/* Eskay Consulting — site styles.
   Direction: airfield signage and crew checklists. Apron black, signal brass, cool chart paper.
   Tokens first (light + dark), then base, then components. No inline styles are used in the
   HTML, so the CSP can stay strict (style-src 'self'). No web fonts: every face below is
   already installed on the visitor's device. */

:root {
  --paper: #E9EBE7;          /* chart paper */
  --paper-2: #DCDFDA;
  --line: #C5CAC3;
  --ink: #181A1D;            /* apron black */
  --ink-soft: #5A6068;       /* instrument grey */
  --brass: #8F6E28;          /* graphics */
  --brass-strong: #6E5620;   /* brass text on paper (5.8:1) */
  --focus: #6E5620;

  /* "Band" = the apron-black ground for header, hero, CTA and footer */
  --band: #181A1D;
  --band-ink: #E9EBE7;
  --band-soft: #A3AAB1;
  --band-line: #2C3238;      /* cockpit slate */
  --band-brass: #C9A75C;     /* signal brass */

  --btn-bg: var(--band);
  --btn-ink: var(--band-ink);
  --btn-bg-hover: #2C3238;

  --mark-ink: var(--ink);
  --mark-brass: var(--brass);

  /* Headings lean on DIN, the signage lineage: DIN Alternate (macOS), Bahnschrift (Windows). */
  --font-head: 'DIN Alternate', 'Bahnschrift', 'Avenir Next', 'Segoe UI', system-ui, sans-serif;
  --font-body: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-brand: 'Iowan Old Style', 'Palatino Linotype', Palatino, Georgia, 'Times New Roman', serif; /* wordmark only */

  --maxw: 1120px;
  --gutter: clamp(20px, 5vw, 40px);
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #131517;
    --paper-2: #1A1D20;
    --line: #2A2F34;
    --ink: #E4E6E2;
    --ink-soft: #A4ABB2;
    --brass: #C9A75C;
    --brass-strong: #D9BC76;
    --focus: #C9A75C;

    --band: #0C0E10;
    --band-line: #23282D;

    --btn-bg: var(--brass);
    --btn-ink: #0C0E10;
    --btn-bg-hover: #D9BC76;
  }
}

.band {
  background: var(--band);
  color: var(--band-ink);
  --btn-bg: var(--band-brass);
  --btn-ink: #181A1D;
  --btn-bg-hover: #D9BC76;
  --mark-ink: var(--band-ink);
  --mark-brass: var(--band-brass);
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; }
.band :focus-visible { outline-color: var(--band-brass); }

.container {
  width: 100%;
  max-width: calc(var(--maxw) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.skip {
  position: absolute; left: -999px; top: 8px; z-index: 100;
  background: var(--band-brass); color: #181A1D;
  padding: 10px 16px; font-weight: 600; text-decoration: none;
}
.skip:focus { left: 8px; }

/* ---------- type ---------- */
h1, h2, h3 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0;
  margin: 0;
  text-wrap: balance;
}
h1 { font-size: clamp(2.5rem, 5.6vw, 4.5rem); line-height: 1.04; }
h2 { font-size: clamp(1.75rem, 3vw, 2.375rem); }
h3 { font-size: 1.3125rem; }
p { margin: 0 0 1em; max-width: 62ch; }
.lede { font-size: clamp(1.1rem, 1.6vw, 1.3rem); line-height: 1.55; color: var(--ink-soft); }
.band .lede { color: var(--band-soft); }

.text-link {
  color: var(--brass-strong); font-weight: 600; text-decoration: none;
  border-bottom: 1px solid currentColor; padding-bottom: 1px;
}
.text-link:hover { border-bottom-width: 2px; }

/* ---------- mark ---------- */
.mark .m-ink { fill: none; stroke: var(--mark-ink); stroke-width: 2.5; }
.mark .m-strut { stroke: var(--mark-brass); stroke-width: 2; }
.mark .m-dot { fill: var(--mark-brass); }
.mark .m-text, .gyro .g-text {
  fill: var(--mark-ink); font-family: var(--font-brand); font-weight: 700;
  font-size: 34px; letter-spacing: -1.5px; text-anchor: middle;
}

/* ---------- header ---------- */
.site-header { border-bottom: 1px solid var(--band-line); }
.header-inner {
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding-block: 16px;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-mark { width: 40px; height: 40px; flex: none; }
.brand-text { display: flex; flex-direction: column; gap: 5px; line-height: 1; }
.brand-name { font: 700 1.375rem/1 var(--font-brand); letter-spacing: 0.02em; }
.brand-sub {
  font: 600 0.5625rem/1 var(--font-body);
  letter-spacing: 0.34em; text-transform: uppercase; color: var(--band-soft);
}
.nav { display: flex; align-items: center; gap: clamp(16px, 3vw, 32px); font-size: 0.9375rem; }
.nav a {
  text-decoration: none; color: var(--band-soft);
  padding: 6px 0; border-bottom: 1px solid transparent;
}
.nav a:hover, .nav a[aria-current="page"] { color: var(--band-ink); border-bottom-color: var(--band-brass); }
.nav .nav-cta {
  color: var(--band-brass); border: 1px solid var(--band-brass);
  padding: 9px 16px; border-radius: 3px;
}
.nav .nav-cta:hover, .nav .nav-cta[aria-current="page"] { background: var(--band-brass); color: #181A1D; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center;
  font: 600 0.9375rem/1 var(--font-body);
  padding: 16px 24px; border-radius: 3px; text-decoration: none;
  border: 1px solid transparent; cursor: pointer;
}
.btn-solid { background: var(--btn-bg); color: var(--btn-ink); }
.btn-solid:hover { background: var(--btn-bg-hover); }
.btn-line { border-color: var(--band-line); color: var(--band-ink); }
.btn-line:hover { border-color: var(--band-brass); color: var(--band-brass); }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px 16px; }

/* ---------- hero ---------- */
.hero { position: relative; overflow: hidden; padding-block: clamp(56px, 8vw, 112px); }
.swarm { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.hero-grid {
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: clamp(32px, 6vw, 72px); align-items: center;
  position: relative; z-index: 1;
}
.hero h1 { margin-bottom: 24px; max-width: 17ch; }
.hero .lede { max-width: 50ch; margin-bottom: 36px; }
.gyro-wrap { justify-self: end; width: min(100%, 520px); }
.gyro { width: 100%; height: auto; overflow: visible; }
.gyro .g-frame, .gyro .g-dial {
  fill: none; stroke: var(--mark-ink); stroke-width: 2px; vector-effect: non-scaling-stroke;
}
.gyro .g-strut { stroke: var(--mark-brass); stroke-width: 1.5px; vector-effect: non-scaling-stroke; }
.gyro .g-dot { fill: var(--mark-brass); }

/* ---------- sections ---------- */
.section { padding-block: clamp(56px, 8vw, 104px); }
.section-alt { background: var(--paper-2); }
.section-head { max-width: 62ch; margin-bottom: clamp(28px, 4vw, 48px); }
.section-head h2 { margin-bottom: 16px; }
.section-head .lede { margin: 0; }

.split {
  display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  gap: clamp(32px, 6vw, 80px); align-items: start;
}
.split h2 { margin-bottom: 16px; }
.split .lede { margin: 0 0 1em; }
.split .lede:last-child { margin-bottom: 0; }

/* ---------- flow: the life of a roster ---------- */
.flow {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(14, minmax(0, 1fr)); gap: 10px 0;
}
.flow-bar, .flow-bus { position: relative; display: grid; gap: 2px; }
.flow-bar {
  padding: 14px 20px 15px; background: var(--band); color: var(--band-ink);
  border-left: 4px solid var(--band-brass); outline: 1px solid var(--band-line); outline-offset: -1px;
}
.flow-1 { grid-column: 1 / span 6; }
.flow-2 { grid-column: 3 / span 6; }
.flow-3 { grid-column: 5 / span 6; }
.flow-4 { grid-column: 7 / span 6; }
.flow-5 { grid-column: 9 / span 6; }
.flow-name { font: 700 1.1875rem/1.25 var(--font-head); text-decoration: none; }
.flow-name::after { content: ""; position: absolute; inset: 0; }   /* the whole bar is the link */
.flow-name:focus-visible { outline: none; }
.flow-bar:focus-within, .flow-bus:focus-within { outline: 2px solid var(--focus); outline-offset: 3px; }
.flow-bar:hover .flow-name { text-decoration: underline; text-decoration-color: var(--band-brass); text-underline-offset: 5px; text-decoration-thickness: 2px; }
.flow-out { font-size: 0.9375rem; line-height: 1.4; color: var(--band-soft); }
.flow-bus {
  margin-top: 10px; padding: 16px 20px;
  border: 1.5px solid var(--brass);
  background: color-mix(in srgb, var(--brass) 9%, transparent);
  grid-template-columns: auto 1fr; align-items: baseline; gap: 6px 28px;
}
.flow-bus .flow-out { color: var(--ink-soft); }
.flow-bus:hover .flow-name { text-decoration: underline; text-decoration-color: var(--brass); text-underline-offset: 5px; text-decoration-thickness: 2px; }

/* ---------- lamps: four checks, all lit ---------- */
.lamps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.lamp { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 16px; align-items: start; padding: 20px 20px 22px; background: var(--paper); border: 1px solid var(--line); }
.lamp-light {
  width: 14px; height: 14px; margin-top: 5px; border-radius: 50%; background: var(--brass);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--brass) 22%, transparent), 0 0 16px color-mix(in srgb, var(--brass) 55%, transparent);
}
.lamp-name { display: block; font: 700 1.1875rem/1.25 var(--font-head); margin-bottom: 4px; }
.lamp-out { display: block; color: var(--ink-soft); line-height: 1.45; }

/* ---------- process ---------- */
.steps {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0 32px;
}
.step { position: relative; padding-top: 36px; }
.step::before { content: ""; position: absolute; top: 0; left: 0; right: -32px; height: 1px; background: var(--line); }
.step:last-child::before { right: 0; }
.step::after { content: ""; position: absolute; top: -4px; left: 0; width: 9px; height: 9px; border-radius: 50%; background: var(--brass); }
.step h3 { margin-bottom: 8px; }
.step p { color: var(--ink-soft); font-size: 0.975rem; margin: 0; }

/* ---------- punchline: every airline, every dimension ---------- */
.punch { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: clamp(32px, 6vw, 80px); align-items: center; }
.punch h2 { font-size: clamp(2rem, 4.2vw, 3.375rem); line-height: 1.08; margin-bottom: 22px; }
.punch-line { display: block; }
.punch .lede { max-width: 48ch; margin: 0; }
.tess { width: min(100%, 340px); height: auto; justify-self: end; }
.tess-edge { stroke: var(--brass); stroke-linecap: round; }
.tess-dot { fill: var(--brass); }

/* ---------- CTA band ---------- */
.cta { padding-block: clamp(56px, 8vw, 96px); }
.cta-grid { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 32px; }
.cta h2 { max-width: 22ch; }
.cta p { margin: 12px 0 0; color: var(--band-soft); }

/* ---------- page head (inner pages) ---------- */
.page-head { padding-block: clamp(48px, 7vw, 88px) clamp(40px, 6vw, 72px); }
.page-head h1 { font-size: clamp(2.25rem, 4.8vw, 3.75rem); margin-bottom: 18px; max-width: 20ch; }
.page-head .lede { max-width: 56ch; margin: 0; }

/* ---------- solutions ---------- */
.offer {
  display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  gap: clamp(24px, 5vw, 72px); padding-block: clamp(36px, 5vw, 64px);
  scroll-margin-top: 24px;
}
.offer + .offer { border-top: 1px solid var(--line); }
.offer p { color: var(--ink-soft); }
.scope { list-style: none; margin: 18px 0 0; padding: 0; display: grid; gap: 10px; }
.scope li { position: relative; padding-left: 28px; }
.scope li::before {
  content: ""; position: absolute; left: 0; top: 0.42em;
  width: 11px; height: 11px; border: 1.5px solid var(--brass);
}

/* ---------- roster diagram ---------- */
.diagram { margin: 0; }
.diagram-scroll { overflow-x: auto; }
.diagram svg { width: 100%; min-width: 640px; height: auto; }
.diagram figcaption { margin-top: 14px; font-size: 0.875rem; color: var(--ink-soft); max-width: 70ch; }
.d-grid { stroke: var(--line); stroke-width: 1; }
.d-bar { fill: var(--brass); }
.d-label { fill: var(--ink); font: 600 12px var(--font-body); }
.d-day { fill: var(--ink-soft); font: 500 11px var(--font-body); text-anchor: middle; }
.d-start { text-anchor: start; }
.d-area { fill: var(--brass); fill-opacity: 0.16; }
.d-curve { fill: none; stroke: var(--brass-strong); stroke-width: 2; }
.d-limit { stroke: var(--ink-soft); stroke-width: 1; stroke-dasharray: 4 4; }
.d-flag { fill: none; stroke: var(--brass-strong); stroke-width: 2; }
.d-note { fill: var(--ink); font: 600 12px var(--font-body); text-anchor: end; }

/* ---------- about ---------- */
.principles { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 40px; }
.principles h3 { margin-bottom: 8px; }
.principles p { color: var(--ink-soft); margin: 0; }
.figure-mark { width: min(100%, 300px); }

/* ---------- contact ---------- */
.contact-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(32px, 6vw, 80px); align-items: start; }
.contact-side h2 { font-size: 1.5rem; margin-bottom: 12px; }
.contact-side h2:not(:first-child) { margin-top: 32px; }
.contact-side ul { padding-left: 1.1em; margin: 0 0 1.5em; color: var(--ink-soft); }
.contact-side li { margin-bottom: 6px; }
.form {
  display: grid; gap: 20px; padding: clamp(20px, 4vw, 36px);
  background: var(--paper-2); border: 1px solid var(--line);
}
.field { display: grid; gap: 8px; }
.field label { font: 600 0.875rem/1.2 var(--font-body); }
.field .opt { font-weight: 400; color: var(--ink-soft); }
.field input, .field textarea {
  width: 100%; font: inherit; color: var(--ink);
  background: var(--paper); border: 1px solid var(--line); border-radius: 3px;
  padding: 12px 14px;
}
.field textarea { min-height: 160px; resize: vertical; }
.field input:focus-visible, .field textarea:focus-visible { outline-offset: 0; border-color: var(--brass); }
.form .btn { justify-self: start; }
.form-note { margin: 0; font-size: 0.875rem; color: var(--ink-soft); }
.hp { display: none; }

/* ---------- prose (privacy etc.) ---------- */
.prose { max-width: 68ch; }
.prose h2 { font-size: 1.4rem; margin: 2em 0 0.5em; }
.prose h2:first-child { margin-top: 0; }

/* ---------- footer ---------- */
.site-footer { padding-block: 56px 32px; border-top: 1px solid var(--band-line); }
.footer-grid { display: grid; grid-template-columns: minmax(0, 2fr) repeat(2, minmax(0, 1fr)); gap: 40px; }
.footer-grid p { color: var(--band-soft); font-size: 0.9375rem; margin: 16px 0 0; max-width: 34ch; }
.footer-grid h2 { font: 700 1rem/1 var(--font-head); color: var(--band-ink); margin: 0 0 16px; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.footer-grid a { text-decoration: none; color: var(--band-soft); }
.footer-grid a:hover { color: var(--band-ink); text-decoration: underline; text-decoration-color: var(--band-brass); text-underline-offset: 4px; }
.legal {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px;
  margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--band-line);
  font-size: 0.8125rem; color: var(--band-soft);
}
.legal a { text-underline-offset: 3px; }

/* ---------- responsive ---------- */
@media (max-width: 880px) {
  .flow { grid-template-columns: minmax(0, 1fr); }
  .flow-1, .flow-2, .flow-3, .flow-4, .flow-5 { grid-column: 1; }
  .flow-2 { margin-left: 3%; }
  .flow-3 { margin-left: 6%; }
  .flow-4 { margin-left: 9%; }
  .flow-5 { margin-left: 12%; }
  .flow-bus { grid-template-columns: minmax(0, 1fr); }
  .hero-grid, .split, .offer, .contact-grid, .punch { grid-template-columns: minmax(0, 1fr); }
  .tess { justify-self: start; width: min(100%, 240px); }
  .gyro-wrap { justify-self: start; width: min(100%, 340px); }
  .principles { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid > :first-child { grid-column: 1 / -1; }

  .steps { grid-template-columns: minmax(0, 1fr); }
  .step { padding: 0 0 28px 32px; }
  .step::before { top: 8px; bottom: 0; left: 4px; right: auto; width: 1px; height: auto; }
  .step:last-child::before { display: none; }
  .step::after { top: 5px; left: 0; }
}
@media (max-width: 640px) {
  .lamps { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 560px) {
  .brand-sub { display: none; }
  .nav { gap: 14px; font-size: 0.875rem; }
  .nav .nav-cta { padding: 8px 12px; }
}