/* PetYears Now — minimal static styles (system fonts, no CDN) */
:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #5c6570;
  --border: #e2e6ea;
  --accent: #0d7a5f;
  --accent-hover: #0a634d;
  --accent-soft: #e8f6f1;
  --warn-bg: #fff8e6;
  --warn-border: #f0d78c;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  --max: 720px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--accent-hover);
}

img {
  max-width: 100%;
  height: auto;
}

.wrap {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.wrap-wide {
  width: min(100% - 2rem, 900px);
  margin-inline: auto;
}

/* Header / nav */
.site-header {
  border-bottom: 1px solid var(--border);
  background: #fafbfc;
  position: sticky;
  top: 0;
  z-index: 20;
}

.site-header .inner {
  width: min(100% - 2rem, 900px);
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  padding: 0.75rem 0;
}

.logo {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo span {
  color: var(--accent);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.9rem;
  font-size: 0.92rem;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--accent);
  text-decoration: underline;
}

/* Typography */
h1 {
  font-size: clamp(1.6rem, 4vw, 2.1rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 0 0 0.75rem;
}

h2 {
  font-size: 1.35rem;
  margin: 2rem 0 0.75rem;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.1rem;
  margin: 1.25rem 0 0.5rem;
}

p {
  margin: 0 0 1rem;
}

.lead {
  font-size: 1.05rem;
  color: var(--muted);
}

/* Answer / GEO block */
.answer-block {
  background: var(--accent-soft);
  border: 1px solid #c5e8db;
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
  margin: 1rem 0 1.5rem;
}

.answer-block p:last-child {
  margin-bottom: 0;
}

/* Calculator card */
.calc-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  background: #fff;
  margin: 1.25rem 0;
}

.calc-card .fields {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr 1fr;
}

@media (max-width: 560px) {
  .calc-card .fields {
    grid-template-columns: 1fr;
  }
}

label {
  display: block;
  font-weight: 600;
  font-size: 0.92rem;
  margin-bottom: 0.35rem;
}

.hint {
  display: block;
  font-weight: 400;
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.2rem;
}

input[type="number"],
select {
  width: 100%;
  padding: 0.65rem 0.75rem;
  font-size: 1rem;
  font-family: inherit;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
}

input[type="number"]:focus,
select:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}

.btn {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.75rem 1.25rem;
  font-size: 1rem;
  font-weight: 650;
  font-family: inherit;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover {
  background: var(--accent-hover);
  color: #fff;
}

.btn-secondary {
  background: #fff;
  color: var(--accent);
  border: 2px solid var(--accent);
}

.btn-secondary:hover {
  background: var(--accent-soft);
  color: var(--accent-hover);
}

.result-box {
  margin-top: 1.15rem;
  padding: 1rem 1.1rem;
  background: var(--accent-soft);
  border-radius: 8px;
  border: 1px solid #c5e8db;
}

.result-box .human-years {
  font-size: 2.4rem;
  font-weight: 750;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--accent);
}

.result-box .human-years small {
  font-size: 1rem;
  font-weight: 600;
  color: var(--muted);
  margin-left: 0.25rem;
}

.result-meta {
  margin: 0.4rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Tables */
.table-wrap {
  overflow-x: auto;
  margin: 1rem 0 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th,
td {
  padding: 0.55rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  background: #f4f6f8;
  font-weight: 650;
  white-space: nowrap;
}

tr:last-child td {
  border-bottom: none;
}

tbody tr:nth-child(even) {
  background: #fafbfc;
}

/* Ad slot placeholder */
.ad-slot {
  min-height: 90px;
  margin: 1.5rem 0;
  border: 1px dashed #c9d0d6;
  border-radius: var(--radius);
  background: #f8f9fa;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #9aa3ab;
  font-size: 0.8rem;
}

.ad-slot::before {
  content: "Ad slot (AdSense placeholder — no script)";
}

/* Examples / cards */
.examples {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  margin: 1rem 0 1.5rem;
}

.example-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.85rem;
  background: #fff;
}

.example-card strong {
  display: block;
  font-size: 1.15rem;
  color: var(--accent);
}

.example-card span {
  font-size: 0.85rem;
  color: var(--muted);
}

/* Related / footer */
.related {
  margin: 2rem 0;
  padding: 1.15rem;
  background: #f4f6f8;
  border-radius: var(--radius);
}

.related ul {
  margin: 0.5rem 0 0;
  padding-left: 1.2rem;
}

.related li {
  margin: 0.3rem 0;
}

.disclaimer {
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  font-size: 0.9rem;
  color: #5a4a20;
  margin: 1.5rem 0;
}

.site-footer {
  margin-top: 3rem;
  padding: 1.5rem 0 2.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.88rem;
  color: var(--muted);
}

.site-footer .inner {
  width: min(100% - 2rem, 900px);
  margin-inline: auto;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-bottom: 0.75rem;
}

.site-footer a {
  color: var(--muted);
}

main {
  padding: 1.5rem 0 0.5rem;
}

.cite-list {
  font-size: 0.92rem;
}

.cite-list li {
  margin: 0.35rem 0;
}

.faq details {
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 0;
}

.faq summary {
  font-weight: 650;
  cursor: pointer;
  list-style: none;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::before {
  content: "+ ";
  color: var(--accent);
  font-weight: 700;
}

.faq details[open] summary::before {
  content: "− ";
}

.faq details p {
  margin: 0.5rem 0 0.25rem;
  color: var(--muted);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.25rem 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}