/* イラストの輪郭と淡い紙の質感を合わせる。 */
.capsule-paper {
  --paper-ink: #353d46;
  --paper-blue: #376285;
  --paper-yellow: #ffdc75;
  --paper-coral: #f2b5a5;
  --paper-green: #c6dfb2;
  --paper-sky: #b9d9e8;
  overflow-x: hidden;
  padding: 32px;
  color: var(--paper-ink);
  border: 2px solid var(--paper-ink);
  border-radius: 16px 16px 6px 6px;
  background-color: #fffdf6;
  background-image: linear-gradient(#fffdf6c9, #fffdf6c9), url("../images/capsule-paper-texture.png");
  background-size: 100% 100%;
  background-repeat: no-repeat;
  box-shadow: 5px 6px 0 rgba(53, 61, 70, 0.18);
}

.instruction-sheet.capsule-paper { width: min(660px, 100%); }
.rules-backdrop { background: rgba(45, 53, 61, 0.16); backdrop-filter: blur(3px); }
.capsule-paper .sr-only { width: 1px; height: 1px; min-height: 0; padding: 0; border: 0; }

.paper-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-right: 12px;
  margin-bottom: 24px;
}
.paper-heading > div { min-width: 0; }
.capsule-paper .sheet-kicker {
  width: fit-content;
  margin: 0 0 12px;
  padding: 4px 10px;
  border-radius: 4px;
  background: #f8e9cf;
  color: #635447;
  font-size: 11px;
  font-weight: 700;
  line-height: 1.6;
}
.capsule-paper h2 {
  margin: 0;
  font-family: "Hiragino Maru Gothic ProN", "Yu Gothic", system-ui, sans-serif;
  font-size: 26px;
  font-weight: 800;
  line-height: 1.5;
  letter-spacing: 0.02em;
}
.paper-capsule { flex: 0 0 auto; width: 64px; height: 64px; object-fit: contain; transform: rotate(12deg); pointer-events: none; }
.capsule-paper .icon-close {
  top: 6px; right: 6px; width: 44px; height: 44px;
  border: 0; color: var(--paper-ink); background: transparent; font-size: 24px;
}

.capsule-paper .tabs { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-bottom: 24px; }
.capsule-paper .tab {
  --type-color: var(--paper-coral);
  position: relative;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px;
  min-height: 80px;
  padding: 10px 4px;
  border: 2px solid #a7a29a;
  border-radius: 12px;
  color: var(--paper-ink);
  background: color-mix(in srgb, var(--type-color) 35%, #fffdf7);
  font-size: 14px;
  font-weight: 800;
  transition: background-color 120ms ease, transform 120ms ease;
}
.capsule-paper .tab[data-share-type="image"] { --type-color: var(--paper-green); }
.capsule-paper .tab[data-share-type="link"] { --type-color: var(--paper-sky); }
.capsule-paper .tab[data-share-type="question"] { --type-color: var(--paper-yellow); }
.type-icon { width: 28px; height: 28px; }
.capsule-paper .tab.is-active { border-color: var(--paper-ink); background: var(--type-color); box-shadow: 0 3px 0 var(--paper-ink); }
.capsule-paper .tab.is-active::after { content: "✓"; position: absolute; top: 4px; right: 8px; font-size: 12px; }

.capsule-paper .share-form label,
.capsule-paper .pool-fieldset legend { font-size: 13px; font-weight: 800; }
.capsule-paper textarea,
.capsule-paper input[type="text"]:not(.sr-only),
.capsule-paper input[type="url"] {
  display: block;
  padding: 14px;
  border: 1.5px solid #aaa69d;
  border-radius: 10px;
  color: var(--paper-ink);
  background: #fffefb;
  background-image: none;
  font-size: 15px;
  line-height: 1.8;
}
.capsule-paper textarea { min-height: 132px; }
.capsule-paper input[type="text"]:not(.sr-only), .capsule-paper input[type="url"] { padding: 10px 12px; line-height: 1.5; }
.capsule-paper .type-panel[data-type-panel="link"] textarea { margin-bottom: 14px; }
.capsule-paper textarea::placeholder { color: #77776f; }
.capsule-paper :is(textarea, input[type="text"], input[type="url"]):focus-visible { outline: 2px solid var(--paper-blue); outline-offset: 2px; border-color: var(--paper-blue); box-shadow: none; }
.capsule-paper .field-rule { margin-top: 8px; font-size: 11px; }
.capsule-paper .field-help { font-size: 12px; }
.capsule-paper .share-form .upload-dropzone { display: grid; margin-top: 12px; border-radius: 10px; border-color: #89957f; background: #f2f7e9; }

.capsule-paper .pool-fieldset { margin: 24px 0; padding: 0; border: 0; }
.capsule-paper .pool-fieldset legend { margin-bottom: 12px; }
.capsule-paper .pool-options { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 8px; }
.capsule-paper .pool-options label {
  --pool-color: var(--paper-yellow);
  position: relative;
  display: flex;
  justify-content: center;
  gap: 6px;
  min-height: 44px;
  margin: 0;
  padding: 8px 4px;
  border: 1.5px solid #aaa69d;
  border-radius: 8px;
  color: var(--paper-ink);
  background: #fffdf7;
  font-size: 11px;
  font-weight: 700;
}
.capsule-paper .pool-options label:has(input[value="text"]) { --pool-color: var(--paper-coral); }
.capsule-paper .pool-options label:has(input[value="image"]) { --pool-color: var(--paper-green); }
.capsule-paper .pool-options label:has(input[value="link"]) { --pool-color: var(--paper-sky); }
.capsule-paper .pool-options label:has(input[value="question"]) { --pool-color: var(--paper-yellow); }
.capsule-paper .pool-options label::before {
  content: ""; display: inline-grid; place-items: center; flex: 0 0 14px;
  width: 14px; height: 14px; border: 1.5px solid #8b8d8e; border-radius: 50%; background: #fffefb;
  font-size: 10px; line-height: 1;
}
.capsule-paper .pool-options input { position: absolute; width: 1px; height: 1px; margin: 0; opacity: 0; pointer-events: none; }
.capsule-paper .pool-options label:has(input:checked) { border-color: var(--paper-ink); background: var(--pool-color); box-shadow: 0 2px 0 var(--paper-ink); }
.capsule-paper .pool-options label:has(input:checked)::before { content: "✓"; border-color: var(--paper-ink); color: #fff; background: var(--paper-ink); }
.capsule-paper .pool-options label:has(input:focus-visible),
.capsule-paper :is(.tab, .primary-action, .icon-close):focus-visible { outline: 2px solid var(--paper-blue); outline-offset: 4px; }
.capsule-paper .primary-action {
  min-height: 52px;
  border: 2px solid var(--paper-ink);
  border-radius: 10px;
  color: var(--paper-ink);
  background: var(--paper-yellow);
  box-shadow: 0 4px 0 var(--paper-ink);
  font-size: 16px;
  font-weight: 800;
}
.capsule-paper .primary-action::after { content: "→"; margin-left: 12px; font-size: 22px; }
.capsule-paper .primary-action:not(:disabled):active { transform: translateY(3px); box-shadow: 0 1px 0 var(--paper-ink); }
@media (hover: hover) {
  .capsule-paper .tab:not(.is-active):hover { border-color: var(--paper-ink); background: var(--type-color); transform: translateY(-1px); }
  .capsule-paper .pool-options label:not(:has(input:checked)):hover { border-color: var(--paper-ink); background: var(--pool-color); }
  .capsule-paper .primary-action:not(:disabled):hover { background: #ffcf4c; }
  .capsule-paper .icon-close:hover { background: #f8e9cf; }
}

.rules-sheet.capsule-paper { width: min(680px, 100%); }
.rules-sheet.capsule-paper h2 { font-size: 24px; }
.capsule-paper .rules-content { gap: 24px; counter-reset: paper-section; }
.capsule-paper .rules-section { border: 0; border-top: 1px solid #ded8cb; border-radius: 0; padding: 20px 0 0; background: transparent; }
.capsule-paper .rules-section:first-child { border-top: 0; padding-top: 0; }
.capsule-paper .rules-section h3 { display: flex; align-items: center; gap: 10px; }
.capsule-paper .rules-section h3::before {
  counter-increment: paper-section;
  content: counter(paper-section, decimal-leading-zero);
  display: inline-grid; place-items: center; flex: 0 0 28px;
  width: 28px; height: 28px; border: 1.5px solid var(--paper-ink); border-radius: 50%;
  color: var(--paper-ink); background: var(--paper-yellow); font-size: 11px; font-weight: 800;
}
.capsule-paper .rules-section:nth-child(3n + 2) h3::before { background: var(--paper-green); }
.capsule-paper .rules-section:nth-child(3n) h3::before { background: var(--paper-sky); }
.capsule-paper .rules-section li::marker { color: var(--paper-ink); }

@media (max-width: 640px) {
  .paper-heading { display: grid; grid-template-columns: minmax(0, 1fr) 44px; gap: 12px; padding-top: 16px; padding-right: 0; margin-bottom: 20px; }
  .paper-heading > div { display: contents; }
  .capsule-paper h2 { grid-column: 1 / -1; grid-row: 2; font-size: clamp(20px, 5.5vw, 26px); }
  .capsule-paper .sheet-kicker { margin: 0; }
  .paper-capsule { grid-column: 2; grid-row: 1; width: 44px; height: 44px; }
  .capsule-paper .tabs { gap: 8px; }
  .capsule-paper .tab { min-height: 68px; font-size: 13px; }
  .type-icon { width: 24px; height: 24px; }
  .capsule-paper .pool-options { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .capsule-paper .pool-options label { font-size: 12px; }
  .capsule-paper .pool-options label:first-child { grid-column: 1 / -1; }
}
@media (max-width: 520px) {
  .instruction-sheet.capsule-paper, .rules-sheet.capsule-paper { padding: 24px 20px 28px; }
  .rules-sheet.capsule-paper { max-height: calc(100dvh - 36px); }
  .capsule-paper .sheet-kicker { font-size: 10px; padding: 4px 6px; }
  .rules-sheet.capsule-paper h2 { font-size: 20px; }
  .capsule-paper .primary-action { font-size: 14px; }
}
@media (prefers-reduced-motion: reduce) {
  .capsule-paper .tab { transition: none; }
  .capsule-paper .tab:not(.is-active):hover { transform: none; }
}