#lucky-day-calendar-tool {
  --klc-main: #3f6f66;
  --klc-main-dark: #315a52;
  --klc-main-soft: #e8f0ed;
  --klc-bg: #fbfaf7;
  --klc-card: #ffffff;
  --klc-text: #26332f;
  --klc-muted: #66736f;
  --klc-border: #d9e2de;
  --klc-shadow: 0 12px 32px rgba(43, 72, 65, 0.09);
  --klc-danger: #a54d4d;
  --klc-danger-soft: #fff0f0;
  --klc-focus: #8bb9ae;
  box-sizing: border-box;
  width: 100%;
  max-width: 920px;
  margin: 0 auto;
  padding: clamp(18px, 4vw, 36px);
  border: 1px solid var(--klc-border);
  border-radius: 24px;
  background: var(--klc-bg);
  color: var(--klc-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.7;
}

#lucky-day-calendar-tool,
#lucky-day-calendar-tool * {
  box-sizing: border-box;
}

#lucky-day-calendar-tool[data-theme="dark"] {
  --klc-main: #8fc1b6;
  --klc-main-dark: #acd3ca;
  --klc-main-soft: #253d38;
  --klc-bg: #17211f;
  --klc-card: #202d2a;
  --klc-text: #edf4f1;
  --klc-muted: #b4c2be;
  --klc-border: #3a4d48;
  --klc-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
  --klc-danger: #ffb5b5;
  --klc-danger-soft: #442b2b;
  --klc-focus: #b8ddd4;
}

#lucky-day-calendar-tool .klc-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 22px;
}

#lucky-day-calendar-tool .klc-header-copy {
  min-width: 0;
}

#lucky-day-calendar-tool .klc-brand {
  margin: 0 0 4px;
  color: var(--klc-main);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

#lucky-day-calendar-tool .klc-brand span {
  color: var(--klc-muted);
  font-weight: 500;
}

#lucky-day-calendar-tool .klc-title {
  margin: 0;
  color: var(--klc-text);
  font-size: clamp(25px, 5vw, 36px);
  font-weight: 750;
  letter-spacing: 0.01em;
  line-height: 1.35;
}

#lucky-day-calendar-tool .klc-lead {
  max-width: 650px;
  margin: 10px 0 0;
  color: var(--klc-muted);
  font-size: 15px;
}

#lucky-day-calendar-tool .klc-theme-button {
  flex: 0 0 auto;
  min-height: 42px;
  margin: 0;
  padding: 8px 14px;
  border: 1px solid var(--klc-border);
  border-radius: 999px;
  background: var(--klc-card);
  color: var(--klc-text);
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}

#lucky-day-calendar-tool .klc-theme-button:hover {
  border-color: var(--klc-main);
  color: var(--klc-main-dark);
}

#lucky-day-calendar-tool .klc-note {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 22px;
  padding: 13px 16px;
  border-radius: 14px;
  background: var(--klc-main-soft);
  color: var(--klc-text);
}

#lucky-day-calendar-tool .klc-note-icon {
  display: inline-grid;
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 50%;
  background: var(--klc-main);
  color: var(--klc-bg);
  font-size: 13px;
  font-weight: 800;
}

#lucky-day-calendar-tool .klc-note p {
  margin: 0;
  font-size: 14px;
}

#lucky-day-calendar-tool .klc-tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
  margin: 0;
  padding: 5px;
  border-radius: 14px;
  background: var(--klc-main-soft);
}

#lucky-day-calendar-tool .klc-tab {
  min-height: 46px;
  margin: 0;
  padding: 8px 16px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--klc-muted);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

#lucky-day-calendar-tool .klc-tab.is-active {
  background: var(--klc-card);
  color: var(--klc-main-dark);
  box-shadow: 0 3px 12px rgba(39, 75, 66, 0.1);
}

#lucky-day-calendar-tool .klc-settings-card {
  margin-top: 12px;
  padding: clamp(18px, 4vw, 26px);
  border: 1px solid var(--klc-border);
  border-radius: 18px;
  background: var(--klc-card);
  box-shadow: var(--klc-shadow);
}

#lucky-day-calendar-tool .klc-period-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

#lucky-day-calendar-tool .klc-period-panel[hidden] {
  display: none;
}

#lucky-day-calendar-tool .klc-field {
  display: grid;
  flex: 1 1 180px;
  gap: 6px;
  min-width: 0;
}

#lucky-day-calendar-tool .klc-field-label,
#lucky-day-calendar-tool .klc-filter-fieldset legend {
  color: var(--klc-text);
  font-size: 14px;
  font-weight: 700;
}

#lucky-day-calendar-tool .klc-select-wrap {
  position: relative;
  display: block;
}

#lucky-day-calendar-tool .klc-select-wrap::after {
  position: absolute;
  top: 50%;
  right: 15px;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--klc-main);
  border-bottom: 2px solid var(--klc-main);
  content: "";
  pointer-events: none;
  transform: translateY(-70%) rotate(45deg);
}

#lucky-day-calendar-tool .klc-field select {
  width: 100%;
  min-height: 48px;
  margin: 0;
  padding: 9px 42px 9px 14px;
  border: 1px solid var(--klc-border);
  border-radius: 10px;
  background: var(--klc-bg);
  color: var(--klc-text);
  font: inherit;
  font-size: 16px;
  appearance: none;
}

#lucky-day-calendar-tool .klc-filter-fieldset {
  min-width: 0;
  margin: 22px 0 0;
  padding: 0;
  border: 0;
}

#lucky-day-calendar-tool .klc-filter-fieldset legend {
  margin-bottom: 10px;
  padding: 0;
}

#lucky-day-calendar-tool .klc-filter-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

#lucky-day-calendar-tool .klc-check {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 42px;
  padding: 7px 12px;
  border: 1px solid var(--klc-border);
  border-radius: 999px;
  background: var(--klc-bg);
  color: var(--klc-text);
  font-size: 14px;
  cursor: pointer;
}

#lucky-day-calendar-tool .klc-check:has(input:checked) {
  border-color: var(--klc-main);
  background: var(--klc-main-soft);
}

#lucky-day-calendar-tool .klc-check input {
  width: 17px;
  height: 17px;
  margin: 0;
  accent-color: var(--klc-main);
}

#lucky-day-calendar-tool .klc-submit {
  width: 100%;
  min-height: 50px;
  margin: 22px 0 0;
  padding: 11px 18px;
  border: 0;
  border-radius: 12px;
  background: var(--klc-main);
  color: #fff;
  font: inherit;
  font-size: 16px;
  font-weight: 750;
  cursor: pointer;
  box-shadow: 0 7px 16px rgba(52, 97, 86, 0.2);
}

#lucky-day-calendar-tool[data-theme="dark"] .klc-submit {
  color: #10201c;
}

#lucky-day-calendar-tool .klc-submit:hover {
  filter: brightness(0.94);
}

#lucky-day-calendar-tool .klc-message {
  margin: 18px 0 0;
  padding: 13px 16px;
  border: 1px solid var(--klc-danger);
  border-radius: 12px;
  background: var(--klc-danger-soft);
  color: var(--klc-danger);
  font-size: 14px;
  font-weight: 700;
}

#lucky-day-calendar-tool .klc-results {
  margin-top: 28px;
}

#lucky-day-calendar-tool .klc-results-title {
  margin: 0 0 14px;
  color: var(--klc-text);
  font-size: clamp(21px, 4vw, 27px);
  font-weight: 750;
  line-height: 1.4;
}

#lucky-day-calendar-tool .klc-result-summary {
  margin: -7px 0 18px;
  color: var(--klc-muted);
  font-size: 14px;
}

#lucky-day-calendar-tool .klc-month-list {
  display: grid;
  gap: 14px;
}

#lucky-day-calendar-tool .klc-month-card {
  overflow: hidden;
  border: 1px solid var(--klc-border);
  border-radius: 16px;
  background: var(--klc-card);
}

#lucky-day-calendar-tool .klc-month-title {
  margin: 0;
  padding: 12px 16px;
  border-bottom: 1px solid var(--klc-border);
  background: var(--klc-main-soft);
  color: var(--klc-main-dark);
  font-size: 17px;
  font-weight: 750;
}

#lucky-day-calendar-tool .klc-day-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

#lucky-day-calendar-tool .klc-day-item {
  display: grid;
  grid-template-columns: minmax(124px, auto) 1fr;
  gap: 14px;
  padding: 13px 16px;
}

#lucky-day-calendar-tool .klc-day-item + .klc-day-item {
  border-top: 1px solid var(--klc-border);
}

#lucky-day-calendar-tool .klc-date {
  color: var(--klc-text);
  font-weight: 700;
  white-space: nowrap;
}

#lucky-day-calendar-tool .klc-labels {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

#lucky-day-calendar-tool .klc-badge {
  display: inline-flex;
  align-items: center;
  min-height: 27px;
  padding: 3px 9px;
  border: 1px solid var(--klc-border);
  border-radius: 999px;
  color: var(--klc-text);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.4;
}

#lucky-day-calendar-tool .klc-badge--ichiryumanbai {
  border-color: #d7b75f;
  background: #fff7d8;
  color: #654e0e;
}

#lucky-day-calendar-tool .klc-badge--tensha {
  border-color: #d99775;
  background: #fff0e7;
  color: #71391d;
}

#lucky-day-calendar-tool .klc-badge--tora {
  border-color: #d0a464;
  background: #fff5e7;
  color: #684515;
}

#lucky-day-calendar-tool .klc-badge--mi {
  border-color: #76ad9e;
  background: #eaf7f3;
  color: #285f52;
}

#lucky-day-calendar-tool .klc-badge--fujoju {
  border-color: #ad8992;
  background: #f8ecef;
  color: #6c3541;
}

#lucky-day-calendar-tool[data-theme="dark"] .klc-badge--ichiryumanbai,
#lucky-day-calendar-tool[data-theme="dark"] .klc-badge--tensha,
#lucky-day-calendar-tool[data-theme="dark"] .klc-badge--tora,
#lucky-day-calendar-tool[data-theme="dark"] .klc-badge--mi,
#lucky-day-calendar-tool[data-theme="dark"] .klc-badge--fujoju {
  background: #293733;
  color: var(--klc-text);
}

#lucky-day-calendar-tool .klc-empty {
  margin: 0;
  padding: 14px 16px;
  color: var(--klc-muted);
  font-size: 14px;
}

#lucky-day-calendar-tool .klc-explanations {
  margin-top: 34px;
}

#lucky-day-calendar-tool .klc-section-title {
  margin: 0 0 14px;
  color: var(--klc-text);
  font-size: 22px;
  font-weight: 750;
}

#lucky-day-calendar-tool .klc-explanation-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

#lucky-day-calendar-tool .klc-explanation-card {
  margin: 0;
  padding: 16px;
  border: 1px solid var(--klc-border);
  border-radius: 14px;
  background: var(--klc-card);
}

#lucky-day-calendar-tool .klc-explanation-title {
  margin: 0 0 5px;
  color: var(--klc-main-dark);
  font-size: 16px;
  font-weight: 750;
}

#lucky-day-calendar-tool .klc-explanation-card p,
#lucky-day-calendar-tool .klc-method-body p {
  margin: 0;
  color: var(--klc-muted);
  font-size: 14px;
}

#lucky-day-calendar-tool .klc-method {
  margin-top: 18px;
  border: 1px solid var(--klc-border);
  border-radius: 14px;
  background: var(--klc-card);
}

#lucky-day-calendar-tool .klc-method summary {
  padding: 14px 16px;
  color: var(--klc-text);
  font-weight: 700;
  cursor: pointer;
}

#lucky-day-calendar-tool .klc-method-body {
  display: grid;
  gap: 10px;
  padding: 0 16px 16px;
}

#lucky-day-calendar-tool .klc-tab:focus-visible,
#lucky-day-calendar-tool .klc-theme-button:focus-visible,
#lucky-day-calendar-tool .klc-submit:focus-visible,
#lucky-day-calendar-tool .klc-field select:focus-visible,
#lucky-day-calendar-tool .klc-check input:focus-visible,
#lucky-day-calendar-tool .klc-method summary:focus-visible {
  outline: 3px solid var(--klc-focus);
  outline-offset: 3px;
}

@media (max-width: 640px) {
  #lucky-day-calendar-tool {
    padding: 17px;
    border-radius: 18px;
  }

  #lucky-day-calendar-tool .klc-header {
    display: grid;
    gap: 13px;
  }

  #lucky-day-calendar-tool .klc-theme-button {
    justify-self: start;
  }

  #lucky-day-calendar-tool .klc-day-item {
    grid-template-columns: 1fr;
    gap: 7px;
  }

  #lucky-day-calendar-tool .klc-explanation-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 390px) {
  #lucky-day-calendar-tool .klc-filter-grid {
    display: grid;
    grid-template-columns: 1fr;
  }

  #lucky-day-calendar-tool .klc-check {
    border-radius: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  #lucky-day-calendar-tool *,
  #lucky-day-calendar-tool *::before,
  #lucky-day-calendar-tool *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}