* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}

body {
  background: #f5f7fb;
  color: #333;
}

/* HEADER */
header {
  background: #fff;
  text-align: center;
  padding: 15px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

header img {
  width: 140px;
  margin-bottom: 10px;
}

/* NAV */
nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 25px;
}

nav ul li {
  position: relative;
}

nav ul li a {
  text-decoration: none;
  color: #333;
  font-weight: bold;
}

nav ul li ul {
  display: none;
  position: absolute;
  background: #fff;
  top: 30px;
  left: 0;
  min-width: 200px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

nav ul li:hover ul {
  display: block;
}

nav ul li ul li {
  padding: 10px;
}

/* HERO */
.hero {
  height: 60vh;
  min-height: 320px;
  background:
    linear-gradient(rgba(13,90,200,0.65), rgba(13,90,200,0.65)),
    url("/images/hero.jpg") center/cover no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.hero h1 {
  color: #fff;
  font-size: 2.2rem;
  margin-bottom: 15px;
}

.btn {
  background: #fff;
  color: #0d5ac8;
  padding: 12px 25px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: bold;
}

/* SECTIONS */
.section {
  padding: 60px 20px;
  text-align: center;
}

.section h2 {
  color: #0d5ac8;
  margin-bottom: 30px;
}

/* SERVICES */
.services-grid {
  max-width: 1100px;
  margin: auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 25px;
}

.service-box {
  background: #fff;
  padding: 25px;
  border-radius: 12px;
  text-align: left;
  box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}

.service-box h4 {
  color: #0d5ac8;
  margin-bottom: 15px;
}

.service-box ul {
  list-style: none;
}

.service-box ul li::before {
  content: "✔ ";
  color: #0d5ac8;
  font-weight: bold;
}

/* ECO */
.service-box.eco {
  border-left: 5px solid #2e7d32;
  background: #f3fff5;
}

/* GALLERY */
#gallery {
  display: none;
}

#gallery:target {
  display: block;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 15px;
}

.gallery-grid img {
  width: 100%;
  border-radius: 10px;
}

/* CONTACT */
.contact-form {
  max-width: 400px;
  margin: auto;
}

.contact-form input,
.contact-form textarea,
.contact-form button {
  width: 100%;
  padding: 12px;
  margin-bottom: 10px;
}

/* FOOTER */
footer {
  background: #0d5ac8;
  color: #fff;
  text-align: center;
  padding: 15px;
}

/* MOBILE */
@media (max-width: 600px) {
  nav ul {
    flex-wrap: wrap;
  }
}