:root {
  color-scheme: light dark;
  --background: #f3f8fa;
  --surface: rgba(255, 255, 255, 0.78);
  --surface-strong: #ffffff;
  --text: #17282e;
  --muted: #5f737b;
  --line: rgba(36, 78, 91, 0.14);
  --accent: #087f9b;
  --accent-soft: rgba(35, 184, 215, 0.13);
  --code: #12272e;
  --code-text: #e9f7fa;
  --shadow: 0 18px 50px rgba(28, 75, 88, 0.09);
  --safe-bottom: max(28px, env(safe-area-inset-bottom));
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--background);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 50% -8%, rgba(98, 213, 232, 0.2), transparent 30rem),
    var(--background);
  font-size: 17px;
  line-height: 1.58;
}

a {
  color: var(--accent);
  text-underline-offset: 0.18em;
}

.manual,
.home {
  width: min(100%, 760px);
  margin: 0 auto;
}

.manual {
  padding: max(36px, env(safe-area-inset-top)) 20px var(--safe-bottom);
}

.manual-header {
  max-width: 650px;
  margin: 0 auto 42px;
  text-align: center;
}

.app-logo-link {
  position: relative;
  display: inline-grid;
  place-items: center;
  width: 88px;
  height: 88px;
  margin-bottom: 23px;
  border-radius: 22px;
  -webkit-tap-highlight-color: transparent;
}

.app-logo {
  position: relative;
  z-index: 1;
  display: block;
  width: 82px;
  height: 82px;
  border-radius: 20px;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.55) inset,
    0 9px 24px rgba(12, 72, 88, 0.2);
}

.app-logo-glow {
  position: absolute;
  inset: -16px;
  border-radius: 38px;
  background:
    radial-gradient(circle at 35% 30%, rgba(255, 255, 255, 0.88), transparent 28%),
    radial-gradient(circle, rgba(65, 205, 226, 0.5), rgba(37, 141, 171, 0.1) 57%, transparent 72%);
  filter: blur(9px);
  opacity: 0.88;
}

.app-logo-link:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 10px;
}

.eyebrow {
  margin: 0 0 9px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

h1,
h2 {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif;
  text-wrap: balance;
}

h1 {
  max-width: 690px;
  margin: 0 auto;
  font-size: clamp(2.05rem, 8vw, 3.55rem);
  line-height: 1.04;
  letter-spacing: -0.04em;
}

.lead {
  max-width: 610px;
  margin: 20px auto 0;
  color: var(--muted);
  font-size: clamp(1.08rem, 3.8vw, 1.25rem);
  line-height: 1.5;
}

.manual-content {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 25px;
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px) saturate(1.1);
  -webkit-backdrop-filter: blur(18px) saturate(1.1);
}

.manual-section {
  padding: 30px 23px 33px;
}

.manual-section + .manual-section {
  border-top: 1px solid var(--line);
}

h2 {
  margin: 0 0 17px;
  font-size: clamp(1.35rem, 5vw, 1.72rem);
  line-height: 1.18;
  letter-spacing: -0.025em;
}

p {
  margin: 0 0 1em;
}

p:last-child {
  margin-bottom: 0;
}

ul,
ol {
  margin: 18px 0;
  padding-left: 1.45rem;
}

li {
  margin: 0 0 0.65rem;
  padding-left: 0.2rem;
}

li::marker {
  color: var(--accent);
  font-weight: 700;
}

dl {
  margin: 18px 0 0;
}

dl div {
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

dt {
  margin-bottom: 4px;
  font-weight: 700;
}

dd {
  margin: 0;
  color: var(--muted);
}

code {
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 0.87em;
}

dt code {
  padding: 0.18em 0.42em;
  border-radius: 6px;
  color: var(--accent);
  background: var(--accent-soft);
}

.code-card {
  max-width: 100%;
  margin: 22px -9px;
  overflow-x: auto;
  border-radius: 15px;
  color: var(--code-text);
  background: var(--code);
  box-shadow: 0 12px 28px rgba(15, 46, 54, 0.15);
  -webkit-overflow-scrolling: touch;
}

pre {
  margin: 0;
  padding: 20px;
  font-size: 0.76rem;
  line-height: 1.55;
}

.note,
.prompt-card {
  margin-top: 22px;
  border-radius: 15px;
  background: var(--accent-soft);
}

.note {
  padding: 15px 17px;
  border-left: 3px solid var(--accent);
  color: var(--text);
  font-size: 0.94rem;
}

.prompt-card {
  padding: 18px;
}

.card-label {
  display: block;
  margin-bottom: 8px;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-footer {
  padding: 34px 5px 8px;
  text-align: center;
}

.footnotes {
  margin-bottom: 28px;
  color: var(--muted);
  font-size: 0.78rem;
  text-align: left;
}

.footnotes p {
  margin-bottom: 0.6rem;
}

.language-switch,
.primary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 10px 17px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  background: var(--surface-strong);
  box-shadow: 0 7px 22px rgba(28, 75, 88, 0.08);
  font-weight: 650;
  text-decoration: none;
}

.footer-brand {
  margin-top: 18px;
  color: var(--muted);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.home {
  display: grid;
  min-height: 100svh;
  place-content: center;
  justify-items: center;
  padding: max(36px, env(safe-area-inset-top)) 24px var(--safe-bottom);
  text-align: center;
}

.home .primary-link {
  margin-top: 28px;
}

@media (min-width: 620px) {
  .manual {
    padding-right: 30px;
    padding-left: 30px;
  }

  .manual-section {
    padding: 40px 44px 43px;
  }

  .code-card {
    margin-right: 0;
    margin-left: 0;
  }

  pre {
    padding: 24px;
    font-size: 0.82rem;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .app-logo-link,
  .language-switch,
  .primary-link {
    transition: transform 160ms ease, box-shadow 160ms ease;
  }

  .app-logo-link:hover,
  .language-switch:hover,
  .primary-link:hover {
    transform: translateY(-2px);
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #071419;
    --surface: rgba(14, 33, 39, 0.83);
    --surface-strong: #11252c;
    --text: #edf7f9;
    --muted: #a4b8be;
    --line: rgba(164, 210, 220, 0.14);
    --accent: #63d1e6;
    --accent-soft: rgba(67, 193, 217, 0.13);
    --code: #02090c;
    --code-text: #e9f7fa;
    --shadow: 0 20px 55px rgba(0, 0, 0, 0.28);
  }

  body {
    background:
      radial-gradient(circle at 50% -8%, rgba(37, 154, 179, 0.17), transparent 30rem),
      var(--background);
  }
}