/* ==========================================================================
   AI法人プラン比較ウォッチ -- style
   NOVELデザインガイドライン準拠（正本: templates/brand_design_guideline.md）
   - NOVEL Blue #007ECA / Cyan #74D8EC / Deep Navy #004873 / Ink #080808
   - シグネチャーグラデ 135deg固定・角丸4px・ドロップシャドウ禁止・暖色禁止
   - Noto Sans JP（システムフォントフォールバック。CDN不使用）
   - CSS変数は assets/tokens.css（--nvl-*）を使用
   ========================================================================== */

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;
  font-weight: 400;
  color: var(--nvl-ink);
  background: #fff;
  font-size: 15px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--nvl-blue); }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

.skip-link {
  position: absolute; left: -999px; top: auto;
  background: #fff; color: var(--nvl-blue); padding: 10px 16px; z-index: 200;
}
.skip-link:focus { left: 12px; top: 12px; }

/* ---- ヘッダー / ヒーロー -------------------------------------------------- */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--nvl-border);
  padding: 40px 0 36px;
}
.brand {
  margin: 0 0 18px;
  font-family: var(--nvl-font-en);
  font-weight: 500;
  letter-spacing: 0.22em;
  font-size: 13px;
  color: var(--nvl-blue);
}
.hero-title {
  margin: 0 0 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.hero-en {
  font-family: var(--nvl-font-en);
  font-weight: 500;
  font-size: 44px;
  letter-spacing: 0.02em;
  line-height: 1.15;
}
.hero-ja {
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--nvl-text);
}
.hero-copy {
  margin: 0 0 18px;
  font-size: 17px;
  font-weight: 400;
  color: var(--nvl-text);
  letter-spacing: 0.03em;
}
.hero-check {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 18px;
  background: var(--nvl-tint-blue);
  border: 1px solid var(--nvl-border);
  border-radius: var(--nvl-radius);
}
.hero-check-label {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--nvl-text);
}
.hero-check-date {
  font-family: var(--nvl-font-en);
  font-size: 20px;
  font-weight: 500;
  color: var(--nvl-navy);
}
.hero-note {
  margin: 16px 0 0;
  font-size: 13px;
  color: var(--nvl-text);
}

/* ---- 共通パネル ----------------------------------------------------------- */
main { padding: 40px 0 80px; }
.panel {
  background: #fff;
  border: 1px solid var(--nvl-border);
  border-radius: var(--nvl-radius);
  padding: 28px 24px;
  margin-bottom: 24px;
}
.panel-title {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--nvl-ink);
}
.panel-desc {
  margin: 0 0 18px;
  font-size: 13.5px;
  color: var(--nvl-text);
  line-height: 1.8;
}
.panel-note {
  margin: 14px 0 0;
  font-size: 12.5px;
  color: var(--nvl-text);
  line-height: 1.8;
}
.empty-note {
  font-size: 13.5px;
  color: var(--nvl-text);
}

/* ---- 要件フィルタ（チップ型チェックボックス） ----------------------------- */
.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.filter-chip {
  position: relative;
  display: inline-flex;
}
.filter-chip input {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  cursor: pointer;
}
.filter-chip span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  border: 1px solid var(--nvl-border);
  border-radius: var(--nvl-radius-pill);
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--nvl-text);
  background: #fff;
  transition: background-color .15s, border-color .15s, color .15s;
}
.filter-chip span::before {
  content: "";
  width: 14px;
  height: 14px;
  border-radius: 3px;
  border: 1.5px solid var(--nvl-border);
  background: #fff;
  flex: 0 0 auto;
}
.filter-chip input:checked + span {
  background: var(--nvl-tint-blue);
  border-color: var(--nvl-blue);
  color: var(--nvl-navy);
}
.filter-chip input:checked + span::before {
  background-color: var(--nvl-blue);
  border-color: var(--nvl-blue);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 14 14'%3E%3Cpath d='M3 7.5l2.5 2.5L11 4.5' fill='none' stroke='%23fff' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-size: 11px 11px;
  background-position: center;
  background-repeat: no-repeat;
}
.filter-chip input:focus-visible + span {
  outline: 2px solid var(--nvl-blue);
  outline-offset: 3px;
}
.filter-chip input:focus:not(:focus-visible) + span {
  outline: none;
}

/* ---- 円換算トグル ---------------------------------------------------------- */
.currency-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px 28px;
}
.switch {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  position: relative;
}
.switch input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
}
.switch-track {
  width: 40px;
  height: 22px;
  border-radius: var(--nvl-radius-pill);
  background: var(--nvl-border);
  position: relative;
  transition: background-color .15s;
  flex: 0 0 auto;
}
.switch-track::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  transition: transform .15s;
}
.switch input:checked + .switch-track {
  background: var(--nvl-blue);
}
.switch input:checked + .switch-track::after {
  transform: translateX(18px);
}
.switch input:focus-visible + .switch-track {
  outline: 2px solid var(--nvl-blue);
  outline-offset: 2px;
}
.switch-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--nvl-ink);
}
.rate-input-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--nvl-text);
}
.rate-input {
  width: 80px;
  padding: 7px 10px;
  border: 1px solid var(--nvl-border);
  border-radius: var(--nvl-radius);
  font-size: 14px;
  font-family: var(--nvl-font-en);
  color: var(--nvl-ink);
}
.rate-input:focus { outline: 2px solid var(--nvl-blue); outline-offset: 1px; }
.link-btn {
  background: none;
  border: none;
  padding: 0;
  color: var(--nvl-blue);
  font-size: 13.5px;
  cursor: pointer;
  text-decoration: underline;
}
.secondary-btn {
  display: inline-block;
  background: #fff;
  color: var(--nvl-blue);
  border: 1px solid var(--nvl-blue);
  border-radius: var(--nvl-radius);
  font: 500 14px "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;
  letter-spacing: 0.05em;
  padding: 10px 28px;
  cursor: pointer;
}
.secondary-btn:hover { background: var(--nvl-tint-blue); }

/* ---- 比較表（PC） ---------------------------------------------------------- */
.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--nvl-border);
  border-radius: var(--nvl-radius);
  -webkit-overflow-scrolling: touch;
}
.plan-table {
  border-collapse: collapse;
  width: 100%;
  min-width: 640px;
}
.plan-table th, .plan-table td {
  padding: 13px 16px;
  border-bottom: 1px solid var(--nvl-border);
  text-align: left;
  vertical-align: top;
  font-size: 14px;
}
.plan-table thead th {
  background: var(--nvl-bg-light);
  font-weight: 500;
  white-space: nowrap;
}
.plan-table tbody tr:last-child th,
.plan-table tbody tr:last-child td {
  border-bottom: none;
}
.row-head, .row-label {
  position: sticky;
  left: 0;
  background: #fff;
  border-right: 1px solid var(--nvl-border);
  font-weight: 500;
  z-index: 2;
  min-width: 128px;
}
.plan-table thead .row-head {
  background: var(--nvl-bg-light);
  z-index: 3;
}
.plan-col-head {
  min-width: 180px;
}
.plan-col-vendor {
  display: block;
  font-family: var(--nvl-font-en);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--nvl-text);
  text-transform: uppercase;
}
.plan-col-name {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--nvl-ink);
  margin-top: 2px;
}
.cell {
  cursor: pointer;
  transition: background-color .15s, opacity .15s;
}
.cell:hover, .cell:focus-visible {
  background: var(--nvl-tint-blue);
  outline: none;
}
.cell:focus-visible {
  box-shadow: inset 0 0 0 2px var(--nvl-blue);
}
.cell-value {
  display: block;
}
.cell-sub {
  display: block;
  font-size: 12px;
  color: var(--nvl-text);
  margin-top: 2px;
}
.unconfirmed {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--nvl-text);
  font-size: 13px;
  font-style: normal;
}
.unconfirmed::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--nvl-border);
  display: inline-block;
}

/* 要件フィルタによるハイライト / グレーアウト */
.col-match { background: var(--nvl-tint-blue); }
.plan-table thead th.col-match { background: rgba(0, 126, 202, 0.14); }
.col-nomatch { opacity: 0.4; filter: grayscale(60%); }

/* ---- 比較表（モバイル：プラン別カード切替） -------------------------------- */
.mobile-cards { display: none; }
.mobile-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  margin-bottom: 12px;
  -webkit-overflow-scrolling: touch;
}
.mobile-tab {
  flex: 0 0 auto;
  padding: 9px 16px;
  border: 1px solid var(--nvl-border);
  border-radius: var(--nvl-radius-pill);
  background: #fff;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--nvl-text);
  cursor: pointer;
  white-space: nowrap;
}
.mobile-tab[aria-selected="true"] {
  background: var(--nvl-gradient);
  border-color: transparent;
  color: #fff;
}
.mobile-tab.col-nomatch { opacity: 0.55; }
.plan-card { display: none; border: 1px solid var(--nvl-border); border-radius: var(--nvl-radius); overflow: hidden; }
.plan-card.is-active { display: block; }
.plan-card-head { padding: 14px 16px; background: var(--nvl-bg-light); }
.plan-card-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--nvl-border);
  cursor: pointer;
}
.plan-card-row:last-child { border-bottom: none; }
.plan-card-row:hover, .plan-card-row:focus-visible { background: var(--nvl-tint-blue); outline: none; }
.plan-card-row-label {
  font-size: 13px;
  color: var(--nvl-text);
  flex: 0 0 96px;
}
.plan-card-row-value {
  font-size: 14px;
  text-align: right;
  flex: 1;
}
.plan-card.col-nomatch { opacity: 0.5; filter: grayscale(60%); }

/* ---- 更新履歴 -------------------------------------------------------------- */
.changelog-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.changelog-item {
  display: flex;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--nvl-border);
}
.changelog-item:first-child { padding-top: 0; }
.changelog-date {
  flex: 0 0 92px;
  font-family: var(--nvl-font-en);
  font-size: 13px;
  color: var(--nvl-text);
  padding-top: 2px;
}
.changelog-body { flex: 1; min-width: 0; }
.changelog-service {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--nvl-navy);
  background: var(--nvl-tint-blue);
  border-radius: var(--nvl-radius);
  padding: 2px 8px;
  margin-bottom: 6px;
}
.changelog-summary { margin: 0 0 4px; font-size: 14.5px; font-weight: 500; }
.changelog-impact { margin: 0 0 6px; font-size: 13.5px; color: var(--nvl-text); }
.changelog-source { font-size: 12.5px; }

/* ---- この表の見方 ---------------------------------------------------------- */
.glossary-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px 28px;
}
.term h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--nvl-ink);
}
.term p {
  margin: 0;
  font-size: 13.5px;
  color: var(--nvl-text);
  line-height: 1.8;
}

/* ---- フッター -------------------------------------------------------------- */
.site-footer { background: var(--nvl-bg-dark); color: #fff; }
.foot-inner { padding: 44px 20px 40px; }
.foot-cross { display: flex; flex-wrap: wrap; gap: 6px 20px; margin-bottom: 20px; }
.foot-cross-t {
  width: 100%;
  font-family: var(--nvl-font-en);
  font-weight: 400;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: #fff;
  opacity: 0.7;
  margin-bottom: 4px;
}
.foot-cross a { color: #fff; text-decoration: none; font-size: 13.5px; font-weight: 500; letter-spacing: 0.03em; }
.foot-cross a:hover { text-decoration: underline; }
.foot-meta {
  font-size: 13px;
  padding-top: 16px;
  border-top: 1px solid var(--nvl-line-on-dark);
}
.foot-meta a { color: #fff; }
.foot-note { font-size: 12px; color: #fff; opacity: 0.7; margin: 12px 0 0; line-height: 1.8; }

/* ---- 詳細ポップ（モーダル） -------------------------------------------------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(8, 8, 8, 0.45);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: 100;
  padding: 0;
}
.modal-backdrop[hidden] {
  display: none;
}
.modal {
  position: relative;
  background: #fff;
  width: 100%;
  max-width: 460px;
  max-height: 82vh;
  overflow-y: auto;
  border-radius: var(--nvl-radius) var(--nvl-radius) 0 0;
  padding: 28px 24px 32px;
}
.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--nvl-border);
  background: #fff;
  cursor: pointer;
  font-size: 14px;
  color: var(--nvl-text);
}
.modal-eyebrow {
  font-family: var(--nvl-font-en);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--nvl-blue);
  text-transform: uppercase;
  margin: 0 0 6px;
}
.modal-title { margin: 0 0 4px; font-size: 19px; font-weight: 700; }
.modal-sub { margin: 0 0 18px; font-size: 13.5px; color: var(--nvl-text); }
.modal-value {
  padding: 14px 16px;
  background: var(--nvl-tint-blue);
  border-radius: var(--nvl-radius);
  font-size: 16px;
  font-weight: 500;
  margin-bottom: 14px;
}
.modal-section { margin-bottom: 14px; }
.modal-section-h { margin: 0 0 4px; font-size: 12.5px; letter-spacing: 0.05em; color: var(--nvl-text); }
.modal-section p { margin: 0; font-size: 14px; line-height: 1.8; }
.modal-source a { word-break: break-all; }
.modal-unconfirmed {
  padding: 14px 16px;
  background: var(--nvl-bg-light);
  border-radius: var(--nvl-radius);
  font-size: 13.5px;
  color: var(--nvl-text);
  line-height: 1.8;
  margin-bottom: 14px;
}

@media (min-width: 560px) {
  .modal-backdrop { align-items: center; padding: 20px; }
  .modal { border-radius: var(--nvl-radius); }
}

/* ---- レスポンシブ ----------------------------------------------------------- */
@media (max-width: 760px) {
  .site-header { padding: 32px 0 28px; }
  .hero-en { font-size: 32px; }
  .hero-copy { font-size: 15px; }
  main { padding: 28px 0 60px; }
  .panel { padding: 22px 18px; }
  .table-scroll { display: none; }
  .mobile-cards { display: block; }
  .glossary-grid { grid-template-columns: 1fr; }
  .currency-controls { gap: 14px 20px; }
  .changelog-date { flex-basis: 76px; }
}

@media (max-width: 400px) {
  .hero-en { font-size: 27px; }
}