:root{
  --green:#173f2a;
  --deep:#08140e;
  --leaf:#2f7d42;
  --lime:#d5f2a5;
  --sand:#f6eddd;
  --ink:#16231b;
  --muted:#657468;
  --white:#ffffff;
  --shadow:0 18px 50px rgba(0,0,0,.18);
}

*{box-sizing:border-box}

html,body{
  margin:0;
  padding:0;
}

body{
  font-family:Arial,Helvetica,sans-serif;
  color:var(--ink);
  background:var(--sand);
  line-height:1.6;
}

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

.site-header{
  position:sticky;
  top:0;
  z-index:100;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:24px;
  padding:18px 6vw;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);
  box-shadow:0 1px 20px rgba(0,0,0,.08);
}

.brand{
  display:flex;
  gap:14px;
  align-items:center;
}

.brand-mark{
  width:58px;
  height:58px;
  border-radius:50%;
  display:grid;
  place-items:center;
  background:var(--green);
  color:var(--lime);
  font-size:22px;
  font-weight:900;
}

.brand strong{
  display:block;
  color:var(--green);
  font-size:22px;
  line-height:1.1;
}

.brand small{
  display:block;
  color:var(--muted);
  font-size:13px;
  margin-top:3px;
}

.nav{
  display:flex;
  gap:22px;
  align-items:center;
  flex-wrap:wrap;
}

.nav a{
  font-weight:700;
}

.button,
.nav-cta{
  display:inline-block;
  background:var(--leaf);
  color:#fff;
  padding:14px 22px;
  border-radius:999px;
  font-weight:800;
}

.button.secondary{
  background:rgba(255,255,255,.15);
  color:#fff;
  border:2px solid rgba(255,255,255,.65);
}

.hero{
  min-height:80vh;
  display:flex;
  align-items:center;
  padding:6rem 6vw;
  background:
    linear-gradient(
      90deg,
      rgba(8,20,14,.66) 0%,
      rgba(8,20,14,.56) 30%,
      rgba(8,20,14,.34) 55%,
      rgba(8,20,14,.10) 76%,
      rgba(8,20,14,0) 100%
    ),
    url('/assets/images/carlos-smallriver-costarica-guide.webp');
  background-size:cover;
  background-position:right center;
  background-repeat:no-repeat;
}

.hero-card{
  max-width:720px;
}

.eyebrow{
  color:var(--green);
  font-weight:800;
  text-transform:uppercase;
  letter-spacing:2px;
  margin-bottom:18px;
}

.hero .eyebrow{
  color:var(--lime);
  text-shadow:0 2px 8px rgba(0,0,0,.85);
}

h1{
  font-size:clamp(42px,7vw,86px);
  line-height:.95;
  margin:10px 0 20px;
}

h2{
  font-size:clamp(28px,4vw,48px);
  line-height:1.05;
  margin:0 0 18px;
}

.hero h1{
  color:#fff;
  font-size:clamp(3.2rem,6vw,5.8rem);
  line-height:.95;
  margin:0 0 24px;
  text-shadow:
    0 4px 14px rgba(0,0,0,.75),
    0 1px 3px rgba(0,0,0,.9);
}

.hero .lead{
  color:#fff;
  font-size:1.35rem;
  line-height:1.8;
  text-shadow:0 2px 8px rgba(0,0,0,.75);
}

.hero p{
  color:#fff;
  line-height:1.8;
  text-shadow:0 2px 8px rgba(0,0,0,.75);
}

.hero-actions{
  display:flex;
  gap:16px;
  flex-wrap:wrap;
  margin-top:34px;
}

.hero .button{
  box-shadow:0 12px 35px rgba(0,0,0,.35);
}

.section{
  padding:80px 6vw;
}

.section.intro{
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:40px;
  align-items:center;
}

.card{
  background:#fff;
  border-radius:28px;
  padding:34px;
  box-shadow:var(--shadow);
}

.photo-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:18px;
}

.photo-tile{
  min-height:250px;
  border-radius:28px;
  overflow:hidden;
  position:relative;
  background:#ddd;
  box-shadow:var(--shadow);
}

.photo-tile.tall{
  grid-row:span 2;
  min-height:520px;
}

.photo-tile img{
  width:100%;
  height:100%;
  object-fit:cover;
  position:absolute;
  inset:0;
}

.photo-tile span{
  position:absolute;
  left:16px;
  bottom:16px;
  background:rgba(0,0,0,.65);
  color:#fff;
  padding:8px 14px;
  border-radius:999px;
  font-weight:800;
}

.dark{
  background:var(--green);
  color:#fff;
}

.experience-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}

.experience{
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.16);
  border-radius:24px;
  padding:24px;
}

.experience h3{
  margin-top:0;
}

.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:40px;
  align-items:center;
}

.rounded-img{
  width:100%;
  border-radius:30px;
  box-shadow:var(--shadow);
}

.contact-box{
  max-width:800px;
  margin:auto;
  text-align:center;
}

.muted{
  color:var(--muted);
}

.site-footer{
  display:flex;
  justify-content:space-between;
  gap:20px;
  padding:38px 6vw;
  background:#10261b;
  color:#fff;
}

.site-footer p{
  margin:6px 0 0;
  color:#d4e5d5;
}

.footer-links{
  display:flex;
  gap:18px;
  flex-wrap:wrap;
  align-items:center;
}

@media(max-width:900px){
  .site-header,
  .site-footer{
    display:block;
  }

  .nav{
    margin-top:16px;
  }

  .section.intro,
  .split{
    grid-template-columns:1fr;
  }

  .photo-grid,
  .experience-grid{
    grid-template-columns:1fr;
  }

  .photo-tile.tall{
    min-height:320px;
  }

  .hero{
    min-height:70vh;
    padding:5rem 6vw;
    background-position:65% center;
  }

  .hero h1{
    font-size:clamp(2.6rem,10vw,4rem);
  }
}