/* MaterialYardage shared stylesheet — v1.7
   Replaces the runtime Tailwind CDN dependency. No build step required. */

:root {
  --bg: #020617;
  --surface: #0f172a;
  --surface-2: #131f37;
  --line: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --faint: #64748b;
  --accent: #34d399;
  --accent-strong: #059669;
  --white: #ffffff;
  --radius: 14px;
  --maxw: 60rem;
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
}

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

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 1rem; }
.narrow { max-width: 48rem; }

/* ---------- Header / nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(2, 6, 23, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 0.85rem;
  padding-bottom: 0.85rem;
}

.brand {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--accent);
  text-decoration: none;
}
.brand span { color: var(--white); }
.brand:hover { text-decoration: none; }

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
}
.nav a { color: var(--muted); text-decoration: none; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--white); }

/* ---------- Typography ---------- */

h1, h2, h3 { color: var(--white); line-height: 1.25; letter-spacing: -0.015em; }
h1 { font-size: 2rem; font-weight: 800; margin: 0 0 0.5rem; }
h2 { font-size: 1.5rem; font-weight: 700; margin: 0 0 0.6rem; }
h3 { font-size: 1.1rem; font-weight: 700; margin: 1.6rem 0 0.4rem; }
p { margin: 0 0 1rem; }
.lede { color: var(--muted); font-size: 1.05rem; max-width: 42rem; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
.fine { font-size: 0.8rem; color: var(--faint); line-height: 1.6; }

main { padding: 2.5rem 0 1rem; }
section.block { padding: 1.6rem 0; border-top: 1px solid var(--line); }
section.block:first-of-type { border-top: 0; }

ul, ol { margin: 0 0 1rem; padding-left: 1.2rem; }
li { margin-bottom: 0.4rem; }

@media (min-width: 640px) {
  h1 { font-size: 2.4rem; }
}

/* ---------- Calculator card ---------- */

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
}
@media (min-width: 640px) { .card { padding: 1.75rem; } }

.toggle {
  display: flex;
  max-width: 22rem;
  background: var(--bg);
  border-radius: 12px;
  padding: 0.25rem;
  margin-bottom: 1.4rem;
}
.toggle button {
  flex: 1;
  border: 0;
  border-radius: 9px;
  padding: 0.55rem 0.75rem;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
}
.toggle button[aria-pressed="true"] { background: var(--accent-strong); color: #fff; }

.grid-2 { display: grid; gap: 1.4rem; }
@media (min-width: 768px) { .grid-2 { grid-template-columns: 1fr 1fr; } }

.field { margin-bottom: 0.9rem; }
.field label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.field input, .field select {
  width: 100%;
  border: 1px solid #334155;
  border-radius: 12px;
  background: var(--bg);
  color: var(--white);
  font: inherit;
  font-weight: 500;
  padding: 0.7rem 0.9rem;
}
.field select { appearance: none; }
.field input:focus, .field select:focus {
  outline: 2px solid transparent;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(52, 211, 153, 0.25);
}

.results {
  display: flex;
  flex-direction: column;
  background: rgba(2, 6, 23, 0.6);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.15rem;
}
.result-label {
  margin: 0;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.result-primary { margin: 0.25rem 0 0; font-size: 2.2rem; font-weight: 800; color: var(--accent); }
.result-secondary { margin: 0.2rem 0 0; font-size: 0.9rem; color: var(--muted); }
.result-alt { margin: 0.25rem 0 0; font-size: 1.8rem; font-weight: 800; color: var(--white); }
.rule { border-top: 1px solid var(--line); margin: 1.1rem 0; }

.link-btn {
  margin-top: auto;
  padding-top: 1rem;
  background: none;
  border: 0;
  font: inherit;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  text-align: left;
  cursor: pointer;
}
.link-btn:hover { color: var(--white); }

.alert {
  margin-top: 1rem;
  border: 1px solid rgba(153, 27, 27, 0.6);
  background: rgba(69, 10, 10, 0.4);
  color: #fca5a5;
  border-radius: 10px;
  padding: 0.7rem 0.9rem;
  font-size: 0.9rem;
}
.hidden { display: none; }

/* ---------- Content components ---------- */

.formula {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem 1.1rem;
  margin: 0 0 1rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9rem;
  line-height: 1.9;
  color: #6ee7b7;
  white-space: pre-wrap;
  overflow-x: auto;
}

.table-scroll { overflow-x: auto; margin: 0 0 1.2rem; }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; min-width: 30rem; }
caption { text-align: left; color: var(--faint); font-size: 0.8rem; padding-bottom: 0.5rem; }
th, td { text-align: left; padding: 0.6rem 0.75rem; border-bottom: 1px solid var(--line); }
th { color: var(--white); font-weight: 700; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; }
tbody tr:nth-child(odd) { background: rgba(15, 23, 42, 0.5); }

.example {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent-strong);
  border-radius: 12px;
  padding: 1.1rem 1.2rem;
  margin: 0 0 1.2rem;
}
.example h3 { margin-top: 0; }
.example p:last-child { margin-bottom: 0; }

.note {
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem 1.1rem;
  margin: 0 0 1.2rem;
  font-size: 0.92rem;
  color: var(--muted);
}

details {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.85rem 1rem;
  margin-bottom: 0.7rem;
}
details summary { cursor: pointer; font-weight: 600; color: var(--white); }
details p { margin: 0.6rem 0 0; color: var(--muted); }

.cards {
  display: grid;
  gap: 0.9rem;
  padding: 0;
  margin: 0 0 1rem;
  list-style: none;
  grid-template-columns: 1fr;
}
@media (min-width: 640px) { .cards { grid-template-columns: 1fr 1fr; } }
@media (min-width: 900px) { .cards.three { grid-template-columns: repeat(3, 1fr); } }

.cards li { margin: 0; }
.cards a {
  display: block;
  height: 100%;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  text-decoration: none;
  color: var(--text);
}
.cards a:hover { border-color: var(--accent-strong); text-decoration: none; }
.cards strong { display: block; color: var(--white); font-size: 1rem; margin-bottom: 0.2rem; }
.cards span { font-size: 0.87rem; color: var(--muted); }

.pill {
  display: inline-block;
  border: 1px solid rgba(52, 211, 153, 0.25);
  background: rgba(52, 211, 153, 0.1);
  color: var(--accent);
  border-radius: 999px;
  padding: 0.2rem 0.7rem;
  font-size: 0.72rem;
  font-weight: 700;
}

.crumbs { font-size: 0.8rem; color: var(--faint); margin-bottom: 0.9rem; }
.crumbs a { color: var(--muted); }

/* ---------- Ad containers ---------- */

.ad-slot {
  margin: 2rem 0;
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.ad-slot ins { display: block; width: 100%; }

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 3rem;
  padding: 2rem 0 2.5rem;
  font-size: 0.85rem;
  color: var(--faint);
}
.footer-nav { display: flex; flex-wrap: wrap; gap: 0.4rem 1.1rem; margin-bottom: 0.9rem; }
.footer-nav a { color: var(--muted); }
.site-footer p { margin: 0.4rem 0 0; }