/* Layout: a VFR chart sheet. Paper ground with a faint graticule, navy print,
   magenta for the things that matter, aeronautical blue for vectors. */
:root {
  --paper: #f2efe6;
  --paper-2: #e9e4d6;
  --card: #fbf9f3;
  --ink: #0f2a4a;
  --ink-soft: #4a5c72;
  --magenta: #b0287a;
  --blue: #2b6cb0;
  --rule: rgba(15, 42, 74, 0.14);
  --grid: rgba(43, 108, 176, 0.09);
  --shadow: 0 10px 30px -18px rgba(15, 42, 74, 0.45);
  --display: "Archivo", "Arial Narrow", system-ui, sans-serif;
  --body: "Source Sans 3", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0c1622;
    --paper-2: #122030;
    --card: #142436;
    --ink: #e7ecf2;
    --ink-soft: #9fb0c3;
    --magenta: #e45aa9;
    --blue: #6ea8ea;
    --rule: rgba(231, 236, 242, 0.14);
    --grid: rgba(110, 168, 234, 0.08);
    --shadow: 0 10px 30px -18px rgba(0, 0, 0, 0.8);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.6 var(--body);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
img, canvas { max-width: 100%; }
:focus-visible { outline: 2px solid var(--magenta); outline-offset: 3px; border-radius: 4px; }

.wrap {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding-left: max(20px, env(safe-area-inset-left, 0px));
  padding-right: max(20px, env(safe-area-inset-right, 0px));
}

.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--paper); padding: 8px 12px; border-radius: 6px; z-index: 50; }
.skip:focus { left: 12px; }

.eyebrow {
  font: 500 12px/1 var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--magenta);
  margin: 0 0 14px;
}

h1, h2, h3 { font-family: var(--display); line-height: 1.08; margin: 0; text-wrap: balance; letter-spacing: -0.01em; }
h1 { font-size: clamp(36px, 5.2vw, 62px); font-weight: 800; }
h2 { font-size: clamp(28px, 3.4vw, 40px); font-weight: 800; }
h3 { font-size: 21px; font-weight: 700; }

/* ---------- navigation ---------- */

.nav {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 20;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(1.2) blur(10px);
  border-bottom: 1px solid var(--rule);
}
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); background: var(--paper); z-index: 21; }

.nav-row { display: flex; align-items: center; gap: 24px; min-height: 68px; }

.logo { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font: 700 19px/1 var(--display); color: var(--ink); }
.logo svg { width: 32px; height: 32px; color: var(--ink); }
.logo b { color: var(--magenta); font-weight: 800; }

.menu { margin-left: auto; }
.menu > ul { list-style: none; display: flex; align-items: center; gap: 6px; margin: 0; padding: 0; }
.menu > ul > li > a,
.dd-toggle {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 14px;
  border-radius: 8px;
  border: 0;
  background: none;
  color: var(--ink);
  font: 600 16px/1 var(--body);
  text-decoration: none;
  cursor: pointer;
}
.menu > ul > li > a:hover, .dd-toggle:hover, .dd-toggle[aria-expanded="true"] { background: var(--paper-2); }
.dd-toggle svg { width: 12px; height: 12px; transition: transform 0.15s; }
.dd-toggle[aria-expanded="true"] svg { transform: rotate(180deg); }

.has-dropdown { position: relative; }
.dropdown {
  list-style: none;
  margin: 0;
  padding: 8px;
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  width: 340px;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 12px;
  box-shadow: var(--shadow);
  display: none;
}
.has-dropdown.open .dropdown { display: block; }
@media (hover: hover) and (min-width: 861px) {
  .has-dropdown:hover .dropdown { display: block; }
  .has-dropdown::after { content: ""; position: absolute; left: 0; right: 0; top: 100%; height: 10px; }
}
.dropdown a, .dd-soon {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 12px;
  border-radius: 8px;
  text-decoration: none;
}
.dropdown a:hover, .dropdown a:focus-visible { background: var(--paper-2); }
.dd-soon { opacity: 0.55; cursor: default; }
.dd-icon { flex: none; width: 38px; height: 38px; display: grid; place-items: center; border-radius: 9px; background: var(--paper-2); color: var(--ink); }
.dd-icon svg { width: 26px; height: 26px; }
.dd-title { display: block; font: 700 15px/1.25 var(--display); }
.dd-desc { display: block; font-size: 14px; color: var(--ink-soft); line-height: 1.35; margin-top: 2px; }

.lang { display: inline-flex; margin-left: 8px; border: 1px solid var(--rule); border-radius: 8px; overflow: hidden; }
.lang button { border: 0; background: none; color: var(--ink-soft); font: 500 13px/1 var(--mono); padding: 9px 10px; cursor: pointer; }
.lang button.active { background: var(--ink); color: var(--paper); }

.menu-toggle { display: none; margin-left: auto; width: 44px; height: 44px; border: 1px solid var(--rule); border-radius: 10px; background: none; color: var(--ink); cursor: pointer; }
.bars, .bars::before, .bars::after { display: block; width: 18px; height: 2px; background: currentColor; border-radius: 2px; position: relative; margin: 0 auto; transition: transform 0.2s; }
.bars::before, .bars::after { content: ""; position: absolute; left: 0; }
.bars::before { top: -6px; }
.bars::after { top: 6px; }
.menu-toggle[aria-expanded="true"] .bars { background: transparent; }
.menu-toggle[aria-expanded="true"] .bars::before { transform: translateY(6px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] .bars::after { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 860px) {
  .menu-toggle { display: block; }
  .menu { display: none; position: absolute; left: 0; right: 0; top: 100%; background: var(--paper); border-bottom: 1px solid var(--rule); padding: 8px max(20px, env(safe-area-inset-right, 0px)) 16px max(20px, env(safe-area-inset-left, 0px)); }
  .menu.open { display: block; }
  .menu > ul { flex-direction: column; align-items: stretch; gap: 2px; }
  .menu > ul > li > a, .dd-toggle { width: 100%; justify-content: space-between; padding: 14px 12px; }
  .dropdown { position: static; width: auto; box-shadow: none; margin: 4px 0 8px; }
  .lang { margin: 10px 0 0; align-self: flex-start; }
}

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

.hero {
  position: relative;
  padding-block: clamp(48px, 8vw, 96px);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 64px 64px;
  background-position: -1px -1px;
  border-bottom: 1px solid var(--rule);
}
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 64px); align-items: center; }
.hero-copy { min-width: 0; }
.lede { font-size: clamp(18px, 1.6vw, 20px); color: var(--ink-soft); max-width: 34em; margin: 22px 0 30px; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 0 22px;
  border-radius: 10px;
  font: 700 16px/1 var(--display);
  text-decoration: none;
  border: 1.5px solid var(--ink);
  transition: transform 0.12s, background 0.12s;
}
.btn.primary { background: var(--ink); color: var(--paper); }
.btn.primary:hover { background: var(--magenta); border-color: var(--magenta); }
.btn.ghost { color: var(--ink); }
.btn.ghost:hover { background: var(--paper-2); }
.btn:active { transform: translateY(1px); }

.hero-fig { margin: 0; min-width: 0; background: var(--card); border: 1px solid var(--rule); border-radius: 16px; box-shadow: var(--shadow); padding: 14px; }
.hero-fig canvas { display: block; width: 100%; height: auto; aspect-ratio: 560 / 460; }
.readout { display: flex; flex-wrap: wrap; gap: 8px; padding: 12px 4px 2px; font: 500 13px/1 var(--mono); font-variant-numeric: tabular-nums; }
.readout > span { padding: 7px 9px; border-radius: 6px; background: var(--paper-2); }
.readout .k { color: var(--ink-soft); margin-right: 6px; }
.readout .w { color: var(--magenta); }
.readout .h { color: var(--blue); }

@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
}

/* ---------- tools ---------- */

.tools { padding-block: clamp(56px, 8vw, 96px); }
.section-head { max-width: 46em; margin-bottom: 36px; }
.section-head p:last-child { color: var(--ink-soft); margin: 16px 0 0; font-size: 18px; }

.faces { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.face {
  position: relative;
  display: flex; flex-direction: column; gap: 10px;
  padding: 26px 24px 22px;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 14px;
  text-decoration: none;
  transition: border-color 0.15s, transform 0.15s;
}
.face:hover { border-color: var(--magenta); transform: translateY(-2px); }
.face p { margin: 0; color: var(--ink-soft); font-size: 16px; flex: 1; }
.face-tag { font: 500 12px/1 var(--mono); color: var(--magenta); letter-spacing: 0.1em; }
.face-link { font: 700 15px/1 var(--display); color: var(--blue); margin-top: 6px; }
@media (prefers-reduced-motion: reduce) { .face, .btn { transition: none; } .face:hover { transform: none; } }

.specs { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin: 30px 0 0; border-top: 1px solid var(--rule); }
.specs div { padding: 18px 16px 4px 0; }
.specs dt { font: 500 12px/1 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-soft); }
.specs dd { margin: 8px 0 0; font: 700 18px/1.3 var(--display); font-variant-numeric: tabular-nums; }

@media (max-width: 860px) {
  .faces { grid-template-columns: 1fr; }
  .specs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ---------- about & footer ---------- */

.about { padding-block: clamp(48px, 7vw, 88px); background: var(--paper-2); border-top: 1px solid var(--rule); }
.about-grid { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); gap: 32px; }
.about p { margin: 0 0 14px; max-width: 38em; }
.about p:last-child { color: var(--ink-soft); font-size: 16px; }
@media (max-width: 860px) { .about-grid { grid-template-columns: 1fr; gap: 16px; } }

.foot { border-top: 1px solid var(--rule); padding-block: 26px calc(26px + env(safe-area-inset-bottom, 0px)); font-size: 14px; }
.foot-row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px 24px; }
.muted { color: var(--ink-soft); }