/* =========================================================
   Fonts (self-hosted — files go in /fonts/)
   ========================================================= */
@font-face {
  font-family: "Fraunces";
  src: url("/fonts/fraunces-500.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Fraunces";
  src: url("/fonts/fraunces-600.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

/* =========================================================
   Chiffre en Lettre — Design tokens
   ========================================================= */
:root {
  --bg: #f7f9f9;
  --surface: #ffffff;
  --ink: #1c2b2b;
  --ink-soft: #3d4f4f;
  --ink-faint: #5c6f6f;
  --accent: #0e5a5a;
  --accent-dark: #0a4444;
  --accent-soft: #a8752c;
  --accent-soft-text: #7a5620;
  --border: #dde3e1;
  --border-strong: #c3ccc9;
  --focus: #1c2b2b;
  --success-bg: #eef4ee;
  --success-border: #a9c9ab;
  --error: #8b2635;
  --error-bg: #fbeeee;
  --radius: 10px;
  --radius-sm: 6px;
  --font-display: "Fraunces", ui-serif, Georgia, "Times New Roman", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
  --container: 760px;
}

/* =========================================================
   Reset
   ========================================================= */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--accent); }
a:hover { color: var(--accent-dark); }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; line-height: 1.2; margin: 0 0 0.5em; color: var(--ink); }
p { margin: 0 0 1em; color: var(--ink-soft); }
ul, ol { color: var(--ink-soft); }
button { font-family: inherit; }

/* Visible, robust focus states everywhere (WAVE / a11y requirement) */
a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 4px;
}

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

/* Skip link */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: #fff;
  padding: 0.75em 1.25em;
  z-index: 1000;
  border-radius: 0 0 var(--radius-sm) 0;
  text-decoration: none;
}
.skip-link:focus {
  left: 0;
}

/* =========================================================
   Layout helpers
   ========================================================= */
.wrap {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}
.section {
  padding: 48px 0;
  border-top: 1px solid var(--border);
}
.section:first-of-type { border-top: none; }
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-soft-text);
  font-weight: 600;
  margin-bottom: 0.6em;
  display: block;
}

/* =========================================================
   Header
   ========================================================= */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  max-width: 900px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
}
.logo:hover { color: var(--ink); }
.logo-mark {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
}
.logo-text {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}
.logo-text .dot { color: var(--accent); }

/* Hamburger */
.menu-toggle {
  background: none;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--ink);
}
.menu-toggle:hover { border-color: var(--ink); }
.menu-toggle svg { width: 20px; height: 20px; }

.site-nav {
  position: fixed;
  inset: 68px 0 0 0;
  background: var(--surface);
  transform: translateY(-8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
  border-top: 1px solid var(--border);
  overflow-y: auto;
}
.site-nav[data-open="true"] {
  opacity: 1;
  transform: translateY(0);
  visibility: visible;
}
.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 24px 20px;
  max-width: 900px;
  margin: 0 auto;
}
.site-nav li { border-bottom: 1px solid var(--border); }
.site-nav a {
  display: block;
  padding: 16px 4px;
  color: var(--ink);
  text-decoration: none;
  font-size: 1.05rem;
}
.site-nav a:hover { color: var(--accent); }

/* =========================================================
   Hero / Tool
   ========================================================= */
.hero {
  padding: 44px 0 40px;
}
.hero h1 {
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  margin-bottom: 0.35em;
}
.hero .lede {
  font-size: 1.08rem;
  max-width: 56ch;
}

.tool-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: 0 1px 2px rgba(28, 43, 43, 0.04);
}

.tool-form {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.field {
  flex: 1 1 260px;
}
.field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}
.field input {
  width: 100%;
  height: 50px;
  padding: 0 14px;
  font-size: 1.1rem;
  font-family: var(--font-mono);
  border: 1.5px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--ink);
  box-sizing: border-box;
}
.field input:focus {
  outline: none;
  border-color: var(--ink);
  background: var(--surface);
}
.hint {
  display: block;
  font-size: 0.8rem;
  color: var(--ink-faint);
  margin-top: 8px;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0 26px;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  height: 50px;
  align-self: flex-end;
  transition: background 0.15s ease;
}
.btn-primary:hover { background: var(--accent-dark); }

#error-message {
  color: var(--error);
  background: var(--error-bg);
  border: 1px solid var(--error);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  margin-top: 16px;
  font-size: 0.92rem;
}

/* Results — styled after a cheque's "amount in words" field */
.results {
  margin-top: 24px;
  display: grid;
  gap: 14px;
}
.result-row {
  border: 1px dashed var(--accent-soft);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  background: repeating-linear-gradient(
    135deg,
    rgba(168, 117, 44, 0.04),
    rgba(168, 117, 44, 0.04) 6px,
    transparent 6px,
    transparent 12px
  );
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
}
.result-row .result-body { flex: 1; min-width: 0; }
.result-row .result-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-soft-text);
  font-weight: 700;
  display: block;
  margin-bottom: 6px;
}
.result-row .result-value {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--ink);
  word-break: break-word;
}
.copy-btn {
  flex-shrink: 0;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--ink-soft);
  position: relative;
}
.copy-btn:hover { border-color: var(--ink); color: var(--ink); }
.copy-btn svg { width: 18px; height: 18px; }
.copy-btn[data-copied="true"] { color: #2f6e3f; border-color: #2f6e3f; }

.copy-tooltip {
  position: absolute;
  bottom: calc(100% + 8px);
  right: 0;
  background: var(--ink);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.15s ease, transform 0.15s ease;
  pointer-events: none;
}
.copy-tooltip::after {
  content: "";
  position: absolute;
  top: 100%;
  right: 12px;
  border: 5px solid transparent;
  border-top-color: var(--ink);
}
.copy-btn[data-copied="true"] .copy-tooltip {
  opacity: 1;
  transform: translateY(0);
}

/* =========================================================
   Content sections
   ========================================================= */
.rules-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 0.95rem;
}
.rules-table caption {
  text-align: left;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}
.rules-table th, .rules-table td {
  border: 1px solid var(--border);
  padding: 10px 12px;
  text-align: left;
  color: var(--ink-soft);
}
.rules-table th {
  background: var(--bg);
  color: var(--ink);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.rules-table td code, .rules-table td .num {
  font-family: var(--font-mono);
  color: var(--ink);
}

.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 4px 0;
}
.faq-item summary {
  cursor: pointer;
  padding: 14px 4px;
  font-weight: 600;
  color: var(--ink);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.3rem;
  color: var(--accent-soft-text);
  flex-shrink: 0;
}
.faq-item[open] summary::after { content: "–"; }
.faq-item p { padding: 0 4px 16px; }

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 36px 0 28px;
  margin-top: 24px;
  text-align: center;
}
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 20px;
  list-style: none;
  padding: 0;
  margin: 0 0 18px;
  font-size: 0.9rem;
}
.footer-nav a { color: var(--ink-soft); text-decoration: none; }
.footer-nav a:hover { color: var(--accent); text-decoration: underline; }
.site-footer .copyright {
  font-size: 0.85rem;
  color: var(--ink-faint);
  margin: 0;
}

/* Legal / static page content */
.legal-content h2 { margin-top: 1.6em; font-size: 1.25rem; }
.legal-content { max-width: 68ch; }
.legal-content ul { padding-left: 1.2em; }
.updated-note {
  font-size: 0.85rem;
  color: var(--ink-faint);
  margin-bottom: 2em;
}

/* =========================================================
   Responsive
   ========================================================= */
@media (min-width: 700px) {
  .site-nav {
    position: static;
    inset: auto;
    opacity: 1;
    visibility: visible;
    transform: none;
    border-top: none;
    display: none;
  }
  .site-nav[data-open="true"] { display: block; position: absolute; inset: 68px 0 auto 0; box-shadow: 0 8px 20px rgba(28,43,43,0.08); }
  .site-nav ul { padding: 8px 20px; max-width: 900px; }
}

@media (max-width: 480px) {
  .tool-form { flex-direction: column; }
  .field { flex: 1 1 auto; width: 100%; }
  .btn-primary { width: 100%; align-self: stretch; }
}