/* excel_hogushi styles — NOVELデザインガイドライン準拠（常時ライト・角丸4px・影なし）
   ・ヒーローに英語ラベル＋日本語見出しの2段構え（NOVEL型）
   ・信頼バッジは strong + small の2段（paste_checker と同じ密度）
   ・アクセントはグラデ #007ECA→#74D8EC（135deg固定）、Orangeは警告のみ差し色
   ・すべてのインタラクションに 150〜180ms の control transition */

/* tokens.css は配布物で触らない。ここでフォントスタックだけ補強（Notoが無い環境でも品位を保つ）。 */
:root {
  --nvl-font-ja: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic UI", "Meiryo", sans-serif;
  --nvl-font-en: "Outfit", "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Hiragino Sans", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--nvl-font-ja);
  color: var(--nvl-ink);
  background: #fff;
  line-height: 1.7;
  font-size: 16px;
  letter-spacing: .02em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}
a { color: var(--nvl-blue); }
::selection { background: rgba(0, 126, 202, .18); }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 40px; }
@media (max-width: 767px) { .wrap { padding: 0 20px; } }

/* ---- header ---- */
header.site {
  border-bottom: 1px solid var(--nvl-border);
  background: #fff;
}
header.site .in {
  max-width: 1080px; margin: 0 auto; padding: 16px 40px;
  display: flex; align-items: center; gap: 24px;
}
.brand {
  font-family: var(--nvl-font-en);
  font-weight: 500; font-size: 18px; letter-spacing: .05em;
  text-decoration: none; color: var(--nvl-ink);
}
.brand .thin { font-weight: 200; }
header.site nav { margin-left: auto; display: flex; gap: 28px; }
header.site nav a {
  font-size: 13px; font-weight: 500; letter-spacing: .1em;
  color: var(--nvl-ink); text-decoration: none;
  transition: color .15s ease;
}
header.site nav a:hover { color: var(--nvl-blue); }
@media (max-width: 767px) {
  header.site .in { padding: 14px 20px; }
  header.site nav { display: none; }
}

/* ---- hero ---- */
.hero { padding: 72px 0 32px; }
.hero h1, .hero .sub, .hero .chips { max-width: 44rem; }
.hero-en {
  font-family: var(--nvl-font-en);
  font-size: 13px; font-weight: 500; letter-spacing: .18em;
  color: var(--nvl-blue);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.hero h1 {
  font-size: clamp(30px, 5.2vw, 52px);
  font-weight: 700; letter-spacing: .04em;
  line-height: 1.32;
  background: var(--nvl-gradient);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .sub {
  margin-top: 22px; font-size: 16px; line-height: 1.9;
  color: var(--nvl-text);
  letter-spacing: .03em;
}
.trust {
  display: inline-flex; align-items: flex-start; gap: 12px;
  margin-top: 26px;
  padding: 11px 18px 11px 14px;
  border: 1px solid var(--nvl-blue);
  border-radius: var(--nvl-radius);
  background: var(--nvl-tint-blue);
  color: var(--nvl-navy);
  transition: background .18s ease;
}
.trust:hover { background: rgba(0, 126, 202, .10); }
.trust .lock { font-size: 17px; line-height: 1.35; }
.trust-copy { display: flex; flex-direction: column; line-height: 1.35; }
.trust-copy b { font-size: 13.5px; font-weight: 700; letter-spacing: .04em; }
.trust-copy small { font-size: 11.5px; letter-spacing: .05em; color: rgba(0, 72, 115, .78); margin-top: 3px; font-weight: 400; }
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.chip {
  font-size: 13px; letter-spacing: .04em; color: var(--nvl-text);
  padding: 8px 14px; border: 1px solid var(--nvl-border);
  border-radius: var(--nvl-radius-pill);
  background: #fff;
  transition: color .15s ease, border-color .15s ease;
}
.chip:hover { color: var(--nvl-blue); border-color: rgba(0, 126, 202, .5); }
@media (max-width: 767px) {
  .hero { padding: 44px 0 20px; }
  .hero .sub { font-size: 15px; }
}

/* ---- panels ---- */
section.panel { padding: 26px 0; }
section.panel + section.panel {
  border-top: 1px solid var(--nvl-border);
  padding-top: 30px;
  margin-top: 6px;
}
section.panel h2 {
  font-size: 12.5px; font-weight: 500; letter-spacing: .14em;
  color: var(--nvl-text); margin-bottom: 14px;
}

/* ---- dropzone ---- */
.dropzone {
  border: 1.5px dashed rgba(0, 126, 202, .55);
  border-radius: var(--nvl-radius);
  padding: 40px 24px 32px;
  text-align: center;
  background: var(--nvl-tint-blue);
  transition: background .18s ease, border-color .18s ease;
  cursor: pointer;
  position: relative;
  display: block;
}
.dropzone:hover, .dropzone.drag {
  background: rgba(0, 126, 202, .09);
  border-color: var(--nvl-blue);
}
.dropzone .dz-icon {
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--nvl-blue);
  margin-bottom: 14px;
}
.dropzone p.big {
  font-size: 17px; font-weight: 500;
  color: var(--nvl-navy);
  letter-spacing: .05em;
}
.dropzone p.small {
  font-size: 12.5px; color: var(--nvl-text);
  margin-top: 8px; letter-spacing: .04em;
}
.dropzone input[type=file] {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}
.dz-actions {
  margin-top: 20px;
  display: flex; gap: 12px; justify-content: center; flex-wrap: wrap;
}
.dz-actions .nvl-btn-primary,
.dz-actions .nvl-btn-secondary {
  padding: 12px 30px;
  font-size: 14px;
  transition: opacity .18s ease, background .18s ease, color .18s ease;
}
.dz-actions .nvl-btn-primary:hover { opacity: .9; }
.dz-actions .nvl-btn-secondary:hover { background: var(--nvl-tint-blue); }
.filename {
  margin-top: 14px;
  font-size: 12.5px; color: var(--nvl-text);
  letter-spacing: .03em;
}
.spinner {
  display: none;
  align-items: center; gap: 10px; justify-content: center;
  margin-top: 14px;
  font-size: 13px; color: var(--nvl-text); letter-spacing: .04em;
}
.spinner.on { display: inline-flex; }
.spinner::before {
  content: ''; display: inline-block; width: 14px; height: 14px;
  border: 2px solid var(--nvl-border); border-top-color: var(--nvl-blue);
  border-radius: 50%; animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
@media (max-width: 767px) {
  .dropzone { padding: 32px 18px 26px; }
  .dropzone p.big { font-size: 15.5px; }
  .dz-actions .nvl-btn-primary,
  .dz-actions .nvl-btn-secondary { padding: 12px 22px; font-size: 13.5px; }
}

/* ---- errors ---- */
.error {
  margin-top: 14px;
  padding: 12px 16px;
  border: 1px solid var(--nvl-orange-text);
  border-left-width: 3px;
  background: var(--nvl-tint-orange);
  color: var(--nvl-orange-text);
  border-radius: var(--nvl-radius);
  font-size: 14px;
}
.error .actions { margin-top: 10px; display: flex; gap: 10px; flex-wrap: wrap; }
.error .nvl-btn-primary,
.error .nvl-btn-secondary { padding: 10px 22px; font-size: 13.5px; }

/* ---- sheet tabs ---- */
.tabs {
  display: flex; gap: 0;
  border-bottom: 1px solid var(--nvl-border);
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
  /* 右端フェードで横スクロール可能なことを示す（狭い画面用） */
  mask-image: linear-gradient(to right, #000 calc(100% - 24px), transparent);
  -webkit-mask-image: linear-gradient(to right, #000 calc(100% - 24px), transparent);
}
.tab {
  padding: 10px 18px;
  font-size: 13px; letter-spacing: .05em;
  border: 0; background: transparent; cursor: pointer;
  color: var(--nvl-text); font-family: inherit;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color .15s ease, border-color .15s ease;
}
.tab:hover { color: var(--nvl-blue); }
.tab.active {
  color: var(--nvl-blue);
  border-bottom-color: var(--nvl-blue);
  font-weight: 500;
}

/* ---- options ---- */
/* M-07 修正: <details> ベースの折りたたみ。デスクトップは default open、
   モバイル（〜767px）は default 折りたたみ（open 属性を CSS で無効化はできないため、
   HTML 側の <details open> と組み合わせ、モバイルは JS なしで初回のみ折り畳む
   のではなく、summary クリックで開閉できることで SPEC §7.1 の要件を満たす）。 */
details.opt-details {
  border: 1px solid var(--nvl-border);
  border-radius: var(--nvl-radius);
  background: #fff;
}
details.opt-details > .options { border: 0; border-radius: 0; }
summary.opt-summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 22px;
  font-size: 14px; font-weight: 500; letter-spacing: .05em;
  color: var(--nvl-ink);
  display: flex; align-items: center; gap: 8px;
  user-select: none;
}
summary.opt-summary::-webkit-details-marker { display: none; }
summary.opt-summary::before {
  content: '';
  display: inline-block;
  width: 8px; height: 8px;
  border-right: 1.5px solid var(--nvl-blue);
  border-bottom: 1.5px solid var(--nvl-blue);
  transform: rotate(-45deg);
  transition: transform .15s ease;
  margin-right: 4px;
}
details[open].opt-details > summary.opt-summary::before { transform: rotate(45deg); }
details[open].opt-details > summary.opt-summary { border-bottom: 1px solid var(--nvl-border); }
@media (max-width: 767px) {
  /* SPEC §7.1: モバイルはオプションパネル折りたたみ既定。
     HTML の <details open> を script なしで閉じるため、
     max-height/overflow で強制的に閉じた見た目にはしない（アクセシビリティ影響）。
     代わりに、モバイルでは summary が最初にフォーカスされてスクロールしやすい配置にする。
     初回だけ折りたたむ挙動は app.js で <details> の open 属性を JS 制御する。 */
}

.options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px 22px;
  padding: 20px 22px;
  border: 1px solid var(--nvl-border);
  border-radius: var(--nvl-radius);
  background: #fff;
}
.opt {
  display: flex; align-items: center; gap: 10px;
  font-size: 14px; color: var(--nvl-ink);
  cursor: pointer;
  letter-spacing: .02em;
}
.opt input[type=checkbox] {
  width: 16px; height: 16px;
  accent-color: var(--nvl-blue);
  cursor: pointer;
}
.opt-select {
  display: flex; align-items: center; gap: 12px;
  font-size: 14px; color: var(--nvl-ink);
  letter-spacing: .02em;
}
.opt-select select {
  font-family: inherit; font-size: 14px;
  padding: 7px 10px;
  border: 1px solid var(--nvl-border);
  border-radius: var(--nvl-radius);
  background: #fff;
  color: var(--nvl-ink);
  cursor: pointer;
  transition: border-color .15s ease;
}
.opt-select select:hover { border-color: var(--nvl-blue); }
.opt-note {
  grid-column: 1 / -1;
  font-size: 12px; color: var(--nvl-text);
  padding-top: 12px; margin-top: 4px;
  border-top: 1px solid var(--nvl-border);
  display: flex; align-items: center; gap: 8px;
  letter-spacing: .04em;
}
.opt-note::before {
  content: 'i';
  display: inline-flex; align-items: center; justify-content: center;
  width: 15px; height: 15px; border-radius: 50%;
  background: var(--nvl-blue); color: #fff;
  font-family: var(--nvl-font-en);
  font-size: 10px; font-weight: 500; font-style: italic;
  flex-shrink: 0;
}
.opt-warn {
  grid-column: 1 / -1;
  padding: 10px 14px; margin-top: 6px;
  background: var(--nvl-tint-orange);
  border-left: 3px solid var(--nvl-orange);
  border-radius: var(--nvl-radius);
  font-size: 12.5px; color: var(--nvl-orange-text);
  letter-spacing: .03em;
  display: none;
}
.opt-warn.on { display: block; }

/* ---- preview area ---- */
.table-tabs {
  margin: 8px 0 4px;
  display: flex; gap: 0;
  border-bottom: 1px solid var(--nvl-border);
  overflow-x: auto;
}
.ttab {
  padding: 8px 14px;
  font-size: 13px; letter-spacing: .04em;
  border: 0; background: transparent; cursor: pointer;
  color: var(--nvl-text); font-family: inherit;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color .15s ease, border-color .15s ease;
}
.ttab:hover { color: var(--nvl-blue); }
.ttab.active {
  color: var(--nvl-blue);
  border-bottom-color: var(--nvl-blue);
  font-weight: 500;
}

.preview-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  margin-top: 8px;
}
@media (max-width: 767px) {
  .preview-cols { grid-template-columns: 1fr; gap: 24px; }
}
/* OBS-1 修正（QA W5）: grid item に min-width:0 を付けないと、
   中身の table.grid が min-content 幅で子トラックを押し広げ、
   1fr 1fr が守られず左右カラムが等幅にならない。 */
.pcol { min-width: 0; }
.pcol h3 {
  font-size: 12px;
  letter-spacing: .12em;
  font-weight: 500;
  color: var(--nvl-text);
  margin-bottom: 10px;
}
.tbl-scroll {
  max-height: 440px; overflow: auto;
  border: 1px solid var(--nvl-border);
  border-radius: var(--nvl-radius);
  background: #fff;
}
table.grid {
  border-collapse: collapse; width: 100%;
  font-size: 13px;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, "Courier New", monospace;
}
table.grid th, table.grid td {
  border: 1px solid var(--nvl-border);
  padding: 6px 10px;
  text-align: left;
  vertical-align: top;
  white-space: pre-wrap;
  word-break: break-word;
  min-width: 70px;
  max-width: 260px;
  overflow-wrap: anywhere;
}
table.grid th {
  background: var(--nvl-tint-blue);
  color: var(--nvl-navy);
  font-weight: 500;
  letter-spacing: .02em;
  position: sticky; top: 0; z-index: 1;
}
table.grid tbody tr:nth-child(2n) td { background: #FAFBFC; }
.empty-cell { color: #B5B5B5; }

/* ---- output area ---- */
.format-toggle {
  display: inline-flex;
  border: 1px solid var(--nvl-border);
  border-radius: var(--nvl-radius);
  overflow: hidden;
}
.format-toggle button {
  padding: 9px 22px;
  font-size: 13px;
  font-family: inherit;
  background: #fff;
  color: var(--nvl-ink);
  border: 0;
  cursor: pointer;
  letter-spacing: .05em;
  transition: background .15s ease, color .15s ease;
}
.format-toggle button:hover {
  background: var(--nvl-tint-blue);
  color: var(--nvl-blue);
}
.format-toggle button + button { border-left: 1px solid var(--nvl-border); }
.format-toggle button.active {
  background: var(--nvl-gradient);
  color: #fff;
  font-weight: 500;
}
/* activeボタンの右／左に来る border-left をグラデ面から剥がす */
.format-toggle button.active + button { border-left-color: transparent; }
.format-toggle button.active:hover {
  background: var(--nvl-gradient);
  color: #fff;
}
.output-text {
  margin-top: 12px;
  width: 100%;
  min-height: 200px; max-height: 480px;
  padding: 14px 16px;
  border: 1px solid var(--nvl-border);
  border-radius: var(--nvl-radius);
  background: #FAFBFC;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, "Courier New", monospace;
  font-size: 13px;
  line-height: 1.7;
  color: var(--nvl-ink);
  resize: vertical;
  letter-spacing: 0;
}
.output-text:focus { border-color: var(--nvl-blue); }

.output-actions {
  display: flex; gap: 12px;
  flex-wrap: wrap;
  margin-top: 16px;
  align-items: center;
}
.output-actions .nvl-btn-primary,
.output-actions .nvl-btn-secondary {
  padding: 12px 26px;
  font-size: 14px;
  transition: opacity .18s ease, background .18s ease, color .18s ease, border-color .18s ease;
}
.output-actions .nvl-btn-primary:hover { opacity: .9; }
.output-actions .nvl-btn-secondary {
  color: var(--nvl-text);
  border-color: var(--nvl-border);
}
.output-actions .nvl-btn-secondary:hover {
  color: var(--nvl-blue);
  border-color: var(--nvl-blue);
}

/* ---- toast ---- */
.toast {
  position: fixed;
  left: 50%; bottom: 40px;
  transform: translateX(-50%) translateY(30px);
  padding: 12px 22px;
  border-radius: var(--nvl-radius);
  background: var(--nvl-ink);
  color: #fff;
  font-size: 14px; letter-spacing: .04em;
  opacity: 0; pointer-events: none;
  transition: opacity .2s ease, transform .2s ease;
  z-index: 100;
}
.toast.on {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

/* ---- related / cta ---- */
.related {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 16px 20px;
  margin-top: 28px;
  border: 1px solid var(--nvl-border);
  border-left: 3px solid var(--nvl-blue);
  border-radius: var(--nvl-radius);
  background: var(--nvl-tint-blue);
  font-size: 14px; line-height: 1.85;
  color: var(--nvl-ink);
  letter-spacing: .02em;
}
.related-arrow {
  color: var(--nvl-blue);
  font-family: var(--nvl-font-en);
  font-weight: 500;
  font-size: 16px;
  line-height: 1.85;
  flex-shrink: 0;
}
.related a {
  color: var(--nvl-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color .15s ease;
}
.related a:hover { color: var(--nvl-navy); }

.cta-row {
  margin-top: 22px;
  padding: 16px 0 4px;
  border-top: 1px solid var(--nvl-border);
  font-size: 13.5px;
  color: var(--nvl-text);
  letter-spacing: .03em;
}
.cta-row a {
  color: var(--nvl-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color .15s ease;
}
.cta-row a:hover { color: var(--nvl-navy); }

/* ---- footer ---- */
footer.site {
  margin-top: 96px;
  background: var(--nvl-bg-dark);
  color: #fff;
  padding: 56px 0 40px;
}
footer.site .in {
  max-width: 1080px; margin: 0 auto; padding: 0 40px;
}
footer.site h4 {
  font-family: var(--nvl-font-en);
  font-weight: 500;
  font-size: 20px;
  letter-spacing: .05em;
}
footer.site .tagline {
  margin-top: 6px;
  font-size: 13px;
  letter-spacing: .06em;
  color: rgba(255, 255, 255, .68);
}
footer.site .row {
  display: flex;
  gap: 28px;
  margin-top: 26px;
  flex-wrap: wrap;
  font-size: 13px;
  letter-spacing: .05em;
}
footer.site a {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color .15s ease;
}
footer.site a:hover { color: var(--nvl-cyan); }
footer.site .disclaimer {
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, .18);
  font-size: 12px;
  color: rgba(255, 255, 255, .7);
  line-height: 1.75;
  letter-spacing: .03em;
}
@media (max-width: 767px) {
  footer.site .in { padding: 0 20px; }
  footer.site { padding: 44px 0 32px; margin-top: 64px; }
  footer.site .row { gap: 12px 20px; }
}

/* ---- utility ---- */
.hidden { display: none !important; }

/* ---- focus ring ---- */
button:focus-visible,
a:focus-visible,
input[type=file]:focus-visible + .dropzone,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--nvl-blue);
  outline-offset: 2px;
}
.dropzone:focus-visible {
  outline: 2px solid var(--nvl-blue);
  outline-offset: 2px;
}