/* Xeffective Systems — graphite + amber. Colours are tokens; edit here only. */

/* Space Grotesk, self-hosted (SIL OFL 1.1, see /fonts/OFL.txt). Latin subset. */
@font-face { font-family: "Space Grotesk"; font-style: normal; font-weight: 400; font-display: swap; src: url("/fonts/space-grotesk-latin-400.woff2") format("woff2"); }
@font-face { font-family: "Space Grotesk"; font-style: normal; font-weight: 600; font-display: swap; src: url("/fonts/space-grotesk-latin-600.woff2") format("woff2"); }
@font-face { font-family: "Space Grotesk"; font-style: normal; font-weight: 700; font-display: swap; src: url("/fonts/space-grotesk-latin-700.woff2") format("woff2"); }

:root {
  --bg: #FAFAF9;
  --bg-alt: #F1F0EC;
  --surface: #FFFFFF;
  --text: #1F2328;
  --muted: #555B62;
  --border: #DEDCD6;
  --accent: #A84E08;        /* 5.3:1 on --bg, 4.9:1 on --bg-alt, 5.6:1 white-on (AA) */
  --accent-hover: #92400E;
  --on-accent: #FFFFFF;
  /* Logo symbol, "on light" version */
  --logo-main: #14171C;
  --logo-blue: #3F7FB8;
  --logo-amber: #F2A20C;
  --logo-core: #FFFFFF;
  --focus: #A84E08;

  --brand-font: "Space Grotesk", system-ui, sans-serif;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, "Liberation Mono", monospace;
  --wrap: 68rem;
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111315;
    --bg-alt: #171A1D;
    --surface: #1C2024;
    --text: #E8E6E3;
    --muted: #A7ADB4;
    --border: #2D3238;
    --accent: #F59E0B;
    --accent-hover: #FBBF24;
    --on-accent: #111315;
    /* Logo symbol, "on dark" version */
    --logo-main: #E8EAED;
    --logo-blue: #7FB3E0;
    --logo-core: #14171C;
    --focus: #FBBF24;
  }
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.6;
}

h1, h2, h3 { font-family: var(--brand-font); line-height: 1.15; margin: 0 0 .6em; letter-spacing: -0.015em; }
h1 { font-size: clamp(2.5rem, 7vw, 4.75rem); font-weight: 700; letter-spacing: -0.035em; }
h2 { font-size: clamp(1.75rem, 3.6vw, 2.5rem); font-weight: 700; max-width: 24ch; }
h3 { font-size: 1.15rem; font-weight: 700; }
p { margin: 0 0 1em; }

a { color: var(--accent); text-underline-offset: .18em; }
a:hover { color: var(--accent-hover); }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 4px; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 1.25rem; }

.skip {
  position: absolute; left: 1rem; top: -4rem; z-index: 10;
  background: var(--text); color: var(--bg); padding: .6rem 1rem; border-radius: 6px;
}
.skip:focus { top: 1rem; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 5;
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 4rem; }
.brand { display: inline-flex; align-items: center; gap: .65rem; color: var(--text); text-decoration: none; }
.brand:hover { color: var(--text); }

/* Logo symbol (inline SVG; colours switch with the theme) */
.logo-symbol { width: 2.4rem; height: 2.4rem; flex: none; }
.logo-symbol path { fill: none; stroke-width: 5; stroke-linecap: round; }
.logo-symbol .ls-main { stroke: var(--logo-main); }
.logo-symbol .ls-blue { stroke: var(--logo-blue); }
.logo-symbol .ls-blue-fill { fill: var(--logo-blue); }
.logo-symbol .ls-amber { stroke: var(--logo-amber); }
.logo-symbol .ls-amber-fill { fill: var(--logo-amber); }
.logo-symbol .ls-core { fill: var(--logo-core); }

/* Wordmark */
.wordmark { display: flex; flex-direction: column; line-height: 1.1; }
.wm-name { font-family: var(--brand-font); font-size: 1.15rem; letter-spacing: -0.01em; }
.wm-x { font-weight: 600; }
.wm-sys { font-weight: 400; color: var(--muted); }
.wm-say { font-family: var(--mono); font-size: .72rem; color: var(--muted); margin-top: .15rem; }

nav ul { display: flex; gap: 1.4rem; list-style: none; margin: 0; padding: 0; align-items: center; }
nav a { color: var(--muted); text-decoration: none; font-size: .95rem; font-weight: 550; }
nav a:hover { color: var(--text); }
nav .nav-cta { color: var(--accent); }
/* Phones: brand on the first row, all four links in a compact second row. No JS. */
@media (max-width: 760px) {
  .site-header { position: static; }
  .header-inner { flex-wrap: wrap; row-gap: 0; padding-top: .7rem; padding-bottom: .5rem; min-height: 0; }
  nav { width: 100%; }
  nav ul { flex-wrap: wrap; gap: .25rem 1.1rem; }
  nav a { display: inline-block; font-size: .875rem; padding: .45rem 0; }  /* ~36px tap height */
}

/* Sections */
.section { padding: clamp(4rem, 9vw, 6.5rem) 0; border-top: 1px solid var(--border); }
.section-alt { background: var(--bg-alt); }
.eyebrow {
  font-family: var(--mono); font-size: .8rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: .12em; color: var(--accent);
  margin-bottom: 1rem;
}
.section-lede { font-size: 1.15rem; color: var(--muted); max-width: 62ch; }

/* Hero */
.hero { padding: clamp(4.5rem, 12vw, 9rem) 0 clamp(4rem, 10vw, 7rem); position: relative; overflow: hidden; }
/* Decorative "crossing" motif: two thin lines over two soft bands, crossing at a shallow angle. */
.hero-motif {
  position: absolute; inset: 0; width: 100%; height: 100%;
  color: var(--accent); pointer-events: none;
}
.hero-motif path { fill: none; stroke: url(#fade); vector-effect: non-scaling-stroke; }
.hero-motif .band { stroke-width: 34px; opacity: .07; }
.hero-motif .line { stroke-width: 1.5px; opacity: .45; }
.mission { margin-top: 1.75rem; font-size: .95rem; color: var(--muted); max-width: 60ch; padding-left: .9rem; border-left: 2px solid var(--accent); }
.hero .wrap { position: relative; z-index: 1; }
.name-intro { font-size: 1.05rem; color: var(--muted); max-width: 62ch; margin-bottom: 1.75rem; }
.ni-name { font-family: var(--brand-font); font-weight: 600; color: var(--text); }
.name-intro .accent { white-space: nowrap; }
.accent { color: var(--accent); }
.lede { font-size: clamp(1.15rem, 2vw, 1.35rem); color: var(--muted); max-width: 52ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 2rem; }

.btn {
  display: inline-block; padding: .85rem 1.35rem; border-radius: 8px;
  font-weight: 650; text-decoration: none; border: 2px solid transparent;
  overflow-wrap: anywhere;
}
.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: var(--accent-hover); color: var(--on-accent); }
.btn-ghost { border-color: var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--text); color: var(--text); }

/* Problem */
.points { list-style: none; margin: 2.5rem 0 0; padding: 0; display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); counter-reset: pt; }
.points li { counter-increment: pt; border-top: 3px solid var(--text); padding-top: 1.25rem; }
.points li::before { content: "0" counter(pt); display: block; font-family: var(--mono); font-size: .85rem; color: var(--accent); font-weight: 700; margin-bottom: .5rem; }
.points p { color: var(--muted); margin: 0; }

/* Building */
.cards { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr)); margin: 2.5rem 0 3rem; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.75rem; border-left: 4px solid var(--accent); }
.card p { color: var(--muted); margin: 0; }
.outcomes-title { font-size: 1rem; color: var(--muted); font-weight: 600; }
.outcomes { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: .6rem; }
.outcomes li { background: var(--surface); border: 1px solid var(--border); border-radius: 999px; padding: .45rem 1rem; font-weight: 600; font-size: .95rem; }

/* Founder */
.founder { display: grid; grid-template-columns: minmax(14rem, 1fr) 2fr; gap: 2rem 4rem; }
.role { color: var(--muted); font-weight: 600; }
.bio p:first-child { font-size: 1.1rem; }
.link-arrow { font-weight: 650; }
.link-arrow::after { content: " \2192"; }
@media (max-width: 760px) { .founder { grid-template-columns: 1fr; } }

/* Contact */
.contact .btn { margin-top: .25rem; font-size: 1.05rem; }
.contact-hint { font-weight: 600; margin-top: 1.5rem; }


/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 2rem 0; color: var(--muted); font-size: .9rem; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem 2rem; }
.footer-inner p { margin: 0; }

/* 404 */
.notfound { min-height: 70vh; display: grid; align-content: center; }
@media (max-width: 760px) { .hero-motif .line { opacity: .3; } .hero-motif .band { opacity: .05; } }