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

html {
  height: 100%;
  width: 100%;
  overflow-x: hidden;
  scroll-behavior: smooth;
}

.hidden {
  display: none;
}

main {
  flex: 1;
  display: flex;
}

body {
  font-family: "Roboto", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  background-color: #f0f0f0;
  margin: 0;
  padding: 0;
  padding-right: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  height: 100%;
}

.page-title {
  font-size: 1.5em;
  font-weight: 600;
  color: #1a1f36;
  margin: 0 0 16px 8px;
  letter-spacing: 0.5px;
  font-family: "Yu Mincho", "游明朝", "Hiragino Mincho ProN", "ヒラギノ明朝 ProN W3", "ＭＳ Ｐ明朝", serif;
  padding-bottom: 6px;
}

.visually-hidden {
  position: absolute;
  left: -9999px;
}

.content {
  flex: 1;
  padding: 20px;
  max-width: 1100px;
  margin: 0 auto;
  background: #fff;
}

.zone-help {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin: 10px 0;
  margin-bottom: 20px;
  padding: 6px 12px;
  border: 1px solid #ccc;
  background-color: #f9f9f9;
  cursor: pointer;
}

.zone-help:hover {
  background-color: #eee;
}

input[type="text"],
input[type="number"],
select {
  width: 100%;
  max-width: 200px;
  padding: 8px 12px;
  font-family: "Roboto", "Helvetica Neue", "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  border: 1px solid #ccc;
  border-radius: 6px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  box-sizing: border-box;
  margin: 4px 0;
}

input[type="text"]:focus,
input[type="number"]:focus,
select:focus {
  border-color: #0078d7;
  box-shadow: 0 0 4px rgba(0, 120, 215, 0.3);
}

select {
  background-color: #fff;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  padding-right: 28px;
  background-image: url("data:image/svg+xml;utf8,<svg fill='gray' height='16' viewBox='0 0 24 24' width='16' xmlns='http://www.w3.org/2000/svg'><path d='M7 10l5 5 5-5z'/></svg>");
  background-repeat: no-repeat;
  background-position: right 8px center;
  background-size: 16px;
}

select::-ms-expand {
  display: none;
}

fieldset {
  border: 1px solid #ccc;
  padding: 10px 15px;
  margin-bottom: 15px;
  border-radius: 6px;
}

fieldset label {
  display: block;
  align-items: center;
  margin-right: 10px;
}

fieldset.closed {
  padding: 0;
  margin-bottom: 5px;
  border-width: 0;
  max-height: 1.5em;
}

fieldset label,
fieldset p {
  transition: opacity 0.3s ease;
}

fieldset.closed label,
fieldset.closed p {
  opacity: 0;
  pointer-events: none;
}

legend {
  padding: 0 8px;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

fieldset input[type="checkbox"] {
  margin-right: 4px;
}

label:has(> input[type="checkbox"]),
label:has(> input[type="radio"]) {
  display: inline-flex;
  align-items: center;
}

label>input[type="checkbox"],
label>input[type="radio"] {
  margin-right: 0.4em;
}

input[type="radio"],
input[type="checkbox"],
label:has(input[type="radio"]),
label:has(input[type="checkbox"]),
select {
  cursor: pointer;
}

.zone-block {
  padding: 12px;
  margin-bottom: 16px;
  border: 1px solid #ddd;
  border-radius: 6px;
  background: #fafafa;
}

.notice {
  background: #fff6e5;
  border-left: 4px solid #f0a500;
  padding: 8px;
  font-size: 0.9em;
}

#result {
  margin-top: 20px;
  padding: 12px;
  border: 2px solid #4caf50;
  background: #f3fff5;
}

#zone-abilities:disabled {
  background: #f3f3f3;
  color: #999;
}

#zone-settings {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

#zone-settings fieldset:nth-of-type(1),
#zone-settings fieldset:nth-of-type(3) {
  min-height: 100px;
}

#zone-settings fieldset:nth-of-type(2),
#zone-settings fieldset:nth-of-type(4) {
  min-height: 155px;
}

.column {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

#zone-settings fieldset {
  margin-top: 0;
}

#zone-settings .column>fieldset+fieldset {
  margin-top: 0px;
}

#zone-ability-chars {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.zone-char {
  display: flex;          /* ← 横並び化 */
  align-items: center;    /* ← 縦中央揃え */
  gap: 6px;
  font-size: 12px;
  padding: 2px 6px;
  border-radius: 6px;
  background: #f3f3f3;
}

.zone-char img {
  width: 32px;
  height: 32px;
  display: block;
}

@media (max-width: 600px) {
  .content {
    padding: 12px;
  }
}

@media (min-width: 900px) {
  #zone-settings {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }


}

@media (max-width: 900px) {
  fieldset {
    margin-bottom: 8px;
  }

  #result {
    margin-top: 12px;
    padding: 10px;
  }

  #zone-settings {
    gap: 12px;
  }

  #zone-settings fieldset:nth-of-type(1),
  #zone-settings fieldset:nth-of-type(2),
  #zone-settings fieldset:nth-of-type(3),
  #zone-settings fieldset:nth-of-type(4) {
    min-height: auto;
  }

  .column {
    gap: 12px;
  }

  h3 {
    font-size: 16px;
  }
}

@media (max-width: 460px) {
  .page-title {
    margin: 0 0 8px 0;
    text-align: center;
  }

  h3 {
    font-size: 14px;
  }
}