/* =============================================================
   ATENEA INGENIEROS — styles.css
   1. Tokens
   2. Reset & base
   3. Utilities
   4. Typography
   5. Components (nav, buttons, cards, form)
   6. Sections
   7. Effects (reveal, hover)
   8. Responsive
   9. Reduced-motion
   ============================================================= */

/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --bg:           #ffffff;
  --bg-alt:       #f1f0ec;
  --ink:          #15171b;
  --ink-2:        #3d4045;
  --concrete:     #83868a;
  --concrete-lt:  #d8d7d2;
  --line:         rgba(21, 23, 27, 0.13);
  --line-strong:  rgba(21, 23, 27, 0.28);

  --dark-bg:      #15171b;
  --dark-bg-2:    #1d2025;
  --dark-ink:     #f2f1ec;
  --dark-mute:    #a6a9ad;
  --dark-line:    rgba(242, 241, 236, 0.14);

  --accent:       #f5c400;
  --accent-ink:   #15171b;

  --display: "Archivo", -apple-system, "Segoe UI", sans-serif;
  --sans:    "Inter", -apple-system, "Segoe UI", sans-serif;
  --mono:    "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  --ease-out:  cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft: cubic-bezier(0.25, 0.46, 0.45, 0.94);

  --nav-h: 72px;
  --gutter: 1.25rem;
  --container: 1360px;
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html {
  -webkit-text-size-adjust: 100%;
  tab-size: 2;
  scroll-behavior: smooth;
}
body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-2);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  overscroll-behavior-y: none;
}
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; }
h1, h2, h3, h4 { text-wrap: balance; line-height: 1.05; letter-spacing: -0.01em; font-family: var(--display); }
ul { list-style: none; padding: 0; }
::selection { background: var(--accent); color: var(--accent-ink); }

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

.skip-link {
  position: fixed; top: -100px; left: 1rem; z-index: 9999;
  padding: .7rem 1.1rem; background: var(--ink); color: var(--dark-ink);
  font-family: var(--mono); font-size: .8rem;
  border-radius: 2px;
}
.skip-link:focus { top: 1rem; }

/* =============================================================
   3. Utilities
   ============================================================= */
.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.section { padding-block: clamp(3.5rem, 7vw, 6.5rem); }
.section--tight { padding-block: clamp(2.5rem, 5vw, 4rem); }
.section--alt { background: var(--bg-alt); }
.section--dark { background: var(--dark-bg); color: var(--dark-mute); }
.section--dark h2, .section--dark h3 { color: var(--dark-ink); }

.kicker {
  display: flex; align-items: center; gap: .6rem;
  font-family: var(--mono); font-size: .78rem; letter-spacing: .06em;
  color: var(--concrete); text-transform: uppercase;
  margin-bottom: 1.1rem;
}
.section--dark .kicker { color: var(--dark-mute); }
.kicker::before {
  content: ""; width: 22px; height: 1px; background: var(--accent);
  flex-shrink: 0;
}

.section-head {
  max-width: 44rem;
  margin-bottom: clamp(2rem, 4vw, 3.25rem);
}
.section-head h2 { font-size: clamp(1.7rem, 3.4vw, 2.6rem); font-weight: 800; }
.section-head p { margin-top: 1rem; font-size: 1.05rem; color: var(--concrete); max-width: 40ch; }
.section--dark .section-head p { color: var(--dark-mute); }

.hairline { border-top: 1px solid var(--line); }
.eyebrow-line { width: 100%; height: 1px; background: var(--line); }

/* =============================================================
   4. Typography
   ============================================================= */
.h-display {
  font-family: var(--display);
  font-weight: 800;
}

/* =============================================================
   5. Components
   ============================================================= */

/* --- Nav --- */
.nav {
  position: fixed; top: 0; inset-inline: 0; z-index: 100;
  height: var(--nav-h);
  display: flex; align-items: center;
  background: rgba(255,255,255,0);
  border-bottom: 1px solid transparent;
  transition: background-color .35s var(--ease-out), border-color .35s var(--ease-out), backdrop-filter .35s var(--ease-out);
}
.nav.is-scrolled {
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom-color: var(--line);
}
.nav-inner {
  width: 100%; display: flex; align-items: center; justify-content: space-between;
  gap: 1.5rem;
}
.nav-logo {
  font-family: var(--display); font-weight: 800; font-size: 1.02rem;
  letter-spacing: -0.01em; white-space: nowrap;
}
.nav-logo span { color: var(--accent); }
.nav-links {
  display: none;
  align-items: center; gap: 2rem;
  font-size: .92rem; font-weight: 500;
}
.nav-link { position: relative; padding: .3rem 0; }
.nav-link::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -1px;
  height: 1px; background: var(--ink);
  transform: scaleX(0); transform-origin: right;
  transition: transform .4s var(--ease-out);
}
.nav-link:hover::after { transform: scaleX(1); transform-origin: left; }
.nav-cta {
  display: none;
}
.nav-toggle {
  display: grid; place-items: center; width: 40px; height: 40px;
  margin-right: -.4rem;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; display: block; width: 20px; height: 2px; background: var(--ink);
  position: relative; transition: transform .3s var(--ease-out), opacity .3s;
}
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after { position: absolute; top: 6px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after { transform: translateY(-6px) rotate(-45deg); }

.nav-mobile {
  position: fixed; inset: var(--nav-h) 0 0 0; z-index: 99;
  background: var(--bg);
  display: flex; flex-direction: column; justify-content: center;
  padding: 2rem var(--gutter) 3rem;
  clip-path: inset(0 0 100% 0);
  transition: clip-path .55s var(--ease-soft);
}
.nav-mobile.is-open { clip-path: inset(0 0 0 0); }
.nav-mobile ul { display: flex; flex-direction: column; gap: 1.6rem; }
.nav-mobile a { font-family: var(--display); font-size: 1.7rem; font-weight: 700; }
.nav-mobile .btn { margin-top: 2rem; align-self: flex-start; }

/* --- Buttons --- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .85rem 1.5rem;
  font-size: .92rem; font-weight: 600; letter-spacing: .01em;
  border: 1px solid transparent;
  transition: transform .3s var(--ease-soft), background-color .3s var(--ease-out), color .3s var(--ease-out), border-color .3s;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent); color: var(--accent-ink);
}
.btn-primary:hover { transform: translateY(-2px); background: #ffd21f; }
.btn-primary:active { transform: translateY(0); }

.btn-outline {
  border-color: var(--line-strong); color: var(--ink);
}
.btn-outline:hover { border-color: var(--ink); background: var(--ink); color: var(--dark-ink); }

.btn-ghost-dark {
  border-color: var(--dark-line); color: var(--dark-ink);
}
.btn-ghost-dark:hover { border-color: var(--accent); color: var(--accent); }

.btn-sm { padding: .6rem 1.1rem; font-size: .82rem; }

/* --- Cards / photo blocks --- */
.photo-block {
  position: relative;
  overflow: hidden;
  background: var(--bg-alt);
  aspect-ratio: 4 / 3;
}
.photo-block img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  transition: transform 1s var(--ease-soft);
}
.photo-block:hover img { transform: scale(1.04); }
.photo-block::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(21,23,27,0) 40%, rgba(21,23,27,.78) 100%);
  pointer-events: none;
}
.photo-block-content {
  position: absolute; left: 0; right: 0; bottom: 0; z-index: 1;
  padding: 1.5rem;
  color: var(--dark-ink);
}
.photo-block-content h3 {
  font-size: 1.05rem; font-weight: 700; margin-bottom: .5rem;
}
.photo-block-content p {
  font-size: .88rem; color: rgba(242,241,236,.82); max-width: 34ch;
}

.compact-card {
  background: var(--ink); color: var(--dark-mute);
  padding: 1.75rem;
  display: flex; flex-direction: column; justify-content: space-between;
  min-height: 100%;
}
.compact-card h3 { color: var(--dark-ink); font-size: 1.05rem; font-weight: 700; margin-bottom: .6rem; }
.compact-card p { font-size: .88rem; }
.compact-card .tag {
  font-family: var(--mono); font-size: .72rem; color: var(--accent);
  text-transform: uppercase; letter-spacing: .05em; margin-top: 1.25rem;
}

/* --- Work index cards --- */
.work-card {
  border: 1px solid var(--line);
  display: flex; flex-direction: column;
}
.work-card figure { aspect-ratio: 4/3; overflow: hidden; position: relative; }
.work-card img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(.15); transition: transform 1s var(--ease-soft), filter .5s; }
.work-card:hover img { transform: scale(1.04); filter: grayscale(0); }
.work-card-body { padding: 1.25rem 1.35rem 1.5rem; border-top: 1px solid var(--line); }
.work-card-body .wc-type { font-weight: 700; font-size: .98rem; margin-bottom: .35rem; }
.work-card-body .wc-loc {
  font-family: var(--mono); font-size: .74rem; letter-spacing: .04em;
  color: var(--concrete); text-transform: uppercase; margin-bottom: .7rem;
  display: flex; align-items: center; gap: .4rem;
}
.work-card-body .wc-loc::before { content: "◇"; color: var(--accent); font-size: .7rem; }
.work-card-body .wc-scope { font-size: .88rem; color: var(--ink-2); }

/* --- Form --- */
.field {
  display: flex; flex-direction: column; gap: .45rem;
}
.field label {
  font-family: var(--mono); font-size: .74rem; letter-spacing: .05em;
  text-transform: uppercase; color: var(--dark-mute);
}
.field input, .field select, .field textarea {
  width: 100%;
  background: var(--dark-bg-2);
  border: 1px solid var(--dark-line);
  color: var(--dark-ink);
  padding: .85rem 1rem;
  font-family: var(--sans); font-size: .95rem;
  transition: border-color .25s;
}
.field input::placeholder, .field textarea::placeholder { color: rgba(242,241,236,.35); }
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--accent); outline: none;
}
.field textarea { resize: vertical; min-height: 110px; }

.file-drop {
  border: 1px dashed var(--dark-line);
  padding: 1.5rem 1.25rem;
  text-align: center;
  transition: border-color .25s, background-color .25s;
  cursor: pointer;
}
.file-drop.is-dragover { border-color: var(--accent); background: rgba(245,196,0,.06); }
.file-drop input[type="file"] { display: none; }
.file-drop .fd-title { font-weight: 600; color: var(--dark-ink); font-size: .95rem; }
.file-drop .fd-sub { font-size: .78rem; color: var(--dark-mute); margin-top: .35rem; }
.file-list {
  margin-top: .85rem; display: flex; flex-direction: column; gap: .4rem;
}
.file-list li {
  font-family: var(--mono); font-size: .78rem; color: var(--dark-ink);
  display: flex; justify-content: space-between; gap: .75rem;
  padding: .4rem .6rem; background: var(--dark-bg-2); border: 1px solid var(--dark-line);
}
.file-list button { color: var(--accent); font-size: .78rem; }

.form-grid {
  display: grid; grid-template-columns: 1fr; gap: 1.15rem;
}

.form-submit {
  position: relative;
  display: inline-flex; align-items: center; justify-content: center;
}
.form-submit .fs-spinner, .form-submit .fs-check {
  position: absolute; inset: 0; display: grid; place-items: center; opacity: 0;
}
.form-submit.is-sending .fs-label { opacity: 0; }
.form-submit.is-sending .fs-spinner { opacity: 1; }
.fs-spinner::after {
  content: ""; width: 16px; height: 16px;
  border: 1.5px solid rgba(21,23,27,.35); border-top-color: var(--accent-ink);
  border-radius: 50%; animation: spin .85s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.cta-notice {
  border: 1px solid var(--accent); padding: 1.5rem; margin-top: 1.5rem;
  display: none;
}
.cta-notice.is-visible { display: block; }
.cta-notice h3 { color: var(--dark-ink); font-size: 1.15rem; margin-bottom: .5rem; }
.cta-notice p { font-size: .92rem; color: var(--dark-mute); }
.cta-notice.is-error { border-color: var(--concrete-lt); }

/* =============================================================
   6. Sections
   ============================================================= */

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex; align-items: flex-end;
  padding-top: var(--nav-h);
  color: var(--dark-ink);
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; z-index: -2; }
.hero-bg img {
  width: 100%; height: 100%; object-fit: cover;
  animation: heroZoom 34s ease-in-out infinite alternate;
}
@keyframes heroZoom {
  from { transform: scale(1.02); }
  to   { transform: scale(1.09); }
}
.hero-tint {
  position: absolute; inset: 0; z-index: -1;
  background:
    linear-gradient(180deg, rgba(21,23,27,.55) 0%, rgba(21,23,27,.35) 32%, rgba(21,23,27,.55) 68%, rgba(21,23,27,.92) 100%);
}
.hero-inner { width: 100%; padding-block: clamp(2.5rem, 8vh, 5rem); }
.hero-kicker {
  font-family: var(--mono); font-size: .8rem; letter-spacing: .07em;
  text-transform: uppercase; color: var(--accent);
  margin-bottom: 1.4rem;
  display: flex; align-items: center; gap: .6rem;
}
.hero-title {
  font-size: clamp(2.4rem, 7.2vw, 5.6rem);
  font-weight: 800;
  line-height: .98;
  max-width: 16ch;
  text-transform: uppercase;
}
.hero-sub {
  margin-top: 1.5rem;
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  color: rgba(242,241,236,.86);
  max-width: 46ch;
  font-weight: 400;
}
.hero-loc {
  margin-top: .85rem;
  font-family: var(--mono); font-size: .82rem; color: rgba(242,241,236,.6);
  letter-spacing: .04em;
}
.hero-actions {
  margin-top: 2.25rem;
  display: flex; flex-wrap: wrap; gap: .9rem;
}
.hero-scroll {
  position: absolute; right: var(--gutter); bottom: 1.75rem; z-index: 1;
  display: none; flex-direction: column; align-items: center; gap: .6rem;
  font-family: var(--mono); font-size: .7rem; color: rgba(242,241,236,.55);
  letter-spacing: .08em; text-transform: uppercase;
}
.hero-scroll-line { width: 1px; height: 34px; background: rgba(242,241,236,.35); overflow: hidden; position: relative; }
.hero-scroll-line::after {
  content: ""; position: absolute; left: 0; top: -100%; width: 100%; height: 100%;
  background: var(--accent); animation: scrollLine 2.2s ease-in-out infinite;
}
@keyframes scrollLine { 0% { top: -100%; } 60% { top: 100%; } 100% { top: 100%; } }

/* --- Capacidad --- */
.capacidad-lede {
  max-width: 46rem; font-size: clamp(1.15rem, 2.2vw, 1.55rem);
  font-weight: 600; color: var(--dark-ink); line-height: 1.35;
  margin-bottom: 3rem;
}
.capacidad-lede em { color: var(--accent); font-style: normal; }

.converge {
  display: grid; gap: 1px;
  background: var(--dark-line);
  border: 1px solid var(--dark-line);
}
.converge-col {
  background: var(--dark-bg);
  padding: 2rem 1.5rem;
  text-align: center;
}
.converge-col .cc-num {
  font-family: var(--mono); font-size: .74rem; color: var(--accent);
  margin-bottom: .9rem; letter-spacing: .05em;
}
.converge-col h3 {
  color: var(--dark-ink); font-size: 1.15rem; font-weight: 700;
  letter-spacing: .02em;
}
.converge-result {
  background: var(--accent); color: var(--accent-ink);
  padding: 2rem 1.5rem; text-align: center;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
}
.converge-result span {
  font-family: var(--display); font-weight: 800; font-size: 1.35rem;
  letter-spacing: .03em;
}
.converge-result small {
  font-family: var(--mono); font-size: .68rem; margin-top: .5rem;
  text-transform: uppercase; letter-spacing: .06em;
}

/* --- Servicios grid --- */
.servicios-grid {
  display: grid; gap: 1rem;
  grid-template-columns: 1fr;
}

/* --- Maquinaria --- */
.maquinaria-layout {
  display: grid; gap: 2.5rem;
}
.machinery-list {
  display: grid; grid-template-columns: 1fr 1fr; gap: .75rem 1.5rem;
}
.machinery-list li {
  display: flex; align-items: baseline; gap: .6rem;
  font-size: .95rem; padding-block: .5rem;
  border-bottom: 1px solid var(--line);
}
.machinery-list li::before {
  content: ""; width: 6px; height: 6px; background: var(--accent);
  flex-shrink: 0; transform: translateY(-1px);
}
.maquinaria-figure { position: relative; aspect-ratio: 16/10; overflow: hidden; }
.maquinaria-figure img { width: 100%; height: 100%; object-fit: cover; }

/* --- Obras grid --- */
.works-grid {
  display: grid; gap: 1.25rem; grid-template-columns: 1fr;
}

/* --- Cómo empezamos --- */
.pasos-grid {
  display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line);
  grid-template-columns: 1fr;
}
.paso { background: var(--bg); padding: 1.75rem 1.5rem; }
.paso-num { font-family: var(--mono); font-size: 1.4rem; color: var(--accent); margin-bottom: .9rem; }
.paso h3 { font-size: 1rem; font-weight: 700; margin-bottom: .6rem; }
.paso p { font-size: .88rem; color: var(--concrete); }

/* --- Modalidades --- */
.modalidades-grid {
  display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line);
}
.modalidad {
  background: var(--bg); padding: 1.75rem 1.5rem;
}
.modalidad .mod-num { font-family: var(--mono); font-size: .74rem; color: var(--concrete); margin-bottom: .8rem; }
.modalidad h3 { font-size: 1rem; font-weight: 700; margin-bottom: .6rem; }
.modalidad p { font-size: .88rem; color: var(--concrete); }
.modalidad--note { background: var(--bg-alt); }
.modalidad--note p { font-style: normal; }

/* --- Sedes --- */
.sedes-grid {
  display: grid; gap: 1px; background: var(--dark-line); border: 1px solid var(--dark-line);
  grid-template-columns: 1fr;
}
.sede {
  background: var(--dark-bg-2); padding: 2.25rem 1.75rem;
}
.sede .sede-tag {
  font-family: var(--mono); font-size: .74rem; color: var(--accent);
  text-transform: uppercase; letter-spacing: .06em; margin-bottom: 1rem;
}
.sede h3 { color: var(--dark-ink); font-size: 1.6rem; font-weight: 800; margin-bottom: 1.1rem; }
.sede address { font-style: normal; font-size: .95rem; line-height: 1.7; }
.sede address strong { display: block; color: var(--dark-ink); font-weight: 600; }
.sede-desc { margin-top: 1.1rem; font-size: .88rem; color: var(--dark-mute); max-width: 40ch; }

/* --- CTA / contacto --- */
.cta-head {
  max-width: 42rem; margin-bottom: 2.75rem;
}
.cta-head h2 {
  color: var(--dark-ink); font-size: clamp(1.8rem, 3.8vw, 3rem); font-weight: 800;
  text-transform: uppercase;
}
.cta-head p { margin-top: 1.1rem; color: var(--dark-mute); font-size: 1.02rem; max-width: 42ch; }
.cta-direct {
  display: flex; flex-wrap: wrap; gap: .75rem 1.75rem; margin-top: 1.75rem;
}
.cta-direct a {
  display: inline-flex; align-items: center; gap: .55rem;
  font-family: var(--mono); font-size: .92rem; color: var(--dark-ink);
  padding-bottom: .2rem; border-bottom: 1px solid var(--dark-line);
  transition: border-color .3s, color .3s;
}
.cta-direct a:hover { border-color: var(--accent); color: var(--accent); }
.cta-formats {
  margin-top: 1.5rem; font-family: var(--mono); font-size: .72rem;
  color: var(--dark-mute); letter-spacing: .04em; text-transform: uppercase;
}

/* --- Footer --- */
.footer {
  background: var(--dark-bg); color: var(--dark-mute);
  padding-block: 3rem 2rem;
  border-top: 1px solid var(--dark-line);
}
.footer-top {
  display: grid; gap: 2.25rem; padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--dark-line);
}
.footer-brand .nav-logo { color: var(--dark-ink); }
.footer-brand p { margin-top: .9rem; font-size: .88rem; max-width: 34ch; }
.footer-col h4 {
  font-family: var(--mono); font-size: .72rem; text-transform: uppercase;
  letter-spacing: .06em; color: var(--dark-ink); margin-bottom: .9rem;
}
.footer-col ul { display: flex; flex-direction: column; gap: .55rem; }
.footer-col a, .footer-col address { font-size: .88rem; font-style: normal; line-height: 1.6; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  padding-top: 1.75rem;
  display: flex; flex-direction: column; gap: .75rem;
  font-size: .78rem; color: var(--dark-mute);
}
.footer-bottom .legal-links { display: flex; flex-wrap: wrap; gap: 1.1rem; }
.footer-bottom .legal-links a:hover { color: var(--accent); }

/* --- Legal pages (aviso-legal, privacidad, cookies) --- */
.legal-page { padding-top: calc(var(--nav-h) + 3rem); padding-bottom: 5rem; }
.legal-page .container { max-width: 780px; }
.legal-page h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 800; margin-bottom: 2rem; }
.legal-page h2 { font-size: 1.15rem; font-weight: 700; margin-top: 2.25rem; margin-bottom: .75rem; }
.legal-page p, .legal-page li { font-size: .96rem; color: var(--ink-2); margin-bottom: .85rem; }
.legal-page ul { list-style: disc; padding-left: 1.3rem; }
.legal-page a { text-decoration: underline; text-underline-offset: 2px; }
.legal-back {
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: var(--mono); font-size: .82rem; margin-bottom: 2.5rem;
}

/* =============================================================
   7. Effects
   ============================================================= */
[data-reveal] {
  opacity: 0; transform: translateY(22px);
  transition: opacity .75s var(--ease-soft), transform .75s var(--ease-soft);
}
[data-reveal].is-revealed { opacity: 1; transform: none; }
.reveal[data-split] { opacity: 1; transform: none; }

/* =============================================================
   8. Responsive
   ============================================================= */
@media (min-width: 540px) {
  .machinery-list { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 720px) {
  :root { --gutter: 2rem; }
  .hero-actions { gap: 1.1rem; }
  .modalidades-grid { grid-template-columns: 1fr 1fr; }
  .pasos-grid { grid-template-columns: 1fr 1fr; }
  .sedes-grid { grid-template-columns: 1fr 1fr; }
  .form-grid { grid-template-columns: 1fr 1fr; }
  .form-grid .field--full { grid-column: 1 / -1; }
  .footer-top { grid-template-columns: 1.3fr 1fr 1fr 1fr; }
}

@media (min-width: 960px) {
  :root { --nav-h: 84px; }
  .nav-links { display: flex; }
  .nav-cta { display: inline-flex; }
  .nav-toggle { display: none; }

  .converge { grid-template-columns: 1fr 1fr 1fr 1fr; }
  .converge-result { grid-column: 4; grid-row: 1; }

  .servicios-grid {
    grid-template-columns: repeat(12, 1fr);
    grid-auto-rows: 340px;
  }
  .servicios-grid .sv-item:nth-child(1) { grid-column: span 7; grid-row: span 1; }
  .servicios-grid .sv-item:nth-child(2) { grid-column: span 5; grid-row: span 1; }
  .servicios-grid .sv-item:nth-child(3) { grid-column: span 5; grid-row: span 1; }
  .servicios-grid .sv-item:nth-child(4) { grid-column: span 4; grid-row: span 1; }
  .servicios-grid .sv-item:nth-child(5) { grid-column: span 3; grid-row: span 1; }
  .servicios-grid .photo-block, .servicios-grid .compact-card { height: 100%; aspect-ratio: auto; }

  .maquinaria-layout { grid-template-columns: 1fr 1.2fr; align-items: center; }

  .works-grid { grid-template-columns: repeat(4, 1fr); }
  .pasos-grid { grid-template-columns: repeat(4, 1fr); }

  .hero-scroll { display: flex; }
}

@media (min-width: 1280px) {
  .hero-title { max-width: 20ch; }
}

/* =============================================================
   9. Reduced motion — only intrusive effects gated
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-bg img { animation: none; }
  .hero-scroll-line::after { animation: none; }
  /* Do NOT disable: reveals, hovers, nav underline, photo-block zoom-on-hover */
}