:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1e222b;
  --fg: #e6e8ec;
  --muted: #8a93a6;
  --accent: #f5c26b;
  --accent-2: #7cc4ff;
  --border: #272b35;
  --sortable: #9ae6b4;
  --not-sortable: #ff9ec7;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans",
    "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  font-size: 15px;
  line-height: 1.6;
}

header {
  padding: 24px 32px 8px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--border);
}
header h1 { margin: 0; font-size: 22px; }
header #subtitle {
  grid-column: 1 / 2;
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 14px;
}
.lang-switch {
  grid-column: 2 / 3;
  grid-row: 1 / 3;
  display: flex;
  align-items: center;
  gap: 6px;
}

main {
  padding: 28px 32px 48px;
  max-width: 1200px;
  margin: 0 auto;
}

.controls {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 24px;
}

button, select, input[type="checkbox"] {
  font-family: inherit;
}

#generate-btn {
  padding: 10px 20px;
  background: var(--accent);
  color: #0b1320;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
#generate-btn:hover { filter: brightness(1.1); }

.auto-check {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
  cursor: pointer;
}
.auto-check input {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
}

select {
  padding: 8px 10px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--fg);
  font-size: 13px;
}

.cards {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 22px;
  position: relative;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
  flex-wrap: wrap;
  gap: 10px;
}

.card h2 {
  margin: 0;
  font-size: 18px;
  color: var(--accent);
  font-weight: 700;
}

.card-meta {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.badge {
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
}
.badge.sortable {
  color: var(--sortable);
  border-color: var(--sortable);
}
.badge.not-sortable {
  color: var(--not-sortable);
  border-color: var(--not-sortable);
}

.card-value {
  margin: 0 0 14px;
  padding: 12px 14px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 14px;
  color: var(--accent-2);
  overflow-x: auto;
  white-space: nowrap;
}

.copy-btn {
  position: absolute;
  top: 20px;
  right: 22px;
  padding: 4px 10px;
  font-size: 11px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--muted);
  cursor: pointer;
  display: none; /* Shown via ::before of header to avoid clutter; actually show via below */
}
/* Actually show the copy button. */
.copy-btn { display: inline-block; }
.copy-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.card-description {
  margin: 0 0 6px;
  color: var(--fg);
  font-size: 13px;
  line-height: 1.55;
}

.card-alphabet {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-family: "SF Mono", Menlo, Consolas, monospace;
}

footer {
  padding: 24px 32px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

@media (max-width: 600px) {
  header, main, footer { padding-left: 18px; padding-right: 18px; }
}