/* InvoiceNudge — design system */
:root {
  --ink: #17251f;
  --ink-soft: #46564f;
  --ink-faint: #6b7a73;
  --bg: #f7f8f6;
  --surface: #ffffff;
  --line: #e3e8e4;
  --accent: #0c7a5a;
  --accent-dark: #095c44;
  --accent-soft: #e6f3ee;
  --warn: #b45309;
  --warn-soft: #fdf3e3;
  --danger: #b3362b;
  --danger-soft: #faeae8;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(23, 37, 31, 0.05), 0 8px 24px rgba(23, 37, 31, 0.07);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; }
a { color: var(--accent); }
a:hover { color: var(--accent-dark); }

.wrap { max-width: 1060px; margin: 0 auto; padding: 0 20px; }
.wrap-narrow { max-width: 760px; margin: 0 auto; padding: 0 20px; }

/* Nav */
.nav {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 50;
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 14px 0;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 800;
  font-size: 1.12rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.brand-mark {
  width: 30px; height: 30px;
  border-radius: 8px;
  background: var(--accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex: none;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
  flex-wrap: wrap;
}
.nav-links a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.93rem;
  font-weight: 600;
  padding: 7px 11px;
  border-radius: 8px;
}
.nav-links a:hover { background: var(--accent-soft); color: var(--accent-dark); }
.nav-links a.nav-cta {
  background: var(--accent);
  color: #fff;
  margin-left: 6px;
}
.nav-links a.nav-cta:hover { background: var(--accent-dark); color: #fff; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font: inherit;
  font-weight: 700;
  font-size: 0.98rem;
  padding: 12px 22px;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, transform 0.05s;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); color: #fff; }
.btn-secondary {
  background: var(--surface);
  color: var(--ink);
  border-color: var(--line);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent-dark); }
.btn-big { font-size: 1.08rem; padding: 15px 30px; }

/* Hero */
.hero { padding: 56px 0 30px; text-align: center; }
.hero h1 {
  font-size: clamp(1.9rem, 4.5vw, 2.9rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 0 0 14px;
}
.hero p.lede {
  font-size: 1.13rem;
  color: var(--ink-soft);
  max-width: 620px;
  margin: 0 auto 8px;
}
.hero .hl { color: var(--accent-dark); }
.badges {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 18px;
}
.badge {
  font-size: 0.83rem;
  font-weight: 600;
  color: var(--accent-dark);
  background: var(--accent-soft);
  border: 1px solid #cbe5db;
  padding: 5px 12px;
  border-radius: 999px;
}

/* Cards / panels */
.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.tool-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 22px;
  align-items: start;
  margin: 30px 0 10px;
}
@media (max-width: 860px) { .tool-grid { grid-template-columns: 1fr; } }

.form-panel { padding: 26px; }
.form-panel h2, .output-panel h2 {
  margin: 0 0 4px;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}
.form-hint { margin: 0 0 18px; font-size: 0.88rem; color: var(--ink-faint); }

.field { margin-bottom: 15px; }
.field label {
  display: block;
  font-size: 0.86rem;
  font-weight: 700;
  margin-bottom: 5px;
  color: var(--ink-soft);
}
.field input[type="text"],
.field input[type="number"],
.field input[type="date"],
.field input[type="email"],
.field select,
.field textarea {
  width: 100%;
  font: inherit;
  font-size: 0.96rem;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #fff;
  color: var(--ink);
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
  border-color: var(--accent);
}
.field-row { display: flex; gap: 12px; }
.field-row .field { flex: 1; min-width: 0; }
.optional { font-weight: 500; color: var(--ink-faint); }

/* Tone selector */
.tone-row { display: flex; gap: 8px; flex-wrap: wrap; }
.tone-btn {
  flex: 1;
  min-width: 100px;
  font: inherit;
  font-size: 0.9rem;
  font-weight: 700;
  padding: 10px 8px;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink-soft);
  cursor: pointer;
  position: relative;
}
.tone-btn:hover { border-color: var(--accent); }
.tone-btn.active {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent-dark);
}
.tone-btn .rec {
  display: none;
  position: absolute;
  top: -9px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.66rem;
  background: var(--warn);
  color: #fff;
  padding: 1px 8px;
  border-radius: 999px;
  white-space: nowrap;
}
.tone-btn.recommended .rec { display: block; }

.check { display: flex; align-items: flex-start; gap: 9px; margin-bottom: 10px; font-size: 0.92rem; }
.check input { margin-top: 4px; accent-color: var(--accent); }

/* Output */
.output-panel { padding: 26px; position: sticky; top: 84px; }
@media (max-width: 860px) { .output-panel { position: static; } }
.overdue-note {
  font-size: 0.88rem;
  font-weight: 600;
  padding: 8px 13px;
  border-radius: 9px;
  margin: 12px 0;
  background: var(--accent-soft);
  color: var(--accent-dark);
}
.overdue-note.warn { background: var(--warn-soft); color: var(--warn); }
.overdue-note.danger { background: var(--danger-soft); color: var(--danger); }
.subject-line {
  font-weight: 700;
  font-size: 0.95rem;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 10px 13px;
  margin-bottom: 12px;
}
.subject-line span.tag {
  font-size: 0.72rem;
  color: var(--ink-faint);
  font-weight: 600;
  display: block;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.email-body {
  white-space: pre-wrap;
  font-size: 0.93rem;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 16px;
  min-height: 260px;
  line-height: 1.65;
}
.copy-row { display: flex; gap: 10px; margin-top: 14px; flex-wrap: wrap; }
.copy-row .btn { flex: 1; min-width: 130px; font-size: 0.9rem; padding: 11px 14px; }

/* Sections */
.section { padding: 54px 0; }
.section-alt { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section h2.section-title {
  text-align: center;
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}
.section p.section-sub {
  text-align: center;
  color: var(--ink-soft);
  max-width: 560px;
  margin: 0 auto 34px;
}
.cards-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
@media (max-width: 860px) { .cards-3 { grid-template-columns: 1fr; } }
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}
.section-alt .card { background: var(--bg); }
.card h3 { margin: 10px 0 6px; font-size: 1.05rem; }
.card p { margin: 0; font-size: 0.93rem; color: var(--ink-soft); }
.card a.card-link { display: inline-block; margin-top: 12px; font-weight: 700; font-size: 0.92rem; text-decoration: none; }
.card-icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Kit banner */
.kit-banner {
  background: linear-gradient(135deg, #0c3d2e, #0c7a5a);
  color: #fff;
  border-radius: var(--radius);
  padding: 40px 36px;
  display: flex;
  gap: 30px;
  align-items: center;
  flex-wrap: wrap;
}
.kit-banner h2 { margin: 0 0 10px; font-size: 1.55rem; letter-spacing: -0.02em; }
.kit-banner p { margin: 0 0 6px; color: #d7ece4; font-size: 0.98rem; max-width: 520px; }
.kit-banner .kit-copy { flex: 2; min-width: 260px; }
.kit-banner .kit-cta { flex: 1; min-width: 200px; text-align: center; }
.kit-banner .price { font-size: 2.1rem; font-weight: 800; }
.kit-banner .price small { font-size: 1rem; font-weight: 600; color: #a8d4c4; text-decoration: line-through; margin-left: 8px; }
.kit-banner .btn { background: #fff; color: var(--accent-dark); width: 100%; margin-top: 10px; }
.kit-banner .btn:hover { background: #e6f3ee; }
.kit-banner ul { margin: 12px 0 0; padding: 0 0 0 20px; color: #d7ece4; font-size: 0.92rem; }
.kit-banner ul li { margin-bottom: 4px; }

/* FAQ */
.faq { max-width: 720px; margin: 0 auto; }
.faq details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 4px 20px;
  margin-bottom: 10px;
}
.faq summary {
  font-weight: 700;
  font-size: 0.98rem;
  padding: 12px 0;
  cursor: pointer;
}
.faq p { margin: 0 0 16px; color: var(--ink-soft); font-size: 0.94rem; }

/* Article pages */
.article { padding: 48px 0 60px; }
.article h1 { font-size: clamp(1.7rem, 4vw, 2.4rem); letter-spacing: -0.03em; line-height: 1.2; margin: 0 0 10px; }
.article .meta { color: var(--ink-faint); font-size: 0.9rem; margin-bottom: 28px; }
.article h2 { font-size: 1.45rem; letter-spacing: -0.02em; margin: 38px 0 12px; }
.article h3 { font-size: 1.12rem; margin: 28px 0 8px; }
.article p, .article li { color: var(--ink-soft); font-size: 1rem; }
.article .template-box {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 10px;
  padding: 18px 20px;
  margin: 18px 0;
  white-space: pre-wrap;
  font-size: 0.93rem;
  color: var(--ink);
}
.article .tip {
  background: var(--accent-soft);
  border-radius: 10px;
  padding: 14px 18px;
  font-size: 0.94rem;
  margin: 18px 0;
}

/* Invoice generator layout */
.invoice-preview {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 40px;
  font-size: 0.9rem;
}
.inv-head { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; margin-bottom: 28px; }
.inv-head h2 { margin: 0; font-size: 1.7rem; letter-spacing: 0.08em; color: var(--accent-dark); }
.inv-meta { text-align: right; font-size: 0.88rem; color: var(--ink-soft); }
.inv-parties { display: flex; gap: 40px; flex-wrap: wrap; margin-bottom: 26px; }
.inv-parties div { flex: 1; min-width: 180px; }
.inv-parties h4 {
  margin: 0 0 5px;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
}
.inv-parties p { margin: 0; white-space: pre-wrap; }
table.inv-items { width: 100%; border-collapse: collapse; margin-bottom: 18px; }
table.inv-items th {
  text-align: left;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  border-bottom: 2px solid var(--ink);
  padding: 8px 6px;
}
table.inv-items td { padding: 10px 6px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.inv-items .num { text-align: right; white-space: nowrap; }
.inv-totals { margin-left: auto; width: 260px; max-width: 100%; }
.inv-totals .row { display: flex; justify-content: space-between; padding: 6px 6px; }
.inv-totals .grand {
  font-weight: 800;
  font-size: 1.05rem;
  border-top: 2px solid var(--ink);
  margin-top: 4px;
  padding-top: 10px;
}
.inv-notes { margin-top: 26px; font-size: 0.86rem; color: var(--ink-soft); white-space: pre-wrap; }
.items-editor .item-row {
  display: grid;
  grid-template-columns: minmax(0, 3fr) 70px 90px 34px;
  gap: 8px;
  margin-bottom: 8px;
  align-items: center;
}
.items-editor input {
  width: 100%;
  font: inherit;
  font-size: 0.9rem;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
}
.items-editor .del {
  border: none;
  background: var(--danger-soft);
  color: var(--danger);
  border-radius: 8px;
  height: 34px;
  cursor: pointer;
  font-weight: 700;
}
.add-item {
  font: inherit;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--accent-dark);
  background: var(--accent-soft);
  border: none;
  border-radius: 8px;
  padding: 9px 14px;
  cursor: pointer;
}

/* Result box (late fee calc) */
.result-box {
  background: var(--accent-soft);
  border: 1px solid #cbe5db;
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
}
.result-box .big { font-size: 2.2rem; font-weight: 800; color: var(--accent-dark); letter-spacing: -0.02em; }
.result-box .label { font-size: 0.85rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.07em; color: var(--ink-faint); }
.result-grid { display: flex; gap: 14px; margin-top: 18px; flex-wrap: wrap; }
.result-grid div { flex: 1; min-width: 130px; background: #fff; border-radius: 10px; padding: 14px; }
.result-grid .v { font-weight: 800; font-size: 1.15rem; }

/* Kit page */
.kit-hero { text-align: center; padding: 56px 0 20px; }
.kit-hero .eyebrow {
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-dark);
}
.kit-items { max-width: 720px; margin: 30px auto; }
.kit-item {
  display: flex;
  gap: 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  margin-bottom: 14px;
  align-items: flex-start;
}
.kit-item .card-icon { flex: none; }
.kit-item h3 { margin: 0 0 4px; font-size: 1.05rem; }
.kit-item p { margin: 0; font-size: 0.93rem; color: var(--ink-soft); }
.kit-item .val { font-size: 0.8rem; font-weight: 700; color: var(--accent-dark); white-space: nowrap; margin-left: auto; }
.price-card {
  max-width: 440px;
  margin: 36px auto;
  text-align: center;
  padding: 36px 30px;
}
.price-card .price { font-size: 3rem; font-weight: 800; letter-spacing: -0.03em; }
.price-card .price small { font-size: 1.2rem; color: var(--ink-faint); text-decoration: line-through; font-weight: 600; margin-left: 10px; }
.price-card ul { text-align: left; padding-left: 22px; color: var(--ink-soft); font-size: 0.93rem; }
.guarantee { font-size: 0.85rem; color: var(--ink-faint); margin-top: 12px; }

/* Footer */
footer {
  border-top: 1px solid var(--line);
  background: var(--surface);
  padding: 34px 0;
  margin-top: 60px;
}
.foot-inner {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  font-size: 0.88rem;
  color: var(--ink-faint);
}
.foot-inner a { color: var(--ink-soft); text-decoration: none; margin-right: 16px; }
.foot-inner a:hover { color: var(--accent-dark); }
.disclaimer { font-size: 0.78rem; max-width: 520px; }

/* Print: invoice only */
@media print {
  body { background: #fff; }
  .nav, footer, .no-print { display: none !important; }
  .invoice-preview { border: none; box-shadow: none; padding: 0; border-radius: 0; }
  .wrap, .wrap-narrow { max-width: none; padding: 0; }
}