/* BirdNET-Pi Enhanced — site styles
   Palette echoes the app itself: teal accent, slate text, off-white ground. */

:root {
  --teal: #0d7d78;
  --teal-bright: #14a09a;
  --teal-dark: #0a5f5b;
  --slate-900: #14202b;
  --slate-800: #1e2d3a;
  --slate-600: #47606f;
  --slate-400: #7b909e;
  --ground: #f7f9f9;
  --card: #ffffff;
  --line: #dfe7e9;
  --code-bg: #14202b;
  --code-fg: #e6f1f0;
  --amber: #b26b00;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(20, 32, 43, .05), 0 4px 16px rgba(20, 32, 43, .06);
  --wrap: 1080px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --teal: #3fb8b1;
    --teal-bright: #55d0c8;
    --teal-dark: #2a9a94;
    --slate-900: #e8eef1;
    --slate-800: #d2dde3;
    --slate-600: #9fb2bd;
    --slate-400: #6f8794;
    --ground: #0f171e;
    --card: #17222c;
    --line: #26343f;
    --code-bg: #0a1117;
    --code-fg: #d7e6e4;
    --amber: #e2a33c;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 4px 16px rgba(0, 0, 0, .25);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  color: var(--slate-800);
  background: var(--ground);
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 22px; }

/* ---------- header / nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--ground) 88%, transparent);
  backdrop-filter: saturate(1.6) blur(10px);
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 62px;
  flex-wrap: wrap;
}

.brand {
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--slate-900);
  text-decoration: none;
  letter-spacing: -.01em;
  white-space: nowrap;
}
.brand span { color: var(--teal); }

.site-nav { display: flex; gap: 4px; flex-wrap: wrap; margin-left: auto; }
.site-nav a {
  color: var(--slate-600);
  text-decoration: none;
  font-size: .93rem;
  padding: 6px 11px;
  border-radius: 8px;
  white-space: nowrap;
}
.site-nav a:hover { color: var(--teal); background: color-mix(in srgb, var(--teal) 9%, transparent); }
.site-nav a[aria-current="page"] { color: var(--teal); font-weight: 600; }

/* ---------- typography ---------- */

h1 {
  font-size: clamp(2rem, 4.6vw, 2.9rem);
  line-height: 1.15;
  letter-spacing: -.025em;
  color: var(--slate-900);
  margin: 0 0 .45em;
}

h2 {
  font-size: clamp(1.35rem, 2.6vw, 1.72rem);
  line-height: 1.25;
  letter-spacing: -.018em;
  color: var(--slate-900);
  margin: 2.4em 0 .6em;
}

h3 {
  font-size: 1.13rem;
  color: var(--slate-900);
  margin: 1.9em 0 .45em;
}

/* Deep links land clear of the sticky header rather than under it */
h2[id], h3[id] { scroll-margin-top: 86px; }

p { margin: 0 0 1.05em; }

a { color: var(--teal-dark); }
@media (prefers-color-scheme: dark) { a { color: var(--teal-bright); } }

.lead {
  font-size: clamp(1.06rem, 2vw, 1.22rem);
  color: var(--slate-600);
  max-width: 62ch;
  margin-bottom: 1.6em;
}

.kicker {
  text-transform: uppercase;
  letter-spacing: .1em;
  font-size: .76rem;
  font-weight: 700;
  color: var(--teal);
  margin: 0 0 .7em;
}

main { padding: 46px 0 40px; }

/* ---------- hero ---------- */

.hero { padding: 20px 0 8px; }
.hero h1 { max-width: 20ch; }

.cta-row { display: flex; flex-wrap: wrap; gap: 11px; margin: 1.7em 0 .5em; }

.btn {
  display: inline-block;
  padding: 11px 20px;
  border-radius: 9px;
  font-weight: 600;
  font-size: .96rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform .12s ease, box-shadow .12s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--teal); color: #fff; box-shadow: var(--shadow); }
.btn-primary:hover { background: var(--teal-dark); }
@media (prefers-color-scheme: dark) { .btn-primary { color: #06221f; } }
.btn-ghost { border-color: var(--line); color: var(--slate-800); background: var(--card); }
.btn-ghost:hover { border-color: var(--teal); color: var(--teal); }

/* ---------- cards & grids ---------- */

.grid { display: grid; gap: 18px; margin: 1.5em 0; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(232px, 1fr)); }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
  box-shadow: var(--shadow);
}
.card h3 { margin-top: 0; }
.card p:last-child { margin-bottom: 0; }
.card-icon { font-size: 1.5rem; line-height: 1; display: block; margin-bottom: .5em; }

/* ---------- callouts ---------- */

.note {
  border-left: 3px solid var(--teal);
  background: color-mix(in srgb, var(--teal) 7%, transparent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 15px 20px;
  margin: 1.6em 0;
}
.note.warn { border-left-color: var(--amber); background: color-mix(in srgb, var(--amber) 9%, transparent); }
.note p:last-child { margin-bottom: 0; }
.note strong { color: var(--slate-900); }

/* ---------- code ---------- */

pre {
  background: var(--code-bg);
  color: var(--code-fg);
  padding: 15px 18px;
  border-radius: 10px;
  overflow-x: auto;
  font-size: .875rem;
  line-height: 1.55;
  margin: 1.1em 0;
}
code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: .89em;
}
p code, li code, td code {
  background: color-mix(in srgb, var(--teal) 11%, transparent);
  color: var(--teal-dark);
  padding: .12em .4em;
  border-radius: 5px;
}
@media (prefers-color-scheme: dark) { p code, li code, td code { color: var(--teal-bright); } }
pre code { background: none; color: inherit; padding: 0; }

/* ---------- images ---------- */

figure { margin: 1.9em 0; }
figure img, .shot img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
figcaption {
  font-size: .88rem;
  color: var(--slate-400);
  margin-top: .65em;
  text-align: center;
}

/* ---------- tables ---------- */

.table-scroll { overflow-x: auto; margin: 1.5em 0; -webkit-overflow-scrolling: touch; }
table { border-collapse: collapse; width: 100%; min-width: 520px; font-size: .95rem; }
th, td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--slate-900); font-weight: 650; background: color-mix(in srgb, var(--teal) 6%, transparent); }
td.yes { color: var(--teal); font-weight: 600; }
td.no { color: var(--slate-400); }

/* ---------- lists ---------- */

ul, ol { padding-left: 1.3em; margin: 0 0 1.1em; }
li { margin-bottom: .42em; }
ul.plain { list-style: none; padding-left: 0; }
ul.plain li { padding-left: 1.6em; position: relative; }
ul.plain li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  color: var(--teal);
  font-weight: 700;
}

/* ---------- FAQ ---------- */

details {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 20px;
  margin-bottom: 11px;
  box-shadow: var(--shadow);
}
summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--slate-900);
  list-style: none;
  padding-right: 22px;
  position: relative;
}
summary::-webkit-details-marker { display: none; }
summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: -2px;
  color: var(--teal);
  font-size: 1.3rem;
  line-height: 1;
}
details[open] summary::after { content: "\2013"; }
details[open] summary { margin-bottom: .7em; }
details > *:last-child { margin-bottom: 0; }

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 60px;
  padding: 34px 0 44px;
  color: var(--slate-400);
  font-size: .9rem;
}
.site-footer a { color: var(--slate-600); text-decoration: none; }
.site-footer a:hover { color: var(--teal); text-decoration: underline; }
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-bottom: 18px; }

/* ---------- misc ---------- */

.next-steps {
  display: flex;
  flex-wrap: wrap;
  gap: 11px;
  margin-top: 2.4em;
  padding-top: 1.6em;
  border-top: 1px solid var(--line);
}

.skip-link {
  position: absolute;
  left: -9999px;
  background: var(--teal);
  color: #fff;
  padding: 10px 16px;
  border-radius: 0 0 8px 0;
  z-index: 100;
}
.skip-link:focus { left: 0; top: 0; }

:focus-visible { outline: 2px solid var(--teal); outline-offset: 2px; border-radius: 4px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
  .btn:hover { transform: none; }
}

@media (max-width: 620px) {
  body { font-size: 16px; }
  .site-header .wrap { min-height: 56px; }
  .site-nav { width: 100%; margin-left: 0; padding-bottom: 8px; }
  .btn { width: 100%; text-align: center; }
}