:root {
  --bg: #ffffff;
  --text: rgba(18, 18, 18, 0.92);
  --text-muted: rgba(18, 18, 18, 0.48);
  --border: rgba(18, 18, 18, 0.15);
  --border-strong: rgba(18, 18, 18, 0.85);
  --accent: #121212;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Helvetica Neue", Helvetica, Arial, "Hiragino Sans", sans-serif;
  font-size: 15px;
  line-height: 1.7;
  letter-spacing: 0.01em;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ヘッダー */
.site-header {
  border-bottom: 1px solid var(--border);
  padding: 24px 0;
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-decoration: none;
  color: var(--text);
}

.logo sup {
  font-size: 9px;
}

.nav-links a {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  text-decoration: none;
  margin-left: 24px;
}

.nav-links a:hover {
  color: var(--text);
}

/* 汎用レイアウト */
main {
  padding: 72px 0 120px;
}

.eyebrow {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0 0 12px;
}

h1 {
  font-size: 32px;
  font-weight: 400;
  letter-spacing: 0.01em;
  margin: 0 0 8px;
}

h2 {
  font-size: 20px;
  font-weight: 400;
  letter-spacing: 0.01em;
  margin: 48px 0 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

p.lead {
  color: var(--text-muted);
  font-size: 14px;
  margin: 0 0 40px;
}

.jp {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.02em;
  margin-top: 3px;
}

/* ボタン */
.btn {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 14px 32px;
  border: 1px solid var(--border-strong);
  color: var(--text);
  background: transparent;
  cursor: pointer;
  border-radius: 0;
  font-family: inherit;
}

.btn:hover {
  background: var(--accent);
  color: #fff;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  opacity: 0.85;
}

.btn-ghost {
  border-color: transparent;
  color: var(--text-muted);
  padding-left: 0;
}

.btn-ghost:hover {
  background: transparent;
  color: var(--text);
}

/* フォーム */
.field {
  margin-bottom: 28px;
}

.field label {
  display: block;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.field input[type="text"],
.field input[type="email"],
.field input[type="number"],
.field select,
.field textarea {
  width: 100%;
  padding: 12px 0;
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border);
  border-radius: 0;
  outline: none;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-bottom-color: var(--border-strong);
}

.field .hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 6px;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

fieldset {
  border: 1px solid var(--border);
  padding: 24px;
  margin: 0 0 28px;
}

legend {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0 8px;
}

/* 動的リスト（抽出項目） */
.dynamic-row {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 16px;
  align-items: end;
  margin-bottom: 16px;
}

.dynamic-row-3 {
  display: grid;
  grid-template-columns: 2fr 2fr 1fr auto auto;
  gap: 16px;
  align-items: end;
  margin-bottom: 16px;
}

.field-checkbox label {
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  margin-bottom: 10px;
}

.field-checkbox input[type="checkbox"] {
  width: auto;
}

/* フォルダ選択 */
.folder-picker {
  display: flex;
  gap: 12px;
  align-items: center;
}

.folder-picker input {
  flex: 1;
}

.btn-browse {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: none;
  border: 1px solid var(--border-strong);
  padding: 10px 16px;
  cursor: pointer;
  white-space: nowrap;
  font-family: inherit;
  color: var(--text);
}

.btn-browse:hover {
  background: var(--accent);
  color: #fff;
}

.folder-browser-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(18, 18, 18, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.folder-browser-panel {
  background: #fff;
  width: 420px;
  max-height: 70vh;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border-strong);
}

.folder-browser-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.folder-browser-back {
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}

.folder-browser-back:hover {
  text-decoration: underline;
}

.folder-browser-list {
  list-style: none;
  margin: 0;
  padding: 0;
  overflow-y: auto;
  flex: 1;
}

.folder-item {
  padding: 12px 20px;
  font-size: 14px;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
}

.folder-item:hover {
  background: rgba(18, 18, 18, 0.04);
}

.folder-up {
  color: var(--text-muted);
}

.folder-empty, .loading {
  padding: 20px;
  font-size: 13px;
  color: var(--text-muted);
}

.folder-browser-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  padding: 16px 20px;
  border-top: 1px solid var(--border);
}

.remove-row {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  background: none;
  border: none;
  cursor: pointer;
  padding: 12px 0;
}

.add-row {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: none;
  border: none;
  border-bottom: 1px solid var(--border-strong);
  padding: 0 0 2px;
  cursor: pointer;
  color: var(--text);
}

/* テーブル（ルール一覧） */
table {
  width: 100%;
  border-collapse: collapse;
}

th {
  text-align: left;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 400;
  padding: 0 0 12px;
  border-bottom: 1px solid var(--border-strong);
}

td {
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

td a {
  color: var(--text);
}

.status-badge {
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 8px;
  border: 1px solid var(--border-strong);
}

.empty-state {
  color: var(--text-muted);
  font-size: 14px;
  padding: 48px 0;
  text-align: center;
  border: 1px dashed var(--border);
}

.flash {
  font-size: 13px;
  padding: 14px 16px;
  border: 1px solid var(--border-strong);
  margin-bottom: 32px;
}