/* ============================================================
   Farled — chart-sheet design system
   Palette: daylight nautical chart. Deep water is white; shallows
   are blue; the ink is navy. Buoys mark the channel: starboard
   green (open source), port red (collisions), gold (chartered
   deep water = Cloud).
   Type: Newsreader (engraved water-label display) ·
         Instrument Sans (body) · Spline Sans Mono (soundings/code)
   ============================================================ */

:root {
  --deepwater: #FCFDFE;
  --shallow:   #DEEBF3;
  --shoal:     #BFD9E7;
  --ink:       #12303F;
  --ink-soft:  #47656F;
  --starboard: #0E7C4A;
  --port:      #C7401F;
  --gold:      #B8862B;
  --gold-soft: #F3E7CB;

  --display: "Newsreader", Georgia, serif;
  --body: "Instrument Sans", -apple-system, sans-serif;
  --mono: "Spline Sans Mono", ui-monospace, monospace;

  --sheet-pad: clamp(1.25rem, 4vw, 3.5rem);
  --measure: 62ch;
}

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

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

body {
  font-family: var(--body);
  color: var(--ink);
  background: var(--shallow);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

/* ---- the chart sheet: neatline frame with graduation ticks ---- */
.sheet {
  max-width: 1200px;
  margin: clamp(0.75rem, 2.5vw, 2rem) auto;
  background:
    repeating-linear-gradient(90deg, var(--ink) 0 1px, transparent 1px 40px) top / 100% 7px no-repeat,
    repeating-linear-gradient(90deg, var(--ink) 0 1px, transparent 1px 40px) bottom / 100% 7px no-repeat,
    repeating-linear-gradient(0deg, var(--ink) 0 1px, transparent 1px 40px) left / 7px 100% no-repeat,
    repeating-linear-gradient(0deg, var(--ink) 0 1px, transparent 1px 40px) right / 7px 100% no-repeat,
    var(--deepwater);
  border: 2px solid var(--ink);
  outline: 1px solid var(--ink);
  outline-offset: 5px;
  padding: 0 var(--sheet-pad);
}

section { padding: clamp(3rem, 7vw, 5.5rem) 0; border-bottom: 1px solid var(--shoal); }
section:last-of-type { border-bottom: 0; }

/* motion: sections drift in */
.motion section { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.motion section.in { opacity: 1; transform: none; }

/* ---- masthead ---- */
.masthead {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.1rem 0; border-bottom: 1px solid var(--shoal);
  gap: 1rem; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: .6rem; }
.brand-mark { width: 30px; height: 30px; color: var(--ink); }
.brand-name { font-family: var(--display); font-size: 1.45rem; font-weight: 500; letter-spacing: .01em; }
.topnav { display: flex; gap: 1.4rem; align-items: center; font-size: .95rem; }
.topnav a { color: var(--ink-soft); text-decoration: none; }
.topnav a:hover { color: var(--ink); }
.nav-cta {
  color: var(--deepwater) !important; background: var(--ink);
  padding: .45rem .9rem; border-radius: 2px;
}
.nav-cta:hover { background: var(--port); }

/* ---- hero ---- */
.hero { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: clamp(1.5rem, 4vw, 3.5rem); align-items: center; }
.etym { font-size: .95rem; color: var(--ink-soft); margin-bottom: 1.4rem; max-width: var(--measure); }
.etym-word { font-family: var(--display); font-style: italic; font-size: 1.15rem; color: var(--ink); }
.etym-phon { font-family: var(--mono); font-size: .8rem; }
h1 {
  font-family: var(--display); font-weight: 500;
  font-size: clamp(2.1rem, 4.6vw, 3.4rem);
  line-height: 1.08; letter-spacing: -0.015em; margin-bottom: 1.1rem;
}
h1 em, h2 em { font-style: italic; font-weight: 400; }
.lede { font-size: 1.12rem; color: var(--ink-soft); max-width: var(--measure); margin-bottom: 1.6rem; }
.hero-actions { display: flex; gap: .8rem; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: .7rem 1.25rem; border-radius: 2px;
  text-decoration: none; font-weight: 600; font-size: .98rem;
  border: 1.5px solid var(--ink);
}
.btn-primary { background: var(--ink); color: var(--deepwater); }
.btn-primary:hover { background: var(--port); border-color: var(--port); }
.btn-ghost { color: var(--ink); background: transparent; }
.btn-ghost:hover { background: var(--shallow); }
.btn:focus-visible, a:focus-visible { outline: 3px solid var(--gold); outline-offset: 2px; }
.hero-footnote { margin-top: 1rem; font-size: .88rem; color: var(--ink-soft); }

/* ---- the chart figure ---- */
.chart { margin: 0; }
.chart svg { width: 100%; height: auto; display: block; background: var(--deepwater); border: 1px solid var(--shoal); }
.chart figcaption { font-size: .85rem; color: var(--ink-soft); padding-top: .6rem; font-style: italic; font-family: var(--display); }

.snd { font-family: var(--mono); font-size: 10px; fill: var(--shoal); }
.contour { fill: none; stroke: var(--shoal); stroke-width: 1.2; }
.contour.c2 { stroke-dasharray: 2 4; }
.waterlabel { font-family: var(--display); font-style: italic; font-size: 15px; letter-spacing: .45em; fill: var(--ink-soft); }
.lane { fill: none; stroke-width: 2; }
.lane-solid { stroke: var(--shoal); stroke-width: 2.5; }
.lane-a { stroke: var(--ink); stroke-dasharray: 7 5; }
.lane-b { stroke: var(--ink); stroke-dasharray: 7 5; }
.lane-safe { stroke: var(--starboard); stroke-dasharray: 7 5; }
.motion .lane-a, .motion .lane-b { stroke-dashoffset: 400; stroke-dasharray: 400; animation: draw 1.6s ease-out forwards .3s; }
.motion .lane-safe { stroke-dashoffset: 300; stroke-dasharray: 300; animation: draw 1.4s ease-out forwards 1.7s; }
@keyframes draw { to { stroke-dashoffset: 0; stroke-dasharray: 7 5; } }
.lanelabel { font-family: var(--mono); font-size: 11.5px; fill: var(--ink-soft); }
.lanelabel.ls { fill: var(--starboard); }

.buoy circle { fill: var(--deepwater); stroke-width: 2.5; }
.buoy path { stroke-width: 2; }
.buoy-green circle, .buoy-green path { stroke: var(--starboard); }
.buoy-red circle, .buoy-red path { stroke: var(--port); }

.collision .dot { fill: var(--port); }
.collision .cross { stroke: var(--port); stroke-width: 2.5; }
.collision .ping { fill: none; stroke: var(--port); stroke-width: 1.5; opacity: .55; }
.motion .collision .ping { animation: ping 2.6s ease-out infinite 2s; transform-origin: 345px 225px; }
@keyframes ping { 0% { transform: scale(.35); opacity: .8; } 70% { transform: scale(1.5); opacity: 0; } 100% { opacity: 0; } }

.callout rect { fill: var(--deepwater); stroke: var(--ink); stroke-width: 1.2; }
.callout-line { stroke: var(--ink); stroke-width: 1; }
.co-title { font-family: var(--mono); font-size: 12px; font-weight: 500; fill: var(--port); letter-spacing: .08em; }
.co-body { font-family: var(--mono); font-size: 12px; fill: var(--ink); }
.co-note { font-family: var(--mono); font-size: 10px; fill: var(--ink-soft); }

.rose circle { fill: none; stroke: var(--shoal); stroke-width: 1.2; }
.rose path { fill: var(--shoal); }
.rose .rose-n { fill: var(--ink); }
.rose text { font-family: var(--mono); font-size: 10px; fill: var(--ink); }

/* ---- chart-note section labels ---- */
.note-label {
  font-family: var(--mono); font-size: .78rem; letter-spacing: .18em;
  color: var(--ink-soft); margin-bottom: 1.4rem;
}
.note-label::before { content: "◆ "; color: var(--gold); }

h2 { font-family: var(--display); font-weight: 500; font-size: clamp(1.6rem, 3.2vw, 2.3rem); line-height: 1.15; letter-spacing: -0.01em; margin-bottom: 1rem; }
h3 { font-size: 1.02rem; font-weight: 600; margin-bottom: .4rem; }
section p { max-width: var(--measure); }

/* ---- problem strip ---- */
.cols3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2rem; margin-top: 2rem; }
.cols3 p { color: var(--ink-soft); font-size: .98rem; }

/* ---- two motions ---- */
.two-motions { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 5vw, 4rem); }
.two-motions .note-label { grid-column: 1 / -1; margin-bottom: 0; }
.feature-list { list-style: none; padding: 0; margin-top: 1.2rem; }
.feature-list li {
  padding: .7rem 0 .7rem 1.4rem; border-bottom: 1px dashed var(--shoal);
  position: relative; color: var(--ink-soft); font-size: .98rem;
}
.feature-list li::before {
  content: ""; position: absolute; left: 0; top: 1.15rem;
  width: 8px; height: 8px; border-radius: 50%;
  border: 2px solid var(--starboard); background: var(--deepwater);
}
#inbound .feature-list li::before { border-color: var(--gold); }
.feature-list strong { color: var(--ink); }

/* ---- terminal proof ---- */
.proof-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.proof-copy p { color: var(--ink-soft); margin-bottom: 1rem; }
.terminal { border: 1.5px solid var(--ink); border-radius: 4px; overflow: hidden; background: var(--ink); color: #DCEAF2; box-shadow: 6px 6px 0 var(--shoal); }
.term-bar { display: flex; align-items: center; gap: 6px; padding: .55rem .8rem; background: #0B2331; }
.term-bar span { width: 10px; height: 10px; border-radius: 50%; background: #35576A; }
.term-bar em { font-family: var(--mono); font-style: normal; font-size: .8rem; color: #8FB4C7; margin-left: .5rem; }
.terminal pre { padding: 1.1rem 1.2rem; overflow-x: auto; }
.terminal code { font-family: var(--mono); font-size: .82rem; line-height: 1.65; }
.terminal b { font-weight: 500; color: #fff; }
.terminal .warn { color: #FF9B7A; }
.terminal .ok { color: #7ADB9F; }

.mono, .mono-list { font-family: var(--mono); font-size: .92em; }

/* ---- open core ---- */
.oc-lede { color: var(--ink-soft); font-size: 1.08rem; }
.oc-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.6rem; margin-top: 2rem; }
.oc-card { border: 1.5px solid var(--ink); border-radius: 3px; padding: 1.6rem 1.6rem 1.2rem; background: var(--deepwater); min-width: 0; }
.oc-oss { border-color: var(--starboard); }
.oc-cloud { border-color: var(--gold); background: linear-gradient(var(--gold-soft), var(--deepwater) 30%); }
.oc-tag { font-family: var(--mono); font-size: .78rem; letter-spacing: .1em; color: var(--ink-soft); margin-bottom: .8rem; display: flex; align-items: center; gap: .5rem; }
.buoy-dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; border: 2.5px solid; background: var(--deepwater); }
.buoy-dot.green { border-color: var(--starboard); }
.buoy-dot.gold { border-color: var(--gold); }
.oc-card h3 { font-family: var(--display); font-size: 1.5rem; font-weight: 500; margin-bottom: .8rem; }
.oc-card ul { list-style: none; padding: 0; }
.oc-card li { padding: .5rem 0; border-bottom: 1px dashed var(--shoal); font-size: .95rem; color: var(--ink-soft); }
.oc-card li:last-child { border-bottom: 0; }
.oc-cta { margin-top: 1rem; }
.oc-cta a { color: var(--ink); font-weight: 600; text-decoration: none; border-bottom: 2px solid var(--starboard); }
.oc-cloud .oc-cta a { border-bottom-color: var(--gold); }
.oc-cta a:hover { color: var(--port); }

/* ---- privacy caution ---- */
.caution { border: 2px solid var(--port); border-radius: 3px; padding: 1.8rem clamp(1.2rem, 3vw, 2.4rem); background: var(--deepwater); }
.caution-label { font-family: var(--mono); font-size: .75rem; letter-spacing: .14em; color: var(--port); margin-bottom: 1rem; }
.cols2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2rem; margin-top: 1.4rem; }
.cols2 p { color: var(--ink-soft); }
.mono-list { color: var(--ink) !important; line-height: 2; }
.caution-foot { margin-top: 1.4rem; padding-top: 1.2rem; border-top: 1px dashed var(--shoal); color: var(--ink-soft); font-size: .95rem; }

/* ---- getting started ---- */
.gs-lede { color: var(--ink-soft); font-size: 1.05rem; }
.cmd { background: var(--ink); color: #DCEAF2; border-radius: 3px; padding: .9rem 1rem; overflow-x: auto; margin-top: .6rem; min-width: 0; max-width: 100%; }
.cmd code { font-family: var(--mono); font-size: .82rem; line-height: 1.6; }
.cmd-wide { margin-top: 1rem; max-width: 46rem; }
/* Full-width rows: copy left, commands get the room they deserve right. */
.paths { display: grid; grid-template-columns: 1fr; gap: 1.4rem; margin-top: 2rem; }
.path {
  border: 1.5px solid var(--shoal); border-radius: 3px; padding: 1.5rem;
  background: var(--deepwater); min-width: 0;
  display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 3fr);
  gap: 1.5rem 2rem; align-items: start;
}
.path:last-child { border-color: var(--gold); }
.path-info, .path-how { min-width: 0; }
.path-how .cmd { margin-top: 0; }
.path-tag { font-family: var(--mono); font-size: .74rem; letter-spacing: .1em; color: var(--ink-soft); margin-bottom: .7rem; display: flex; align-items: center; gap: .5rem; }
.path h3 { font-family: var(--display); font-weight: 500; font-size: 1.25rem; margin-bottom: .5rem; }
.path p { font-size: .93rem; color: var(--ink-soft); }
.path-caution { margin-top: .9rem; border-left: 3px solid var(--port); padding: .6rem .8rem; background: #FBEFEA; font-size: .88rem; color: var(--ink); border-radius: 0 2px 2px 0; }
.path-note { margin-top: .8rem; font-size: .88rem; }
.agents-any { margin-top: 2.4rem; border-top: 1px dashed var(--shoal); padding-top: 1.8rem; }
.agents-any h3 { font-family: var(--display); font-weight: 500; font-size: 1.35rem; }
.agents-any p { color: var(--ink-soft); margin-top: .5rem; }
.agents-any a { color: var(--ink); }
.gs-foot { margin-top: 2rem; color: var(--ink-soft); }
.gs-foot a { color: var(--ink); font-weight: 600; }
@media (max-width: 900px) { .path { grid-template-columns: 1fr; gap: 1rem; } }

/* ---- colophon ---- */
.colophon {
  display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; flex-wrap: wrap;
  padding: 1.4rem 0 1.6rem; border-top: 1.5px solid var(--ink); font-size: .9rem; color: var(--ink-soft);
}
.foot-sep { margin: 0 .4rem; }
.foot-meta { font-size: .78rem; }
.colophon a { color: var(--ink-soft); }
.colophon a:hover { color: var(--ink); }
.foot-company { width: 100%; font-size: .82rem; padding-top: .4rem; }

/* ---- responsive ---- */
@media (max-width: 900px) {
  .hero, .proof-grid, .two-motions, .oc-grid { grid-template-columns: 1fr; }
  .cols3, .gs-grid { grid-template-columns: 1fr; gap: 1.4rem; }
  .cols2 { grid-template-columns: 1fr; }
  .two-motions .motion + .motion { border-top: 1px dashed var(--shoal); padding-top: 2rem; }
}
@media (max-width: 560px) {
  .topnav a:not(.nav-cta) { display: none; }
  .sheet { outline: none; }
}