:root {
  --bg: #f5f2e8;
  --panel: #ffffff;
  --ink: #2b2b2b;
  --muted: #6b6b6b;
  --accent: #2f7a3a;
  --accent-dark: #23582b;
  --wrong: #b0324b;
  --border: #d9d3c1;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}

header {
  background: var(--accent);
  color: white;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
}

header h1 {
  margin: 0;
  font-size: 1.25rem;
}

header nav a {
  color: white;
  text-decoration: none;
  margin-right: 1rem;
  opacity: 0.85;
}

header nav a:hover { opacity: 1; }

main {
  max-width: 1100px;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

h2 { margin-top: 0; }

.level-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.level-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem;
  text-decoration: none;
  color: inherit;
  transition: transform 0.1s ease, box-shadow 0.1s ease;
}

.level-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.level-card h3 { margin: 0 0 0.5rem 0; color: var(--accent-dark); }
.level-card p { margin: 0; color: var(--muted); font-size: 0.9rem; }

.prompt {
  font-size: 1.3rem;
  font-weight: 600;
  margin: 0 0 1.25rem 0;
}

.cat-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.6rem 0.9rem;
  margin: 0 0 1.25rem 0;
}

.cat-filter .cat-filter-label {
  font-size: 0.85rem;
  color: var(--muted);
  margin-right: 0.25rem;
}

.cat-filter label {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.9rem;
  cursor: pointer;
  user-select: none;
}

.cat-filter button {
  margin-left: auto;
  padding: 0.35rem 0.8rem;
  font-size: 0.85rem;
}

.cards {
  display: grid;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.cards.pair { grid-template-columns: 1fr 1fr; }
.cards.single { grid-template-columns: 1fr; max-width: 700px; }

.tree-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.75rem;
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.5rem;
}

.photo-grid figure {
  margin: 0;
  background: #eee;
  border-radius: 6px;
  overflow: hidden;
  position: relative;
}

.photo-grid img {
  width: 100%;
  height: 140px;
  object-fit: cover;
  display: block;
  cursor: zoom-in;
}

.photo-grid figcaption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0,0,0,0.55);
  color: white;
  font-size: 0.75rem;
  padding: 0.15rem 0.4rem;
}

.choices {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.choices button {
  padding: 0.7rem 1.1rem;
  font-size: 1rem;
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.1s;
}

.choices button:hover {
  background: #eef4e9;
  border-color: var(--accent);
}

.result {
  padding: 1.25rem;
  border-radius: 10px;
  margin-bottom: 1rem;
  background: var(--panel);
  border-left: 6px solid var(--accent);
}

.result.wrong { border-left-color: var(--wrong); }

.result h3 { margin: 0 0 0.5rem 0; }
.result .lat { color: var(--muted); font-style: italic; }

.btn {
  display: inline-block;
  background: var(--accent);
  color: white;
  padding: 0.6rem 1.1rem;
  border-radius: 8px;
  border: 0;
  cursor: pointer;
  text-decoration: none;
  font-size: 1rem;
}

.btn:hover { background: var(--accent-dark); }

.btn.secondary {
  background: transparent;
  color: var(--accent-dark);
  border: 1px solid var(--accent);
}

.manage-tree {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
  margin-bottom: 1rem;
}

.manage-tree summary {
  cursor: pointer;
  font-weight: 600;
}

.manage-tree .photo-slots {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.slot {
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 0.5rem;
  background: #fafaf6;
}

.slot img {
  width: 100%;
  height: 120px;
  object-fit: cover;
  border-radius: 4px;
  margin-bottom: 0.5rem;
}

.slot .placeholder {
  width: 100%;
  height: 120px;
  border-radius: 4px;
  background: #e8e4d4;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 0.8rem;
  margin-bottom: 0.5rem;
}

.slot form {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-top: 0.35rem;
}
.slot input[type=file] {
  width: 100%;
  min-width: 0;
  font-size: 0.75rem;
}
.slot button {
  width: 100%;
  padding: 0.35rem 0.6rem;
  font-size: 0.85rem;
  background: var(--accent);
  color: white;
  border: 0;
  border-radius: 6px;
  cursor: pointer;
}
.slot button:hover { background: var(--accent-dark); }

form.inline { display: inline; }

.new-tree-form {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
  margin-bottom: 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.new-tree-form label { display: flex; flex-direction: column; font-size: 0.85rem; color: var(--muted); }
.new-tree-form input[type=text] { padding: 0.5rem; border: 1px solid var(--border); border-radius: 6px; }
.new-tree-form .full { grid-column: 1 / -1; }

table.stats {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  border-radius: 10px;
  overflow: hidden;
}

table.stats th, table.stats td {
  border-bottom: 1px solid var(--border);
  padding: 0.5rem 0.75rem;
  text-align: left;
  font-size: 0.9rem;
}

table.stats th { background: #eef2e6; }

.bar {
  display: inline-block;
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(to right, var(--wrong), var(--accent));
  vertical-align: middle;
}

/* Survival profile — shown on the result page */
.survival {
  background: var(--panel);
  border: 1px solid var(--border);
  border-left: 6px solid #8a5a2b;
  border-radius: 10px;
  padding: 1rem 1.25rem;
  margin: 1rem 0;
}

.survival h3 {
  margin: 0 0 0.75rem 0;
  color: #6a4318;
}

.survival dl {
  display: grid;
  grid-template-columns: minmax(180px, 220px) 1fr;
  gap: 0.4rem 1rem;
  margin: 0;
}

.survival dt {
  font-weight: 600;
  color: var(--ink);
  padding-top: 0.15rem;
}

.survival dd {
  margin: 0;
  color: #333;
  white-space: pre-wrap;
}

@media (max-width: 640px) {
  .survival dl { grid-template-columns: 1fr; gap: 0.15rem 0; }
  .survival dt { padding-top: 0.5rem; }
}

/* Survival profile editor inside the manage page */
.survival-edit {
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--border);
  display: grid;
  gap: 0.5rem;
}

.survival-edit h4 {
  margin: 0.25rem 0 0.25rem 0;
  color: #6a4318;
}

.survival-edit label {
  display: flex;
  flex-direction: column;
  font-size: 0.85rem;
  color: var(--muted);
}

.survival-edit textarea {
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font: inherit;
  resize: vertical;
  min-height: 3.5em;
}

.survival-edit button { justify-self: start; margin-top: 0.25rem; }

/* Lightbox for photo zoom */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 999;
  cursor: zoom-out;
}
.lightbox.open { display: flex; }
.lightbox img { max-width: 95vw; max-height: 95vh; border-radius: 4px; }