/*!
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

/*
 * The site's components, built out of design/tokens.css: page chrome, prose, panels, controls,
 * tables and the boot panel every project shows while it loads itself into the tab.
 *
 * Class names are the vocabulary the pages speak: a project page writes `<header class="topbar">`
 * and gets the same header as every other project, and a control is a `.button` whatever it does.
 */

/* -- base ---------------------------------------------------------------------------------------- */

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  font-weight: 400;
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
  margin: 0;
  text-wrap: balance;
}

h1 {
  font-size: var(--step-3);
}
h2 {
  font-size: var(--step-2);
}
h3 {
  font-size: var(--step-1);
}

p {
  margin: 0;
}

a {
  color: var(--accent);
  text-decoration: none;
  text-underline-offset: 0.2em;
  text-decoration-thickness: from-font;
}

a:hover {
  text-decoration: underline;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

code,
pre,
.mono,
.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

pre {
  margin: 0;
}

::selection {
  background: var(--accent);
  color: var(--inverse-ink);
}

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

/* The small uppercase-ish label above a block; on cognition.com these are the section numbers. */
.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--step--2);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--ink-faint);
  display: block;
}

.lede {
  font-size: var(--step-1);
  max-width: var(--measure);
}

.prose {
  max-width: var(--measure);
}

.prose + .prose {
  margin-top: var(--space-4);
}

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

.meta {
  font-family: var(--font-heading);
  font-size: var(--step--1);
  color: var(--ink-faint);
}

.serif-link {
  color: var(--ink);
  text-decoration: underline;
}

/* -- the project list at / ----------------------------------------------------------------------- */

.site {
  display: grid;
  grid-template-columns: var(--rail) minmax(0, 1fr);
  gap: 0 var(--gutter);
  align-items: start;
  max-width: 78rem;
  margin: 0 auto;
  padding: var(--space-5) var(--gutter) var(--space-7);
}

/* The rail: the mark and the links, pinned while the list scrolls past it. */
.rail {
  position: sticky;
  top: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  font-family: var(--font-heading);
  font-size: var(--step--1);
}

.rail__home {
  color: var(--ink);
  letter-spacing: var(--tracking-tight);
}

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

.rail__links {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.rail__links a {
  color: var(--ink);
  padding-left: 0.6rem;
  border-left: var(--hairline) solid transparent;
}

.rail__links a[aria-current="page"],
.rail__links a:hover {
  color: var(--accent);
  border-left-color: var(--accent);
  text-decoration: none;
}

.site__main {
  display: flex;
  flex-direction: column;
  border-left: var(--hairline) solid var(--rule);
  padding-left: var(--gutter);
}

/* A numbered band of the page: the number sits in the left margin on wide screens. */
.band {
  position: relative;
  padding: var(--space-6) 0;
  border-bottom: var(--hairline) solid var(--rule);
}

.band:first-child {
  padding-top: var(--space-2);
}

.band:last-child {
  border-bottom: 0;
}

/* Bands are one thought each, so their parts only ever need one rhythm between them. */
.band > * + * {
  margin-top: var(--space-4);
}

.band > .eyebrow {
  position: absolute;
  left: calc(-1 * var(--gutter) - 1.4rem);
  top: calc(var(--space-6) + 0.35rem);
}

@media (max-width: 60rem) {
  .site {
    grid-template-columns: minmax(0, 1fr);
    padding-top: var(--space-4);
  }

  .rail {
    position: static;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    padding-bottom: var(--space-4);
    border-bottom: var(--hairline) solid var(--rule);
  }

  .rail__links {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-1) var(--space-3);
  }

  /* On a phone the rail is one line: the mark and the projects, with the source link at the foot. */
  .rail__source {
    display: none;
  }

  .rail__links a {
    padding-left: 0;
    border-left: 0;
    border-bottom: var(--hairline) solid transparent;
  }

  .rail__links a[aria-current="page"],
  .rail__links a:hover {
    border-left-color: transparent;
    border-bottom-color: var(--accent);
  }

  .site__main {
    border-left: 0;
    padding-left: 0;
  }

  .band > .eyebrow {
    position: static;
  }
}

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

.cards {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--hairline);
  grid-template-columns: repeat(auto-fill, minmax(20rem, 1fr));
}

/*
 * Cards are cells in a hairline grid: each is outlined, and the gap is one hairline wide, so
 * neighbouring outlines land on the same line.  An outline rather than a border keeps the grid even
 * when the last row is short -- an empty cell is simply paper.
 */
.card {
  background: var(--paper);
  outline: var(--hairline) solid var(--rule);
  transition: background var(--duration) ease;
}

.card:hover {
  background: var(--wash);
}

.card > a {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  height: 100%;
  padding: var(--space-4) var(--space-4) var(--space-5);
  color: var(--ink);
}

.card > a:hover {
  text-decoration: none;
}

.card__title {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--step-1);
  letter-spacing: var(--tracking-tight);
}

/* The one place a project's own colour shows up on the list. */
.card__title::before {
  content: "";
  width: 0.5rem;
  height: 0.5rem;
  flex: none;
  background: var(--brand, var(--accent));
}

.card__version {
  font-family: var(--font-mono);
  font-size: var(--step--2);
  color: var(--ink-faint);
  margin-left: auto;
}

.card p {
  color: var(--ink-soft);
}

.card__open {
  margin-top: auto;
  padding-top: var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--step--1);
  color: var(--accent);
}

.card > a:hover .card__open {
  text-decoration: underline;
}

/* -- chips --------------------------------------------------------------------------------------- */

.chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-2);
  margin: 0;
  padding: 0;
}

.chip {
  font-family: var(--font-heading);
  font-size: var(--step--2);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--ink-faint);
  border: var(--hairline) solid var(--rule-strong);
  border-radius: var(--radius);
  padding: 0.1rem 0.4rem;
  white-space: nowrap;
}

/* -- app chrome ---------------------------------------------------------------------------------- */

/* Every project page wears the same bar: back to the list, its name, what it is doing, its facts. */
.topbar {
  display: flex;
  align-items: baseline;
  gap: var(--space-2) var(--space-4);
  flex-wrap: wrap;
  padding: var(--space-3) var(--gutter);
  background: var(--paper);
  border-bottom: var(--hairline) solid var(--rule-strong);
  font-family: var(--font-heading);
  font-size: var(--step--1);
}

.topbar__back {
  color: var(--ink-faint);
  white-space: nowrap;
}

.topbar__back:hover {
  color: var(--accent);
}

.topbar h1 {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  font-size: var(--step-0);
  letter-spacing: var(--tracking-tight);
  white-space: nowrap;
}

.topbar h1::before {
  content: "";
  width: 0.45rem;
  height: 0.45rem;
  background: var(--brand);
  flex: none;
}

.topbar__grow {
  flex: 1;
}

.topbar__status {
  color: var(--ink-faint);
  font-variant-numeric: tabular-nums;
}

.topbar__facts {
  color: var(--ink-faint);
  font-size: var(--step--2);
  text-align: right;
  line-height: 1.4;
}

@media (max-width: 40rem) {
  .topbar__facts {
    text-align: left;
  }
}

/* Every project page is the same shell: the bar, then one region that fills the rest of the tab. */
.app {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
}

.app__main {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

/* Where the boot panel is mounted, and where it stays -- collapsed -- once the project is up. */
.app__boot {
  padding: var(--space-4) var(--gutter);
}

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

button,
select,
input,
textarea {
  font: inherit;
  color: inherit;
}

.button,
button.button {
  font-family: var(--font-heading);
  font-size: var(--step--1);
  border: var(--hairline) solid var(--ink);
  border-radius: var(--radius);
  background: transparent;
  color: var(--ink);
  padding: 0.25rem 0.6rem;
  cursor: pointer;
  text-align: left;
  transition: background var(--duration) ease, color var(--duration) ease,
    border-color var(--duration) ease;
}

.button:hover:not(:disabled) {
  background: var(--inverse);
  border-color: var(--inverse);
  color: var(--inverse-ink);
}

.button--primary {
  background: var(--inverse);
  border-color: var(--inverse);
  color: var(--inverse-ink);
}

.button--primary:hover:not(:disabled) {
  background: var(--accent);
  border-color: var(--accent);
}

.button--quiet {
  border-color: var(--rule-strong);
  color: var(--ink-soft);
}

.button:disabled {
  opacity: 0.4;
  cursor: default;
}

.field,
input[type="text"],
textarea,
select {
  border: var(--hairline) solid var(--rule-strong);
  border-radius: var(--radius);
  background: var(--wash);
  padding: 0.3rem 0.45rem;
}

textarea,
input[type="text"] {
  width: 100%;
}

textarea {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  line-height: 1.45;
  resize: vertical;
}

label {
  font-family: var(--font-heading);
  font-size: var(--step--1);
  color: var(--ink-faint);
}

/* -- panels -------------------------------------------------------------------------------------- */

.panel {
  border: var(--hairline) solid var(--rule);
  border-radius: var(--radius);
  background: var(--wash);
  padding: var(--space-3);
}

.panel > * + * {
  margin-top: var(--space-2);
}

.panel > h2,
.panel > h3 {
  font-family: var(--font-heading);
  font-size: var(--step--2);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: var(--space-2);
}

/* A strip of controls across a pane, ruled off from what it acts on. */
.toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  padding: var(--space-2) var(--gutter);
  border-bottom: var(--hairline) solid var(--rule);
  font-family: var(--font-heading);
  font-size: var(--step--1);
}

.toolbar__grow {
  flex: 1;
}

/* An aside in small type: what a control does, how many rows came back. */
.note {
  font-family: var(--font-heading);
  font-size: var(--step--1);
  color: var(--ink-faint);
}

.row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

/* -- tabs ---------------------------------------------------------------------------------------- */

.tabs {
  display: flex;
  gap: var(--space-4);
  border-bottom: var(--hairline) solid var(--rule-strong);
}

.tabs button {
  font-family: var(--font-heading);
  font-size: var(--step--1);
  border: 0;
  background: none;
  color: var(--ink-faint);
  padding: var(--space-2) 0;
  margin-bottom: -1px;
  border-bottom: 2px solid transparent;
  cursor: pointer;
}

.tabs button:hover {
  color: var(--ink);
}

.tabs button[aria-selected="true"] {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

/* -- tables -------------------------------------------------------------------------------------- */

table.grid {
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  width: 100%;
}

table.grid th,
table.grid td {
  border: var(--hairline) solid var(--rule);
  padding: 0.2rem 0.45rem;
  text-align: left;
  white-space: nowrap;
}

table.grid th {
  background: var(--wash-strong);
  font-family: var(--font-heading);
  font-weight: 400;
  color: var(--ink-soft);
  letter-spacing: 0;
}

table.grid td.num {
  text-align: right;
}

table.grid td.null {
  color: var(--ink-ghost);
}

.scroll {
  overflow: auto;
}

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

.error {
  color: var(--bad);
  font-family: var(--font-mono);
  font-size: var(--step--1);
  white-space: pre-wrap;
}

/* -- the boot panel ------------------------------------------------------------------------------ */

/*
 * What every project shows while it downloads and starts itself: one honest sentence, a progress
 * bar, the steps as they happen, and the log the runtime is actually writing -- open by default,
 * because on this site the loading *is* the demo.
 */

.boot {
  border: var(--hairline) solid var(--rule-strong);
  border-radius: var(--radius);
  background: var(--paper);
  display: flex;
  flex-direction: column;
  container-type: inline-size;
}

.boot__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-2) var(--space-4);
  align-items: start;
  padding: var(--space-4);
}

.boot__title {
  font-family: var(--font-heading);
  font-size: var(--step-1);
  letter-spacing: var(--tracking-tight);
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
}

.boot__title::before {
  content: "";
  width: 0.5rem;
  height: 0.5rem;
  flex: none;
  background: var(--brand);
  animation: boot-pulse 1.6s ease-in-out infinite;
}

.boot__detail {
  grid-column: 1;
  color: var(--ink-soft);
  max-width: var(--measure);
}

/* Elapsed time and bytes: mono, right-aligned, so the numbers tick in place. */
.boot__counters {
  grid-column: 2;
  grid-row: 1 / span 2;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.1rem;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  color: var(--ink-faint);
  white-space: nowrap;
}

.boot__meter {
  height: 3px;
  background: var(--wash-strong);
  overflow: hidden;
}

.boot__bar {
  height: 100%;
  width: 0;
  background: var(--accent);
  transition: width 0.2s linear;
}

/* No byte counts to go on: a bar that travels, so the page still shows it is working. */
.boot[data-progress="indeterminate"] .boot__bar {
  width: 30%;
  animation: boot-travel 1.4s ease-in-out infinite;
}

.boot[data-state="done"] .boot__bar {
  width: 100%;
  background: var(--good);
}

.boot[data-state="failed"] .boot__bar {
  background: var(--bad);
}

.boot[data-state="done"] .boot__title::before,
.boot[data-state="failed"] .boot__title::before {
  animation: none;
}

.boot[data-state="done"] .boot__title::before {
  background: var(--good);
}

.boot[data-state="failed"] .boot__title::before {
  background: var(--bad);
}

.boot__now {
  padding: var(--space-2) var(--space-4);
  border-bottom: var(--hairline) solid var(--rule);
  font-family: var(--font-mono);
  font-size: var(--step--1);
  color: var(--ink-soft);
  display: flex;
  gap: var(--space-2);
  align-items: baseline;
}

.boot__now::before {
  content: "›";
  color: var(--accent);
}

.boot__steps {
  list-style: none;
  margin: 0;
  padding: var(--space-3) var(--space-4);
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  font-size: var(--step--1);
}

.boot__step {
  display: grid;
  grid-template-columns: 1.1rem minmax(0, 1fr) auto;
  gap: var(--space-2);
  align-items: baseline;
  color: var(--ink-soft);
}

.boot__step::before {
  font-family: var(--font-mono);
  color: var(--ink-ghost);
  content: "·";
  display: inline-block;
  text-align: center;
}

.boot__step[data-state="running"] {
  color: var(--ink);
}

.boot__step[data-state="running"]::before {
  content: "◐";
  color: var(--accent);
  animation: boot-spin 1s steps(4) infinite;
}

.boot__step[data-state="done"]::before {
  content: "✓";
  color: var(--good);
}

.boot__step[data-state="failed"] {
  color: var(--bad);
}

.boot__step[data-state="failed"]::before {
  content: "✕";
  color: var(--bad);
}

.boot__timing {
  font-family: var(--font-mono);
  font-size: var(--step--2);
  color: var(--ink-faint);
  white-space: nowrap;
}

.boot__logs {
  display: flex;
  flex-direction: column;
  border-top: var(--hairline) solid var(--rule);
}

.boot__log {
  border-bottom: var(--hairline) solid var(--rule);
}

.boot__log:last-child {
  border-bottom: 0;
}

.boot__log > summary {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-heading);
  font-size: var(--step--2);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--ink-faint);
  cursor: pointer;
}

.boot__log > summary::marker,
.boot__log > summary::-webkit-details-marker {
  content: "";
  display: none;
}

.boot__log > summary::before {
  content: "+";
  font-family: var(--font-mono);
  width: 0.7rem;
}

.boot__log[open] > summary::before {
  content: "–";
}

.boot__log > summary:hover {
  color: var(--ink);
}

.boot__count {
  margin-left: auto;
  font-family: var(--font-mono);
  text-transform: none;
  letter-spacing: 0;
}

.boot__lines {
  margin: 0;
  padding: 0 var(--space-4) var(--space-3);
  max-height: 14rem;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: var(--font-mono);
  font-size: var(--step--2);
  line-height: 1.55;
  color: var(--ink-faint);
}

.boot__lines:empty::after {
  content: "nothing yet";
  color: var(--ink-ghost);
}

.boot__note {
  padding: var(--space-3) var(--space-4);
  border-top: var(--hairline) solid var(--rule);
  font-size: var(--step--1);
  color: var(--ink-soft);
}

.boot__note--error {
  color: var(--bad);
  font-family: var(--font-mono);
  white-space: pre-wrap;
}

/* Ready: the panel steps out of the way, keeping the log one click away. */
.boot[data-state="done"] .boot__steps,
.boot[data-state="done"] .boot__now,
.boot[data-state="done"] .boot__detail {
  display: none;
}

.boot[data-state="done"] .boot__head {
  padding-bottom: var(--space-3);
}

.boot[data-state="done"] .boot__title {
  font-size: var(--step-0);
}

@container (max-width: 30rem) {
  .boot__head {
    grid-template-columns: minmax(0, 1fr);
  }

  .boot__counters {
    grid-column: 1;
    grid-row: auto;
    flex-direction: row;
    gap: var(--space-3);
    align-items: baseline;
  }
}

@keyframes boot-pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.25;
  }
}

@keyframes boot-travel {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(333%);
  }
}

@keyframes boot-spin {
  to {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .boot__title::before,
  .boot[data-progress="indeterminate"] .boot__bar,
  .boot__step[data-state="running"]::before {
    animation: none;
  }
}