/* === body== */
body {
  background: linear-gradient(135deg, #1f2937, #2c3e50, #34495e);
  color: #f1f1f1;
}

/* == contrainer == */
.container {
  width: 85%;
  margin: auto;
}

/* == navbar == */
.navbar {
  background: rgba(20, 20, 30, 0.85) !important;
  backdrop-filter: blur(10px);
  padding: 20px 0;
  box-shadow: 0 2px 15px rgba(0,0,0,0.3);
}

.navbar .navbar-brand,
.navbar .nav-link {
  color: #ffffff !important;
  font-weight: 500;
  transition: 0.3s;
}

.navbar .nav-link:hover {
  color: #00bcd4 !important;
}

/* == section hero == */
.hero {
  min-height: 100vh;
  padding-top: 100px;
  background: transparent;
}

.hero .text-muted {
  color: #e0e0e0 !important;
}

.hero h1 {
  font-size: 48px;
  font-weight: bold;
}

.hero h4 {
  color: #cfd8dc;
}

.hero p {
    letter-spacing: 3px;
  font-weight: 500;
  color: #e0e0e0;
}

.circle-img {
  width: 500px;        
  height: 500px;
  background: #2f3e50;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  box-shadow: 0 0 40px rgba(0, 188, 212, 0.15);
  margin-left: 40px;  
}

.circle-img img {
  width: 400px;      
  height: 400px;
  object-fit: cover;
  border-radius: 50%;
}

/* == section about== */
#about {
  padding: 80px 0;
  background: linear-gradient(135deg, #273549, #2f4259);
  color: #ffffff;
}

#about h2 {
  font-size: 32px;
  margin-bottom: 20px;
}

#about p {
  line-height: 1.7;
  color: #e0e0e0;
}

.progress {
  height: 10px;
  background-color: #1f2937;
}

.progress-bar {
  background: linear-gradient(90deg, #00bcd4, #0097a7);
  font-size: 10px;
}

/* == sertifikat== */
#certificates {
  padding: 80px 0;
  background: linear-gradient(135deg, #243447, #2c3e50);
}

.card {
  background: #2f3e50;
  color: #ffffff;
  border: none;
  transition: 0.3s ease;
  border-radius: 15px;
}

.card img {
  height: 200px;
  object-fit: cover;
  border-top-left-radius: 15px;
  border-top-right-radius: 15px;
}

.card:hover {
  transform: translateY(-7px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.4);
}

/* == footer == */
footer {
  background: #1a252f;
  color: #ffffff;
  padding: 20px;
  margin-top: 50px;
}