/* ==========================================================================
   Falcon Infosystems — design system
   Direction: refined dark "control room". Deep slate ink, single amber
   signal accent, engineered type (Saira display / IBM Plex Sans body /
   IBM Plex Mono labels). Hairlines, restraint, no glass, no gradients-on-white.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Saira:wght@500;600;700&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  /* Ink scale */
  --ink-0: #0a0d12;   /* page background */
  --ink-1: #0e1219;   /* raised surface */
  --ink-2: #141a24;   /* card surface */
  --ink-3: #1c2432;   /* hover surface */
  --line: #232c3b;    /* hairlines */
  --line-strong: #32405a;

  /* Text */
  --text-hi: #e8edf4;
  --text-mid: #9aa7b8;
  --text-low: #5f6c7e;

  /* Signal accent */
  --amber: #f2a516;
  --amber-hi: #ffc043;
  --amber-ink: #131007;  /* text on amber */
  --amber-dim: rgba(242, 165, 22, 0.14);

  /* Type */
  --font-display: 'Saira', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  /* Rhythm */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6.5rem;
  --container: 72rem;
  --radius: 2px;

  --header-h: 4.25rem;
}

/* ---------- Reset & base ---------- */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 1rem); }

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

body {
  background: var(--ink-0);
  color: var(--text-mid);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--text-hi);
  line-height: 1.15;
  font-weight: 600;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.3rem, 5.5vw, 3.9rem); font-weight: 700; }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); }
h3 { font-size: 1.22rem; }

p { max-width: 62ch; }

a { color: var(--text-hi); text-decoration: none; }
a:hover { color: var(--amber-hi); }

ul { list-style: none; }

::selection { background: var(--amber); color: var(--amber-ink); }

:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 200;
  background: var(--amber); color: var(--amber-ink);
  padding: 0.6rem 1rem; font-weight: 600;
}
.skip-link:focus { left: 0; }

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

/* ---------- Component: mono label (section eyebrow) ---------- */

.label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--amber);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: var(--space-3);
}
.label::before {
  content: "";
  width: 1.75rem; height: 1px;
  background: var(--amber);
}

/* ---------- Component: buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 0.8rem 1.6rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease;
}
.btn-primary {
  background: var(--amber);
  color: var(--amber-ink);
}
.btn-primary:hover { background: var(--amber-hi); color: var(--amber-ink); }
.btn-ghost {
  border-color: var(--line-strong);
  color: var(--text-hi);
  background: transparent;
}
.btn-ghost:hover { border-color: var(--amber); color: var(--amber-hi); }
.btn .arrow { transition: transform 160ms ease; }
.btn:hover .arrow { transform: translateX(3px); }

/* ---------- Header ---------- */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(10, 13, 18, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}
.site-header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.12rem;
  letter-spacing: 0.01em;
  color: var(--text-hi);
}
.brand:hover { color: var(--text-hi); }
.brand-mark {
  width: 2rem; height: 2rem; flex: none;
  color: var(--amber);
}
.brand small {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 400;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--text-low);
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.5vw, 2.2rem);
}
.site-nav a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-mid);
  padding: 0.4rem 0;
  border-bottom: 2px solid transparent;
}
.site-nav a:hover { color: var(--text-hi); }
.site-nav a[aria-current="page"] {
  color: var(--text-hi);
  border-bottom-color: var(--amber);
}
.site-nav .btn { padding: 0.55rem 1.1rem; font-size: 0.85rem; }
.site-nav a.btn-primary,
.site-nav a.btn-primary:hover { color: var(--amber-ink); border-bottom: none; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 0.5rem 0.6rem;
  cursor: pointer;
}
.nav-toggle .bars,
.nav-toggle .bars::before,
.nav-toggle .bars::after {
  content: "";
  display: block;
  width: 1.15rem; height: 2px;
  background: var(--text-hi);
  position: relative;
  transition: transform 180ms ease, opacity 180ms ease;
}
.nav-toggle .bars::before { position: absolute; top: -6px; }
.nav-toggle .bars::after { position: absolute; top: 6px; }
.nav-toggle[aria-expanded="true"] .bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .bars::after { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    background: var(--ink-1);
    border-bottom: 1px solid var(--line);
    display: none;
  }
  .site-nav.open { display: block; }
  .site-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-2) clamp(1.25rem, 4vw, 2.5rem) var(--space-3);
  }
  .site-nav li { border-bottom: 1px solid var(--line); }
  .site-nav li:last-child { border-bottom: none; padding-top: var(--space-2); }
  .site-nav a { display: block; padding: 0.85rem 0; border-bottom: none; }
  .site-nav a[aria-current="page"] { color: var(--amber); }
  .site-nav .btn { display: inline-flex; }
}

/* ---------- Hero ---------- */

.hero {
  padding-top: calc(var(--header-h) + var(--space-6));
  padding-bottom: var(--space-6);
  position: relative;
  overflow: hidden;
}
.hero::before {
  /* faint engineering grid */
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.22;
  mask-image: radial-gradient(ellipse 90% 70% at 30% 20%, black, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 30% 20%, black, transparent 75%);
  pointer-events: none;
}
.hero .container { position: relative; }
.hero h1 { max-width: 17ch; margin-bottom: var(--space-3); }
.hero h1 .accent { color: var(--amber); }
.hero .lede {
  font-size: 1.12rem;
  max-width: 52ch;
  margin-bottom: var(--space-4);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-2); }

.hero-meta {
  margin-top: var(--space-5);
  padding-top: var(--space-3);
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--text-low);
}
.hero-meta span::before {
  content: "▸";
  color: var(--amber);
  margin-right: 0.55rem;
}

/* ---------- Sections ---------- */

.section { padding-block: var(--space-6); }
.section-alt { background: var(--ink-1); border-block: 1px solid var(--line); }
.section-head { margin-bottom: var(--space-5); }
.section-head h2 { max-width: 24ch; }
.section-head .intro { margin-top: var(--space-2); max-width: 58ch; }

/* ---------- Component: card grid ---------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.card {
  background: var(--ink-2);
  padding: var(--space-4) var(--space-3);
  position: relative;
  transition: background-color 160ms ease;
}
.card:hover { background: var(--ink-3); }
.card .card-index {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-low);
  letter-spacing: 0.15em;
  display: block;
  margin-bottom: var(--space-2);
}
.card h3 { margin-bottom: 0.6rem; font-size: 1.08rem; }
.card p { font-size: 0.94rem; }
.card > a::after { content: ""; position: absolute; inset: 0; }
.card:hover .card-index { color: var(--amber); }

/* ---------- Component: feature row (value props) ---------- */

.feature-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: var(--space-4);
}
.feature-row h3 {
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
  padding-top: var(--space-2);
  border-top: 2px solid var(--amber);
  display: inline-block;
}
.feature-row .feature h3 { display: block; }
.feature-row p { font-size: 0.95rem; }

/* ---------- Component: process steps ---------- */

.steps { counter-reset: step; display: grid; gap: 0; border-top: 1px solid var(--line); }
.step {
  counter-increment: step;
  display: grid;
  grid-template-columns: 6rem 1fr;
  gap: var(--space-3);
  padding-block: var(--space-4);
  border-bottom: 1px solid var(--line);
}
.step::before {
  content: "0" counter(step);
  font-family: var(--font-mono);
  font-size: 1.6rem;
  color: var(--amber);
  line-height: 1;
}
.step h3 { margin-bottom: 0.5rem; }
.step p { font-size: 0.96rem; }
@media (max-width: 640px) {
  .step { grid-template-columns: 1fr; gap: var(--space-2); }
}

/* ---------- Component: statement band ---------- */

.statement {
  border-left: 3px solid var(--amber);
  padding-left: var(--space-3);
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.6vw, 1.7rem);
  font-weight: 500;
  color: var(--text-hi);
  max-width: 38ch;
  line-height: 1.4;
}

/* ---------- Component: testimonials ---------- */

.quote-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr));
  gap: var(--space-3);
}
.quote {
  background: var(--ink-2);
  border: 1px solid var(--line);
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.quote blockquote { font-size: 0.97rem; }
.quote blockquote::before { content: "“"; color: var(--amber); font-family: var(--font-display); font-size: 1.6rem; line-height: 0; margin-right: 0.15rem; }
.quote figcaption {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--text-low);
}
.quote figcaption strong { color: var(--text-hi); font-weight: 500; }

/* ---------- Component: service detail sections ---------- */

.service-detail {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: var(--space-4) var(--space-5);
  padding-block: var(--space-5);
  border-bottom: 1px solid var(--line);
}
.service-detail:first-of-type { border-top: 1px solid var(--line); }
.service-detail h2 { font-size: clamp(1.4rem, 2.6vw, 1.9rem); margin-bottom: var(--space-2); }
.service-detail .service-index {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--amber);
  display: block;
  margin-bottom: var(--space-1);
}
.service-detail p + p { margin-top: var(--space-2); }
.service-aside h3 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-low);
  margin-bottom: var(--space-2);
}
.tag-list { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tag-list li {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-mid);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 0.3rem 0.7rem;
}
@media (max-width: 780px) {
  .service-detail { grid-template-columns: 1fr; }
}

/* ---------- Component: service media (photos, theme-infused) ---------- */

.service-media {
  border: 1px solid var(--line);
  margin-bottom: var(--space-3);
  position: relative;
  overflow: hidden;
}
.service-media img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.55) contrast(1.02) brightness(0.88);
  transition: filter 300ms ease;
}
.service-media::after {
  /* amber wash + ink vignette to sit the photo into the dark theme */
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(160deg, rgba(242, 165, 22, 0.10), rgba(10, 13, 18, 0.45) 80%);
  pointer-events: none;
}
.service-detail:hover .service-media img { filter: saturate(0.9) contrast(1.02) brightness(0.95); }

/* ---------- Component: client logo strip ---------- */

.client-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9.5rem, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.client-strip li {
  background: var(--ink-2);
  padding: var(--space-3) var(--space-2);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 6.5rem;
}
.client-strip img {
  max-height: 3.2rem;
  max-width: 80%;
  width: auto;
  object-fit: contain;
  /* light chip so mixed-format logos read cleanly on the dark surface */
  background: #eef1f5;
  padding: 0.5rem 0.8rem;
  border-radius: var(--radius);
  filter: grayscale(1);
  opacity: 0.85;
  transition: opacity 200ms ease, filter 200ms ease;
}
.client-strip li:hover img { opacity: 1; filter: none; }

/* ---------- Component: plain list with markers ---------- */

.marked-list li {
  padding: 0.55rem 0 0.55rem 1.4rem;
  position: relative;
  border-bottom: 1px solid var(--line);
  font-size: 0.96rem;
}
.marked-list li::before {
  content: "▸";
  position: absolute; left: 0;
  color: var(--amber);
}

/* ---------- Component: CTA band ---------- */

.cta-band {
  background: var(--ink-1);
  border-block: 1px solid var(--line);
  padding-block: var(--space-5);
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute; inset: 0;
  background-image: linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 100%;
  opacity: 0.35;
  pointer-events: none;
}
.cta-band .container {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}
.cta-band h2 { max-width: 22ch; }
.cta-band p { margin-top: var(--space-1); }

/* ---------- Contact page ---------- */

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr);
  gap: var(--space-5);
}
@media (max-width: 860px) {
  .contact-layout { grid-template-columns: 1fr; }
}

.contact-card {
  border: 1px solid var(--line);
  background: var(--ink-2);
  padding: var(--space-3);
}
.contact-card + .contact-card { margin-top: var(--space-3); }
.contact-card h3 { font-size: 1rem; margin-bottom: var(--space-1); }
.contact-card .kicker {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
  display: block;
  margin-bottom: var(--space-1);
}
.contact-card address { font-style: normal; font-size: 0.95rem; }
.contact-card a { font-size: 0.95rem; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); }
.form-field { display: flex; flex-direction: column; gap: 0.45rem; }
.form-field.wide { grid-column: 1 / -1; }
.form-field label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-mid);
}
.form-field input,
.form-field select,
.form-field textarea {
  background: var(--ink-1);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  color: var(--text-hi);
  font-family: var(--font-body);
  font-size: 0.98rem;
  padding: 0.75rem 0.9rem;
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--amber);
}
.form-field textarea { min-height: 8rem; resize: vertical; }
.form-note { font-size: 0.88rem; color: var(--text-low); margin-top: var(--space-2); }
@media (max-width: 640px) {
  .form-grid { grid-template-columns: 1fr; }
}

/* ---------- Footer ---------- */

.site-footer {
  background: #070a0f;
  border-top: 1px solid var(--line);
  padding: var(--space-5) 0 var(--space-3);
  font-size: 0.92rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}
@media (max-width: 780px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.site-footer h3 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-low);
  margin-bottom: var(--space-2);
}
.site-footer p { font-size: 0.92rem; }
.site-footer ul li { padding: 0.28rem 0; }
.site-footer a { color: var(--text-mid); }
.site-footer a:hover { color: var(--amber-hi); }
.site-footer address { font-style: normal; color: var(--text-mid); }
.site-footer address + address { margin-top: var(--space-2); }
.site-footer address strong { color: var(--text-hi); font-weight: 500; display: block; }
.footer-legal {
  border-top: 1px solid var(--line);
  padding-top: var(--space-3);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-low);
}

/* ---------- Motion (gated on html.js + no-preference) ---------- */

.reveal { opacity: 1; transform: none; }

@media (prefers-reduced-motion: no-preference) {
  html.js .reveal {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 550ms ease, transform 550ms ease;
  }
  html.js .reveal.visible { opacity: 1; transform: none; }
  html.js .reveal-delay-1 { transition-delay: 90ms; }
  html.js .reveal-delay-2 { transition-delay: 180ms; }
  html.js .reveal-delay-3 { transition-delay: 270ms; }
}