/* PetCost Planners — clean, fast, mobile-first. System fonts, no dependencies. */

:root {
  --ink: #1f2937;
  --muted: #6b7280;
  --line: #e5e7eb;
  --bg: #faf9f7;
  --card: #ffffff;
  --accent: #0f766e;
  --accent-dark: #115e59;
  --warn-bg: #fefce8;
  --warn-line: #eab308;
  --radius: 10px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-size: 17px;
}

.wrap { max-width: 760px; margin: 0 auto; padding: 0 1.1rem; }

/* ---------- header / nav ---------- */
.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.7rem;
  padding-bottom: 0.7rem;
  gap: 1rem;
}
.brand { font-weight: 800; font-size: 1.15rem; color: var(--accent-dark); text-decoration: none; }
.brand span { color: var(--ink); font-weight: 600; }
nav.main-nav { display: flex; gap: 0.15rem; flex-wrap: wrap; }
nav.main-nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.92rem;
  padding: 0.35rem 0.6rem;
  border-radius: 6px;
}
nav.main-nav a:hover { background: #f0fdfa; color: var(--accent-dark); }
nav.main-nav a[aria-current="page"] { color: var(--accent-dark); font-weight: 700; }

/* ---------- hero ---------- */
.hero { padding: 2.2rem 0 1.4rem; }
.hero h1 { font-size: 1.9rem; line-height: 1.25; margin: 0 0 0.6rem; letter-spacing: -0.01em; }
.hero p.lede { font-size: 1.08rem; color: var(--muted); margin: 0; max-width: 60ch; }

/* ---------- calculator card ---------- */
.calc {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin: 1.4rem 0;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.calc h2 { margin-top: 0; font-size: 1.25rem; }

.field { margin-bottom: 1rem; }
.field label { display: block; font-weight: 600; font-size: 0.95rem; margin-bottom: 0.35rem; }
.field .hint { font-size: 0.85rem; color: var(--muted); font-weight: 400; }

.seg { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.seg label {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.55rem 0.9rem;
  cursor: pointer;
  font-size: 0.95rem;
  background: #fff;
  margin: 0;
  font-weight: 500;
}
.seg input[type="radio"] { accent-color: var(--accent); margin-right: 0.35rem; }
.seg label:has(input:checked) { border-color: var(--accent); background: #f0fdfa; font-weight: 700; }

select, input[type="number"], input[type="text"] {
  font-size: 1rem;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  width: 100%;
  max-width: 340px;
  background: #fff;
  color: var(--ink);
}

/* line items */
.lines { list-style: none; margin: 1.2rem 0 0; padding: 0; border-top: 1px solid var(--line); }
.lines li {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.15rem 0.8rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--line);
  align-items: center;
}
.line-name { font-weight: 600; font-size: 0.98rem; }
.line-src { font-size: 0.8rem; color: var(--muted); grid-column: 1; }
.line-range { font-size: 0.85rem; color: var(--muted); grid-column: 1; }
.line-input { grid-column: 2; grid-row: 1 / span 3; width: 7.5rem; }
.line-input input { max-width: 100%; text-align: right; font-weight: 700; }

.total-box {
  background: #f0fdfa;
  border: 1px solid #99f6e4;
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  margin-top: 1.2rem;
}
.total-box .total-row { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; }
.total-box .total-label { font-weight: 700; }
.total-box .total-value { font-size: 1.7rem; font-weight: 800; color: var(--accent-dark); }
.total-box .total-sub { color: var(--muted); font-size: 0.92rem; margin-top: 0.25rem; }

.calc-note { font-size: 0.88rem; color: var(--muted); margin-top: 0.9rem; }

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 0.65rem 1.2rem;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { background: var(--accent-dark); }
.btn-ghost { background: #fff; color: var(--accent-dark); border: 1px solid var(--accent); }
.btn-ghost:hover { background: #f0fdfa; }

/* ---------- callouts ---------- */
.caveat {
  background: var(--warn-bg);
  border: 1px solid var(--warn-line);
  border-radius: var(--radius);
  padding: 0.9rem 1.1rem;
  font-size: 0.93rem;
  margin: 1.2rem 0;
}
.caveat strong { display: block; margin-bottom: 0.2rem; }

.disclaimer {
  border-left: 4px solid var(--accent);
  background: #f0fdfa;
  padding: 0.9rem 1.1rem;
  font-size: 0.92rem;
  margin: 1.4rem 0;
  border-radius: 0 var(--radius) var(--radius) 0;
}

/* ---------- tables ---------- */
table.cost { width: 100%; border-collapse: collapse; margin: 1.1rem 0; font-size: 0.96rem; }
table.cost th, table.cost td { text-align: left; padding: 0.6rem 0.5rem; border-bottom: 1px solid var(--line); }
table.cost th { font-size: 0.88rem; text-transform: uppercase; letter-spacing: 0.03em; color: var(--muted); }
table.cost td.num, table.cost th.num { text-align: right; white-space: nowrap; }
.table-scroll { overflow-x: auto; }

/* ---------- guides ---------- */
.guide-list { list-style: none; padding: 0; margin: 1.2rem 0; display: grid; gap: 0.9rem; }
.guide-list a {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  text-decoration: none;
  color: var(--ink);
}
.guide-list a:hover { border-color: var(--accent); }
.guide-list strong { color: var(--accent-dark); font-size: 1.05rem; }
.guide-list p { margin: 0.3rem 0 0; color: var(--muted); font-size: 0.95rem; }

article.guide h2 { margin-top: 2rem; }
article.guide h3 { margin-top: 1.4rem; }
.checklist { list-style: none; padding: 0; }
.checklist li { padding: 0.5rem 0 0.5rem 2rem; position: relative; border-bottom: 1px dashed var(--line); }
.checklist li::before { content: "☐"; position: absolute; left: 0.4rem; color: var(--accent); font-weight: 700; }

/* ---------- faq ---------- */
.faq { margin: 2rem 0; }
.faq details { background: var(--card); border: 1px solid var(--line); border-radius: 8px; margin-bottom: 0.6rem; padding: 0.8rem 1rem; }
.faq summary { font-weight: 700; cursor: pointer; }
.faq p { margin: 0.5rem 0 0.2rem; color: var(--muted); font-size: 0.97rem; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); margin-top: 2.5rem; padding: 1.6rem 0 2.2rem; font-size: 0.88rem; color: var(--muted); }
.site-footer nav { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 0.8rem; }
.site-footer a { color: var(--muted); }

/* ---------- ad / affiliate placeholders ---------- */
.ad-slot {
  border: 1px dashed var(--line);
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.8rem;
  text-align: center;
  padding: 1.4rem 0.5rem;
  margin: 1.6rem 0;
  background: #fcfcfb;
}
.affil-box { border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.2rem; margin: 1.6rem 0; background: var(--card); }
.affil-box h3 { margin: 0 0 0.4rem; font-size: 1rem; }
.affil-box ul { margin: 0.4rem 0; padding-left: 1.2rem; font-size: 0.95rem; }

.sources { font-size: 0.85rem; color: var(--muted); margin-top: 2rem; }
.sources li { margin-bottom: 0.3rem; }

@media (min-width: 640px) {
  .hero h1 { font-size: 2.3rem; }
  .calc { padding: 1.6rem; }
}