:root {
  --bg: #14181F;
  --surface: #1B212B;
  --surface-raised: #222A36;
  --border: #2B3442;
  --border-soft: #232B38;

  --accent: #C98A3E;
  --accent-soft: rgba(201, 138, 62, 0.14);
  --accent-strong: #E0A458;

  --detect: #4FD1C5;
  --detect-soft: rgba(79, 209, 197, 0.12);

  --text: #EDEAE3;
  --text-muted: #97A0B2;
  --text-faint: #5B6274;

  --font-display: "Space Grotesk", "Inter", sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --maxw: 880px;
}

* { box-sizing: border-box; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

html { color-scheme: dark; }

body {
  margin: 0;
  background: var(--bg);
  background-image:
    radial-gradient(1100px 500px at 15% -10%, rgba(201,138,62,0.07), transparent 60%),
    radial-gradient(900px 500px at 100% 10%, rgba(79,209,197,0.05), transparent 55%);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 96px;
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

a { color: var(--accent-strong); }

:focus-visible {
  outline: 2px solid var(--detect);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---------- Header ---------- */
.site-header {
  border-bottom: 1px solid var(--border-soft);
  padding: 18px 0;
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.wordmark {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--text);
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-wrap: wrap;
  margin-left: -8px;
}
.site-nav__link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-decoration: none;
  padding: 7px 12px;
  border-radius: 6px;
  transition: color 0.15s ease, background 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.site-nav__link:hover { color: var(--text); background: var(--surface); }
.site-nav__link[aria-current="page"] {
  color: var(--accent-strong);
  background: var(--accent-soft);
}
.nav-soon {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.03em;
  color: var(--text-faint);
  border: 1px dashed var(--border);
  border-radius: 4px;
  padding: 1px 5px;
}
.wordmark__glyph { color: var(--text-muted); display: inline-flex; width: 22px; height: 22px; }
.wordmark__glyph svg { width: 100%; height: 100%; }
.site-header__trust {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  color: var(--text-faint);
}

/* ---------- Hero ---------- */
.hero { padding: 56px 0 44px; }
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-strong);
  margin: 0 0 14px;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4.4vw, 2.85rem);
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 0 0 16px;
  max-width: 15ch;
}
.hero__sub {
  color: var(--text-muted);
  max-width: 54ch;
  font-size: 1.02rem;
  margin: 0 0 34px;
}

.tool-select {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 14px;
  max-width: 820px;
}
.tool-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  text-align: left;
  color: var(--text);
  font-family: inherit;
  text-decoration: none;
  transition: border-color 0.15s ease, transform 0.15s ease, background 0.15s ease;
}
.tool-card:hover { border-color: var(--accent); transform: translateY(-1px); }
.tool-card.is-active {
  border-color: var(--accent);
  background: linear-gradient(180deg, var(--accent-soft), var(--surface) 70%);
}
.tool-card--soon { opacity: 0.72; }
.tool-card--soon:hover { border-color: var(--border); transform: none; }
.tool-card__icon { color: var(--text-muted); width: 34px; height: 34px; }
.tool-card__icon svg { width: 100%; height: 100%; }
.tool-card.is-active .tool-card__icon { color: var(--accent-strong); }
.tool-card__label { font-weight: 600; font-size: 1rem; display: flex; align-items: center; gap: 8px; }
.tool-card__hint { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-faint); }

.hero--pinned .hero__sub { margin-bottom: 18px; }
.hero__switch {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-faint);
  margin: 0 0 6px;
}
.hero__switch a { color: var(--accent-strong); text-decoration: none; }
.hero__switch a:hover { text-decoration: underline; }

/* ---------- Steps ---------- */
.step { padding: 20px 0 40px; border-top: 1px solid var(--border-soft); }
.step__header h2 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}
.step__sub { color: var(--text-muted); margin: 0 0 22px; font-size: 0.95rem; }

/* ---------- Dropzone ---------- */
.dropzone {
  position: relative;
  border: 1.5px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 4px;
  cursor: pointer;
  background: var(--surface);
  overflow: hidden;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.dropzone:hover, .dropzone.is-dragging {
  border-color: var(--detect);
  background: linear-gradient(180deg, var(--detect-soft), var(--surface) 65%);
}
.dropzone__visual {
  position: relative;
  width: 64px;
  height: 80px;
  color: var(--text-faint);
  margin-bottom: 14px;
}
.dropzone__doc { width: 100%; height: 100%; }
.dropzone__scanline {
  position: absolute;
  left: -4px; right: -4px;
  height: 2px;
  top: 0;
  background: linear-gradient(90deg, transparent, var(--detect), transparent);
  box-shadow: 0 0 10px 1px var(--detect);
  animation: scan 2.6s ease-in-out infinite;
  opacity: 0.9;
}
@keyframes scan {
  0% { top: 4px; opacity: 0; }
  15% { opacity: 0.9; }
  85% { opacity: 0.9; }
  100% { top: 74px; opacity: 0; }
}
.dropzone.has-file .dropzone__scanline { animation: none; opacity: 0; }
.dropzone.has-file .dropzone__doc { color: var(--accent-strong); }

.dropzone__title { font-weight: 600; margin: 4px 0 2px; }
.dropzone__sub { color: var(--text-muted); font-size: 0.9rem; margin: 0; }
.dropzone__filename {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--detect);
  margin: 12px 0 0;
}
.dropzone__error {
  font-size: 0.88rem;
  color: #E39191;
  margin: 12px 0 0;
  max-width: 44ch;
}

/* ---------- Fix list ---------- */
.fix-group { margin-bottom: 22px; }
.fix-group__title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin: 0 0 10px;
}
.fix-row {
  display: grid;
  grid-template-columns: 14px 18px 1fr auto;
  align-items: start;
  gap: 12px;
  padding: 13px 14px;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  margin-bottom: 8px;
  cursor: pointer;
  background: var(--surface);
  transition: border-color 0.15s ease;
}
.fix-row:hover { border-color: var(--border); }
.fix-row__status {
  width: 8px; height: 8px;
  border-radius: 50%;
  margin-top: 6px;
  background: var(--text-faint);
  opacity: 0.5;
}
.fix-row.is-detected .fix-row__status { background: var(--detect); opacity: 1; box-shadow: 0 0 6px 0 var(--detect); }
.fix-row.is-clean .fix-row__status { background: var(--text-faint); opacity: 0.4; }
.fix-row.is-soon .fix-row__status { background: transparent; border: 1.5px dashed var(--text-faint); }

.fix-row__checkbox { margin-top: 4px; accent-color: var(--accent); width: 16px; height: 16px; cursor: pointer; }
.fix-row__body { display: flex; flex-direction: column; gap: 3px; }
.fix-row__title { font-weight: 600; font-size: 0.95rem; }
.fix-row__desc { color: var(--text-muted); font-size: 0.86rem; line-height: 1.45; }
.fix-row__detail { font-family: var(--font-mono); font-size: 0.78rem; color: var(--detect); min-height: 1em; }
.fix-row.is-clean .fix-row__detail { color: var(--text-faint); }

.fix-row__tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--text-faint);
  white-space: nowrap;
  margin-top: 3px;
}
.fix-row.is-detected .fix-row__tag { color: var(--detect); }
.fix-row.is-soon { cursor: default; opacity: 0.6; }
.fix-row.is-soon .fix-row__checkbox { cursor: default; }

/* ---------- Metadata ---------- */
.metadata-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.meta-field { display: flex; flex-direction: column; gap: 6px; }
.meta-field label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.meta-field input {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.92rem;
}
.meta-field input:focus { border-color: var(--detect); outline: none; }
.meta-field:nth-child(7), .meta-field:nth-child(8) { grid-column: 1 / -1; }

/* ---------- Action bar ---------- */
.action-bar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: rgba(20, 24, 31, 0.92);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--border);
  padding: 14px 0;
  z-index: 20;
}
.action-bar__inner { display: flex; justify-content: flex-end; align-items: center; gap: 12px; }

.btn {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.92rem;
  border-radius: var(--radius-sm);
  padding: 12px 20px;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: transform 0.1s ease, opacity 0.15s ease;
}
.btn:active { transform: translateY(1px); }
.btn--ghost { background: transparent; border-color: var(--border); color: var(--text-muted); }
.btn--ghost:hover { color: var(--text); border-color: var(--text-faint); }
.btn--primary { background: var(--accent); color: #1B1206; }
.btn--primary:hover { background: var(--accent-strong); }
.btn--primary:disabled { opacity: 0.4; cursor: not-allowed; }
.btn--primary.is-working { background: var(--detect); color: #06201D; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border-soft);
  padding: 48px 0 0;
  margin-top: 10px;
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 36px;
}
.site-footer__brand .wordmark { margin-bottom: 12px; }
.site-footer__blurb {
  font-family: var(--font-body);
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 32ch;
  margin: 0;
}
.site-footer__col h4 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin: 0 0 14px;
}
.site-footer__col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.site-footer__col a {
  font-family: var(--font-body);
  font-size: 0.88rem;
  color: var(--text-muted);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.site-footer__col a:hover { color: var(--accent-strong); }

.site-footer__bottom {
  border-top: 1px solid var(--border-soft);
  padding: 18px 0 28px;
}
.site-footer__bottom p {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-faint);
  margin: 0;
}

/* ---------- Features (SEO content) ---------- */
.features {
  padding: 56px 0 60px;
  border-top: 1px solid var(--border-soft);
}
.features h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 1.9rem);
  letter-spacing: -0.01em;
  margin: 0 0 14px;
}
.features__intro {
  color: var(--text-muted);
  max-width: 66ch;
  font-size: 0.98rem;
  margin: 0 0 36px;
}
.features__columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
}
.features__columns--single { grid-template-columns: 1fr; max-width: 68ch; }
.features__col h3 {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-strong);
  margin: 0 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-soft);
}
.feature-item { margin-bottom: 22px; }
.feature-item h4 {
  font-size: 0.98rem;
  font-weight: 600;
  margin: 0 0 6px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.feature-item p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.55;
  margin: 0;
}
.feature-item--soon h4 { color: var(--text-muted); }
.feature-item--soon p { color: var(--text-faint); }
.features__teaser { color: var(--text-muted); font-size: 0.92rem; line-height: 1.6; margin: 0 0 16px; }
.features__teaser-link { font-size: 0.85rem; padding: 10px 16px; }
.soon-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.04em;
  color: var(--text-faint);
  border: 1px dashed var(--border);
  border-radius: 4px;
  padding: 2px 6px;
  white-space: nowrap;
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .tool-select { grid-template-columns: 1fr; max-width: 100%; }
  .metadata-grid { grid-template-columns: 1fr; }
  .meta-field:nth-child(7), .meta-field:nth-child(8) { grid-column: auto; }
  .hero { padding: 40px 0 32px; }
  .fix-row { grid-template-columns: 12px 18px 1fr; }
  .fix-row__tag { grid-column: 3; margin-top: 0; }
  .action-bar__inner { justify-content: space-between; }
  .btn { padding: 12px 16px; font-size: 0.88rem; }
  .features__columns { grid-template-columns: 1fr; gap: 8px; }
}

/* ---------- Blog ---------- */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-faint);
  margin: 24px 0 0;
}
.breadcrumb a { color: var(--text-muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--accent-strong); }

.blog-hero { padding: 28px 0 40px; }
.blog-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 4vw, 2.3rem);
  letter-spacing: -0.01em;
  margin: 14px 0 12px;
  max-width: 20ch;
}
.blog-hero__sub { color: var(--text-muted); max-width: 56ch; font-size: 1rem; margin: 0; }

.post-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-bottom: 60px;
}
.post-card {
  display: block;
  padding: 20px;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text);
  margin-bottom: 12px;
  transition: border-color 0.15s ease;
}
.post-card:hover { border-color: var(--accent); }
.post-card__tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-strong);
}
.post-card h2 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin: 8px 0 6px;
  letter-spacing: -0.005em;
}
.post-card p { color: var(--text-muted); font-size: 0.92rem; margin: 0; }

.article { padding: 20px 0 20px; max-width: 68ch; }
.article__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-strong);
  margin: 20px 0 12px;
}
.article h1 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.15rem);
  letter-spacing: -0.01em;
  margin: 0 0 14px;
}
.article__meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-faint);
  margin: 0 0 32px;
}
.article h2 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin: 34px 0 12px;
  letter-spacing: -0.005em;
}
.article p { color: var(--text-muted); font-size: 0.98rem; line-height: 1.7; margin: 0 0 16px; }
.article ol, .article ul { color: var(--text-muted); font-size: 0.98rem; line-height: 1.7; padding-left: 22px; margin: 0 0 16px; }
.article li { margin-bottom: 6px; }
.article strong { color: var(--text); }
.article code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: 4px;
  padding: 1px 6px;
}

.article-cta {
  margin: 36px 0 40px;
  padding: 22px;
  border: 1px solid var(--accent);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--accent-soft), var(--surface) 75%);
}
.article-cta h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin: 0 0 8px;
}
.article-cta p { margin: 0 0 16px; color: var(--text-muted); font-size: 0.92rem; }
.article-cta .btn { display: inline-block; text-decoration: none; }

@media (max-width: 640px) {
  .site-header__trust { display: none; }
  .site-nav { margin-left: 0; gap: 0; }
  .site-nav__link { padding: 6px 9px; font-size: 0.76rem; }
  .site-footer__grid { grid-template-columns: 1fr; gap: 28px; }
  .site-footer__blurb { max-width: 100%; }
}

/* ---------- Template / formula builders (word-features.html, excel-features.html) ---------- */
.template-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 22px;
}
.template-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  text-align: left;
  color: var(--text);
  font-family: inherit;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.template-card:hover { border-color: var(--accent); }
.template-card.is-active {
  border-color: var(--accent);
  background: linear-gradient(180deg, var(--accent-soft), var(--surface) 70%);
}
.template-card__name { font-weight: 600; font-size: 0.98rem; }
.template-card__desc { color: var(--text-muted); font-size: 0.85rem; line-height: 1.5; }

.builder-form {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 22px;
  margin-top: 4px;
}
.builder-form .metadata-grid { margin-bottom: 18px; }
.builder-status {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--detect);
  margin: 10px 0 0;
  min-height: 1.2em;
}

.formula-builder {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 22px;
  margin-top: 18px;
}
.formula-builder .metadata-grid { margin-bottom: 6px; }
.formula-hint {
  font-family: var(--font-body);
  font-size: 0.86rem;
  color: var(--text-muted);
  margin: 10px 0 18px;
}
.formula-hint code {
  font-family: var(--font-mono);
  color: var(--detect);
  background: var(--surface-raised);
  border: 1px solid var(--border-soft);
  border-radius: 4px;
  padding: 1px 6px;
}

@media (max-width: 640px) {
  .template-grid { grid-template-columns: 1fr; }
}