/* ==========================================================
   Ledgerly Design System  |  ledgerly.tools
   ========================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap');

/* ── Design Tokens ───────────────────────────────────────── */
:root {
  /* Brand */
  --brand:         oklch(0.50 0.19 252);
  --brand-dark:    oklch(0.38 0.19 252);
  --brand-light:   oklch(0.64 0.15 252);
  --brand-muted:   oklch(0.95 0.045 252);
  --brand-glow:    oklch(0.50 0.19 252 / 0.13);

  /* Surface */
  --surface:       oklch(0.984 0.004 90);
  --surface-alt:   oklch(0.975 0.005 90);
  --card:          #ffffff;

  /* Border */
  --border:        oklch(0.89 0.005 250);
  --border-strong: oklch(0.80 0.01 250);

  /* Text */
  --text-1:        oklch(0.15 0.015 252);
  --text-2:        oklch(0.46 0.01 252);
  --text-3:        oklch(0.62 0.005 252);

  /* Feedback */
  --green:         oklch(0.55 0.17 145);
  --green-muted:   oklch(0.95 0.05 145);
  --amber:         oklch(0.72 0.17 65);

  /* Elevation */
  --shadow-xs: 0 1px 2px oklch(0 0 0 / 0.05);
  --shadow-sm: 0 1px 4px oklch(0 0 0 / 0.07), 0 2px 6px oklch(0 0 0 / 0.04);
  --shadow-md: 0 4px 16px oklch(0 0 0 / 0.08), 0 2px 6px oklch(0 0 0 / 0.04);
  --shadow-lg: 0 8px 28px oklch(0 0 0 / 0.10), 0 4px 10px oklch(0 0 0 / 0.05);
  --shadow-xl: 0 16px 48px oklch(0 0 0 / 0.12), 0 6px 16px oklch(0 0 0 / 0.06);

  /* Radii */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 22px;
  --r-full: 9999px;

  /* Layout */
  --nav-h:        60px;
  --max-w:        1120px;
  --sidebar-w:    300px;
  --content-w:    640px;

  /* Transitions */
  --t-fast:  0.12s ease;
  --t-base:  0.2s ease;
  --t-slow:  0.3s ease;
}

/* ── Reset ───────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-1);
  background: var(--surface);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--brand-dark); }
button { font-family: inherit; cursor: pointer; }

/* ── Site Header ─────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-xs);
}
.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  gap: 24px;
}

/* ── Logo ────────────────────────────────────────────────── */
.logo {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.035em;
  color: var(--text-1);
  white-space: nowrap;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 1px;
}
.logo:hover { color: var(--text-1); }
.logo-dot { color: var(--brand); }

/* ── Tool Nav ────────────────────────────────────────────── */
.tool-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  overflow-x: auto;
  overflow-y: visible;
  scrollbar-width: none;
  -ms-overflow-style: none;
  flex: 1;
  padding: 4px 0;
}
.tool-nav::-webkit-scrollbar { display: none; }

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 13px;
  border-radius: var(--r-full);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-2);
  white-space: nowrap;
  transition: color var(--t-fast), background var(--t-fast);
  border: 1px solid transparent;
}
.nav-link:hover {
  color: var(--text-1);
  background: var(--surface);
  border-color: var(--border);
}
.nav-link.active {
  color: var(--brand);
  background: var(--brand-muted);
  border-color: oklch(0.84 0.07 252);
  font-weight: 600;
}
.nav-link .nav-icon { font-size: 14px; line-height: 1; }

/* ── Ad Slots ────────────────────────────────────────────── */
.ad-wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 16px 32px 0;
}
.ad-slot {
  background: repeating-linear-gradient(
    -45deg,
    oklch(0.935 0 0),
    oklch(0.935 0 0) 6px,
    oklch(0.915 0 0) 6px,
    oklch(0.915 0 0) 12px
  );
  border: 1px dashed oklch(0.78 0 0);
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-3);
}
.ad-728x90   { height: 90px; max-width: 728px; }
.ad-336x280  { height: 280px; max-width: 336px; }
.ad-300x250  { height: 250px; }
.ad-300x600  { height: 600px; }
.ad-in-content {
  margin: 28px 0;
  max-width: 540px;
}

/* ── Page Layout ─────────────────────────────────────────── */
.page-wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 36px 32px 96px;
  display: grid;
  grid-template-columns: 1fr var(--sidebar-w);
  gap: 44px;
  align-items: start;
}
.tool-main { min-width: 0; }
.tool-sidebar {
  position: sticky;
  top: calc(var(--nav-h) + 20px);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* ── Tool Page Header ────────────────────────────────────── */
.tool-header { margin-bottom: 32px; }
.tool-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--brand);
  background: var(--brand-muted);
  padding: 3px 10px;
  border-radius: var(--r-full);
  margin-bottom: 12px;
}
.tool-header h1 {
  font-size: clamp(22px, 3.5vw, 30px);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
  color: var(--text-1);
  margin-bottom: 10px;
}
.tool-intro {
  font-size: 15px;
  color: var(--text-2);
  max-width: 560px;
  line-height: 1.65;
}

/* ── Input Grid ──────────────────────────────────────────── */
.input-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  max-width: 540px;
  margin-bottom: 24px;
}
.field {
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.field.span-2 { grid-column: span 2; }

.field label {
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-2);
}
.field input,
.field select {
  padding: 10px 13px;
  border: 1.5px solid var(--border);
  border-radius: var(--r-sm);
  font-family: inherit;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-1);
  background: var(--card);
  width: 100%;
  transition: border-color var(--t-fast), box-shadow var(--t-fast), background var(--t-fast);
  -webkit-appearance: none;
  appearance: none;
}
.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px var(--brand-glow);
  background: var(--card);
}
.field input:hover:not(:focus),
.field select:hover:not(:focus) {
  border-color: var(--border-strong);
}
.field input[type="number"]::-webkit-inner-spin-button {
  opacity: 0.4;
  margin-left: 4px;
}
.field-hint {
  font-size: 11.5px;
  color: var(--text-3);
  margin-top: -3px;
}

/* ── Result Card ─────────────────────────────────────────── */
.result-card {
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: var(--r-lg);
  padding: 28px 32px;
  max-width: 540px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 4px;
  position: relative;
  overflow: hidden;
}
.result-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand) 0%, var(--brand-light) 100%);
}
.result-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-3);
  margin-bottom: 8px;
}
.result-primary {
  font-size: 44px;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--brand);
  line-height: 1.05;
  margin-bottom: 24px;
}
.result-stats {
  display: flex;
  gap: 0;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}
.result-stat {
  flex: 1;
  padding-right: 24px;
}
.result-stat + .result-stat {
  padding-left: 24px;
  padding-right: 0;
  border-left: 1px solid var(--border);
}
.result-stat-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-3);
  margin-bottom: 4px;
}
.result-stat-value {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-1);
}

/* ── Alert / Info block inside result ────────────────────── */
.result-alert {
  margin-top: 16px;
  padding: 12px 14px;
  border-radius: var(--r-sm);
  background: var(--brand-muted);
  border: 1px solid oklch(0.87 0.06 252);
  font-size: 13px;
  color: var(--brand-dark);
  line-height: 1.5;
}

/* ── Disclaimer ──────────────────────────────────────────── */
.disclaimer {
  font-size: 12px;
  color: var(--text-3);
  max-width: 540px;
  line-height: 1.6;
  margin: 20px 0 44px;
  padding: 12px 14px;
  background: var(--surface-alt);
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
}

/* ── Explainer Section ───────────────────────────────────── */
.explainer {
  max-width: var(--content-w);
  padding-top: 36px;
  border-top: 1px solid var(--border);
  margin-bottom: 44px;
}
.explainer h2 {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--text-1);
  margin: 32px 0 10px;
}
.explainer h2:first-child { margin-top: 0; }
.explainer p {
  font-size: 14.5px;
  color: var(--text-2);
  line-height: 1.75;
  margin-bottom: 12px;
}
.explainer ul {
  padding-left: 20px;
  margin-bottom: 12px;
}
.explainer li {
  font-size: 14.5px;
  color: var(--text-2);
  line-height: 1.7;
  margin-bottom: 5px;
}
.explainer strong { color: var(--text-1); font-weight: 600; }

/* ── FAQ ─────────────────────────────────────────────────── */
.faq-list { margin-top: 16px; }
.faq-item {
  border-top: 1px solid var(--border);
  padding: 18px 0;
}
.faq-item:last-child { border-bottom: 1px solid var(--border); }
.faq-q {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 7px;
  line-height: 1.4;
}
.faq-a {
  font-size: 13.5px;
  color: var(--text-2);
  line-height: 1.7;
}

/* ── Related Tools ───────────────────────────────────────── */
.related-tools {
  padding-top: 36px;
  border-top: 1px solid var(--border);
  max-width: var(--content-w);
}
.related-tools-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-3);
  margin-bottom: 16px;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.related-card {
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: var(--r-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  color: var(--text-1);
  text-decoration: none;
  transition: border-color var(--t-base), box-shadow var(--t-base), transform var(--t-base);
}
.related-card:hover {
  border-color: var(--brand-light);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  color: var(--text-1);
}
.related-icon { font-size: 22px; margin-bottom: 4px; }
.related-name {
  font-size: 13px;
  font-weight: 600;
  line-height: 1.3;
}
.related-desc {
  font-size: 12px;
  color: var(--text-3);
  line-height: 1.4;
}

/* ── Site Footer ─────────────────────────────────────────── */
.site-footer {
  background: oklch(0.12 0.02 252);
  color: oklch(0.65 0.01 252);
  padding: 56px 32px 36px;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 56px;
  padding-bottom: 36px;
  border-bottom: 1px solid oklch(0.22 0.01 252);
  margin-bottom: 28px;
}
.footer-brand {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: #fff;
  margin-bottom: 10px;
}
.footer-tagline {
  font-size: 13px;
  line-height: 1.65;
  color: oklch(0.50 0.005 252);
}
.footer-links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 6px 24px;
  align-content: start;
}
.footer-links-heading {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: oklch(0.40 0.01 252);
  margin-bottom: 8px;
  grid-column: 1 / -1;
}
.footer-link {
  font-size: 13px;
  color: oklch(0.58 0.01 252);
  text-decoration: none;
  padding: 3px 0;
  transition: color var(--t-fast);
  display: flex;
  align-items: center;
  gap: 6px;
}
.footer-link:hover { color: #fff; }
.footer-link .f-icon { font-size: 14px; opacity: 0.7; }
.footer-bottom {
  font-size: 12px;
  color: oklch(0.40 0.005 252);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom a {
  color: oklch(0.50 0.01 252);
  text-decoration: none;
}
.footer-bottom a:hover { color: #fff; }

/* ══════════════════════════════════════════════════════════
   Homepage-specific
   ══════════════════════════════════════════════════════════ */

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 72px 32px 52px;
  text-align: center;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--brand);
  background: var(--brand-muted);
  border: 1px solid oklch(0.87 0.06 252);
  padding: 4px 14px;
  border-radius: var(--r-full);
  margin-bottom: 22px;
}
.hero-eyebrow-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--green);
}
.hero-title {
  font-size: clamp(32px, 5.5vw, 56px);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.12;
  color: var(--text-1);
  margin-bottom: 18px;
}
.hero-title .highlight {
  background: linear-gradient(135deg, var(--brand) 0%, oklch(0.60 0.22 285) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: clamp(16px, 2vw, 19px);
  color: var(--text-2);
  max-width: 500px;
  margin: 0 auto 36px;
  line-height: 1.6;
}
.hero-badges {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}
.hero-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-2);
  font-weight: 500;
}
.hero-badge-icon { font-size: 15px; }

/* ── Hub Ad ───────────────────────────────────────────────── */
.hub-ad-wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px 32px;
}

/* ── Hub Layout (homepage — tools + sticky ad sidebar) ──────── */
.hub-layout {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px 96px;
  display: grid;
  grid-template-columns: 1fr var(--sidebar-w);
  gap: 44px;
  align-items: start;
}
.hub-layout .tools-section {
  max-width: none;
  margin: 0;
  padding: 0;
}
.hub-sidebar {
  position: sticky;
  top: calc(var(--nav-h) + 20px);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* ── Tools Grid (Homepage) ───────────────────────────────── */
.tools-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px 96px;
}
.tools-section-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-3);
  margin-bottom: 20px;
}
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 20px;
}
.tool-card {
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: var(--r-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: var(--shadow-xs);
  text-decoration: none;
  color: inherit;
  transition: transform var(--t-base), box-shadow var(--t-base), border-color var(--t-base);
  position: relative;
  overflow: hidden;
}
.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: oklch(0.80 0.10 252);
  color: inherit;
}
.tool-card-badge {
  position: absolute;
  top: 16px; right: 16px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--green-muted);
  color: var(--green);
  border: 1px solid oklch(0.87 0.07 145);
  padding: 2px 8px;
  border-radius: var(--r-full);
}
.tool-card-badge.soon {
  background: oklch(0.96 0.03 65);
  color: var(--amber);
  border-color: oklch(0.88 0.06 65);
}
.tool-card-icon {
  width: 48px; height: 48px;
  border-radius: 14px;
  background: var(--brand-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
  margin-bottom: 2px;
}
.tool-card-title {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--text-1);
  letter-spacing: -0.01em;
  line-height: 1.3;
}
.tool-card-keyword {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-3);
}
.tool-card-desc {
  font-size: 13.5px;
  color: var(--text-2);
  line-height: 1.55;
  flex: 1;
}
.tool-card-cta {
  font-size: 13px;
  font-weight: 600;
  color: var(--brand);
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 6px;
  transition: gap var(--t-fast);
}
.tool-card:hover .tool-card-cta { gap: 8px; }

/* ═══════════════════════════════════════════════════════════
   Responsive
   ═══════════════════════════════════════════════════════════ */
@media (max-width: 900px) {
  :root { --sidebar-w: 0px; }

  .header-inner { padding: 0 20px; gap: 16px; }
  .ad-wrap { padding: 12px 20px 0; }

  .page-wrap {
    grid-template-columns: 1fr;
    padding: 24px 20px 72px;
    gap: 0;
  }
  .tool-sidebar { display: none; }

  .hero { padding: 48px 20px 36px; }
  .hub-ad-wrap { padding: 0 20px 24px; }
  .hub-layout { grid-template-columns: 1fr; padding: 0 20px 72px; gap: 0; }
  .hub-layout .tools-section { padding: 0; }
  .hub-sidebar { display: none; }

  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .site-footer { padding: 44px 20px 28px; }
}

@media (max-width: 600px) {
  .input-grid { grid-template-columns: 1fr; max-width: 100%; }
  .field.span-2 { grid-column: span 1; }

  .ad-728x90 { display: none; }
  .ad-336x280 { max-width: 100%; height: 200px; }

  .result-primary { font-size: 36px; }
  .result-stats { flex-direction: column; gap: 16px; }
  .result-stat + .result-stat { border-left: none; border-top: 1px solid var(--border); padding-left: 0; padding-top: 16px; }
  .result-card { padding: 22px 20px; }

  .related-grid { grid-template-columns: 1fr; }

  .hero-title { font-size: 30px; }
  .hero-sub { font-size: 15px; }
  .tools-grid { grid-template-columns: 1fr; }
  .footer-links-grid { grid-template-columns: 1fr 1fr; }
}

/* ── E-E-A-T Methodology Note ───────────────────────────── */
.tool-methodology-note {
  font-size: 12.5px;
  color: var(--text-3);
  line-height: 1.6;
  margin: 28px 0 4px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}
.tool-methodology-note a {
  color: var(--text-3);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.tool-methodology-note a:hover { color: var(--brand); }