/* ── リセット & カスタムプロパティ ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --font-sans: 'Noto Sans JP', 'Inter', system-ui, sans-serif;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --success: #16a34a;
  --success-light: #f0fdf4;
  --danger: #dc2626;
  --danger-light: #fef2f2;
  --warning: #f59e0b;
  --warning-light: #fffbeb;
  --text: #1e293b;
  --text-muted: #64748b;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --radius: 8px;
  --radius-sm: 4px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-lg: 0 4px 12px rgba(0,0,0,0.12);
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
}

/* ── ヘッダー ── */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 24px;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.app-header h1 {
  font-size: 18px;
  font-weight: 700;
  white-space: nowrap;
}
.header-actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.header-actions .btn {
  white-space: nowrap;
}

/* ── タブバー ── */
.tab-bar {
  display: flex;
  gap: 0;
  background: var(--card-bg);
  border-bottom: 2px solid var(--border);
  padding: 0 24px;
}
.tab-item {
  padding: 10px 20px;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color 0.15s, border-color 0.15s;
  font-family: var(--font-sans);
}
.tab-item:hover { color: var(--text); }
.tab-item.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* ── タブパネル ── */
.tab-panel {
  display: none;
  padding: 20px 24px;
  max-width: 1400px;
  margin: 0 auto;
}
.tab-panel.active { display: block; }

/* ── カード ── */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  margin-bottom: 16px;
}
.card h2 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.card h3 {
  font-size: 13px;
  font-weight: 600;
  margin: 12px 0 6px;
  color: var(--text-muted);
}

/* ── グリッドレイアウト ── */
.panel-grid { display: grid; gap: 16px; }
.two-col { grid-template-columns: 1fr 1fr; }
@media (max-width: 960px) { .two-col { grid-template-columns: 1fr; } }

.form-grid {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 6px 12px;
  align-items: center;
}
.form-grid.four-col {
  grid-template-columns: 160px 1fr 150px 1fr;
}
.form-grid label {
  font-size: 13px;
  color: var(--text-muted);
  white-space: nowrap;
}

/* ── 入力 ── */
input[type="text"], input[type="number"], select, textarea {
  font-family: var(--font-sans);
  font-size: 14px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card-bg);
  color: var(--text);
  outline: none;
  transition: border-color 0.15s;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(37,99,235,0.15);
}
.input-num { text-align: right; width: 100%; }

/* ── ボタン ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 7px 16px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, box-shadow 0.15s;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-hover); }
.btn-outline {
  background: var(--card-bg);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-outline:hover { background: var(--bg); }
.btn-danger {
  background: var(--danger);
  color: #fff;
}
.btn-danger:hover { background: #b91c1c; }
.btn-sm {
  padding: 4px 10px;
  font-size: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  cursor: pointer;
}
.btn-sm:hover { background: var(--border); }
.btn-icon {
  background: none;
  border: none;
  cursor: pointer;
  padding: 2px 6px;
  font-size: 16px;
  line-height: 1;
  border-radius: var(--radius-sm);
}
.btn-icon:hover { background: var(--bg); }

/* ── ツールバー ── */
.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.toolbar label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-muted);
}

.panel-actions {
  margin-top: 12px;
  display: flex;
  gap: 8px;
}

/* ── テーブル ── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.data-table th, .data-table td {
  padding: 6px 10px;
  border: 1px solid var(--border);
  text-align: left;
}
.data-table th {
  background: var(--bg);
  font-weight: 600;
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
}
.data-table td.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.data-table.compact th, .data-table.compact td {
  padding: 4px 8px;
}
.data-table input[type="number"],
.data-table input[type="text"],
.data-table select {
  width: 100%;
  padding: 3px 6px;
  font-size: 13px;
  border: 1px solid var(--border);
}

/* ── サマリー行 ── */
.summary-row {
  margin-top: 12px;
  padding: 8px 12px;
  background: var(--primary-light);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
}

/* ── 部門カード ── */
.dept-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 12px;
  box-shadow: var(--shadow);
}
.dept-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}
.dept-card-header h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin: 0;
}
.dept-card-body {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 6px 16px;
  font-size: 13px;
}
.dept-card-body .label {
  color: var(--text-muted);
}
.dept-card-body .value {
  font-weight: 500;
  text-align: right;
}
.dept-labor-row {
  grid-column: 1 / -1;
  display: flex;
  gap: 12px;
  align-items: baseline;
}

/* ── 製品カード ── */
.product-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 12px;
  box-shadow: var(--shadow);
}
.product-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.product-card-header h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin: 0;
}

/* ── 原価結果 ── */
.cost-result {
  padding: 12px;
  background: var(--success-light);
  border: 1px solid #bbf7d0;
  border-radius: var(--radius-sm);
  margin-top: 12px;
}
.cost-result .cost-line {
  display: flex;
  justify-content: space-between;
  padding: 3px 0;
  font-size: 13px;
}
.cost-result .cost-subtotal {
  font-weight: 600;
  font-size: 14px;
  padding: 4px 8px;
  margin-top: 4px;
  border-radius: var(--radius-sm);
}
.cost-result .cost-subtotal.direct {
  background: #eff6ff;
  border-left: 3px solid #60a5fa;
}
.cost-result .cost-subtotal.manufacturing {
  background: #fef3c7;
  border-left: 3px solid #fbbf24;
}
.cost-result .cost-indent {
  padding-left: 16px;
  font-size: 12px;
  color: var(--text-muted);
}
.cost-result .cost-total {
  font-weight: 700;
  font-size: 15px;
  border-top: 2px solid #86efac;
  margin-top: 6px;
  padding-top: 6px;
  background: var(--success-light);
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  border-left: 3px solid #22c55e;
}
.cost-result .profit-rate {
  font-size: 14px;
  font-weight: 600;
}
.profit-positive { color: var(--success); }
.profit-negative { color: var(--danger); }

/* ── モーダル ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  display: grid;
  place-items: center;
  z-index: 100;
  overflow-y: auto;
  padding: 20px;
}
.modal {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 24px;
  width: 100%;
  max-width: 800px;
  max-height: 90vh;
  overflow-y: auto;
}
.modal h2 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
}
.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

/* ── トースト ── */
#toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.toast {
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  animation: toast-in 0.25s ease-out;
  max-width: 360px;
}
.toast.success { background: var(--success); color: #fff; }
.toast.error { background: var(--danger); color: #fff; }
.toast.info { background: var(--primary); color: #fff; }

@keyframes toast-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── システム設定 ── */
.settings-card {
  border-left: 4px solid var(--primary);
}
.settings-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: flex-start;
}
.settings-grid > .setting-group:first-child {
  flex: 1 1 0;
  min-width: 420px;
}
.settings-grid > .setting-group:last-child {
  flex: 0 0 auto;
}

.setting-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.setting-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
}

/* ── 方式セレクター ── */
.level-selector {
  display: flex;
  flex-wrap: nowrap;
  gap: 6px;
}
.level-btn {
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  padding: 8px 10px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
  cursor: pointer;
  transition: all 0.15s;
  font-family: var(--font-sans);
  text-align: left;
}
.level-btn:hover {
  border-color: var(--border-strong);
  background: var(--bg);
}
.level-btn.active {
  border-color: var(--primary);
  background: var(--primary-light);
}
.level-badge {
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
}
.level-name {
  font-size: 10px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
}
.level-desc {
  font-size: 10px;
  color: var(--text-muted);
}

/* ── トグルスイッチ ── */
.toggle-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}
.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}
.toggle-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background-color: var(--border-strong);
  border-radius: 24px;
  transition: 0.2s;
}
.toggle-slider::before {
  content: "";
  position: absolute;
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background: white;
  border-radius: 50%;
  transition: 0.2s;
}
.toggle-switch input:checked + .toggle-slider {
  background-color: var(--primary);
}
.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(20px);
}

.freight-rate-field {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 4px;
}
.freight-rate-field label {
  font-size: 13px;
  color: var(--text-muted);
  white-space: nowrap;
}

/* ── 方式1レート表示 ── */
#lv1-rate-summary {
  font-size: 14px;
}

/* ── 方式3 ダッシュボード ── */
.dashboard-lv3 .cost-breakdown {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 8px;
}
@media (max-width: 768px) { .dashboard-lv3 .cost-breakdown { grid-template-columns: 1fr; } }

.profit-box {
  padding: 12px;
  border-radius: var(--radius-sm);
  text-align: center;
}
.profit-box.marginal {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
}
.profit-box.manufacturing {
  background: #fef3c7;
  border: 1px solid #fde68a;
}
.profit-box.operating {
  background: var(--success-light);
  border: 1px solid #bbf7d0;
}
.profit-box .profit-label {
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.profit-box .profit-value {
  font-size: 18px;
  font-weight: 700;
}

/* ── ユーティリティ ── */
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-danger { color: var(--danger); }
.mt-8 { margin-top: 8px; }
.mt-12 { margin-top: 12px; }
.mb-8 { margin-bottom: 8px; }
.gap-8 { gap: 8px; }

/* ── 使い方ガイド ── */
#tab-guide p {
  font-size: 13px;
  line-height: 1.8;
  color: var(--text);
  margin: 6px 0 12px;
}
#tab-guide h3 {
  margin-top: 20px;
}

/* イントロ */
.guide-intro p {
  font-size: 14px;
}

/* フロー図 */
.guide-flow {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin: 12px 0;
}
.guide-flow-step {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--primary-light);
  border: 1px solid #bfdbfe;
  border-radius: var(--radius);
  padding: 12px 16px;
  flex: 1;
  min-width: 180px;
}
.guide-flow-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: 16px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
}
.guide-flow-body {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.guide-flow-body strong {
  font-size: 14px;
  color: var(--primary);
}
.guide-flow-body span {
  font-size: 11px;
  color: var(--text-muted);
}
.guide-flow-arrow {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-muted);
}

/* コールアウト */
.guide-callout {
  border-radius: var(--radius);
  padding: 12px 16px;
  margin: 12px 0;
  font-size: 13px;
  line-height: 1.7;
}
.guide-callout-info {
  background: var(--primary-light);
  border-left: 4px solid var(--primary);
}
.guide-callout-warning {
  background: var(--warning-light);
  border-left: 4px solid var(--warning);
}
.guide-callout-danger {
  background: var(--danger-light);
  border-left: 4px solid var(--danger);
}

/* 具体例ボックス */
.guide-example {
  background: #f1f5f9;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin: 12px 0;
  font-size: 13px;
  line-height: 1.7;
}

/* 計算式ボックス */
.guide-formula {
  background: #1e293b;
  color: #e2e8f0;
  border-radius: var(--radius);
  padding: 12px 16px;
  margin: 12px 0;
  font-size: 13px;
  line-height: 1.8;
  font-family: 'SFMono-Regular', Consolas, monospace;
}
.guide-formula strong {
  color: #38bdf8;
}

@media (max-width: 768px) {
  .guide-flow {
    flex-direction: column;
  }
  .guide-flow-arrow {
    transform: rotate(90deg);
  }
  .guide-flow-step {
    width: 100%;
  }
}

.guide-screenshot {
  margin: 12px 0 20px;
  text-align: center;
}
.guide-screenshot img {
  max-width: 100%;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* ── カバーページ ── */
.cover-page {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: linear-gradient(135deg, #1e3a5f 0%, #0c1f3d 100%);
  display: grid;
  place-items: center;
  color: #fff;
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.cover-page.hide {
  opacity: 0;
  transform: scale(1.08);
  pointer-events: none;
}

/* 登場アニメーション */
.cover-logo {
  animation: cover-pop 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) 0.2s both;
}
.cover-title {
  animation: cover-rise 0.6s ease-out 0.5s both;
}
.cover-sub {
  animation: cover-rise 0.6s ease-out 0.7s both;
}
.cover-features {
  animation: cover-rise 0.6s ease-out 0.9s both;
}
.cover-cta {
  animation: cover-rise 0.6s ease-out 1.1s both;
}
.cover-note {
  animation: cover-rise 0.5s ease-out 1.3s both;
}
@keyframes cover-pop {
  from { opacity: 0; transform: scale(0.3) rotate(-10deg); }
  to { opacity: 1; transform: scale(1) rotate(0deg); }
}
@keyframes cover-rise {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.cover-content {
  text-align: center;
  padding: 24px;
  max-width: 600px;
}
.cover-logo {
  width: 96px;
  height: 96px;
  margin: 0 auto 28px;
  animation: cover-pop 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) 0.2s both;
}
.cover-logo svg {
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 8px 24px rgba(37, 99, 235, 0.5));
}
.cover-title {
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 900;
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}
.cover-sub {
  font-size: clamp(14px, 2.5vw, 17px);
  color: #94a3b8;
  line-height: 1.8;
  margin-bottom: 28px;
}
.cover-features {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 32px;
}
.cover-features span {
  padding: 5px 14px;
  border: 1px solid #2d4a6f;
  border-radius: 20px;
  font-size: 13px;
  color: #94a3b8;
}
.cover-cta {
  display: inline-block;
  padding: 14px 40px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}
.cover-cta:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.5);
}
.cover-cta:active {
  transform: scale(0.97);
}
.cover-note {
  margin-top: 12px;
  font-size: 12px;
  color: #4a6d8c;
}
.cover-credit {
  position: absolute;
  bottom: 20px;
  font-size: 12px;
  color: #2d4a6f;
}

/* ── tabular-nums 統一 ── */
.input-num,
.cost-result,
.profit-box .profit-value,
.data-table td,
.summary-row,
.dept-card-body .value {
  font-variant-numeric: tabular-nums;
}

/* ── フッター ── */
.app-footer {
  margin-top: 40px;
  padding: 16px 24px;
  border-top: 1px solid var(--border-strong);
  background: #f1f5f9;
}
.footer-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12px;
  color: var(--text-muted);
  flex-wrap: wrap;
}
.footer-version {
  background: var(--primary);
  color: #fff;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
}
.footer-note {
  margin-left: auto;
}
@media (max-width: 768px) {
  .footer-note { margin-left: 0; }
}

/* ── ローディングオーバーレイ ── */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(255,255,255,0.85);
  display: grid;
  place-items: center;
  z-index: 300;
}
.loading-content {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}
.loading-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}
.loading-content p {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
}

/* ── オンボーディングモーダル ── */
.onboarding-modal {
  text-align: center;
  max-width: 520px;
}
.onboarding-modal h2 {
  border-bottom: none;
  font-size: 20px;
  margin-bottom: 8px;
}
.onboarding-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: var(--primary);
  color: #fff;
  font-size: 36px;
  font-weight: 700;
  display: grid;
  place-items: center;
  margin: 0 auto 16px;
}
.onboarding-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

/* ── 原価構成バーチャート ── */
.cost-bar-track {
  display: flex;
  height: 28px;
  border-radius: 6px;
  overflow: hidden;
  background: #f1f5f9;
  border: 1px solid var(--border);
}
.cost-bar-seg {
  height: 100%;
  min-width: 2px;
  transition: width 0.3s ease;
}
.cost-bar-seg:first-child {
  border-radius: 5px 0 0 5px;
}
.cost-bar-seg:last-child {
  border-radius: 0 5px 5px 0;
}
.cost-bar-over {
  border-left: 2px solid #fff;
}
.cost-bar-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}
.cost-bar-legend-item {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  color: var(--text-muted);
}
.cost-bar-dot {
  width: 10px;
  height: 10px;
  border-radius: 3px;
  flex-shrink: 0;
}

/* ── ヘルプアイコン ── */
.help-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--border-strong);
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  margin-left: 4px;
  vertical-align: middle;
  flex-shrink: 0;
  transition: background 0.15s;
}
.help-icon:hover {
  background: var(--primary);
  color: #fff;
}
.help-popup {
  position: fixed;
  z-index: 250;
  max-width: 360px;
  padding: 14px 16px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text);
}
.help-popup strong {
  display: block;
  margin-bottom: 4px;
  font-size: 14px;
}
.help-popup .help-example {
  margin-top: 6px;
  padding: 6px 10px;
  background: var(--bg);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text-muted);
}