/* ============================================
   BASE STYLES
   ============================================ */

:root {
  --color-text: #222;
  --color-text-secondary: #666;
  --color-heading: #222;
  --color-bg: #fff;
  --color-border: #ddd;

  --font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --sidebar-width: 140px;
  --content-max-width: 720px;
  --transition: 0.2s ease;

  /* Index page layout locks — sidebar & content share these so alignment never drifts */
  --index-content-top: 7rem;
  --profile-pic-size: 250px;
  --h1-font-size: 1.75rem;
  --h1-line-height: 1.2;
  --about-name-pad-bottom: 0.6rem;
  /* Sidebar bottom = image bottom. Image bottom = content-top + name-height + pic-size */
  --sidebar-top: calc(
    var(--index-content-top)
    + var(--h1-font-size) * var(--h1-line-height)
    + var(--about-name-pad-bottom)
    + var(--profile-pic-size)
  );
}

*, *::before, *::after { box-sizing: border-box; }

body {
  font-family: var(--font-family);
  font-weight: 400;
  color: var(--color-text);
  background-color: var(--color-bg);
  font-size: 16px;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

/* ============================================
   LAYOUT — sidebar + content
   ============================================ */
.page {
  max-width: 960px;
  margin: 0 auto;
  min-height: 100vh;
}

.sidebar {
  position: fixed;
  top: var(--sidebar-top);
  left: max(0px, calc(50% - 480px));
  width: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  padding-right: 1.5rem;
  border-right: 1px solid var(--color-border);
  transform: translateY(-100%);
}

.sidebar a {
  display: block;
  text-decoration: none;
  color: var(--color-text-secondary);
  font-size: 1rem;
  font-weight: 400;
  padding: 0.35rem 0;
  transition: color var(--transition);
  text-align: right;
}

.sidebar a:hover {
  color: var(--color-heading);
  text-decoration: none;
}

.sidebar a.active {
  color: #000;
  font-weight: 600;
  border-right: 3px solid #000;
  margin-right: -1.5rem;
  padding-right: calc(1.5rem - 3px);
}

.content {
  max-width: var(--content-max-width);
  margin-left: var(--sidebar-width);
  padding: 5rem 1.5rem 3rem;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1 {
  font-size: var(--h1-font-size);
  font-weight: 600;
  color: var(--color-heading);
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
  line-height: var(--h1-line-height);
}

h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-heading);
  margin: 2.5rem 0 0.5rem;
  padding-bottom: 0.4rem;
  margin-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-heading);
  letter-spacing: -0.015em;
}

h2:first-child { margin-top: 0; }

h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-heading);
  margin: 0;
  line-height: 1.35;
}

p { margin: 0 0 0.75rem; }

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

a:hover {
  text-decoration: underline;
  color: var(--color-text-secondary);
}

/* ============================================
   SOCIAL ICONS (below profile pic)
   ============================================ */
.social-icons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin: 0.75rem 0 0.5rem;
}

.social-icons a {
  color: var(--color-text-secondary);
  font-size: 2rem;
  transition: color var(--transition);
}

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

/* ============================================
   MOBILE — sidebar becomes top bar
   ============================================ */
@media (max-width: 720px) {
  .sidebar {
    position: static;
    width: 100%;
    left: auto;
    transform: none;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 1.25rem;
    padding: 0.75rem 1rem;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }

  .sidebar a {
    padding: 0.25rem 0;
    font-size: 0.82rem;
  }

  .sidebar a.active {
    border-right: none;
    margin-right: 0;
    padding-right: 0;
    border-bottom: 2px solid var(--color-heading);
    padding-bottom: calc(0.25rem - 2px);
  }

  .content {
    margin-left: 0;
    padding: 1.5rem 1.25rem 2rem;
  }

  h1 { font-size: 1.35rem; }
  h2 { font-size: 1rem; }
}