/* kldcomms.net — field-manual styling. No webfonts, no scripts, no external requests. */

:root {
  --bg: #14130f;
  --bg-alt: #181712;
  --card: #1d1b16;
  --line: #2f2b23;
  --line-2: #4a443a;
  --ink: #ece6d6;
  --ink-2: #b4ad9b;
  --ink-3: #8a8373;
  --signal: #ff7a1a;
  --signal-2: #ffb070;
  --ok: #8fcf6b;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --max: 72rem;
  --gutter: 2rem;
  --radius: 6px;
}

/* ---------- base ---------- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 5rem; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.65 var(--sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main { flex: 1; }
a { color: var(--signal-2); text-underline-offset: 3px; }
a:hover { color: var(--signal); }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; }
img, svg { max-width: 100%; }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
@media (max-width: 640px) { :root { --gutter: 1.25rem; } body { font-size: 16px; } }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 1rem; top: 1rem; background: var(--signal); color: #000; padding: .5rem 1rem; z-index: 10; }

/* ---------- type ---------- */
h1, h2, h3 { margin: 0 0 .6em; font-weight: 700; line-height: 1.15; letter-spacing: -.01em; }
h1 { font-size: clamp(2.4rem, 5.5vw, 4rem); letter-spacing: -.025em; }
h2 { font-size: clamp(1.5rem, 2.8vw, 2.1rem); max-width: 26ch; }
h3 { font-size: 1.12rem; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }
.lede { font-size: 1.18rem; color: var(--ink-2); max-width: 42rem; }
.subtitle { font: 500 1.05rem var(--mono); color: var(--signal-2); letter-spacing: .02em; margin: -.2rem 0 1.4rem; }
.muted { color: var(--ink-3); font-size: .95rem; }

.eyebrow, .section-label, .phase, .card-num {
  font: 500 .76rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: .12em; color: var(--ink-3);
}
.eyebrow { display: flex; align-items: center; gap: .6rem; margin-bottom: 1.5rem; }
.section-label { display: block; margin-bottom: 1rem; color: var(--signal); }
.dot { flex: none; width: .55rem; height: .55rem; border-radius: 50%; background: var(--ok); animation: ping 2.4s infinite; }
@keyframes ping { 0% { box-shadow: 0 0 0 0 #8fcf6b88; } 70% { box-shadow: 0 0 0 .6rem #8fcf6b00; } 100% { box-shadow: 0 0 0 0 #8fcf6b00; } }
@media (prefers-reduced-motion: reduce) { .dot { animation: none; } }

/* ---------- masthead ---------- */
.masthead { position: sticky; top: 0; z-index: 5; background: #14130fee; backdrop-filter: blur(6px); border-bottom: 1px solid var(--line); }
.bar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; height: 4rem; }
.mark { display: inline-flex; align-items: center; gap: .6rem; color: var(--ink); text-decoration: none; font: 600 1.05rem var(--mono); letter-spacing: .02em; flex: none; }
.mark svg { color: var(--signal); display: block; }
nav ul { list-style: none; display: flex; align-items: center; gap: .25rem; margin: 0; padding: 0; }
nav a { display: block; padding: .45rem .8rem; color: var(--ink-2); text-decoration: none; font: 500 .8rem var(--mono); text-transform: uppercase; letter-spacing: .08em; border-radius: 4px; white-space: nowrap; }
nav a:hover { color: var(--ink); background: var(--card); }
nav a[aria-current="page"] { color: var(--signal); background: #ff7a1a14; }

@media (max-width: 720px) {
  .bar { flex-direction: column; align-items: stretch; height: auto; gap: 0; padding-top: .7rem; }
  nav { margin: 0 calc(-1 * var(--gutter)); overflow-x: auto; scrollbar-width: none; }
  nav::-webkit-scrollbar { display: none; }
  nav ul { padding: .45rem calc(var(--gutter) - .8rem) .55rem; }
}

/* ---------- buttons ---------- */
.cta { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 2rem; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 2.9rem; padding: 0 1.3rem; background: var(--signal); color: #160c02; border: 1px solid var(--signal); font: 600 .88rem var(--mono); text-decoration: none; border-radius: 4px; letter-spacing: .02em; }
.btn:hover { background: var(--signal-2); border-color: var(--signal-2); color: #160c02; }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line-2); }
.btn-ghost:hover { background: var(--card); border-color: var(--ink-3); color: var(--ink); }

/* ---------- page sections ---------- */
.hero { padding: clamp(4.5rem, 11vw, 8rem) 0 clamp(4rem, 8vw, 6rem); }
.hero h1 { max-width: 16ch; }
.page-head { padding: clamp(4rem, 9vw, 6.5rem) 0 clamp(3rem, 6vw, 4.5rem); }
.page-head h1 { max-width: 20ch; }
.lost { padding-bottom: 8rem; }

.section { padding: clamp(3.5rem, 7vw, 5.5rem) 0; border-top: 1px solid var(--line); }
.section-alt { background: var(--bg-alt); }
.section h2 { margin-bottom: 2.2rem; }
.section .lede { margin-top: -1.2rem; margin-bottom: 2.5rem; }

/* two-column: heading left, content right */
.split { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 2rem 4rem; align-items: start; }
.split h2 { margin-bottom: 1rem; }
.prose { color: var(--ink-2); max-width: 40rem; }
.prose strong, .prose em { color: var(--ink); }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; gap: 1.5rem; } }

/* ---------- cards ---------- */
.grid { display: grid; gap: 1.25rem; }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 900px) { .grid-3 { grid-template-columns: 1fr; } }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.75rem; }
.card-num { color: var(--signal); margin-bottom: 1.1rem; }
.card p:not(.card-num) { color: var(--ink-2); }

.ticks { list-style: none; padding: 0; margin: 1.25rem 0 0; }
.ticks li { position: relative; padding-left: 1.6rem; margin-bottom: .9rem; }
.ticks li:last-child { margin-bottom: 0; }
.ticks li::before { content: "›"; position: absolute; left: 0; top: -.08em; color: var(--signal); font: 700 1.2rem var(--mono); }

/* ---------- home feature ---------- */
.feature { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 2.5rem 4rem; align-items: center; }
.feature h2 { margin-bottom: 1.2rem; }
.feature-text > p:not(.section-label):not(.cta) { color: var(--ink-2); max-width: 38rem; }
.feature-list { list-style: none; margin: 0; padding: .5rem 1.75rem; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); }
.feature-list li { display: flex; align-items: center; gap: .85rem; padding: .85rem 0; border-bottom: 1px solid var(--line); font-size: .97rem; }
.feature-list li:last-child { border-bottom: 0; }
.feature-list li::before { content: ""; flex: none; width: .5rem; height: .5rem; border-radius: 50%; background: var(--signal); }
@media (max-width: 860px) { .feature { grid-template-columns: 1fr; } }

/* ---------- principles ---------- */
.principles { list-style: none; counter-reset: p; margin: -1.8rem 0 0; padding: 0; }
.principles li:last-child { border-bottom: 0; padding-bottom: 0; }
.principles li { counter-increment: p; display: grid; grid-template-columns: 5rem minmax(0, 4fr) minmax(0, 7fr); gap: .5rem 2rem; align-items: baseline; padding: 1.8rem 0; border-bottom: 1px solid var(--line); }
.principles li::before { content: "P" counter(p, decimal-leading-zero); font: 500 .8rem var(--mono); letter-spacing: .12em; color: var(--signal); }
.principles h3 { margin: 0; }
.principles p { color: var(--ink-2); margin: 0; }
@media (max-width: 760px) {
  .principles li { grid-template-columns: 1fr; gap: .4rem; }
}

/* ---------- timeline ---------- */
.timeline { list-style: none; margin: 0; padding: 0 0 0 .4rem; max-width: 46rem; }
.timeline li { position: relative; padding: 0 0 2.4rem 2.2rem; border-left: 1px solid var(--line-2); }
.timeline li:last-child { padding-bottom: 0; border-left-color: transparent; }
.timeline li::before { content: ""; position: absolute; left: -.45rem; top: .1rem; width: .8rem; height: .8rem; border-radius: 50%; background: var(--bg); border: 2px solid #6a6354; }
.section-alt .timeline li::before { background: var(--bg-alt); }
.timeline li.now::before { background: var(--signal); border-color: var(--signal); box-shadow: 0 0 0 4px #ff7a1a33; }
.timeline .phase { margin-bottom: .35rem; line-height: 1.1; }
.timeline li.now .phase { color: var(--signal); }
.timeline h3 { margin-bottom: .4rem; }
.timeline p:not(.phase) { color: var(--ink-2); }

/* ---------- spec table ---------- */
.spec { width: 100%; border-collapse: collapse; font-size: .97rem; }
.spec th, .spec td { text-align: left; vertical-align: top; padding: .95rem 0; border-bottom: 1px solid var(--line); }
.spec tr:first-child th, .spec tr:first-child td { border-top: 1px solid var(--line); }
.spec th { width: 38%; padding-right: 1.5rem; font: 500 .78rem/1.9 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--ink-3); }
.spec td { color: var(--ink); }
.pill { display: inline-block; margin-left: .5rem; padding: .05rem .5rem; border: 1px solid var(--line-2); border-radius: 999px; font: 500 .7rem/1.6 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--signal-2); vertical-align: 1px; }
@media (max-width: 520px) {
  .spec tr { display: block; padding: .8rem 0; border-bottom: 1px solid var(--line); }
  .spec tr:first-child { border-top: 1px solid var(--line); }
  .spec th, .spec td { display: block; width: auto; padding: 0; border: 0 !important; }
}

/* ---------- system diagram ---------- */
.diagram { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 2rem; overflow-x: auto; }
.diagram svg { display: block; width: 100%; height: auto; min-width: 660px; margin: 0 auto; }
@media (max-width: 640px) { .diagram { padding: 1.25rem; } }
.d-node rect { fill: var(--bg); stroke: var(--line-2); stroke-width: 1.2; }
.d-core rect { fill: #ff7a1a10; stroke: var(--signal); stroke-width: 1.6; }
.d-hand rect { fill: var(--bg); stroke: var(--line-2); stroke-width: 1.2; }
.d-title { fill: var(--ink); font: 600 15px var(--sans); }
.d-sub { fill: var(--ink-3); font: 500 11px var(--mono); letter-spacing: .06em; text-transform: uppercase; }
.d-item { fill: var(--ink-2); font: 400 13.5px var(--sans); }
.d-mini { fill: var(--ink-2); font: 500 11px var(--mono); text-anchor: middle; letter-spacing: .06em; }
.d-tag { fill: var(--signal-2); font: 500 10.5px var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.d-rule { stroke: #ff7a1a55; stroke-width: 1; }
.d-power, .d-link, .d-tunnel { fill: none; stroke-width: 1.6; }
.d-power { stroke: var(--signal); }
.d-link { stroke: #8a8373; }
.d-tunnel { stroke: var(--signal-2); stroke-dasharray: 5 4; }

.legend { list-style: none; display: flex; flex-wrap: wrap; gap: .6rem 1.75rem; margin: 1.1rem 0 0; padding: 0; font: 500 .75rem var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); }
.legend li { display: inline-flex; align-items: center; gap: .55rem; }
.sw { display: inline-block; width: 1.6rem; height: 0; border-top: 2px solid; }
.sw-power { border-color: var(--signal); }
.sw-link { border-color: #8a8373; }
.sw-tunnel { border-color: var(--signal-2); border-top-style: dashed; }

/* ---------- footer ---------- */
.foot { border-top: 1px solid var(--line); padding: 2.5rem 0; color: var(--ink-3); font-size: .85rem; }
.foot-grid { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 1rem 3rem; align-items: start; }
.foot p { margin: 0; }
.foot-tag { color: var(--ink-2); grid-column: 1; }
.foot-meta { grid-column: 1; font-family: var(--mono); font-size: .74rem; line-height: 1.7; }
.foot-copy { grid-column: 2; grid-row: 1 / span 2; align-self: start; font-family: var(--mono); font-size: .74rem; text-align: right; }
@media (max-width: 640px) {
  .foot-grid { grid-template-columns: 1fr; }
  .foot-copy { grid-column: 1; grid-row: auto; text-align: left; }
}