/* -----------------------------
   Liverworts of Tasmania
   Complete style.css
   ----------------------------- */

/* --- Base colours and variables --- */
:root {
  --ink: #222;
  --paper: #faf9f7;
  --brand: #2e5c45;
  --muted: #e3e1da;
  --card: #ffffff;
  --ring: rgba(46, 92, 69, 0.25);
}

/* --- General resets --- */
* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Georgia, serif;
  line-height: 1.55;
}

/* --- Containers --- */
.container {
  padding: 2rem 1.25rem;
  max-width: 800px;
  margin: 0 auto;
}

/* --- Header --- */
.site-header {
  background: var(--brand);
  color: #fff;
  text-align: center;
  padding: 2.25rem 1.25rem;
}

.site-header h1 {
  margin: 0.1rem 0 0.4rem;
  font-size: 2rem;
  letter-spacing: 0.3px;
}

.site-header p {
  margin: 0;
  opacity: 0.95;
}

/* --- Footer --- */
.site-footer {
  background: var(--muted);
  text-align: center;
  padding: 1rem;
  font-size: 0.95rem;
}

/* --- Headings --- */
h2 {
  margin: 0 0 1rem;
  font-size: 1.5rem;
}

/* --- Taxonomy section --- */
#taxonomy-nav {
  text-align: center;
}

/* --- Taxonomy list --- */
.taxonomy-list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Taxonomy buttons --- */
.taxon-btn {
  width: 100%;
  text-align: left;
  padding: 1rem 1.25rem;
  font-size: 1.05rem;
  font-weight: 600;
  border: 1px solid #dcd9d1;
  border-radius: 14px;
  background: var(--card);
  color: var(--ink);
  cursor: not-allowed;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.04),
              0 6px 14px rgba(0, 0, 0, 0.03);
  transition: all 0.2s ease;
}

.taxon-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.04),
              0 10px 22px rgba(0, 0, 0, 0.05);
  border-color: #d0cdc4;
}

.taxon-btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px var(--ring);
  border-color: #c9c6bd;
}

/* --- Responsive adjustments --- */
@media (max-width: 640px) {
  .container {
    padding: 1.5rem;
  }
  
  .site-header h1 {
    font-size: 1.7rem;
  }

  h2 {
    font-size: 1.3rem;
  }

  .taxon-btn {
    font-size: 1rem;
    padding: 0.9rem 1rem;
  }
}

/* --- Top navigation bar under title --- */
.top-nav {
  margin-top: 1.2rem;
  display: flex;
  justify-content: center;
  gap: 1rem;
}

.nav-btn {
  display: inline-block;
  background: #ffffff;
  color: var(--brand);
  border: 1px solid #dcd9d1;
  border-radius: 8px;
  padding: 0.6rem 1.4rem;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: all 0.2s ease;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.nav-btn:hover {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 3px 8px rgba(0,0,0,0.08);
}

/* --- Tree: search and status --- */
.tree-search{
  display:flex;
  gap:.5rem;
  align-items:center;
  margin:.5rem 0 1rem;
}
.tree-search input{
  flex:1;
  padding:.6rem .8rem;
  border:1px solid #dcd9d1;
  border-radius:8px;
  background:#fff;
  font-size:1rem;
}
.tree-search button{
  padding:.55rem 1rem;
  border:1px solid #dcd9d1;
  border-radius:8px;
  background:#fff;
  font-weight:600;
  cursor:pointer;
  transition:all .15s ease;
}
.tree-search button:hover{
  background:var(--brand);
  color:#fff;
}

.tree-status{
  font-size:.95rem;
  color:#444;
  opacity:.85;
  margin-bottom:.5rem;
}

/* --- Tree visuals --- */
.tree details{
  border:1px solid #dcd9d1;
  background:#fff;
  border-radius:12px;
  padding:.6rem .9rem;
  margin:.5rem 0;
  box-shadow:0 1px 0 rgba(0,0,0,.04), 0 6px 14px rgba(0,0,0,.03);
}

.tree summary{
  cursor:pointer;
  font-weight:700;
  list-style:none;
}

.tree summary::-webkit-details-marker{ display:none; }
.tree summary::before{
  content:"▸";
  display:inline-block;
  width:1rem;
  margin-right:.3rem;
  transform:translateY(-1px) rotate(0deg);
  transition:transform .15s ease;
  opacity:.8;
}
.tree details[open] > summary::before{
  transform:translateY(-1px) rotate(90deg);
}

.species-list{
  margin:.4rem 0 .2rem 1.4rem;
  padding-left:1rem;
}
.species-list li{
  padding:.12rem 0;
}