:root {
  /* =========================
     テーマ：デフォルト
  ========================= */
  /* Brand / Accent */
  --color-brand: #02b9a5;
  --color-brand-soft: #ecfff3;
  --color-brand-border: #bdebcf;
  --color-accent: #00b7c2;
  --color-accent-text: #1b6b3a;
  /* Page / Surface */
  --color-page-bg: #f6f6f6;
  --color-surface: #ffffff;
  --color-surface-soft: #f2f2f2;
  --color-surface-accent: #f4fffc;
  --color-surface-danger: #fff0f0;
  --color-surface-media: #eaeaea;
  /* Text */
  --color-text: #222;
  --color-text-sub: #333;
  --color-text-muted: #666;
  --color-text-description: #555;
  --color-text-inverse: #ffffff;
  /* Link */
  --color-link: #5ea999;
  --color-link-hover: #4d8f81;
  /* Border */
  --color-border: #ddd;
  --color-border-soft: #d9d9d9;
  --color-border-light: #eee;
  --color-border-accent: #d7efe8;
  /* Button */
  --color-button-gray-bg: #e5e7eb;
  --color-button-gray-text: #6b7280;
  /* Status */
  --color-danger: #b00020;
  /* Overlay */
  --color-overlay: rgba(0, 0, 0, 0.42);
  --color-transparent: transparent;
  /* Shadow */
  --shadow-card: 0 4px 14px rgba(0, 0, 0, 0.06);
  --shadow-card-soft: 0 4px 14px rgba(0, 0, 0, 0.04);
  --shadow-card-strong: 0 4px 14px rgba(0, 0, 0, 0.241);
  --shadow-modal: 0 10px 32px rgba(0, 0, 0, 0.22);
  /* Radius */
  --radius-card: 16px;
  --radius-button: 999px;
}

/* =========================
   テーマ：勝利
========================= */
:root[data-theme="red"] {
  --color-brand: #ef4444;
  --color-brand-soft: #fff1f2;
  --color-brand-border: #fecdd3;
  --color-accent: #f43f5e;
  --color-accent-text: #991b1b;
  --color-link: #dc2626;
  --color-link-hover: #b91c1c;
  --color-surface-accent: #fff1f2;
  --color-border-accent: #fecdd3;
}

/* =========================
   テーマ：風磨
========================= */
:root[data-theme="purple"] {
  --color-brand: #8b5cf6;
  --color-brand-soft: #f5f3ff;
  --color-brand-border: #ddd6fe;
  --color-accent: #a78bfa;
  --color-accent-text: #5b21b6;
  --color-link: #7c3aed;
  --color-link-hover: #6d28d9;
  --color-surface-accent: #f5f3ff;
  --color-border-accent: #ddd6fe;
}

/* =========================
   テーマ：聡ちゃん
========================= */
:root[data-theme="green"] {
  --color-brand: #22c55e;
  --color-brand-soft: #f0fdf4;
  --color-brand-border: #bbf7d0;
  --color-accent: #16a34a;
  --color-accent-text: #166534;
  --color-link: #16a34a;
  --color-link-hover: #15803d;
  --color-surface-accent: #f0fdf4;
  --color-border-accent: #bbf7d0;
}

/* =========================
   テーマ：寺
========================= */
:root[data-theme="sky"] {
  --color-brand: #38bdf8;
  --color-brand-soft: #f0f9ff;
  --color-brand-border: #bae6fd;
  --color-accent: #0ea5e9;
  --color-accent-text: #075985;
  --color-link: #0284c7;
  --color-link-hover: #0369a1;
  --color-surface-accent: #f0f9ff;
  --color-border-accent: #bae6fd;
}

/* =========================
   テーマ：原ちゃん
========================= */
:root[data-theme="lime"] {
  --color-brand: #84cc16;
  --color-brand-soft: #f7fee7;
  --color-brand-border: #d9f99d;
  --color-accent: #65a30d;
  --color-accent-text: #365314;
  --color-link: #65a30d;
  --color-link-hover: #4d7c0f;
  --color-surface-accent: #f7fee7;
  --color-border-accent: #d9f99d;
}

/* =========================
   テーマ：将生
========================= */
:root[data-theme="pink"] {
  --color-brand: #f472b6;
  --color-brand-soft: #fff0f7;
  --color-brand-border: #f9c5df;
  --color-accent: #fb7185;
  --color-accent-text: #9d174d;
  --color-link: #db2777;
  --color-link-hover: #be185d;
  --color-surface-accent: #fff5f9;
  --color-border-accent: #f9c5df;
}
/* =========================
   テーマ：周杜
========================= */
:root[data-theme="yellow"] {
  --color-brand: #ffde22;
  --color-brand-soft: #fefce8;
  --color-brand-border: #fde68a;
  --color-accent: #eab308;
  --color-accent-text: #713f12;
  --color-link: #ca8a04;
  --color-link-hover: #a16207;
  --color-surface-accent: #fefce8;
  --color-border-accent: #fde68a;
}

/* =========================
   テーマ：しの
========================= */
:root[data-theme="white"] {
  --color-brand: #666666;
  --color-brand-soft: #ffffff;
  --color-brand-border: #666666;
  --color-accent: #666666;
  --color-accent-text: #666666;
  --color-page-bg: #f6f6f6;
  --color-surface: #ffffff;
  --color-text: #111827;
  --color-text-sub: #434343;
  --color-text-muted: #4b5563;
  --color-text-description: #374151;
  --color-link: #111827;
  --color-link-hover: #000000;
  --color-border-accent: #666666;
  --shadow-card: none;
  --shadow-card-soft: none;
  --shadow-card-strong: none;
}
:root[data-theme="white"] .post-preview-tab.active,
:root[data-theme="white"] .primary-button {
  box-shadow: inset 0 0 0 1px var(--color-border-soft);
  background: var(--color-brand);
  color: var(--color-text-inverse);
}
:root[data-theme="white"] .selected-area,
:root[data-theme="white"] .check-control-area,
:root[data-theme="white"] .home-card,
:root[data-theme="white"] .request-ranking-card {
  box-shadow: 0 0px 2px var(--color-border-soft);
}
:root[data-theme="white"] .home-list-box,
:root[data-theme="white"] .request-ranking-item,
:root[data-theme="white"] .song-6f6f6button,
:root[data-theme="white"] .accordion-button,
:root[data-theme="white"] .check-item {
  border-color: var(--color-border);
}
:root[data-theme="white"] .song-button.selected,
:root[data-theme="white"] .theme-button.active,
:root[data-theme="white"] .request-ranking-rank {
  border-color: var(--color-brand);
  background: var(--color-surface);
  color: var(--color-brand);
}
:root[data-theme="white"] .post-preview-tabs {
  background: var(--color-page-bg);
}

/* =========================
   共通 - 画面設定
========================= */
* {
  box-sizing: border-box;
}
html,
body {
  height: 100%;
}
body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--color-page-bg);
  color: var(--color-text);
}
.app {
  width: min(100%, 820px);
  height: 100dvh;
  margin: 0 auto;
  padding: 0px;
  overflow: hidden;
}
/*タイトル表示*/
.header {
  flex-shrink: 0;
  margin-bottom: 14px;
}
/*メインコンテンツ表示*/
.step-screen {
  height: calc(100% - 60px);
  display: flex;
  flex-direction: column;
  overflow-y: scroll;
  padding: 18px 12px;
}

/* =========================
   共通 - パーツ
========================= */
h1 {
  margin: 0;
  font-size: 24px;
  line-height: 1.4;
}
.description {
  margin: 10px 0 0;
  color: var(--color-text-description);
  line-height: 1.7;
}
.selected-area,
.task-card {
  flex-shrink: 0;
  margin: 0 0 14px;
  padding: 16px;
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}
.primary-button,
.secondary-button,
.gray-button {
  display:block;
  text-decoration:none;
  text-align:center;
  width: 100%;
  margin-top: 10px;
  padding: 14px 16px;
  border-radius: var(--radius-button);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
}
.primary-button {
  border: none;
  background: var(--color-brand);
  color: var(--color-text-inverse);
}
.secondary-button {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
}
.gray-button {
  border: 1px solid var(--color-border);
  background: var(--color-button-gray-bg);
  color: var(--color-button-gray-text);
}
.gray-button:active {
  transform: scale(0.98);
}
.gray-button:disabled {
  opacity: 0.7;
}
.no-margin-button {
  margin-top: 0;
}
.button-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.compact-button {
  margin-top: 0;
  border-radius: 14px;
}
.accordion-button {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 17px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}
.accordion-content {
  margin-top: 12px;
}
.check-control-area {
  margin: 0 0 14px;
  padding: 16px;
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}
.check-list {
  display: grid;
  gap: 10px;
}
.check-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  background: var(--color-surface);
  cursor: pointer;
}
.check-item input {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}
.check-item-name {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
}
.bottom-action-area {
  margin: 14px 0 20px;
  padding: 10px 16px 16px 16px;
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}
.group-label {
  margin: 0 0 8px;
  color: var(--color-brand);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.5;
}

.task-help-button {
  text-decoration:none;
  flex-shrink: 0;
  padding: 5px 8px;
  border: none;
  border-radius: 999px;
  background: #eeeeee;
  color: var(--color-text-sub);
  font-size: 11px;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
}
.task-help-button:active {
  transform: scale(0.98);
}

/* =========================
   Feedback
========================= */
.feedback-card {
  margin-top: 16px;
}
.feedback-text {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-description);
}
.feedback-link-button {
  display: block;
  text-align: center;
  text-decoration: none;
}
.error-area {
  flex-shrink: 0;
  margin: 0 0 14px;
  padding: 14px;
  border-radius: 12px;
  background: var(--color-surface-danger);
  color: var(--color-danger);
  line-height: 1.6;
}

/* =========================
   デイリー・おかわりデイリー共通
========================= */
.daily-task-copy-preview {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.04);
}

.daily-task-copy-preview-note {
  margin: 0;
  color: var(--color-text-sub);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.6;
}

.daily-task-copy-preview-text {
  margin: 6px 0;
  padding: 8px 10px;
  border-radius: 8px;
  background: var(--color-surface);
  color: var(--color-text);
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  box-shadow: 0 0 1px 1px var(--color-border-light);
  font-weight: 500;
}