/* CSS Variables for Theme */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --secondary: #64748b;
  --dark: #1e293b;
  --light: #f8fafc;
  --accent: #0ea5e9;
  --bg-color: #ffffff;
  --text-color: #1e293b;
  --card-bg: #ffffff;
  --header-bg: #ffffff;
  --footer-bg: #1e293b;
  --shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  --transition: all 0.3s ease;
}

.dark-theme {
  --bg-color: #0f172a;
  --text-color: #f1f5f9;
  --card-bg: #1e293b;
  --header-bg: #1e293b;
  --footer-bg: #0f172a;
  --shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  transition: var(--transition);
}
 
.certificate {
  background-color: var(--card-bg);
  padding: 30px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  margin-top: 40px;
}

.certificate h3 {
  color: var(--primary);
  margin-bottom: 1rem;
}

.certificate ul {
  list-style: disc;
  padding-left: 20px;
  margin-bottom: 1.5rem;
}


/* Layouts */
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

section {
  padding: 80px 0;
}

h1, h2, h3, h4 {
  margin-bottom: 1rem;
  color: var(--text-color);
}

h1 { font-size: 3rem; font-weight: 700; }
h2 {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
}
h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background-color: var(--primary);
}
p { margin-bottom: 1.5rem; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 30px;
  background-color: var(--primary);
  color: white;
  text-decoration: none;
  border-radius: 5px;
  font-weight: 600;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}
.btn:hover {
  background-color: var(--primary-dark);
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}
.btn-outline {
  background-color: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}
.btn-outline:hover {
  background-color: var(--primary);
  color: white;
}

/* Header & Navigation */
header {
  background-color: var(--header-bg);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  transition: var(--transition);
}
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
}
.logo { font-size: 1.5rem; font-weight: 700; color: var(--primary); }
.nav-links { display: flex; list-style: none; }
.nav-links li { margin-left: 30px; }
.nav-links a {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}
.nav-links a:hover, .nav-links a.active { color: var(--primary); }
.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--primary);
}
.theme-toggle { background: none; border: none; color: var(--text-color); cursor: pointer; font-size: 1.2rem; margin-left: 20px; }
.hamburger { display: none; cursor: pointer; }

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: white;
  padding: 150px 0 100px;
  text-align: center;
  animation: fadeIn 1s ease-in;
}
.hero h1 { font-size: 3.5rem; margin-bottom: 1rem; color: white; }
.hero p { font-size: 1.2rem; max-width: 700px; margin: 0 auto 2rem; }
.profile-img {
  width: 200px; height: 200px; border-radius: 50%; object-fit: cover;
  border: 5px solid white; margin: 0 auto 2rem; display: block;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}
.hero-buttons { display: flex; gap: 15px; justify-content: center; flex-wrap: wrap; }

/* Quick Links */
.quick-links { background-color: var(--bg-color); animation: fadeIn 1s ease-in; }
.links-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
.link-card {
  background-color: var(--card-bg);
  padding: 40px 30px;
  border-radius: 10px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.link-card:hover { transform: translateY(-10px); }
.link-card i { font-size: 3rem; color: var(--primary); margin-bottom: 20px; }
.link-card h3 { margin-bottom: 15px; }

/* Footer */
footer { background-color: var(--footer-bg); color: white; padding: 50px 0 20px; }
.footer-content { display: flex; justify-content: space-between; align-items: center; margin-bottom: 30px; }
.social-links { display: flex; gap: 15px; }
.social-link {
  width: 40px; height: 40px;
  background-color: rgba(255,255,255,0.1);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: white; text-decoration: none;
  transition: var(--transition);
}
.social-link:hover { transform: translateY(-3px); }
.social-link.linkedin:hover { background-color: #0a66c2; }
.social-link.twitter:hover { background-color: #1da1f2; }
.social-link.facebook:hover { background-color: #1877f2; }
.social-link.tiktok:hover { background-color: #000000; }
.social-link.whatsapp:hover { background-color: #25d366; }
.copyright { text-align: center; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.1); font-size: 0.9rem; color: #94a3b8; }

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Responsive */
@media (max-width: 768px) {
  .hamburger { display: block; }
  .nav-links {
    position: fixed; top: 70px; right: -100%; width: 80%; height: calc(100vh - 70px);
    background-color: var(--header-bg); flex-direction: column; align-items: center;
    justify-content: flex-start; padding-top: 50px; transition: var(--transition);
    box-shadow: -5px 0 15px rgba(0,0,0,0.1);
  }
  .nav-links.active { right: 0; }
  .nav-links li { margin: 15px 0; }
  .hero h1 { font-size: 2.5rem; }
  .footer-content { flex-direction: column; gap: 30px; text-align: center; }
  .hero-buttons { flex-direction: column; align-items: center; }
  .hero-buttons .btn { width: 100%; max-width: 250px; }
}
@media (max-width: 480px) {
  .container { width: 95%; padding: 0 10px; }
  section { padding: 60px 0; }
  h1 { font-size: 2rem; }
  h2 { font-size: 1.8rem; }
}