:root {
  --bg-light: #f0f0f4;
  --bg-dark: #1e1f26;
  --text-light: #1e1f26;
  --text-dark: #e4e4e4;
  --card-light: #ffffff;
  --card-dark: #2b2d3a;
  --accent: #008cff;
}

body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background-color: var(--bg-light);
  color: var(--text-light);
  transition: background 0.3s ease, color 0.3s ease;
}

body.dark {
  background-color: var(--bg-dark);
  color: var(--text-dark);
}

.container {
  max-width: 850px;
  margin: 60px auto;
  padding: 20px;
}

.card {
  background: var(--card-light);
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.05);
  transition: background 0.3s ease;
}

body.dark .card {
  background: var(--card-dark);
}

.header {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.profile-pic {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background-image: url('pic.jpg');
  background-size: cover;
  background-position: center;
  border: 3px solid var(--accent);
  flex-shrink: 0;
}

h1 {
  margin: 0;
  font-size: 2rem;
}

.subtitle {
  color: var(--accent);
  font-weight: 500;
  margin-top: 5px;
}

section {
  margin-top: 30px;
}

h2 {
  font-size: 1.3rem;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
  padding-bottom: 4px;
}

ul {
  padding-left: 20px;
}

.tags {
  margin-top: 10px;
}

.tag {
  display: inline-block;
  background-color: var(--accent);
  color: white;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.85rem;
  margin: 5px 5px 0 0;
}

a {
  color: var(--accent);
  text-decoration: none;
}

footer {
  text-align: center;
  margin-top: 40px;
  font-size: 0.9rem;
  opacity: 0.6;
}

/* Theme Switch */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 99;
}

.switch {
  width: 60px;
  height: 30px;
  position: relative;
  display: inline-block;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  background-color: #ccc;
  border-radius: 34px;
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  transition: 0.4s;
}

.switch input:checked + .slider {
  background-color: var(--accent);
}

.slider:before {
  content: "";
  position: absolute;
  height: 24px;
  width: 24px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  border-radius: 50%;
  transition: transform 0.4s;
}

.switch input:checked + .slider:before {
  transform: translateX(30px);
}

@media (max-width: 600px) {
  .header {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .profile-pic {
    width: 80px;
    height: 80px;
  }

  .card {
    padding: 20px;
  }
}