/* ==========================================================================
   Belaich Soluciones Civiles & Mantenimiento — style.css
   Paleta: blanco + grises, amarillo solo como acento puntual.
   ========================================================================== */

:root{
  --white:        #FFFFFF;
  --gray-100:      #F4F5F6;
  --gray-200:      #E4E6E8;
  --gray-400:      #B9BCC2;
  --gray-600:      #6B6E76;
  --gray-800:      #3A3D44;
  --gray-900:      #24262B;
  --gray-950:      #1B1D21;
  --yellow:        #F2B705;
  --yellow-dark:   #D9A400;

  --font: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;

  --container: 1180px;
  --radius: 10px;
  --shadow-sm: 0 2px 10px rgba(20,20,25,.06);
  --shadow-md: 0 12px 32px rgba(20,20,25,.10);
  --transition: .2s ease;
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  font-family: var(--font);
  color: var(--gray-900);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }
ul{ list-style: none; margin: 0; padding: 0; }
h1,h2,h3{ margin: 0 0 .5em; font-weight: 800; line-height: 1.2; letter-spacing: -.01em; }
p{ margin: 0 0 1em; color: var(--gray-600); }

.container{
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.icon{ width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.icon--lg{ width: 34px; height: 34px; }
.icon--accent{ color: var(--yellow-dark); flex-shrink: 0; }

/* ---------- Buttons ---------- */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: .95rem;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.btn--primary{ background: var(--yellow); color: var(--gray-950); }
.btn--primary:hover{ background: var(--yellow-dark); }
.btn--ghost-light{ border-color: rgba(255,255,255,.5); color: var(--white); }
.btn--ghost-light:hover{ border-color: var(--white); background: rgba(255,255,255,.08); }
.btn--whatsapp{ background: var(--gray-900); color: var(--white); }
.btn--whatsapp:hover{ background: var(--yellow); color: var(--gray-950); }
.btn--whatsapp .icon{ width: 18px; height: 18px; }
.btn--full{ width: 100%; }

/* ---------- Eyebrow / section titles ---------- */
.eyebrow{
  text-transform: uppercase;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--yellow-dark);
  margin: 0 0 12px;
}
.eyebrow--light{ color: var(--yellow); }
.eyebrow--center{ text-align: center; }

.section{ padding: 96px 0; }
.section--alt{ background: var(--gray-100); }
.section--dark{ background: var(--gray-950); color: var(--white); }
.section__title{ font-size: clamp(1.7rem, 3vw, 2.3rem); color: var(--gray-950); }
.section__title--center{ text-align: center; max-width: 720px; margin-left: auto; margin-right: auto; }
.section__title--light{ color: var(--white); }
.section__text--light{ color: var(--gray-400); }
.section__text{ font-size: 1.02rem; }

/* ---------- Header ---------- */
.header{
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  transition: var(--transition);
}
.header.is-scrolled{ box-shadow: var(--shadow-sm); }
.header__inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 84px;
  transition: height var(--transition);
}
.header.is-scrolled .header__inner{ height: 64px; }
.header__logo img{ height: 40px; transition: height var(--transition); }
.header.is-scrolled .header__logo img{ height: 32px; }

.nav__list{ display: flex; gap: 30px; }
.nav__link{
  font-weight: 600;
  font-size: .93rem;
  color: var(--gray-800);
  position: relative;
  padding: 6px 0;
}
.nav__link::after{
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--yellow);
  transition: width var(--transition);
}
.nav__link:hover::after, .nav__link.is-active::after{ width: 100%; }
.nav__link:hover{ color: var(--gray-950); }

.header__actions{ display: flex; align-items: center; gap: 14px; }
.header__burger{
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px; height: 42px;
  border-radius: 50%;
  border: 1.5px solid var(--gray-200);
  background: var(--white);
  color: var(--gray-900);
  cursor: pointer;
}

/* ---------- Hero ---------- */
.hero{
  position: relative;
  background: linear-gradient(160deg, var(--gray-950) 0%, var(--gray-900) 55%, var(--gray-800) 100%);
  color: var(--white);
  overflow: hidden;
  padding: 130px 0 90px;
}
.hero__pattern{
  position: absolute;
  inset: 0;
  opacity: .5;
  background-image:
    repeating-linear-gradient(0deg, rgba(255,255,255,.05) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(90deg, rgba(255,255,255,.05) 0 1px, transparent 1px 64px);
  mask-image: radial-gradient(ellipse 80% 60% at 70% 30%, black 40%, transparent 85%);
}
.hero__pattern::after{
  content: "";
  position: absolute;
  top: -10%; right: -6%;
  width: 620px; height: 620px;
  border: 1px solid rgba(242,183,5,.25);
  transform: rotate(15deg);
}
.hero__inner{ position: relative; z-index: 1; max-width: 760px; }
.hero__title{ font-size: clamp(2.1rem, 4.4vw, 3.4rem); color: var(--white); }
.hero__subtitle{ font-size: 1.08rem; color: var(--gray-400); max-width: 640px; }
.hero__actions{ display: flex; flex-wrap: wrap; gap: 16px; margin: 32px 0 56px; }

.hero__stats{ display: flex; flex-wrap: wrap; gap: 40px; padding-top: 32px; border-top: 1px solid rgba(255,255,255,.15); }
.hero__stats li{ display: flex; flex-direction: column; gap: 4px; }
.hero__stats strong{ font-size: 1.8rem; font-weight: 800; color: var(--yellow); }
.hero__stats span{ font-size: .85rem; color: var(--gray-400); max-width: 160px; }

.hero__scroll{
  position: absolute;
  bottom: 28px; left: 50%;
  transform: translateX(-50%);
  color: var(--gray-400);
  animation: bob 2.2s ease-in-out infinite;
}
@keyframes bob{ 0%,100%{ transform: translate(-50%,0);} 50%{ transform: translate(-50%,8px);} }

/* ---------- Quiénes somos ---------- */
.section__grid{
  display: grid;
  grid-template-columns: 1.3fr .9fr;
  gap: 64px;
  align-items: center;
}
.highlight-card{
  background: var(--gray-950);
  color: var(--white);
  border-radius: var(--radius);
  padding: 40px;
  position: relative;
}
.highlight-card::before{
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 4px;
  background: var(--yellow);
  border-radius: var(--radius) var(--radius) 0 0;
}
.highlight-card h3{ color: var(--white); margin-top: 18px; }
.highlight-card p{ color: var(--gray-400); margin: 0; }
.highlight-card .icon--lg{ color: var(--yellow); }

/* ---------- Cards (servicios) ---------- */
.cards{ display: grid; gap: 28px; margin-top: 56px; }
.cards--3{ grid-template-columns: repeat(3, 1fr); }
.cards--4{ grid-template-columns: repeat(4, 1fr); }

.card{
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 34px 30px;
  transition: var(--transition);
}
.card:hover{ box-shadow: var(--shadow-md); border-color: transparent; transform: translateY(-4px); }
.card__icon{
  width: 58px; height: 58px;
  border-radius: 50%;
  background: var(--gray-100);
  display: flex; align-items: center; justify-content: center;
  color: var(--gray-900);
  margin-bottom: 20px;
}
.card:hover .card__icon{ background: var(--yellow); color: var(--gray-950); }
.card__title{ font-size: 1.2rem; }
.card__list li{ position: relative; padding-left: 20px; color: var(--gray-600); font-size: .94rem; margin-bottom: 8px; }
.card__list li::before{
  content: "";
  position: absolute; left: 0; top: 10px;
  width: 6px; height: 6px;
  background: var(--yellow-dark);
  border-radius: 50%;
}

/* ---------- Pillars (valores) ---------- */
.pillar{
  text-align: center;
  padding: 30px 20px;
}
.pillar h3{ font-size: 1.05rem; margin-top: 16px; }
.pillar p{ font-size: .92rem; }

/* ---------- Logo grid (clientes) ---------- */
.logo-grid{
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin-top: 56px;
}
.logo-grid__item{
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  height: 110px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  transition: var(--transition);
}
.logo-grid__item:hover{ box-shadow: var(--shadow-sm); border-color: var(--yellow); }
.logo-grid__item img{ max-height: 100%; max-width: 100%; object-fit: contain; }

/* ---------- Contacto ---------- */
.contact__grid{ display: grid; grid-template-columns: .9fr 1.1fr; gap: 64px; align-items: start; }
.contact__list{ margin: 28px 0 34px; display: flex; flex-direction: column; gap: 18px; }
.contact__list li{ display: flex; align-items: center; gap: 14px; color: var(--gray-400); font-size: .98rem; }
.contact__list a:hover{ color: var(--yellow); }

.contact__form{
  background: var(--white);
  border-radius: var(--radius);
  padding: 36px;
  display: grid;
  gap: 18px;
}
.form__field{ display: flex; flex-direction: column; gap: 8px; font-size: .88rem; font-weight: 600; color: var(--gray-800); }
.form__field input, .form__field textarea{
  font-family: var(--font);
  font-size: .96rem;
  padding: 12px 14px;
  border-radius: 8px;
  border: 1.5px solid var(--gray-200);
  background: var(--gray-100);
  color: var(--gray-900);
  resize: vertical;
  transition: var(--transition);
}
.form__field input:focus, .form__field textarea:focus{
  outline: none;
  border-color: var(--yellow-dark);
  background: var(--white);
}
.form__note{ font-size: .82rem; color: var(--gray-600); text-align: center; margin: 4px 0 0; }
.form__note a{ color: var(--yellow-dark); font-weight: 600; }

/* ---------- Footer ---------- */
.footer{ background: var(--gray-950); color: var(--gray-400); }
.footer__inner{
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  justify-content: space-between;
  align-items: flex-start;
  padding: 56px 0 40px;
}
.footer__logo{
  height: 34px;
  margin-bottom: 14px;
  background: var(--white);
  padding: 10px 16px;
  border-radius: 8px;
}
.footer__brand p{ color: var(--gray-400); font-size: .9rem; margin: 0; }
.footer__contact{ display: flex; flex-direction: column; gap: 8px; font-size: .92rem; }
.footer__contact a:hover{ color: var(--yellow); }
.footer__social{ display: flex; gap: 16px; }
.footer__social-link{
  font-size: .85rem;
  font-weight: 600;
  padding: 8px 16px;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 999px;
}
.footer__social-link:hover{ border-color: var(--yellow); color: var(--yellow); }
.footer__bottom{ border-top: 1px solid rgba(255,255,255,.1); padding: 18px 0; }
.footer__bottom p{ margin: 0; font-size: .82rem; color: var(--gray-600); text-align: center; }

/* ---------- WhatsApp float button ---------- */
.whatsapp-float{
  position: fixed;
  right: 24px; bottom: 24px;
  width: 58px; height: 58px;
  border-radius: 50%;
  background: #25D366;
  color: var(--white);
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-md);
  z-index: 90;
  transition: var(--transition);
}
.whatsapp-float:hover{ transform: scale(1.08); }
.whatsapp-float .icon{ width: 30px; height: 30px; }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 960px){
  .cards--3{ grid-template-columns: repeat(2, 1fr); }
  .cards--4{ grid-template-columns: repeat(2, 1fr); }
  .logo-grid{ grid-template-columns: repeat(3, 1fr); }
  .section__grid{ grid-template-columns: 1fr; gap: 40px; }
  .contact__grid{ grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 760px){
  .section{ padding: 64px 0; }
  .header__burger{ display: flex; }
  .nav{
    position: fixed;
    top: 84px;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 99;
    background: var(--white);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    padding: 24px;
    border-top: 1px solid var(--gray-200);
    overflow-y: auto;
  }
  .nav.is-open{ opacity: 1; visibility: visible; transform: translateY(0); }
  .nav__list{ flex-direction: column; gap: 4px; }
  .nav__link{ display: block; padding: 14px 6px; font-size: 1.05rem; border-bottom: 1px solid var(--gray-100); }
  .header__actions .btn--whatsapp span{ display: none; }
  .header__actions .btn--whatsapp{ padding: 12px; }
  .cards--3, .cards--4{ grid-template-columns: 1fr; }
  .logo-grid{ grid-template-columns: repeat(2, 1fr); }
  .hero{ padding: 110px 0 70px; }
  .hero__stats{ gap: 28px; }
}