* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background-color: black;
  color: white;
  font-family: Arial, Helvetica, sans-serif;
  scroll-behavior: smooth;
}

section {
  background-color: black !important;
  color: white;
  padding: 100px 0;
}

.container {
  max-width: 1100px;
}

h1, h2, h3, h4, h5 {
  letter-spacing: 1px;
}

/* navbar*/

.navbar {
  background-color: rgba(0, 0, 0, 0.95) !important;
  border-bottom: 1px solid #111;
}

.navbar-brand {
  letter-spacing: 3px;
  font-weight: bold;
}

.nav-link {
  color: #ccc !important;
  transition: color 0.3s ease;
}

.nav-link:hover {
  color: white !important;
}

/* hero section */

.hero {
  height: 100vh;
  background: url("hero.jpg") center center / cover no-repeat;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-overlay {
  background: rgba(0, 0, 0, 0.65);
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-content {
  text-align: center;
}

.hero-content h1 {
  font-size: clamp(3rem, 8vw, 6rem);
  letter-spacing: 6px;
  margin-bottom: 20px;
}

.hero-content p {
  font-size: 1.25rem;
  max-width: 700px;
  margin: auto;
  color: #ccc;
}

/* about */

#about {
  max-width: 900px;
  margin: auto;
  line-height: 1.8;
}

#about p {
  color: #ddd;
  margin-bottom: 25px;
}

/* process images */

.process-images {
  display: flex;
  justify-content: center;
  gap: 50px;
  flex-wrap: wrap;
  margin-bottom: 80px;
}

/*image scaling */
.process-img {
  width: 300px;
  height: auto;
  border-radius: 14px;
  transition: transform 0.4s ease, opacity 0.4s ease;
  opacity: 0.9;
}

.process-img:hover {
  transform: scale(1.05);
  opacity: 1;
}

/* timeline */

.timeline-item {
  margin-bottom: 70px;
  padding-bottom: 25px;
  border-bottom: 1px solid #222;
}

.timeline-item:last-child {
  border-bottom: none;
}

.timeline-item h5 {
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: 1px;
}

.timeline-item p {
  color: #bbb;
  line-height: 1.7;
}

/* footer */

footer {
  background-color: black;
  border-top: 1px solid #111;
  text-align: center;
  padding: 30px 0;
}

footer small {
  color: #777;
  letter-spacing: 1px;
}

/* responsivity */

@media (max-width: 768px) {
  section {
    padding: 70px 0;
  }

  .process-img {
    width: 85%;
  }

  .hero-content h1 {
    letter-spacing: 3px;
  }
}