center; }
}

@media (max-width: 760px){
  .nav ul{
    position: fixed;
    top: 63px; left:0; right:0;
    background: var(--white);
    flex-direction: column;
    gap:0;
    padding: 6px 28px 16px 28px;
    border-bottom: 1px solid var(--line);
    transform: translateY(-130%);
    transition: transform .25s ease;
  }
  .nav ul.open{ transform: translateY(0); }
  .nav ul li{ border-top: 1px solid var(--line); }
  .nav ul li:first-child{ border-top:0; }
  .nav ul a{ display:block; padding: 12px 0; }
  .nav-toggle{ display:block; }
  .cards{ grid-template-columns: repeat(2,1fr); }
}

@media (max-width: 520px){
  .cards{ grid-template-columns: 1fr 1fr; }
  .apps{ grid-template-columns: 1fr; }
  .mission .wrap{ flex-direction:column; align-items:flex-start; }
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  .nav ul{ transition:none; }
}