/* ==========================================================================
   KeepAccounts — marketing site
   Design: "ledger" system — ink/paper neutrals, ledger-green primary accent,
   brass secondary accent. Fraunces (display) + Public Sans (body) + IBM Plex
   Mono (figures). Token-driven, theme-aware (system + explicit toggle).
   ========================================================================== */

/* ---------- tokens: light (default) ---------- */
:root {
  --ink: #0E2A26;
  --ink-soft: #3F5C56;
  --ink-faint: #6E8781;
  --paper: #F3F6F3;
  --surface: #FFFFFF;
  --surface-sunk: #EBF0EC;
  --rule: #D7E1DB;
  --ledger: #166F4F;
  --ledger-deep: #0E4D37;
  --ledger-tint: #E4F1E9;
  --on-ledger: #FFFFFF;
  --brass: #B07026;
  --brass-tint: #F6E9D4;
  --danger: #A6412B;
  --shadow: rgba(14, 42, 38, 0.10);

  --font-display: 'Fraunces', ui-serif, Georgia, serif;
  --font-body: 'Public Sans', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;

  --maxw: 1180px;
  --radius: 14px;
  --radius-sm: 8px;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #EAF0EC;
    --ink-soft: #AEC3BB;
    --ink-faint: #7C938A;
    --paper: #0A1917;
    --surface: #10241F;
    --surface-sunk: #0C1D19;
    --rule: #1E3832;
    --ledger: #3DBE8C;
    --ledger-deep: #58D1A2;
    --ledger-tint: #15332A;
    --on-ledger: #06120F;
    --brass: #E4AA5B;
    --brass-tint: #2B2113;
    --danger: #E2846D;
    --shadow: rgba(0, 0, 0, 0.35);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --ink: #EAF0EC;
  --ink-soft: #AEC3BB;
  --ink-faint: #7C938A;
  --paper: #0A1917;
  --surface: #10241F;
  --surface-sunk: #0C1D19;
  --rule: #1E3832;
  --ledger: #3DBE8C;
  --ledger-deep: #58D1A2;
  --ledger-tint: #15332A;
  --on-ledger: #06120F;
  --brass: #E4AA5B;
  --brass-tint: #2B2113;
  --danger: #E2846D;
  --shadow: rgba(0, 0, 0, 0.35);
  color-scheme: dark;
}

/* ---------- reset ---------- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--font-display); font-weight: 600; margin: 0; text-wrap: balance; color: var(--ink); }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
:focus-visible { outline: 2px solid var(--ledger); outline-offset: 2px; }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 200;
  background: var(--ledger); color: var(--on-ledger); padding: 10px 16px; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ---------- layout helpers ---------- */
.section-inner, .nav-inner, .footer-inner { max-width: var(--maxw); margin: 0 auto; padding-inline: 20px; }
@media (min-width: 640px) { .section-inner, .nav-inner, .footer-inner { padding-inline: 32px; } }

.section { padding-block: 84px; }
.section-flip .section-inner { }
.eyebrow {
  font-family: var(--font-mono); font-size: 12.5px; letter-spacing: 0.09em; text-transform: uppercase;
  color: var(--ledger); margin: 0 0 14px;
}
.section-title { font-size: clamp(1.7rem, 1.2rem + 1.8vw, 2.5rem); line-height: 1.15; max-width: 18ch; }
.section-sub { margin-top: 16px; max-width: 56ch; color: var(--ink-soft); font-size: 1.04rem; }

/* ---------- reveal-on-scroll ---------- */
.reveal { opacity: 1; transform: none; }
@media (prefers-reduced-motion: no-preference) {
  .reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
  .reveal.in-view { opacity: 1; transform: none; }
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 22px; border-radius: 999px; font-weight: 600; font-size: 0.97rem;
  text-decoration: none; transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
  white-space: nowrap;
}
.btn-primary { background: var(--ledger); color: var(--on-ledger); }
.btn-primary:hover { background: var(--ledger-deep); transform: translateY(-1px); }
.btn-ghost { border: 1.5px solid var(--rule); color: var(--ink); }
.btn-ghost:hover { border-color: var(--ledger); color: var(--ledger); }
.btn-small { padding: 9px 16px; font-size: 0.86rem; }
.btn-large { padding: 16px 30px; font-size: 1.04rem; }

/* ---------- nav ---------- */
.site-nav {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px) saturate(1.1);
  border-bottom: 1px solid var(--rule);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 68px; }
.brand { display: flex; align-items: center; gap: 9px; text-decoration: none; color: var(--ink); }
.brand-mark { color: var(--ledger); display: inline-flex; }
.brand-word { font-family: var(--font-display); font-weight: 600; font-size: 1.2rem; letter-spacing: -0.01em; }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { text-decoration: none; color: var(--ink-soft); font-weight: 500; font-size: 0.95rem; transition: color 0.15s ease; }
.nav-links a:hover, .nav-links a.active { color: var(--ledger); }
.nav-actions { display: flex; align-items: center; gap: 10px; }

.theme-toggle {
  width: 36px; height: 36px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center;
  color: var(--ink-soft); border: 1px solid var(--rule); flex-shrink: 0;
}
.theme-toggle:hover { color: var(--ledger); border-color: var(--ledger); }
.theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-sun { display: none; }
  :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: block; }
}

.nav-burger { display: none; width: 36px; height: 36px; flex-direction: column; justify-content: center; gap: 5px; }
.nav-burger span { display: block; width: 20px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform 0.2s ease, opacity 0.2s ease; }
.nav-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 860px) {
  .nav-links {
    position: absolute; top: 68px; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0;
    background: var(--surface); border-bottom: 1px solid var(--rule);
    max-height: 0; overflow: hidden; transition: max-height 0.25s ease;
  }
  .nav-links.open { max-height: 320px; }
  .nav-links a { padding: 14px 24px; border-bottom: 1px solid var(--rule); }
  .nav-burger { display: inline-flex; }
  .btn-small { display: none; }
}

/* ---------- hero ---------- */
.hero { padding-block: 64px 0; }
.hero-inner { max-width: var(--maxw); margin: 0 auto; padding-inline: 20px; display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: center; }
@media (min-width: 640px) { .hero-inner { padding-inline: 32px; } }
@media (max-width: 920px) { .hero-inner { grid-template-columns: 1fr; gap: 40px; } }

.hero-copy h1 { font-size: clamp(2.3rem, 1.6rem + 3vw, 3.5rem); line-height: 1.08; letter-spacing: -0.01em; }
.hero-sub { margin-top: 20px; font-size: 1.12rem; color: var(--ink-soft); max-width: 52ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }

/* journal-entry card */
.hero-visual { display: flex; justify-content: center; }
.je-card {
  width: 100%; max-width: 400px; background: var(--surface); border: 1px solid var(--rule);
  border-radius: var(--radius); padding: 22px 22px 18px; box-shadow: 0 20px 44px -18px var(--shadow);
}
.je-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 14px; }
.je-title { font-weight: 600; font-size: 0.95rem; }
.je-id { font-family: var(--font-mono); font-size: 0.78rem; color: var(--ink-faint); }
.je-table { width: 100%; border-collapse: collapse; font-size: 0.89rem; }
.je-table td { padding: 7px 0; border-top: 1px dashed var(--rule); }
.je-table tr:first-child td { border-top: none; }
.je-acct { color: var(--ink); }
.je-tag { font-family: var(--font-mono); font-size: 0.75rem; width: 28px; text-align: center; border-radius: 4px; padding: 1px 0; }
.je-dr { color: var(--ledger-deep); }
.je-cr { color: var(--brass); }
.je-amt { font-family: var(--font-mono); text-align: right; font-variant-numeric: tabular-nums; }
.je-foot { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--rule); display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.je-narration { font-size: 0.8rem; color: var(--ink-faint); }
.je-balanced { display: inline-flex; align-items: center; gap: 5px; font-size: 0.78rem; font-weight: 600; color: var(--ledger); white-space: nowrap; }

/* capability band */
.capability-band {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 1px;
  background: var(--rule); border: 1px solid var(--rule); border-radius: var(--radius);
  max-width: var(--maxw); margin: 56px auto 0; overflow: hidden;
}
.capability-band li { background: var(--surface); padding: 20px 16px; text-align: center; }
.cap-num { display: block; font-family: var(--font-mono); font-weight: 600; font-size: 1.2rem; color: var(--ledger); }
.cap-label { display: block; margin-top: 4px; font-size: 0.78rem; color: var(--ink-soft); }
@media (max-width: 760px) { .capability-band { grid-template-columns: repeat(2, 1fr); margin-inline: 20px; width: auto; } }

/* ---------- section backgrounds ---------- */
.section-flip { background: var(--surface-sunk); }

/* ---------- module cards ---------- */
.module-grid { margin-top: 44px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 920px) { .module-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .module-grid { grid-template-columns: 1fr; } }

.module-card {
  background: var(--surface); border: 1px solid var(--rule); border-radius: var(--radius);
  padding: 26px 24px; transition: border-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}
.module-card:hover { border-color: var(--ledger); transform: translateY(-3px); box-shadow: 0 16px 30px -18px var(--shadow); }
.module-icon {
  width: 42px; height: 42px; border-radius: 10px; background: var(--ledger-tint); color: var(--ledger-deep);
  display: inline-flex; align-items: center; justify-content: center; margin-bottom: 16px;
}
.module-card h3 { font-size: 1.12rem; margin-bottom: 8px; }
.module-card > p { color: var(--ink-soft); font-size: 0.93rem; margin-bottom: 16px; }
.module-card ul { display: flex; flex-direction: column; gap: 7px; }
.module-card ul li {
  font-size: 0.87rem; color: var(--ink-soft); padding-left: 16px; position: relative;
}
.module-card ul li::before {
  content: ""; position: absolute; left: 0; top: 0.6em; width: 6px; height: 1.5px; background: var(--brass);
}

/* ---------- check list (compliance / pos / mobile) ---------- */
.check-list { margin-top: 24px; display: flex; flex-direction: column; gap: 14px; }
.check-list li { display: flex; align-items: flex-start; gap: 12px; font-size: 0.97rem; color: var(--ink); }
.check-ico {
  flex-shrink: 0; width: 22px; height: 22px; border-radius: 50%; background: var(--ledger-tint); color: var(--ledger-deep);
  display: inline-flex; align-items: center; justify-content: center; margin-top: 1px;
}

/* ---------- compliance seal ---------- */
.compliance-grid, .pos-grid, .mobile-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
@media (max-width: 860px) { .compliance-grid, .pos-grid, .mobile-grid { grid-template-columns: 1fr; } }
.pos-grid .receipt-wrap { order: 2; }
@media (min-width: 861px) { .pos-grid .receipt-wrap { order: -1; } }

.seal-wrap { display: flex; justify-content: center; }
.seal {
  position: relative; width: 220px; height: 220px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center; color: var(--ledger);
  background: radial-gradient(circle at 50% 42%, var(--ledger-tint), transparent 70%);
}
.seal svg { position: absolute; inset: 0; }
.seal-text { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.seal-top { font-family: var(--font-mono); font-weight: 600; font-size: 1.5rem; letter-spacing: 0.04em; color: var(--ledger-deep); }
.seal-bottom { font-size: 0.85rem; color: var(--ink-soft); }

/* ---------- reports ---------- */
.report-grid { margin-top: 44px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--rule); border: 1px solid var(--rule); border-radius: var(--radius); overflow: hidden; }
@media (max-width: 860px) { .report-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 500px) { .report-grid { grid-template-columns: 1fr; } }
.report-group { background: var(--surface); padding: 24px 22px; }
.report-group h3 { font-size: 0.95rem; font-weight: 600; margin-bottom: 14px; color: var(--ledger-deep); }
.report-group ul { display: flex; flex-direction: column; gap: 9px; }
.report-group li { font-size: 0.88rem; color: var(--ink-soft); padding-bottom: 9px; border-bottom: 1px dashed var(--rule); }
.report-group li:last-child { border-bottom: none; padding-bottom: 0; }

/* ---------- receipt mockup ---------- */
.receipt-wrap { display: flex; justify-content: center; }
.receipt {
  width: 100%; max-width: 270px; background: var(--surface); border: 1px solid var(--rule);
  border-radius: 4px; padding: 20px 18px; font-family: var(--font-mono); font-size: 0.78rem;
  box-shadow: 0 20px 44px -20px var(--shadow);
  background-image: repeating-linear-gradient(to bottom, transparent, transparent 27px, var(--surface-sunk) 27px, var(--surface-sunk) 28px);
}
.receipt-brand { font-weight: 600; text-align: center; font-size: 0.82rem; letter-spacing: 0.02em; }
.receipt-sub { text-align: center; color: var(--ink-faint); margin-top: 2px; font-size: 0.7rem; }
.receipt-rule { border-top: 1px dashed var(--rule); margin: 9px 0; }
.receipt-row { display: flex; justify-content: space-between; gap: 10px; padding: 2px 0; font-variant-numeric: tabular-nums; }
.receipt-total { font-weight: 600; }
.receipt-qr { display: flex; flex-direction: column; align-items: center; gap: 6px; margin-top: 10px; color: var(--ink); }
.receipt-qr span { font-size: 0.64rem; color: var(--ink-faint); }

/* ---------- phone mockup ---------- */
.phone-wrap { display: flex; justify-content: center; }
.phone {
  width: 240px; border-radius: 34px; background: var(--ink); padding: 12px;
  box-shadow: 0 24px 50px -20px var(--shadow);
}
.phone-notch { width: 60px; height: 6px; border-radius: 4px; background: var(--ink-faint); margin: 0 auto 8px; opacity: 0.5; }
.phone-screen { background: var(--surface); border-radius: 22px; padding: 16px 14px; }
.phone-bar { display: flex; align-items: center; justify-content: space-between; font-weight: 600; font-size: 0.92rem; margin-bottom: 14px; }
.phone-badge { font-size: 0.65rem; font-family: var(--font-mono); background: var(--brass-tint); color: var(--brass); padding: 3px 8px; border-radius: 999px; }
.phone-field { margin-bottom: 12px; }
.phone-label { display: block; font-size: 0.68rem; color: var(--ink-faint); text-transform: uppercase; letter-spacing: 0.06em; }
.phone-value { display: block; font-size: 0.88rem; font-weight: 500; margin-top: 2px; }
.phone-line { display: flex; justify-content: space-between; font-size: 0.78rem; padding: 6px 0; border-top: 1px dashed var(--rule); color: var(--ink-soft); font-variant-numeric: tabular-nums; }
.phone-total { display: flex; justify-content: space-between; font-weight: 600; font-size: 0.85rem; padding: 9px 0 0; margin-top: 4px; border-top: 1px solid var(--rule); font-variant-numeric: tabular-nums; }
.phone-cta { margin-top: 14px; background: var(--ledger); color: var(--on-ledger); text-align: center; padding: 10px; border-radius: 10px; font-size: 0.82rem; font-weight: 600; }
.phone-sync { text-align: center; margin-top: 8px; font-size: 0.68rem; color: var(--ink-faint); }

/* ---------- CTA band ---------- */
.cta-band { background: var(--ledger-deep); color: var(--on-ledger); padding-block: 76px; }
:root[data-theme="dark"] .cta-band { background: var(--ledger-tint); color: var(--ink); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .cta-band { background: var(--ledger-tint); color: var(--ink); } }
.cta-inner { text-align: center; display: flex; flex-direction: column; align-items: center; gap: 16px; }
.cta-inner h2 { font-size: clamp(1.5rem, 1.1rem + 1.6vw, 2.1rem); max-width: 22ch; color: inherit; }
.cta-inner p { opacity: 0.85; max-width: 44ch; }
.cta-inner .btn-primary { background: var(--on-ledger); color: var(--ledger-deep); margin-top: 8px; }
.cta-inner .btn-primary:hover { background: var(--brass-tint); }
:root[data-theme="dark"] .cta-inner .btn-primary, :root:not([data-theme="light"]) .cta-inner .btn-primary { background: var(--ledger); color: var(--on-ledger); }

/* ---------- footer ---------- */
.site-footer { padding-block: 48px 28px; border-top: 1px solid var(--rule); }
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px; }
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand .brand-mark { color: var(--ledger); }
.footer-word { font-family: var(--font-display); font-weight: 600; font-size: 1.05rem; }
.footer-tag { font-size: 0.82rem; color: var(--ink-faint); margin-top: 2px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 20px; }
.footer-links a { font-size: 0.88rem; color: var(--ink-soft); text-decoration: none; }
.footer-links a:hover { color: var(--ledger); }
.footer-copy { text-align: center; margin-top: 32px; font-size: 0.78rem; color: var(--ink-faint); }