/* ============================================================
   Urban Soil Biophysics — styles.css
   Palette: #30364f · #acbac4 · #e1d9bc · #f0f0db
   Font: IBM Plex Sans throughout (sans-serif)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:ital,wght@0,300;0,400;0,500;0,600;1,300;1,400&display=swap');

:root {
  --c-dark:    #30364f;
  --c-mid:     #acbac4;
  --c-warm:    #e1d9bc;
  --c-cream:   #f0f0db;
  --c-white:   #ffffff;
  --c-text:    #1e2230;
  --c-muted:   #6b7280;
  --c-visited: #7a8099;
}

/* ---- Base ---- */
body {
  font-family: 'IBM Plex Sans', sans-serif;
  font-weight: 300;
  font-size: 1rem;
  color: var(--c-text);
  background: var(--c-white);
  line-height: 1.75;
}

h1, h2, h3, h4 {
  font-family: 'IBM Plex Sans', sans-serif;
  font-weight: 500;
  color: var(--c-dark);
  line-height: 1.3;
}

h1 { font-size: 2.2rem; font-weight: 600; }
h2 {
  font-size: 1.35rem;
  font-weight: 500;
  margin-top: 2.5rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--c-mid);
}
h3 { font-size: 1.05rem; font-weight: 500; }

a         { color: var(--c-dark); text-decoration: underline; text-underline-offset: 2px; }
a:hover   { color: #5a6380; }
a:visited { color: var(--c-visited); }

p { margin-bottom: 1rem; }

/* ---- Navbar ---- */
.navbar { background-color: var(--c-dark) !important; border-bottom: none; }
.navbar-brand, .navbar-nav .nav-link {
  color: var(--c-cream) !important;
  font-family: 'IBM Plex Sans', sans-serif;
  font-weight: 400;
  font-size: 0.92rem;
  letter-spacing: 0.01em;
}
.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active { color: #ffffff !important; }
.navbar a:visited { color: var(--c-cream) !important; }

/* ---- Footer ---- */
.nav-footer {
  background-color: var(--c-cream) !important;
  border-top: 1px solid var(--c-mid);
  color: var(--c-muted) !important;
  font-size: 0.87rem;
}
.nav-footer a         { color: var(--c-dark); }
.nav-footer a:visited { color: var(--c-visited); }

/* ---- Main content ---- */
#quarto-content main {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

/* ---- Hero ---- */
.home-hero {
  background-color: var(--c-dark);
  color: var(--c-cream);
  padding: 4.5rem 2rem;
  width: 100%;
}
.hero-content { max-width: 800px; margin: 0 auto; }
.home-hero h1 { font-size: 2.6rem; font-weight: 600; color: #ffffff; margin-bottom: 1.2rem; }
.home-hero p  { font-size: 1.05rem; font-weight: 300; color: var(--c-mid); max-width: 620px; }
.home-hero a,
.home-hero a:visited  { color: #ffffff !important; text-decoration: underline; text-underline-offset: 2px; text-decoration-color: var(--c-mid); }
.home-hero a:hover    { color: var(--c-cream) !important; text-decoration-color: var(--c-cream); }

/* ---- Home sections ---- */
.home-section {
  max-width: 900px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}
.section-muted {
  background: var(--c-cream);
  border-top: 1px solid var(--c-mid);
  border-bottom: 1px solid var(--c-mid);
  padding: 3rem 2rem;
  max-width: 100%;
  width: 100%;
}
.section-muted > * { max-width: 900px; margin-left: auto; margin-right: auto; }

/* ---- Focus grid (photo cards) ---- */
.focus-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.2rem;
  margin-top: 1.5rem;
}

.focus-card {
  background: var(--c-white);
  border: 1px solid var(--c-mid);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* Photo fills the top of the card */
.focus-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  display: block;
  margin: 0 !important;
}

/* Fallback placeholder when image is missing */
.focus-card img[src=""],
.focus-card img:not([src]) {
  background: var(--c-warm);
  min-height: 180px;
}

/* Title and description below image */
.focus-card-body {
  padding: 0.9rem 1rem 1rem;
}
.focus-card-body h3 {
  font-size: 0.95rem;
  font-weight: 500;
  margin: 0 0 0.4rem;
  color: var(--c-dark);
}
.focus-card-body p {
  font-size: 0.85rem;
  color: var(--c-muted);
  margin: 0;
  line-height: 1.5;
}

/* ---- Buttons ---- */
.btn-primary-usb {
  display: inline-block;
  background: transparent;
  color: var(--c-cream) !important;
  padding: 0.5rem 1.3rem;
  border: 1px solid var(--c-cream);
  font-weight: 400;
  font-size: 0.92rem;
  text-decoration: none !important;
  transition: all 0.15s;
}
.btn-primary-usb:hover   { background: var(--c-cream); color: var(--c-dark) !important; }
.btn-primary-usb:visited { color: var(--c-cream) !important; }

.btn-secondary-usb {
  display: inline-block;
  background: var(--c-dark);
  color: var(--c-cream) !important;
  padding: 0.5rem 1.3rem;
  border: 1px solid var(--c-dark);
  font-size: 0.92rem;
  text-decoration: none !important;
  transition: all 0.15s;
}
.btn-secondary-usb:hover   { background: #464e6e; border-color: #464e6e; color: #ffffff !important; }
.btn-secondary-usb:visited { color: var(--c-cream) !important; }

/* ---- People ---- */
.person-card {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  margin-bottom: 2rem;
  padding: 1.8rem;
  background: var(--c-white);
  border: 1px solid var(--c-mid);
  border-left: 4px solid var(--c-dark);
}
.person-img {
  width: 120px;
  height: 120px;
  min-width: 120px;
  min-height: 120px;
  object-fit: cover;
  object-position: center top;
  border-radius: 50%;
  flex-shrink: 0;
  border: 2px solid var(--c-mid);
  display: block;
}
.person-info h3 { margin-top: 0; }

.people-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}
.person-card-sm {
  padding: 1.1rem 1.3rem;
  border: 1px solid var(--c-mid);
  background: var(--c-white);
}
.person-card-sm h3 { font-size: 0.97rem; margin-top: 0; margin-bottom: 0.25rem; }
.person-card-sm p  { font-size: 0.85rem; color: var(--c-muted); margin: 0; }

/* ---- Projects ---- */
.project-card {
  margin-bottom: 1.8rem;
  padding: 1.6rem;
  background: var(--c-white);
  border: 1px solid var(--c-mid);
  border-left: 4px solid var(--c-dark);
}
.project-card h3 { margin-top: 0; }

/* ---- Publications ---- */
.pub-note {
  font-size: 0.88rem;
  color: var(--c-muted);
  background: var(--c-cream);
  padding: 0.7rem 1rem;
  margin-bottom: 1.5rem;
  border-left: 3px solid var(--c-mid);
}
.pub-entry {
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--c-warm);
  font-size: 0.93rem;
  line-height: 1.65;
}
.pub-entry:last-child { border-bottom: none; }
.pub-doi         { font-size: 0.82rem; color: var(--c-muted) !important; text-decoration: none !important; }
.pub-doi:hover   { color: var(--c-dark) !important; }
.pub-doi:visited { color: var(--c-visited) !important; }

/* ---- Outreach ---- */
.outreach-card {
  margin-bottom: 1.4rem;
  padding: 1.3rem 1.5rem;
  border: 1px solid var(--c-mid);
  background: var(--c-white);
}

/* ---- Tables ---- */
table { width: 100%; border-collapse: collapse; font-size: 0.92rem; margin: 1rem 0; }
th { background: var(--c-dark); color: var(--c-cream); padding: 0.55rem 1rem; text-align: left; font-weight: 400; }
td { padding: 0.5rem 1rem; border-bottom: 1px solid var(--c-warm); }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--c-cream); }

/* ---- Callouts ---- */
.callout { border-left-color: var(--c-mid) !important; }

/* ---- Responsive ---- */
@media (max-width: 640px) {
  .person-card { flex-direction: column; gap: 1rem; }
  .home-hero h1 { font-size: 1.9rem; }
  .focus-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 420px) {
  .focus-grid { grid-template-columns: 1fr; }
}