/* =================================================================
   INSTALMANT — Sistema visual
   Instalaciones y mantenimiento de agua, luz y gas · Barcelona
   Paleta: petróleo profundo + latón cálido. Premium, familiar, B2B.
   ================================================================= */

:root{
  --petrol-900:#0a2330;
  --petrol-800:#0e2c3d;
  --petrol-700:#123a50;
  --petrol-600:#1a4d66;
  --petrol-500:#246585;
  --brass-600:#c9893e;
  --brass-500:#dca454;
  --brass-400:#e6b974;
  --brass-100:#f6e9d6;
  --cream:#f7f4ef;
  --cream-2:#efe9e0;
  --paper:#ffffff;
  --ink:#16242c;
  --ink-soft:#42555e;
  --line:#e3ddd2;
  --line-dark:rgba(255,255,255,.14);

  --serif:"Fraunces",Georgia,"Times New Roman",serif;
  --sans:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;

  --container:1180px;
  --radius:14px;
  --radius-lg:22px;
  --shadow-sm:0 2px 10px rgba(10,35,48,.06);
  --shadow:0 18px 50px -20px rgba(10,35,48,.28);
  --shadow-lg:0 34px 80px -30px rgba(10,35,48,.45);
  --t:.35s cubic-bezier(.2,.7,.2,1);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--sans);color:var(--ink);background:var(--cream);line-height:1.65;font-size:1.02rem;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:0;background:none}
:focus-visible{outline:3px solid var(--brass-500);outline-offset:3px;border-radius:4px}

h1,h2,h3,h4{font-family:var(--serif);font-weight:560;line-height:1.08;color:var(--petrol-900);letter-spacing:-.01em}
h1{font-size:clamp(2.5rem,6vw,4.4rem)}
h2{font-size:clamp(1.9rem,4vw,3rem)}
h3{font-size:clamp(1.3rem,2.4vw,1.7rem)}
p{color:var(--ink-soft)}
.lead{font-size:clamp(1.1rem,1.8vw,1.35rem);color:var(--ink-soft);line-height:1.6}
strong{color:var(--ink);font-weight:650}

.container{width:min(100% - 2.4rem,var(--container));margin-inline:auto}
.section{padding:clamp(3.5rem,8vw,7rem) 0}
.section--tight{padding:clamp(2.5rem,5vw,4rem) 0}
.grid{display:grid;gap:clamp(1.2rem,3vw,2.2rem)}
.center{text-align:center}
.bg-paper{background:var(--paper)}
.bg-cream2{background:var(--cream-2)}
.eyebrow{display:inline-flex;align-items:center;gap:.55rem;font-size:.78rem;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--brass-600);margin-bottom:1rem}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--brass-500);display:inline-block}
.section-head{max-width:42rem;margin-bottom:clamp(2rem,4vw,3.2rem)}
.section-head.center{margin-inline:auto}
.section-head p{margin-top:1rem;font-size:1.12rem}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:.6rem;padding:.95rem 1.7rem;border-radius:50px;font-weight:650;font-size:.97rem;transition:transform var(--t),box-shadow var(--t),background var(--t),color var(--t);white-space:nowrap;line-height:1}
.btn svg{width:18px;height:18px}
.btn--primary{background:var(--brass-500);color:var(--petrol-900);box-shadow:0 12px 28px -12px rgba(201,137,62,.8)}
.btn--primary:hover{background:var(--brass-400);transform:translateY(-2px);box-shadow:0 18px 34px -12px rgba(201,137,62,.9)}
.btn--dark{background:var(--petrol-800);color:#fff}
.btn--dark:hover{background:var(--petrol-700);transform:translateY(-2px)}
.btn--ghost{background:transparent;color:var(--petrol-900);box-shadow:inset 0 0 0 1.5px var(--petrol-800)}
.btn--ghost:hover{background:var(--petrol-900);color:#fff}
.btn--light{background:#fff;color:var(--petrol-900)}
.btn--light:hover{background:var(--cream);transform:translateY(-2px)}
.btn--ghost-light{box-shadow:inset 0 0 0 1.5px rgba(255,255,255,.5);color:#fff}
.btn--ghost-light:hover{background:#fff;color:var(--petrol-900)}
.btn-row{display:flex;flex-wrap:wrap;gap:.8rem;align-items:center}

.link-arrow{display:inline-flex;align-items:center;gap:.45rem;font-weight:650;color:var(--petrol-700);transition:gap var(--t),color var(--t)}
.link-arrow::after{content:"→";transition:transform var(--t)}
.link-arrow:hover{color:var(--brass-600)}
.link-arrow:hover::after{transform:translateX(4px)}

.site-header{position:sticky;top:0;z-index:60;background:rgba(247,244,239,.82);backdrop-filter:blur(14px);border-bottom:1px solid transparent;transition:border-color var(--t),box-shadow var(--t),background var(--t)}
.site-header.scrolled{border-color:var(--line);box-shadow:var(--shadow-sm)}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand{display:flex;align-items:center;gap:.7rem;font-family:var(--serif);font-weight:600;font-size:1.5rem;color:var(--petrol-900);letter-spacing:-.02em}
.brand .mark{width:38px;height:38px;flex:0 0 38px}
.brand .bt small{display:block;font-family:var(--sans);font-size:.58rem;letter-spacing:.22em;text-transform:uppercase;color:var(--brass-600);font-weight:700;margin-top:-3px;line-height:1}
.brand .bt b{font-weight:600;line-height:1}
.nav-links{display:flex;align-items:center;gap:.3rem}
.nav-links>li>a{display:block;padding:.55rem .85rem;border-radius:8px;font-size:.94rem;font-weight:550;color:var(--petrol-800);transition:background var(--t),color var(--t)}
.nav-links>li>a:hover,.nav-links>li>a[aria-current="page"]{background:rgba(18,58,80,.08);color:var(--petrol-900)}
.nav-cta{display:flex;align-items:center;gap:.7rem;margin-left:.6rem}
.nav-phone{display:inline-flex;align-items:center;gap:.4rem;font-weight:650;color:var(--petrol-900);font-size:.95rem}
.nav-phone svg{width:16px;height:16px;color:var(--brass-600)}
.nav-toggle{display:none;width:46px;height:46px;border-radius:10px;align-items:center;justify-content:center;color:var(--petrol-900)}
.nav-toggle span{width:22px;height:2px;background:currentColor;position:relative;transition:var(--t)}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:22px;height:2px;background:currentColor;transition:var(--t)}
.nav-toggle span::before{top:-7px}.nav-toggle span::after{top:7px}
body.menu-open .nav-toggle span{background:transparent}
body.menu-open .nav-toggle span::before{top:0;transform:rotate(45deg)}
body.menu-open .nav-toggle span::after{top:0;transform:rotate(-45deg)}

.has-drop{position:relative}
.drop{position:absolute;top:calc(100% + 10px);left:50%;transform:translateX(-50%) translateY(8px);background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:.6rem;min-width:280px;opacity:0;visibility:hidden;transition:var(--t);z-index:70}
.has-drop:hover .drop,.has-drop:focus-within .drop{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.drop a{display:block;padding:.7rem .85rem;border-radius:10px;font-size:.92rem;font-weight:600;color:var(--petrol-800)}
.drop a span{display:block;font-size:.78rem;color:var(--ink-soft);font-weight:450;margin-top:1px}
.drop a:hover{background:var(--cream)}

.hero{position:relative;background:var(--petrol-900);color:#fff;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(1100px 600px at 78% -10%,rgba(220,164,84,.22),transparent 60%),radial-gradient(900px 700px at 10% 110%,rgba(36,101,133,.5),transparent 55%)}
.hero-grid{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(1.5rem,4vw,3.5rem);align-items:center;padding:clamp(3rem,7vw,6rem) 0 clamp(3.5rem,7vw,6rem)}
.hero h1{color:#fff}
.hero .lead{color:rgba(255,255,255,.82);margin-top:1.4rem;max-width:34rem}
.hero .eyebrow{color:var(--brass-400)}
.hero .eyebrow::before{background:var(--brass-400)}
.hero .btn-row{margin-top:2.2rem}
.hero-trust{display:flex;flex-wrap:wrap;gap:1.8rem;margin-top:2.6rem;padding-top:1.8rem;border-top:1px solid var(--line-dark)}
.hero-trust .num{font-family:var(--serif);font-size:1.9rem;color:var(--brass-400);line-height:1}
.hero-trust small{display:block;color:rgba(255,255,255,.66);font-size:.82rem;margin-top:.35rem;max-width:11rem}
.hero-visual{position:relative;border-radius:var(--radius-lg);overflow:hidden;min-height:440px;box-shadow:var(--shadow-lg)}
.hero-badge{position:absolute;left:18px;bottom:18px;right:18px;z-index:3;background:rgba(10,35,48,.72);backdrop-filter:blur(8px);border:1px solid var(--line-dark);border-radius:14px;padding:1rem 1.2rem;display:flex;align-items:center;gap:.9rem}
.hero-badge .dot{width:10px;height:10px;border-radius:50%;background:#4ad07d;box-shadow:0 0 0 4px rgba(74,208,125,.25);flex:0 0 10px}
.hero-badge p{color:#fff;font-size:.9rem;margin:0}
.hero-badge strong{color:#fff}

.photo{position:relative;background:linear-gradient(135deg,var(--petrol-700),var(--petrol-500));border-radius:var(--radius);overflow:hidden;color:#fff;display:flex;align-items:flex-end;min-height:240px}
.photo::after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 40%,rgba(10,35,48,.55)),url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40'%3E%3Cpath d='M0 39h40M39 0v40' stroke='%23ffffff' stroke-opacity='.05'/%3E%3C/svg%3E")}
.photo .photo-tag{position:relative;z-index:2;padding:1rem 1.1rem;font-size:.8rem;color:rgba(255,255,255,.92);display:flex;align-items:center;gap:.5rem}
.photo .photo-tag svg{width:15px;height:15px;opacity:.8;flex:0 0 15px}
.photo--tall{min-height:420px}
.photo--brass{background:linear-gradient(135deg,#9a6a2e,var(--brass-500))}
.photo--ink{background:linear-gradient(150deg,var(--petrol-900),var(--petrol-600))}

.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-lg);padding:clamp(1.4rem,2.4vw,2rem);transition:transform var(--t),box-shadow var(--t),border-color var(--t)}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:transparent}
.card .ic{width:52px;height:52px;border-radius:13px;display:flex;align-items:center;justify-content:center;background:var(--brass-100);color:var(--brass-600);margin-bottom:1.1rem}
.card .ic svg{width:26px;height:26px}
.card h3{margin-bottom:.55rem}
.card p{font-size:.98rem}
.card .link-arrow{margin-top:1.1rem}
.card--feature{background:var(--petrol-900);color:#fff;border-color:transparent}
.card--feature h3{color:#fff}
.card--feature p{color:rgba(255,255,255,.78)}
.card--feature .ic{background:rgba(220,164,84,.18);color:var(--brass-400)}
.card--feature .link-arrow{color:var(--brass-400)}

.cols-2{grid-template-columns:repeat(2,1fr)}
.cols-3{grid-template-columns:repeat(3,1fr)}
.cols-4{grid-template-columns:repeat(4,1fr)}

.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(1.8rem,5vw,4rem);align-items:center}
.split--reverse .split-media{order:2}
.checklist{display:grid;gap:.9rem;margin-top:1.6rem}
.checklist li{display:flex;gap:.75rem;align-items:flex-start;font-size:1rem;color:var(--ink-soft)}
.checklist li::before{content:"";flex:0 0 22px;height:22px;border-radius:50%;margin-top:2px;background:var(--brass-100) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23c9893e' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center/12px no-repeat}
.checklist li strong{color:var(--ink)}

.pillar{position:relative;padding:1.8rem;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden}
.pillar .pnum{font-family:var(--serif);font-size:3rem;color:var(--cream-2);line-height:.8;position:absolute;top:1rem;right:1.2rem}
.pillar h3{margin-bottom:.6rem;position:relative}
.pillar p{position:relative;font-size:.98rem}

.sector{position:relative;border-radius:var(--radius-lg);overflow:hidden;min-height:380px;display:flex;align-items:flex-end;color:#fff}
.sector::before{content:"";position:absolute;inset:0;background:linear-gradient(150deg,var(--petrol-800),var(--petrol-500));transition:transform .6s ease}
.sector:hover::before{transform:scale(1.05)}
.sector::after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 30%,rgba(10,35,48,.82))}
.sector-body{position:relative;z-index:2;padding:1.8rem}
.sector-body h3{color:#fff;margin-bottom:.5rem}
.sector-body p{color:rgba(255,255,255,.82);font-size:.95rem;margin-bottom:1rem}
.sector--hotel::before{background:linear-gradient(150deg,#0e2c3d,#246585)}
.sector--office::before{background:linear-gradient(150deg,#123a50,#3a7a6f)}
.sector--home::before{background:linear-gradient(150deg,#7a4f24,#dca454)}
.sector .tag{display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--brass-400);margin-bottom:.6rem}

.band{background:var(--petrol-900);color:#fff;border-radius:var(--radius-lg);overflow:hidden}
.band-inner{display:grid;grid-template-columns:1.2fr .8fr;gap:0}
.band-text{padding:clamp(2rem,4vw,3.5rem)}
.band-text h2{color:#fff}
.band-text p{color:rgba(255,255,255,.8);margin-top:1rem}
.band-quote{font-family:var(--serif);font-size:clamp(1.3rem,2.4vw,1.85rem);color:#fff;line-height:1.35;font-style:italic}
.band-quote span{color:var(--brass-400)}
.band-cite{margin-top:1.2rem;color:rgba(255,255,255,.7);font-size:.9rem;font-style:normal}
.band-media{position:relative;min-height:320px;background:linear-gradient(135deg,var(--petrol-700),var(--brass-600))}

.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem;text-align:center}
.stat .n{font-family:var(--serif);font-size:clamp(2.2rem,4vw,3.2rem);color:var(--petrol-900);line-height:1}
.stat .n.brass{color:var(--brass-600)}
.stat p{margin-top:.4rem;font-size:.92rem}

.trust-strip{display:flex;flex-wrap:wrap;gap:1rem;justify-content:center}
.trust-pill{display:inline-flex;align-items:center;gap:.6rem;background:var(--paper);border:1px solid var(--line);border-radius:50px;padding:.7rem 1.2rem;font-size:.9rem;font-weight:600;color:var(--petrol-800)}
.trust-pill svg{width:18px;height:18px;color:var(--brass-600);flex:0 0 18px}

.steps{counter-reset:s;display:grid;gap:1.4rem}
.step{display:flex;gap:1.2rem;align-items:flex-start}
.step .sn{counter-increment:s;flex:0 0 48px;height:48px;border-radius:50%;background:var(--petrol-900);color:var(--brass-400);font-family:var(--serif);font-size:1.3rem;display:flex;align-items:center;justify-content:center}
.step .sn::before{content:counter(s)}
.step h3{font-size:1.2rem;margin-bottom:.3rem}
.step p{font-size:.96rem}

.cta-final{position:relative;background:var(--petrol-900);color:#fff;border-radius:var(--radius-lg);padding:clamp(2.5rem,6vw,4.5rem);overflow:hidden;text-align:center}
.cta-final::before{content:"";position:absolute;inset:0;background:radial-gradient(700px 400px at 50% -30%,rgba(220,164,84,.25),transparent 60%)}
.cta-final>*{position:relative}
.cta-final h2{color:#fff;max-width:36rem;margin-inline:auto}
.cta-final p{color:rgba(255,255,255,.8);margin:1rem auto 2rem;max-width:34rem}
.cta-final .btn-row{justify-content:center}

.form{display:grid;gap:1.1rem}
.field{display:grid;gap:.4rem}
.field label{font-size:.85rem;font-weight:650;color:var(--petrol-800)}
.field input,.field select,.field textarea{font-family:inherit;font-size:1rem;padding:.85rem 1rem;border:1.5px solid var(--line);border-radius:12px;background:#fff;color:var(--ink);transition:border-color var(--t),box-shadow var(--t)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brass-500);box-shadow:0 0 0 4px rgba(220,164,84,.16)}
.field textarea{resize:vertical;min-height:120px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1.1rem}
.form-note{font-size:.82rem;color:var(--ink-soft)}
.form-ok{display:none;padding:1rem 1.2rem;border-radius:12px;background:#e7f6ec;color:#1d6b3a;font-weight:600;border:1px solid #b9e3c6}
.form-ok.show{display:block}
.radio-cards{display:grid;grid-template-columns:1fr 1fr;gap:.8rem}
.radio-card{position:relative;border:1.5px solid var(--line);border-radius:12px;padding:.9rem 1rem;cursor:pointer;transition:var(--t)}
.radio-card input{position:absolute;opacity:0}
.radio-card strong{display:block;font-size:.95rem;color:var(--petrol-900)}
.radio-card span{font-size:.8rem;color:var(--ink-soft)}
.radio-card:has(input:checked){border-color:var(--brass-500);background:var(--brass-100)}

.page-hero{background:var(--petrol-900);color:#fff;position:relative;overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(900px 500px at 85% -20%,rgba(220,164,84,.18),transparent 60%)}
.page-hero-inner{position:relative;padding:clamp(2.6rem,6vw,5rem) 0;max-width:46rem}
.page-hero .eyebrow{color:var(--brass-400)}.page-hero .eyebrow::before{background:var(--brass-400)}
.page-hero h1{color:#fff}
.page-hero p{color:rgba(255,255,255,.82);margin-top:1.1rem;font-size:1.15rem}
.crumbs{display:flex;gap:.5rem;align-items:center;font-size:.85rem;color:rgba(255,255,255,.6);margin-bottom:1.4rem;flex-wrap:wrap}
.crumbs a:hover{color:var(--brass-400)}
.crumbs span{opacity:.5}

.faq{display:grid;gap:.8rem;max-width:48rem;margin-inline:auto}
.faq details{background:#fff;border:1px solid var(--line);border-radius:14px;padding:.2rem 1.3rem;transition:var(--t)}
.faq details[open]{box-shadow:var(--shadow-sm)}
.faq summary{list-style:none;cursor:pointer;padding:1.1rem 0;font-weight:650;color:var(--petrol-900);display:flex;justify-content:space-between;align-items:center;gap:1rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.5rem;color:var(--brass-600);transition:var(--t)}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{padding:0 0 1.2rem;font-size:.98rem}

.site-footer{background:var(--petrol-900);color:rgba(255,255,255,.72);padding-top:clamp(3rem,6vw,5rem)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:2rem;padding-bottom:3rem}
.site-footer .brand{color:#fff}
.site-footer h4{color:#fff;font-family:var(--sans);font-size:.82rem;letter-spacing:.14em;text-transform:uppercase;margin-bottom:1.1rem;font-weight:700}
.footer-links a{display:block;color:rgba(255,255,255,.72);font-size:.94rem;line-height:2.1;transition:color var(--t)}
.footer-links a:hover{color:var(--brass-400)}
.footer-about p{font-size:.94rem;margin:1rem 0;max-width:24rem;color:rgba(255,255,255,.72)}
.footer-contact li{display:flex;gap:.6rem;font-size:.94rem;line-height:1.6;margin-bottom:.7rem;color:rgba(255,255,255,.72)}
.footer-contact a{color:rgba(255,255,255,.72)}
.footer-contact a:hover{color:var(--brass-400)}
.footer-contact svg{width:17px;height:17px;color:var(--brass-400);flex:0 0 17px;margin-top:4px}
.footer-bottom{border-top:1px solid var(--line-dark);padding:1.6rem 0;display:flex;flex-wrap:wrap;gap:1rem;justify-content:space-between;align-items:center;font-size:.83rem;color:rgba(255,255,255,.55)}
.footer-bottom a{color:rgba(255,255,255,.55)}
.footer-bottom a:hover{color:var(--brass-400)}

.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}*{scroll-behavior:auto}}

@media (max-width:980px){
  .hero-grid{grid-template-columns:1fr}
  .hero-visual{min-height:320px;order:-1}
  .split,.band-inner{grid-template-columns:1fr}
  .split--reverse .split-media{order:0}
  .band-media{min-height:220px}
  .cols-4{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr);gap:2rem}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  .nav-links,.nav-cta .btn,.nav-phone{display:none}
  .nav-toggle{display:flex}
  .nav-links{position:fixed;inset:74px 0 0;background:var(--cream);flex-direction:column;align-items:stretch;gap:.2rem;padding:1.4rem;transform:translateX(100%);transition:transform var(--t);overflow-y:auto;z-index:55}
  body.menu-open .nav-links{transform:none;display:flex}
  .nav-links>li>a{padding:.95rem 1rem;font-size:1.05rem;border-bottom:1px solid var(--line)}
  .drop{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;padding:0 0 .6rem 1rem;min-width:0;background:transparent}
  .drop a{padding:.5rem 0;color:var(--ink-soft)}
  .cols-2,.cols-3{grid-template-columns:1fr}
  .form-row,.radio-cards{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero-trust{gap:1.2rem}
}

/* Fotos reales */
.photo--img{background:var(--petrol-800)}
.photo-fill{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:1}
.photo--img .photo-tag{display:none}
.hero-badge{z-index:3}