/* ---------- デザイントークン ---------- */
:root {
  /* ベース */
  --bg: #f4f5f9;
  --card: #ffffff;
  --field: #f8f9fc;
  --text: #1c2030;
  --muted: #5f6578;        /* 白背景でコントラスト比 5.5:1 程度 */
  --placeholder: #8c92a4;
  --border: #e4e7ef;
  --border-strong: #cfd4e0;

  /* アシスタント：紫 */
  --assist: #7c5cff;
  --assist-ink: #5b3fd9;   /* 淡い背景に載せる文字色 */
  --assist-soft: #f1edff;
  --assist-line: #d6ccff;

  /* 生成：オレンジ */
  --generate: #ee5a24;
  --generate-ink: #c2410c;
  --generate-soft: #fff1ea;
  --generate-line: #ffd3bf;

  /* 状態 */
  --success: #15803d;
  --danger: #b3261e;
  --danger-soft: #fdecea;
  --danger-line: #f5c2bd;

  /* 形 */
  --radius-lg: 20px;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(28, 32, 48, 0.06);
  --shadow: 0 1px 2px rgba(28, 32, 48, 0.04), 0 8px 24px rgba(28, 32, 48, 0.06);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", "Meiryo", system-ui, sans-serif;
  background:
    radial-gradient(900px 400px at 0% 0%, rgba(124, 92, 255, 0.07), transparent 70%),
    radial-gradient(900px 400px at 100% 0%, rgba(238, 90, 36, 0.06), transparent 70%),
    var(--bg);
  background-repeat: no-repeat;
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; }

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* キーボード操作用：見た目は隠すがフォーカスは受け取れる */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---------- Header ---------- */
.app-header {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  height: 64px;
}
.logo { display: flex; align-items: center; gap: 12px; min-width: 0; }
.logo-mark {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--assist), var(--generate));
  color: #fff;
  font-weight: 800;
  box-shadow: var(--shadow-sm);
}
.logo-text {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.badge-mock {
  flex-shrink: 0;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted);
  background: var(--card);
  border: 1px solid var(--border);
  padding: 2px 10px;
  border-radius: 999px;
}

/* ---------- Layout ---------- */
.main-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  padding-top: 40px;
  padding-bottom: 40px;
  align-items: start;
}

.panel {
  position: relative;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow);
  overflow: hidden;
}
/* 上部のアクセントライン */
.panel::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  background: var(--accent);
}
.panel-assist {
  --accent: var(--assist);
  --ink: var(--assist-ink);
  --soft: var(--assist-soft);
  --line: var(--assist-line);
}
.panel-generate {
  --accent: var(--generate);
  --ink: var(--generate-ink);
  --soft: var(--generate-soft);
  --line: var(--generate-line);
}

.panel-head { margin-bottom: 28px; }
.step {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink);
  background: var(--soft);
  padding: 2px 12px;
  border-radius: 999px;
}
.panel-head h2 {
  margin: 12px 0 8px;
  font-size: 1.5rem;
  line-height: 1.4;
  letter-spacing: 0.01em;
}
.lead { margin: 0; color: var(--muted); font-size: 0.95rem; }

/* ---------- Form ---------- */
.form { display: flex; flex-direction: column; gap: 24px; }
.field { display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.field > label { font-weight: 700; font-size: 0.9rem; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

select,
textarea {
  width: 100%;
  font: inherit;
  font-size: 16px; /* iOSでズームされないサイズ */
  color: var(--text);
  background-color: var(--field);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  transition: border-color 0.15s, box-shadow 0.15s, background-color 0.15s;
}
select {
  min-height: 48px;
  appearance: none;
  -webkit-appearance: none;
  padding-right: 40px;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%235f6578' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
}
textarea { resize: vertical; min-height: 120px; }
textarea::placeholder { color: var(--placeholder); }
select:hover,
textarea:hover { border-color: var(--border-strong); }
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--soft);
  background-color: #fff;
}

.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 32px 16px;
  border: 2px dashed var(--line);
  border-radius: var(--radius);
  background: var(--soft);
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background-color 0.15s, box-shadow 0.15s;
}
.dropzone:hover { border-color: var(--accent); }
.dropzone:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 20%, transparent);
}
.dropzone-icon { font-size: 2rem; line-height: 1.3; }
.dropzone-title { font-weight: 700; color: var(--ink); word-break: break-all; }
.dropzone-sub { font-size: 0.8rem; color: var(--muted); }
.dropzone-thumb {
  max-height: 160px;
  max-width: 100%;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  border: 1px solid var(--border);
  background: #fff;
}

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip input { position: absolute; opacity: 0; pointer-events: none; }
.chip span {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.9rem;
  cursor: pointer;
  background: #fff;
  transition: background-color 0.15s, border-color 0.15s, color 0.15s;
}
.chip span:hover { border-color: var(--border-strong); background: var(--field); }
.chip input:checked + span {
  background: var(--soft);
  border-color: var(--accent);
  color: var(--ink);
  font-weight: 700;
  box-shadow: inset 0 0 0 1px var(--accent);
}
.chip input:focus-visible + span { box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 25%, transparent); }

.btn {
  width: 100%;
  min-height: 56px;
  font: inherit;
  font-size: 1.2rem; /* 太字の大きな文字にして白文字の読みやすさを確保 */
  font-weight: 800;
  letter-spacing: 0.02em;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  box-shadow: 0 6px 16px color-mix(in srgb, var(--accent) 30%, transparent);
  transition: transform 0.1s, filter 0.15s, box-shadow 0.15s;
}
.btn:hover { filter: brightness(1.06); box-shadow: 0 8px 20px color-mix(in srgb, var(--accent) 38%, transparent); }
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 45%, transparent); outline-offset: 3px; }
.btn:disabled {
  filter: saturate(0.6) opacity(0.75);
  box-shadow: none;
  cursor: wait;
  transform: none;
}

.note { margin: -12px 0 0; font-size: 0.8rem; color: var(--muted); }

/* ---------- Assist result ---------- */
.result {
  margin-top: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.result-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--soft);
  font-weight: 700;
  font-size: 0.9rem;
}
.avatar {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 800;
}
.result-body { padding: 20px; white-space: pre-wrap; overflow-wrap: anywhere; }
.result-body.is-placeholder { color: var(--muted); font-size: 0.95rem; }
.result-title { margin: 0 0 6px; font-weight: 700; }
.result-body ul { margin: 0; padding-left: 1.2em; }
.result-body li + li { margin-top: 6px; }

/* ---------- Generate preview ---------- */
.preview {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.preview-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 4px 12px;
  margin-bottom: 16px;
  font-weight: 700;
}
.preview-meta { font-size: 0.85rem; color: var(--muted); font-weight: 400; }

.preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 16px;
}
.page-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.page-card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
  padding: 10px 12px 8px;
  font-size: 0.8rem;
  white-space: nowrap;
}
.page-no { font-weight: 800; }
.page-tag {
  color: var(--ink);
  background: var(--soft);
  border-radius: 999px;
  padding: 0 8px;
  font-size: 0.75rem;
  font-weight: 700;
}
.page-canvas {
  aspect-ratio: 3 / 4;
  margin: 0 12px;
  padding: 6px;
  background: #fafafa;
  border: 2px solid #2a2d38;
  border-radius: 2px;
  display: grid;
  gap: 5px;
}
.page-canvas .koma {
  background: repeating-linear-gradient(45deg, #eee, #eee 6px, #f7f7f7 6px, #f7f7f7 12px);
  border: 1.5px solid #2a2d38;
}
.page-card-foot {
  padding: 10px 12px 12px;
  line-break: strict; /* 「ー」などが行頭に来ないようにする */
  text-wrap: pretty;
}
.page-card-foot strong { display: block; font-size: 0.85rem; }
.page-card-foot small { color: var(--muted); font-size: 0.75rem; line-height: 1.5; display: block; }

.page-image {
  display: block;
  width: calc(100% - 24px);
  margin: 0 12px;
  aspect-ratio: 2 / 3;
  object-fit: contain;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 2px;
}

/* 生成状態 */
.page-card[data-state="loading"] { border-color: var(--line); box-shadow: 0 0 0 3px var(--soft); }
.page-card[data-state="loading"] .page-canvas { animation: pulse 1s ease-in-out infinite; }
.page-card[data-state="loading"] .page-status { color: var(--ink); }
.page-card[data-state="waiting"] .page-canvas { opacity: 0.5; }
.page-card[data-state="done"] .page-status { color: var(--success); }
.page-card[data-state="error"] .page-status { color: var(--danger); }
@keyframes pulse { 50% { opacity: 0.4; } }
@media (prefers-reduced-motion: reduce) {
  .page-card[data-state="loading"] .page-canvas { animation: none; opacity: 0.6; }
}

/* ---------- エラー ---------- */
.error-box {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: var(--radius);
  background: var(--danger-soft);
  border: 1px solid var(--danger-line);
  color: var(--danger);
  font-size: 0.9rem;
  font-weight: 700;
}

.app-footer {
  padding: 0 0 40px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--muted);
}

/* ---------- Responsive ---------- */
/* タブレット：1カラム。横に広がりすぎないよう幅を抑える */
@media (max-width: 960px) {
  .main-grid {
    grid-template-columns: 1fr;
    max-width: 760px;
    gap: 24px;
    padding-top: 32px;
  }
  .preview-grid { grid-template-columns: repeat(4, 1fr); }
}

/* スマホ：縦並び・余白を少し詰める */
@media (max-width: 600px) {
  .container { padding: 0 16px; }
  .header-inner { height: 56px; }
  .logo { gap: 10px; }
  .logo-mark { width: 32px; height: 32px; border-radius: 9px; }
  .logo-text { font-size: 1.05rem; }
  .main-grid { gap: 20px; padding-top: 20px; padding-bottom: 32px; }
  .panel { padding: 24px 20px; border-radius: 16px; }
  .panel-head { margin-bottom: 24px; }
  .panel-head h2 { font-size: 1.25rem; }
  .form { gap: 20px; }
  .note { margin-top: -8px; }
  .field-row { grid-template-columns: 1fr; }
  .dropzone { padding: 24px 16px; }
  /* プレビューは2列にして縦に長くなりすぎないようにする */
  .preview-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .page-card-head { padding: 8px 10px 6px; }
  .page-canvas,
  .page-image { margin: 0 10px; }
  .page-image { width: calc(100% - 20px); }
  .page-card-foot { padding: 8px 10px 10px; }
}