/* =========================================================
   LUDANMAS OBRAS Y PROYECTOS S.A.
   Sistema de diseño: bioingeniería / Sistema Vetiver
   ========================================================= */

/* ---------- Tokens ---------- */
:root{
  /* Colores extraídos directamente del logo real de Ludanmas */
  --forest-deep: #00212C;   /* azul-verdoso muy oscuro del bloque del logo, fondo hero/footer */
  --forest: #003142;        /* azul-verdoso oscuro principal (color exacto del logo) */
  --forest-soft: #0B5C6F;   /* variante media para acentos/iconos */
  --vetiver: #029047;       /* verde exacto de las hojas del logo */
  --vetiver-light: #3CB673; /* verde claro, hover/acentos vivos */
  --sand: #C9A876;          /* tierra / arena, complementa el marrón del logo */
  --sand-soft: #EFE4CE;     /* arena clara, fondos de tarjeta */
  --soil: #5F461B;          /* marrón exacto de las raíces del logo */
  --cream: #F6F4EF;         /* blanco cálido, fondo general */
  --ink: #16211D;           /* texto principal */
  --ink-soft: #4B5450;      /* texto secundario */

  --font-display: "Fraunces", serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", monospace;

  --radius: 14px;
  --max-w: 1180px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

/* ---------- Reset ---------- */
*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--cream);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img, svg{ display:block; max-width:100%; }
a{ color: inherit; text-decoration: none; }
h1,h2,h3{ font-family: var(--font-display); font-weight: 600; line-height: 1.12; margin: 0 0 .5em; color: var(--forest-deep); }
p{ margin: 0 0 1em; }
ul{ list-style: none; margin:0; padding:0; }
button{ font-family: inherit; }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *, *::before, *::after{ animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

:focus-visible{
  outline: 3px solid var(--sand);
  outline-offset: 3px;
}

.skip-link{
  position:absolute; left:-999px; top:auto;
  background: var(--forest-deep); color:#fff; padding:.8em 1.2em; z-index:200; border-radius: 0 0 8px 0;
}
.skip-link:focus{ left:0; top:0; }

.wrap{
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
}

.eyebrow{
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--forest-soft);
  margin: 0 0 .9em;
}
.eyebrow-light{ color: var(--vetiver); }

/* ---------- Botones ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding: .95em 1.8em;
  border-radius: 999px;
  font-weight: 600;
  font-size: .96rem;
  border: 1.5px solid transparent;
  transition: transform .25s var(--ease), background-color .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
  cursor:pointer;
}
.btn-primary{
  background: var(--sand);
  color: var(--forest-deep);
}
.btn-primary:hover{ background:#DDBB88; transform: translateY(-2px); }
.btn-ghost{
  border-color: rgba(246,242,233,.4);
  color: var(--cream);
}
.btn-ghost:hover{ border-color: var(--cream); background: rgba(246,242,233,.08); transform: translateY(-2px); }
.btn-block{ width:100%; }

/* ---------- Header ---------- */
.site-header{
  position: sticky; top:0; z-index: 100;
  background: rgba(18,39,31,.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(246,242,233,.08);
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding-block: .85rem;
}
.brand{ display:flex; align-items:center; gap:.65rem; color: var(--cream); }
.brand-mark{ width:38px; height:38px; flex-shrink:0; border-radius: 8px; overflow:hidden; }
.brand-mark img{ width:100%; height:100%; object-fit: cover; display:block; }
.brand-text{ display:flex; flex-direction:column; line-height:1.15; }
.brand-text strong{ font-family: var(--font-display); font-size: 1.05rem; letter-spacing:.03em; }
.brand-text em{ font-style: normal; font-size: .68rem; color: var(--sand); font-family: var(--font-mono); }

.main-nav{ display:flex; align-items:center; gap: 1.9rem; }
.main-nav a{
  color: rgba(246,242,233,.85);
  font-size: .93rem;
  font-weight: 500;
  transition: color .2s;
}
.main-nav a:hover{ color: var(--sand); }
.nav-phone{
  display:flex; align-items:center; gap:.45em;
  color: var(--forest-deep) !important;
  background: var(--sand);
  padding: .5em 1em;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: .82rem !important;
}
.nav-phone:hover{ background:#DDBB88; }

.nav-toggle{
  display:none; flex-direction:column; justify-content:center; gap:5px;
  width:38px; height:38px; background:none; border:none; cursor:pointer;
}
.nav-toggle span{ display:block; width:22px; height:2px; background: var(--cream); transition: transform .25s, opacity .25s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1){ transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2){ opacity:0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3){ transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero{
  position: relative;
  background: radial-gradient(140% 100% at 15% 0%, #1E4231 0%, var(--forest-deep) 55%, #0C1C16 100%);
  overflow: hidden;
  padding-block: clamp(3.5rem, 9vw, 7rem) clamp(4rem, 10vw, 7.5rem);
}
.hero-contours{ position:absolute; inset:auto 0 0 0; width:100%; height:200px; }
.hero-inner{
  position: relative; z-index:1;
  display:grid; grid-template-columns: 1.15fr .85fr; gap: clamp(2rem, 5vw, 4rem);
  align-items:center;
}
.hero-copy h1{
  color: var(--cream);
  font-size: clamp(2.1rem, 4.4vw, 3.4rem);
  max-width: 14ch;
}
.hero-lead{
  color: rgba(246,242,233,.78);
  font-size: 1.08rem;
  max-width: 46ch;
}
.hero-actions{ display:flex; flex-wrap:wrap; gap: 1rem; margin: 1.8rem 0 2.6rem; }

.hero-stats{ display:flex; gap: clamp(1.4rem, 4vw, 2.6rem); flex-wrap:wrap; }
.hero-stats li{ display:flex; flex-direction:column; }
.stat-num{ font-family: var(--font-display); font-size: 1.6rem; color: var(--sand); font-weight:600; }
.stat-label{ font-family: var(--font-mono); font-size: .72rem; color: rgba(246,242,233,.6); text-transform:uppercase; letter-spacing:.05em; }

.hero-diagram{
  filter: drop-shadow(0 20px 40px rgba(0,0,0,.35));
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(246,242,233,.14);
  aspect-ratio: 3 / 4;
}
.hero-diagram img{ width:100%; height:100%; object-fit: cover; display:block; }

/* ---------- Galería de campo (proyectos reales) ---------- */
.field-gallery{ background: var(--cream); padding-block: clamp(3.5rem, 8vw, 5.5rem); }
.gallery-grid{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem; }
.gallery-item{
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4 / 5;
  border: 1px solid rgba(28,58,44,.1);
}
.gallery-item img{
  width:100%; height:100%; object-fit: cover; display:block;
  transition: transform .5s var(--ease);
}
.gallery-item:hover img{ transform: scale(1.06); }
.gallery-caption{
  position:absolute; inset:auto 0 0 0;
  padding: 1.4rem 1.1rem 1rem;
  background: linear-gradient(0deg, rgba(0,33,44,.92) 0%, rgba(0,33,44,0) 100%);
  color: var(--cream);
  font-size: .88rem;
  line-height: 1.4;
}

/* ---------- Sobre nosotros ---------- */
.about{ padding-block: clamp(4rem, 9vw, 6.5rem); }
.about-inner{
  display:grid; grid-template-columns: .8fr 1.2fr; gap: clamp(2rem, 6vw, 4.5rem); align-items:center;
}
.about-media{ border-radius: var(--radius); overflow:hidden; border: 1px solid rgba(28,58,44,.1); aspect-ratio: 4 / 3; }
.about-media img{ width:100%; height:100%; object-fit: cover; display:block; }
.about-copy h2{ font-size: clamp(1.7rem, 3vw, 2.3rem); max-width: 16ch; }
.about-copy p{ color: var(--ink-soft); max-width: 58ch; }

.about-pillars{ display:grid; gap: 1.1rem; margin-top: 1.8rem; }
.pillar{ display:flex; gap:1rem; align-items:flex-start; padding-top: 1.1rem; border-top:1px solid rgba(28,58,44,.14); }
.pillar-tag{ font-family: var(--font-mono); color: var(--sand); background: var(--forest-deep); border-radius:8px; padding:.25em .55em; font-size:.72rem; flex-shrink:0; }
.pillar p{ margin:0; color: var(--ink-soft); font-size: .96rem; }

/* ---------- Servicios ---------- */
.services{ background: var(--sand-soft); padding-block: clamp(4rem, 9vw, 6.5rem); }
.section-head{ max-width: 62ch; margin-bottom: 3rem; }
.section-head h2{ font-size: clamp(1.7rem, 3vw, 2.3rem); }
.section-lead{ color: var(--ink-soft); }

.cards{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 1.6rem; }
.card{
  background: var(--cream);
  border-radius: var(--radius);
  padding: 2.1rem 1.9rem;
  border: 1px solid rgba(28,58,44,.08);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.card:hover{ transform: translateY(-6px); box-shadow: 0 18px 34px rgba(28,58,44,.12); }
.card-icon{
  width:56px; height:56px;
  display:flex; align-items:center; justify-content:center;
  background: var(--forest-deep); color: var(--sand);
  border-radius: 12px; margin-bottom: 1.3rem;
}
.card-icon svg{ width:28px; height:28px; }
.card h3{ font-size: 1.2rem; margin-bottom:.5em; }
.card p{ color: var(--ink-soft); font-size: .95rem; margin:0; }

/* ---------- Franja Sistema Vetiver ---------- */
.vetiver-band{
  background: var(--forest);
  color: var(--cream);
  padding-block: clamp(4rem, 9vw, 6rem);
}
.vetiver-inner{ max-width: 780px; }
.vetiver-inner h2{ color: var(--cream); font-size: clamp(1.7rem, 3vw, 2.3rem); }
.vetiver-text{ color: rgba(246,242,233,.82); font-size: 1.05rem; }
.vetiver-facts{ display:grid; grid-template-columns: repeat(3,1fr); gap: 1.4rem; margin-top: 2rem; }
.fact{
  border-top: 1px solid rgba(246,242,233,.22);
  padding-top: .9rem;
  font-size: .92rem;
  color: rgba(246,242,233,.75);
}
.fact span{ display:block; font-family: var(--font-display); font-size: 1.1rem; color: var(--sand); margin-bottom:.3em; }

/* ---------- Contacto ---------- */
.contact{ background: var(--forest-deep); color: var(--cream); padding-block: clamp(4rem, 9vw, 7rem); }
.contact-inner{ display:grid; grid-template-columns: .9fr 1.1fr; gap: clamp(2rem, 6vw, 4.5rem); }
.contact-info h2{ color: var(--cream); font-size: clamp(1.7rem, 3vw, 2.2rem); max-width: 16ch; }
.contact-lead{ color: rgba(246,242,233,.75); max-width: 42ch; }

.contact-list{ display:grid; gap: 1.3rem; margin-top: 2rem; }
.contact-list li{ display:flex; gap: .9rem; align-items:flex-start; }
.contact-ic{
  width:40px; height:40px; flex-shrink:0;
  display:flex; align-items:center; justify-content:center;
  background: rgba(246,242,233,.08); border-radius: 10px; color: var(--sand);
}
.contact-list strong{ display:block; font-size:.78rem; text-transform:uppercase; letter-spacing:.05em; color: rgba(246,242,233,.55); font-family: var(--font-mono); margin-bottom:.2em; }
.contact-list a, .contact-list span{ font-size: 1.05rem; color: var(--cream); }
.contact-list a:hover{ color: var(--sand); }

/* Formulario */
.contact-form{
  background: var(--cream);
  color: var(--ink);
  border-radius: var(--radius);
  padding: clamp(1.8rem, 4vw, 2.6rem);
}
.contact-form h3{ font-size: 1.3rem; margin-bottom: 1.2rem; }
.field{ margin-bottom: 1.3rem; }
.field label{ display:block; font-size: .85rem; font-weight:600; margin-bottom: .45em; color: var(--forest-deep); }
.field input, .field textarea{
  width:100%;
  padding: .8em .95em;
  border-radius: 9px;
  border: 1.5px solid rgba(28,58,44,.22);
  background: #fff;
  font-family: inherit;
  font-size: .96rem;
  color: var(--ink);
  transition: border-color .2s;
  resize: vertical;
}
.field input:focus, .field textarea:focus{ border-color: var(--forest-soft); outline:none; }
.field.invalid input, .field.invalid textarea{ border-color: #B23A3A; }
.field-error{
  display:block; min-height: 1.1em;
  font-size: .8rem; color: #B23A3A; margin-top: .35em;
}
.form-status{
  margin: 1rem 0 0;
  font-size: .92rem;
  min-height: 1.4em;
}
.form-status.success{ color: var(--forest-soft); font-weight:600; }

/* ---------- Footer ---------- */
.site-footer{ background: #0C1C16; color: rgba(246,242,233,.75); }
.footer-inner{
  display:grid; grid-template-columns: 1.1fr .9fr 1fr; gap: 2rem;
  padding-block: 3rem;
  border-bottom: 1px solid rgba(246,242,233,.08);
}
.footer-brand{ display:flex; gap:.7rem; align-items:flex-start; }
.footer-brand strong{ display:block; color: var(--cream); font-family: var(--font-display); font-size: 1rem; }
.footer-brand p{ margin:.2em 0 0; font-family: var(--font-mono); font-size: .78rem; color: rgba(246,242,233,.5); }
.footer-nav{ display:flex; flex-direction:column; gap:.6rem; }
.footer-nav a:hover{ color: var(--sand); }
.footer-contact{ display:flex; flex-direction:column; gap:.6rem; font-size: .92rem; }
.footer-contact a:hover{ color: var(--sand); }
.footer-bottom{ padding-block: 1.3rem; font-size: .8rem; color: rgba(246,242,233,.4); }

/* ---------- Scroll reveal ---------- */
[data-reveal]{
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
[data-reveal].is-visible{
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 980px){
  .hero-inner{ grid-template-columns: 1fr; }
  .hero-diagram{ order:-1; max-width: 340px; margin-inline:auto; }
  .about-inner{ grid-template-columns: 1fr; }
  .about-media{ order:-1; }
  .cards{ grid-template-columns: 1fr 1fr; }
  .gallery-grid{ grid-template-columns: 1fr 1fr; }
  .contact-inner{ grid-template-columns: 1fr; }
  .footer-inner{ grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px){
  .main-nav{
    position: fixed; inset: 64px 0 auto auto;
    flex-direction: column; align-items: flex-start;
    background: var(--forest-deep);
    width: min(78vw, 320px);
    padding: 1.5rem;
    gap: 1.3rem;
    transform: translateX(110%);
    transition: transform .3s var(--ease);
    border-left: 1px solid rgba(246,242,233,.08);
    height: calc(100vh - 64px);
  }
  .main-nav.open{ transform: translateX(0); }
  .nav-toggle{ display:flex; }
  .nav-phone{ margin-top:.5rem; }
  .cards{ grid-template-columns: 1fr; }
  .gallery-grid{ grid-template-columns: 1fr; }
  .vetiver-facts{ grid-template-columns: 1fr; }
  .footer-inner{ grid-template-columns: 1fr; }
}