@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@600;700&family=Open+Sans:wght@300;400;600&display=swap');

:root {
  --nav-bg:#0C2340;
  --accent1:#009688;
  --accent2:#2E7D32;
  --muted:#f4f6f8;
  --card-shadow:rgba(12,35,64,0.08);
}

body {
  font-family:'Open Sans',sans-serif;
  margin:0;
  background:#f9f9f9;
  color:#222;
  line-height:1.6
}
h1,h2,h3 {
  font-family:'Montserrat',sans-serif;
  color:var(--nav-bg)
}
a {
  color:var(--accent1);
  text-decoration:none
}
img {
  max-width:100%;
  display:block
}

/* Navbar */
.navbar {
  display:flex;
  justify-content:space-between;
  align-items:center;
  background:var(--nav-bg);
  padding:12px 24px;
  position:sticky;
  top:0;
  z-index:1000
}
.navbar img {
  height:48px
}
.nav-links {
  display:flex;
  gap:18px
}
.nav-links a {
  color:#fff;
  font-weight:600;
  transition:0.2s;
  padding:8px
}
.nav-links a:hover {
  color:var(--accent1)
}
.hamburger {
  display:none;
  flex-direction:column;
  gap:4px;
  cursor:pointer
}
.hamburger div {
  width:26px;
  height:3px;
  background:#fff;
  border-radius:3px
}
@media(max-width:768px) {
  .nav-links {
    display:none;
    flex-direction:column;
    gap:10px;
    background:var(--nav-bg);
    padding:10px
  }
  .nav-links.active {
    display:flex
  }
  .hamburger {
    display:flex
  }
}

/* Hero Slideshow with Fade */
.hero {
  position: relative;
  min-height: 420px;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.hero-slide {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background-size: cover;
  background-position: center;
  opacity: 0;
  animation: fadeSlideshow 24s infinite;
}

.hero-slide:nth-child(1) {
  background-image: url('images/hero1.jpg');
  animation-delay: 0s;
}
.hero-slide:nth-child(2) {
  background-image: url('images/hero2.jpg');
  animation-delay: 6s;
}
.hero-slide:nth-child(3) {
  background-image: url('images/hero3.jpg');
  animation-delay: 12s;
}
.hero-slide:nth-child(4) {
  background-image: url('images/hero4.jpg');
  animation-delay: 18s;
}

@keyframes fadeSlideshow {
  0% { opacity: 0; }
  5% { opacity: 1; }
  25% { opacity: 1; }
  30% { opacity: 0; }
  100% { opacity: 0; }
}

/* Overlay */
.hero .overlay {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(12, 35, 64, 0.4);
  z-index: 1;
}

/* Logo Watermark */
.hero .logo-overlay {
  position: absolute;
  bottom: 20px; right: 20px;
  opacity: 0.15;
  width: 100px;
  z-index: 2;
}

/* Text Content */
.hero-content {
  position: relative;
  z-index: 3;
  padding: 20px;
}
.hero-content h1 {
  font-size: 2.5rem;
  margin-bottom: 10px;
}
.hero-content p {
  font-size: 1.1rem;
  margin-bottom: 20px;
}
.hero-content .btn {
  padding: 12px 24px;
  border-radius: 30px;
  background: linear-gradient(90deg, var(--accent1), var(--accent2));
  color: #fff;
  font-weight: 700;
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}
.hero-content .btn:hover {
  opacity: 0.9;
}

/* Sections */
.section {
  padding:60px 20px;
  max-width:1100px;
  margin:auto
}
.alt-bg {
  background:var(--muted)
}
.card-grid {
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:20px
}
.card {
  background:#fff;
  border-radius:10px;
  box-shadow:0 6px 16px var(--card-shadow);
  padding:20px;
  transition:0.3s
}
.card:hover {
  transform:translateY(-4px)
}
.card h3 {
  margin-top:0
}
.readmore {
  background:transparent;
  border:1px solid var(--accent1);
  color:var(--accent1);
  padding:8px 12px;
  border-radius:6px;
  cursor:pointer;
  font-weight:600;
  margin-top:10px
}
.readmore:hover {
  background:var(--accent1);
  color:#fff
}
.service-details {
  max-height:0;
  overflow:hidden;
  transition:max-height 0.4s ease
}
.service-details.open {
  margin-top:10px
}

/* Clients */
.clients-logos {
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:18px;
  text-align:center
}
.clients-logos .placeholder {
  background:#fff;
  padding:20px;
  border-radius:8px;
  box-shadow:0 4px 12px var(--card-shadow)
}
.note {
  text-align:center;
  margin-top:10px;
  font-size:0.9rem;
  color:#555
}

/* Contact */
input,textarea {
  width:100%;
  padding:12px;
  border-radius:8px;
  border:1px solid #ccc;
  margin-bottom:12px;
  font-size:1rem
}
button {
  background:linear-gradient(90deg,var(--accent1),var(--accent2));
  color:#fff;
  border:none;
  padding:12px 20px;
  border-radius:30px;
  cursor:pointer;
  font-size:1rem
}
button:hover {
  opacity:0.9
}

/* Footer */
footer {
  background:var(--nav-bg);
  color:#fff;
  text-align:center;
  padding:20px;
  margin-top:40px
}