:root {
  --bg-dark: #0d1117;
  --text-dark: #ffffff;
  --bg-light: #ffffff;
  --text-light: #111111;
  --accent: #4f46e5;
  --accent-light: #8b5cf6;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  /* width: 100%; */
  overflow-x: hidden;
  font-family: "Segoe UI", sans-serif;
  scroll-behavior: smooth;
}

body {
  background: var(--bg-dark);
  color: var(--text-dark);
  transition: background 0.3s ease, color 0.3s ease;
}
body.light-mode {
  background: var(--bg-light);
  color: var(--text-light);
}

.badge-tech {
  display: inline-block;
  background-color: #0d6efd;
  color: #fff;
  padding: 0.4em 0.75em;
  margin: 0.2em 0.3em 0.2em 0;
  border-radius: 0.5rem;
  font-size: 0.85rem;
  white-space: nowrap;
}

body.light-mode .badge-tech {
  background: var(--accent-light);
}

.toggle-btn {
  border-color: var(--accent);
  color: var(--accent);
  font-size: 1.2rem;
}
body.light-mode .toggle-btn {
  border-color: var(--accent-light);
  color: var(--accent-light);
}

.fade-in-section {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
  will-change: opacity, transform;
}

.fade-in-section.is-visible {
  opacity: 1;
  transition-delay: 0.3s;
  transform: translateY(0);
  transform: none;
}