:root {
  --ink: #2b2620;
  --ink-soft: #5c5346;
  --paper: #faf6ef;
  --paper-raised: #ffffff;
  --line: #e2d9c8;
  --accent: #2f5d5a;
  --accent-dark: #204442;
  --accent-soft: #e6efee;
  --gold: #b8893e;
  --danger: #a5402f;
  --danger-soft: #f7e6e2;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(43, 38, 32, 0.08), 0 4px 14px rgba(43, 38, 32, 0.06);
  font-family: 'Georgia', 'Charter', 'Iowan Old Style', serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

h1, h2 { font-family: 'Georgia', serif; color: var(--accent-dark); margin: 0 0 .5rem; }

.muted { color: var(--ink-soft); font-size: 0.9rem; }

.hidden { display: none !important; }

/* --- Auth pages --- */
.auth-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1rem;
}
.auth-card {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem;
  width: 100%;
  max-width: 380px;
}
.auth-card h1 { font-size: 1.4rem; }
.auth-card form { display: flex; flex-direction: column; gap: .9rem; margin-top: 1rem; }
.auth-card label { display: flex; flex-direction: column; gap: .3rem; font-size: .9rem; color: var(--ink-soft); }

input, select, textarea {
  font: inherit;
  padding: .55rem .65rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  color: var(--ink);
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.btn {
  cursor: pointer;
  border: none;
  border-radius: 6px;
  padding: .6rem 1rem;
  font-weight: 600;
  font-size: .9rem;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-ghost { background: transparent; color: var(--accent-dark); border: 1px solid var(--line); }
.btn-ghost:hover { background: var(--accent-soft); }

.alert { padding: .6rem .8rem; border-radius: 6px; font-size: .88rem; margin-bottom: .5rem; }
.alert-error { background: var(--danger-soft); color: var(--danger); }
.alert-ok { background: var(--accent-soft); color: var(--accent-dark); }

/* --- App shell --- */
.app-page { display: flex; flex-direction: column; height: 100vh; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .7rem 1.2rem;
  background: var(--accent-dark);
  color: #fff;
  flex-shrink: 0;
}
.topbar .brand { font-family: 'Georgia', serif; font-size: 1.15rem; letter-spacing: .02em; }
.topbar-right { display: flex; align-items: center; gap: .9rem; }
.topbar .muted { color: #cfe0de; }
.topbar .btn-ghost { color: #fff; border-color: rgba(255,255,255,.35); }
.topbar .btn-ghost:hover { background: rgba(255,255,255,.12); }

.layout { display: grid; grid-template-columns: 280px 1fr; flex: 1; min-height: 0; }

.sidebar {
  border-right: 1px solid var(--line);
  padding: 1rem;
  overflow-y: auto;
  background: var(--paper-raised);
}
.sidebar-section { margin-bottom: 1.6rem; }
.sidebar-section h2 { font-size: 1rem; margin-bottom: .6rem; }
#upload-form { display: flex; flex-direction: column; gap: .5rem; }
#upload-status { margin-top: .4rem; min-height: 1.2em; }

.tree-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: .3rem; }
.tree-list li {
  padding: 0;
  border-radius: 6px;
  border: 1px solid transparent;
  font-size: .9rem;
}
.tree-list li:hover { background: var(--accent-soft); }
.tree-list li.active { background: var(--accent-soft); border-color: var(--accent); }
.tree-item-row { display: flex; align-items: center; justify-content: space-between; gap: .4rem; padding: .5rem .6rem; }
.tree-item-name { cursor: pointer; flex: 1; min-width: 0; font-weight: 600; }
.tree-list li.active .tree-item-name { font-weight: 700; }
.tree-item-date { display: block; font-size: .75rem; color: var(--ink-soft); font-weight: 400; }
.tree-delete-btn {
  flex-shrink: 0;
  border: none;
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  font-size: .85rem;
  padding: .2rem .4rem;
  border-radius: 4px;
}
.tree-delete-btn:hover { background: var(--danger-soft); color: var(--danger); }

.content { padding: 1.5rem; overflow-y: auto; }

.empty-state { color: var(--ink-soft); padding: 3rem 1rem; text-align: center; }

.tree-view-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.2rem; }

.lineage-controls {
  display: flex;
  align-items: flex-end;
  gap: 1.4rem;
  margin-bottom: 1.1rem;
  flex-wrap: wrap;
}
.lineage-controls label { display: flex; flex-direction: column; gap: .3rem; font-size: .85rem; color: var(--ink-soft); }
.lineage-controls .checkbox-label { flex-direction: row; align-items: center; gap: .4rem; font-size: .88rem; }
.lineage-controls select { min-width: 260px; }

.person-card.is-ancestor { border-color: var(--gold); border-width: 2px; background: #fff8ec; }
.person-card.is-collateral { opacity: .55; }
.person-card.is-root { border-color: var(--accent); border-width: 2px; }
.ancestor-tag {
  display: inline-block;
  font-size: .68rem;
  padding: .05rem .35rem;
  border-radius: 4px;
  margin-left: .3rem;
  background: var(--gold);
  color: #fff;
}

.generation-group {
  margin-bottom: 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-raised);
  overflow: hidden;
}
.generation-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .7rem 1rem;
  cursor: pointer;
  background: var(--accent-soft);
}
.generation-header h3 { margin: 0; font-size: .95rem; color: var(--accent-dark); }
.generation-count { color: var(--ink-soft); font-size: .82rem; }
.generation-body { padding: .4rem 1rem 1rem; display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: .5rem; }
.generation-body.collapsed { display: none; }

.person-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: .6rem .7rem;
  cursor: pointer;
  background: var(--paper);
}
.person-card:hover { border-color: var(--accent); }
.person-card .name { font-weight: 600; }
.person-card .dates { font-size: .8rem; color: var(--ink-soft); }
.person-card .sex-tag {
  display: inline-block;
  font-size: .7rem;
  padding: .05rem .35rem;
  border-radius: 4px;
  margin-left: .3rem;
  color: #fff;
}
.sex-tag.M { background: var(--accent); }
.sex-tag.F { background: var(--gold); }

/* --- Person panel --- */
.person-panel {
  width: 340px;
  border-left: 1px solid var(--line);
  background: var(--paper-raised);
  padding: 1.2rem;
  overflow-y: auto;
  position: relative;
}
.person-panel-close { position: absolute; top: .8rem; right: .8rem; }
#person-form { display: flex; flex-direction: column; gap: .8rem; margin-top: .8rem; }
#person-form label { display: flex; flex-direction: column; gap: .25rem; font-size: .85rem; color: var(--ink-soft); }
#person-form fieldset { border: 1px solid var(--line); border-radius: 8px; padding: .6rem .7rem; display: flex; flex-direction: column; gap: .5rem; }
#person-form legend { font-size: .8rem; color: var(--accent-dark); padding: 0 .3rem; }
#person-save-status { min-height: 1.2em; }

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { border-right: none; border-bottom: 1px solid var(--line); }
  .person-panel { position: fixed; right: 0; top: 0; bottom: 0; z-index: 20; box-shadow: var(--shadow); }
}