:root {
  color-scheme: light;
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background-color: #f6f8fb;
  color: var(--lcars-ink);
  --primary: #c1121f; /* Star Trek command red */
  --primary-strong: #8b0f18;
  --primary-contrast: #ffffff;
  --page-margin: 12px; /* Margin around the full-screen graph */
  --overlay-bg: rgba(255, 255, 255, 0.80);
  --overlay-border: rgba(148, 163, 184, 0.45);
  --overlay-shadow: 0 10px 28px rgba(15, 23, 42, 0.25);
  /* LCARS palette (light theme) */
  --lcars-amber: #F3A536;
  --lcars-peach: #F5C1A9;
  --lcars-lilac: #B68AD9;
  --lcars-gold: #FFD27E;
  --lcars-sand: #E6B98A;
  --lcars-ink: #0b1220;
  --header-bg: linear-gradient(135deg, var(--lcars-amber), var(--lcars-peach));
  --footer-bg: linear-gradient(135deg, rgba(255,255,255,0.72), rgba(248,250,252,0.58));
}

html, body { height: 100%; }

body {
  margin: 0;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* Floating header container */
header {
  position: fixed;
  top: var(--page-margin);
  left: var(--page-margin);
  right: auto;
  z-index: 30;
  padding: 0.25rem 0.25rem 0.5rem;
  background: transparent;
  color: var(--lcars-ink);
  border: none;
  width: min(880px, 70vw);
}

/* LCARS Title Bar */
.lcars-titlebar {
  position: relative;
  width: 100%;
  height: 56px;
  background: var(--lcars-amber);
  border-radius: 28px;
  border: 1px solid rgba(0,0,0,0.6);
  box-shadow: none;
  z-index: 31;
}
.lcars-left-cap { position: absolute; left: 4px; top: 4px; bottom: 4px; width: 78px; background: var(--lcars-amber); border-radius: 22px; }
.lcars-divider { position: absolute; left: 222px; top: 6px; bottom: 6px; width: 12px; background: #ffffff; border-radius: 4px; }
.lcars-right-label { position: absolute; left: 240px; right: auto; top: 0; bottom: 0; display: inline-flex; align-items: center; padding: 0 20px; background: transparent; color: var(--lcars-lilac); border-radius: 0; box-shadow: none; border-left: 1px solid rgba(0,0,0,0.6); border-right: 1px solid rgba(0,0,0,0.6); border-top: none; border-bottom: none; width: max-content; max-width: calc(100% - 280px); overflow: hidden; z-index: 32; }
/* Simulated punch-through: cover the orange bar under the title area only */
.lcars-right-label::before { content: ""; position: absolute; inset: 0; background: #ffffff; z-index: -1; }
/* Ensure the title text doesn't squish */
.lcars-right-label h1 { white-space: nowrap; }

header h1 { margin: 0; font-size: clamp(1.15rem, 2vw, 1.5rem); text-transform: uppercase; letter-spacing: 0.12em; color: inherit; }

.badge-beta {
  display: inline-block;
  margin-left: 0.6rem;
  padding: 0.15rem 0.5rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  border-radius: 999px;
  color: var(--lcars-ink);
  background: rgba(255,255,255,0.92);
  border: 1px solid rgba(148, 163, 184, 0.35);
}



/* Floating filters bar (LCARS style) */
#top-filter-bar {
  position: fixed;
  /* Align with Filters button stack */
  top: calc(var(--page-margin) + 0.25rem + 56px + 6px);
  /* Place to the right of the 240px pads, with a gap */
  left: calc(var(--page-margin) + 0.25rem + 240px + 12px);
  z-index: 25;
  color: var(--lcars-ink);
  background: linear-gradient(135deg, var(--lcars-peach), var(--lcars-lilac));
  box-shadow: var(--overlay-shadow);
  padding: 0.75rem 1.25rem 1rem;
  border: none;
  border-top-right-radius: 42px;
  border-bottom-right-radius: 42px;
  border-top-left-radius: 12px;
  border-bottom-left-radius: 12px;
  max-width: min(780px, 62vw);
  padding-left: 108px;
  opacity: 1; transform: translateY(0); transition: opacity 0.18s ease, transform 0.18s ease;
}
#top-filter-bar.is-collapsed { opacity: 0; transform: translateY(-6px); visibility: hidden; pointer-events: none; }
#top-filter-bar::before {
  content: "";
  position: absolute;
  top: 0; left: 0; bottom: 0;
  width: 88px;
  background: linear-gradient(180deg, var(--lcars-amber), var(--lcars-gold));
  border-top-left-radius: 12px;
  border-bottom-left-radius: 12px;
}

#top-filter-panel { margin-top: 0.75rem; }
#top-filter-panel.is-collapsed { display: none; }

/* Release Notes bar: same look as top-filter-bar, positioned at the second pad */
#release-notes-bar {
  position: fixed;
  top: calc(var(--page-margin) + 0.25rem + 56px + 6px + 48px + 6px);
  left: calc(var(--page-margin) + 0.25rem + 240px + 12px);
  z-index: 25;
  color: var(--lcars-ink);
  background: linear-gradient(135deg, var(--lcars-peach), var(--lcars-lilac));
  box-shadow: var(--overlay-shadow);
  padding: 0.75rem 1.25rem 1rem;
  border: none;
  border-top-right-radius: 42px;
  border-bottom-right-radius: 42px;
  border-top-left-radius: 12px;
  border-bottom-left-radius: 12px;
  max-width: min(780px, 62vw);
  padding-left: 108px;
  opacity: 1; transform: translateY(0); transition: opacity 0.18s ease, transform 0.18s ease;
}
#release-notes-bar::before {
  content: "";
  position: absolute;
  top: 0; left: 0; bottom: 0;
  width: 88px;
  background: linear-gradient(180deg, var(--lcars-amber), var(--lcars-gold));
  border-top-left-radius: 12px;
  border-bottom-left-radius: 12px;
}
#release-notes-bar.is-collapsed { opacity: 0; transform: translateY(-6px); visibility: hidden; pointer-events: none; }
#release-notes-panel { margin-top: 0.75rem; }
.rn-content { padding: 1rem 1.25rem; background: linear-gradient(140deg, rgba(254, 202, 202, 0.55), rgba(254, 226, 226, 0.4)); border-radius: 12px; border: 1px solid rgba(148, 163, 184, 0.4); white-space: pre-wrap; }
.rn-content h1, .rn-content h2, .rn-content h3 { color: var(--primary); }
.rn-grid { display: grid; grid-template-columns: 1fr; gap: 0.75rem 1rem; }

.filters-row { display: flex; gap: 1rem; flex-wrap: wrap; }

main {
  flex: 1;
  position: relative;
  min-height: 0;
  overflow: hidden;
}

#graph-container {
  position: fixed;
  top: var(--page-margin);
  left: var(--page-margin);
  right: var(--page-margin);
  bottom: var(--page-margin);
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.12);
  overflow: hidden;
  min-height: 0;
  z-index: 1;
}

#splitter { display: none; }

svg { width: 100%; height: 100%; min-height: inherit; touch-action: none; }

.zoom-controls {
  position: absolute;
  bottom: 12px;
  left: 12px;
  display: flex;
  gap: 8px;
  padding: 6px;
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.35);
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(6px);
  box-shadow: 0 6px 16px rgba(15, 23, 42, 0.15);
  z-index: 2;
}
.zoom-controls button {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: #ffffff;
  color: var(--lcars-ink);
  cursor: pointer;
  font-weight: 600;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.zoom-controls button:hover { transform: translateY(-1px); box-shadow: 0 6px 12px rgba(15, 23, 42, 0.18); background: #f8fafc; }

.node-title-label text { fill: var(--lcars-ink); font-size: 0.75rem; font-weight: 500; }
.node-title-label rect { fill: rgba(255, 255, 255, 0.96); stroke: rgba(15, 23, 42, 0.12); stroke-width: 1; rx: 10; ry: 10; filter: drop-shadow(0 4px 10px rgba(15, 23, 42, 0.12)); }

/* Floating, draggable data panel (LCARS style) */
#node-info {
  position: fixed;
  top: 100px;
  right: calc(var(--page-margin) + 6px);
  z-index: 40;
  width: min(440px, 34vw);
  max-height: calc(100vh - 2 * var(--page-margin) - 120px);
  background: linear-gradient(135deg, var(--lcars-gold), var(--lcars-peach));
  color: var(--lcars-ink);
  border-top-left-radius: 48px;
  border-bottom-left-radius: 24px;
  border-top-right-radius: 12px;
  border-bottom-right-radius: 12px;
  border: 1px solid rgba(0,0,0,0.6);
  box-shadow: var(--overlay-shadow);
  padding: 1rem 1rem 1.25rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  overflow: auto;
}
#node-info::before { content: ""; position: absolute; left: 14px; right: 14px; top: 56px; height: 10px; background: #ffffff; border-radius: 999px; opacity: 0.95; pointer-events: none; }
#node-info h2 { margin: 0; font-size: 1.25rem; color: var(--primary); cursor: move; user-select: none; letter-spacing: 0.06em; text-transform: uppercase; }

#type-filter { display: flex; flex-direction: column; gap: 0.75rem; padding: 1rem 1.25rem; background: linear-gradient(140deg, rgba(254, 202, 202, 0.55), rgba(254, 226, 226, 0.4)); border-radius: 12px; border: 1px solid rgba(148, 163, 184, 0.4); flex: 1 1 260px; }
#type-filter.is-hidden { display: none; }
#series-filter, #season-filter, #date-filter, #search-filter { display: flex; flex-direction: column; gap: 0.75rem; padding: 1rem 1.25rem; background: linear-gradient(140deg, rgba(254, 202, 202, 0.55), rgba(254, 226, 226, 0.4)); border-radius: 12px; border: 1px solid rgba(148, 163, 184, 0.4); flex: 1 1 240px; }
#series-filter.is-hidden, #season-filter.is-hidden { display: none; }

/* Date filter slider */
#date-filter .dual-slider { position: relative; height: 44px; margin-top: 0.25rem; }
#date-filter .dual-slider .track,
#date-filter .dual-slider .highlight { position: absolute; left: 0; right: 0; height: 6px; top: 50%; transform: translateY(-50%); border-radius: 999px; }
#date-filter .dual-slider .track { background: #e5e7eb; }
#date-filter .dual-slider .highlight { background: rgba(192, 28, 40, 0.6); left: 25%; width: 50%; }
#date-filter .dual-slider .thumb { position: absolute; top: 50%; transform: translate(-50%, -50%); width: 18px; height: 18px; border-radius: 50%; border: 2px solid var(--primary); background: #fff; box-shadow: 0 1px 2px rgba(0,0,0,0.25); cursor: grab; }
#date-filter .dual-slider .thumb:active { cursor: grabbing; }
#date-filter .dual-slider .label { position: absolute; top: 0; transform: translate(-50%, -125%); font-size: 0.8rem; color: var(--lcars-ink); background: rgba(255,255,255,0.95); border: 1px solid rgba(148,163,184,0.5); padding: 0.05rem 0.35rem; border-radius: 6px; }

#type-filter h3 { margin: 0; font-size: 1.05rem; color: var(--primary); }
#search-filter h3, #series-filter h3, #season-filter h3, #date-filter h3 { margin: 0; font-size: 1.05rem; color: var(--primary); }
#type-filter-options { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 0.5rem 1rem; }
.filter-option { display: flex; align-items: center; gap: 0.65rem; font-size: 0.9rem; color: var(--lcars-ink); }
.filter-option input { width: 1rem; height: 1rem; accent-color: var(--primary); }
.filter-color { width: 0.85rem; height: 0.85rem; border-radius: 50%; background: var(--color, var(--primary)); box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.9), 0 0 6px rgba(37, 99, 235, 0.35); }
.filter-helper { margin: 0; font-size: 0.8rem; color: var(--lcars-ink); }

#node-details { margin: 0; display: flex; flex-direction: column; gap: 0.85rem; }
.node-detail-card { position: relative; display: flex; flex-direction: column; gap: 0.5rem; padding: 1rem 1.25rem; border-radius: 12px; border: 1px solid rgba(0,0,0,0.45); background: linear-gradient(140deg, rgba(255, 210, 126, 0.35), rgba(182, 138, 217, 0.28)); box-shadow: 0 10px 18px rgba(15, 23, 42, 0.12); }
.node-type-badge { align-self: flex-start; padding: 0.2rem 0.75rem; border-radius: 999px; font-size: 0.7rem; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 800; color: var(--lcars-ink); background: rgba(255,255,255,0.92); border: 1px solid rgba(148, 163, 184, 0.45); }
.node-title { margin: 0; font-size: 1.2rem; color: var(--lcars-ink); }
.node-description { margin: 0; color: var(--lcars-ink); line-height: 1.5; font-size: 0.95rem; }

.relations-section { display: flex; flex-direction: column; gap: 0.6rem; margin-top: 0.5rem; padding-top: 0.5rem; border-top: 1px solid rgba(0,0,0,0.35); }
.relations-title { margin: 0.2rem 0 0.2rem; font-size: 1rem; color: var(--primary); }
.relations-group { display: flex; flex-direction: column; gap: 0.35rem; }
.relations-group-title { margin: 0.2rem 0 0.1rem; font-size: 0.82rem; color: var(--primary); font-weight: 600; letter-spacing: 0.02em; display: flex; align-items: center; gap: 0.5rem; }
.relations-color { width: 0.6rem; height: 0.6rem; border-radius: 50%; background: var(--color, #2563eb); box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.12); }
.relation-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 0.25rem; }
.relation-item { display: flex; align-items: center; gap: 0.5rem; }
.relation-link { padding: 0.15rem 0.35rem; border-radius: 6px; border: 1px solid transparent; background: transparent; color: var(--lcars-ink); cursor: pointer; font-size: 0.92rem; text-align: left; transition: background 0.15s ease, border 0.15s ease, transform 0.15s ease; }
.relation-link:hover { background: rgba(255,255,255,0.6); border-color: rgba(0,0,0,0.25); transform: translateY(-1px); }

.node-status-card { padding: 1rem 1.25rem; border-radius: 12px; border: 1px solid rgba(0,0,0,0.45); background: linear-gradient(140deg, rgba(255, 210, 126, 0.28), rgba(182, 138, 217, 0.22)); color: var(--lcars-ink); }
.node-status-title { margin: 0 0 0.4rem; font-size: 1.05rem; color: var(--primary); }
.node-status-description { margin: 0; line-height: 1.5; }

#node-info button { align-self: flex-start; padding: 0.4rem 0.85rem; border-radius: 999px; border: none; background: var(--lcars-amber); color: var(--lcars-ink); cursor: pointer; transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease; }
#node-info button:hover { transform: translateY(-1px); box-shadow: 0 6px 12px rgba(15, 23, 42, 0.18); background: var(--lcars-sand); }

footer { position: fixed; bottom: var(--page-margin); left: 50%; transform: translateX(-50%); z-index: 30; padding: 0.5rem 0.85rem; text-align: center; font-size: 0.85rem; color: var(--lcars-ink); background: var(--footer-bg); border: 1px solid var(--overlay-border); border-radius: 999px; box-shadow: var(--overlay-shadow); white-space: nowrap; }

/* Header quick actions */
.header-actions { position: absolute; top: 10px; right: 12px; display: flex; align-items: center; gap: 8px; }
.header-actions button, .header-actions a { appearance: none; border: none; background: var(--lcars-gold); color: var(--lcars-ink); width: 34px; height: 34px; border-radius: 999px; cursor: pointer; display: grid; place-items: center; font-size: 16px; line-height: 1; box-shadow: 0 4px 10px rgba(15,23,42,0.15); }
.header-actions button:hover, .header-actions a:hover { background: var(--lcars-sand); }

/* LCARS Pads stack (Filters, Release Notes, Coffee) */
.lcars-pads { position: fixed; top: calc(var(--page-margin) + 0.25rem + 56px + 6px); left: calc(var(--page-margin) + 0.25rem); right: auto; width: 240px; display: flex; flex-direction: column; gap: 6px; z-index: 28; }
.lcars-pad { position: relative; appearance: none; border: 1px solid rgba(0,0,0,0.6); color: var(--lcars-ink); text-decoration: none; text-transform: uppercase; letter-spacing: 0.06em; font-weight: 800; height: 32px; padding: 0 14px 0 14px; border-top-left-radius: 26px; border-bottom-left-radius: 26px; border-top-right-radius: 8px; border-bottom-right-radius: 8px; box-shadow: none; display: flex; align-items: center; justify-content: flex-start; width: 100%; min-width: 0; max-width: 100%; box-sizing: border-box; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; cursor: pointer; }
.lcars-pad::after { content: ""; position: absolute; right: 6px; top: 6px; bottom: 6px; width: 12px; border-radius: 4px; background: #ffffff; }
.lcars-pad.lcars-large { height: 48px; width: 100%; min-width: 0; font-size: 1rem; }
.lcars-primary { background: var(--lcars-amber); }
.lcars-secondary { background: var(--lcars-gold); }
.lcars-tertiary { background: var(--lcars-peach); }
.lcars-pad:hover { filter: brightness(1.02); transform: translateY(-1px); }
.lcars-pad:active { transform: translateY(0); }

/* Make Release Notes and Buy me a coffee match Filters (color + size) */
#release-notes-btn,
#bmac-link {
  background: var(--lcars-amber);
  height: 48px;
  font-size: 1rem;
  max-width: 100%;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Enhance selects */
#series-filter select, #season-filter select { padding: 0.4rem 0.6rem; border-radius: 8px; border: 1px solid rgba(148,163,184,0.6); background: #fff; color: var(--lcars-ink); }

/* Release Notes Modal */
#release-notes-modal { position: fixed; inset: 0; display: none; z-index: 50; }
#release-notes-modal.rn-open { display: block; }
#release-notes-modal.rn-hidden { display: none; }
.rn-backdrop { position: absolute; inset: 0; background: rgba(15,23,42,0.55); backdrop-filter: blur(2px); }
.rn-card { position: relative; margin: 6vh auto; max-width: min(880px, 92vw); background: #ffffff; color: var(--lcars-ink); border-radius: 14px; box-shadow: 0 20px 60px rgba(15,23,42,0.35); overflow: hidden; border: 1px solid rgba(148,163,184,0.35); }
.rn-card-header { display: flex; align-items: center; justify-content: space-between; padding: 1rem 1.25rem; background: linear-gradient(45deg, var(--primary), var(--primary-strong)); color: #fff; }
.rn-card-body { padding: 1rem 1.25rem 1.25rem; display: flex; flex-direction: column; gap: 1rem; }
.rn-close { appearance: none; border: 1px solid rgba(255,255,255,0.6); background: rgba(255,255,255,0.15); color: #fff; width: 34px; height: 34px; border-radius: 999px; cursor: pointer; font-size: 20px; line-height: 1; display: grid; place-items: center; }
.rn-section { background: #fff; border: 1px solid rgba(148,163,184,0.35); border-radius: 12px; padding: 0.85rem 1rem; }
.rn-section-title { margin: 0 0 0.35rem; color: var(--primary); font-size: 1.05rem; }
.rn-list { margin: 0.25rem 0 0; padding-left: 1.2rem; }
.rn-list li { margin: 0.25rem 0; }

@media (max-width: 900px) {
  main { grid-template-columns: 1fr; }
  #splitter { display: none; }
  #node-info { order: -1; }
}