:root {
  --primary: #1e90ff;
  --primary-light: #e6f7ff;
  --primary-dark: #005cb8;
  --text-color: #333;
  --bg-color: #f0f8ff;

  --kanji-font-mincho: "Yu Mincho", serif;
  --kanji-font-gothic: "Yu Gothic UI", "Meiryo", sans-serif;
  --kanji-font: var(--kanji-font-mincho);
}

html[data-theme="dark"] {
  --primary-light: #1e3a5f;
  --primary-dark: #60a5fa;
  --text-color: #e2e8f0;
  --bg-color: #0f172a;
}

html[data-theme="dark"] .container {
  background: #1e293b;
}

html[data-theme="dark"] .input-area input {
  background: #1e3a5f;
  border-color: #1e90ff;
  color: #e2e8f0;
}

html[data-theme="dark"] #kanji-info-table tr:nth-child(even) td {
  background: #1e3a5f;
}

html[data-theme="dark"] #kanji-info-table tr:hover td {
  background: rgba(30,144,255,0.2);
}

html[data-theme="dark"] .Clockbutton {
  background-color: #1e293b;
  border-color: #94a3b8;
  color: #e2e8f0;
}

html[data-theme="dark"] .Clockbutton:hover {
  background-color: #334155;
  color: #e2e8f0;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 20px;
  background: var(--bg-color);
  font-family: "Segoe UI", sans-serif;
  color: var(--text-color);
}

.container {
  max-width: 600px;
  margin: 0 auto;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  padding: 24px;
}

h1 {
  margin: 0 0 24px;
  font-size: 1.8rem;
  color: var(--primary-dark);
  text-align: center;
  border-bottom: 2px solid var(--primary);
  padding-bottom: 8px;
}

.input-area {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}

.input-area input {
  flex: 1;
  padding: 8px 12px;
  font-size: 1rem;
  border: 2px solid var(--primary-light);
  border-radius: 4px;
  background: var(--primary-light);
  transition: border-color .2s;
}

.input-area input:focus {
  outline: none;
  border-color: var(--primary);
}

.input-area button {
  padding: 8px 16px;
  font-size: 1rem;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background .2s;
}

.input-area button:hover {
  background: var(--primary-dark);
}

.selection-area {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px;
  margin-bottom: 16px;
  background: var(--primary-light);
  border: 1px dashed var(--primary);
  border-radius: 4px;
}

.kanji-selection {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.font-selection {
  display: flex;
  gap: 12px;
}

.selection-area label {
  display: flex;
  align-items: center;
  font-weight: 500;
  color: var(--primary-dark);
  cursor: pointer;
}

.selection-area input[type="radio"] {
  margin-right: 6px;
  accent-color: var(--primary);
  width: 16px;
  height: 16px;
}

#confirm-btn {
  display: block;
  margin: 0 auto 24px;
  padding: 8px 20px;
  font-size: 1rem;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background .2s;
}

#confirm-btn:disabled {
  opacity: .5;
  cursor: not-allowed;
}

#confirm-btn:not(:disabled):hover {
  background: var(--primary-dark);
}

.display-area {
  text-align: center;
  margin-bottom: 24px;
}

.kanji-char {
  display: inline-block;
  padding: 10px;
  font-size: 48px;
  min-width: 80px;
  min-height: 80px;
  font-family: var(--kanji-font);
  background: var(--primary-light);
  border: 2px solid var(--primary);
  border-radius: 6px;
  transition: font-size .1s ease, font-family .2s;
}

.display-area label {
  display: block;
  margin: 12px 0 4px;
  font-weight: 500;
  color: var(--primary-dark);
}

.display-area input[type="range"] {
  width: 100%;
  accent-color: var(--primary);
}

#kanji-info-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .95rem;
}

#kanji-info-table th,
#kanji-info-table td {
  border: 1px solid var(--primary-light);
  padding: 10px;
}

#kanji-info-table th {
  background: var(--primary);
  color: #fff;
  text-align: left;
  width: 30%;
}

#kanji-info-table tr:nth-child(even) td {
  background: var(--primary-light);
}

#kanji-info-table tr:hover td {
  background: rgba(30,144,255,0.1);
}

.Clockbutton{
  background-color: #fff;
  border: solid 2px #2f4f4f;
  color: #2f4f4f;
  padding: 10px 30px;
  text-decoration: none;
  font-size: 1em;
}
.Clockbutton:hover {
  color: #2f4f4f;
  background-color: #b0e0e6;
}