/* ============================================================
   PDV INGENIERÍA — Hoja de estilos principal
   Paleta: #1E4B38 (verde oscuro) · #45B063 (verde logo)
           #95CF5F (verde lima) · #F6F8F5 (fondo claro)
   Tipografía: Oswald (títulos) / Source Sans 3 (cuerpo)
   ============================================================ */

:root{
  --verde-oscuro:#1E4B38;
  --verde-oscuro-2:#163627;
  --verde-logo:#45B063;
  --verde-lima:#95CF5F;
  --bg:#F6F8F5;
  --bg-alt:#EEF3ED;
  --texto:#1B2620;
  --texto-muted:#5C6D63;
  --borde:#DCE6DD;
  --blanco:#FFFFFF;

  --fuente-titulo:'Oswald', sans-serif;
  --fuente-cuerpo:'Source Sans 3','Segoe UI',sans-serif;

  --radio:10px;
  --sombra:0 6px 24px rgba(20,40,30,.08);
  --maxw:1180px;
}

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

html{scroll-behavior:smooth;}

body{
  font-family:var(--fuente-cuerpo);
  color:var(--texto);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

img{max-width:100%;display:block;}

a{color:inherit;text-decoration:none;}

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

h1,h2,h3,h4{
  font-family:var(--fuente-titulo);
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:.5px;
  line-height:1.15;
  color:var(--verde-oscuro);
}

h1{font-size:clamp(2.4rem,5vw,3.6rem);}
h2{font-size:clamp(1.7rem,3.4vw,2.4rem);}
h3{font-size:1.2rem;}

p{color:var(--texto-muted);}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--fuente-titulo);
  font-size:.8rem;
  font-weight:600;
  letter-spacing:2px;
  text-transform:uppercase;
  color:var(--verde-logo);
  margin-bottom:10px;
}

/* ============== HEADER / NAV ============== */
.site-header{
  position:sticky;top:0;z-index:100;
  background:var(--blanco);
  border-bottom:1px solid var(--borde);
}
.nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:14px 24px;
  max-width:var(--maxw);
  margin:0 auto;
}
.nav__logo{display:flex;align-items:center;gap:10px;}
.nav__logo img{height:46px;}
.nav__logo span{
  font-family:var(--fuente-titulo);
  font-size:1.1rem;
  font-weight:700;
  color:var(--texto);
  letter-spacing:1px;
}
.nav__links{
  display:flex;
  gap:30px;
  list-style:none;
  align-items:center;
}
.nav__links a{
  font-family:var(--fuente-titulo);
  font-size:.92rem;
  font-weight:500;
  letter-spacing:1px;
  text-transform:uppercase;
  color:var(--texto);
  position:relative;
  padding:4px 0;
  transition:color .2s;
}
.nav__links a:hover,
.nav__links a.activo{color:var(--verde-logo);}
.nav__links a.activo::after{
  content:'';
  position:absolute;left:0;bottom:-4px;
  width:100%;height:3px;
  background:var(--verde-lima);
}
.nav__cta{
  background:var(--verde-oscuro);
  color:var(--blanco) !important;
  padding:10px 22px;
  border-radius:6px;
  font-family:var(--fuente-titulo);
  font-weight:600;
  letter-spacing:1px;
  text-transform:uppercase;
  font-size:.85rem;
  transition:background .2s;
}
.nav__cta:hover{background:var(--verde-logo);}

.nav__toggle{
  display:none;
  flex-direction:column;
  gap:5px;
  background:none;border:none;cursor:pointer;
  padding:6px;
}
.nav__toggle span{width:24px;height:3px;background:var(--verde-oscuro);border-radius:2px;}

/* ============== HERO ============== */
.hero{
  position:relative;
  min-height:78vh;
  display:flex;
  align-items:center;
  background:linear-gradient(120deg,rgba(22,54,39,.92) 0%,rgba(22,54,39,.75) 45%,rgba(22,54,39,.35) 100%),
              url('../assets/hero-towers.jpg') center/cover no-repeat;
  color:var(--blanco);
  clip-path:polygon(0 0,100% 0,100% 92%,0 100%);
}
.hero__content{max-width:640px;padding:120px 0 90px;}
.hero__content .eyebrow{color:var(--verde-lima);}
.hero h1{color:var(--blanco);margin-bottom:18px;}
.hero h1 span{color:var(--verde-lima);}
.hero p{color:#E7EFE9;font-size:1.05rem;max-width:520px;margin-bottom:30px;}

.btns{display:flex;gap:16px;flex-wrap:wrap;}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 28px;
  border-radius:6px;
  font-family:var(--fuente-titulo);
  font-weight:600;
  letter-spacing:1px;
  text-transform:uppercase;
  font-size:.88rem;
  border:2px solid transparent;
  transition:all .2s;
}
.btn--primario{background:var(--verde-lima);color:var(--verde-oscuro-2);}
.btn--primario:hover{background:var(--blanco);}
.btn--outline{border-color:var(--blanco);color:var(--blanco);}
.btn--outline:hover{background:var(--blanco);color:var(--verde-oscuro);}
.btn--small{padding:9px 20px;font-size:.78rem;}

/* ============== HERO secundario (paginas internas) ============== */
.page-hero{
  background:var(--verde-oscuro-2);
  color:var(--blanco);
  padding:70px 0 60px;
  clip-path:polygon(0 0,100% 0,100% 88%,0 100%);
  position:relative;
  overflow:hidden;
}
.page-hero::after{
  content:'';
  position:absolute;right:-80px;top:-80px;
  width:340px;height:340px;
  background:var(--verde-logo);
  opacity:.18;
  border-radius:50%;
}
.page-hero h1{color:var(--blanco);position:relative;z-index:1;}
.page-hero p{color:#CFE3D7;max-width:620px;margin-top:14px;position:relative;z-index:1;}
.page-hero .eyebrow{color:var(--verde-lima);position:relative;z-index:1;}

/* ============== SECCIONES ============== */
section{padding:80px 0;}
.section--alt{background:var(--bg-alt);}
.section__head{max-width:760px;margin-bottom:46px;}
.section__head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section__head p{margin-top:12px;font-size:1.02rem;}

/* ============== STATS BAR ============== */
.stats{
  background:var(--verde-oscuro);
  color:var(--blanco);
  padding:34px 0;
  margin-top:-1px;
}
.stats__grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
  text-align:center;
}
.stats__grid strong{
  display:block;
  font-family:var(--fuente-titulo);
  font-size:clamp(1.8rem,3vw,2.6rem);
  color:var(--verde-lima);
}
.stats__grid span{font-size:.85rem;letter-spacing:.5px;color:#D8E7DD;}

/* ============== GRID DE TARJETAS ============== */
.grid{display:grid;gap:26px;}
.grid--3{grid-template-columns:repeat(3,1fr);}
.grid--2{grid-template-columns:repeat(2,1fr);}

.card{
  background:var(--blanco);
  border:1px solid var(--borde);
  border-radius:var(--radio);
  padding:30px 26px;
  box-shadow:var(--sombra);
  transition:transform .2s,box-shadow .2s;
}
.card:hover{transform:translateY(-4px);box-shadow:0 14px 32px rgba(20,40,30,.12);}
.card__icon{
  width:54px;height:54px;
  display:flex;align-items:center;justify-content:center;
  background:var(--verde-logo);
  border-radius:50%;
  color:var(--blanco);
  margin-bottom:18px;
  flex-shrink:0;
}
.card h3{margin-bottom:8px;}
.card p{font-size:.95rem;}

/* ============== ESPECIALIDADES (numeradas) ============== */
.especialidades{display:flex;flex-direction:column;gap:14px;}
.especialidad{
  display:flex;
  align-items:center;
  gap:22px;
  background:var(--blanco);
  border:1px solid var(--borde);
  border-radius:var(--radio);
  padding:20px 26px;
  position:relative;
  overflow:hidden;
}
.especialidad__num{
  font-family:var(--fuente-titulo);
  font-size:2rem;
  font-weight:700;
  color:var(--verde-lima);
  min-width:46px;
  text-align:center;
  flex-shrink:0;
}
.especialidad__txt h3{margin-bottom:4px;font-size:1.05rem;}
.especialidad__txt p{font-size:.92rem;margin:0;}
.especialidad::before{
  content:'';
  position:absolute;left:0;top:0;bottom:0;
  width:5px;background:var(--verde-logo);
}

/* ============== LISTA SERVICIOS DE INGENIERIA ============== */
.servicio-item{
  border-bottom:1px solid var(--borde);
  padding:22px 0;
}
.servicio-item:last-child{border-bottom:none;}
.servicio-item h3{margin-bottom:6px;color:var(--verde-oscuro);}
.servicio-item p{font-size:.95rem;}

/* ============== VALORES ============== */
.valor{
  border-left:4px solid var(--verde-lima);
  padding:6px 0 6px 18px;
  margin-bottom:18px;
}
.valor h3{font-size:1rem;margin-bottom:4px;}
.valor p{font-size:.92rem;margin:0;}

/* ============== MISION / VISION ============== */
.mv-card{
  background:var(--verde-oscuro);
  color:var(--blanco);
  border-radius:var(--radio);
  padding:32px;
}
.mv-card h3{color:var(--verde-lima);margin-bottom:10px;}
.mv-card p{color:#DCEBE2;font-size:.95rem;margin:0;}

/* ============== PROYECTOS ============== */
.proyecto{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:34px;
  background:var(--blanco);
  border:1px solid var(--borde);
  border-radius:var(--radio);
  overflow:hidden;
  margin-bottom:34px;
  box-shadow:var(--sombra);
}
.proyecto__media{
  display:grid;
  grid-template-columns:1fr 1fr;
  grid-template-rows:1fr 1fr;
  gap:2px;
  min-height:320px;
}
.proyecto__media img{width:100%;height:100%;object-fit:cover;}
.proyecto__media img:first-child{grid-row:1/3;}
.proyecto__placeholder{
  width:100%;
  min-height:280px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:12px;
  background:var(--bg-alt);
  border:2px dashed var(--borde);
  color:var(--texto-muted);
  font-family:var(--fuente-titulo);
  font-size:.8rem;
  letter-spacing:1px;
  text-transform:uppercase;
  text-align:center;
  padding:20px;
}
.proyecto__body{padding:30px 30px 30px 0;display:flex;flex-direction:column;}
.proyecto__tag{
  display:inline-block;
  background:var(--verde-logo);
  color:var(--blanco);
  font-family:var(--fuente-titulo);
  font-size:.72rem;
  letter-spacing:1.5px;
  text-transform:uppercase;
  padding:5px 12px;
  border-radius:4px;
  margin-bottom:12px;
  width:fit-content;
}
.proyecto__body h3{font-size:1.25rem;margin-bottom:10px;color:var(--verde-oscuro);}
.proyecto__body p{font-size:.92rem;margin-bottom:14px;}
.proyecto__datos{
  list-style:none;
  display:flex;flex-direction:column;gap:6px;
  font-size:.88rem;
  font-weight:600;
  color:var(--verde-oscuro);
  margin-bottom:14px;
}
.proyecto__datos li::before{content:"▸ ";color:var(--verde-logo);}
.proyecto__meta{
  margin-top:auto;
  display:flex;gap:24px;flex-wrap:wrap;
  justify-content:space-around;
  text-align:center;
  font-size:.85rem;
  color:var(--texto-muted);
  border-top:1px solid var(--borde);
  padding-top:14px;
}
.proyecto__meta > div{
  flex:1 1 0;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:6px;
  min-width:140px;
}
.proyecto__meta strong{color:var(--texto);display:block;font-size:.78rem;text-transform:uppercase;letter-spacing:1px;}

/* ============== LOGOS / CERTIFICACIONES ============== */
.logos-bar{
  display:flex;
  flex-wrap:wrap;
  gap:40px;
  align-items:center;
  justify-content:center;
  padding:30px 0;
}
.logos-bar img{height:46px;width:auto;filter:grayscale(15%);opacity:.85;}
.cert-badge{
  text-align:center;
  font-family:var(--fuente-titulo);
  font-size:.85rem;
  letter-spacing:1px;
  color:var(--verde-oscuro);
  border:1px solid var(--borde);
  border-radius:var(--radio);
  padding:18px 26px;
  background:var(--blanco);
}

/* ============== CTA FINAL ============== */
.cta{
  background:var(--verde-oscuro);
  color:var(--blanco);
  text-align:center;
  padding:70px 0;
  position:relative;
  clip-path:polygon(0 6%,100% 0,100% 100%,0 100%);
}
.cta h2{color:var(--blanco);margin-bottom:14px;}
.cta p{color:#D8E7DD;max-width:560px;margin:0 auto 28px;}
.cta .btns{justify-content:center;}

/* ============== CONTACTO ============== */
.contacto-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:50px;
}
.contacto-item{
  display:flex;gap:16px;align-items:flex-start;
  margin-bottom:24px;
}
.contacto-item__icon{
  width:46px;height:46px;flex-shrink:0;
  background:var(--verde-logo);
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  color:var(--blanco);
}
.contacto-item h3{font-size:1rem;margin-bottom:4px;}
.contacto-item p,.contacto-item a{font-size:.95rem;color:var(--texto-muted);}

.form{
  display:flex;flex-direction:column;gap:14px;
  background:var(--blanco);
  border:1px solid var(--borde);
  border-radius:var(--radio);
  padding:30px;
  box-shadow:var(--sombra);
}
.form label{font-size:.85rem;font-weight:600;color:var(--verde-oscuro);text-transform:uppercase;letter-spacing:.5px;}
.form input,.form textarea{
  width:100%;
  padding:12px 14px;
  border:1px solid var(--borde);
  border-radius:6px;
  font-family:var(--fuente-cuerpo);
  font-size:.95rem;
  background:var(--bg);
}
.form input:focus,.form textarea:focus{outline:2px solid var(--verde-logo);}
.form button{
  background:var(--verde-oscuro);
  color:var(--blanco);
  border:none;
  padding:14px;
  border-radius:6px;
  font-family:var(--fuente-titulo);
  text-transform:uppercase;
  letter-spacing:1px;
  font-weight:600;
  font-size:.9rem;
  cursor:pointer;
  transition:background .2s;
}
.form button:hover{background:var(--verde-logo);}

.map-wrap{
  border-radius:var(--radio);
  overflow:hidden;
  border:1px solid var(--borde);
  margin-top:24px;
}
.map-wrap iframe{width:100%;height:280px;border:0;display:block;}

/* ============== FOOTER ============== */
.site-footer{
  background:var(--verde-oscuro-2);
  color:#CFE3D7;
  padding:54px 0 22px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr;
  gap:40px;
  margin-bottom:36px;
}
.footer-logo{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-logo img{height:40px;}
.footer-logo span{font-family:var(--fuente-titulo);font-size:1.1rem;color:var(--blanco);letter-spacing:1px;}
.site-footer h4{
  color:var(--verde-lima);
  font-size:.85rem;
  letter-spacing:2px;
  margin-bottom:14px;
}
.site-footer ul{list-style:none;display:flex;flex-direction:column;gap:9px;}
.site-footer a{color:#CFE3D7;font-size:.92rem;transition:color .2s;}
.site-footer a:hover{color:var(--verde-lima);}
.site-footer p{color:#A9C4B6;font-size:.92rem;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding-top:20px;
  text-align:center;
  font-size:.82rem;
  color:#9BB8AA;
}

/* ============== UTILIDADES ============== */
.divider-band{
  height:46px;
  background:var(--verde-lima);
  clip-path:polygon(0 0,100% 40%,100% 100%,0 60%);
}

/* ============== RESPONSIVE ============== */
@media (max-width:920px){
  .grid--3{grid-template-columns:repeat(2,1fr);}
  .stats__grid{grid-template-columns:repeat(2,1fr);}
  .proyecto{grid-template-columns:1fr;}
  .proyecto__body{padding:0 26px 26px;}
  .contacto-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}

@media (max-width:680px){
  .nav__links{
    position:absolute;top:100%;left:0;right:0;
    background:var(--blanco);
    flex-direction:column;
    align-items:flex-start;
    padding:18px 24px;
    gap:16px;
    border-bottom:1px solid var(--borde);
    display:none;
  }
  .nav__links.abierto{display:flex;}
  .nav__toggle{display:flex;}
  .grid--3,.grid--2{grid-template-columns:1fr;}
  .hero__content{padding:90px 0 70px;}
  .footer-grid{grid-template-columns:1fr;}
  .proyecto__media{grid-template-columns:1fr;grid-template-rows:repeat(2,160px);}
  .proyecto__media img:first-child{grid-row:auto;}
}