/* ==========================================================================
   TMI — Tanques y Montajes Industriales S.A.S.
   Hoja de estilos principal
   ========================================================================== */

:root{
  --steel-900:#0c1c2c;
  --steel-800:#102a43;
  --steel-700:#16385a;
  --steel-600:#1d4d78;
  --steel-100:#e8eef4;
  --steel-50:#f5f8fb;
  --orange:#f26522;
  --orange-dark:#d4531a;
  --ink:#16212b;
  --muted:#5b6b7b;
  --line:#dfe6ee;
  --white:#ffffff;
  --radius:14px;
  --shadow-sm:0 2px 8px rgba(12,28,44,.08);
  --shadow-md:0 12px 32px rgba(12,28,44,.14);
  --shadow-lg:0 24px 60px rgba(12,28,44,.28);
  --maxw:1200px;
  --font-head:"Barlow Condensed",system-ui,sans-serif;
  --font-body:"Inter",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--font-body);color:var(--ink);
  background:var(--white);line-height:1.65;font-size:16px;
}
img{max-width:100%;display:block}
a{color:var(--steel-600);text-decoration:none}
a:hover{color:var(--orange)}
ul{margin:0;padding:0;list-style:none}

h1,h2,h3,h4{font-family:var(--font-head);letter-spacing:.01em;line-height:1.08;margin:0 0 .5em;text-transform:uppercase}
h1{font-size:clamp(2.4rem,6vw,4.4rem)}
h2{font-size:clamp(1.85rem,3.6vw,2.9rem);color:var(--steel-800)}
h3{font-size:1.3rem;color:var(--steel-800)}
p{margin:0 0 1rem}

.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:20px}

.skip-link{position:absolute;left:-9999px;top:0;background:var(--orange);color:#fff;padding:10px 16px;z-index:100}
.skip-link:focus{left:8px;top:8px}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;background:rgba(12,28,44,.94);
  backdrop-filter:blur(8px);border-bottom:1px solid rgba(255,255,255,.08);
}
.header-inner{
  display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;
  gap:16px;min-height:72px;
}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand img{width:44px;height:44px;object-fit:contain;flex-shrink:0}
.brand-text{display:flex;flex-direction:column;min-width:0}
.brand-text strong{
  font-family:var(--font-head);font-size:1.5rem;line-height:1;color:#fff;letter-spacing:.08em;
}
.brand-text small{font-size:.68rem;letter-spacing:.11em;text-transform:uppercase;color:#9fb6cc;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid rgba(255,255,255,.25);
  border-radius:10px;background:transparent;cursor:pointer;padding:11px 10px;flex-shrink:0;
}
.nav-toggle span{display:block;height:2px;background:#fff;margin:4px 0;transition:.25s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.site-nav ul{display:flex;align-items:center;gap:22px}
.site-nav a{
  color:#d8e3ee;font-size:.83rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em;
}
.site-nav a:hover{color:var(--orange)}
.nav-cta{
  background:var(--orange);color:#fff !important;padding:10px 18px;border-radius:8px;
}
.nav-cta:hover{background:var(--orange-dark)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 26px;border-radius:10px;font-weight:700;font-size:.9rem;
  text-transform:uppercase;letter-spacing:.06em;border:2px solid transparent;
  cursor:pointer;transition:transform .18s ease,background .18s ease,color .18s ease;
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover{background:var(--orange-dark);color:#fff}
.btn-ghost{border-color:rgba(255,255,255,.6);color:#fff}
.btn-ghost:hover{background:#fff;color:var(--steel-800)}
.btn-whatsapp{background:#25d366;color:#07301a;margin-top:8px}
.btn-whatsapp:hover{background:#1fb857;color:#07301a}
.btn-block{width:100%}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:min(88vh,760px);display:flex;align-items:center;overflow:hidden}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero-overlay{
  position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(8,20,32,.94) 0%,rgba(8,20,32,.82) 45%,rgba(8,20,32,.45) 100%);
}
.hero-content{position:relative;padding-block:clamp(64px,10vw,120px);color:#fff;max-width:920px}
.hero-content h1{color:#fff;text-shadow:0 4px 24px rgba(0,0,0,.35)}
.eyebrow{
  display:inline-block;font-size:.76rem;font-weight:700;letter-spacing:.18em;text-transform:uppercase;
  color:var(--orange);border-left:3px solid var(--orange);padding-left:12px;margin-bottom:18px;
}
.lead{font-size:clamp(1rem,1.6vw,1.18rem);color:#d6e2ee;max-width:660px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-stats{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:18px;
  margin-top:48px;padding-top:28px;border-top:1px solid rgba(255,255,255,.18);
}
.hero-stats li{display:flex;flex-direction:column}
.hero-stats strong{font-family:var(--font-head);font-size:1.9rem;color:#fff;line-height:1}
.hero-stats span{font-size:.78rem;text-transform:uppercase;letter-spacing:.1em;color:#9fb6cc;margin-top:6px}

/* ---------- Strip ---------- */
.strip{background:var(--steel-800);color:#cfdcea;padding:18px 0}
.strip-inner{display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px}
.strip-inner > span{font-size:.76rem;letter-spacing:.14em;text-transform:uppercase;color:var(--orange);font-weight:700}
.strip-inner ul{display:flex;flex-wrap:wrap;gap:10px 22px}
.strip-inner li{font-size:.86rem;position:relative;padding-left:16px}
.strip-inner li::before{content:"";position:absolute;left:0;top:.6em;width:6px;height:6px;background:var(--orange);border-radius:2px}

/* ---------- Sections ---------- */
.section{padding:clamp(56px,8vw,104px) 0}
.section-alt{background:var(--steel-50)}
.section-dark{background:var(--steel-900);color:#cfdcea}
.section-dark h2,.section-dark h3{color:#fff}
.section-dark .section-sub{color:#9fb6cc}

.section-eyebrow{
  font-size:.76rem;font-weight:700;letter-spacing:.18em;text-transform:uppercase;
  color:var(--orange);margin-bottom:10px;
}
.section-head{max-width:760px;margin-bottom:44px}
.section-sub{color:var(--muted);font-size:1.03rem}

.grid-2{display:grid;align-items:start;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:clamp(28px,4vw,56px)}
.align-center{align-items:center}

.figure{margin:0;border-radius:var(--radius);overflow:hidden;background:#fff;box-shadow:var(--shadow-md)}
.figure img{width:100%;height:100%;max-height:460px;object-fit:cover}
.figure-plan img{object-fit:contain;background:#fff;padding:10px;max-height:380px}
.figure figcaption{padding:14px 18px;font-size:.88rem;color:var(--muted);background:#fff;border-top:3px solid var(--orange)}

.check-list{margin-top:20px;display:grid;gap:10px}
.check-list li{position:relative;padding-left:30px;font-weight:500}
.check-list li::before{
  content:"✓";position:absolute;left:0;top:0;width:20px;height:20px;border-radius:50%;
  background:var(--orange);color:#fff;font-size:.72rem;display:grid;place-items:center;margin-top:4px;
}

/* Cards / lists */
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:clamp(22px,3vw,34px);box-shadow:var(--shadow-sm)}
.card-list h3{border-bottom:2px solid var(--orange);padding-bottom:10px;margin-bottom:18px;display:inline-block}
.two-col{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:8px 24px}
.two-col li{position:relative;padding-left:18px;font-size:.95rem}
.two-col li::before{content:"";position:absolute;left:0;top:.62em;width:7px;height:7px;background:var(--steel-600);border-radius:2px}

/* Services */
.services-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px}
.service{
  background:#fff;border:1px solid var(--line);border-left:4px solid var(--orange);
  border-radius:12px;padding:24px;box-shadow:var(--shadow-sm);transition:transform .2s ease,box-shadow .2s ease;
}
.service:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.service h3{font-size:1.12rem;margin-bottom:8px}
.service p{margin:0;color:var(--muted);font-size:.93rem}

/* ---------- Gallery ---------- */
.filters{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px}
.filter{
  background:transparent;border:1px solid rgba(255,255,255,.25);color:#cfdcea;
  padding:9px 18px;border-radius:999px;font-size:.8rem;font-weight:600;letter-spacing:.05em;
  text-transform:uppercase;cursor:pointer;transition:.2s;
}
.filter:hover{border-color:var(--orange);color:#fff}
.filter.is-active{background:var(--orange);border-color:var(--orange);color:#fff}

.gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:22px}
.shot{
  margin:0;background:#0f2436;border:1px solid rgba(255,255,255,.08);border-radius:var(--radius);
  overflow:hidden;display:flex;flex-direction:column;cursor:zoom-in;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.shot:hover{transform:translateY(-4px);border-color:var(--orange);box-shadow:var(--shadow-lg)}
.shot img,.shot video{width:100%;height:230px;object-fit:cover;display:block;background:#000}
.shot figcaption{padding:16px 18px;display:flex;flex-direction:column;gap:6px}
.shot figcaption strong{font-family:var(--font-head);font-size:1.12rem;color:#fff;text-transform:uppercase;letter-spacing:.02em}
.shot figcaption span{font-size:.88rem;color:#a9bccf}
.shot figcaption em{
  font-style:normal;font-size:.74rem;letter-spacing:.09em;text-transform:uppercase;
  color:var(--orange);font-weight:700;margin-top:2px;
}
.shot.is-hidden{display:none}

/* ---------- Logos ---------- */
.logos{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:16px}
.logos li{
  background:#fff;border:1px solid var(--line);border-radius:12px;height:110px;
  display:grid;place-items:center;padding:16px;box-shadow:var(--shadow-sm);
}
.logos img{max-height:70px;width:auto;object-fit:contain;filter:grayscale(1);opacity:.75;transition:.25s}
.logos li:hover img{filter:none;opacity:1}

/* ---------- Contact ---------- */
.contact-list{display:grid;gap:18px;margin:26px 0}
.contact-list li{display:flex;gap:14px;align-items:flex-start}
.contact-list .ico{
  flex-shrink:0;width:42px;height:42px;border-radius:10px;background:var(--orange);color:#fff;
  display:grid;place-items:center;font-size:1.1rem;
}
.contact-list strong{display:block;font-size:.76rem;letter-spacing:.12em;text-transform:uppercase;color:#9fb6cc}
.contact-list a{color:#fff}
.contact-list a:hover{color:var(--orange)}
.contact-list div > span{color:#cfdcea}

.form{background:#fff;border-radius:var(--radius);padding:clamp(22px,3vw,34px);box-shadow:var(--shadow-lg)}
.field{margin-bottom:16px}
.field label{display:block;font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--steel-700);margin-bottom:6px}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:9px;
  font:inherit;font-size:.95rem;color:var(--ink);background:#fbfcfe;transition:.18s;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--orange);box-shadow:0 0 0 3px rgba(242,101,34,.16);background:#fff;
}
.field textarea{resize:vertical}
.field.has-error input,.field.has-error textarea{border-color:#d33;background:#fff6f6}
.form-note{margin:14px 0 0;font-size:.88rem;color:var(--muted);min-height:1.2em}
.form-note.ok{color:#137a3a;font-weight:600}
.form-note.err{color:#c22;font-weight:600}

/* ---------- Footer ---------- */
.site-footer{background:#081420;color:#9fb6cc;padding-top:56px;font-size:.92rem}
.footer-inner{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:36px;padding-bottom:36px}
.brand-footer{margin-bottom:14px}
.site-footer h4{color:#fff;font-size:1rem;letter-spacing:.1em;margin-bottom:14px}
.site-footer a{color:#9fb6cc}
.site-footer a:hover{color:var(--orange)}
.site-footer ul{display:grid;gap:8px}
.copyright{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;align-items:center;
  border-top:1px solid rgba(255,255,255,.1);padding-block:18px;font-size:.84rem;
}
.copyright p{margin:0}

/* ---------- Lightbox ---------- */
.lightbox{
  position:fixed;inset:0;z-index:120;background:rgba(6,14,22,.94);
  display:flex;align-items:center;justify-content:center;padding:24px;
}
.lightbox[hidden]{display:none}
.lb-figure{margin:0;max-width:1000px;width:100%;text-align:center}
.lb-figure img{max-height:76vh;width:auto;margin-inline:auto;border-radius:10px}
.lb-figure figcaption{color:#cfdcea;margin-top:14px;font-size:.95rem}
.lb-close,.lb-nav{
  position:absolute;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.25);
  color:#fff;cursor:pointer;border-radius:50%;width:48px;height:48px;font-size:1.6rem;line-height:1;
}
.lb-close{top:20px;right:20px;font-size:1.8rem}
.lb-nav{top:50%;transform:translateY(-50%)}
.lb-prev{left:16px}
.lb-next{right:16px}
.lb-close:hover,.lb-nav:hover{background:var(--orange);border-color:var(--orange)}

/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .6s ease,transform .6s ease}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media (max-width:900px){
  .nav-toggle{display:block}
  .site-nav{
    grid-column:1 / -1;max-height:0;overflow:hidden;transition:max-height .3s ease;
  }
  .site-nav.is-open{max-height:520px}
  .site-nav ul{flex-direction:column;align-items:stretch;gap:0;padding-bottom:14px}
  .site-nav li{border-top:1px solid rgba(255,255,255,.08)}
  .site-nav a{display:block;padding:14px 4px}
  .nav-cta{text-align:center;margin-top:12px}
  .hero{min-height:auto}
  .shot img,.shot video{height:210px}
}
@media (max-width:520px){
  .brand-text small{display:none}
  .btn{width:100%}
  .hero-actions{flex-direction:column}
  .lb-nav{width:40px;height:40px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .btn:hover,.service:hover,.shot:hover{transform:none}
}

@media print{
  .site-header,.filters,.lightbox,.hero-actions,.form{display:none !important}
  body{color:#000}
  .section-dark{background:#fff;color:#000}
}