/* ============================================
   Grey Earth — Main Stylesheet (Mobile First)
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  --color-bg: #0d0d0d;
  --color-bg-alt: #1a1a1a;
  --color-surface: #222;
  --color-primary: #c8a24e;
  --color-primary-hover: #dbb85e;
  --color-text: #f0f0f0;
  --color-text-muted: #aaa;
  --color-border: #333;
  --font-heading: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --font-body: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --max-width: 1200px;
  --header-height: 64px;
  --radius: 8px;
  --transition: 0.3s ease;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-hover);
}

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 16px;
}

.text-center {
  text-align: center;
}

/* --- Buttons (mobile base) --- */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  text-align: center;
  width: 100%;
  max-width: 280px;
}

.btn-primary {
  background: var(--color-primary);
  color: #000;
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: #000;
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: #000;
}

/* --- Header (mobile base) --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(13, 13, 13, 0.95);
  backdrop-filter: blur(12px);
  z-index: 1000;
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.logo {
  display: flex;
  align-items: center;
}

.logo img {
  height: 72px;
  width: auto;
}

/* Mobile nav: hidden off-screen by default */
.main-nav {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 100%;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 24px;
  transform: translateY(-120%);
  transition: transform var(--transition);
  z-index: 999;
}

.main-nav.open {
  transform: translateY(0);
}

.main-nav ul {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.main-nav a {
  color: var(--color-text-muted);
  font-size: 1rem;
  font-weight: 500;
  padding: 8px 0;
  position: relative;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-text);
}

.main-nav a:hover::after,
.main-nav a.active::after {
  width: 100%;
}

/* Hide CTA button on mobile */
.header-cta {
  display: none;
}

/* Show hamburger on mobile */
.mobile-toggle {
  display: flex;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: all var(--transition);
}

/* --- Hero (mobile base) --- */
.hero {
  position: relative;
  min-height: 88vh;
  min-height: 88dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background:
    linear-gradient(rgba(13, 13, 13, 0.78), rgba(13, 13, 13, 0.88)),
    url('../assets/images/hero-mining-trucks.jpeg') center/cover;
  padding: calc(var(--header-height) + 24px) 0 40px;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(200, 162, 78, 0.18) 0%, transparent 72%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  padding: 0 8px;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 50px;
  background: rgba(200, 162, 78, 0.15);
  color: var(--color-primary);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 20px;
}

.hero-logo {
  max-width: 200px;
  height: auto;
  margin: 0 auto 24px;
  display: block;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
}

.hero p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: 28px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}

/* --- Page Hero (mobile base) --- */
.page-hero {
  padding: calc(var(--header-height) + 40px) 0 32px;
  text-align: center;
  background: var(--color-bg-alt);
}

.page-hero h1 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 10px;
}

.page-hero p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* --- Sections (mobile base) --- */
.section {
  padding: 56px 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section h2 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 12px;
  text-align: center;
}

.section-lead {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  max-width: 700px;
  margin: 0 auto 32px;
  text-align: center;
}

/* --- Intro --- */
.intro-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 32px;
}

.intro-copy {
  border-left: 3px solid var(--color-primary);
  padding: 20px 0 20px 20px;
}

.intro-copy h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.intro-copy p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.intro-media {
  overflow: hidden;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.intro-media img {
  width: 100%;
  aspect-ratio: 16/7;
  object-fit: cover;
}

.intro-media figcaption {
  padding: 12px 16px;
  color: var(--color-text-muted);
  font-size: 0.88rem;
}

/* --- Operations --- */
.operations-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.operation-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  padding: 0;
}

.operation-card-featured {
  border-color: rgba(200, 162, 78, 0.65);
  background: linear-gradient(180deg, rgba(200, 162, 78, 0.12), var(--color-surface));
}

.operation-card > img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.operation-kicker {
  display: inline-block;
  color: var(--color-primary);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 22px 22px 12px;
}

.operation-card h3 {
  font-size: 1.2rem;
  margin: 0 22px 10px;
}

.operation-card p {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  margin: 0 22px 20px;
}

.operation-card dl {
  display: grid;
  gap: 10px;
  margin: 0 22px 24px;
}

.operation-card dl div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid var(--color-border);
  padding-top: 10px;
}

.operation-card dt {
  color: var(--color-text-muted);
  font-size: 0.82rem;
}

.operation-card dd {
  color: var(--color-text);
  font-size: 0.88rem;
  font-weight: 700;
  text-align: right;
}

/* --- Stats (mobile: 1 col) --- */
.stats-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
}

.stat-number {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--color-primary);
}

.stat-suffix {
  font-size: 1rem;
  color: var(--color-primary);
  font-weight: 600;
}

.stat-card h3 {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 6px;
  font-weight: 500;
}

/* --- Location (mobile: 1 col) --- */
.location-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.location-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 24px;
}

.location-card h4 {
  font-size: 1.15rem;
  margin-bottom: 16px;
  color: var(--color-primary);
}

.csr-statement {
  margin: 0;
  padding: 22px 24px;
  border-left: 3px solid var(--color-primary);
  background: rgba(200, 162, 78, 0.08);
  color: var(--color-text-muted);
}

.csr-statement p {
  font-size: 0.98rem;
}

.csr-feature {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  max-width: 980px;
  margin: 0 auto 28px;
  align-items: stretch;
}

.csr-media {
  overflow: hidden;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.csr-media img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.csr-media figcaption {
  padding: 12px 16px;
  color: var(--color-text-muted);
  font-size: 0.88rem;
}

.check-list li {
  padding: 6px 0;
  padding-left: 28px;
  position: relative;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.check-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

/* --- Gallery (mobile: 1 col) --- */
.gallery {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.gallery figure {
  overflow: hidden;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.gallery img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.gallery figcaption {
  padding: 12px 14px;
  color: var(--color-text);
  font-size: 0.9rem;
  font-weight: 600;
}

.gallery-placeholder {
  grid-column: 1 / -1;
  text-align: center;
  padding: 40px 20px;
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px dashed var(--color-border);
  color: var(--color-text-muted);
}

/* --- Contact (mobile: 1 col) --- */
.contact-cta {
  background: var(--color-bg-alt);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}

.contact-form {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group.full-width {
  grid-column: 1 / -1;
}

.form-group label {
  font-size: 0.85rem;
  margin-bottom: 6px;
  color: var(--color-text-muted);
}

.form-group input,
.form-group textarea {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 12px 16px;
  color: var(--color-text);
  font-size: 1rem;
  font-family: var(--font-body);
  transition: border-color var(--transition);
  -webkit-appearance: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #666;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

.contact-info,
.contact-details {
  color: var(--color-text-muted);
}

.direct-contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  max-width: 900px;
  margin: 0 auto;
}

.contact-method {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  color: var(--color-text);
}

.contact-icon {
  width: 34px;
  height: 34px;
  margin-bottom: 8px;
  color: var(--color-primary);
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.contact-icon-fill path {
  fill: currentColor;
  stroke: none;
}

a.contact-method:hover {
  border-color: var(--color-primary);
  color: var(--color-text);
  transform: translateY(-2px);
}

.contact-method span {
  color: var(--color-primary);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.contact-method strong {
  font-size: 1.2rem;
  line-height: 1.35;
}

.contact-details h3 {
  color: var(--color-text);
  margin-bottom: 16px;
}

.contact-details p {
  margin-bottom: 14px;
  line-height: 1.8;
}

/* --- Services (mobile: 1 col) --- */
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: transform var(--transition), border-color var(--transition);
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-primary);
}

.service-icon {
  font-size: 2.2rem;
  margin-bottom: 12px;
}

.service-card h4 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.service-card p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* --- Features (mobile: 1 col) --- */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.feature {
  text-align: center;
  padding: 24px 16px;
}

.feature h4 {
  font-size: 1.05rem;
  margin-bottom: 8px;
  color: var(--color-primary);
}

.feature p {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* --- Team (mobile: 1 col) --- */
.team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 32px;
}

.team-card {
  text-align: center;
  padding: 28px 20px;
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.team-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--color-border);
  margin: 0 auto 14px;
}

.team-card h4 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.team-card p {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* --- Founder Quote --- */
.founder-quote {
  max-width: 700px;
  margin: 0 auto;
  font-style: italic;
  font-size: 1rem;
  color: var(--color-text-muted);
}

.founder-quote p {
  margin-bottom: 16px;
  line-height: 1.8;
}

.founder-quote footer {
  font-style: normal;
  color: var(--color-primary);
}

/* --- Map Placeholder --- */
.map-placeholder {
  width: 100%;
  height: 250px;
  background: var(--color-surface);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
}

/* --- Footer --- */
.site-footer {
  padding: 24px 0;
  text-align: center;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.8rem;
}