/* Neurosurgery Plus website. System fonts only, light and dark mode. */

:root {
  --brand: #1e6091;
  --text: #1a1a1a;
  --muted: #666;
  --bg: #f5f5f5;
  --card: #ffffff;
  --border: #e2e2e2;
  --box-bg: #e8f0f6;
  --box-border: #c6d8e6;
  --link: #1e6091;
}

@media (prefers-color-scheme: dark) {
  :root {
    --brand: #6fa8d6;
    --text: #e8e8e8;
    --muted: #a0a0a0;
    --bg: #121416;
    --card: #1c1f22;
    --border: #2e3338;
    --box-bg: #16283a;
    --box-border: #26445f;
    --link: #8cc0ea;
  }
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

a {
  color: var(--link);
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 16px 40px;
}

/* --- Header and footer --- */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 16px;
  max-width: 760px;
  margin: 0 auto;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  font-size: 18px;
  text-decoration: none;
}

.brand img {
  border-radius: 8px;
}

.site-header nav a {
  font-weight: 600;
  text-decoration: none;
}

.site-footer {
  max-width: 760px;
  margin: 0 auto;
  padding: 20px 16px 32px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--muted);
  text-align: center;
}

.site-footer nav {
  line-height: 2;
  overflow-wrap: anywhere;
}

.site-footer p {
  margin: 10px 0 0;
}

/* --- Home --- */

.hero {
  text-align: center;
  padding: 16px 0 8px;
}

.hero img {
  border-radius: 22px;
}

.hero h1 {
  margin: 12px 0 0;
  font-size: 34px;
  line-height: 1.2;
  color: var(--brand);
}

.tagline {
  margin: 6px 0 14px;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.intro {
  margin: 0 auto;
  max-width: 600px;
  font-size: 17px;
}

.features {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 28px 0;
}

@media (min-width: 640px) {
  .features {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}

.feature h2 {
  margin: 0 0 6px;
  font-size: 18px;
  color: var(--brand);
}

.feature p {
  margin: 0;
  font-size: 15px;
}

/* Screenshots: a row that scrolls sideways on phones, all six on wide screens. */
.shots {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 4px 2px 12px;
  -webkit-overflow-scrolling: touch;
}

.shots img {
  flex: 0 0 auto;
  width: 46%;
  max-width: 200px;
  height: auto;
  border-radius: 14px;
  border: 1px solid var(--border);
  scroll-snap-align: start;
}

@media (min-width: 760px) {
  .shots {
    overflow-x: visible;
  }

  .shots img {
    flex: 1 1 0;
    width: auto;
    min-width: 0;
  }
}

.store {
  text-align: center;
  margin: 20px 0;
  font-weight: 600;
}

.organisers {
  background: var(--box-bg);
  border: 1px solid var(--box-border);
  border-radius: 12px;
  padding: 16px;
  margin-top: 24px;
}

.organisers h2 {
  margin: 0 0 6px;
  font-size: 18px;
}

.organisers p {
  margin: 0;
}

/* --- Legal and support pages --- */

.legal h1,
.support h1,
.not-found h1 {
  font-size: 28px;
  line-height: 1.25;
  margin: 8px 0 12px;
  color: var(--brand);
}

.legal h2 {
  font-size: 19px;
  line-height: 1.3;
  margin: 28px 0 8px;
}

.legal p,
.legal li {
  overflow-wrap: anywhere;
}

.legal ul {
  padding-left: 22px;
}

.legal li {
  margin-bottom: 4px;
}

.effective {
  color: var(--muted);
  font-size: 14px;
}

.box {
  background: var(--box-bg);
  border: 1px solid var(--box-border);
  border-radius: 12px;
  padding: 4px 18px;
  margin: 18px 0 8px;
}

.box h2 {
  color: var(--brand);
  margin-top: 14px;
}

.support p {
  margin: 0 0 14px;
}