/* =============================================================
   ALLENIA — Ingeniería y Soluciones Energéticas
   Design tokens — official brand values, do not alter arbitrarily
   ============================================================= */
:root {
  --navy:        #102C38;   /* primary — dominant surface color (deep petrol blue) */
  --navy-2:      #10222D;   /* subtle tint of navy for section/card layering */
  --navy-3:      #16303D;   /* card / input surfaces */
  --white:       #F7F9FA;
  --gray-light:  #D9E0E3;
  --gray-steel:  #6E7479;
  --accent:      #2BA88A;   /* energy accent — use sparingly */
  --accent-dark: #22886F;

  --line:        rgba(217,224,227,.14);
  --line-strong: rgba(217,224,227,.26);

  --display: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --wordmark: 'Cinzel', Georgia, serif;
  --sans: 'Avenir Next', 'Avenir', 'Helvetica Neue', Arial, sans-serif;

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --nav-h: 80px;
  --radius: 6px;
  color-scheme: dark;
}

/* =============================================================
   Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; overflow-x: clip; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  font-weight: 400;
  background: var(--navy);
  color: var(--gray-light);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: clip;
}

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: 1.15; color: var(--white); font-weight: 400; }
ul { list-style: none; padding: 0; }
::selection { background: var(--accent); color: var(--navy); }

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

.skip-link {
  position: fixed; top: -100px; left: 1rem; z-index: 9999;
  padding: .7rem 1.1rem; background: var(--white); color: var(--navy);
  border-radius: var(--radius); font-weight: 600; font-size: .9rem;
  transition: top .3s var(--ease);
}
.skip-link:focus { top: 1rem; }

/* =============================================================
   Custom cursor (desktop / fine-pointer only)
   ============================================================= */
.cursor {
  position: fixed; top: 0; left: 0; z-index: 9999;
  width: 18px; height: 18px;
  border: 1px solid rgba(247,249,250,.85);
  border-radius: 50%;
  pointer-events: none;
  opacity: 0;
  transform: translate3d(-50%, -50%, 0);
  transition: width .25s var(--ease), height .25s var(--ease), border-color .25s var(--ease), opacity .25s var(--ease);
  display: none;
}
.cursor::after {
  content: ""; position: absolute; top: 50%; left: 50%;
  width: 3px; height: 3px; border-radius: 50%;
  background: var(--accent);
  transform: translate(-50%, -50%);
}
.cursor.is-ready { opacity: 1; }
.cursor.is-interactive { width: 34px; height: 34px; border-color: var(--accent); }
@media (hover: hover) and (pointer: fine) {
  .cursor { display: block; }
  html.has-cursor, html.has-cursor a, html.has-cursor button { cursor: none; }
}

/* =============================================================
   Utilities
   ============================================================= */
.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;
}

.container { max-width: 1240px; margin-inline: auto; padding-inline: 1.25rem; }
@media (min-width: 768px)  { .container { padding-inline: 2rem; } }
@media (min-width: 1280px) { .container { padding-inline: 2.5rem; } }

.eyebrow {
  display: inline-flex; align-items: center; gap: .6rem;
  font-family: var(--sans);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}
.eyebrow::before {
  content: ""; display: inline-block; width: 0; height: 1px; background: var(--accent);
  transition: width .6s var(--ease) .1s;
}
.eyebrow.is-revealed::before { width: 18px; }

.section { padding-block: clamp(3.25rem, 6vw, 5.5rem); }
.section-head { max-width: 640px; margin-bottom: clamp(2rem, 4vw, 3rem); }
.section-title { font-family: var(--display); font-weight: 400; font-size: clamp(1.8rem, 3.2vw, 2.6rem); }
.section-sub { margin-top: 1rem; font-size: 1.05rem; color: var(--gray-steel); max-width: 54ch; }

/* =============================================================
   Reveal-on-scroll (fade-up, extremely subtle)
   ============================================================= */
[data-reveal] {
  opacity: 0; transform: translateY(20px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}
[data-reveal].is-revealed { opacity: 1; transform: none; }

/* =============================================================
   Buttons
   ============================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: .5em; padding: .9rem 1.6rem;
  font-family: var(--sans); font-size: .92rem; font-weight: 600; letter-spacing: .02em;
  border-radius: var(--radius); white-space: nowrap;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), background-color .3s, color .3s, border-color .3s;
}
.btn-sm { padding: .65rem 1.25rem; font-size: .85rem; }
.btn-block { width: 100%; }

.btn-primary { background: var(--accent); color: var(--navy); }
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 14px 28px -12px rgba(43,168,138,.45); }
.btn-primary:active { transform: translateY(0); }

.btn-ghost { background: transparent; color: var(--white); border: 1px solid var(--line-strong); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.btn-dark { background: var(--navy); color: var(--white); }
.btn-dark:hover { background: var(--navy-2); transform: translateY(-2px); }

.link-arrow { display: inline-flex; align-items: center; gap: .4em; color: var(--accent); font-weight: 600; font-size: .92rem; }
.link-arrow span { transition: transform .3s var(--ease); }
.link-arrow:hover span { transform: translateX(3px); }

/* =============================================================
   Navbar
   ============================================================= */
.nav {
  position: fixed; inset-inline: 0; top: 0; z-index: 200;
  height: var(--nav-h);
  display: flex; align-items: center;
  background: transparent;
  transition: background-color .4s var(--ease), box-shadow .4s var(--ease);
}
.nav.is-scrolled {
  background: rgba(16,44,56,.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 var(--line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; width: 100%; gap: 1.5rem; }

.brand { display: inline-flex; align-items: center; gap: .6rem; }
.brand-mark { width: 34px; height: auto; flex-shrink: 0; }
.brand-word { font-family: var(--wordmark); font-size: 1.15rem; letter-spacing: .1em; color: var(--white); }

.nav-links { display: none; align-items: center; gap: clamp(1.4rem, 2vw, 2.2rem); margin-inline: auto; }
@media (min-width: 960px) { .nav-links { display: flex; } }
.nav-link {
  position: relative; font-size: .88rem; font-weight: 500; letter-spacing: .04em; text-transform: uppercase;
  color: var(--gray-light); padding-block: .3rem;
  transition: color .3s var(--ease);
}
.nav-link::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px;
  height: 1px; background: var(--accent);
  transform: scaleX(0); transform-origin: right;
  transition: transform .35s var(--ease);
}
.nav-link:hover { color: var(--white); }
.nav-link:hover::after { transform: scaleX(1); transform-origin: left; }

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

.nav-burger { display: grid; place-items: center; gap: 5px; width: 40px; height: 40px; }
@media (min-width: 960px) { .nav-burger { display: none; } }
.nav-burger span { width: 22px; height: 1.5px; background: var(--white); transition: transform .3s var(--ease), opacity .3s; }
.nav-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.nav-mobile {
  position: fixed; inset: 0; z-index: 190;
  background: var(--navy);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2.5rem;
  clip-path: inset(0 0 100% 0);
  transition: clip-path .5s var(--ease);
}
.nav-mobile[data-open="true"] { clip-path: inset(0); }
.nav-mobile nav { display: flex; flex-direction: column; align-items: center; gap: 1.6rem; }
.nav-mobile a { font-family: var(--display); font-size: 1.4rem; color: var(--white); }
@media (min-width: 960px) { .nav-mobile { display: none; } }

/* =============================================================
   Hero
   ============================================================= */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex; align-items: center;
  padding-top: var(--nav-h);
  overflow: clip;
}
.hero-bg { position: absolute; inset: 0; z-index: -1; overflow: hidden; }
.hero-gradient {
  position: absolute; inset: 0;
  background:
    radial-gradient(60% 55% at 78% 22%, rgba(43,168,138,.16), transparent 60%),
    linear-gradient(165deg, #17333F 0%, #102C38 55%, #102C38 100%);
}
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, transparent, black 30%, black 70%, transparent);
  opacity: .35;
}

.hero-inner { max-width: 760px; position: relative; padding-block: 2.5rem; }
.hero-title {
  font-family: var(--display); font-weight: 400;
  font-size: clamp(2rem, 4.6vw, 3.6rem);
  line-height: 1.18;
  color: var(--white);
}
.hero-sub {
  margin-top: 1.75rem; font-size: clamp(1.02rem, 1.5vw, 1.18rem);
  color: var(--gray-light); max-width: 56ch; line-height: 1.6;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2.5rem; }

/* =============================================================
   Pilares
   ============================================================= */
.pilares { padding-block: clamp(2.5rem, 5vw, 4rem); border-bottom: 1px solid var(--line); }
.pilares-grid { display: grid; gap: 2.5rem; grid-template-columns: 1fr; }
@media (min-width: 640px) { .pilares-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .pilares-grid { grid-template-columns: repeat(4, 1fr); gap: 2rem; } }
.pilar-icon { width: 34px; height: 34px; color: var(--accent); margin-bottom: 1.1rem; }
.pilar h3 { font-family: var(--display); font-size: 1.15rem; }
.pilar p { margin-top: .6rem; color: var(--gray-steel); font-size: .92rem; line-height: 1.55; max-width: 32ch; }

/* =============================================================
   Soluciones — elevated as a primary focus of the homepage
   ============================================================= */
.solutions {
  position: relative; overflow: clip;
  padding-block: clamp(4rem, 7vw, 6.5rem);
}
.solutions::before {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(65% 55% at 50% 0%, black, transparent 75%);
  opacity: .3;
}
.solutions .container { position: relative; z-index: 1; }
.solutions .section-head { max-width: 720px; }
.solutions .section-title { font-size: clamp(2rem, 3.6vw, 2.9rem); }

.solutions-grid { display: grid; gap: 1.5rem; grid-template-columns: 1fr; }
@media (min-width: 768px) { .solutions-grid { grid-template-columns: repeat(3, 1fr); } }

.solution-card {
  position: relative;
  background: var(--navy-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color .4s var(--ease), transform .4s var(--ease);
}
.solution-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: var(--accent);
  transform: scaleX(0); transform-origin: left;
  transition: transform .5s var(--ease);
}
.solution-card::after {
  content: ""; position: absolute; bottom: 10px; right: 10px; width: 10px; height: 10px;
  border-bottom: 1px solid var(--accent); border-right: 1px solid var(--accent);
  opacity: 0; transition: opacity .4s var(--ease);
}
.solution-card:hover { border-color: var(--line-strong); transform: translateY(-4px); }
.solution-card:hover::before { transform: scaleX(1); }
.solution-card:hover::after { opacity: .7; }

.solution-card-media { aspect-ratio: 16 / 10; overflow: hidden; }
.solution-card-media img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .5s var(--ease); }
.solution-card:hover .solution-card-media img { transform: scale(1.04); }

.solution-card-body { padding: 1.75rem; }
.solution-card-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.solution-category {
  display: flex; align-items: center; gap: .55rem;
  font-size: .74rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--accent);
}
.solution-category::before {
  content: ""; width: 14px; height: 1px; background: var(--accent); flex-shrink: 0;
  transition: width .4s var(--ease);
}
.solution-card:hover .solution-category::before { width: 22px; }
.solution-index { font-size: .72rem; font-weight: 600; letter-spacing: .05em; color: var(--gray-steel); transition: color .4s var(--ease); }
.solution-card:hover .solution-index { color: var(--accent); }

.solution-card-body h3 { font-family: var(--display); font-size: 1.25rem; margin-top: .6rem; transition: transform .3s var(--ease); }
.solution-card:hover .solution-card-body h3 { transform: translateX(4px); }
.solution-desc { margin-top: .8rem; color: var(--gray-steel); font-size: .93rem; line-height: 1.55; }
.solution-card-body .link-arrow { margin-top: 1.4rem; }

/* =============================================================
   Nosotros
   ============================================================= */
.about-grid { display: grid; gap: 3rem; align-items: center; }
@media (min-width: 960px) { .about-grid { grid-template-columns: 1.1fr .9fr; gap: 4rem; } }
.about-text { max-width: 640px; }

.about-visual { position: relative; aspect-ratio: 5/6; }
@media (max-width: 959px) { .about-visual { aspect-ratio: 16/9; max-width: 420px; margin-inline: auto; } }
.commitment-lines { width: 100%; height: 100%; overflow: visible; }
.c-horizon {
  stroke: var(--line-strong); stroke-width: 1; opacity: 0;
  transition: opacity 1.2s var(--ease) .1s;
}
.about-visual.is-revealed .c-horizon { opacity: .5; }
.c-line {
  fill: none; stroke: var(--line-strong); stroke-width: 1;
  stroke-linecap: round; stroke-linejoin: round;
  stroke-dasharray: 700; stroke-dashoffset: 700;
  transition: stroke-dashoffset 1.8s var(--ease);
}
.about-visual.is-revealed .c-line:nth-of-type(1) { transition-delay: .15s; }
.about-visual.is-revealed .c-line:nth-of-type(2) { transition-delay: .35s; }
.about-visual.is-revealed .c-line { stroke-dashoffset: 0; }
.c-node { fill: var(--accent); opacity: 0; transition: opacity .6s var(--ease) .9s; }
.about-visual.is-revealed .c-node { opacity: 1; }
.c-ring { fill: none; stroke: var(--accent); stroke-width: 1; opacity: 0; transition: opacity 1s var(--ease) 1s; }
.about-visual.is-revealed .c-ring { opacity: .5; animation: commitmentPulse 5s ease-in-out 1s infinite; }
@media (prefers-reduced-motion: reduce) { .c-ring { animation: none !important; } }
@keyframes commitmentPulse {
  0%, 100% { r: 18; opacity: .45; }
  55% { r: 26; opacity: 0; }
}

.about-p { margin-top: 1.15rem; max-width: 58ch; color: var(--gray-light); }
.about-values { margin-top: 1.75rem; display: grid; gap: .75rem; grid-template-columns: repeat(2, 1fr); max-width: 440px; }
.about-values li {
  display: flex; align-items: center; gap: .65rem;
  font-size: .92rem; font-weight: 500; color: var(--white);
}
.value-bolt { width: 8px; height: 13px; color: var(--accent); flex-shrink: 0; }
.about-text .btn { margin-top: 2.25rem; }

/* =============================================================
   Contacto
   ============================================================= */
.contact-grid { display: grid; gap: 3rem; }
@media (min-width: 960px) { .contact-grid { grid-template-columns: .85fr 1.15fr; gap: 4.5rem; } }

.contact-info { margin-top: 2.25rem; display: grid; gap: 1.25rem; }
.contact-info li { display: flex; flex-direction: column; gap: .3rem; padding-bottom: 1.1rem; border-bottom: 1px solid var(--line); }
.contact-info-label { font-size: .72rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--gray-steel); }
.contact-info a, .contact-info span:not(.contact-info-label) { font-size: 1.02rem; color: var(--white); }
.contact-info a:hover { color: var(--accent); }

.contact-form { background: var(--navy-2); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(1.75rem, 3vw, 2.5rem); display: grid; gap: 1.25rem; position: relative; }
.field-row { display: grid; gap: 1.25rem; }
@media (min-width: 560px) { .field-row { grid-template-columns: 1fr 1fr; } }

.field { display: grid; gap: .5rem; }
.field label { font-size: .8rem; font-weight: 600; letter-spacing: .04em; color: var(--gray-light); }
.field-optional { font-weight: 400; color: var(--gray-steel); text-transform: none; letter-spacing: 0; }
.field input, .field textarea {
  width: 100%; padding: .85rem 1rem; border: 1px solid var(--line-strong); border-radius: 4px;
  background: rgba(247,249,250,.03); color: var(--white); font-family: var(--sans); font-size: .96rem;
  transition: border-color .3s;
}
.field textarea { resize: vertical; min-height: 100px; }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--accent); }

.cta-submit { position: relative; margin-top: .25rem; }
.cta-form-spinner { position: absolute; inset: 0; display: grid; place-items: center; opacity: 0; pointer-events: none; }
.contact-form.is-sending .cta-form-label { opacity: 0; }
.contact-form.is-sending .cta-form-spinner { opacity: 1; }
.cta-form-spinner::after {
  content: ""; width: 16px; height: 16px;
  border: 1.5px solid rgba(16,44,56,.3); border-top-color: var(--navy);
  border-radius: 50%; animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.contact-form.is-sent .cta-submit,
.contact-form.is-sent .field, .contact-form.is-sent .field-row { opacity: 0; pointer-events: none; transition: opacity .3s; }

.cta-success {
  position: absolute; inset: 0; display: grid; place-items: center; text-align: center; padding: 2rem;
  opacity: 0; pointer-events: none;
  transition: opacity .5s var(--ease) .15s;
}
.cta-success.is-visible { opacity: 1; pointer-events: auto; }
.cta-success h3 { font-family: var(--display); font-size: 1.5rem; color: var(--accent); }
.cta-success p { margin-top: .6rem; color: var(--gray-steel); max-width: 32ch; }

/* =============================================================
   Footer
   ============================================================= */
.footer { background: var(--navy-2); border-top: 1px solid var(--line); padding-block: clamp(2.5rem, 5vw, 3.5rem) 2rem; }
.footer-inner { display: grid; gap: 2.5rem; }
@media (min-width: 768px) { .footer-inner { grid-template-columns: 1.3fr .8fr .8fr .9fr; gap: 2rem; } }

.footer-tagline { margin-top: .8rem; color: var(--gray-steel); font-size: .85rem; letter-spacing: .02em; }
.footer-social { display: flex; gap: .9rem; margin-top: 1.5rem; }
.footer-social a { color: var(--gray-steel); transition: color .3s; }
.footer-social a:hover { color: var(--accent); }

.footer-col h4 { font-size: .78rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--gray-steel); margin-bottom: 1.1rem; }
.footer-col { display: flex; flex-direction: column; gap: .8rem; }
.footer-col a, .footer-col span { color: var(--gray-light); font-size: .92rem; width: fit-content; }
.footer-col a:hover { color: var(--accent); }

.footer-bottom {
  margin-top: clamp(2rem, 4vw, 2.75rem); padding-top: 1.5rem; border-top: 1px solid var(--line);
  display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between;
  font-size: .82rem; color: var(--gray-steel);
}
.footer-legal { display: flex; gap: 1.5rem; }
.footer-legal a:hover { color: var(--accent); }

/* =============================================================
   Reduced motion — disable only intrusive movement
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { transition-duration: .01s; }
}