:root {
  --bg: #f5f6fa;
  --card: #ffffff;
  --text: #1f2333;
  --muted: #5f6478;        /* 薄いグレー背景の上でも読める濃さ */
  --border: #e2e5ee;
  --assist: #0e9f8e;        /* アシスタント：ティール */
  --assist-soft: #e6f6f4;
  --generate: #6c4cf5;      /* 漫画生成：パープル */
  --generate-soft: #efebff;
  --radius: 16px;
  --shadow: 0 1px 2px rgba(31, 35, 51, 0.04), 0 8px 24px rgba(31, 35, 51, 0.06);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header ---------- */
.app-header {
  /* 2つの機能色（ティール・パープル）を淡く重ねて、画面全体の色とつなげる */
  background:
    radial-gradient(circle at 85% 0%, rgba(108, 76, 245, 0.45), transparent 45%),
    radial-gradient(circle at 10% 120%, rgba(14, 159, 142, 0.35), transparent 40%),
    linear-gradient(120deg, #1f2333, #2e2a5a);
  color: #fff;
  padding: 36px 0;
}
.app-title {
  margin: 0;
  font-size: 2rem;
  line-height: 1.3;
  letter-spacing: 0.01em;
}
.app-subtitle {
  margin: 6px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 1rem;
}

/* ---------- Layout (PC: 2カラム) ---------- */
.layout {
  display: grid;
  /* 生成結果を並べる「漫画生成」側を少し広くする */
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 28px;
  padding-top: 32px;
  padding-bottom: 40px;
  align-items: start;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.panel {
  padding: 32px;
  border-top-width: 4px;
}
/* パネルごとのアクセント色（フォーカス枠などで使う） */
.panel--assist { border-top-color: var(--assist); --accent: var(--assist); --accent-ring: rgba(14, 159, 142, 0.18); }
.panel--generate { border-top-color: var(--generate); --accent: var(--generate); --accent-ring: rgba(108, 76, 245, 0.16); }

.panel-head h2 {
  margin: 12px 0 6px;
  font-size: 1.4rem;
  line-height: 1.4;
}
.panel-desc {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 0.95rem;
}

.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.badge--assist { background: var(--assist-soft); color: var(--assist); }
.badge--generate { background: var(--generate-soft); color: var(--generate); }

/* ---------- Form ---------- */
.field { margin-bottom: 24px; }
.label {
  display: block;
  margin-bottom: 8px;
  font-weight: 700;
  font-size: 0.95rem;
}

select,
textarea {
  width: 100%;
  padding: 12px 14px;
  font: inherit;
  font-size: 16px; /* iOSでのズーム防止 */
  color: var(--text);
  background: #fbfbfd;
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
}
select { min-height: 48px; cursor: pointer; }
textarea { resize: vertical; }
select:hover,
textarea:hover { border-color: #c9cede; }
select:focus,
textarea:focus {
  outline: none;
  background: #fff;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-ring);
}
::placeholder { color: #8a8fa3; }

.upload {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  position: relative;
  padding: 32px 16px;
  text-align: center;
  border: 2px dashed #b9dcd6;
  border-radius: 12px;
  background: var(--assist-soft);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}
.upload:hover { border-color: var(--assist); background: #dcf2ef; }
/* ファイル入力は見た目だけ隠し、キーボードでも選べるようにする */
.upload input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.upload:focus-within { border-color: var(--assist); box-shadow: 0 0 0 4px var(--accent-ring); }
.upload-icon { font-size: 2rem; line-height: 1; }
.upload-text { color: var(--muted); font-size: 0.95rem; line-height: 1.6; }
.upload-text small { font-size: 0.8rem; }
.upload-file { color: var(--assist); font-weight: 700; font-size: 0.85rem; }

/* ---------- Buttons ---------- */
.btn {
  display: block;
  width: 100%;
  min-height: 52px;
  padding: 14px 20px;
  border: none;
  border-radius: 12px;
  color: #fff;
  font: inherit;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s, filter 0.2s;
}
.btn:hover { filter: brightness(1.08); transform: translateY(-1px); }
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 3px solid var(--accent-ring); outline-offset: 3px; }
.btn--assist { background: var(--assist); box-shadow: 0 6px 16px rgba(14, 159, 142, 0.25); }
.btn--generate { background: var(--generate); box-shadow: 0 6px 16px rgba(108, 76, 245, 0.28); }

/* ---------- アシスタント出力 ---------- */
.output {
  margin-top: 28px;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}
.output-head {
  padding: 12px 18px;
  background: var(--assist-soft);
  color: var(--assist);
  font-weight: 700;
  font-size: 0.9rem;
}
.output-body { padding: 18px 20px; }
.output-title { margin: 0 0 6px; font-weight: 700; }
.output-body ul { margin: 0; padding-left: 1.2em; }
.output-body li { margin-bottom: 6px; }

/* ---------- 生成プレビュー ---------- */
.preview-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: 32px 0 16px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}
.preview-head h3 { margin: 0; font-size: 1.1rem; }
.preview-meta {
  padding: 2px 12px;
  border-radius: 999px;
  background: var(--generate-soft);
  color: var(--generate);
  font-size: 0.82rem;
  font-weight: 700;
}

/* PCでは横並び */
.preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 14px;
}

.preview-card {
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  background: #fff;
  transition: box-shadow 0.2s, transform 0.2s, border-color 0.2s;
}
.preview-card:hover { box-shadow: 0 8px 20px rgba(31, 35, 51, 0.08); }
.preview-card-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  column-gap: 8px;
  padding: 8px 12px;
  background: var(--generate-soft);
  font-size: 0.8rem;
  white-space: nowrap;
  line-height: 1.5;
}
.preview-card-head { background: #fff; border-bottom: 1px solid var(--border); }
.preview-card-head strong { color: var(--text); }
.status {
  padding: 0 8px;
  border-radius: 999px;
  background: #f1f2f7;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
}
.preview-card[data-state="loading"] { border-color: var(--generate); }
.preview-card[data-state="loading"] .status { background: var(--generate-soft); color: var(--generate); }
.preview-card[data-state="done"] .status { background: #e3f6ec; color: #13794a; }
.preview-card[data-state="error"] .status { background: #fdecec; color: #b42318; }
.preview-card[data-state="error"] .preview-caption { color: #b42318; }
.preview-card[data-state="loading"] .preview-image { animation: pulse 1.2s ease-in-out infinite; }
.preview-image {
  aspect-ratio: 3 / 4;
  margin: 10px;
  display: grid;
  gap: 4px;
  padding: 4px;
  border: 2px solid #2b2f3f;
  background: #fff;
}
.preview-image span {
  background: repeating-linear-gradient(45deg, #f1f2f7, #f1f2f7 6px, #e7e9f1 6px, #e7e9f1 12px);
  border: 1.5px solid #2b2f3f;
}
.preview-caption {
  padding: 0 8px 12px;
  text-align: center;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--muted);
}
.preview-caption b { display: block; color: var(--text); font-size: 0.8rem; white-space: nowrap; }

.app-footer {
  padding: 8px 0 40px;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}

/* ---------- API連携まわり ---------- */
.upload-preview {
  max-width: 100%;
  max-height: 180px;
  border-radius: 8px;
  border: 1px solid var(--border);
}
.btn:disabled { opacity: 0.6; cursor: wait; filter: none; box-shadow: none; }
.error {
  margin: 12px 0 0;
  padding: 10px 14px;
  border-radius: 10px;
  background: #fdecec;
  color: #b42318;
  font-size: 0.9rem;
}
.output-body--ai { white-space: pre-wrap; }
.preview-result {
  display: block;
  width: calc(100% - 20px);
  margin: 10px;
  border: 1px solid var(--border);
  cursor: zoom-in;
}
@keyframes pulse { 50% { opacity: 0.4; } }

/* ---------- 漫画生成：アプリ風の選択UI ---------- */
.label-row { display: flex; justify-content: space-between; align-items: baseline; }
.char-count { color: var(--muted); font-size: 0.85rem; }

.settings {
  margin-bottom: 24px;
  padding: 20px 20px 4px;
  border-radius: 14px;
  background: #f8f8fc;
}
fieldset { margin: 0 0 18px; padding: 0; border: none; min-width: 0; }
legend.label { padding: 0; }

/* 選択肢の共通部分：ラジオボタン本体は隠し、ラベルをボタン風に見せる */
.segmented input,
.chips input { position: absolute; opacity: 0; pointer-events: none; }
.segmented span,
.chips span {
  display: block;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--muted);
  text-align: center;
  cursor: pointer;
  user-select: none;
  transition: background 0.15s, color 0.15s, box-shadow 0.15s;
}
.segmented input:focus-visible + span,
.chips input:focus-visible + span { outline: 2px solid var(--generate); outline-offset: 2px; }

/* 枚数・コマ数：セグメントコントロール */
.segmented {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
  padding: 4px;
  border-radius: 12px;
  background: #ebecf3;
}
.segmented span { padding: 10px 4px; border-radius: 9px; }
.segmented span:hover { color: var(--text); }
.segmented input:checked + span {
  background: #fff;
  color: var(--generate);
  box-shadow: 0 1px 4px rgba(31, 35, 51, 0.12);
}

/* 雰囲気：チップ */
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips span {
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #fff;
}
.chips span:hover { border-color: var(--generate); color: var(--generate); }
.chips input:checked + span { background: var(--generate); border-color: var(--generate); color: #fff; }
fieldset:disabled span,
textarea:disabled { opacity: 0.55; cursor: not-allowed; }

/* 生成の進捗 */
.progress { margin-top: 14px; }
.progress-bar { height: 8px; border-radius: 999px; background: #ebecf3; overflow: hidden; }
.progress-bar span {
  display: block;
  height: 100%;
  width: 0;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--generate), #9b82ff);
  transition: width 0.4s ease;
}
.progress-text { margin: 8px 0 0; color: var(--muted); font-size: 0.9rem; }

/* ---------- タブレット：1カラム ---------- */
@media (max-width: 960px) {
  /* 1カラム時に横に伸びすぎないよう、ヘッダー・本文・フッターの幅をそろえて絞る */
  .container { max-width: 800px; }
  .layout { grid-template-columns: 1fr; }
  .preview-grid { grid-template-columns: repeat(4, 1fr); }
}

/* ---------- スマホ：縦並び ---------- */
@media (max-width: 600px) {
  .container { padding: 0 16px; }
  .app-header { padding: 24px 0; }
  .app-title { font-size: 1.5rem; }
  .app-subtitle { font-size: 0.92rem; }
  .layout { gap: 20px; padding-top: 20px; }
  .panel { padding: 24px 20px; }
  .panel-head h2 { font-size: 1.25rem; }
  .settings { padding: 16px 14px 2px; }
  .segmented span { padding: 11px 2px; }
  .chips span { padding: 9px 14px; }
  .preview-grid { grid-template-columns: 1fr; }
  .preview-image,
  .preview-result { max-width: 280px; margin: 10px auto; }
}

/* 動きを減らす設定の人には、アニメーションを控える */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}