/* ===== リセットと基本設定 ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --pink: #e8789a;
  --pink-light: #fdf0f4;
  --pink-dark: #c4566e;
  --gray: #666;
  --gray-light: #f5f5f5;
  --radius: 12px;
  --font: 'Zen Maru Gothic', 'Rounded Mplus 1c', sans-serif;
}

html {
  font-size: 15px;
}

body {
  font-family: var(--font);
  color: #333;
  background: var(--pink-light);
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

/* ===== ヘッダー ===== */
.site-header {
  text-align: center;
  padding: 1.5rem 1rem 1rem;
  background: #fff;
  border-bottom: 3px solid var(--pink);
}

.site-title {
  font-size: 1.6rem;
  color: var(--pink);
  letter-spacing: 0.05em;
}

.site-subtitle {
  font-size: 0.8rem;
  color: var(--gray);
  margin-top: 0.2rem;
}

.coverage {
  display: inline-block;
  margin-top: 0.6rem;
  padding: 0.2rem 0.8rem;
  background: var(--pink);
  color: #fff;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
}

.notice {
  margin-top: 0.5rem;
  font-size: 0.7rem;
  color: var(--gray);
}

/* ===== 絞り込みエリア ===== */
.filter-area {
  position: sticky;
  top: 0;
  z-index: 10;
  background: #fff;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid #eee;
}

.char-filter-toggle {
  margin-bottom: 0.6rem;
}

.char-filter-toggle summary {
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--pink-dark);
  margin-bottom: 0.4rem;
}

.char-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.4rem;
}

.char-btn {
  border: 2px solid var(--pink);
  background: #fff;
  color: var(--pink);
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-family: var(--font);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}

.char-btn:hover {
  background: var(--pink-light);
}

.char-btn.active {
  background: var(--pink);
  color: #fff;
}

.search-box {
  position: relative;
}

#search-input {
  width: 100%;
  padding: 0.5rem 0.8rem;
  border: 2px solid #ddd;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-family: var(--font);
  outline: none;
  transition: border-color 0.15s;
}

#search-input:focus {
  border-color: var(--pink);
}

.filter-status {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--pink-dark);
  font-weight: 700;
}

.btn-clear {
  border: 1px solid var(--pink);
  background: #fff;
  color: var(--pink);
  padding: 0.15rem 0.6rem;
  border-radius: var(--radius);
  font-size: 0.75rem;
  font-family: var(--font);
  cursor: pointer;
}

.btn-clear:hover {
  background: var(--pink-light);
}

/* ===== 話一覧 ===== */
.episode-list {
  padding: 0.8rem 1rem 2rem;
}

.ep-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 0.8rem 1rem;
  margin-bottom: 0.6rem;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

.ep-card[hidden] {
  display: none;
}

.ep-header {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.3rem;
}

.ep-number {
  font-weight: 700;
  color: var(--pink);
  font-size: 1rem;
  white-space: nowrap;
}

.ep-subtitle {
  font-size: 0.85rem;
  color: var(--gray);
}

.ep-chars {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-top: 0.3rem;
}

.char-tag {
  display: inline-block;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  font-size: 0.75rem;
}

.char-tag.main {
  background: var(--pink);
  color: #fff;
}

.char-tag.sub {
  background: var(--gray-light);
  color: var(--gray);
}

.char-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}


/* ===== フッター ===== */
.site-footer {
  padding: 1.5rem 1rem;
  background: #fff;
  border-top: 3px solid var(--pink);
  font-size: 0.75rem;
  color: var(--gray);
}

.about-section {
  margin-bottom: 1rem;
}

.about-section summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--pink-dark);
}

.about-section ul {
  margin: 0.5rem 0 0.5rem 1.2rem;
}

.about-section li {
  margin-bottom: 0.2rem;
}

.report-section {
  margin-bottom: 1rem;
}

.report-link {
  display: inline-block;
  padding: 0.3rem 1rem;
  background: var(--pink);
  color: #fff;
  text-decoration: none;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 0.8rem;
}

.report-link:hover {
  background: var(--pink-dark);
}

.ai-notice {
  margin: 1rem 0;
  padding: 0.6rem 0.8rem;
  background: var(--gray-light);
  border-radius: var(--radius);
}

.ai-notice p {
  margin-bottom: 0.3rem;
}

.ai-notice p:last-child {
  margin-bottom: 0;
}

.copyright {
  margin-top: 1rem;
  text-align: center;
  line-height: 1.8;
}

/* ===== PC向け ===== */
@media (min-width: 640px) {
  html {
    font-size: 16px;
  }

  .site-header,
  .filter-area,
  .episode-list,
  .site-footer {
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
  }

  .ep-card {
    padding: 1rem 1.2rem;
  }
}