:root {
  --bg: hsl(43, 100%, 50%);
  --bg-hot: hsl(43, 88%, 42%);
  --ink: hsl(0, 0%, 4%);
  --ink-muted: hsla(0, 0%, 4%, 0.68);
  --button-bg: hsl(0, 0%, 3%);
  --button-fg: hsl(43, 100%, 50%);
  --button-muted: hsla(43, 100%, 82%, 0.78);
  --panel: hsla(43, 95%, 45%, 0.42);
  --panel-strong: hsla(43, 88%, 42%, 0.36);
  --border: hsl(0, 0%, 5%);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'IBM Plex Mono', monospace;
  background: linear-gradient(135deg, var(--bg), hsl(43, 95%, 45%));
  color: var(--ink);
  min-height: 100vh;
  padding: 1rem;
}

.container {
  width: min(100%, 1060px);
  margin: 0 auto;
  padding: 0 0 2rem;
}

h1 {
  font-size: clamp(2.4rem, 9vw, 6rem);
  line-height: 0.9;
  font-weight: 700;
  letter-spacing: -0.08em;
  color: #fff;
  max-width: none;
  margin-bottom: 1rem;
  white-space: nowrap;
}

h2 {
  font-size: clamp(1.35rem, 4vw, 2.35rem);
  line-height: 1;
  letter-spacing: -0.05em;
  max-width: 11ch;
}

.game-card h2 {
  max-width: none;
}

.hero {
  margin-bottom: 2rem;
  max-width: 780px;
}

.eyebrow {
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 0.7rem;
}

.subtitle {
  color: var(--ink-muted);
  font-size: clamp(1rem, 3vw, 1.35rem);
  max-width: 36rem;
}

.welcome-layout {
  display: grid;
  grid-template-columns: 1fr;
  align-items: start;
  gap: 1rem;
}

.action-stack,
.panel-stack,
.link-stack {
  display: grid;
  gap: 0.65rem;
}

.action-stack {
  align-self: start;
  align-content: start;
}

.game-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 2rem;
  min-height: 25rem;
  padding: 1.2rem;
  border: 2px solid var(--border);
  background: var(--panel);
}

#market-panel {
  background: var(--panel-strong);
}

.settings-panel {
  gap: 1.4rem;
}

.game-panel[hidden] {
  display: none;
}

.panel-back {
  display: none;
  width: auto;
  margin-bottom: 1rem;
  padding: 0.55rem 0.75rem;
  font-family: inherit;
  font-size: 0.72rem;
  color: var(--button-fg);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border: 2px solid var(--button-bg);
  background: var(--button-bg);
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}

.panel-back:hover {
  transform: translate(-0.18rem, -0.18rem);
}

.card-copy {
  color: var(--ink-muted);
  max-width: 28rem;
  margin-top: 1rem;
  font-size: 0.95rem;
  line-height: 1.55;
}

.link-stack a,
.link-stack button,
.action-stack a,
.action-stack button {
  display: block;
  width: 100%;
  padding: 0.85rem 1rem;
  font-family: inherit;
  font-size: 0.9rem;
  text-align: left;
  color: var(--button-fg);
  text-decoration: none;
  border: 2px solid var(--button-bg);
  background: var(--button-bg);
  appearance: none;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}

.link-stack a:hover,
.link-stack button:hover,
.action-stack a:hover,
.action-stack button:hover {
  transform: translate(-0.18rem, -0.18rem);
}

.link-stack button:disabled,
.link-stack button:disabled:hover {
  color: var(--button-muted);
  cursor: not-allowed;
  opacity: 0.72;
  transform: none;
}

.action-stack button[aria-expanded="true"],
.action-stack a.login-link {
  outline: 2px solid var(--button-fg);
  outline-offset: -0.35rem;
}

.link-stack a .desc,
.link-stack button .desc,
.action-stack a .desc,
.action-stack button .desc {
  display: block;
  font-size: 0.72rem;
  color: var(--button-muted);
  margin-top: 0.25rem;
  line-height: 1.35;
}

.settings-stack {
  display: grid;
  gap: 0.75rem;
}

.settings-section {
  padding: 0.85rem;
  border: 2px solid var(--border);
  background: hsla(43, 100%, 50%, 0.2);
}

.settings-section h3 {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.7rem;
}

.settings-section p,
.settings-section label,
#api-keys-list {
  color: var(--ink-muted);
  font-size: 0.78rem;
  line-height: 1.45;
}

.settings-section p,
#api-keys-list {
  margin-bottom: 0.55rem;
}

.settings-section strong {
  color: var(--ink);
}

.settings-row,
.key-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.key-row {
  justify-content: space-between;
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--border);
}

.key-create-row {
  margin-top: 1rem;
}

.settings-panel input[type="text"] {
  min-width: min(100%, 12rem);
  flex: 1;
  padding: 0.55rem 0.65rem;
  font-family: inherit;
  font-size: 0.78rem;
  color: var(--button-fg);
  border: 2px solid var(--button-bg);
  background: var(--button-bg);
  outline: none;
}

.settings-panel input[type="text"]:focus {
  outline: 2px solid var(--button-fg);
  outline-offset: 0.1rem;
}

.settings-panel input[type="text"]::placeholder {
  color: var(--button-muted);
}

.settings-panel .btn {
  display: inline-block;
  padding: 0.55rem 0.75rem;
  font-family: inherit;
  font-size: 0.72rem;
  color: var(--button-fg);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border: 2px solid var(--button-bg);
  background: var(--button-bg);
  cursor: pointer;
}

.settings-panel .btn:hover {
  color: var(--button-bg);
  background: var(--button-fg);
}

.settings-panel .btn-danger {
  color: hsl(0, 72%, 48%);
}

.settings-panel .btn-danger:hover {
  color: #fff;
  background: hsl(0, 72%, 42%);
}

.settings-panel .btn-danger:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.settings-panel .btn-danger:disabled:hover {
  color: hsl(0, 72%, 48%);
  background: var(--button-bg);
}

.api-key {
  padding: 0.65rem;
  color: var(--button-fg);
  word-break: break-all;
  border: 2px solid var(--button-bg);
  background: var(--button-bg);
}

#new-key-display {
  display: none;
  margin-top: 0.85rem;
}

.success {
  color: hsl(120, 42%, 28%);
}

.error,
.danger-zone h3,
#delete-feedback {
  color: hsl(0, 72%, 42%);
}

.danger-zone {
  border-color: hsl(0, 72%, 42%);
}

@media (max-width: 759px) {
  .welcome-layout:not(.is-panel-open) .panel-stack,
  .welcome-layout.is-panel-open .action-stack {
    display: none;
  }

  .welcome-layout:not(.is-panel-open) .action-stack button[aria-expanded="true"] {
    outline: none;
  }

  .panel-back {
    display: inline-block;
  }
}

@media (min-width: 760px) {
  body {
    padding: 2rem;
  }

  .container {
    padding: 0 0 4rem;
  }

  .hero {
    margin-bottom: 3rem;
  }

  .welcome-layout {
    grid-template-columns: minmax(14rem, 0.85fr) minmax(0, 1.35fr);
    gap: 1.4rem;
  }

  .game-card {
    padding: 1.5rem;
  }

  .link-stack a,
  .link-stack button,
  .action-stack a,
  .action-stack button {
    padding: 1rem 1.15rem;
  }
}