:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #1c2030;
  --text-sub: #4a5065;
  --muted: #6b7183;
  --border: #e4e7ef;
  --field-bg: #f9fafc;
  --assistant: #6d4aff;      /* 企画アシスタント：紫（メインカラー） */
  --assistant-hover: #5b38f0;
  --assistant-soft: #f2efff;
  --assistant-line: #d9d0ff;
  --generate: #f2643a;       /* 漫画生成：オレンジ（アクセントカラー） */
  --generate-hover: #e2532a;
  --generate-soft: #fff3ee;
  --danger: #c62828;
  --danger-soft: #fff1f1;
  --radius: 20px;
  --radius-sm: 12px;
  --shadow: 0 1px 2px rgba(20, 24, 40, .04), 0 8px 28px rgba(20, 24, 40, .06);
  --font: "Inter", "Noto Sans JP", "Hiragino Sans", "Yu Gothic UI", "Meiryo", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background:
    radial-gradient(1200px 400px at 10% -10%, rgba(109, 74, 255, .08), transparent 70%),
    radial-gradient(1000px 400px at 100% -10%, rgba(242, 100, 58, .07), transparent 70%),
    var(--bg);
  background-repeat: no-repeat;
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

svg {
  fill: none; stroke: currentColor; stroke-width: 2;
  stroke-linecap: round; stroke-linejoin: round;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ヘッダー */
.app-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(255, 255, 255, .8);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; gap: 14px; min-height: 72px; }
.logo {
  width: 42px; height: 42px; border-radius: 12px; flex-shrink: 0;
  background: linear-gradient(135deg, var(--assistant), var(--generate));
  display: grid; place-items: center; color: #fff;
  box-shadow: 0 4px 12px rgba(109, 74, 255, .25);
}
.logo svg { width: 22px; height: 22px; }
.brand { min-width: 0; }
.app-header h1 {
  margin: 0; font-size: 19px; font-weight: 800; line-height: 1.3; letter-spacing: -.01em;
}
.tagline { margin: 0; font-size: 13px; color: var(--muted); line-height: 1.5; }
.badge-mock {
  margin-left: auto; font-size: 12px; font-weight: 500; padding: 5px 12px;
  border-radius: 999px; color: var(--text-sub); background: #eef0f5; white-space: nowrap;
}

/* 2カラムレイアウト */
.layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: start;
  gap: 32px;
  padding-top: 40px;
  padding-bottom: 48px;
}

.card {
  background: var(--card);
  border: 1px solid rgba(228, 231, 239, .7);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 36px;
  position: relative;
  overflow: hidden;
}

/* パネルごとの色分け（上部の細いライン） */
.card::before {
  content: ""; position: absolute; inset: 0 0 auto; height: 4px;
}
.panel-assistant::before { background: linear-gradient(90deg, var(--assistant), #9b7bff); }
.panel-generate::before  { background: linear-gradient(90deg, var(--generate), #ff9a6b); }

.panel-head { margin-bottom: 28px; }
.step {
  display: inline-block; font-family: "Inter", sans-serif;
  font-size: 11px; font-weight: 700; letter-spacing: .08em;
  padding: 3px 10px; border-radius: 999px; margin-bottom: 12px;
}
.panel-assistant .step { background: var(--assistant-soft); color: var(--assistant); }
.panel-generate  .step { background: var(--generate-soft);  color: var(--generate); }
.panel-head h2 {
  display: flex; align-items: center; gap: 12px;
  margin: 0 0 10px; font-size: 22px; font-weight: 700; line-height: 1.4;
  word-break: auto-phrase; text-wrap: balance;
}
.panel-icon {
  width: 40px; height: 40px; border-radius: 12px; flex-shrink: 0;
  display: grid; place-items: center;
}
.panel-icon svg { width: 22px; height: 22px; }
.panel-assistant .panel-icon { background: var(--assistant-soft); color: var(--assistant); }
.panel-generate  .panel-icon { background: var(--generate-soft);  color: var(--generate); }
.desc { margin: 0; color: var(--text-sub); font-size: 14px; }

/* 入力欄 */
.field { margin-bottom: 22px; }
.field > label:first-child {
  display: block; font-weight: 700; font-size: 14px; margin-bottom: 8px; color: var(--text);
}
select, textarea {
  width: 100%;
  padding: 12px 16px;
  font: inherit; font-size: 15px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--field-bg);
  color: var(--text);
  transition: border-color .15s, box-shadow .15s, background .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' viewBox='0 0 24 24' fill='none' stroke='%236b7183' stroke-width='2' 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;
  background-size: 18px;
}
textarea { resize: vertical; min-height: 120px; line-height: 1.7; }
textarea::placeholder { color: #868c9e; }
select:hover, textarea:hover { border-color: #cfd3de; }
select:focus, textarea:focus { outline: none; background-color: #fff; }
.panel-assistant select:focus, .panel-assistant textarea:focus {
  border-color: var(--assistant); box-shadow: 0 0 0 4px rgba(109, 74, 255, .12);
}
.panel-generate select:focus, .panel-generate textarea:focus {
  border-color: var(--generate); box-shadow: 0 0 0 4px rgba(242, 100, 58, .12);
}

.field-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.field-row .field > label:first-child { font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* アップロード */
.upload {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  padding: 32px 20px; text-align: center; cursor: pointer;
  border: 1.5px dashed var(--assistant-line); border-radius: 16px;
  background: linear-gradient(180deg, #faf8ff, var(--assistant-soft));
  transition: border-color .2s, background .2s;
}
.upload:hover, .upload.dragover { border-color: var(--assistant); background: var(--assistant-soft); }
.upload.dragover { border-style: solid; box-shadow: 0 0 0 4px rgba(109, 74, 255, .12); }
.upload:has(input:focus-visible) { outline: 3px solid rgba(109, 74, 255, .35); outline-offset: 3px; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.upload-icon {
  width: 52px; height: 52px; border-radius: 14px; margin-bottom: 8px;
  display: grid; place-items: center;
  background: #fff; color: var(--assistant);
  box-shadow: 0 2px 8px rgba(109, 74, 255, .12);
}
.upload-icon svg { width: 26px; height: 26px; }
.upload-text { font-weight: 700; font-size: 14px; color: var(--text); }
.upload-note { font-size: 12px; color: var(--muted); }
.upload-file { font-size: 13px; color: var(--assistant); font-weight: 700; word-break: break-all; }
.upload-file:empty { display: none; }
.upload-thumb {
  max-width: 100%; max-height: 180px; margin-top: 12px;
  border-radius: 10px; box-shadow: 0 2px 10px rgba(20, 24, 40, .1);
}

/* ボタン */
.btn {
  display: flex; align-items: center; justify-content: center;
  width: 100%; min-height: 56px;
  padding: 14px 20px; margin-top: 6px;
  font: inherit; font-size: 16px; font-weight: 700; color: #fff; letter-spacing: .02em;
  border: none; border-radius: 14px; cursor: pointer;
  transition: transform .12s, box-shadow .2s, background .2s, opacity .2s;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:focus-visible { outline: 3px solid rgba(109, 74, 255, .35); outline-offset: 3px; }
.btn:disabled { opacity: .7; cursor: wait; transform: none; }
.btn-assistant { background: var(--assistant); box-shadow: 0 8px 20px -6px rgba(109, 74, 255, .55); }
.btn-assistant:hover:not(:disabled) { background: var(--assistant-hover); }
.btn-generate { background: var(--generate); box-shadow: 0 8px 20px -6px rgba(242, 100, 58, .55); }
.btn-generate:hover:not(:disabled) { background: var(--generate-hover); }
.btn-generate:focus-visible { outline-color: rgba(242, 100, 58, .4); }

/* アシスタント回答 */
.result {
  margin-top: 28px;
  border: 1px solid var(--assistant-line);
  border-radius: 16px;
  overflow: hidden;
  background: #fff;
}
.result-head, .preview-head {
  display: flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: 14px;
}
.result-head svg, .preview-head svg { width: 18px; height: 18px; flex-shrink: 0; }
.result-head {
  background: var(--assistant-soft); color: var(--assistant);
  padding: 12px 20px;
}
.result-body { padding: 20px 22px; font-size: 15px; line-height: 1.85; }
.result-title { margin: 0 0 4px; font-weight: 700; }
.result-body ul { margin: 0; padding-left: 20px; }
.result-body li { margin-bottom: 6px; }
.result-body.answer { overflow-wrap: anywhere; }
.result-body.answer > :first-child { margin-top: 0; }
.result-body.answer > :last-child { margin-bottom: 0; }
.result-body.answer h3 {
  margin: 22px 0 8px; padding-left: 10px;
  font-size: 15px; font-weight: 700; line-height: 1.5;
  border-left: 3px solid var(--assistant);
}
.result-body.answer p { margin: 0 0 10px; }
.result-body.answer ul, .result-body.answer ol { margin: 0 0 12px; padding-left: 1.4em; }
.result-body.answer li::marker { color: var(--assistant); }
.result-body.answer strong { color: var(--text); background: linear-gradient(transparent 62%, var(--assistant-soft) 62%); }
.placeholder { margin: 0; color: var(--muted); font-size: 14px; }

/* 生成プレビュー */
.preview-head {
  margin: 32px 0 14px; padding-top: 24px;
  border-top: 1px solid var(--border); color: var(--generate);
}
.preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 16px;
}
.preview-card {
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  background: #fff;
  transition: box-shadow .2s, transform .2s;
}
.preview-card:hover { box-shadow: 0 6px 18px rgba(20, 24, 40, .08); }
.preview-meta {
  display: flex; justify-content: space-between; align-items: center; gap: 8px;
  padding: 8px 12px; font-size: 12px; color: var(--text-sub);
  border-bottom: 1px solid var(--border);
}
.preview-meta strong { color: var(--generate); font-family: "Inter", sans-serif; }
.preview-frame {
  aspect-ratio: 3 / 4;
  margin: 12px;
  display: grid; gap: 4px;
  border: 2px solid #2b2f3a;
  border-radius: 4px;
  padding: 4px;
  background: #fff;
  position: relative;
  overflow: hidden;
}
.preview-frame .koma { background: #f1f2f6; border: 1px solid #d3d7e0; }
.preview-label {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; justify-content: center; align-items: center;
  text-align: center; padding: 10px; font-size: 11px; line-height: 1.6; color: var(--muted);
  background: rgba(255, 255, 255, .75);
}
.preview-label b { color: var(--text); font-size: 12px; margin-bottom: 4px; }

.note { margin: 10px 0 0; font-size: 12px; color: var(--muted); text-align: center; }

/* エラー表示 */
.error {
  display: flex; align-items: flex-start; gap: 10px;
  margin-top: 16px; padding: 12px 16px;
  border-radius: var(--radius-sm); font-size: 14px; font-weight: 700; line-height: 1.6;
  background: var(--danger-soft); color: var(--danger); border: 1px solid #f5c9c9;
}
.error[hidden] { display: none; }
/* 他のアイコンと同じ線の太さの警告アイコン */
.error::before {
  content: ""; flex-shrink: 0; width: 18px; height: 18px; margin-top: 2px;
  background: currentColor;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='10'/%3E%3Cpath d='M12 8v4M12 16h.01'/%3E%3C/svg%3E") center / contain no-repeat;
          mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='10'/%3E%3Cpath d='M12 8v4M12 16h.01'/%3E%3C/svg%3E") center / contain no-repeat;
}

/* 処理中のボタン：スピナーを表示 */
.btn.is-loading { gap: 10px; }
.btn.is-loading::before {
  content: ""; width: 18px; height: 18px; flex-shrink: 0;
  border: 2.5px solid rgba(255, 255, 255, .4); border-top-color: #fff;
  border-radius: 50%; animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .btn.is-loading::before { animation-duration: 2.4s; } }

/* 生成画像 */
.preview-frame.has-image { padding: 0; display: block; border-width: 1px; border-color: var(--border); }
.preview-frame img { width: 100%; height: 100%; object-fit: contain; display: block; }
.preview-frame a { display: block; height: 100%; }
.preview-card.loading { border-color: var(--generate); box-shadow: 0 0 0 3px rgba(242, 100, 58, .12); }
.preview-card.loading .preview-label b::after { content: " …生成中"; color: var(--generate); }
.preview-card.failed .preview-label b { color: var(--danger); }

.app-footer {
  text-align: center; color: var(--muted); font-size: 12px;
  padding: 0 16px 40px;
}

/* タブレット */
@media (max-width: 960px) {
  .container { padding: 0 24px; }
  .layout { grid-template-columns: 1fr; max-width: 720px; gap: 24px; padding-top: 32px; }
  .preview-grid { grid-template-columns: repeat(2, 1fr); }
}

/* スマホ */
@media (max-width: 600px) {
  .container { padding: 0 16px; }
  .header-inner { min-height: 64px; gap: 12px; }
  .logo { width: 38px; height: 38px; }
  .app-header h1 { font-size: 17px; }
  .tagline { font-size: 12px; }
  .badge-mock { display: none; }
  .layout { gap: 20px; padding-top: 20px; padding-bottom: 32px; }
  .card { padding: 26px 20px; border-radius: 18px; }
  .panel-head { margin-bottom: 22px; }
  .panel-head h2 { font-size: 19px; gap: 10px; }
  .panel-icon { width: 36px; height: 36px; }
  .upload { padding: 24px 16px; }
  .field-row { grid-template-columns: 1fr; gap: 0; }
  .field-row .field > label:first-child { font-size: 14px; }
  select, textarea { font-size: 16px; } /* iOS の自動ズーム防止 */
  .result-body { padding: 18px; }
  .preview-grid { grid-template-columns: 1fr; gap: 16px; }
  .preview-frame { max-width: 300px; margin: 14px auto; }
}