/* Plan AVL landing — booth-at-night theme.
   Color discipline: amber = brand/action, green = systems-go only,
   red = pain/failure only. */

:root {
  --bg: #0E1116;
  --bg-alt: #11151D;
  --panel: #161B23;
  --panel-deep: #0B0E13;
  --border: #232B37;
  --border-soft: #1A2029;
  --text: #E7ECF3;
  --text-dim: #98A2B3;
  --amber: #F5A524;
  --amber-soft: rgba(245, 165, 36, 0.12);
  --green: #34D399;
  --red: #F0566A;
  --mono: ui-monospace, "Cascadia Mono", "SF Mono", Consolas, Menlo, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

/* keep anchor targets clear of the sticky header */
[id] { scroll-margin-top: 76px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 1.0625rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 760px; }
.narrow-p { max-width: 760px; }

h1, h2 { line-height: 1.15; letter-spacing: -0.015em; margin: 0 0 0.6em; }
h1 { font-size: clamp(2rem, 4.5vw, 2.85rem); font-weight: 800; }
h2 { font-size: clamp(1.45rem, 3vw, 1.9rem); font-weight: 800; }
p { margin: 0 0 1.1em; }
p:last-child { margin-bottom: 0; }

.standout {
  font-size: clamp(1.35rem, 2.6vw, 1.7rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 1.2em 0;
}

.lede { font-size: 1.15rem; color: var(--text-dim); }

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  clip: rect(0 0 0 0); overflow: hidden; white-space: nowrap;
}

/* ----- header ----- */

.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(14, 17, 22, 0.88);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-soft);
}

.header-row {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 14px; padding-bottom: 14px;
}

.wordmark { font-weight: 800; font-size: 1.2rem; letter-spacing: -0.01em; }
.wordmark span { color: var(--amber); }
.wordmark-small { font-size: 1.05rem; }

.header-nav { display: flex; align-items: center; gap: 16px; }

.dev-badge {
  font-family: var(--mono); font-size: 0.68rem; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--text-dim);
  border: 1px solid var(--border); border-radius: 999px; padding: 3px 10px;
}

/* ----- buttons & forms ----- */

.btn {
  display: inline-block;
  background: var(--amber); color: #161005;
  font-family: inherit; font-weight: 600; font-size: 1rem;
  border: 0; border-radius: 8px; padding: 12px 22px;
  text-decoration: none; cursor: pointer; white-space: nowrap;
  transition: filter 0.15s ease;
}
.btn:hover { filter: brightness(1.1); }
.btn:disabled { opacity: 0.55; cursor: default; }

.btn-small { padding: 8px 14px; font-size: 0.9rem; }

.btn-ghost {
  background: transparent; color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: var(--amber); color: var(--amber); filter: none; }

.signup-form { margin-top: 28px; }

.form-fields { display: flex; gap: 10px; }
.form-fields[hidden] { display: none; }
.form-fields-wide { flex-wrap: wrap; }

.form-fields input[type="email"],
.form-fields input[type="text"]:not(.hp) {
  flex: 1 1 220px; min-width: 0;
  background: var(--panel-deep); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 12px 14px; font: inherit; font-size: 1rem;
}
.form-fields input:focus {
  outline: none; border-color: var(--amber);
  box-shadow: 0 0 0 3px var(--amber-soft);
}
.form-fields input::placeholder { color: #8A94A6; }

/* honeypot — visually gone, still in the DOM for bots */
.hp { position: absolute !important; left: -9999px !important; width: 1px; height: 1px; opacity: 0; }

.form-status { min-height: 1.3em; margin: 10px 0 0; font-weight: 600; color: var(--green); }
.form-status.is-error { color: var(--red); }
.form-note { font-size: 0.85rem; color: var(--text-dim); margin-top: 10px; }

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

.hero { padding: 88px 0 72px; }

.hero-grid {
  display: grid; grid-template-columns: 1.1fr 0.9fr;
  gap: 56px; align-items: center;
}

.subhead { font-size: 1.15rem; color: var(--text-dim); }
.subhead-status {
  font-family: var(--mono); font-size: 0.85rem; color: var(--amber);
  letter-spacing: 0.02em;
}

/* roster cards */

.hero-visual { margin: 0; }

.roster {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; padding: 14px 16px; margin-bottom: 14px;
  font-size: 0.92rem;
}

.roster-head {
  display: flex; justify-content: space-between; align-items: center;
  padding-bottom: 10px; margin-bottom: 4px;
  border-bottom: 1px solid var(--border-soft);
}
.roster-title { font-weight: 600; font-size: 0.88rem; }
.roster-tag {
  font-family: var(--mono); font-size: 0.65rem; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--text-dim);
}
.roster-tag-ok { color: var(--green); }

.roster-row {
  display: grid; grid-template-columns: 100px 1fr auto;
  gap: 10px; align-items: center;
  padding: 8px 0; border-bottom: 1px solid var(--border-soft);
}
.roster-row:last-child { border-bottom: 0; }

.pos {
  font-family: var(--mono); font-size: 0.68rem; text-transform: uppercase;
  letter-spacing: 0.07em; color: var(--text-dim);
}
.who { font-weight: 600; font-size: 0.9rem; }
.who-repeat { color: var(--amber); text-decoration: underline dotted; text-underline-offset: 3px; }
.who-empty { color: var(--text-dim); font-weight: 400; font-style: italic; }

.roster-after { border-color: rgba(52, 211, 153, 0.35); }

.hero-visual figcaption {
  font-size: 0.88rem; color: var(--text-dim); text-align: center; margin-top: 2px;
}

/* chips */

.chip {
  font-family: var(--mono); font-size: 0.68rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.07em;
  border: 1px solid; border-radius: 999px; padding: 2px 9px;
  white-space: nowrap;
}
.chip-ok    { color: var(--green); border-color: rgba(52, 211, 153, 0.4); }
.chip-warn  { color: var(--amber); border-color: rgba(245, 165, 36, 0.4); }
.chip-alarm { color: var(--red);   border-color: rgba(240, 86, 106, 0.5); animation: pulse 2s ease-in-out infinite; }
.chip-muted { color: var(--text-dim); border-color: var(--border); }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

/* ----- sections ----- */

.section { padding: 76px 0; }
.section-alt {
  background: var(--bg-alt);
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
}

/* ----- modules / compile demo ----- */

.module-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 24px;
  margin: 32px 0;
}

.module-card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; padding: 26px 28px;
}

.module-name {
  font-family: var(--mono); font-weight: 600; font-size: 0.95rem;
  text-transform: uppercase; letter-spacing: 0.1em; color: var(--amber);
  margin: 0 0 14px;
}
.module-when { color: var(--text-dim); text-transform: none; letter-spacing: 0.02em; font-weight: 400; }

.module-card p { font-size: 0.97rem; }

.pull-line {
  font-family: var(--mono); font-size: 0.85rem; color: var(--green);
  border-left: 2px solid var(--green); padding-left: 12px;
}

.compile-demo {
  display: grid; grid-template-columns: 1fr auto 1fr;
  gap: 12px; align-items: center;
  background: var(--panel-deep); border: 1px solid var(--border-soft);
  border-radius: 10px; padding: 16px; margin-top: 18px;
}

.compile-col-label {
  font-family: var(--mono); font-size: 0.63rem; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--text-dim); margin-bottom: 8px;
}

.compile-arrow { color: var(--amber); font-size: 1.4rem; }

.mono-list {
  list-style: none; margin: 0; padding: 0;
  font-family: var(--mono); font-size: 0.8rem; line-height: 1.5;
}
.mono-list li { padding: 3px 0; }
.mono-list li span { display: block; color: var(--text-dim); font-size: 0.73rem; }

/* ----- honest ledger ----- */

.ledger {
  border-top: 1px solid var(--border);
  margin: 28px 0;
}

.ledger-row { padding: 18px 0; border-bottom: 1px solid var(--border); }

.ledger-pos {
  display: inline-block;
  font-family: var(--mono); font-weight: 600; font-size: 0.85rem;
  text-transform: uppercase; letter-spacing: 0.08em;
  margin: 0 12px 0 0; color: var(--text);
}

.ledger-row p { margin: 8px 0 0; color: var(--text-dim); font-size: 0.97rem; }

/* ----- kill switch diagram ----- */

.killswitch {
  margin: 36px 0;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; padding: 20px 20px 16px;
}

/* keep the diagram legible on phones: scroll it instead of shrinking it */
.killswitch-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.killswitch svg { width: 100%; min-width: 560px; height: auto; display: block; }

.wire { fill: none; stroke: #3D4A5E; stroke-width: 1.5; }
.wire-live { stroke: var(--green); stroke-dasharray: 6 5; opacity: 0.85; }

.node rect { fill: var(--panel-deep); stroke: var(--border); stroke-width: 1; }
.node-module rect { stroke: var(--amber); stroke-opacity: 0.55; }
.node-label { fill: var(--text); font-family: var(--mono); font-size: 12px; font-weight: 600; letter-spacing: 0.06em; }
.node-sub { fill: var(--text-dim); font-family: var(--mono); font-size: 10px; }

.dot { fill: var(--green); animation: pulse 2.4s ease-in-out infinite; }

.offline-tag {
  fill: var(--red); font-family: var(--mono); font-size: 11px; font-weight: 600;
  letter-spacing: 0.1em; opacity: 0;
}

.node-conductor, .wire-live, .dot-conductor, .offline-tag { transition: opacity 0.4s ease; }

.is-killed .node-conductor { opacity: 0.3; }
.is-killed .wire-live { stroke: var(--red); opacity: 0.35; }
.is-killed .dot-conductor { fill: var(--red); animation: none; }
.is-killed .offline-tag { opacity: 1; animation: pulse 2s ease-in-out infinite; }

.killswitch-controls { text-align: center; margin-top: 16px; }

.kill-caption {
  min-height: 1.5em; margin: 12px auto 0; max-width: 540px;
  font-size: 0.95rem; color: var(--green); font-weight: 600;
}

/* ----- stack list ----- */

.stack-list { list-style: none; margin: 24px 0; padding: 0; }
.stack-list li {
  padding: 12px 0 12px 24px; position: relative;
  border-bottom: 1px solid var(--border-soft);
}
.stack-list li::before {
  content: "—"; position: absolute; left: 0; color: var(--amber);
}

/* ----- footer ----- */

.site-footer {
  border-top: 1px solid var(--border-soft);
  padding: 44px 0 56px; margin-top: 24px;
}
.footer-row { display: flex; gap: 32px; align-items: flex-start; justify-content: space-between; flex-wrap: wrap; }
.site-footer p { color: var(--text-dim); font-size: 0.82rem; max-width: 560px; margin: 0; }

/* ----- responsive ----- */

@media (max-width: 920px) {
  .hero { padding: 56px 0 48px; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .module-grid { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  body { font-size: 1rem; }
  .section { padding: 56px 0; }
  .form-fields { flex-wrap: wrap; }
  .form-fields .btn { flex: 1 1 100%; }
  .compile-demo { grid-template-columns: 1fr; }
  .compile-arrow { transform: rotate(90deg); text-align: center; }
  .roster-row { grid-template-columns: 86px 1fr auto; gap: 6px; }
  .dev-badge { display: none; }
}

/* narrow phones: let roster chips wrap to their own line instead of overflowing */
@media (max-width: 480px) {
  .roster-row { display: flex; flex-wrap: wrap; align-items: center; }
  .roster-row .pos { flex: 0 0 86px; }
  .roster-row .who { flex: 1; min-width: 0; }
  .roster-row .chip { margin-left: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

@media print {
  :root {
    --bg: #ffffff; --bg-alt: #ffffff; --panel: #ffffff; --panel-deep: #ffffff;
    --border: #999; --border-soft: #ccc; --text: #111; --text-dim: #444;
  }
  body { background: #fff; color: #111; }
  .site-header, .signup-form, .killswitch-controls, .btn { display: none !important; }
  .section, .hero { padding: 24px 0; }
  .node-label { fill: #111; }
  .node-sub { fill: #444; }
}