/* Lu'um Bioconversión — hoja de estilos compartida */
:root {
  --verde: #1F6F3A;
  --marron: #6B4423;
  --blanco: #FFFFFF;
  --texto: #232323;
  --gris-claro: #F5F3EF;
  --max-width: 1160px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Roboto', 'Open Sans', system-ui, sans-serif;
  color: var(--texto);
  background: var(--blanco);
  line-height: 1.6;
}

h1, h2, h3, h4 {
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  line-height: 1.25;
  color: var(--verde);
}

h1 { font-size: clamp(1.9rem, 4vw, 2.8rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); margin-bottom: 1rem; }
h3 { font-size: 1.2rem; font-weight: 600; }

p { margin-bottom: 1rem; }

a { color: var(--verde); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; display: block; border-radius: 12px; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Header ---------- */
.site-header {
  background: var(--blanco);
  border-bottom: 1px solid #eee;
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  padding-bottom: 14px;
}
.logo-wordmark {
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--verde);
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-wordmark .brote {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: linear-gradient(180deg, var(--verde) 50%, var(--marron) 50%);
  flex-shrink: 0;
}
.logo-wordmark small {
  display: block;
  font-family: 'Roboto', sans-serif;
  font-weight: 400;
  font-size: 0.65rem;
  color: var(--marron);
  letter-spacing: 0.03em;
}
nav.main-nav ul {
  list-style: none;
  display: flex;
  gap: 26px;
  flex-wrap: wrap;
}
nav.main-nav a {
  color: var(--texto);
  font-weight: 500;
  font-size: 0.95rem;
}
nav.main-nav a:hover, nav.main-nav a.active { color: var(--verde); text-decoration: none; border-bottom: 2px solid var(--verde); }
.nav-toggle { display: none; background: none; border: none; font-size: 1.6rem; cursor: pointer; color: var(--verde); }

@media (max-width: 820px) {
  nav.main-nav {
    display: none;
    width: 100%;
    order: 3;
  }
  nav.main-nav.open { display: block; }
  nav.main-nav ul { flex-direction: column; gap: 0; padding: 10px 0; }
  nav.main-nav a { display: block; padding: 12px 0; border-bottom: 1px solid #eee; }
  .site-header .container { flex-wrap: wrap; }
  .nav-toggle { display: block; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 13px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--verde); color: var(--blanco); }
.btn-primary:hover { background: #185c2f; color: var(--blanco); }
.btn-secondary { background: var(--marron); color: var(--blanco); }
.btn-secondary:hover { background: #543619; color: var(--blanco); }
.btn-outline { background: transparent; border-color: var(--blanco); color: var(--blanco); }
.btn-outline:hover { background: rgba(255,255,255,0.15); color: var(--blanco); }
.btn-row { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 1.5rem; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  color: var(--blanco);
  min-height: 78vh;
  display: flex;
  align-items: center;
  background-size: cover;
  background-position: center;
  isolation: isolate;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(19,42,26,0.88) 0%, rgba(19,42,26,0.55) 55%, rgba(19,42,26,0.35) 100%);
  z-index: -1;
}
.hero .container { max-width: 720px; }
.hero h1 { color: var(--blanco); margin-bottom: 1rem; }
.hero p.subtitulo { font-size: 1.1rem; color: rgba(255,255,255,0.92); max-width: 560px; }
.page-hero {
  color: var(--blanco);
  background: var(--verde);
  padding: 74px 0 54px;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  /* Isotipo motif: large outlined circle bleeding off the top-right corner */
  content: "";
  position: absolute;
  top: -120px; right: -120px;
  width: 320px; height: 320px;
  border-radius: 50%;
  border: 34px solid var(--marron);
  opacity: 0.9;
}
.page-hero::after {
  /* A second, smaller solid circle low on the left — echoes the isotipo pairing */
  content: "";
  position: absolute;
  bottom: -90px; left: 6%;
  width: 160px; height: 160px;
  border-radius: 50%;
  background: #185c2f;
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { color: var(--blanco); }
.page-hero p { color: rgba(255,255,255,0.9); max-width: 620px; }

/* ---------- Sections ---------- */
section { padding: 64px 0; }
section.alt { background: var(--gris-claro); }
.section-header { max-width: 680px; margin-bottom: 2.5rem; }

/* ---------- Photo placeholder tag ---------- */
.foto-wrap { position: relative; }
.foto-tag {
  position: absolute; bottom: 10px; left: 10px;
  background: rgba(0,0,0,0.6);
  color: #fff;
  font-size: 0.7rem;
  padding: 4px 10px;
  border-radius: 999px;
  font-family: monospace;
}

/* ---------- Grid helpers ---------- */
.grid { display: grid; gap: 28px; }
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 820px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}
.align-center { display: flex; align-items: center; }

/* ---------- Cards ---------- */
.card {
  background: var(--blanco);
  border: 1px solid #eee;
  border-radius: 16px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.card .card-body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
.card img { border-radius: 0; aspect-ratio: 4/3; object-fit: cover; }
.card h3 { margin-bottom: 6px; }
.card .card-body p { flex: 1; font-size: 0.95rem; color: #555; }

/* ---------- Steps (proceso) ---------- */
.step {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  padding: 50px 0;
  border-bottom: 1px solid #eee;
}
.step:nth-child(even) .step-media { order: 2; }
.step-num {
  display: inline-flex;
  align-items: center; justify-content: center;
  width: 42px; height: 42px;
  border-radius: 50%;
  background: var(--verde);
  color: #fff;
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  margin-bottom: 12px;
}
@media (max-width: 820px) {
  .step { grid-template-columns: 1fr; }
  .step:nth-child(even) .step-media { order: 0; }
}

/* ---------- CTA banda ---------- */
.cta-band {
  background: var(--marron);
  color: var(--blanco);
  padding: 46px 0;
  text-align: center;
}
.cta-band h2 { color: var(--blanco); }
.cta-band .btn-primary { background: var(--verde); }

/* ---------- Tabla productos ---------- */
table.precios { width: 100%; border-collapse: collapse; margin: 1.5rem 0; }
table.precios th, table.precios td { text-align: left; padding: 12px 14px; border-bottom: 1px solid #eee; font-size: 0.95rem; }
table.precios th { color: var(--verde); font-family: 'Montserrat', sans-serif; }
.precio-nota { font-size: 0.8rem; color: #888; margin-top: -0.5rem; }

/* ---------- Formulario ---------- */
form.contacto { display: flex; flex-direction: column; gap: 16px; max-width: 560px; }
form.contacto label { font-weight: 600; font-size: 0.9rem; margin-bottom: 4px; display: block; }
form.contacto input, form.contacto select, form.contacto textarea {
  width: 100%; padding: 11px 14px; border: 1px solid #ccc; border-radius: 8px;
  font-family: inherit; font-size: 0.95rem;
}
form.contacto textarea { min-height: 120px; resize: vertical; }
form.contacto input:focus, form.contacto select:focus, form.contacto textarea:focus {
  outline: 2px solid var(--verde); border-color: var(--verde);
}

/* ---------- Footer ---------- */
footer.site-footer {
  background: var(--marron);
  color: rgba(255,255,255,0.9);
  padding: 50px 0 24px;
  margin-top: 40px;
}
footer.site-footer .grid { grid-template-columns: 2fr 1fr 1fr; margin-bottom: 30px; }
footer.site-footer .logo-wordmark { color: var(--blanco); }
footer.site-footer .logo-wordmark small { color: rgba(255,255,255,0.7); }
footer.site-footer h4 { color: var(--blanco); font-size: 0.95rem; margin-bottom: 12px; }
footer.site-footer ul { list-style: none; }
footer.site-footer a { color: rgba(255,255,255,0.85); }
footer.site-footer a:hover { color: var(--blanco); }
footer.site-footer .legal {
  border-top: 1px solid rgba(255,255,255,0.2);
  padding-top: 18px;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.65);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
}
@media (max-width: 820px) {
  footer.site-footer .grid { grid-template-columns: 1fr; gap: 24px; }
}

/* ---------- Badge / pill ---------- */
.badge {
  display: inline-block;
  background: rgba(31,111,58,0.1);
  color: var(--verde);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 12px;
}

/* ---------- Selector de motivo (contacto) ---------- */
.motivo-selector { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 26px; }
.motivo-opcion {
  flex: 1; min-width: 200px;
  border: 2px solid #ddd; border-radius: 12px; padding: 16px;
  cursor: pointer; text-align: center; font-weight: 600; font-size: 0.9rem;
  transition: border-color .15s;
}
.motivo-opcion:hover, .motivo-opcion.selected { border-color: var(--verde); color: var(--verde); }
.motivo-opcion input { display: none; }