/* wflies.com — one hand-written stylesheet, no build step.
   Palette, type and the plane mark are the app's own (brand/README.md,
   ui/src/index.css): the evening-sky ground, the plane blues, Archivo for
   display, Onest for text, JetBrains Mono for code. Fonts are self-hosted. */

@font-face {
  font-family: 'Archivo';
  src: url('/assets/fonts/archivo-display.woff2') format('woff2');
  font-weight: 700 800;
  font-stretch: 112% 118%;
  font-display: swap;
}
@font-face {
  font-family: 'Onest';
  src: url('/assets/fonts/onest.woff2') format('woff2');
  font-weight: 400 700;
  font-display: swap;
}
@font-face {
  font-family: 'JetBrains Mono';
  src: url('/assets/fonts/jetbrains-mono.woff2') format('woff2');
  font-weight: 400 700;
  font-display: swap;
}

:root {
  color-scheme: dark;
  --sky-0: #070a14;
  --sky-1: #0c1226;
  --tile: #1e2a4a;
  --panel: #101831;
  --panel-2: #16203f;
  --panel-3: #1c2850;
  --ink: #f5f7fb;
  --ink-2: #a9b4d0;
  --ink-3: #6f7b9c;
  --blue: #5b8cff;
  --blue-lit: #93b4ff;
  --blue-shade: #4a7bf0;
  --blue-btn: #416cd2;
  --you: #ffb547;
  --bot: #4fe0b5;
  --bad: #ff6b7a;
  --line: rgba(147, 180, 255, 0.12);
  --line-2: rgba(147, 180, 255, 0.22);
  --radius: 14px;
  --display: 'Archivo', 'Onest', system-ui, sans-serif;
  --sans: 'Onest', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 84px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  color: var(--ink);
  background-color: var(--sky-0);
  background-image:
    radial-gradient(1100px 520px at 30% -12%, rgba(91, 140, 255, 0.2), transparent 70%),
    linear-gradient(160deg, var(--tile) -30%, var(--sky-1) 30%, var(--sky-0) 100%);
  background-attachment: fixed;
  font: 16px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--blue-lit); text-decoration-color: rgba(147, 180, 255, 0.4); text-underline-offset: 3px; }
a:hover { color: var(--ink); text-decoration-color: currentColor; }
:focus-visible { outline: 2px solid var(--blue-lit); outline-offset: 3px; border-radius: 6px; }

h1, h2, h3 { font-family: var(--display); font-stretch: 115%; font-weight: 800; letter-spacing: -0.01em; line-height: 1.15; margin: 0 0 0.6em; }
h1 { font-size: clamp(2.2rem, 5.4vw, 3.9rem); }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.3rem); }
h3 { font-size: 1.15rem; font-weight: 700; }
h4 { font-size: 1rem; margin: 1.6em 0 0.4em; }
p { margin: 0 0 1em; }
.dim { color: var(--ink-2); }

code, kbd, pre { font-family: var(--mono); font-size: 0.88em; }
:not(pre) > code {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.1em 0.38em;
  overflow-wrap: break-word;
}
pre {
  background: rgba(7, 10, 20, 0.75);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 16px;
  overflow-x: auto;
  line-height: 1.55;
  margin: 0 0 1.2em;
  color: #dde4f5;
}
pre .c { color: var(--ink-3); }
pre .p { color: var(--bot); user-select: none; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* --- top bar ------------------------------------------------------------ */
.top {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  background: rgba(7, 10, 20, 0.72);
  border-bottom: 1px solid var(--line);
}
.top .wrap { display: flex; align-items: center; gap: 20px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-family: var(--display); font-stretch: 115%; font-weight: 800; font-size: 1.15rem; }
.brand img { height: 22px; width: auto; }
.nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav a { color: var(--ink-2); text-decoration: none; padding: 8px 12px; border-radius: 8px; font-weight: 500; font-size: 0.95rem; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); background: var(--panel-2); }
.nav .ig { display: inline-flex; padding: 8px; }
.nav .ig svg { width: 20px; height: 20px; }
@media (max-width: 640px) {
  .nav a.opt { display: none; }
}

/* --- buttons ------------------------------------------------------------ */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 18px; border-radius: 10px;
  font-weight: 600; text-decoration: none; border: 1px solid transparent;
  transition: background 0.15s, border-color 0.15s;
}
.btn.primary { background: var(--blue-btn); color: #fff; }
.btn.primary:hover { background: var(--blue-shade); color: #fff; }
.btn.ghost { border-color: var(--line-2); color: var(--ink); background: rgba(22, 32, 63, 0.5); }
.btn.ghost:hover { border-color: var(--blue-lit); }

/* --- hero --------------------------------------------------------------- */
.hero { padding: 84px 0 56px; text-align: center; }
.hero .mark { width: 92px; height: auto; margin-bottom: 26px; filter: drop-shadow(0 10px 40px rgba(91, 140, 255, 0.45)); }
.eyebrow {
  display: inline-block; font-size: 0.8rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--blue-lit); background: rgba(91, 140, 255, 0.12); border: 1px solid var(--line-2);
  padding: 4px 12px; border-radius: 999px; margin-bottom: 22px;
}
.hero h1 { max-width: 15ch; margin-left: auto; margin-right: auto; }
.hero .lede { font-size: 1.2rem; color: var(--ink-2); max-width: 46rem; margin: 0 auto 30px; }
.cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 34px; }

.oneliner {
  display: flex; align-items: center; gap: 10px;
  max-width: 760px; margin: 0 auto; text-align: left;
  background: rgba(7, 10, 20, 0.8); border: 1px solid var(--line-2); border-radius: 12px;
  padding: 6px 6px 6px 16px;
}
.oneliner code { flex: 1; min-width: 0; overflow-x: auto; white-space: nowrap; background: none; border: 0; padding: 10px 0; font-size: 0.9rem; color: #dde4f5; }
.oneliner code::before { content: '$ '; color: var(--bot); }

.copy {
  flex: none; cursor: pointer; font: 600 0.8rem var(--sans); color: var(--ink-2);
  background: var(--panel-2); border: 1px solid var(--line-2); border-radius: 8px; padding: 8px 12px;
}
.copy:hover { color: var(--ink); border-color: var(--blue-lit); }
.copy.done { color: var(--bot); border-color: var(--bot); }
.codebox { position: relative; }
.codebox .copy { position: absolute; top: 8px; right: 8px; }
.codebox pre { padding-right: 76px; }

/* --- sections ----------------------------------------------------------- */
section { padding: 64px 0; }
section.alt { background: linear-gradient(180deg, rgba(16, 24, 49, 0.55), rgba(16, 24, 49, 0.15)); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.head { max-width: 720px; margin-bottom: 36px; }
.head.center { margin-left: auto; margin-right: auto; text-align: center; }
.kicker { color: var(--blue-lit); font-weight: 600; font-size: 0.85rem; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 10px; }

.grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.card {
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  border: 1px solid var(--line); border-radius: var(--radius); padding: 22px;
}
.card h3 { display: flex; align-items: center; gap: 10px; }
.card p:last-child { margin-bottom: 0; }
.card .ico { width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center; background: rgba(91, 140, 255, 0.14); color: var(--blue-lit); flex: none; }
.card .ico svg { width: 18px; height: 18px; }

/* steps */
.steps { counter-reset: step; display: grid; gap: 16px; }
.step { display: grid; grid-template-columns: 44px 1fr; gap: 16px; align-items: start; }
.step::before {
  counter-increment: step; content: counter(step);
  width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center;
  font: 800 1.1rem var(--display); background: var(--panel-3); border: 1px solid var(--line-2); color: var(--blue-lit);
}
.step h3 { margin: 8px 0 6px; }
.step pre { margin-bottom: 0.6em; }

/* tabs */
.tabs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 18px; border-bottom: 1px solid var(--line); }
.tabs button {
  font: 600 0.95rem var(--sans); color: var(--ink-2); background: none; border: 0;
  padding: 10px 14px; border-bottom: 2px solid transparent; cursor: pointer; margin-bottom: -1px;
}
.tabs button[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--blue); }
.tabs button:hover { color: var(--ink); }
.panel[hidden] { display: none; }
.no-js .panel[hidden] { display: block; }

/* table */
table { width: 100%; border-collapse: collapse; margin: 0 0 1.4em; font-size: 0.95rem; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--ink-2); font-weight: 600; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; }
.tablewrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 12px; margin-bottom: 1.4em; background: rgba(16, 24, 49, 0.4); }
.tablewrap table { margin: 0; }
.tablewrap tr:last-child td { border-bottom: 0; }

.tag { display: inline-block; font-size: 0.75rem; font-weight: 600; padding: 2px 8px; border-radius: 999px; background: rgba(79, 224, 181, 0.12); color: var(--bot); border: 1px solid rgba(79, 224, 181, 0.3); }
.tag.you { background: rgba(255, 181, 71, 0.12); color: var(--you); border-color: rgba(255, 181, 71, 0.3); }
.tag.blue { background: rgba(91, 140, 255, 0.14); color: var(--blue-lit); border-color: var(--line-2); }

.note {
  border: 1px solid var(--line-2); border-left: 3px solid var(--blue); background: rgba(91, 140, 255, 0.08);
  border-radius: 10px; padding: 14px 16px; margin: 0 0 1.4em;
}
.note.warn { border-left-color: var(--you); background: rgba(255, 181, 71, 0.07); }
.note p:last-child { margin: 0; }

.split { display: grid; gap: 40px; grid-template-columns: 1fr 1fr; align-items: center; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }

.check { list-style: none; padding: 0; margin: 0 0 1em; }
.check li { position: relative; padding-left: 28px; margin-bottom: 8px; }
.check li::before { content: ''; position: absolute; left: 4px; top: 0.5em; width: 12px; height: 7px; border-left: 2px solid var(--bot); border-bottom: 2px solid var(--bot); transform: rotate(-45deg); }

/* board illustration */
.board { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; padding: 14px; border-radius: var(--radius); background: rgba(7, 10, 20, 0.6); border: 1px solid var(--line-2); box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45); }
.col { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 8px; min-height: 180px; }
.col h5 { margin: 2px 4px 8px; font: 600 0.72rem var(--sans); text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-3); }
.tk { background: var(--panel-2); border: 1px solid var(--line); border-radius: 8px; padding: 7px 8px; margin-bottom: 7px; font-size: 0.74rem; line-height: 1.35; }
.tk b { display: block; font: 600 0.68rem var(--mono); color: var(--ink-3); margin-bottom: 2px; }
.tk.you { border-left: 3px solid var(--you); }
.tk.bot { border-left: 3px solid var(--bot); }
.tk.cruise { border-left: 3px solid var(--blue); }
@media (max-width: 520px) { .board { grid-template-columns: repeat(2, 1fr); } }

/* --- footer ------------------------------------------------------------- */
footer { border-top: 1px solid var(--line); padding: 40px 0 56px; color: var(--ink-2); font-size: 0.92rem; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 24px 48px; justify-content: space-between; }
footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
footer h4 { margin: 0 0 10px; color: var(--ink); font-size: 0.9rem; }
footer a { color: var(--ink-2); text-decoration: none; }
footer a:hover { color: var(--ink); }
footer .fine { flex-basis: 100%; margin: 8px 0 0; font-size: 0.82rem; color: var(--ink-3); }
footer .fine a { text-decoration: underline; }
.social { display: inline-flex; align-items: center; gap: 8px; }
.social svg { width: 18px; height: 18px; }

/* --- docs layout -------------------------------------------------------- */
.docs { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 48px; padding-top: 36px; padding-bottom: 80px; }
.toc { position: sticky; top: 84px; align-self: start; max-height: calc(100vh - 100px); overflow-y: auto; padding-right: 8px; font-size: 0.92rem; }
.toc h6 { margin: 18px 0 6px; font: 700 0.72rem var(--sans); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); }
.toc h6:first-child { margin-top: 0; }
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc a { display: block; padding: 4px 10px; color: var(--ink-2); text-decoration: none; border-left: 2px solid var(--line); }
.toc a:hover { color: var(--ink); border-left-color: var(--line-2); }
.toc a.on { color: var(--ink); border-left-color: var(--blue); }
.toc-toggle { display: none; }
.doc h1 { font-size: clamp(2rem, 4vw, 2.8rem); }
.doc h2 { font-size: 1.7rem; margin-top: 2.4em; padding-top: 0.6em; border-top: 1px solid var(--line); }
.doc h2:first-of-type { margin-top: 1.2em; }
.doc h3 { margin-top: 1.8em; font-size: 1.2rem; }
.doc ul, .doc ol { padding-left: 1.3em; margin: 0 0 1.1em; }
.doc li { margin-bottom: 0.35em; }
.doc dl { margin: 0 0 1.2em; }
.doc dt { font-weight: 600; margin-top: 0.8em; }
.doc dd { margin: 0.2em 0 0 1.2em; color: var(--ink-2); }
.doc .anchor { color: var(--ink-3); text-decoration: none; margin-left: 8px; opacity: 0; font-weight: 400; }
.doc h2:hover .anchor, .doc h3:hover .anchor { opacity: 1; }
.search { width: 100%; margin-bottom: 14px; padding: 9px 12px; border-radius: 9px; border: 1px solid var(--line-2); background: var(--panel); color: var(--ink); font: 0.92rem var(--sans); }
.search::placeholder { color: var(--ink-3); }

@media (max-width: 900px) {
  .docs { grid-template-columns: 1fr; gap: 0; }
  .toc { position: static; max-height: none; margin-bottom: 20px; border: 1px solid var(--line); border-radius: 12px; padding: 12px; background: var(--panel); }
  .toc-toggle { display: block; width: 100%; text-align: left; font: 600 0.95rem var(--sans); color: var(--ink); background: none; border: 0; padding: 4px 2px; cursor: pointer; }
  .toc.closed .toc-body { display: none; }
}

/* --- small pages -------------------------------------------------------- */
.narrow { max-width: 720px; margin: 0 auto; padding: 72px 20px 96px; }
.center { text-align: center; }
.mt { margin-top: 32px; }
.mt-s { margin-top: 14px; }
.small { font-size: 0.9rem; }
.cta.left { justify-content: flex-start; }
.blurb { margin-top: 10px; max-width: 22rem; }
.mark404 { margin-bottom: 24px; opacity: 0.85; }
.narrow .lede { font-size: 1.1rem; }

/* Grid and flex children default to min-width: auto, which lets one long
   <pre> push the whole page wider than a phone. */
.step > div, .split > *, .grid > *, .docs > * { min-width: 0; }
.hero-note { display: inline-block; margin: -12px auto 32px; padding: 7px 16px; border-radius: 999px; font-size: 0.9rem; line-height: 1.5; color: var(--ink-2); background: rgba(255, 181, 71, 0.08); border: 1px solid rgba(255, 181, 71, 0.28); max-width: 100%; }
.hero-note .dot { display: inline-block; width: 7px; height: 7px; margin-right: 8px; vertical-align: 0.1em; border-radius: 50%; background: var(--you); }
@media (max-width: 560px) { .hero-note { border-radius: 14px; } }