/* ── International Reclamation Engineers — poster site ────────────────
   Dark engineering-grade design system.
   Tokens: deep navy + signal orange, Space Grotesk / Inter. */

:root {
  --bg: #0b1220;
  --bg-2: #0e1728;
  --card: #111d33;
  --card-border: rgba(148, 163, 184, 0.14);
  --text: #e8edf5;
  --muted: #93a3b8;
  --accent: #ff6a00;
  --accent-soft: rgba(255, 106, 0, 0.12);
  --line: rgba(148, 163, 184, 0.22);
  --strata-1: rgba(255, 106, 0, 0.06);
  --strata-2: rgba(148, 163, 184, 0.10);
  --strata-3: rgba(148, 163, 184, 0.16);
  --strata-4: rgba(148, 163, 184, 0.22);
  --radius: 14px;
  --container: 1080px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { font-family: "Space Grotesk", "Inter", sans-serif; line-height: 1.15; letter-spacing: -0.01em; }

h1 { font-size: clamp(2.1rem, 5.4vw, 3.9rem); font-weight: 700; }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.45rem); font-weight: 600; margin-bottom: 1.1rem; }
h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: 0.45rem; }

p { margin-bottom: 1rem; }
strong { color: var(--text); font-weight: 600; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 22px; }
.accent { color: var(--accent); }

/* ── Hero ─────────────────────────────────────────────── */
.hero {
  position: relative;
  overflow: hidden;
  padding: 90px 0 40px;
  background:
    radial-gradient(1100px 520px at 78% -10%, rgba(255, 106, 0, 0.10), transparent 60%),
    linear-gradient(180deg, var(--bg-2), var(--bg));
}

.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 44px 44px;
  opacity: 0.16;
  pointer-events: none;
  mask-image: linear-gradient(180deg, #000 20%, transparent 85%);
  -webkit-mask-image: linear-gradient(180deg, #000 20%, transparent 85%);
}

.hero-inner { position: relative; z-index: 1; }

.eyebrow {
  font-family: "Space Grotesk", monospace;
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent);
  margin-bottom: 1.4rem;
}

.hero h1 { margin-bottom: 1.2rem; }

.hero-sub {
  color: var(--muted);
  font-size: 1.12rem;
  max-width: 640px;
  margin-bottom: 2rem;
}

.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 2.6rem; }

.btn {
  display: inline-block;
  padding: 14px 26px;
  border-radius: 10px;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  font-size: 0.98rem;
  text-decoration: none;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease;
}
.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--accent);
  color: #10141c;
  box-shadow: 0 10px 28px rgba(255, 106, 0, 0.30);
}
.btn-primary:hover { background: #ff7d22; }

.btn-ghost {
  border: 1px solid var(--card-border);
  color: var(--text);
  background: rgba(148, 163, 184, 0.06);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.hero-stats {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  max-width: 720px;
}
.hero-stats li {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 16px 18px;
}
.hero-stats strong {
  display: block;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.6rem;
  color: var(--accent);
  line-height: 1.1;
}
.hero-stats span { font-size: 0.82rem; color: var(--muted); }

/* Motif */
.hero-motif {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 44px;
}
.motif-label {
  font-family: "Space Grotesk", monospace;
  font-size: 12px;
  letter-spacing: 0.04em;
}

/* ── Sections ─────────────────────────────────────────── */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-2); border-top: 1px solid var(--card-border); border-bottom: 1px solid var(--card-border); }

.section-label {
  font-family: "Space Grotesk", monospace;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent);
  margin-bottom: 0.9rem;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-top: 8px;
}
.two-col p { color: var(--muted); font-size: 1.05rem; }
.two-col strong { color: var(--text); }

/* ── Cards ────────────────────────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 22px 20px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.card:hover { border-color: rgba(255, 106, 0, 0.45); transform: translateY(-2px); }
.card h3 { font-size: 1.02rem; }
.card p { color: var(--muted); font-size: 0.92rem; margin-bottom: 0; }

/* ── How we work ──────────────────────────────────────── */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 30px;
}
.step {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 24px 22px;
}
.step-num {
  font-family: "Space Grotesk", monospace;
  font-size: 0.82rem;
  color: var(--accent);
  letter-spacing: 0.1em;
}
.step h3 { margin: 8px 0 6px; }
.step p { color: var(--muted); font-size: 0.95rem; margin-bottom: 0; }

.how-list { list-style: none; display: grid; gap: 10px; max-width: 720px; }
.how-list li {
  padding-left: 28px;
  position: relative;
  color: var(--muted);
}
.how-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.62em;
  width: 14px; height: 3px;
  background: var(--accent);
  border-radius: 2px;
}

/* ── FAQ ──────────────────────────────────────────────── */
.faq { max-width: 760px; }
.faq-item {
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  background: var(--card);
  margin-bottom: 12px;
  overflow: hidden;
}
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 22px;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  font-size: 1.04rem;
  position: relative;
  padding-right: 46px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 22px; top: 50%;
  transform: translateY(-50%);
  font-size: 1.3rem;
  color: var(--accent);
  transition: transform 0.15s ease;
}
.faq-item[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-item p { padding: 0 22px 18px; color: var(--muted); font-size: 0.98rem; }

/* ── CTA ──────────────────────────────────────────────── */
.cta {
  text-align: center;
  background:
    radial-gradient(900px 380px at 50% 120%, rgba(255, 106, 0, 0.14), transparent 65%),
    var(--bg-2);
  border-top: 1px solid var(--card-border);
}
.cta h2 { margin-bottom: 0.6rem; }
.cta p { color: var(--muted); margin-bottom: 1.8rem; }
.cta .hero-cta { justify-content: center; }
.cta-note { font-size: 0.8rem; color: var(--muted); opacity: 0.7; }

/* ── Footer ───────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--card-border);
  padding: 34px 0;
  background: var(--bg);
}
.footer p { margin-bottom: 0.25rem; color: var(--muted); font-size: 0.92rem; }
.footer-meta { font-size: 0.8rem; opacity: 0.7; }

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 900px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .section { padding: 70px 0; }
  .hero { padding-top: 60px; }
  .two-col { grid-template-columns: 1fr; gap: 18px; }
  .card-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .hero-cta .btn { width: 100%; text-align: center; }
  .hero-stats strong { font-size: 1.35rem; }
}

/* ── Accessibility ────────────────────────────────────── */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}