:root {
  --transition-speed: 0.3s;
}

body {
  font-family: 'Roboto', sans-serif;
  transition: background-color var(--transition-speed), color var(--transition-speed);
  scroll-behavior: smooth;
  background-color: #ffffff;
  color: #000000;
  overflow-x: hidden;
}

body.dark-mode {
  background-color: #121212;
  color: #f1f1f1;
}

/* Navbar */
body.dark-mode .navbar {
  background-color: #1f1f1f !important;
}

body.dark-mode .navbar a,
body.dark-mode .navbar-brand,
body.dark-mode .nav-link,
body.dark-mode .btn-outline-light {
  color: #f1f1f1 !important;
}

/* Section spacing */
.section {
  padding: 4rem 1rem;
}

@media (min-width: 768px) {
  .section {
    padding: 6rem 2rem;
  }
}

/* Card styles */
.card {
  transition: transform 0.3s ease-in-out;
  height: 100%;
  opacity: 0;
  transform: translateY(20px);
}

.card.fade-in {
  opacity: 1;
  transform: translateY(0);
}

.card:hover {
  transform: translateY(-5px);
}

.card-body {
  font-weight: 500;
  font-size: 1rem;
  text-align: center;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Input focus */
textarea:focus,
input:focus {
  outline: none !important;
  border: 1px solid #0d6efd !important;
  box-shadow: 0 0 5px rgba(13, 110, 253, 0.5);
}

/* Scroll Progress Bar */
#scrollProgress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 5px;
  background: #0d6efd;
  z-index: 9999;
}

/* Back to Top Button */
#backToTop {
  position: fixed;
  bottom: 30px;
  right: 30px;
  display: none;
  padding: 0.6rem 1rem;
  font-size: 1.2rem;
  border: none;
  border-radius: 50%;
  background-color: #0d6efd;
  color: white;
  cursor: pointer;
  z-index: 10000;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
  transition: background 0.3s ease;
}

#backToTop:hover {
  background-color: #0b5ed7;
}

/* Footer */
footer {
  font-size: 0.9rem;
  background-color: #333;
  color: white;
}

body.dark-mode footer {
  background-color: #000;
  color: #ccc;
}

/* Animations */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeIn 1s forwards;
}

@keyframes fadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Dark mode card fix */
body.dark-mode .card,
body.dark-mode .about-card {
  background-color: #1e1e1e;
  color: white;
}

body.dark-mode .btn {
  background-color: #0d6efd;
  color: white;
}

body.dark-mode input,
body.dark-mode textarea {
  background-color: #2a2a2a;
  color: white;
  border-color: #444;
}

/* About section dark theme */
body.dark-mode .about-section {
  background-color: #1a1a1a;
  color: #eaeaea;
}

body.dark-mode .about-card p,
body.dark-mode .about-card h4,
body.dark-mode .about-card h6,
body.dark-mode .about-card small {
  color: #ddd !important;
}

body.dark-mode .about-card img {
  filter: brightness(0.9);
}

/* Social Icons Fade-in */
footer a img,
.social-icons a img {
  transition: transform 0.3s ease-in-out, opacity 0.3s ease-in-out;
  opacity: 0;
  transform: translateY(20px);
}

footer a.animate-icon img,
.social-icons a.animate-icon img {
  opacity: 1;
  transform: translateY(0);
}