/* =========================================================================
   Solvex — hoja de estilo única. Servicio operado, B2B sobrio.
   Paleta: petróleo (marca) + ámbar (micro-acento) + neutros fríos.
   Tipografía: grotesca de sistema (cuerpo/títulos) + monoespaciada (etiquetas).
   Diseño por tokens; claro y oscuro con la misma solidez.
   ========================================================================= */

/* ---- Reset mínimo ---- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
button, input, textarea { font: inherit; color: inherit; }

/* ---- Tokens: claro por defecto ---- */
:root {
  --bg:        #f4f6f7;
  --surface:   #ffffff;
  --surface-2: #eef1f2;
  --ink:       #0f191e;
  --text:      #39474e;
  --muted:     #6b7a81;
  --line:      #e1e6e8;
  --brand:     #0e4a5c;
  --brand-strong:#0b3a49;
  --link:      #0e4a5c;
  --link-hover:#093240;
  --accent:    #b7791f;
  --focus:     #0e7490;
  --shadow:    0 1px 2px rgba(16,25,30,.05), 0 10px 28px rgba(16,25,30,.07);

  /* fijos en ambos temas */
  --footer-bg:   #0b2f3b;
  --footer-ink:  #eaf1f2;
  --footer-muted:#93b3bc;
  --btn-bg:      #0e4a5c;
  --btn-ink:     #f4f7f7;

  --maxw: 1080px;
  --gutter: clamp(1.15rem, 4vw, 2.5rem);

  --font-sans: "Helvetica Neue", Helvetica, Arial, "Segoe UI", Roboto, system-ui, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;

  --step-eyebrow: .74rem;
  --step-body:    1.0625rem;
  --step-lead:    clamp(1.12rem, 1rem + .5vw, 1.35rem);
  --step-h3:      clamp(1.1rem, 1rem + .4vw, 1.3rem);
  --step-h2:      clamp(1.45rem, 1.15rem + 1.15vw, 2.05rem);
  --step-h1:      clamp(2.05rem, 1.35rem + 3vw, 3.35rem);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:#0b1216; --surface:#111c22; --surface-2:#16232b; --ink:#eef3f2;
    --text:#b6c3c9; --muted:#829097; --line:#213039;
    --brand:#3fa7c0; --brand-strong:#59b8cf; --link:#5cb6cd; --link-hover:#83cade;
    --accent:#d3a24e; --focus:#5cc0da;
    --shadow: 0 1px 2px rgba(0,0,0,.35), 0 12px 32px rgba(0,0,0,.4);
    --btn-bg:#1f7f96; --btn-ink:#f2f8f9;
  }
}
:root[data-theme="dark"] {
  --bg:#0b1216; --surface:#111c22; --surface-2:#16232b; --ink:#eef3f2;
  --text:#b6c3c9; --muted:#829097; --line:#213039;
  --brand:#3fa7c0; --brand-strong:#59b8cf; --link:#5cb6cd; --link-hover:#83cade;
  --accent:#d3a24e; --focus:#5cc0da;
  --shadow: 0 1px 2px rgba(0,0,0,.35), 0 12px 32px rgba(0,0,0,.4);
  --btn-bg:#1f7f96; --btn-ink:#f2f8f9;
}

/* ---- Base ---- */
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--step-body);
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  border-top: 3px solid var(--accent);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
h1, h2, h3 { color: var(--ink); line-height: 1.12; letter-spacing: -.015em; text-wrap: balance; font-weight: 700; }
h1 { font-size: var(--step-h1); letter-spacing: -.025em; }
h2 { font-size: var(--step-h2); }
h3 { font-size: var(--step-h3); letter-spacing: -.01em; }
p  { max-width: 64ch; }
strong { color: var(--ink); font-weight: 700; }

a { color: var(--link); text-decoration: none; text-underline-offset: 3px; }
a:hover { color: var(--link-hover); text-decoration: underline; }

:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; border-radius: 3px; }

/* ---- Layout ---- */
.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
.section  { padding-block: clamp(3rem, 7vw, 5.5rem); }
.section--tight { padding-block: clamp(2.2rem, 5vw, 3.5rem); }
.divider { border: 0; border-top: 1px solid var(--line); }
.stack > * + * { margin-top: 1rem; }
.lead { font-size: var(--step-lead); color: var(--text); max-width: 54ch; }
.muted { color: var(--muted); }
.skip-link {
  position: absolute; left: -999px; top: .5rem;
  background: var(--surface); color: var(--ink); padding: .6rem 1rem;
  border: 1px solid var(--line); border-radius: 6px; z-index: 100;
}
.skip-link:focus { left: .75rem; }

/* ---- Etiqueta monoespaciada (eyebrow) ---- */
.eyebrow {
  display: inline-flex; align-items: center; gap: .7rem;
  font-family: var(--font-mono); font-size: var(--step-eyebrow);
  text-transform: uppercase; letter-spacing: .17em; color: var(--muted);
  font-weight: 500;
}
.eyebrow::before { content: ""; width: 1.7rem; height: 2px; background: var(--accent); }

/* ---- Cabecera ---- */
.site-header { border-bottom: 1px solid var(--line); background: var(--bg); background: color-mix(in srgb, var(--bg) 88%, transparent); position: sticky; top: 0; z-index: 40; -webkit-backdrop-filter: saturate(1.4) blur(8px); backdrop-filter: saturate(1.4) blur(8px); }
.site-header__inner { display: flex; align-items: center; gap: 1.25rem 1.5rem; flex-wrap: wrap; padding-block: .85rem; }
.brand { font-weight: 800; letter-spacing: .04em; font-size: 1.12rem; color: var(--ink); text-transform: uppercase; }
.brand:hover { text-decoration: none; color: var(--brand); }
.brand__dot { color: var(--accent); }
.nav { display: flex; align-items: center; gap: .3rem 1.15rem; flex-wrap: wrap; margin-left: auto; }
.nav a {
  color: var(--muted); font-size: .95rem; padding: .3rem 0; position: relative;
}
.nav a:hover { color: var(--ink); text-decoration: none; }
.nav a[aria-current="page"] { color: var(--ink); }
.nav a[aria-current="page"]::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -.15rem; height: 2px; background: var(--accent);
}
.theme-toggle {
  display: inline-grid; place-items: center; width: 2.1rem; height: 2.1rem;
  background: transparent; border: 1px solid var(--line); border-radius: 7px; cursor: pointer; color: var(--muted);
}
.theme-toggle:hover { color: var(--ink); border-color: var(--muted); }
.theme-toggle svg { width: 1.05rem; height: 1.05rem; }

/* ---- Hero ---- */
.hero { padding-block: clamp(3.2rem, 8vw, 6rem) clamp(2.5rem, 6vw, 4rem); }
.hero h1 { max-width: 16ch; margin-top: 1.1rem; }
.hero .lead { margin-top: 1.4rem; }
.hero__actions { margin-top: 2rem; display: flex; flex-wrap: wrap; gap: .8rem; }

/* ---- Botones ---- */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .72rem 1.25rem; border-radius: 8px; font-weight: 600; font-size: .98rem;
  border: 1px solid transparent; cursor: pointer; transition: transform .12s ease, background .15s ease;
}
.btn--primary { background: var(--btn-bg); color: var(--btn-ink); }
.btn--primary:hover { text-decoration: none; color: var(--btn-ink); transform: translateY(-1px); }
.btn--ghost { border-color: var(--line); color: var(--ink); background: var(--surface); }
.btn--ghost:hover { text-decoration: none; border-color: var(--muted); }

/* ---- Rejilla de líneas de negocio ---- */
.grid { display: grid; gap: 1.15rem; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 860px) { .grid--3 { grid-template-columns: 1fr; } .grid--2 { grid-template-columns: 1fr; } }

.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: 12px;
  padding: clamp(1.4rem, 3vw, 1.9rem); display: flex; flex-direction: column; gap: .65rem;
  transition: border-color .15s ease, transform .15s ease, box-shadow .15s ease;
}
a.card:hover { text-decoration: none; border-color: color-mix(in srgb, var(--brand) 45%, var(--line)); transform: translateY(-2px); box-shadow: var(--shadow); }
.card__kicker { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; color: var(--brand); }
.card h3 { margin-top: .1rem; }
.card p { color: var(--text); }
.card__more { margin-top: auto; padding-top: .6rem; color: var(--link); font-weight: 600; font-size: .95rem; display: inline-flex; gap: .4rem; align-items: center; }
.card__more .arw { transition: transform .15s ease; }
a.card:hover .card__more .arw { transform: translateX(3px); }

/* ---- Listas "de qué nos ocupamos" ---- */
.worklist { list-style: none; padding: 0; display: grid; gap: 0; max-width: 46rem; }
.worklist li {
  display: grid; grid-template-columns: 1.6rem 1fr; align-items: start; gap: .6rem;
  padding: .95rem 0; border-top: 1px solid var(--line); color: var(--text);
}
.worklist li:last-child { border-bottom: 1px solid var(--line); }
.worklist li::before { content: ""; margin-top: .62em; width: .85rem; height: 2px; background: var(--brand); }

/* ---- Bandas de contenido ---- */
.band { background: var(--surface); border-block: 1px solid var(--line); }
.two-col { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(1.5rem, 5vw, 4rem); align-items: start; }
@media (max-width: 820px) { .two-col { grid-template-columns: 1fr; gap: 1.4rem; } }
.col-title h2 { margin-bottom: .4rem; }

/* ---- Principios ---- */
.principles { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.6rem 2.4rem; }
@media (max-width: 720px) { .principles { grid-template-columns: 1fr; } }
.principle h3 { font-size: 1.08rem; margin-bottom: .35rem; }
.principle p { color: var(--muted); max-width: 40ch; }
.principle .num { font-family: var(--font-mono); font-size: .72rem; color: var(--accent); letter-spacing: .12em; }

/* ---- CTA ---- */
.cta { text-align: center; }
.cta h2 { max-width: 20ch; margin-inline: auto; }
.cta .lead { margin-inline: auto; margin-top: .9rem; }
.cta .hero__actions { justify-content: center; margin-top: 1.8rem; }

/* ---- Contacto ---- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(1.6rem, 5vw, 3.5rem); align-items: start; }
@media (max-width: 820px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-methods { display: grid; gap: 1rem; }
.contact-method { display: flex; flex-direction: column; gap: .2rem; padding: 1.1rem 1.2rem; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
.contact-method .k { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.contact-method .v { font-size: 1.1rem; color: var(--ink); font-weight: 600; }
.contact-method a.v:hover { color: var(--brand); }

form.contact { display: grid; gap: .95rem; }
.field { display: grid; gap: .35rem; }
.field label { font-size: .85rem; color: var(--muted); font-weight: 600; }
.field input, .field textarea {
  background: var(--surface); border: 1px solid var(--line); border-radius: 8px;
  padding: .7rem .85rem; color: var(--ink); width: 100%;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--focus); box-shadow: 0 0 0 3px color-mix(in srgb, var(--focus) 22%, transparent); }
.field textarea { min-height: 8rem; resize: vertical; }
.form-note { font-size: .82rem; color: var(--muted); }

/* ---- Pie ---- */
.site-footer { margin-top: auto; background: var(--footer-bg); color: var(--footer-ink); }
.site-footer a { color: var(--footer-ink); }
.site-footer a:hover { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 2rem; padding-block: clamp(2.5rem, 5vw, 3.5rem); }
@media (max-width: 720px) { .footer-grid { grid-template-columns: 1fr; gap: 1.6rem; } }
.footer-brand { font-weight: 800; letter-spacing: .05em; text-transform: uppercase; font-size: 1.1rem; }
.footer-brand .brand__dot { color: var(--accent); }
.footer-col h4 { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; color: var(--footer-muted); font-weight: 600; margin-bottom: .8rem; }
.footer-col ul { list-style: none; padding: 0; display: grid; gap: .5rem; }
.footer-col p { color: var(--footer-muted); max-width: 34ch; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding-block: 1.2rem; display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; justify-content: space-between; color: var(--footer-muted); font-size: .85rem; }

/* ---- Utilidades ---- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.section-head { max-width: 46rem; margin-bottom: 2.2rem; }
.section-head .eyebrow { margin-bottom: 1rem; }

/* ---- Movimiento reducido ---- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}