/* ============================================================
   CopperQuarry AI — copperquarry.top
   Design system: "cava di dati" — strati geologici + griglie analitiche
   ============================================================ */

:root {
  --rock: #16120e;
  --rock-2: #1f1913;
  --rock-3: #2a221a;
  --copper: #c97b3d;
  --copper-deep: #a35e2c;
  --patina: #5e9c8c;
  --sand: #ebe2d6;
  --sand-dim: #b9ab99;
  --line: rgba(201, 123, 61, 0.22);
  --radius: 10px;
  --maxw: 1180px;
  --font-display: "Archivo", sans-serif;
  --font-body: "IBM Plex Sans", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  background: var(--rock);
  color: var(--sand);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--copper); text-decoration: none; }
a:hover { color: var(--sand); }
a:focus-visible, button:focus-visible, input:focus-visible,
textarea:focus-visible, select:focus-visible {
  outline: 2px solid var(--patina);
  outline-offset: 3px;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- grid backdrop ---------- */
.grid-bg {
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 56px 56px;
}

/* ---------- strata depth label (signature element) ---------- */
.stratum { position: relative; padding: 96px 0; border-top: 1px solid var(--line); }
.stratum::before {
  content: attr(data-depth);
  position: absolute;
  top: 18px; left: 24px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--copper);
  text-transform: uppercase;
}
.stratum::after {
  content: "";
  position: absolute;
  top: 24px; left: 150px; right: 24px;
  height: 1px;
  background: linear-gradient(90deg, var(--copper), transparent 70%);
  opacity: 0.45;
}

/* ---------- typography ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--patina);
  margin-bottom: 14px;
}
h1, h2, h3 { font-family: var(--font-display); line-height: 1.08; }
h1 { font-size: clamp(2.4rem, 6vw, 4.6rem); font-weight: 800; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 800; margin-bottom: 18px; }
h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 10px; }
.lead { font-size: 1.18rem; color: var(--sand-dim); max-width: 62ch; }
.copper-text { color: var(--copper); }

/* ---------- header ---------- */
header.site {
  position: sticky; top: 0; z-index: 60;
  background: rgba(22, 18, 14, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px; max-width: var(--maxw); margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 12px; color: var(--sand); font-family: var(--font-display); font-weight: 800; font-size: 1.1rem; letter-spacing: 0.01em; }
.brand svg { width: 32px; height: 32px; }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { color: var(--sand-dim); font-size: 0.95rem; }
.nav-links a:hover { color: var(--copper); }
.nav-toggle { display: none; background: none; border: 1px solid var(--line); color: var(--sand); font-size: 1.3rem; padding: 4px 12px; border-radius: 6px; cursor: pointer; }

/* ---------- buttons ---------- */
.btn {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.98rem;
  padding: 14px 28px;
  border-radius: var(--radius);
  border: 1px solid var(--copper);
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease;
}
.btn-solid { background: var(--copper); color: var(--rock); }
.btn-solid:hover { background: var(--sand); border-color: var(--sand); color: var(--rock); transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--copper); }
.btn-ghost:hover { background: rgba(201, 123, 61, 0.12); color: var(--sand); }

/* ---------- hero ---------- */
.hero { padding: 110px 0 90px; position: relative; overflow: hidden; }
.hero-inner { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 56px; align-items: center; }
.hero h1 span { color: var(--copper); }
.hero .lead { margin: 22px 0 32px; }
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; }

/* quarry cross-section visual */
.quarry {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--rock-2);
}
.quarry img { width: 100%; height: 320px; object-fit: cover; opacity: 0.85; }
.quarry-layers { padding: 0; }
.layer {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 18px;
  font-family: var(--font-mono); font-size: 13px;
  border-top: 1px solid var(--line);
}
.layer b { color: var(--copper); font-weight: 600; }
.layer .bar { flex: 1; height: 6px; margin: 0 16px; background: var(--rock-3); border-radius: 3px; overflow: hidden; }
.layer .bar i { display: block; height: 100%; background: linear-gradient(90deg, var(--copper-deep), var(--copper)); border-radius: 3px; }
.layer:nth-child(3) .bar i { background: linear-gradient(90deg, #3d6e62, var(--patina)); }

/* ---------- cards ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 46px; }
.card {
  background: var(--rock-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  display: flex; flex-direction: column; gap: 10px;
  transition: transform 0.18s ease, border-color 0.18s ease;
}
.card:hover { transform: translateY(-4px); border-color: var(--copper); }
.card .tag { font-family: var(--font-mono); font-size: 12px; color: var(--patina); letter-spacing: 0.15em; text-transform: uppercase; }
.card p { color: var(--sand-dim); font-size: 0.98rem; }
.card img { border-radius: 6px; height: 160px; object-fit: cover; margin-bottom: 8px; }

/* ---------- process ---------- */
.process { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 46px; }
.phase {
  border-left: 3px solid var(--copper);
  background: linear-gradient(180deg, var(--rock-2), transparent);
  padding: 22px 20px;
  border-radius: 0 var(--radius) var(--radius) 0;
}
.phase .num { font-family: var(--font-mono); color: var(--copper); font-size: 13px; letter-spacing: 0.15em; }
.phase h3 { margin-top: 8px; font-size: 1.05rem; }
.phase p { color: var(--sand-dim); font-size: 0.92rem; }

/* ---------- pricing ---------- */
.pricing { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 46px; align-items: stretch; }
.plan {
  background: var(--rock-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 28px;
  display: flex; flex-direction: column;
}
.plan.featured { border-color: var(--copper); background: linear-gradient(180deg, rgba(201,123,61,0.10), var(--rock-2) 55%); }
.plan .tag { font-family: var(--font-mono); font-size: 12px; color: var(--patina); letter-spacing: 0.18em; text-transform: uppercase; }
.plan h3 { font-size: 1.4rem; margin: 10px 0 4px; }
.price { font-family: var(--font-display); font-weight: 800; font-size: 2.3rem; color: var(--copper); margin: 12px 0 2px; }
.price small { font-size: 0.95rem; color: var(--sand-dim); font-family: var(--font-body); font-weight: 400; }
.plan ul { list-style: none; margin: 20px 0 28px; flex: 1; }
.plan li { padding: 8px 0 8px 26px; position: relative; color: var(--sand-dim); font-size: 0.95rem; border-bottom: 1px dashed rgba(201,123,61,0.15); }
.plan li::before { content: "▸"; position: absolute; left: 0; color: var(--copper); }
.pricing-note { margin-top: 26px; font-size: 0.92rem; color: var(--sand-dim); max-width: 75ch; }
.pricing-note a { text-decoration: underline; }

/* ---------- contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; margin-top: 40px; }
.contact-info p { color: var(--sand-dim); margin-bottom: 16px; }
.contact-info .datum { font-family: var(--font-mono); font-size: 0.95rem; color: var(--sand); margin-bottom: 10px; }
.contact-info .datum span { color: var(--patina); display: block; font-size: 12px; letter-spacing: 0.18em; text-transform: uppercase; margin-bottom: 2px; }

form.contact { display: grid; gap: 16px; }
.field label { display: block; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.15em; text-transform: uppercase; color: var(--patina); margin-bottom: 6px; }
.field input, .field textarea, .field select {
  width: 100%;
  background: var(--rock-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 13px 14px;
  color: var(--sand);
  font-family: var(--font-body);
  font-size: 1rem;
}
.field textarea { min-height: 130px; resize: vertical; }
.consent { display: flex; gap: 10px; align-items: flex-start; font-size: 0.88rem; color: var(--sand-dim); }
.consent input { margin-top: 4px; }
.form-status { font-family: var(--font-mono); font-size: 0.9rem; color: var(--patina); min-height: 1.4em; }

/* ---------- footer ---------- */
footer.site {
  border-top: 1px solid var(--line);
  padding: 56px 0 36px;
  margin-top: 40px;
  background: var(--rock-2);
}
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 36px; }
.foot-grid h4 { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--patina); margin-bottom: 14px; }
.foot-grid ul { list-style: none; }
.foot-grid li { margin-bottom: 8px; }
.foot-grid a { color: var(--sand-dim); font-size: 0.93rem; }
.foot-grid a:hover { color: var(--copper); }
.foot-legal { margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--line); font-size: 0.85rem; color: var(--sand-dim); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* ---------- cookie banner ---------- */
.cookie-banner {
  position: fixed; bottom: 20px; left: 20px; right: 20px; z-index: 100;
  max-width: 640px; margin: 0 auto;
  background: var(--rock-3);
  border: 1px solid var(--copper);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.5);
  display: none;
}
.cookie-banner.show { display: block; }
.cookie-banner p { font-size: 0.92rem; color: var(--sand-dim); margin-bottom: 14px; }
.cookie-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.cookie-actions .btn { padding: 10px 20px; font-size: 0.9rem; }

/* ---------- legal pages ---------- */
.legal { max-width: 820px; margin: 0 auto; padding: 70px 24px 90px; }
.legal h1 { font-size: clamp(2rem, 4vw, 2.8rem); margin-bottom: 8px; }
.legal .updated { font-family: var(--font-mono); font-size: 0.85rem; color: var(--patina); margin-bottom: 36px; }
.legal h2 { font-size: 1.35rem; margin: 36px 0 12px; }
.legal p, .legal li { color: var(--sand-dim); margin-bottom: 12px; }
.legal ul { padding-left: 22px; margin-bottom: 14px; }
.legal table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 0.92rem; }
.legal th, .legal td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; color: var(--sand-dim); }
.legal th { color: var(--sand); font-family: var(--font-mono); font-size: 0.82rem; letter-spacing: 0.1em; text-transform: uppercase; }

/* ---------- motion ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn, .card { transition: none; }
}

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .hero-inner, .contact-grid { grid-template-columns: 1fr; }
  .cards, .pricing { grid-template-columns: 1fr 1fr; }
  .process { grid-template-columns: 1fr 1fr; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .cards, .pricing, .process, .foot-grid { grid-template-columns: 1fr; }
  .nav-links {
    display: none;
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; gap: 0;
    background: var(--rock-2);
    border-bottom: 1px solid var(--line);
    padding: 10px 0;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 24px; width: 100%; }
  .nav-toggle { display: block; }
  .stratum { padding: 72px 0; }
  .stratum::after { left: 130px; }
}