/* CalcGauge design system — "aeronautical chart" aesthetic.
   Pale chart-blue paper with a fine plotting grid, deep navy ink,
   signal-orange accents, instrument-style mono numerals. */

:root {
  --chart:  #E9F0F5;   /* chart paper */
  --grid:   #CBDAE4;   /* fine grid line */
  --panel:  #FCFDFE;   /* card faces */
  --navy:   #13293D;   /* primary ink */
  --navy2:  #29506B;   /* secondary ink */
  --orange: #E8541A;   /* signal accent */
  --teal:   #0F7A84;   /* secondary accent */
  --ok:     #1E7E46;
  --err:    #B3261E;
  --line:   rgba(19, 41, 61, .28);
  --shadow: 0 3px 0 rgba(19, 41, 61, .14);
  --r: 10px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Archivo', sans-serif;
  color: var(--navy);
  background-color: var(--chart);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px),
    linear-gradient(rgba(203, 218, 228, .45) 1px, transparent 1px),
    linear-gradient(90deg, rgba(203, 218, 228, .45) 1px, transparent 1px);
  background-size: 120px 120px, 120px 120px, 24px 24px, 24px 24px;
  font-size: 16px;
  line-height: 1.6;
}

.mono { font-family: 'Space Mono', monospace; }

.wrap { max-width: 1060px; margin: 0 auto; padding: 0 20px; }

/* ---------- header ---------- */
.nav {
  background: var(--panel);
  border-bottom: 2px solid var(--navy);
  position: sticky; top: 0; z-index: 50;
}
.nav__row { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--navy); }
.brand__mark {
  width: 30px; height: 30px; border-radius: 50%;
  border: 2px solid var(--navy);
  display: grid; place-items: center;
  background: var(--panel);
  color: var(--orange);
  font-size: 15px; line-height: 1;
}
.brand__name { font-weight: 800; font-size: 1.12rem; letter-spacing: -.02em; }
.nav__links { display: flex; gap: 18px; flex-wrap: wrap; }
.nav__links a {
  color: var(--navy2); text-decoration: none; font-weight: 600; font-size: .86rem;
  letter-spacing: .01em;
}
.nav__links a:hover { color: var(--orange); }

/* ---------- page head ---------- */
.phead { padding: 40px 0 8px; max-width: 760px; }
.phead h1 { font-weight: 800; font-size: clamp(1.7rem, 4vw, 2.4rem); letter-spacing: -.03em; line-height: 1.15; }
.phead .lead { color: var(--navy2); margin-top: 10px; font-size: 1.02rem; max-width: 62ch; }

main.wrap { padding-bottom: 56px; }

h2 { font-weight: 800; letter-spacing: -.02em; font-size: 1.25rem; margin: 34px 0 14px; }

/* ---------- calculator panel ---------- */
.calc {
  background: var(--panel);
  border: 1.5px solid var(--navy);
  border-radius: var(--r);
  box-shadow: var(--shadow);
  padding: 26px;
  margin-top: 22px;
}

.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.field label {
  font-family: 'Space Mono', monospace;
  font-size: .68rem; text-transform: uppercase; letter-spacing: .08em;
  color: var(--navy2);
}
input[type="text"], input[type="number"], input[type="date"], input[type="email"], select, textarea {
  font: inherit; color: var(--navy);
  background: #fff;
  border: 1.5px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
}
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(15, 122, 132, .18);
}
input[type="number"] { font-family: 'Space Mono', monospace; }

.row { display: flex; gap: 14px; flex-wrap: wrap; align-items: end; }
.row .field { flex: 1; min-width: 140px; margin-bottom: 0; }

.btn {
  font: inherit; font-weight: 700; font-size: .92rem;
  color: #fff; background: var(--navy);
  border: 1.5px solid var(--navy); border-radius: 8px;
  padding: 10px 20px; cursor: pointer;
  transition: transform .08s ease, background .12s ease;
}
.btn:hover { background: var(--navy2); }
.btn:active { transform: translateY(2px); }
.btn--accent { background: var(--orange); border-color: var(--orange); }
.btn--accent:hover { background: #C74413; }
.btn--ghost { background: transparent; color: var(--navy); }
.btn--ghost:hover { background: rgba(19, 41, 61, .06); }

/* ---------- instrument readout ---------- */
.readout {
  background: var(--navy);
  color: #EAF2F8;
  border-radius: var(--r);
  padding: 20px 24px;
  margin-top: 18px;
  position: relative;
  overflow: hidden;
}
.readout::before {
  /* faint tick marks along the top, like an altimeter bezel */
  content: '';
  position: absolute; inset: 0 0 auto 0; height: 8px;
  background-image: linear-gradient(90deg, rgba(234, 242, 248, .35) 1px, transparent 1px);
  background-size: 14px 100%;
}
.readout__label {
  font-family: 'Space Mono', monospace;
  font-size: .66rem; text-transform: uppercase; letter-spacing: .12em;
  color: #9DB8CB; margin-bottom: 4px;
}
.readout__value {
  font-family: 'Space Mono', monospace;
  font-size: clamp(1.5rem, 4.5vw, 2.3rem);
  font-weight: 700; color: #FFB38A; line-height: 1.2;
  overflow-wrap: anywhere;
}
.readout__value .unit { font-size: .55em; color: #9DB8CB; font-weight: 400; }
.readout__sub { font-family: 'Space Mono', monospace; font-size: .78rem; color: #B9CEDD; margin-top: 8px; }

/* stat strip for secondary results */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 12px; margin-top: 16px; }
.stat {
  background: #fff; border: 1.5px solid var(--line); border-radius: 8px; padding: 12px 14px;
}
.stat b { display: block; font-family: 'Space Mono', monospace; font-size: 1.15rem; color: var(--navy); }
.stat span {
  font-family: 'Space Mono', monospace; font-size: .62rem;
  text-transform: uppercase; letter-spacing: .08em; color: var(--navy2);
}

/* ---------- cards / homepage grid ---------- */
.cat-h {
  display: flex; align-items: center; gap: 10px;
  margin: 36px 0 14px;
}
.cat-h::after { content: ''; flex: 1; height: 1.5px; background: var(--line); }
.cat-h h2 { margin: 0; }
.cat-h .k {
  font-family: 'Space Mono', monospace; font-size: .66rem; color: var(--orange);
  letter-spacing: .1em;
}

.cardgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
.card {
  display: block; text-decoration: none; color: var(--navy);
  background: var(--panel);
  border: 1.5px solid var(--navy);
  border-radius: var(--r);
  box-shadow: var(--shadow);
  padding: 16px 18px;
  transition: transform .1s ease, box-shadow .1s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: 0 5px 0 rgba(19, 41, 61, .18); }
.card__k {
  font-family: 'Space Mono', monospace; font-size: .62rem;
  text-transform: uppercase; letter-spacing: .1em; color: var(--teal);
}
.card h3 { font-size: 1.02rem; font-weight: 700; letter-spacing: -.01em; margin: 3px 0 5px; }
.card p { font-size: .84rem; color: var(--navy2); line-height: 1.45; }

/* ---------- ads ---------- */
.adbox {
  border: 1.5px dashed var(--line);
  border-radius: var(--r);
  background: rgba(252, 253, 254, .7);
  min-height: 100px;
  display: grid; place-items: center;
  margin: 30px 0;
}
.adbox span {
  font-family: 'Space Mono', monospace; font-size: .66rem;
  text-transform: uppercase; letter-spacing: .1em; color: var(--navy2); opacity: .55;
}
.adwrap { margin: 30px 0; }

/* ---------- FAQ / prose ---------- */
.faq { margin-top: 40px; max-width: 760px; }
.faq details {
  background: var(--panel);
  border: 1.5px solid var(--line);
  border-radius: 8px;
  padding: 12px 16px; margin-bottom: 8px;
}
.faq summary { cursor: pointer; font-weight: 700; font-size: .94rem; }
.faq details p { margin-top: 8px; color: var(--navy2); font-size: .92rem; }

.prose { max-width: 720px; }
.prose p { margin: 12px 0; }
.prose ul, .prose ol { margin: 12px 0 12px 22px; }
.prose a { color: var(--teal); }
.prose h2 { margin-top: 30px; }

.related { margin-top: 40px; }

/* answer sentence under a programmatic result */
.answer-line { font-size: 1.05rem; margin-top: 16px; max-width: 66ch; }
.answer-line strong { color: var(--orange); font-family: 'Space Mono', monospace; }

/* quick-links table for programmatic pages */
.quicklinks { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 8px; margin-top: 14px; }
.quicklinks a {
  font-family: 'Space Mono', monospace; font-size: .8rem;
  color: var(--navy); text-decoration: none;
  background: var(--panel); border: 1.5px solid var(--line); border-radius: 7px;
  padding: 8px 12px;
}
.quicklinks a:hover { border-color: var(--orange); color: var(--orange); }

/* messages */
.msg-err { color: var(--err); font-weight: 600; font-size: .9rem; }
.msg-ok { color: var(--ok); font-weight: 600; font-size: .9rem; }
.hint { font-size: .82rem; color: var(--navy2); }

/* ---------- footer ---------- */
.foot { background: var(--navy); color: #C7D8E4; margin-top: 40px; }
.foot .brand { color: #fff; }
.foot .brand__mark { background: var(--navy); border-color: #C7D8E4; }
.foot__grid { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; padding: 34px 20px 20px; }
.foot__note { font-size: .84rem; max-width: 40ch; margin-top: 10px; color: #9DB8CB; }
.foot nav { display: flex; gap: 18px; flex-wrap: wrap; align-items: center; }
.foot nav a { color: #C7D8E4; text-decoration: none; font-size: .88rem; font-weight: 600; }
.foot nav a:hover { color: #FFB38A; }
.foot__legal {
  padding: 0 20px 26px;
  font-family: 'Space Mono', monospace; font-size: .7rem; color: #7E9BB1;
}

/* ---------- responsive ---------- */
@media (max-width: 640px) {
  .nav__links { display: none; }
  .phead { padding-top: 28px; }
  .calc { padding: 18px; }
  .row .field { min-width: 120px; }
}

/* consent notice */
#consentbar {
  position: fixed; left: 12px; right: 12px; bottom: 12px; z-index: 200;
  display: flex; gap: 14px; align-items: center; justify-content: space-between;
  max-width: 680px; margin: 0 auto;
  background: var(--navy); color: #EAF2F8;
  border-radius: 10px; padding: 12px 16px;
  font-size: .85rem; box-shadow: 0 4px 14px rgba(19,41,61,.35);
}
#consentbar a { color: #FFB38A; }
#consentbar button {
  font: inherit; font-weight: 700; cursor: pointer;
  background: var(--orange); color: #fff; border: none; border-radius: 7px; padding: 7px 18px;
}

/* accessibility: visible keyboard focus + skip link */
:focus-visible { outline: 3px solid var(--teal); outline-offset: 2px; }
.skiplink {
  position: absolute; left: -9999px; top: 8px; z-index: 300;
  background: var(--navy); color: #EAF2F8; padding: 8px 16px; border-radius: 8px;
}
.skiplink:focus { left: 8px; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }