/*
 * Personal site theme - Julián Perelli
 * Minimal, reading-focused, light/dark.
 */

/* ---------- Design tokens ---------- */
:root {
  --max-width: 46rem;

  --bg: #ffffff;
  --bg-soft: #f6f7f9;
  --bg-card: #ffffff;
  --text: #24292f;
  --text-soft: #57606a;
  --text-faint: #8b949e;
  --border: #e6e8eb;
  --accent: #2563eb;
  --accent-soft: #dbeafe;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 4px 16px rgba(16, 24, 40, 0.06);
  --shadow-hover: 0 2px 4px rgba(16, 24, 40, 0.06), 0 12px 28px rgba(16, 24, 40, 0.12);
}

:root[data-theme="dark"] {
  --bg: #0d1117;
  --bg-soft: #161b22;
  --bg-card: #161b22;
  --text: #e6edf3;
  --text-soft: #9da7b3;
  --text-faint: #6e7681;
  --border: #232a33;
  --accent: #58a6ff;
  --accent-soft: #1b2a44;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 4px 16px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 2px 4px rgba(0, 0, 0, 0.4), 0 12px 28px rgba(0, 0, 0, 0.5);
}

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

html,
body {
  margin: 0;
  padding: 0;
}

html {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica,
    Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  color: var(--text);
  background-color: var(--bg);
  transition: background-color 0.2s ease, color 0.2s ease;
}

/* ---------- Layout ---------- */
.container {
  max-width: var(--max-width);
  padding: 0 1.5rem;
  margin: 0 auto;
}

/* ---------- Typography ---------- */
h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 2.2rem 0 0.8rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--text);
}
h1 { font-size: 2rem; margin-top: 0; }
h2 { font-size: 1.45rem; }
h3 { font-size: 1.2rem; }
h4, h5, h6 { font-size: 1rem; }

p { margin: 0 0 1.1rem; }

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

strong { color: var(--text); font-weight: 650; }

ul, ol { margin: 0 0 1.1rem; padding-left: 1.4rem; }
li { margin-bottom: 0.3rem; }

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}

blockquote {
  margin: 1.4rem 0;
  padding: 0.2rem 0 0.2rem 1.1rem;
  color: var(--text-soft);
  border-left: 3px solid var(--border);
}
blockquote p:last-child { margin-bottom: 0; }

img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 0 1.2rem;
  border-radius: 8px;
}

/* ---------- Code ---------- */
code,
pre {
  font-family: "JetBrains Mono", "Fira Code", Menlo, Monaco, "Courier New",
    monospace;
}
code {
  padding: 0.15em 0.4em;
  font-size: 0.85em;
  color: var(--text);
  background-color: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 5px;
}
pre {
  margin: 0 0 1.2rem;
  padding: 1rem 1.2rem;
  font-size: 0.85rem;
  line-height: 1.5;
  overflow-x: auto;
  white-space: pre;
  border-radius: 10px;
}
pre code {
  padding: 0;
  font-size: 100%;
  color: inherit;
  background: transparent;
  border: 0;
}
.highlight {
  margin: 0 0 1.2rem;
  border-radius: 10px;
  box-shadow: var(--shadow);
}
.highlight pre { margin: 0; }

/* ---------- Tables ---------- */
table {
  width: 100%;
  margin-bottom: 1.2rem;
  border-collapse: collapse;
  font-size: 0.95rem;
}
th, td {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  text-align: left;
}
thead th { background-color: var(--bg-soft); }
tbody tr:nth-child(odd) td { background-color: var(--bg-soft); }

/* ---------- Header / nav ---------- */
.site-header {
  border-bottom: 1px solid var(--border);
  background-color: var(--bg);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1.1rem;
  padding-bottom: 1.1rem;
}
.site-name {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  color: var(--text);
}
.site-name:hover { text-decoration: none; color: var(--accent); }
.site-nav {
  display: flex;
  align-items: center;
  gap: 1.3rem;
}
.site-nav a {
  color: var(--text-soft);
  font-size: 0.95rem;
  font-weight: 500;
}
.site-nav a:hover { color: var(--accent); text-decoration: none; }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-soft);
  color: var(--text-soft);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  transition: background 0.15s ease, color 0.15s ease;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }
.theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: inline; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* ---------- Content wrapper ---------- */
.content {
  padding-top: 3rem;
  padding-bottom: 4rem;
  min-height: 60vh;
}

/* ---------- Posts & pages ---------- */
.post-title,
.page-title {
  margin-bottom: 0.4rem;
}
.post-date {
  display: block;
  margin-bottom: 1.8rem;
  color: var(--text-faint);
  font-size: 0.9rem;
}

.hero-image {
  height: 300px;
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
  border-radius: 12px;
  opacity: 0.85;
}
/* Title overlaid on the foreground of the hero image */
.hero-image + .page-title {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  height: 300px;
  margin: -300px 0 1.8rem;
  padding: 1.6rem 1.8rem;
  border-radius: 12px;
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.75) 0%,
    rgba(0, 0, 0, 0.65) 55%,
    rgba(0, 0, 0, 0.4) 85%,
    rgba(0, 0, 0, 0.2) 100%
  );
}
.hero-image + .page-title > .page-title {
  margin: 0;
  color: #fff;
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.6);
}

/* ---------- Home intro ---------- */
.intro {
  font-size: 1.2rem;
  line-height: 1.6;
  color: var(--text);
  margin-bottom: 1.6rem;
}
.intro .role { color: var(--accent); font-weight: 650; }
.lead { font-size: 1.15rem; color: var(--text-soft); }

.social-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 1.8rem 0 2.5rem;
}
.social-row a {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.9rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-soft);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  transition: all 0.15s ease;
}
.social-row a:hover {
  color: var(--accent);
  border-color: var(--accent);
  text-decoration: none;
  transform: translateY(-1px);
}

/* ---------- Cards (projects) ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.1rem;
  margin: 1.5rem 0;
}
.card {
  display: flex;
  flex-direction: column;
  padding: 1.25rem 1.3rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow);
  transition: transform 0.15s ease, box-shadow 0.15s ease,
    border-color 0.15s ease;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
  text-decoration: none;
}
.card-year {
  font-size: 0.8rem;
  color: var(--text-faint);
  font-weight: 600;
  letter-spacing: 0.02em;
}
.card-title {
  margin: 0.25rem 0 0.5rem;
  font-size: 1.1rem;
  font-weight: 650;
  color: var(--text);
}
.card-desc {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--text-soft);
}

/* ---------- Archive (blog / talks lists) ---------- */
.archive { margin-top: 1.5rem; }
.archive .item {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--border);
}
.archive .item a {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  width: 100%;
  color: var(--text);
}
.archive .item a:hover { color: var(--accent); text-decoration: none; }
.archive .date {
  flex-shrink: 0;
  font-size: 0.85rem;
  color: var(--text-faint);
  font-variant-numeric: tabular-nums;
  min-width: 4.5rem;
}

/* ---------- Related posts ---------- */
.related {
  margin-top: 3rem;
  padding-top: 1.8rem;
  border-top: 1px solid var(--border);
}
.related h2 { font-size: 1.1rem; margin-top: 0; }
.related-posts { padding: 0; list-style: none; }
.related-posts h3 { margin: 0.6rem 0; font-size: 1rem; font-weight: 500; }
.related-posts small { color: var(--text-faint); font-weight: 400; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  color: var(--text-faint);
  font-size: 0.9rem;
}
.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.site-footer a { color: var(--text-soft); }
.site-footer a:hover { color: var(--accent); }
.footer-links { display: flex; gap: 1.1rem; }

/* ---------- Pagination ---------- */
.pagination {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin: 3rem 0 0;
}
.pagination-item {
  flex: 1;
  padding: 0.8rem;
  text-align: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-soft);
}
a.pagination-item:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

/* ---------- Responsive ---------- */
@media (max-width: 34rem) {
  html { font-size: 1rem; }
  .site-nav { gap: 0.9rem; }
  .site-nav a { font-size: 0.9rem; }
  .content { padding-top: 2rem; }
}