:root {
  --color-bg: #434;
  --color-panel: #323;
  --color-ink: #ddd;
  --color-ink-muted: #aaa;
  --color-border: #b0b;
  --color-accent: #fd0;

  /* primary action — wood/dice amber */
  --color-btn: #096;

  --font-display: 'Roboto Slab', Georgia, serif;
  --font-body: 'Inter', system-ui, sans-serif;

  --radius: 8px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 2.5rem 1.5rem;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  line-height: 1.5;
}

.app-shell {
  max-width: 640px;
  margin: 0 auto;
}

header.app-header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
}

header.app-header h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.75rem;
  margin: 0 0 0.25rem;
  letter-spacing: 0.01em;
}

header.app-header p {
  margin: 0;
  color: var(--color-ink-muted);
  font-size: 0.95rem;
}

#form-container {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.pair-row {
  display: grid;
  grid-template-columns: 1.6rem 1fr 1fr;
  gap: 0.75rem;
  align-items: start;
  background: var(--color-panel);
  border-radius: var(--radius);
  padding: 0.9rem;
  position: relative;
}

.pair-row>.text-field {
  min-width: 0;
  /* overrides grid items' default min-width:auto, which
otherwise floors shrinkage at the input's content
size regardless of the row's actual available width */
}

.pair-row::before {
  content: attr(data-index);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-panel);
  background: color-mix(in srgb, var(--color-panel) 65%, white);
  border-radius: 999px;
  width: 1.6rem;
  height: 1.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.text-field {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.text-field label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}

.text-field input {
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 0.5rem 0.6rem;
  border-radius: 4px;
  background: white;
  color: #000;
}

.text-field input:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: -1px;
}

.char-warning {
  font-size: 0.75rem;
  color: var(--color-accent);
}

.add-pair-btn,
.create-btn,
#download-btn {
  font-family: var(--font-body);
  font-weight: 600;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  background: var(--color-btn);
  color: white;
}

.add-pair-btn {
  grid-column: 1 / -1;
  justify-self: center;
  margin-top: 0.4rem;
  width: 2.25rem;
  height: 2.25rem;
  font-size: 1.25rem;

}

.add-pair-btn:disabled {
  background: var(--color-bg);
  color: var(--color-ink-muted);
  cursor: auto;
}

.create-btn,
#download-btn {
  padding: 0.75rem 1.25rem;
  font-size: 1rem;
  width: 155px;
}

.create-btn {
  margin-top: 0.5rem;
  align-self: flex-start;
}

.create-btn:disabled {
  background: var(--color-panel);
  color: var(--color-ink-muted);
  cursor: default;
}

#download-btn {
  display: block;
}

.add-pair-btn:hover:not(:disabled),
.create-btn:hover:not(:disabled),
#download-btn:hover {
  background: var(--color-accent);
  color: black;
}

#output-panel {
  margin-top: 2rem;
  padding: 1rem;
  background: var(--color-panel);
  border: 1px dashed var(--color-btn);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.85rem;
  white-space: pre-wrap;
  color: var(--color-ink-muted);
}

#output-panel svg {
  display: block;
  width: 100%;
  height: auto;
}

.theme-section {
  margin-top: 1.5rem;

}

.theme-label {
  margin: 0 0 0.5rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);

}

.theme-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  /* narrow screens: download button drops below the swatches instead of squeezing */

}

.theme-options {
  display: flex;
  gap: 0.75rem;

}

.theme-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  font-family: var(--font-body);
  color: var(--color-ink-muted);

}

.theme-swatch {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius);
  border: 3px solid var(--color-panel);
  overflow: hidden;
  display: block;

}

.theme-swatch:hover {
  border-color: var(--color-accent);
}

.theme-btn.is-selected .theme-swatch {
  border-color: var(--color-btn);
}

.theme-btn.is-selected {
  color: var(--color-ink);
}

.theme-btn-label {
  font-size: 0.75rem;
}

.file-note {
  margin: 2rem 0 0;
  font-size: 0.8rem;
  color: var(--color-ink-muted);
  text-align: center;

}