/* =============================================================================
   Davide Pafumi — lightweight Jekyll theme
   Reproduces the al-folio look (Roboto / Roboto Slab, purple accent) with
   plain hand-written CSS and no heavy framework or JavaScript.
   ============================================================================= */

:root {
  --accent: #67aeda;
  --accent-dark: #386988;
  --text: #1c1c1d;
  --text-muted: #828282;
  --bg: #ffffff;
  --border: #e8e8e8;
  --max-width: 930px;
  --font-sans: "Roboto", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-slab: "Roboto Slab", Georgia, "Times New Roman", serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ----------------------------------------------------------------- links --- */
a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s ease;
}
a:hover { color: var(--accent-dark); text-decoration: none; }

/* --------------------------------------------------------------- headings --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-slab);
  font-weight: 400;
  line-height: 1.25;
  color: var(--text);
  margin: 1.8rem 0 0.8rem;
}
h1 { font-size: 2.1rem; }
h2 { font-size: 1.6rem; }
h3 { font-size: 1.3rem; }
h4 { font-size: 1.1rem; }

p { margin: 0 0 1rem; }

img { max-width: 100%; height: auto; }

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

blockquote {
  margin: 1.5rem 0;
  padding: 0.4rem 1.2rem;
  border-left: 3px solid var(--accent);
  color: #4a4a4a;
  font-style: italic;
}
blockquote p:last-child { margin-bottom: 0; }

code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.85em;
  background: rgba(130, 130, 130, 0.08);
  padding: 0.15em 0.4em;
  border-radius: 3px;
}
pre {
  background: rgba(130, 130, 130, 0.08);
  padding: 1rem;
  border-radius: 6px;
  overflow-x: auto;
}
pre code { background: none; padding: 0; }

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

table { border-collapse: collapse; width: 100%; margin: 1.2rem 0; }
th, td { border: 1px solid var(--border); padding: 0.5rem 0.7rem; text-align: left; }
th { background: rgba(130, 130, 130, 0.06); }

/* ----------------------------------------------------------------- header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: saturate(180%) blur(6px);
  border-bottom: 1px solid var(--border);
}
.navbar {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.8rem 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  font-family: var(--font-slab);
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--text);
}
.brand:hover { color: var(--accent); }

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.2rem;
  margin: 0;
  padding: 0;
}
.nav-links a {
  color: var(--text-muted);
  font-size: 1rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.nav-links a:hover,
.nav-links a.active { color: var(--accent); }

/* mobile nav toggle (pure CSS checkbox hack) */
.nav-toggle { display: none; }
.nav-toggle-label { display: none; cursor: pointer; }
.nav-toggle-label span {
  display: block;
  width: 24px;
  height: 2px;
  margin: 5px 0;
  background: var(--text);
  transition: 0.2s;
}

/* --------------------------------------------------------------- content --- */
.page-content { padding: 2.5rem 0 3rem; }

.post-header { margin-bottom: 1.5rem; }
.post-title {
  font-size: 2.6rem;
  font-weight: 700;
  margin: 0;
}
.desc {
  color: var(--text-muted);
  font-size: 1.15rem;
  margin: 0.3rem 0 0;
}
.post-meta {
  color: var(--text-muted);
  font-size: 0.9rem;
}
.post-meta .tag {
  background: rgba(181, 9, 172, 0.08);
  color: var(--accent);
  border-radius: 4px;
  padding: 0.1rem 0.45rem;
  font-size: 0.8rem;
}
.post-content { margin-top: 1rem; }
.back-link { margin-top: 2.5rem; font-size: 0.95rem; }

.clearfix::after { content: ""; display: table; clear: both; }

/* --------------------------------------------------------------- profile --- */
.profile { margin: 0 0 1rem; }
.profile.float-right { float: right; width: 32%; margin-left: 1.8rem; margin-bottom: 1rem; }
.profile.float-left  { float: left;  width: 32%; margin-right: 1.8rem; margin-bottom: 1rem; }
.profile-img {
  width: 100%;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.12);
}
.profile-img.rounded-circle { border-radius: 50%; }
.profile .more-info {
  margin-top: 0.6rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
}

/* ---------------------------------------------------------------- social --- */
.social { margin-top: 2.5rem; text-align: center; }
.social-icons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.1rem;
  font-size: 1.5rem;
}
.social-icons a { color: var(--text-muted); }
.social-icons a:hover { color: var(--accent); }
.contact-note {
  margin-top: 1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* -------------------------------------------------------------- projects --- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
  margin: 1.5rem 0;
}
.project-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  display: flex;
  flex-direction: column;
}
.project-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.1);
}
.project-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  display: block;
}
.project-card .card-body { padding: 1rem 1.1rem 1.2rem; }
.project-card .card-title {
  font-family: var(--font-slab);
  font-size: 1.15rem;
  margin: 0 0 0.4rem;
}
.project-card .card-title a { color: var(--text); }
.project-card .card-title a:hover { color: var(--accent); }
.project-card .card-text {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin: 0;
}

/* --------------------------------------------------------- publications --- */
.publications h2.year {
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.3rem;
  margin-top: 2.2rem;
}
.pub-list { list-style: none; padding: 0; }
.pub-list li { margin-bottom: 1.3rem; }
.pub-title { font-weight: 500; color: var(--text); }
.pub-authors { font-size: 0.95rem; }
.pub-venue { color: var(--text-muted); font-style: italic; font-size: 0.95rem; }
.pub-links { font-size: 0.85rem; margin-top: 0.2rem; }
.pub-links a {
  display: inline-block;
  border: 1px solid var(--accent);
  border-radius: 4px;
  padding: 0.02rem 0.45rem;
  margin-right: 0.3rem;
}
.author-self { font-weight: 700; }

/* ------------------------------------------------------------- blog list --- */
.post-list { list-style: none; padding: 0; }
.post-list > li {
  margin-bottom: 2rem;
  padding-bottom: 1.2rem;
  border-bottom: 1px solid var(--border);
}
.post-list h3 { margin: 0 0 0.3rem; }
.post-list .post-link { font-size: 1.4rem; }
.pagination {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 2rem;
}

/* ------------------------------------------------------------- cv / pdf --- */
.pdf-embed {
  width: 100%;
  height: 80vh;
  border: 1px solid var(--border);
  border-radius: 6px;
  margin-top: 1rem;
}
.btn-download {
  display: inline-block;
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: 5px;
  padding: 0.4rem 1rem;
  font-size: 0.95rem;
}
.btn-download:hover { background: var(--accent); color: #fff; }

/* ----------------------------------------------------------------- footer --- */
.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 3rem;
  padding: 1.5rem 0;
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}
.footer-inner a { color: var(--text-muted); text-decoration: underline; }
.footer-inner a:hover { color: var(--accent); }

/* ------------------------------------------------------------ responsive --- */
@media (max-width: 700px) {
  .nav-toggle-label { display: block; }
  .nav-links {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    flex-direction: column;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
  }
  .nav-toggle:checked ~ .nav-links { max-height: 360px; }
  .nav-links li { padding: 0.6rem 20px; border-top: 1px solid var(--border); }

  .post-title { font-size: 2rem; }
  .profile.float-right,
  .profile.float-left {
    float: none;
    width: 70%;
    max-width: 280px;
    margin: 0 auto 1.5rem;
  }
}