:root {
  --ink: #1a1a2e;
  --muted: #5a5a72;
  --accent: #2b6cb0;
  --bg: #ffffff;
  --panel: #f5f6fa;
  --border: #e2e4ee;
  --maxw: 880px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-size: 1rem;
  line-height: 1.55;
  overflow-wrap: break-word;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

h1 { font-size: clamp(1.8rem, 7vw, 2.6rem); line-height: 1.15; margin: 0 0 0.75rem; }
h2 { font-size: clamp(1.2rem, 4vw, 1.5rem); line-height: 1.25; margin: 2rem 0 0.75rem; }
p { margin: 0 0 1rem; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--bg);
  color: var(--accent);
  padding: 0.6rem 1rem;
  z-index: 10;
}
.skip-link:focus { left: 0; }

.site-header,
main,
.site-footer {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 1rem;
}

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.5rem;
  padding-block: 1rem;
  border-bottom: 1px solid var(--border);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none;
  color: var(--ink);
}

.brand-mark {
  width: 1.5em;
  height: 1.5em;
  flex-shrink: 0;
}

.site-header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  margin-left: auto;
}
.site-header nav a {
  color: var(--accent);
  text-decoration: none;
  display: inline-block;
  padding: 0.25rem 0;
}
.site-header nav a.nav-cta {
  color: #fff;
  background: var(--accent);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-weight: 600;
}

main { padding-block: 2rem; }

.hero {
  padding-block: 1rem 2rem;
}
.hero p.lead {
  color: var(--muted);
  font-size: clamp(1rem, 2.5vw, 1.15rem);
  max-width: 60ch;
}

.btn {
  display: inline-block;
  padding: 0.85rem 1.5rem;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.05rem;
}
.btn:hover { opacity: 0.92; }
.btn-secondary {
  display: inline-block;
  margin-left: 1rem;
  padding: 0.85rem 1.5rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.feature-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  margin-top: 1rem;
}
.feature-grid > div {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.1rem;
}
.feature-grid h3 { margin: 0 0 0.4rem; font-size: 1rem; }
.feature-grid p { margin: 0; color: var(--muted); font-size: 0.9rem; }

.banner {
  background: var(--panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 10px 10px 0;
  padding: 0.9rem 1.1rem;
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}
.banner a { color: var(--accent); font-weight: 600; }

.game-grid {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 180px), 1fr));
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
}
.game-grid li {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.game-grid a {
  display: block;
  padding: 0.9rem 1rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}
.game-grid a:hover { color: var(--accent); }

.site-footer {
  margin-top: 3rem;
  padding-block: 1.5rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
}
.site-footer p { margin: 0.4rem 0; }
.site-footer a { color: var(--accent); }

main section { margin-top: 2rem; }
main ul { padding-left: 1.2rem; }
main li { margin: 0.3rem 0; }
main a { color: var(--accent); }

.saved-scenarios-list {
  list-style: none;
  margin: 0.75rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.saved-scenarios-list li {
  margin: 0;
  display: flex;
  align-items: stretch;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: var(--panel);
}
.saved-scenarios__load {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.5rem 0.75rem;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.9rem;
}
.saved-scenarios__calc { color: var(--muted); }
.saved-scenarios__delete {
  min-height: 44px;
  padding: 0 0.7rem;
  border: 0;
  border-left: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
}

.faq { margin-top: 2rem; }
.faq details { border-bottom: 1px solid var(--border); }
.faq summary {
  cursor: pointer;
  padding: 0.85rem 0;
  font-weight: 600;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before {
  content: "+";
  display: inline-block;
  width: 1.1em;
  color: var(--muted);
  font-weight: 400;
}
.faq details[open] summary::before { content: "\2212"; }
.faq details > div { padding: 0 0 1rem 1.1em; color: var(--ink); }
.faq details > div p { margin: 0; }