/* ── CSS Custom Properties ── */
:root {
  --bg:         #161210;
  --surface:    #211a13;
  --surface2:   #2e2318;
  --border:     #7a5c18;
  --text:       #e8d5b0;
  --text-muted: #9a7e56;
  --accent:     #c89030;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Body ── */
body {
  background: var(--bg);
  color: var(--text);
  font-family: Georgia, 'Times New Roman', serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Header ── */
header {
  background: var(--surface);
  border-bottom: 2px solid var(--border);
  padding: 14px 24px;
  display: flex;
  align-items: baseline;
  gap: 16px;
  flex-shrink: 0;
}
header h1 { font-size: 1.5rem; color: var(--accent); letter-spacing: 0.06em; }
header p  { color: var(--text-muted); font-size: 0.85rem; font-style: italic; }

/* ── Body layout ── */
.layout { display: flex; flex: 1; overflow: hidden; }

/* ── Sidebar ── */
aside {
  width: 0; min-width: 0;
  background: var(--surface);
  border-right: 0px solid var(--border);
  overflow: hidden; flex-shrink: 0;
  transition: width 0.25s ease, min-width 0.25s ease, border-width 0.25s ease;
}
.aside-header {
  display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px;
}
aside h2 { color: var(--accent); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.12em; }
.aside-close {
  background: none; border: none; color: var(--text-muted); cursor: pointer;
  font-size: 1.2rem; line-height: 1; padding: 0 2px; transition: color 0.15s;
}
.aside-close:hover { color: var(--text); }

.sidebar-toggle-btn {
  margin-left: auto;
  background: var(--surface2); border: 1px solid var(--border);
  color: var(--text-muted); cursor: pointer; font-family: inherit;
  font-size: 0.8rem; padding: 5px 12px; border-radius: 4px;
  display: flex; align-items: center; gap: 5px; white-space: nowrap;
  transition: color 0.15s, border-color 0.15s;
}
.sidebar-toggle-btn:hover { color: var(--text); border-color: var(--text-muted); }

.sidebar-overlay {
  display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.6); z-index: 99;
}
@media (max-width: 640px) {
  .sidebar-overlay.active { display: block; }
  #sidebar { position: fixed; top: 0; left: 0; height: 100%; z-index: 100; }
  .aside-inner { height: 100%; overflow-y: auto; }
}

/* ── Condition cards ── */
.ccard { border-radius: 5px; padding: 10px 12px; margin-bottom: 9px; border: 1px solid; }
.ccard h3 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.07em; margin-bottom: 5px; }
.ccard p  { font-size: 0.76rem; line-height: 1.55; color: var(--text); }
.ccard .tag {
  display: inline-block; margin-top: 6px;
  font-size: 0.72rem; font-weight: bold; padding: 2px 7px; border-radius: 3px;
}

/* ── Main ── */
main { flex: 1; overflow: auto; padding: 20px 24px; }

/* ── Tabs ── */
.tab-bar { display: flex; gap: 6px; margin-bottom: 0; }
.tab-btn {
  padding: 8px 22px; background: var(--surface2);
  border: 1px solid var(--border); border-bottom-color: var(--border);
  color: var(--text-muted); cursor: pointer; font-family: inherit;
  font-size: 0.9rem; border-radius: 6px 6px 0 0;
  transition: color 0.15s, background 0.15s;
}
.tab-btn.active {
  background: var(--surface); color: var(--accent);
  border-color: var(--accent); border-bottom-color: var(--surface);
  position: relative; z-index: 1;
}
.tab-btn:hover:not(.active) { color: var(--text); }

.tab-panel {
  display: none; background: var(--surface);
  border: 1px solid var(--accent); border-radius: 0 6px 6px 6px; padding: 24px;
}
.tab-panel.active { display: block; }
.tab-panel h2 { color: var(--accent); font-size: 1.1rem; margin-bottom: 6px; }
.tab-panel .subtitle { color: var(--text-muted); font-size: 0.82rem; font-style: italic; margin-bottom: 22px; }

/* ── Diagram ── */
.diagram-wrap { overflow-x: auto; padding: 10px 0; }
.diagram-wrap .mermaid { display: flex; justify-content: center; }

/* ── Legend ── */
.legend { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 18px; font-size: 0.77rem; }
.legend-item { display: flex; align-items: center; gap: 6px; }
.legend-dot { width: 13px; height: 13px; border-radius: 50%; border: 1px solid; flex-shrink: 0; }

/* ── Note box ── */
.note-box {
  background: var(--surface2); border: 1px solid var(--border); border-radius: 5px;
  padding: 12px 16px; margin-top: 20px; font-size: 0.8rem; line-height: 1.7; color: var(--text);
}
.note-box h3 {
  color: var(--accent); font-size: 0.78rem; text-transform: uppercase;
  letter-spacing: 0.1em; margin-bottom: 8px;
}
.note-box ul { padding-left: 16px; }
.note-box li { margin-bottom: 4px; }
.note-box strong { color: var(--accent); }

/* ── Simulator shared ── */
.sim-start-label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); }

.sim-chip {
  padding: 5px 14px; border-radius: 20px; border: 1px solid;
  background: transparent; cursor: pointer; font-family: inherit;
  font-size: 0.78rem; font-weight: bold; letter-spacing: 0.05em; transition: opacity 0.15s;
}
.sim-chip:hover { opacity: 0.7; }

.sim-box {
  border-radius: 7px; border: 2px solid; padding: 18px 22px; margin-bottom: 22px;
  transition: background 0.25s, border-color 0.25s;
}
.sim-box-label { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--text-muted); margin-bottom: 4px; }
.sim-state-name { font-size: 1.7rem; font-weight: bold; letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 6px; }
.sim-state-effects { font-size: 0.8rem; color: var(--text); line-height: 1.6; }

.sim-section-head { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-muted); margin-bottom: 10px; }
.sim-actions-list { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; }
.sim-action:hover { border-color: var(--accent); color: var(--accent); }
.sim-action.selected { border-color: var(--accent); background: #1e1608; color: var(--accent); }
.sim-action-name { font-weight: bold; margin-bottom: 3px; }
.sim-action-hint { font-size: 0.7rem; color: var(--text-muted); }
.sim-action.selected .sim-action-hint { color: #906c38; }

.sim-outcomes-box {
  background: var(--surface2); border: 1px solid var(--border); border-radius: 6px;
  padding: 14px 18px; margin-bottom: 22px;
}
.sim-outcomes-head { font-size: 0.78rem; color: var(--text-muted); margin-bottom: 10px; }
.sim-outcome:hover { border-color: var(--accent); color: var(--accent); }

.sim-result-box {
  border-radius: 6px; border: 1px solid; padding: 14px 18px; margin-bottom: 22px;
  animation: simFadeIn 0.25s ease;
}
@keyframes simFadeIn {
  from { opacity: 0; transform: translateY(5px); }
  to   { opacity: 1; transform: translateY(0); }
}
.sim-result-top { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.sim-result-new-state { font-size: 1.05rem; font-weight: bold; text-transform: uppercase; letter-spacing: 0.06em; }
.sim-result-msg { font-size: 0.8rem; color: var(--text); line-height: 1.6; }

.sim-bottom-row {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 16px; flex-wrap: wrap; margin-top: 4px;
}
.sim-history-wrap { flex: 1; min-width: 0; }
.sim-history-label { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-muted); margin-bottom: 6px; }
.sim-history-trail { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; font-size: 0.78rem; min-height: 1.4em; }
.sim-hist-state { font-weight: bold; }
.sim-hist-via { color: var(--text-muted); font-size: 0.7rem; font-style: italic; }

.sim-reset-btn {
  padding: 7px 18px; background: var(--surface2); border: 1px solid var(--border);
  color: var(--text-muted); border-radius: 4px; cursor: pointer; font-family: inherit;
  font-size: 0.8rem; white-space: nowrap; transition: color 0.15s, border-color 0.15s;
}
.sim-reset-btn:hover { color: var(--text); border-color: var(--text-muted); }