/*
 * Dark only, on purpose: this page is a companion to Steam, which is dark, and
 * a light variant would be a second design to keep honest for no one's benefit.
 */

:root {
  --bg: #0b0f14;
  --bg-glow: #10202e;
  --panel: #151b23;
  --panel-2: #1b232d;
  --panel-hover: #222c38;
  --border: #26313d;
  --border-strong: #34424f;
  --text: #e9eff5;
  --muted: #8a97a6;
  --accent: #66c0f4;
  --accent-deep: #2a7fb8;
  --unlocked: #7bc95a;
  --danger: #ff8a80;

  /* Rarity ramp: the rarer the achievement, the warmer the colour. */
  --rarity-legendary: #f3b53f;
  --rarity-rare: #b478f7;
  --rarity-uncommon: #66c0f4;
  --rarity-common: #8a97a6;

  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 10px 30px rgb(0 0 0 / 50%);
  --wide: 62rem;
}

* {
  box-sizing: border-box;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin: 0;
  padding: 0 1.25rem 2rem;
  /* Fixed, so a short page does not end the glow mid-screen with a visible
     seam where the body box stops. */
  background:
    radial-gradient(90rem 40rem at 50% -18rem, var(--bg-glow), transparent 70%) fixed,
    var(--bg);
  color: var(--text);
  font:
    16px/1.6 system-ui,
    -apple-system,
    "Segoe UI",
    sans-serif;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
}

a {
  color: var(--accent);
  text-underline-offset: 3px;
}

h1,
h2,
h3 {
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

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

/* -- top bar ------------------------------------------------------------- */

.topbar {
  /*
   * Sticky, because the search was gone after the first screen and a game runs
   * to several. Also the anchor for the profile panel once the bar wraps; see
   * the narrow query.
   */
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.25rem;
  align-items: center;
  width: 100%;
  max-width: var(--wide);
  margin: 0 auto;
  padding: 1rem 0 1.1rem;
  /* The page background is a fixed gradient, so a solid colour here would band
     against it. */
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(10px);
}

.brand {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  width: 34px;
  height: 34px;
  flex: none;
}

.brand-badge {
  fill: color-mix(in srgb, var(--accent) 10%, transparent);
  stroke: var(--accent);
  stroke-width: 2;
  stroke-linejoin: round;
}

.brand-check {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-text strong {
  font-size: 1.05rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.brand-text span {
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.01em;
}

/* -- search -------------------------------------------------------------- */

.search {
  position: relative;
  flex: 1 1 20rem;
}

.search-icon {
  position: absolute;
  top: 50%;
  left: 0.85rem;
  width: 18px;
  height: 18px;
  transform: translateY(-50%);
  fill: none;
  stroke: var(--muted);
  stroke-width: 2;
  stroke-linecap: round;
  pointer-events: none;
}

input[type="search"],
input[type="text"] {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--text);
  font: inherit;
  transition: border-color 0.15s ease, background 0.15s ease;
}

input[type="search"]:hover,
input[type="text"]:hover {
  border-color: var(--border-strong);
}

input[type="search"]:focus {
  border-color: var(--accent);
  background: var(--panel-2);
  outline: none;
}

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

/* After the shared input rule, so the shorthand above cannot reset it. */
.search input[type="search"] {
  padding-left: 2.6rem;
}

.results {
  position: absolute;
  z-index: 10;
  top: calc(100% + 0.45rem);
  right: 0;
  left: 0;
  max-height: 22rem;
  margin: 0;
  padding: 0.3rem;
  overflow-y: auto;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
  list-style: none;
}

.results li button {
  display: flex;
  gap: 0.7rem;
  align-items: center;
  width: 100%;
  padding: 0.45rem 0.5rem;
  border: 0;
  border-radius: var(--radius-sm);
  background: none;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.results li button:hover,
.results li button:focus-visible {
  background: var(--panel-hover);
}

.results img {
  flex: none;
  width: 34px;
  height: 34px;
  border-radius: 6px;
  object-fit: cover;
  background: var(--panel-hover);
}

/* -- buttons ------------------------------------------------------------- */

button {
  padding: 0.6rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel-2);
  color: var(--text);
  font: inherit;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}

button:hover {
  border-color: var(--border-strong);
  background: var(--panel-hover);
}

button.primary {
  border-color: transparent;
  background: linear-gradient(180deg, var(--accent), var(--accent-deep));
  color: #06131d;
  font-weight: 600;
}

button.primary:hover {
  filter: brightness(1.08);
}

button.ghost {
  background: none;
  color: var(--muted);
}

/* -- profile ------------------------------------------------------------- */

.profile {
  position: relative;
  flex: none;
}

.profile summary {
  display: flex;
  gap: 0.45rem;
  align-items: center;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.profile summary::-webkit-details-marker {
  display: none;
}

.profile summary:hover {
  border-color: var(--border-strong);
}

.profile[open] summary {
  border-color: var(--accent);
}

.profile-icon {
  width: 17px;
  height: 17px;
  fill: none;
  stroke: var(--muted);
  stroke-width: 2;
  stroke-linecap: round;
}

.profile-body {
  position: absolute;
  z-index: 10;
  top: calc(100% + 0.45rem);
  right: 0;
  width: min(25rem, calc(100vw - 2.5rem));
  padding: 1rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.profile-body label {
  display: block;
  margin-bottom: 0.55rem;
  font-size: 0.9rem;
  font-weight: 600;
}

.hint {
  display: block;
  margin-top: 0.25rem;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: normal;
  line-height: 1.45;
}

.profile-row {
  display: flex;
  gap: 0.4rem;
}

.profile-row input {
  flex: 1;
  min-width: 0;
}

.profile-status {
  margin: 0.65rem 0 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.profile-status.is-error {
  color: var(--danger);
}

/* -- main ---------------------------------------------------------------- */

main {
  display: flex;
  flex: 1;
  flex-direction: column;
  width: 100%;
  max-width: var(--wide);
  margin: 0 auto;
}

/* -- hero ---------------------------------------------------------------- */

.hero {
  /* Centres in whatever main has left, so the home page is not top-heavy
     with a third of the screen empty underneath. */
  margin-block: auto;
  padding: 3.5rem 0 4rem;
  text-align: center;
}

.hero h1 {
  max-width: 22ch;
  margin: 0 auto 1rem;
  font-size: clamp(1.9rem, 5vw, 2.9rem);
  font-weight: 680;
}

.hero-lead {
  max-width: 46ch;
  margin: 0 auto 2.25rem;
  color: var(--muted);
  font-size: 1.02rem;
}

.hero-examples {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  justify-content: center;
}

.hero-examples-label {
  color: var(--muted);
  font-size: 0.85rem;
}

.example {
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  font-size: 0.88rem;
}

/* -- status -------------------------------------------------------------- */

.status {
  margin: 2rem 0;
  color: var(--muted);
}

.status.is-error {
  padding: 0.95rem 1.1rem;
  border: 1px solid #5c2b2b;
  border-radius: var(--radius);
  background: #241618;
  color: var(--danger);
}

/* -- game header --------------------------------------------------------- */

.game-head {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: flex-start;
  margin-bottom: 1.75rem;
}

.game-cover {
  width: 280px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.game-meta {
  flex: 1 1 18rem;
}

.game-meta h2 {
  margin: 0 0 0.6rem;
  font-size: clamp(1.4rem, 3.5vw, 1.85rem);
}

.progress-line {
  margin: 0 0 0.5rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.progress-line strong {
  color: var(--text);
}

.progress-bar {
  height: 9px;
  margin-bottom: 1.1rem;
  overflow: hidden;
  border-radius: 999px;
  background: var(--panel-hover);
}

.progress-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--unlocked));
  transition: width 0.35s ease;
}

.notice {
  margin: 0 0 1rem;
  padding: 0.6rem 0.8rem;
  border-left: 3px solid var(--rarity-legendary);
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--rarity-legendary) 9%, transparent);
  color: var(--muted);
  font-size: 0.86rem;
}

/* -- steam links --------------------------------------------------------- */

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
}

.steam-link {
  display: inline-flex;
  gap: 0.45rem;
  align-items: center;
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel);
  color: var(--text);
  font-size: 0.86rem;
  text-decoration: none;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.steam-link:hover {
  border-color: var(--accent);
  background: var(--panel-hover);
}

.steam-link svg {
  width: 14px;
  height: 14px;
  flex: none;
  fill: none;
  stroke: var(--muted);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.steam-link:hover svg {
  stroke: var(--accent);
}

/* -- toolbar ------------------------------------------------------------- */

/*
 * Follows the top bar down the page. The offset is whatever that bar currently
 * measures - it wraps to two rows on a narrow screen - so it is published as a
 * custom property rather than guessed at here.
 */
.toolbar {
  position: sticky;
  z-index: 15;
  top: var(--topbar-height, 4.5rem);
  padding: 0.6rem 0;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(10px);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.filters {
  display: flex;
  gap: 0.4rem;
}

.chip {
  padding: 0.38rem 0.85rem;
  border-radius: 999px;
  font-size: 0.87rem;
}

.chip.is-active {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 16%, transparent);
}

.count {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
}

/* -- achievements -------------------------------------------------------- */

.achievements {
  margin: 0;
  padding: 0;
  list-style: none;
}

.achievement {
  border: 1px solid var(--border);
  border-left: 3px solid transparent;
  border-radius: var(--radius);
  margin-bottom: 0.35rem;
  background: var(--panel);
  transition: border-color 0.15s ease;
}

.achievement:hover {
  border-color: var(--border-strong);
}

/*
 * The whole row is one control.
 *
 * It used to be three stacked lines - name, description, and a button - which
 * cost 118px each and made a sixty-three achievement game eight screens long.
 * Folding it into a single line roughly halves that; the description moves
 * into the panel the row opens, where there is space to read it.
 */
.achievement-summary {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) auto auto auto;
  gap: 0 0.85rem;
  align-items: center;
  width: 100%;
  padding: 0.5rem 0.85rem;
  border: 0;
  border-radius: inherit;
  background: none;
  text-align: left;
  cursor: pointer;
}

.achievement-name {
  overflow: hidden;
  font-weight: 600;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.achievement-icon {
  width: 40px;
  height: 40px;
  border-radius: 6px;
  background: var(--panel-strong);
  object-fit: cover;
}

.achievement.is-locked .achievement-icon {
  opacity: 0.55;
}

.chevron {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: var(--muted);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 0.15s ease;
}

.achievement-summary[aria-expanded="true"] .chevron {
  transform: rotate(180deg);
}

.achievement-detail {
  padding: 0 0.85rem 0.75rem calc(40px + 1.7rem);
}

.achievement-description {
  margin: 0 0 0.6rem;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

/*
 * `display: grid` on the row above outranks the browser's own
 * `[hidden] { display: none }`, so without this the filter would update its
 * counter while changing nothing on screen.
 */
.achievement[hidden] {
  display: none;
}

.achievement.is-unlocked {
  border-left-color: var(--ok);
}

.howto-button {
  padding: 0.32rem 0.8rem;
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
  border-radius: 999px;
  color: var(--accent);
  font-size: 0.83rem;
}

.howto-button:hover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
}

.howto-button[aria-expanded="true"] {
  background: color-mix(in srgb, var(--accent) 18%, transparent);
}

/* -- rarity -------------------------------------------------------------- */

.rarity {
  display: flex;
  gap: 0.6rem;
  align-items: center;
}

/*
 * The bar is why this page exists. Sorted by rarity, the list is meant to be
 * scanned, and a column of numbers cannot be. The percentage beside it carries
 * the same information, so colour is never the only signal.
 */
.rarity-bar {
  width: 68px;
  height: 5px;
  overflow: hidden;
  border-radius: 999px;
  background: color-mix(in srgb, currentColor 16%, transparent);
}

.rarity-bar > span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: currentColor;
}

.rarity-percent {
  min-width: 3.6rem;
  font-size: 0.95rem;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.rarity-legendary { color: var(--rarity-legendary); }
.rarity-rare      { color: var(--rarity-rare); }
.rarity-uncommon  { color: var(--rarity-uncommon); }
.rarity-common    { color: var(--rarity-common); }
.rarity-unknown   { color: var(--muted); }

/* -- how-to panel -------------------------------------------------------- */

/* The panel spans the whole row rather than sitting in the text column. */
.howto {
  grid-column: 1 / -1;
  margin-top: 0.85rem;
  padding: 1rem 1.15rem;
  border: 1px solid color-mix(in srgb, var(--accent) 22%, var(--border));
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--accent) 6%, var(--panel-2));
}

.howto-lead {
  margin: 0 0 0.7rem;
  color: var(--text);
  font-size: 0.94rem;
}

.howto-steps {
  margin: 0 0 0.85rem;
  padding-left: 1.35rem;
  color: var(--text);
  font-size: 0.94rem;
}

.howto-steps li {
  margin-bottom: 0.35rem;
  padding-left: 0.2rem;
}

.howto-steps li::marker {
  color: var(--accent);
  font-weight: 600;
}

.howto-note {
  margin: 0 0 0.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.howto-sources,
.howto-disclaimer {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.5;
}

.howto-sources {
  margin-bottom: 0.35rem;
}

/* -- footer -------------------------------------------------------------- */

.footer {
  width: 100%;
  max-width: var(--wide);
  /* `auto`, genuinely: the shorthand used to say 3rem while the comment
     claimed auto, which stranded the footer mid-screen on a short page with a
     third of the viewport empty beneath it. */
  margin: auto auto 0;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.8rem;
}

/* -- narrow -------------------------------------------------------------- */

@media (width <= 40rem) {
  .topbar {
    padding: 1.1rem 0 1.25rem;
  }

  .brand-text span {
    display: none;
  }

  .profile summary span {
    display: none;
  }

  /*
   * The bar wraps here and the trigger shrinks to its icon, so anchoring the
   * panel to that trigger pushes it off the left edge. Anchoring it to the bar
   * instead lets it span the screen.
   */
  /*
   * The bar wraps to ~190px here, and sticking that to the top costs a third
   * of a phone screen permanently. It scrolls away instead; the filters below
   * stay pinned, which is what a long list actually needs within reach.
   */
  .topbar {
    position: relative;
  }

  .toolbar {
    top: 0;
  }

  .profile {
    position: static;
  }

  .profile-body {
    right: 0;
    left: 0;
    width: auto;
  }

  .hero {
    padding: 2.25rem 0 2.75rem;
  }
}

@media (width <= 34rem) {
  .achievement-summary {
    grid-template-columns: 32px minmax(0, 1fr) auto auto;
    gap: 0 0.6rem;
    padding: 0.45rem 0.6rem;
  }

  .achievement-icon {
    width: 32px;
    height: 32px;
  }

  /* The bar is the first thing to go: at this width the row needs every pixel
     for the name, and the percentage carries the same information. */
  .rarity-bar {
    display: none;
  }

  .rarity-percent {
    min-width: 3rem;
    font-size: 0.85rem;
  }

  .achievement-detail {
    padding-left: calc(32px + 1.2rem);
  }

  .game-cover {
    width: 100%;
  }
}

/* -- motion -------------------------------------------------------------- */

/*
 * Five transitions ran regardless of the system setting. None of them carries
 * meaning, so switching them off costs the page nothing.
 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* -- rarity scale note ---------------------------------------------------- */

/*
 * Sits where the percentages actually are. It used to be the footer's only
 * line, explaining a figure the home page never shows.
 */
.scale-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
}

@media (width <= 46rem) {
  .scale-note {
    display: none;
  }
}