/*
 * Shared design tokens.
 *
 * Both pages consume these, so the dashboard and the knowledge graph read as
 * one product rather than two tools that happen to be served by one process.
 *
 * The palette is built around ONE idea: what you kept is bright, what it would
 * have cost is dim. Mint carries every "saved" quantity and nothing else;
 * amber carries every "would have cost" quantity and nothing else. Because the
 * two are used consistently, the before/after bar is readable without its
 * labels -- but the labels are always there anyway, so colour is never the only
 * encoding.
 *
 * Status colours (good/warn/bad) are deliberately separate from the accent, so
 * a healthy verdict can never be confused with a savings figure.
 */

:root {
  /* Ground. Near-black with a slight cyan bias so mint sits on it naturally
     rather than vibrating against a pure neutral. */
  --bg: #0a0f14;
  --surface: #111922;
  --surface-2: #18232e;
  --surface-3: #21303e;
  --line: #24333f;
  --line-bright: #35485a;

  /* Ink */
  --ink: #eaf2f7;
  --ink-2: #a3b6c4;
  --ink-3: #6c8091;

  /* The one bright thing on the page: what you kept. */
  --saved: #2ee6a8;
  --saved-dim: rgba(46, 230, 168, 0.16);
  --saved-glow: rgba(46, 230, 168, 0.28);

  /* What it would have cost. Always the dim half of a comparison. */
  --spent: #f0a742;
  --spent-dim: rgba(240, 167, 66, 0.18);

  /* The graph is its own world -- a cool hue that belongs to neither side of
     the savings comparison, so a node can never read as a quantity. */
  --graph: #7aa2f7;
  --graph-dim: rgba(122, 162, 247, 0.18);
  --graph-2: #b48ef7;

  /* Status, reserved. Never reused as a series colour. */
  --ok: #2ee6a8;
  --warn: #f0a742;
  --bad: #f2545b;

  --radius: 14px;
  --radius-sm: 8px;
  --gap: 20px;

  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --mono: 'SF Mono', 'Cascadia Mono', 'JetBrains Mono', Consolas, monospace;

  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

/* Digits that line up in columns must not jitter as they count. */
.num {
  font-variant-numeric: tabular-nums;
  font-feature-settings: 'tnum';
}

a {
  color: var(--graph);
}

/* ---------------------------------------------------------------- shell -- */

.shell {
  max-width: 1240px;
  margin: 0 auto;
  padding: 28px 24px 72px;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 26px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 17px;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.brand .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--saved);
  box-shadow: 0 0 12px var(--saved-glow);
  align-self: center;
}

.nav {
  display: flex;
  gap: 4px;
  margin-left: 8px;
}

.nav a {
  color: var(--ink-2);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 550;
}

.nav a:hover {
  background: var(--surface-2);
  color: var(--ink);
}

.nav a[aria-current='page'] {
  background: var(--surface-3);
  color: var(--ink);
}

.topbar .spacer {
  flex: 1;
}

.meta {
  color: var(--ink-3);
  font-size: 12.5px;
}

.btn {
  background: var(--surface-2);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 15px;
  font-size: 13.5px;
  font-weight: 550;
  font-family: inherit;
  cursor: pointer;
}

.btn:hover {
  background: var(--surface-3);
  border-color: var(--line-bright);
}

.btn:focus-visible,
a:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--saved);
  outline-offset: 2px;
}

/* ---------------------------------------------------------------- cards -- */

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.card-title {
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 4px;
  display: flex;
  align-items: center;
  gap: 7px;
}

.card-sub {
  color: var(--ink-3);
  font-size: 12.5px;
  margin: 0 0 16px;
}

/* -------------------------------------------------------------- explain -- */

/*
 * The "?" that turns a number into something a beginner can act on. Kept as a
 * real <button> so it is reachable by keyboard, and the text is in the DOM
 * rather than a title attribute so screen readers get it too.
 */
.explain {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 1px solid var(--line-bright);
  background: none;
  color: var(--ink-3);
  font-size: 10px;
  font-weight: 700;
  font-family: inherit;
  cursor: help;
  padding: 0;
  flex: none;
}

.explain:hover,
.explain:focus-visible {
  border-color: var(--saved);
  color: var(--saved);
}

/*
 * Tips open UPWARD by default, which put them off the top of the viewport for
 * any control near the header -- seen in the first render, where the topmost
 * explainer covered the page title instead of explaining it. `.tip-below`
 * flips one that has no room above; the class is set in markup rather than
 * measured at runtime, because which controls sit near the top is known.
 */
.explain .tip {
  position: absolute;
  bottom: calc(100% + 9px);
  left: 50%;
  transform: translateX(-50%);
  width: 250px;
  background: var(--surface-3);
  border: 1px solid var(--line-bright);
  border-radius: var(--radius-sm);
  padding: 11px 13px;
  font-size: 12.5px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--ink);
  text-transform: none;
  letter-spacing: normal;
  text-align: left;
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.12s ease;
  z-index: 40;
  pointer-events: none;
}

.explain:hover .tip,
.explain:focus-visible .tip {
  opacity: 1;
  visibility: visible;
}

.explain .tip.tip-below {
  bottom: auto;
  top: calc(100% + 9px);
}

/* Near the right edge, a centred tip overflows the page. These pull it back. */
.explain .tip.tip-right {
  bottom: auto;
  top: -6px;
  left: calc(100% + 9px);
  transform: none;
}

.explain .tip.tip-left {
  left: auto;
  right: -8px;
  transform: none;
}

/* --------------------------------------------------------- empty states -- */

/*
 * An empty panel is the FIRST thing a new user sees, so it is the best chance
 * to explain what the tool does. "No data available" wasted that chance.
 */
/*
 * An empty panel should say its piece and get out of the way. The first render
 * gave every empty state the same generous padding as a full one, so an idle
 * page was several screens of near-blank cards.
 */
.empty {
  text-align: center;
  padding: 22px 26px;
  color: var(--ink-2);
}

.empty.is-compact {
  padding: 14px 18px;
}

.empty .mark {
  font-size: 26px;
  margin-bottom: 10px;
  opacity: 0.75;
}

.empty h3 {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.empty p {
  margin: 0 auto;
  max-width: 46ch;
  font-size: 13.5px;
  line-height: 1.6;
}

.empty .next {
  margin-top: 14px;
  font-size: 13px;
  color: var(--ink-3);
}

.empty code {
  font-family: var(--mono);
  font-size: 12.5px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 2px 6px;
  color: var(--ink);
}

/* -------------------------------------------------------------- verdict -- */

.verdict {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 18px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--surface);
  margin-bottom: var(--gap);
}

.verdict .light {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  margin-top: 7px;
  flex: none;
}

.verdict.is-ok .light {
  background: var(--ok);
  box-shadow: 0 0 10px var(--saved-glow);
}
.verdict.is-warn .light {
  background: var(--warn);
}
.verdict.is-bad .light {
  background: var(--bad);
}

.verdict strong {
  display: block;
  font-size: 14.5px;
  font-weight: 620;
}

.verdict span {
  color: var(--ink-2);
  font-size: 13.5px;
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}

/* ------------------------------------------------ interactive 3D graph -- */

.knowledge-graph-3d {
  position: relative;
  width: 100%;
  overflow: hidden;
  isolation: isolate;
  /* The host owns its height (the overview and wiki stages have different
     constraints). A percentage height here made the canvas participate in its
     parent's intrinsic sizing, so ResizeObserver could grow the card forever. */
  contain: layout paint;
}

.knowledge-graph-canvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
  touch-action: none;
}

.knowledge-graph-canvas.is-dragging {
  cursor: grabbing;
}

.graph-3d-chrome {
  position: absolute;
  inset: 12px 12px auto;
  display: flex;
  align-items: center;
  gap: 10px;
  pointer-events: none;
  z-index: 2;
}

.graph-3d-badge {
  border: 1px solid rgba(46, 230, 168, 0.28);
  border-radius: 999px;
  background: rgba(10, 15, 20, 0.72);
  color: var(--saved);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 5px 9px;
  text-transform: uppercase;
  backdrop-filter: blur(8px);
}

.graph-3d-help {
  color: var(--ink-2);
  font-size: 11.5px;
  text-shadow: 0 1px 3px var(--bg);
}

.graph-3d-reset {
  margin-left: auto;
  border: 1px solid rgba(163, 182, 196, 0.22);
  border-radius: 999px;
  background: rgba(10, 15, 20, 0.72);
  color: var(--ink-2);
  font: 550 11.5px var(--font);
  padding: 5px 10px;
  pointer-events: auto;
  cursor: pointer;
  backdrop-filter: blur(8px);
}

.graph-3d-reset:hover {
  border-color: var(--saved);
  color: var(--ink);
}

.graph-3d-tooltip {
  position: absolute;
  z-index: 3;
  width: min(230px, 70%);
  border: 1px solid var(--line-bright);
  border-radius: 7px;
  background: rgba(10, 15, 20, 0.92);
  box-shadow: var(--shadow);
  color: var(--ink);
  font-size: 11.5px;
  line-height: 1.45;
  padding: 7px 9px;
  pointer-events: none;
}