/* Calibro Ingeniería — base, layout, header, hero, secciones, footer */
/* ============ Brand tokens — DO NOT change palette ============ */
  :root{
    --c-red: #d83037;
    --c-red-hover: #b92a30;
    --c-blue: #1e62a8;
    --c-blue-hover: #19528d;
    --c-green: #25d366;
    --c-green-hover: #1fb957;
    --c-ink: #0e0e10;
    --c-text: #1a1a1d;
    --c-muted: #6b6b73;
    --c-line: #e9e9ee;
    --c-bg: #ffffff;
    --c-bg-alt: #f6f6f8;

    /* Brand gradient (extracted from the logo banner) */
    --grad-brand: linear-gradient(90deg, #1aa5b8 0%, #3a4b8a 30%, #6f2b6f 55%, #c84020 80%, #e85a1a 100%);

    --font-display: 'Montserrat', system-ui, sans-serif;
    --font-body: 'Inter', system-ui, sans-serif;

    --radius: 6px;
    --radius-lg: 12px;
    --shadow-card: 0 1px 2px rgba(15,15,20,.06), 0 8px 24px rgba(15,15,20,.06);
    --shadow-card-hover: 0 4px 12px rgba(15,15,20,.08), 0 16px 40px rgba(15,15,20,.12);
    --container: 1200px;
  }

  *,*::before,*::after{ box-sizing: border-box; }
  html{ scroll-behavior: smooth; scroll-padding-top: 88px; }
  body{
    margin:0;
    font-family: var(--font-body);
    color: var(--c-text);
    background: var(--c-bg);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    line-height: 1.55;
  }
  img{ max-width:100%; display:block; }
  a{ color: inherit; text-decoration: none; }
  h1,h2,h3,h4,h5,h6{ font-family: var(--font-display); color: var(--c-ink); margin:0; line-height:1.15; letter-spacing:-0.01em; }
  p{ margin:0; }

  .container{ max-width: var(--container); margin:0 auto; padding: 0 24px; }

  /* ============ Header ============ */
  .site-header{
    position: sticky; top:0; z-index: 50;
    background: rgba(255,255,255,.96);
    backdrop-filter: saturate(160%) blur(10px);
    border-bottom: 1px solid var(--c-line);
  }
  .nav{
    display:flex; align-items:center; justify-content:space-between;
    height: 76px;
  }
  .brand{ display:flex; align-items:center; gap:12px; }
  .sr-only{
    position:absolute; width:1px; height:1px; padding:0; margin:-1px;
    overflow:hidden; clip:rect(0 0 0 0); clip-path:inset(50%); white-space:nowrap; border:0;
  }
  .brand{ display:flex; align-items:center; gap:12px; flex: 0 0 auto; }
  .brand img{ height: 44px; width:auto; flex: 0 0 auto; }
  .nav-links{
    display:flex; align-items:center; gap: 24px;
    list-style:none; margin:0; padding:0;
    flex: 0 1 auto; min-width: 0;
  }
  .nav-links a{
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 15px;
    color: #2b2b30;
    transition: color .15s ease;
    position: relative;
  }
  .nav-links a:hover{ color: var(--c-red); }
  .nav-links a.active::after{
    content:""; position:absolute; left:0; right:0; bottom:-6px; height:2px;
    background: var(--c-red);
  }
  .nav-right{ display:flex; align-items:center; gap: 28px; flex: 0 0 auto; margin-left: 24px; }
  .btn-wa{
    display:inline-flex; align-items:center; gap:10px;
    background: var(--c-green); color:#fff;
    padding: 12px 22px; border-radius: var(--radius);
    font-family: var(--font-display); font-weight:600; font-size: 14px;
    transition: background .15s ease, transform .15s ease;
  }
  .btn-wa:hover{ background: var(--c-green-hover); }
  .btn-wa i{ font-size: 16px; }

  .nav-toggle{
    display:none; background:none; border:0; cursor:pointer;
    width: 40px; height: 40px; align-items:center; justify-content:center;
    color: var(--c-ink);
  }

  /* ============ Hero ============ */
  .hero{
    position: relative;
    min-height: clamp(560px, 88vh, 820px);
    background:
      radial-gradient(1100px 700px at 18% 20%, rgba(30,98,168,0.18) 0%, transparent 60%),
      radial-gradient(900px 600px at 88% 88%, rgba(216,48,55,0.16) 0%, transparent 55%),
      linear-gradient(135deg, #0c0d11 0%, #16181f 45%, #1d2230 100%);
    color: #fff;
    display:flex; align-items:flex-end;
    padding-bottom: 90px;
    overflow: hidden;
  }
  .hero-video{
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 0;
    pointer-events: none;
    /* Fallback poster — YouTube thumbnail of xuB7VzxbmMM. Always visible behind the iframe;
       if the iframe is blocked (error 153) the poster covers the hero. */
    background: #0c0d11 url('../assets/images/hero-calibro.jpg') center/cover no-repeat;
  }
  .hero-video .ken{
    position: absolute;
    inset: -4%;
    background: inherit;
    background-color: transparent;
    animation: kenburns 28s ease-in-out infinite alternate;
    will-change: transform;
  }
  @keyframes kenburns{
    0%   { transform: scale(1.04) translate(0, 0); }
    100% { transform: scale(1.14) translate(-1.5%, -1.5%); }
  }
  .hero-video iframe{
    position: absolute;
    top: 50%; left: 50%;
    /* Force 16:9 cover — width = max(100vw, 100vh*16/9) */
    width: 100vw;
    height: 56.25vw;          /* 16:9 ratio */
    min-height: 100%;
    min-width: 177.78vh;      /* 16:9 ratio (height * 16/9) */
    transform: translate(-50%, -50%);
    border: 0;
    pointer-events: none;
  }
  .hero-video::after{
    /* Dark overlay over the video so text stays legible */
    content:"";
    position:absolute; inset:0;
    background:
      radial-gradient(1100px 700px at 18% 20%, rgba(30,98,168,0.22) 0%, transparent 60%),
      radial-gradient(900px 600px at 88% 88%, rgba(216,48,55,0.18) 0%, transparent 55%),
      linear-gradient(180deg, rgba(8,9,12,0.55) 0%, rgba(8,9,12,0.78) 100%);
  }
  .hero-inner{ z-index: 2; }
  .hero::after{
    /* Blueprint grid overlay */
    content:"";
    position:absolute; inset:0;
    background-image:
      linear-gradient(rgba(255,255,255,0.045) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,0.045) 1px, transparent 1px);
    background-size: 56px 56px, 56px 56px;
    -webkit-mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.2) 75%);
            mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.2) 75%);
    pointer-events: none;
    z-index: 1;
  }
  .hero::before{
    /* brand gradient strip at top */
    content:""; position:absolute; top:0; left:0; right:0; height: 4px;
    background: var(--grad-brand);
  }
  .hero-inner{ position: relative; z-index: 2; max-width: 980px; }
  .hero-row{
    display: flex;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap;
  }
  .hero-row p{ flex: 1 1 360px; max-width: 620px; margin: 0; }
  .hero-row .hero-cta{
    flex: 0 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: stretch;
  }
  .hero-row .hero-cta .btn{ min-width: 180px; }
  .hero h1{
    font-size: clamp(38px, 6vw, 64px);
    font-weight: 800;
    color: #fff;
    margin-bottom: 20px;
    text-wrap: balance;
  }
  .hero p{
    font-size: clamp(16px, 1.6vw, 19px);
    color: rgba(255,255,255,.92);
    margin-bottom: 32px;
    max-width: 560px;
  }
  .hero-cta{ display:flex; flex-wrap:wrap; gap:14px; }
  .btn{
    display:inline-flex; align-items:center; justify-content:center; gap:8px;
    padding: 14px 28px;
    font-family: var(--font-display);
    font-weight: 600; font-size: 15px;
    border-radius: var(--radius);
    color: #fff;
    border: 1.5px solid transparent; cursor: pointer;
    transition: background .15s ease, transform .15s ease;
    min-width: 160px;
  }
  .btn-red{ background: var(--c-red); }
  .btn-red:hover{ background: var(--c-red-hover); }
  .btn-blue{ background: var(--c-blue); }
  .btn-blue:hover{ background: var(--c-blue-hover); }
  .btn-ink{ background: rgba(255,255,255,.14); border: 1.5px solid rgba(255,255,255,.55); backdrop-filter: blur(4px); }
  .btn-ink:hover{ background: rgba(255,255,255,.24); border-color: #fff; }
  .btn-ghost{
    background: transparent; color:#fff;
    border: 1.5px solid rgba(255,255,255,.5);
  }
  .btn-ghost:hover{ background: rgba(255,255,255,.1); }

  /* ============ Sections ============ */
  section{ padding: 96px 0; }
  .section-eyebrow{
    font-family: var(--font-display);
    font-size: 13px; letter-spacing: 0.18em; text-transform: uppercase;
    color: var(--c-red); font-weight: 600;
    margin-bottom: 16px;
  }
  .section-title{
    font-size: clamp(28px, 3.6vw, 44px);
    font-weight: 800;
    margin-bottom: 18px;
    text-wrap: balance;
  }
  .section-lead{
    font-size: 17px; color: var(--c-muted);
    max-width: 720px;
    margin-bottom: 56px;
    text-wrap: pretty;
  }

  /* About */
  .about{ background: var(--c-bg); }
  .about-grid{
    display:grid; grid-template-columns: 1.05fr .95fr; gap: 72px; align-items: center;
  }
  .about-text p + p{ margin-top: 18px; }
  .about-text p{ font-size: 17px; color: #3a3a40; }
  .about-stats{
    display:grid; grid-template-columns: repeat(2, 1fr); gap: 24px;
    margin-top: 40px;
  }
  .stat{
    border-left: 3px solid var(--c-red);
    padding: 4px 0 4px 16px;
  }
  .stat .num{
    font-family: var(--font-display); font-weight: 800;
    font-size: 32px; color: var(--c-ink);
  }
  .stat .lbl{ font-size: 14px; color: var(--c-muted); }
  .about-media{
    aspect-ratio: 4/5;
    background:
      radial-gradient(700px 500px at 25% 20%, rgba(30,98,168,0.22) 0%, transparent 60%),
      radial-gradient(600px 400px at 80% 85%, rgba(216,48,55,0.18) 0%, transparent 55%),
      linear-gradient(135deg, #0c0d11 0%, #1a1d26 50%, #232838 100%);
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
  }
  .about-media::before{
    content:""; position:absolute; inset:0;
    background-image:
      linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
    background-size: 44px 44px, 44px 44px;
    -webkit-mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0.15) 80%);
            mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0.15) 80%);
  }
  .about-media::after{
    content:""; position:absolute; inset: auto 0 0 0; height: 5px;
    background: var(--grad-brand);
  }
  /* Decorative SVG icon centered on about-media */
  .about-media .gear{
    position: absolute; inset: 0;
    display: flex; align-items: center; justify-content: center;
    color: rgba(255,255,255,0.12);
  }
  .about-media .gear svg{ width: 55%; max-width: 280px; height: auto; }

  /* Services */
  .services{ background: var(--c-bg-alt); }
  .svc-grid{
    display:grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
  }
  .svc-card{
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: transform .2s ease, box-shadow .2s ease;
    display:flex; flex-direction:column;
  }
  .svc-card:hover{ transform: translateY(-4px); box-shadow: var(--shadow-card-hover); }
  .svc-thumb{
    aspect-ratio: 16/10;
    background: #d8dbe2;
    position: relative;
    overflow: hidden;
  }
  .svc-thumb::after{
    content:""; position:absolute; inset:0;
    background: linear-gradient(180deg, rgba(14,14,16,0) 50%, rgba(14,14,16,.45) 100%);
  }
  .svc-thumb.t-desarrollo{
    background: linear-gradient(135deg, #1a1a1d 0%, #2a2f3a 100%);
  }
  .svc-thumb.t-fabricacion{
    background: linear-gradient(135deg, #1e62a8 0%, #0e3258 100%);
  }
  .svc-thumb.t-portfolio{
    background: linear-gradient(135deg, #d83037 0%, #7a1c20 100%);
  }
  .svc-thumb .icon{
    position:absolute; inset:0; display:flex; align-items:center; justify-content:center;
    color: rgba(255,255,255,.85); font-size: 64px;
  }
  .svc-body{ padding: 28px 28px 32px; }
  .svc-body h3{
    font-size: 22px; font-weight: 700; margin-bottom: 12px;
  }
  .svc-body p{ color: var(--c-muted); font-size: 15px; margin-bottom: 18px; }
  .svc-link{
    font-family: var(--font-display); font-weight: 600; font-size: 14px;
    color: var(--c-red);
    display:inline-flex; align-items:center; gap:8px;
  }
  .svc-link i{ transition: transform .15s ease; }
  .svc-card:hover .svc-link i{ transform: translateX(4px); }

  /* Capabilities (3 bullets per service) */
  .caps{
    display:grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
    margin-top: 56px;
  }
  .cap{
    padding: 28px;
    background: #fff;
    border: 1px solid var(--c-line);
    border-radius: var(--radius-lg);
  }
  .cap .ic{
    width: 48px; height: 48px; border-radius: 10px;
    background: rgba(216,48,55,.08);
    color: var(--c-red);
    display:flex; align-items:center; justify-content:center;
    font-size: 20px; margin-bottom: 18px;
  }
  .cap h4{ font-size: 17px; margin-bottom: 8px; }
  .cap p{ font-size: 14px; color: var(--c-muted); }

  /* Contact */
  .contact{ background: var(--c-bg-alt); }
  .contact-grid{
    display:grid; grid-template-columns: 1fr 1fr; gap: 56px;
  }
  .contact-info h3{ font-size: 22px; margin-bottom: 18px; }
  .contact-info p{ color: var(--c-muted); font-size: 15px; margin-bottom: 28px; }
  .contact-row{
    display:flex; gap:14px; align-items:flex-start;
    padding: 16px 0;
    border-bottom: 1px solid var(--c-line);
  }
  .contact-row:last-child{ border-bottom: 0; }
  .contact-row .ic{
    width: 38px; height: 38px; border-radius: 8px;
    background: #fff; border: 1px solid var(--c-line);
    color: var(--c-red);
    display:flex; align-items:center; justify-content:center; flex: 0 0 auto;
  }
  .contact-row .lbl{ font-size: 12px; color: var(--c-muted); text-transform: uppercase; letter-spacing: .08em; }
  .contact-row .val{ font-size: 15px; color: var(--c-ink); font-weight: 500; }

  form.cf{
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--c-line);
    display:flex; flex-direction:column; gap: 16px;
  }
  .cf label{ font-size: 13px; font-weight: 600; color: var(--c-ink); }
  .cf input, .cf textarea{
    width: 100%; padding: 12px 14px;
    border: 1px solid var(--c-line);
    border-radius: var(--radius);
    font: inherit; font-size: 15px;
    background: #fff;
    transition: border .15s ease, box-shadow .15s ease;
  }
  .cf input:focus, .cf textarea:focus{
    outline: 0; border-color: var(--c-red);
    box-shadow: 0 0 0 3px rgba(216,48,55,.12);
  }
  .cf textarea{ resize: vertical; min-height: 120px; }
  .cf .submit{
    background: var(--c-red); color:#fff;
    padding: 14px 28px; border:0; border-radius: var(--radius);
    font-family: var(--font-display); font-weight: 600; font-size: 15px;
    cursor: pointer; transition: background .15s ease;
    align-self: flex-start;
  }
  .cf .submit:hover{ background: var(--c-red-hover); }
  .cf .legal{ font-size: 12px; color: var(--c-muted); margin-top: 4px; }
  .cf .legal a{ color: var(--c-red); text-decoration: underline; }
  .cf-hp{ position:absolute !important; left:-9999px !important; width:1px !important; height:1px !important; opacity:0; }
  .cf input.err, .cf textarea.err{ border-color: var(--c-red); background: rgba(216,48,55,.04); }
  .cf .submit[disabled]{ opacity:.6; cursor: default; }
  .cf-msg{ font-size:13px; font-weight:600; margin:0; display:none; padding:10px 14px; border-radius: var(--radius); }
  .cf-msg.show{ display:block; }
  .cf-msg.ok{ color:#136c3a; background:rgba(19,108,58,.08); border:1px solid rgba(19,108,58,.25); }
  .cf-msg.bad{ color:var(--c-red); background:rgba(216,48,55,.07); border:1px solid rgba(216,48,55,.25); }

  /* Footer */
  .footer{
    background: var(--c-ink); color: rgba(255,255,255,.7);
    padding: 56px 0 32px;
  }
  .footer-grid{
    display:grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 56px;
    margin-bottom: 40px;
  }
  .footer h5{
    color:#fff; font-size: 13px; letter-spacing: .12em; text-transform: uppercase;
    margin-bottom: 18px; font-weight: 700;
  }
  .footer a{ color: rgba(255,255,255,.7); display:block; padding: 5px 0; font-size: 14px; }
  .footer a:hover{ color:#fff; }
  .footer-social{ display:flex; gap:10px; margin-top:16px; }
  .footer-social a{
    width:36px; height:36px; border-radius:50%;
    background:rgba(255,255,255,.09); color:rgba(255,255,255,.8);
    display:flex; align-items:center; justify-content:center; padding:0; font-size:14px;
    transition:background .15s ease, color .15s ease;
  }
  .footer-social a:hover{ background:var(--c-red); color:#fff; }
  .footer .brand-blk img{ height: 48px; filter: brightness(0) invert(1); margin-bottom: 18px; }
  .footer .brand-blk p{ font-size: 14px; line-height: 1.6; max-width: 380px; }
  .footer-bottom{
    border-top: 1px solid rgba(255,255,255,.1);
    padding-top: 24px;
    display:flex; justify-content: space-between; gap:20px;
    font-size: 13px; flex-wrap: wrap;
  }
  .footer-bottom .grad-bar{
    position: relative;
  }
  .footer::before{
    content:""; display:block; height: 4px; background: var(--grad-brand);
    margin: -56px 0 56px;
  }

  /* WhatsApp floating button */
  .wa-float{
    position: fixed; right: 22px; bottom: 22px;
    width: 58px; height: 58px;
    background: var(--c-green); color:#fff;
    border-radius: 50%;
    display:flex; align-items:center; justify-content:center;
    font-size: 28px;
    box-shadow: 0 6px 20px rgba(37,211,102,.4);
    z-index: 40;
    transition: transform .2s ease;
  }
  .wa-float:hover{ transform: scale(1.08); background: var(--c-green-hover); }

  /* ============ Responsive ============ */
  @media (max-width: 980px){
    .about-grid{ grid-template-columns: 1fr; gap: 40px; }
    .about-media{ aspect-ratio: 16/10; }
    .svc-grid, .caps, .pf-grid{ grid-template-columns: repeat(2, 1fr); }
    .contact-grid, .footer-grid{ grid-template-columns: 1fr; gap: 40px; }
  }
  @media (max-width: 1040px){
    .nav-links{ display:none; }
    .nav-right .btn-wa span{ display:none; }
    .nav-toggle{ display:flex; }
    body.nav-open .nav-links{
      display:flex; flex-direction:column; gap:4px;
      position:absolute; top:76px; left:0; right:0;
      background:#fff; padding:14px 24px 20px;
      border-bottom:1px solid var(--c-line);
      box-shadow:0 12px 28px rgba(15,15,20,.10);
    }
    body.nav-open .nav-links a{ display:block; padding:11px 0; font-size:16px; }
    body.nav-open .nav-links a.active::after{ display:none; }
    body.nav-open .nav-links a.active{ color:var(--c-red); }
  }
  @media (max-width: 720px){
    section{ padding: 64px 0; }
    .svc-grid, .caps, .pf-grid{ grid-template-columns: 1fr; }
    .hero{ padding-bottom: 64px; min-height: 600px; }
    .about-stats{ grid-template-columns: 1fr; }
    form.cf{ padding: 24px; }
  }

  /* Reveal on scroll */
  .reveal{ opacity: 0; transform: translateY(20px); transition: opacity .7s ease, transform .7s ease; }
  .reveal.in{ opacity: 1; transform: none; }