/* ===========================================================
   TerraCore Geological Solutions — single-page theme
   Shared by the WordPress theme (front-page.php) and preview.html
   =========================================================== */

:root {
  --bg: #12161b;
  --bg-2: #1a1f26;
  --surface: #1f2530;
  --surface-2: #262d3a;
  --border: #2f3845;
  --text: #e7ebf0;
  --muted: #9aa6b6;
  --accent: #d9893f;      /* copper / earth amber */
  --accent-2: #6fae8e;    /* mineral green */
  --accent-soft: rgba(217, 137, 63, 0.12);
  --maxw: 1140px;
  --radius: 14px;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
  --font: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

h1, h2, h3 { line-height: 1.15; margin: 0 0 0.5em; font-weight: 700; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); }
p { margin: 0 0 1rem; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 110px 0; }
.section--alt { background: var(--bg-2); }

.eyebrow {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 14px;
}

.section-head { max-width: 680px; margin-bottom: 56px; }
.section-head p { color: var(--muted); font-size: 1.08rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.2s ease, box-shadow 0.2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--accent); color: #000; font-weight: 700; box-shadow: 0 10px 24px rgba(217, 137, 63, 0.3); }
.btn--primary:hover { background: #e59a52; }
.btn--ghost { border-color: var(--border); color: var(--text); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Header / Nav ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  transition: background 0.3s ease, box-shadow 0.3s ease, padding 0.3s ease;
  padding: 22px 0;
}
.site-header.scrolled {
  background: rgba(18, 22, 27, 0.85);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--border);
  padding: 14px 0;
}
.nav { display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 700; font-size: 1.18rem; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), #b56a2a);
  display: grid; place-items: center; color: #1b1206; font-weight: 800;
}
.brand small { color: var(--muted); font-weight: 500; font-size: 0.7rem; letter-spacing: 0.05em; display: block; }

.nav-links { display: flex; align-items: center; gap: 6px; list-style: none; margin: 0; padding: 0; }
.nav-links a:not(.btn) {
  padding: 8px 14px; border-radius: 8px; font-size: 0.93rem; color: var(--muted);
  transition: color 0.2s ease, background 0.2s ease;
}
.nav-links a:not(.btn):hover { color: var(--text); }
.nav-links a:not(.btn).active { color: var(--text); background: var(--accent-soft); }
.nav-cta { margin-left: 10px; }

.nav-toggle {
  display: none; background: none; border: 0; cursor: pointer; padding: 8px;
  flex-direction: column; gap: 5px;
}
.nav-toggle span { width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: 0.25s; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background:
    radial-gradient(900px 500px at 75% 15%, rgba(217, 137, 63, 0.16), transparent 60%),
    radial-gradient(700px 500px at 10% 80%, rgba(111, 174, 142, 0.12), transparent 55%),
    var(--bg);
}
.hero::after {
  content: "";
  position: absolute; inset: 0;
  background-image:
    repeating-linear-gradient(115deg, rgba(255,255,255,0.025) 0 2px, transparent 2px 26px);
  opacity: 0.6; pointer-events: none;
}
.hero-inner { position: relative; z-index: 2; max-width: 760px; padding-top: 60px; }
.hero h1 { font-size: clamp(2rem, 4.2vw, 3.1rem); margin-bottom: 18px; }
.hero h1 .grad {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-lead { font-size: clamp(1.05rem, 2vw, 1.3rem); color: var(--muted); max-width: 620px; margin-bottom: 32px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }

/* ---------- Stats strip ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat { text-align: center; padding: 28px 16px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.stat-num { font-size: clamp(2rem, 4vw, 2.8rem); font-weight: 800; color: var(--accent); }
.stat-label { color: var(--muted); font-size: 0.92rem; }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: center; }
.about-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 30px; box-shadow: var(--shadow);
}
.about-card h3 { color: var(--accent); font-size: 1rem; }
.value-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 16px; }
.value-list li { display: flex; gap: 13px; align-items: flex-start; }
.value-list .dot { margin-top: 9px; width: 8px; height: 8px; border-radius: 50%; background: var(--accent-2); flex: none; }
.value-list strong { display: block; }
.value-list span { color: var(--muted); font-size: 0.93rem; }

/* ---------- Services ---------- */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.service {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 30px; transition: transform 0.2s ease, border-color 0.2s ease;
}
.service:hover { transform: translateY(-6px); border-color: var(--accent); }
.service-icon {
  width: 52px; height: 52px; border-radius: 12px; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent); font-size: 1.5rem; margin-bottom: 18px;
}
.service h3 { font-size: 1.18rem; }
.service p { color: var(--muted); font-size: 0.96rem; margin: 0; }

/* ---------- Projects ---------- */
.project-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.project {
  position: relative; border-radius: var(--radius); overflow: hidden; min-height: 280px;
  display: flex; align-items: flex-end; padding: 26px;
  border: 1px solid var(--border);
  background-size: cover; background-position: center;
}
.project::before { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 30%, rgba(12,15,19,0.92)); }
.project > * { position: relative; z-index: 2; }
.project-tag { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--accent); font-weight: 600; }
.project h3 { font-size: 1.25rem; margin: 6px 0 4px; }
.project p { color: var(--muted); font-size: 0.9rem; margin: 0; }
.p1 { background-image: linear-gradient(135deg, #2d3a2f, #1a2a3a); }
.p2 { background-image: linear-gradient(135deg, #3a2d22, #241a12); }
.p3 { background-image: linear-gradient(135deg, #2a2d3a, #161a24); }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 56px; }
.contact-info p { color: var(--muted); }
.contact-list { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 18px; }
.contact-list li { display: flex; gap: 14px; align-items: center; }
.contact-list .ci-icon { width: 42px; height: 42px; border-radius: 10px; background: var(--surface-2); display: grid; place-items: center; color: var(--accent); flex: none; }
.contact-list span { color: var(--muted); font-size: 0.85rem; }
.contact-list strong { display: block; color: var(--text); }

.form { display: grid; gap: 16px; background: var(--surface); border: 1px solid var(--border); padding: 30px; border-radius: var(--radius); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field label { display: block; font-size: 0.85rem; color: var(--muted); margin-bottom: 6px; }
.field input, .field textarea {
  width: 100%; background: var(--bg); border: 1px solid var(--border); border-radius: 9px;
  padding: 12px 14px; color: var(--text); font-family: inherit; font-size: 0.95rem;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--accent); }
.field textarea { resize: vertical; min-height: 120px; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); padding: 36px 0; background: var(--bg-2); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.site-footer small { color: var(--muted); }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 36px; }
  .card-grid, .project-grid { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 4px;
    background: var(--bg-2); border-top: 1px solid var(--border);
    padding: 16px 24px; margin-top: 14px;
    transform: translateY(-12px); opacity: 0; pointer-events: none; transition: 0.25s;
  }
  .nav-links.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav-cta { margin: 6px 0 0; }
  .form-row { grid-template-columns: 1fr; }
  .section { padding: 80px 0; }
}
@media (max-width: 520px) {
  .card-grid, .project-grid { grid-template-columns: 1fr; }
}

/* ===========================================================
   Inner pages (page.php) — About / Services / Contact
   =========================================================== */
.page-hero {
  padding: 140px 0 40px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
}
.page-hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  margin: 0.2em 0 0;
}
.page-content {
  max-width: 760px;
  font-size: 1.05rem;
  color: var(--text);
}
.page-content h2 { margin-top: 1.6em; }
.page-content h3 { margin-top: 1.4em; color: var(--accent-2); }
.page-content ul { padding-left: 1.2em; color: var(--muted); }
.page-content li { margin: 0.4em 0; }
.page-content a { color: var(--accent); text-decoration: underline; }
.page-back { margin-top: 48px; }