/* Shared style for the Redis internals visualizers.
 *
 * Redis red on near-black. It began as the portfolio's hidden [data-theme="redis"],
 * but that palette put a blue cast on every neutral — faint ran +43 blue over
 * red, dim +30 — and across a page of dense text it read as cyan rather than as
 * a dark ground. The neutrals are now within +13 of neutral, so the red is the
 * only thing carrying a hue, which is the point.
 *
 * Every colour here clears 4.5:1 on all three surfaces; the old faint managed
 * 3.42 on a byte cell. Nothing is set below 12.5px.
 *
 * Deliberately self-contained: no import of site.css, so a change to the
 * portfolio's design cannot break ten visualizers, and PRODUCT.md's record of
 * these pages as standalone stays true.
 *
 * Replaces the Tailwind Play CDN, which is a JIT compiler that runs in the
 * browser and which Tailwind's own docs say is not for production.
 */

:root {
  --bg: #091016; /* near-black with a hint of blue; the red carries the identity */
  --bg-2: #0f161c; /* one tonal step up: panels, wells */
  --bg-3: #1e252b; /* two steps: byte cells, chips */
  --fg: #e7e9ea;
  --dim: #b2b5b8; /* secondary text */
  --faint: #92969a; /* labels, gutters, placeholders */
  --rule: #262d33; /* hairlines */
  --red: #ff4438; /* Redis red. The one attention colour. */
  --ok: #5cc46f; /* a state that is fine */
  --warn: #e8ab1a; /* a state that is degrading */

  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;

  color-scheme: dark;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

/* Every display: rule below outranks the UA's [hidden] on equal specificity,
   so a hidden .pill stays visible — which shipped as "missed 0 pushes" on a
   client that had missed nothing. !important is the point: it has to beat
   anything this file or a page sets. */
[hidden] {
  display: none !important;
}

body {
  margin: 0;
  padding: 32px 24px 64px;
  font: 400 15.5px/1.65 var(--sans);
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
}

/* ---------------------------------------------------------------- type */

h1,
h2,
h3,
p,
ul,
ol,
figure,
pre {
  margin: 0;
}

h1 {
  font: 600 25px/1.3 var(--mono);
  letter-spacing: -0.01em;
}

/* The subject, not decoration: every page names the C file it came from. */
.src {
  margin-top: 4px;
  font: 400 13.5px/1.6 var(--mono);
  color: var(--faint);
}

.src a {
  color: inherit;
}

h2 {
  font: 600 16px/1.5 var(--mono);
  letter-spacing: -0.005em;
}

h3 {
  font: 500 14px/1.5 var(--mono);
  color: var(--dim);
}

.lede {
  margin-top: 8px;
  max-width: 68ch;
  color: var(--dim);
}

.muted {
  color: var(--dim);
}

.faint {
  color: var(--faint);
}

/* Anything a reader compares down a column. */
.num,
.byte,
.addr,
td,
.log {
  font-variant-numeric: tabular-nums;
}

code,
.mono {
  font-family: var(--mono);
  font-size: 0.92em;
}

/* ------------------------------------------------------------- surface */

.panel {
  padding: 14px 16px;
  background: var(--bg-2);
  border: 1px solid var(--rule);
  border-radius: 6px;
}

.panel + .panel {
  margin-top: 12px;
}

.panel__head {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 10px;
}

.grid {
  display: grid;
  gap: 12px;
}

@media (min-width: 860px) {
  .grid--2 {
    grid-template-columns: 1fr 1fr;
  }
  .grid--side {
    grid-template-columns: minmax(0, 1fr) 320px;
  }
}

/* ------------------------------------------------------------ controls */

button,
.btn {
  font: 500 13.5px/1.6 var(--mono);
  color: var(--dim);
  padding: 5px 11px;
  background: none;
  border: 1px solid var(--rule);
  border-radius: 4px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background-color 0.15s;
}

button:hover,
.btn:hover {
  color: var(--fg);
  border-color: var(--faint);
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

button:disabled:hover {
  color: var(--dim);
  border-color: var(--rule);
}

/* The one action that advances the simulation. One per screen. */
.btn--go {
  color: var(--bg);
  background: var(--red);
  border-color: var(--red);
}

.btn--go:hover {
  color: var(--bg);
  background: #ff5f55;
  border-color: #ff5f55;
}

.btn[aria-pressed="true"] {
  color: var(--fg);
  background: var(--bg-3);
  border-color: var(--faint);
}

input,
select {
  font: 400 13.5px/1.6 var(--mono);
  color: var(--fg);
  padding: 5px 9px;
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: 4px;
  transition: border-color 0.15s;
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--faint);
}

input::placeholder {
  color: var(--faint);
}

input[type="range"] {
  padding: 0;
  border: 0;
  accent-color: var(--red);
}

label {
  font: 400 13.5px/1.6 var(--mono);
  color: var(--faint);
}

:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 2px;
  border-radius: 2px;
}

/* --------------------------------------------------------------- state */

.pill {
  display: inline-block;
  padding: 1px 8px;
  font: 500 12.5px/1.7 var(--mono);
  letter-spacing: 0.02em;
  border: 1px solid var(--rule);
  border-radius: 999px;
  color: var(--dim);
}

.pill--ok {
  color: var(--ok);
  border-color: color-mix(in srgb, var(--ok) 45%, transparent);
}

.pill--warn {
  color: var(--warn);
  border-color: color-mix(in srgb, var(--warn) 45%, transparent);
}

.pill--fail {
  color: var(--red);
  border-color: color-mix(in srgb, var(--red) 50%, transparent);
}

/* ------------------------------------------------------------ the bytes */

/* These pages exist to show layout, so a byte is a first-class object. */
.bytes {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
  font: 400 13.5px/1 var(--mono);
}

.byte {
  min-width: 2.2em;
  padding: 6px 4px;
  text-align: center;
  background: var(--bg-3);
  border: 1px solid var(--rule);
  border-radius: 3px;
}

.byte--hdr {
  border-color: color-mix(in srgb, var(--dim) 40%, transparent);
  color: var(--dim);
}

.byte--enc {
  border-color: color-mix(in srgb, var(--red) 50%, transparent);
  color: var(--red);
}

.byte--data {
  color: var(--fg);
}

.byte--back {
  border-color: color-mix(in srgb, var(--ok) 40%, transparent);
  color: var(--ok);
}

.byte--eof {
  border-style: dashed;
  color: var(--faint);
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin-top: 10px;
  font: 400 12.5px/1.7 var(--mono);
  color: var(--faint);
}

.legend b {
  font-weight: 400;
  color: var(--dim);
}

/* --------------------------------------------------------------- code */

pre,
.dump {
  overflow-x: auto;
  padding: 10px 12px;
  font: 400 13.5px/1.6 var(--mono);
  color: var(--dim);
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: 5px;
}

pre b {
  font-weight: 400;
  color: var(--red);
}

/* A citation into the real source. Never decorative. */
.cite {
  font: 400 12.5px/1.6 var(--mono);
  color: var(--faint);
}

/* ---------------------------------------------------------------- log */

.log {
  max-height: 260px;
  overflow-y: auto;
  padding: 8px 10px;
  font: 400 13.5px/1.7 var(--mono);
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: 5px;
}

.log p {
  color: var(--dim);
}

.log p::before {
  content: "⎿ ";
  color: var(--faint);
}

.log .t {
  color: var(--faint);
  padding-right: 1ch;
}

.log .hit {
  color: var(--red);
}

.log .good {
  color: var(--ok);
}

/* ------------------------------------------------------------ tooltip */

.tip {
  position: relative;
  border-bottom: 1px dotted var(--faint);
  cursor: help;
}

.tip__body {
  display: none;
  position: absolute;
  left: 0;
  top: calc(100% + 6px);
  z-index: 5;
  width: max-content;
  max-width: min(44ch, 78vw);
  padding: 8px 11px;
  font: 400 13.5px/1.6 var(--mono);
  color: var(--dim);
  background: var(--bg-2);
  border: 1px solid var(--rule);
  border-radius: 5px;
}

.tip:hover .tip__body,
.tip:focus-visible .tip__body {
  display: block;
}

/* --------------------------------------------------------------- back */

.back {
  display: inline-block;
  margin-bottom: 20px;
  font: 400 13.5px/1.6 var(--mono);
  color: var(--faint);
  text-decoration: none;
}

.back:hover {
  color: var(--red);
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}