/* Root Variables */
:root {
  --bg-color: #1a1a1d;
  --accent-color: #00b8d4;
  --highlight-color: #ff7f50;
  --text-color: #f4f4f9;
  --heading-font: 'Roboto Slab', serif;
  --body-font: 'Open Sans', sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--body-font);
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
}

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background-color: var(--bg-color);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  position: sticky;
  top: 0;
  z-index: 100;
  flex-wrap: wrap;
  gap: 1rem;
}

.header-left {
  text-align: left;
}

h1 {
  font-family: var(--heading-font);
  font-size: 2rem;
  color: var(--highlight-color);
  text-transform: uppercase;
  letter-spacing: 3px;
  text-shadow: 0 4px 10px rgba(0, 184, 212, 0.5);
  margin-bottom: 0.2rem;
}

.subtitle {
  font-size: 0.9rem;
  color: var(--accent-color);
  font-weight: 600;
}

nav {
  display: flex;
  justify-content: flex-end;
  gap: 1.2rem;
  flex-wrap: wrap;
  align-items: center;
}

nav a {
  color: var(--text-color);
  font-weight: 600;
  text-decoration: none;
  padding: 0.5rem 1rem;
  position: relative;
  border-radius: 4px;
  transition: background-color 0.3s, transform 0.3s;
  font-size: 0.95rem;
}

nav a:hover {
  background-color: var(--highlight-color);
  color: var(--bg-color);
  transform: scale(1.05);
}

nav a::after {
  content: '';
  position: absolute;
  width: 0%;
  height: 2px;
  bottom: 0;
  left: 50%;
  background-color: var(--accent-color);
  transition: width 0.3s ease, left 0.3s ease;
}

nav a:hover::after {
  width: 100%;
  left: 0;
}

/* Resume Download Section */
.resume-section {
  text-align: center;
  padding: 1.5rem 2rem;
  background: linear-gradient(135deg, rgba(0, 184, 212, 0.1) 0%, rgba(255, 127, 80, 0.1) 100%);
}

.btn-download {
  padding: 0.8rem 2rem;
  background: linear-gradient(135deg, var(--accent-color) 0%, #008ba3 100%);
  color: var(--bg-color);
  border: none;
  border-radius: 50px;
  cursor: pointer;
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.3s;
  font-size: 1rem;
  font-family: var(--body-font);
  box-shadow: 0 4px 15px rgba(0, 184, 212, 0.4);
}

.btn-download:hover {
  background: linear-gradient(135deg, var(--highlight-color) 0%, #ff6347 100%);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(255, 127, 80, 0.5);
}

/* Main Content */
main {
  padding: 3rem 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.info-section,
.project-section {
  background-color: #2d2d2d;
  padding: 2rem;
  margin: 2rem 0;
  border-left: 6px solid var(--highlight-color);
  box-shadow: 0 4px 15px rgba(0, 184, 212, 0.4);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border-radius: 8px;
}

.info-section:hover,
.project-section:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 25px rgba(0, 184, 212, 0.6);
}

h2 {
  font-family: var(--heading-font);
  font-size: 2rem;
  color: var(--highlight-color);
  margin-bottom: 1.5rem;
}

h3 {
  font-family: var(--heading-font);
  font-size: 1.5rem;
  color: var(--accent-color);
  margin-bottom: 1rem;
}

p {
  font-size: 1.1rem;
  color: var(--text-color);
  line-height: 1.8;
}

/* CTA Button */
.btn-cta {
  padding: 1rem 2rem;
  background: linear-gradient(135deg, var(--highlight-color) 0%, #ff6347 100%);
  color: var(--bg-color);
  border: none;
  border-radius: 50px;
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.3s;
  font-size: 1rem;
  box-shadow: 0 4px 15px rgba(255, 127, 80, 0.4);
}

.btn-cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(255, 127, 80, 0.6);
}

/* Skills Grid */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.skill-badge {
  background-color: #3a3a3a;
  padding: 1.5rem 1rem;
  border-radius: 8px;
  text-align: center;
  border: 2px solid var(--accent-color);
  transition: transform 0.3s, border-color 0.3s, background-color 0.3s;
}

.skill-badge:hover {
  transform: translateY(-5px);
  border-color: var(--highlight-color);
  background-color: #454545;
}

.skill-badge i {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  color: var(--accent-color);
  display: block;
}

.skill-badge:hover i {
  color: var(--highlight-color);
}

.skill-badge span {
  display: block;
  font-weight: 600;
  color: var(--text-color);
  font-size: 0.85rem;
}

/* Filter Buttons */
.filter-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin: 2rem 0;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.75rem 1.5rem;
  border: 2px solid var(--accent-color);
  background: transparent;
  color: var(--text-color);
  border-radius: 50px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.3s;
  font-size: 0.9rem;
  font-family: var(--body-font);
}

.filter-btn:hover,
.filter-btn.active {
  background-color: var(--highlight-color);
  color: var(--bg-color);
  border-color: var(--highlight-color);
  transform: translateY(-2px);
}

/* Projects Grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.project-card {
  background-color: #2d2d2d;
  border-radius: 8px;
  overflow: hidden;
  border: 2px solid var(--accent-color);
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 8px 25px rgba(0, 184, 212, 0.6);
  border-color: var(--highlight-color);
}

.project-card.hidden {
  display: none;
}

.project-header {
  padding: 1.5rem;
  background: linear-gradient(135deg, var(--accent-color) 0%, #008ba3 100%);
  color: var(--bg-color);
}

.project-header h3 {
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
  color: var(--bg-color);
}

.project-category {
  font-size: 0.85rem;
  opacity: 0.9;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--bg-color);
}

.project-body {
  padding: 1.5rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.project-body p {
  color: var(--text-color);
  margin-bottom: 1rem;
  line-height: 1.6;
  font-size: 1rem;
}

.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.tech-tag {
  background-color: #3a3a3a;
  color: var(--accent-color);
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid var(--accent-color);
}

.project-links {
  display: flex;
  gap: 1rem;
  margin-top: auto;
}

.btn {
  padding: 0.7rem 1.5rem;
  border: 2px solid var(--accent-color);
  background: transparent;
  color: var(--accent-color);
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.3s;
  font-size: 0.9rem;
  font-family: var(--body-font);
}

.btn:hover {
  background-color: var(--highlight-color);
  color: var(--bg-color);
  border-color: var(--highlight-color);
  transform: translateY(-2px);
}

/* Certifications Section */
.certifications-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.cert-card {
  background-color: #3a3a3a;
  padding: 1.5rem;
  border-radius: 8px;
  border: 2px solid var(--accent-color);
  display: flex;
  gap: 1rem;
  align-items: center;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.cert-card:hover {
  transform: translateY(-5px);
  border-color: var(--highlight-color);
  box-shadow: 0 6px 20px rgba(0, 184, 212, 0.4);
}

.cert-icon {
  font-size: 2.5rem;
  color: var(--accent-color);
  flex-shrink: 0;
}

.cert-card:hover .cert-icon {
  color: var(--highlight-color);
}

.cert-content h3 {
  font-size: 1.1rem;
  color: var(--text-color);
  margin-bottom: 0.3rem;
}

.cert-issuer {
  font-size: 0.9rem;
  color: var(--accent-color);
  margin-bottom: 0.2rem;
  font-weight: 600;
}

.cert-date {
  font-size: 0.85rem;
  color: var(--text-color);
  opacity: 0.7;
}

/* Contact Section */
.contact-content {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 2rem;
}

.social-link {
  color: var(--accent-color);
  font-size: 2.5rem;
  transition: all 0.3s;
}

.social-link:hover {
  transform: scale(1.2);
  color: var(--highlight-color);
}

/* Back to Top Button */
#backToTop {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background-color: var(--highlight-color);
  color: var(--bg-color);
  border: none;
  border-radius: 50%;
  width: 60px;
  height: 60px;
  font-size: 1.5rem;
  cursor: pointer;
  display: none;
  z-index: 1000;
  transition: transform 0.3s ease-in-out;
  box-shadow: 0 4px 15px rgba(255, 127, 80, 0.5);
}

#backToTop:hover {
  background-color: var(--accent-color);
  transform: scale(1.1);
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem;
  background-color: #0d0d0f;
  margin-top: 3rem;
  border-top: 2px solid var(--accent-color);
}

footer p {
  color: var(--text-color);
  font-size: 0.9rem;
}

/* Responsive Design - Mobile */
@media (max-width: 768px) {
  header {
    flex-direction: column;
    text-align: center;
    padding: 1rem;
  }

  .header-left {
    text-align: center;
  }

  h1 {
    font-size: 1.8rem;
    letter-spacing: 2px;
  }

  .subtitle {
    font-size: 0.85rem;
  }

  nav {
    display: flex; 
    flex-direction: row;
    justify-content: center;
    
    gap: 0.5rem;
    margin-top: 1rem;
  }

  nav a {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;

  }

  .resume-section {
    padding: 1rem;
  }

  .btn-download {
    padding: 0.7rem 1.5rem;
    font-size: 0.9rem;
  }

  main {
    padding: 2rem 1rem;
  }

  .info-section,
  .project-section {
    padding: 1.5rem;
  }

  h2 {
    font-size: 1.6rem;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .certifications-grid {
    grid-template-columns: 1fr;
  }

  .skill-badge i {
    font-size: 2rem;
  }

  .filter-btn {
    font-size: 0.8rem;
    padding: 0.6rem 1rem;
  }

  .skills-grid {
    grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
    gap: 1rem;
  }

  .skill-badge {
    padding: 1rem 0.5rem;
  }

  .social-link {
    font-size: 2rem;
  }

  #backToTop {
    width: 50px;
    height: 50px;
    font-size: 1.2rem;
    bottom: 20px;
    right: 20px;
  }
}

/* Tablet adjustments */
@media (min-width: 769px) and (max-width: 1024px) {
  header {
    padding: 1rem 1.5rem;
  }

  h1 {
    font-size: 1.8rem;
  }

  nav {
    gap: 1rem;
  }

  .projects-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
}

.resume-actions {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.btn-linkedin {
  padding: 0.8rem 2rem;
  background: linear-gradient(135deg, #0077b5 0%, #005582 100%);
  color: white;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.3s;
  font-size: 1rem;
  font-family: var(--body-font);
  box-shadow: 0 4px 15px rgba(0, 119, 181, 0.4);
}

.btn-linkedin:hover {
  background: linear-gradient(135deg, #005582 0%, #003d5c 100%);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 119, 181, 0.6);
}