/* Flight School Map. Palette borrowed from FAA sectional charts:
   ink navy (text), chart blue (towered airports), chart magenta (non-towered airports, brand mark),
   chart paper and terrain tan (backgrounds). */
:root {
  --ink: #0E2A47;
  --muted: #475569;
  --blue: #1E5AA8;
  --blue-dark: #174A8B;
  --magenta: #A21C6E;
  --paper: #FAF8F3;
  --tan: #F1EAD9;
  --line: #DCD4C2;
  --white: #FFFFFF;
  --ok: #1B6B3A;
  --err: #A3261D;
  --radius: 12px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 18px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--blue); text-underline-offset: 2px; }
a:hover { color: var(--blue-dark); }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; }
h1 { font-size: clamp(30px, 5vw, 44px); letter-spacing: -.01em; }
h2 { font-size: 24px; }
h3 { font-size: 20px; }
p { margin: 0 0 1em; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 760px; }
.fine { font-size: 16px; color: var(--muted); }
abbr { text-decoration: none; }

.site-header { background: var(--white); border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 24px; padding-top: 12px; padding-bottom: 12px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 700; font-size: 20px; }
.brand svg { width: 32px; height: 32px; flex: none; }
.nav { display: flex; flex-wrap: wrap; gap: 4px 18px; }
.nav a { color: var(--ink); text-decoration: none; font-size: 17px; padding: 4px 0; }
.nav a[aria-current="page"], .nav a:hover { color: var(--magenta); }

/* Hero with a faint sectional-chart graticule */
.hero { background-color: var(--tan); background-image:
  linear-gradient(rgba(14,42,71,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(14,42,71,.06) 1px, transparent 1px);
  background-size: 56px 56px; padding: 56px 0 44px; }
.hero.small { padding: 36px 0 28px; }
.lede { font-size: 20px; max-width: 46em; }
.crumb { font-size: 16px; color: var(--muted); }
.crumb a { color: var(--muted); }

.picker { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin: 20px 0 12px; }
.picker label { font-weight: 600; }
select, input[type=email], input[type=text], input[type=number] { font: inherit; font-size: 17px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--white); color: var(--ink); min-width: 0; max-width: 100%; }
button, .btn { display: inline-block; font: inherit; font-size: 17px; font-weight: 600; padding: 10px 18px; border: 0; border-radius: 8px; background: var(--blue); color: var(--white); text-decoration: none; cursor: pointer; }
button:hover, .btn:hover { background: var(--blue-dark); color: var(--white); }
button:disabled { opacity: .6; cursor: progress; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { font-size: 16px; padding: 4px 12px; border: 1px solid var(--line); border-radius: 999px; background: var(--white); color: var(--ink); text-decoration: none; }
.chip:hover { border-color: var(--magenta); color: var(--magenta); }

.three { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; padding-top: 40px; padding-bottom: 8px; }
.cols { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); gap: 32px; padding-top: 32px; }
@media (max-width: 820px) { .cols { grid-template-columns: minmax(0, 1fr); } }

.schools { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.school { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; }
.school h3 { margin-bottom: 4px; }
.school h3 a { color: var(--ink); }
.school p { margin: 0 0 4px; }
.where { color: var(--muted); font-size: 16px; }
.fact { display: inline-block; font-size: 15px; padding: 2px 10px; border-radius: 999px; background: #E8EFF8; color: var(--blue-dark); }
.links a { font-size: 16px; }
.empty { color: var(--muted); }

.box { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; margin-bottom: 16px; }
.box h2 { font-size: 20px; }
.plain { margin: 0; padding-left: 18px; }

.states { list-style: none; margin: 32px 0 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 10px; }
.states a { display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 12px 14px; background: var(--white); border: 1px solid var(--line); border-radius: 10px; color: var(--ink); text-decoration: none; }
.states a:hover { border-color: var(--magenta); }
.count { font-size: 15px; font-weight: 700; color: var(--magenta); }

.ticks { padding-left: 22px; margin: 28px 0; }
.prose { padding-top: 32px; padding-bottom: 16px; }
.prose ul { padding-left: 22px; }
.prose table { border-collapse: collapse; width: 100%; font-size: 16px; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; }

.signup { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; margin: 40px 0; }
.signup form { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; align-items: end; }
.signup label { display: grid; gap: 4px; font-size: 16px; font-weight: 600; }
.signup .status { grid-column: 1 / -1; margin: 0; }
.signup .hp { position: absolute; left: -9999px; }
.status.ok { color: var(--ok); }
.status.err { color: var(--err); }

.site-footer { margin-top: 56px; padding: 28px 0 40px; background: var(--ink); color: #D8E0EA; font-size: 16px; }
.site-footer a { color: var(--white); }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 6px 18px; }

/* Calculators */
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.section-h { margin-top: 40px; }
.warn { background: #FBEFF5; border: 1px solid #E7B8D1; border-radius: 10px; padding: 12px 14px; font-size: 16px; margin: 0 0 18px; }
.calc { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.calc-form { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 14px; }
.calc-form label { display: grid; gap: 4px; font-size: 16px; font-weight: 600; align-content: end; }
.calc-form input, .calc-form select { width: 100%; }
.calc-form fieldset { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 12px; border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; margin: 0; min-width: 0; }
.calc-form legend { font-weight: 700; padding: 0 6px; }
.unit { font-weight: 400; color: var(--muted); font-size: 15px; }
.results { margin-top: 20px; display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; }
.results > p { grid-column: 1 / -1; margin: 0; }
.res { background: var(--paper); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; display: grid; gap: 2px; }
.res-label { font-size: 15px; color: var(--muted); font-weight: 600; }
.res-value { font-size: 28px; font-weight: 700; color: var(--ink); }
.res-note { font-size: 15px; color: var(--muted); }
.res:first-child .res-value { color: var(--magenta); }
.wind-diagram { display: block; width: 100%; max-width: 260px; margin: 20px auto 0; }
.calc-list { list-style: none; margin: 16px 0 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.calc-list a { display: grid; gap: 6px; height: 100%; padding: 16px 18px; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); color: var(--ink); text-decoration: none; }
.calc-list a:hover { border-color: var(--magenta); }
.calc-list strong { font-size: 19px; color: var(--blue); }
.calc-list span { font-size: 16px; color: var(--muted); }