/* paperflylabs.com — colors from DESIGN.md (sea, signal yellow, ink). */
:root {
  --sea: #1f4fa0; --sea-deep: #173d7d; --yellow: #ffd23f; --ink: #0f1e3a; --ink-2: #3b4a66;
  --paper: #ffffff; --paper-2: #f3f6fb; --line: #dde3ee; --link: #1f4fa0;
  --display: "M PLUS Rounded 1c", system-ui, sans-serif;
  --body: -apple-system, system-ui, "Apple SD Gothic Neo", "Hiragino Sans", "Noto Sans KR", "Noto Sans JP", Roboto, sans-serif;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --ink: #f2f5fb; --ink-2: #b7c2d8; --paper: #0b1526; --paper-2: #13213a; --line: #24345a; --link: #ffd23f; --sea: #0d2350; --sea-deep: #0a1b3e; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font: 16px/1.7 var(--body); color: var(--ink); background: var(--paper); word-break: keep-all; overflow-wrap: anywhere; }
a { color: var(--link); }
a:focus-visible { outline: 3px solid var(--yellow); outline-offset: 2px; border-radius: 4px; }

.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  max-width: 1040px; margin: 0 auto; padding: 18px 20px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: inherit;
  font: 800 22px/1 var(--display); letter-spacing: -0.01em; }
.brand .plane { width: 34px; height: 28px; }
.langs { display: flex; gap: 4px; font-size: 14px; }
.langs a, .langs span { padding: 6px 10px; border-radius: 999px; text-decoration: none; color: inherit; }
.langs span { background: rgba(255, 210, 63, 0.9); color: #0f1e3a; font-weight: 700; }
.langs a:hover { background: rgba(127, 140, 170, 0.18); }

/* Landing: the evening-forecast sea. */
body.sky { background: var(--sea); color: #fff; }
body.sky a { color: #fff; }
body.sky .brand .plane path:first-child { fill: #fff; }
.landing { max-width: 1040px; margin: 0 auto; padding: 24px 20px 64px; }
.hero { padding: 40px 0 8px; }
.eyebrow { margin: 0 0 12px; font-weight: 700; color: var(--yellow); letter-spacing: 0.02em; }
.hero h1 { margin: 0; font: 800 clamp(34px, 7vw, 60px)/1.18 var(--display); letter-spacing: -0.015em; }
.lead { max-width: 620px; margin: 20px 0 0; font-size: 18px; color: #dfe7f7; }
.status { display: inline-flex; align-items: center; gap: 10px; margin: 28px 0 0; padding: 10px 18px;
  background: #fff; color: #0f1e3a; border-radius: 999px; font-weight: 700; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: #d8412a; box-shadow: 0 0 0 4px rgba(216, 65, 42, 0.18); }
.route { display: block; width: 100%; max-width: 640px; height: auto; margin: 36px 0 8px; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin-top: 24px; }
.features article { background: #fff; color: #0f1e3a; border-radius: 18px; padding: 22px 22px 18px; }
.features h2 { margin: 0 0 8px; font: 800 20px/1.3 var(--display); }
.features p { margin: 0; color: #3b4a66; }

/* Documents: plain paper. */
.doc { max-width: 760px; margin: 0 auto; padding: 8px 20px 56px; }
.doc h1 { font: 800 clamp(28px, 5vw, 36px)/1.25 var(--display); margin: 12px 0 20px; letter-spacing: -0.01em; }
.doc h2 { font-size: 20px; line-height: 1.4; margin: 36px 0 10px; padding-top: 8px; border-top: 1px solid var(--line); }
.doc h3 { font-size: 17px; margin: 24px 0 8px; }
.doc em { color: var(--ink-2); }
.doc table { display: block; overflow-x: auto; border-collapse: collapse; width: 100%; font-size: 14.5px; margin: 12px 0; }
.doc th, .doc td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; min-width: 110px; }
.doc th { background: var(--paper-2); }
.doc li { margin: 4px 0; }
.crumbs { margin: 8px 0 0; font-size: 14px; }
.meta { margin-top: 40px; color: var(--ink-2); font-size: 14px; }
.doclist { padding-left: 20px; font-size: 18px; }

.foot { max-width: 1040px; margin: 0 auto; padding: 28px 20px 40px; font-size: 13.5px; color: var(--ink-2); border-top: 1px solid var(--line); }
body.sky .foot { color: #c9d6ef; border-top-color: rgba(255, 255, 255, 0.2); }
.foot p { margin: 4px 0; }
.foot-links { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-bottom: 14px; }
.adult { font-weight: 700; }

@media (max-width: 480px) {
  .hero { padding-top: 16px; }
  .lead { font-size: 16.5px; }
}