/* ============================================================
   MFS — My Favorite Spacetimes
   Custom layout CSS — uses palette.css variables only
   ============================================================ */

/* ── Reset / base ── */
*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0;
  font-family: 'EB Garamond', Georgia, serif;
  color: var(--text-bright);
  background: transparent;
  overflow-x: hidden;
}

/* ── Panels container (desktop: fixed left strip) ── */
#mfs-panels {
  position: fixed;
  top: 0;
  left: 0;
  width: 22%;
  height: 100vh;
  z-index: 10;
  display: flex;
  flex-direction: column;
  pointer-events: none; /* let canvas show through gaps */
}

/* ── Main panel ── */
#mfs-panel-main {
  pointer-events: all;
  background: rgba(13, 13, 13, 0.55);
  backdrop-filter: blur(4px);
  border-right: 1px solid var(--border-dark);
  border-bottom: 1px solid var(--border-dark);
  padding: 1.2em 1em 1em 1em;
  display: flex;
  flex-direction: column;
  gap: 0.75em;
}

/* ── Sub-panel ── */
#mfs-panel-sub {
  pointer-events: all;
  background: rgba(13, 13, 13, 0.45);
  backdrop-filter: blur(4px);
  border-right: 1px solid var(--border-dark);
  border-bottom: 1px solid var(--border-dark);
  padding: 0.8em 1em;
  display: flex;
  flex-direction: column;
  gap: 0.5em;
}

#mfs-panel-sub.hidden {
  display: none;
}

/* ── Search input ── */
#mfs-search {
  width: 100%;
  background: var(--bg-control);
  border: 1px solid var(--border-mid);
  border-radius: 4px;
  color: var(--text-bright);
  padding: 0.4em 0.6em;
  font-family: inherit;
  font-size: 0.85em;
  outline: none;
  transition: border-color 0.2s;
}

#mfs-search:focus {
  border-color: var(--teal-dark);
}

#mfs-search::placeholder {
  color: var(--text-dim);
}

#mfs-search-results {
  font-size: 0.8em;
  color: var(--text-dim);
  overflow-y: auto;
}

/* ── Nav buttons ── */
#mfs-nav, #mfs-metric-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3em;
}

.mfs-nav-btn {
  background: var(--bg-control);
  border: 1px solid var(--border-mid);
  border-radius: 3px;
  color: var(--text-dim);
  padding: 0.3em 0.6em;
  font-family: 'Pump', Georgia, serif;
  font-size: 0.75em;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.mfs-nav-btn:hover {
  background: var(--bg-hover);
  color: var(--text-bright);
  border-color: var(--teal-dark);
}

.mfs-nav-btn.active {
  background: var(--bg-active-teal);
  color: var(--teal-light);
  border-color: var(--teal-dark);
}

/* ── Browse area ── */
#mfs-browse {
  font-size: 0.8em;
  color: var(--text-dim);
  overflow-y: auto;
  flex: 1;
}

/* ── Coordinate selector ── */
#mfs-coord-select {
  font-size: 0.8em;
  color: var(--text-dim);
}

/* ── Main content area (desktop: offset from left panel) ── */
#mfs-content {
  position: relative;
  z-index: 5;
  margin-left: 24%;
  padding: 2em 2.5em 2em 1.5em;
  min-height: 100vh;
  color: var(--text-bright);
}

/* ── Mobile toggle button (hidden on desktop) ── */
#mfs-mobile-toggle {
  display: none;
}

/* ── MFS page title ── */
#mfs-content h1 {
  font-family: 'Pump', sans-serif;
  font-size: 2em;
  background: linear-gradient(90deg, var(--teal-light), var(--pink-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(1px 1px 0px rgba(0,0,0,0.9));
  margin-top: 0.5em;
}

/* ── Metric content sections ── */
.mfs-section {
  margin-bottom: 2em;
}

.mfs-section h2 {
  font-family: 'Pump', sans-serif;
  font-size: 1.1em;
  color: var(--teal-light);
  border-bottom: 1px solid var(--border-dark);
  padding-bottom: 0.3em;
  margin-bottom: 0.75em;
}

/* ── Math display ── */
.mfs-math {
  overflow-x: auto;
  padding: 0.5em 0;
  color: var(--text-bright);
}

/* ════════════════════════════════════════════════
   MOBILE LAYOUT
   ════════════════════════════════════════════════ */
html.is-mobile #mfs-panels {
  position: relative;
  width: 100%;
  height: auto;
  flex-direction: column;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

html.is-mobile #mfs-panels.open {
  max-height: 600px;
}

html.is-mobile #mfs-panel-main,
html.is-mobile #mfs-panel-sub {
  border-right: none;
  border-bottom: 1px solid var(--border-dark);
  width: 100%;
}

html.is-mobile #mfs-content {
  margin-left: 0;
  padding: 1em;
}

html.is-mobile #mfs-mobile-toggle {
  display: block;
  position: fixed;
  top: 0.75em;
  left: 0.75em;
  z-index: 20;
  background: var(--bg-control);
  border: 1px solid var(--border-mid);
  border-radius: 4px;
  color: var(--pink-light);
  font-family: 'Pump', sans-serif;
  font-size: 0.8em;
  padding: 0.3em 0.7em;
  cursor: pointer;
}

/* ── MFS overlay elements — override global font rules ── */
#mfs-title, #mfs-exit, #mfs-exit:visited, #mfs-exit:link {
  font-family: 'Source Code Pro', monospace !important;
}