/* Theme Variables */
:root {
  --bg-color: #0f1117;
  --text-color: #f0f0f0;
  --accent: #5eead4;
  --card-bg: #1a1c23;
  --border-color: #2e2e3e;
  --hover-bg: #2dd4bf;
  --hover-text: #ffffff;
}

body.light-theme {
  --bg-color: #ffffff;
  --text-color: #1a1c23;
  --accent: #2563eb;
  --card-bg: #f3f4f6;
  --border-color: #e5e7eb;
  --hover-bg: #e0e7ff;
  --hover-text: #1a1c23;
}

/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  scroll-behavior: smooth;
}

#theme-toggle {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--accent);
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  padding-bottom: 4rem;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--card-bg);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
}

.navbar .logo {
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--accent);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

.nav-links a {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--accent);
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 6rem 2rem 4rem;
  background: linear-gradient(to right, var(--card-bg), var(--bg-color));
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--accent);
}

.hero-buttons {
  margin-top: 1.5rem;
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.button, .button-outline {
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.3s ease;
}

.button {
  background-color: var(--accent);
  color: var(--bg-color);
}

.button:hover {
  background-color: var(--hover-bg);
}

.button-outline {
  border: 2px solid var(--accent);
  color: var(--accent);
}

.button-outline:hover {
  background-color: var(--card-bg);
  color: var(--hover-text);
}

/* Section */
.section {
  padding: 4rem 2rem;
  max-width: 960px;
  margin: auto;
  background-color: var(--bg-color);
  color: var(--text-color);
}

.section h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--accent);
}

.timeline {
  border-left: 2px solid var(--accent);
  padding-left: 1rem;
}

.timeline-item {
  margin-bottom: 2rem;
}

.timeline-date {
  font-size: 0.9rem;
  color: #a0aec0;
  margin-bottom: 0.3rem;
  display: block;
}

.project-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.project-card {
  background-color: var(--card-bg);
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  transition: transform 0.2s;
}

.project-card:hover {
  transform: scale(1.02);
}

.project-card h3 {
  margin-bottom: 0.5rem;
  color: var(--accent);
}

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

.reading-list ul {
  list-style-type: disc;
  padding-left: 1.5rem;
}

.reading-list li {
  margin-bottom: 0.75rem;
}

.reading-list a {
  color: #facc15;
  text-decoration: none;
}

.reading-list a:hover {
  text-decoration: underline;
}

.social-icons {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

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

footer {
  text-align: center;
  margin-top: 4rem;
  font-size: 0.9rem;
  color: #777;
  padding: 2rem 0;
  border-top: 1px solid var(--border-color);
}