@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --bg-color: #ffffff;
  --text-primary: #1d1d1f;
  --text-secondary: #86868b;
  --accent-color: #0071e3;
  --card-bg: #f5f5f7;
  --border-color: #d2d2d7;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1 {
  font-size: 3.5rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.1;
  margin-bottom: 1rem;
}

h2 {
  font-size: 2.5rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 2rem;
  text-align: center;
}

h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 1.5rem;
}

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

a:hover {
  text-decoration: underline;
}

/* Layout */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 4rem 0;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

section.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Hero Section */
.hero {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding-top: 6rem;
  padding-bottom: 2rem;
}

.avatar-container {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  overflow: hidden;
  margin-bottom: 2rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  transition: var(--transition);
}

.avatar-container:hover {
  transform: scale(1.05);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.avatar-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero p {
  font-size: 1.25rem;
  max-width: 700px;
}

.social-links {
  display: flex;
  gap: 1.5rem;
  margin-top: 2rem;
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 980px;
  background-color: var(--card-bg);
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.95rem;
}

.social-links a:hover {
  background-color: var(--border-color);
  text-decoration: none;
}

.social-links a.primary {
  background-color: var(--text-primary);
  color: var(--bg-color);
}

.social-links a.primary:hover {
  background-color: #000;
}

/* Grid Layout for Cards */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

/* Cards */
.card {
  background-color: var(--card-bg);
  border-radius: 24px;
  padding: 2.5rem;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.card h3 {
  margin-bottom: 1rem;
}

.card p {
  font-size: 1rem;
  margin: 0 0 1rem 0;
  max-width: none;
}

.card .meta {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 0.5rem;
}

.card ul {
  list-style: none;
  margin-top: 1rem;
}

.card ul li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.card ul li::before {
  content: "•";
  color: var(--accent-color);
  position: absolute;
  left: 0;
  font-weight: bold;
}

/* Tags for Skills */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.tag {
  background-color: var(--card-bg);
  padding: 0.75rem 1.5rem;
  border-radius: 980px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
}

.tag:hover {
  background-color: var(--text-primary);
  color: var(--bg-color);
  transform: scale(1.05);
}

/* Footer */
footer {
  text-align: center;
  padding: 3rem 0;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1.1rem;
  }

  .social-links {
    flex-direction: column;
    width: 100%;
    max-width: 300px;
  }

  .social-links a {
    width: 100%;
  }

  section {
    padding: 4rem 0;
  }

  .card {
    padding: 2rem;
  }

  .theme-toggle {
    display: none; /* Hide on mobile as requested (for PC user) */
  }
}

/* Floating Theme Toggle */
.theme-toggle {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background-color: var(--card-bg);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transition: var(--transition);
  z-index: 1000;
}

.theme-toggle:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
}

/* Dark Mode Variables and Overrides */
:root[data-theme="dark"] {
  --bg-color: #000000;
  --text-primary: #f5f5f7;
  --text-secondary: #a1a1a6;
  --accent-color: #2997ff;
  --card-bg: #1c1c1e;
  --border-color: #38383a;
}

:root[data-theme="dark"] .avatar-container {
  box-shadow: 0 10px 30px rgba(255, 255, 255, 0.05);
  background-color: #000000;
}

:root[data-theme="dark"] .avatar-container:hover {
  box-shadow: 0 15px 40px rgba(255, 255, 255, 0.1);
}

:root[data-theme="dark"] .card:hover {
  box-shadow: 0 10px 30px rgba(255, 255, 255, 0.05);
}

:root[data-theme="dark"] .social-links a.primary {
  background-color: #38383a;
  color: #f5f5f7;
}

:root[data-theme="dark"] .social-links a.primary:hover {
  background-color: #48484a;
}