/* ========================================
   George Ingebretsen — Personal Site
   ======================================== */

/* ---------- Theme Colors ---------- */
:root,
[data-theme="dark"] {
  --bg: #0a0a0a;
  --text: #e0e0e0;
  --text-secondary: #888;
  --link: #8ab4f8;
  --link-hover: #aecbfa;
  --border: rgba(255, 255, 255, 0.08);
  --selection-bg: rgba(138, 180, 248, 0.3);
  --selection-text: #fff;
}

[data-theme="light"] {
  --bg: #fffff8;
  --text: #1a1a1a;
  --text-secondary: #555;
  --link: #0645ad;
  --link-hover: #0b0080;
  --border: rgba(0, 0, 0, 0.1);
  --selection-bg: rgba(255, 215, 0, 0.4);
  --selection-text: #000;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html, body {
  transition: background-color 0.3s ease, color 0.3s ease;
}

body {
  background: var(--bg);
  max-width: 640px;
  margin: 0 auto;
  padding: 5rem 1.5rem 3rem;
}

::selection {
  background: var(--selection-bg);
  color: var(--selection-text);
}

/* ---------- Links ---------- */
a {
  color: var(--link);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--link-hover);
}

/* ---------- Theme Toggle ---------- */
.theme-toggle {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.4rem;
  cursor: pointer;
  padding: 0.25rem;
  transition: transform 0.2s ease, color 0.2s ease;
  z-index: 100;
  line-height: 1;
}

.theme-toggle:hover {
  transform: scale(1.15);
  color: var(--text);
}

/* ---------- Hero ---------- */
.hero {
  text-align: center;
  margin-bottom: 2.5rem;
}

.avatar {
  width: 130px;
  height: 130px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-size: 1.9rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
  margin-bottom: 0.4rem;
}

.tagline {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.5;
  margin-bottom: 1.25rem;
}

.tagline a {
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.tagline a:hover {
  color: var(--link);
  border-color: var(--link);
}

/* ---------- Social Links ---------- */
.social-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.social-links a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
  transition: color 0.2s ease;
}

.social-links a:hover {
  color: var(--text);
}

/* ---------- Divider ---------- */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

/* ---------- Bio ---------- */
.bio p {
  font-size: 0.95rem;
  margin-bottom: 0.85rem;
  line-height: 1.75;
}

.bio p:last-child {
  margin-bottom: 0;
}

/* ---------- Section Headings ---------- */
h2 {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

/* ---------- Publications ---------- */
.publications {
  list-style: none;
  padding: 0;
}

.publications li {
  margin-bottom: 1.1rem;
}

.publications li:last-child {
  margin-bottom: 0;
}

.pub-title {
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.4;
}

.pub-authors {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.15rem;
  line-height: 1.4;
}

.pub-venue {
  display: block;
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-style: italic;
  margin-top: 0.1rem;
}

/* ---------- Writing ---------- */
.writing p {
  font-size: 0.95rem;
}

/* ---------- Footer ---------- */
.footer {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.footer a {
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}

.footer a:hover {
  color: var(--link);
  border-color: var(--link);
}

/* ---------- Animation ---------- */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

main {
  animation: fadeIn 0.5s ease both;
}

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
  body {
    padding: 3.5rem 1.25rem 2rem;
  }

  .hero h1 {
    font-size: 1.6rem;
  }

  .social-links {
    gap: 1rem;
  }

  .theme-toggle {
    top: 1rem;
    right: 1rem;
  }
}