:root {
  --bg: #0f1115;
  --bg-soft: #191d25;
  --text: #f3f4f6;
  --muted: #c8ced8;
  --gold: #d4af37;
  --gold-soft: #f2df95;
  --line: #2a313d;
  --max: 1120px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #0d0f13 0%, #121720 45%, #0f1115 100%);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(8px);
  background: rgba(11, 14, 20, 0.8);
  border-bottom: 1px solid var(--line);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-mark {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  display: inline-grid;
  place-items: center;
  font-weight: 700;
  color: #111;
  background: var(--gold);
}

.brand-text {
  font-weight: 600;
  letter-spacing: 0.2px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.site-nav a {
  color: var(--muted);
  font-weight: 500;
}

.site-nav a:hover {
  color: var(--gold-soft);
}

.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  border-radius: 0.5rem;
  padding: 0.5rem 0.75rem;
}

.hero {
  padding: 5rem 0 3.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 2rem;
  align-items: start;
}

.eyebrow {
  display: inline-block;
  margin: 0;
  color: #111;
  background: var(--gold-soft);
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.9rem;
}

h1,
h2,
h3 {
  line-height: 1.2;
  margin: 0 0 1rem;
}

h1 {
  font-size: clamp(2rem, 4vw, 3.1rem);
  margin-top: 1rem;
}

.lead {
  color: var(--muted);
  max-width: 62ch;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1rem;
  border-radius: 0.55rem;
  font-weight: 600;
  border: 1px solid transparent;
}

.btn-primary {
  color: #141414;
  background: var(--gold);
}

.btn-primary:hover {
  background: #e0bf55;
}

.btn-ghost {
  color: var(--text);
  border-color: var(--line);
}

.btn-ghost:hover {
  border-color: var(--gold-soft);
  color: var(--gold-soft);
}

.hero-card {
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--bg-soft);
  padding: 1.25rem;
}

.hero-card ul {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

.section {
  padding: 3.5rem 0;
}

.section-alt {
  background: rgba(19, 24, 32, 0.55);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section p {
  color: var(--muted);
  max-width: 75ch;
}

.cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.card {
  border: 1px solid var(--line);
  border-radius: 0.9rem;
  background: var(--bg-soft);
  padding: 1rem;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.chips span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.45rem 0.8rem;
  color: var(--gold-soft);
  background: rgba(212, 175, 55, 0.08);
}

.mineral-gallery {
  margin-top: 1.4rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.mineral-photo {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 0.9rem;
  overflow: hidden;
  background: var(--bg-soft);
}

.mineral-photo img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  display: block;
}

.mineral-photo figcaption {
  padding: 0.75rem 0.9rem;
  color: var(--gold-soft);
  font-weight: 600;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 1.25rem;
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
}

.contact-list li {
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.contact-form {
  display: grid;
  gap: 0.6rem;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 0.9rem;
  padding: 1rem;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid #384153;
  background: #11161e;
  color: var(--text);
  border-radius: 0.5rem;
  padding: 0.6rem 0.7rem;
  font: inherit;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid rgba(212, 175, 55, 0.35);
  border-color: var(--gold);
}

.form-alert {
  display: none;
  border-radius: 0.5rem;
  padding: 0.6rem 0.7rem;
  font-size: 0.95rem;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 200ms ease, transform 200ms ease;
}

.form-alert.is-visible {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

.form-alert.is-success {
  border: 1px solid #3f7751;
  background: rgba(76, 175, 80, 0.16);
  color: #c6f6cf;
}

.form-alert.is-error {
  border: 1px solid #8b3f3f;
  background: rgba(244, 67, 54, 0.16);
  color: #ffd7d4;
}

.hp-field {
  position: absolute;
  left: -9999px;
  opacity: 0;
  pointer-events: none;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1rem 0;
}

.footer-wrap {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

.footer-wrap p {
  margin: 0;
  color: var(--muted);
}

@media (max-width: 900px) {
  .hero-grid,
  .contact-grid,
  .cards {
    grid-template-columns: 1fr;
  }

  .mineral-gallery {
    grid-template-columns: 1fr;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    right: 1rem;
    top: 72px;
    min-width: 210px;
    flex-direction: column;
    align-items: flex-start;
    border: 1px solid var(--line);
    background: #0f131c;
    border-radius: 0.7rem;
    padding: 0.8rem;
  }

  .site-nav.open {
    display: flex;
  }
}