/* ============================================================
   Tornillos MG — Hoja de estilos para páginas estáticas SEO
   Reutiliza la paleta y tipografías de la marca.
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Oswald:wght@400;500;600;700&family=IBM+Plex+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root{
  --accent:#B23A28; --accent-strong:#8E2A1B; --accent-soft:#F7DDD7;
  --ink-950:#0F1513; --ink-900:#1A2321; --ink-800:#24302D; --ink-700:#324440;
  --steel-50:#F6F6F4; --steel-100:#ECECE8; --steel-200:#DEDED9; --steel-300:#C5C6BF;
  --steel-400:#9D9E96; --steel-500:#76776F; --steel-600:#5B5C55; --steel-700:#43443E; --steel-900:#1B1C18;
  --white:#fff;
  --bg-page:#F6F6F4; --surface-dark:#1A2321; --surface-sunken:#ECECE8; --surface-card:#fff;
  --border:#DEDED9; --border-strong:#C5C6BF; --border-on-dark:rgba(255,255,255,0.12);
  --text-strong:#1A2321; --text-body:#43443E; --text-muted:#76776F;
  --font-display:'Oswald',Impact,sans-serif; --font-body:'IBM Plex Sans',Arial,sans-serif; --font-mono:'IBM Plex Mono',monospace;
  --radius-sm:5px; --radius-md:11px;
  --container-max:1180px; --container-pad:24px; --section-y:clamp(48px,4vw,80px);
  --dur:.2s; --ease:cubic-bezier(.2,.7,.3,1);
  --shadow-lg:0 24px 50px -28px rgba(15,21,19,.5);
  --hazard:repeating-linear-gradient(45deg,var(--accent) 0 16px,var(--ink-900) 16px 32px);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font-body);color:var(--text-body);background:var(--bg-page);line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--accent)}
.container{width:100%;max-width:var(--container-max);margin:0 auto;padding:0 var(--container-pad)}
.section{padding:var(--section-y) 0}
.section--sunken{background:var(--surface-sunken)}
.section--dark{background:var(--surface-dark);color:var(--steel-200)}

/* ---------- Header ---------- */
.hdr{position:sticky;top:0;z-index:100;background:linear-gradient(180deg,rgba(12,17,15,.98),rgba(15,21,19,.92));backdrop-filter:blur(14px);border-bottom:1px solid rgba(255,255,255,.08)}
.hdr__bar{display:flex;align-items:center;justify-content:space-between;height:70px;gap:20px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none}
.brand img{width:40px;height:40px;object-fit:contain}
.brand b{font-family:var(--font-display);font-weight:700;text-transform:uppercase;font-size:18px;color:#fff;line-height:1}
.brand b span{color:var(--accent)}
.brand small{font-family:var(--font-mono);font-size:8.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--steel-400);display:block;margin-top:3px}
.nav{display:flex;align-items:center;gap:22px}
.nav a{font-family:var(--font-body);font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--steel-200);text-decoration:none}
.nav a:hover{color:var(--accent)}
.hdr__cta{display:flex;align-items:center;gap:14px}
.hdr__phone{display:flex;flex-direction:column;line-height:1.1;text-decoration:none}
.hdr__phone small{font-family:var(--font-mono);font-size:9px;letter-spacing:.13em;text-transform:uppercase;color:var(--steel-400)}
.hdr__phone b{font-family:var(--font-display);font-weight:600;font-size:16px;color:#fff}
.menu-btn{display:none;background:none;border:1px solid var(--border-on-dark);color:#fff;border-radius:var(--radius-sm);padding:8px 10px;font-size:18px;cursor:pointer}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-family:var(--font-display);font-weight:600;text-transform:uppercase;letter-spacing:.04em;font-size:15px;padding:12px 22px;border-radius:var(--radius-sm);border:2px solid transparent;cursor:pointer;text-decoration:none;line-height:1.1;transition:all var(--dur) var(--ease)}
.btn--primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn--primary:hover{background:var(--accent-strong);border-color:var(--accent-strong)}
.btn--ondark{background:transparent;color:#fff;border-color:rgba(255,255,255,.45)}
.btn--ondark:hover{background:rgba(255,255,255,.1)}
.btn--outline{background:transparent;color:var(--ink-900);border-color:var(--border-strong)}
.btn--lg{font-size:16px;padding:15px 28px}
.btn--block{display:flex;width:100%}

/* ---------- Hero ---------- */
.hero{position:relative;background:var(--ink-950);overflow:hidden}
.hero__img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero__scrim{position:absolute;inset:0;background:linear-gradient(90deg,rgba(15,21,19,.96) 0%,rgba(15,21,19,.82) 48%,rgba(15,21,19,.5) 100%)}
.hero__in{position:relative;padding:clamp(3rem,2rem+5vw,6.5rem) 0;max-width:760px}
.eyebrow{font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);margin:0 0 16px}
.hero h1{margin:0;font-family:var(--font-display);font-weight:700;text-transform:uppercase;letter-spacing:.01em;line-height:1.05;font-size:clamp(2.1rem,1.4rem+3.4vw,3.6rem);color:#fff}
.hero h1 span{color:var(--accent)}
.hero__lead{margin:20px 0 0;max-width:600px;font-size:clamp(1rem,.95rem+.4vw,1.2rem);color:var(--steel-200)}
.hero__cta{display:flex;flex-wrap:wrap;gap:13px;margin-top:26px}
.hero__chips{display:flex;flex-wrap:wrap;gap:24px;margin-top:26px;padding-top:22px;border-top:1px solid var(--border-on-dark)}
.hero__chips span{display:flex;align-items:center;gap:8px;color:var(--steel-200);font-size:14px}

/* ---------- Breadcrumb ---------- */
.crumb{font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;color:var(--text-muted);padding:14px 0}
.crumb a{color:var(--text-muted);text-decoration:none}
.crumb a:hover{color:var(--accent)}

/* ---------- Typography blocks ---------- */
.lead{font-size:1.12rem;color:var(--text-strong);max-width:760px}
h2{font-family:var(--font-display);font-weight:600;text-transform:uppercase;letter-spacing:.01em;color:var(--ink-900);font-size:clamp(1.5rem,1.2rem+1.3vw,2.1rem);line-height:1.15;margin:0 0 14px}
h3{font-family:var(--font-display);font-weight:600;color:var(--ink-900);font-size:1.2rem;margin:24px 0 8px}
.section p{max-width:820px}
.muted{color:var(--text-muted)}
.kicker{font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin:0 0 10px}

/* ---------- Spec grid / cards ---------- */
.grid{display:grid;gap:18px}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.card{background:var(--surface-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:22px 22px;box-shadow:0 1px 0 rgba(0,0,0,.02)}
.card h3{margin-top:0}
.card--accent{border-top:4px solid var(--accent)}
.specs{list-style:none;margin:0;padding:0}
.specs li{display:flex;gap:10px;padding:9px 0;border-bottom:1px solid var(--border);font-size:15px}
.specs li:last-child{border-bottom:0}
.specs li::before{content:"";flex:0 0 8px;height:8px;margin-top:7px;background:var(--accent);border-radius:2px}
.tag{display:inline-block;background:var(--ink-900);color:#fff;font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;padding:4px 11px;border-radius:3px;margin:0 6px 6px 0}

/* ---------- Media figure ---------- */
.figure{border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--border)}
.figure img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}

/* ---------- FAQ ---------- */
.faq{max-width:840px}
.faq details{background:var(--surface-card);border:1px solid var(--border);border-radius:var(--radius-sm);margin-bottom:10px;padding:2px 18px}
.faq summary{cursor:pointer;font-family:var(--font-display);font-weight:600;font-size:1.05rem;color:var(--ink-900);padding:14px 0;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--accent);font-size:1.3rem;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{margin:0 0 14px;color:var(--text-body)}

/* ---------- CTA band ---------- */
.cta-band{background:var(--ink-900);color:#fff;border-radius:var(--radius-md);padding:clamp(28px,4vw,48px);text-align:center;background-image:radial-gradient(120% 120% at 80% 10%,rgba(178,58,40,.28),rgba(26,35,33,0) 55%)}
.cta-band h2{color:#fff}
.cta-band p{color:var(--steel-200);max-width:640px;margin:0 auto 22px}
.cta-band .btn{margin:6px}

/* ---------- Internal links list ---------- */
.linklist{display:flex;flex-wrap:wrap;gap:10px}
.linklist a{display:inline-flex;align-items:center;gap:7px;background:var(--surface-card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:10px 14px;font-size:14px;font-weight:600;color:var(--ink-900);text-decoration:none}
.linklist a:hover{border-color:var(--accent);color:var(--accent)}

/* ---------- Footer ---------- */
.ftr{background:var(--ink-950);color:var(--steel-300);border-top:1px solid var(--border-on-dark)}
.ftr__stripe{height:5px;background:var(--hazard)}
.ftr__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:30px;padding:46px 0 12px}
.ftr h4{font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin:0 0 12px}
.ftr a{color:var(--steel-300);text-decoration:none;display:block;margin-bottom:8px;font-size:14px}
.ftr a:hover{color:#fff}
.ftr__brand b{font-family:var(--font-display);font-weight:700;text-transform:uppercase;font-size:18px;color:#fff}
.ftr__brand b span{color:var(--accent)}
.ftr__bottom{border-top:1px solid var(--border-on-dark);padding:18px 0;display:flex;flex-wrap:wrap;gap:8px;justify-content:space-between;font-family:var(--font-mono);font-size:11.5px;color:var(--steel-500)}

/* ---------- Floating WhatsApp ---------- */
.wa-float{position:fixed;right:18px;bottom:18px;z-index:200;display:flex;align-items:center;gap:10px;background:#25D366;color:#fff;font-family:var(--font-display);font-weight:600;text-transform:uppercase;letter-spacing:.03em;font-size:14px;padding:13px 18px;border-radius:50px;text-decoration:none;box-shadow:0 10px 26px -8px rgba(0,0,0,.5)}
.wa-float svg{width:22px;height:22px;fill:#fff}
.wa-float span{display:inline}

/* ---------- Responsive ---------- */
@media(max-width:860px){
  .nav,.hdr__phone{display:none}
  .menu-btn{display:inline-block}
  .nav.open{display:flex;position:absolute;top:70px;left:0;right:0;flex-direction:column;gap:0;background:var(--ink-900);padding:8px 0;border-bottom:1px solid var(--border-on-dark)}
  .nav.open a{padding:13px 24px;width:100%;border-bottom:1px solid rgba(255,255,255,.06)}
  .wa-float span{display:none}
  .wa-float{padding:14px;border-radius:50%}
}