/* ==========================================================================
   Style 2: Heavy Equipment & Industrial Machinery
   Benchmark: Caterpillar, Komatsu, Sany Global, Atlas Copco
   Characteristics: Industrial Amber/Yellow, Iron Charcoal, Bold Engineering Typography
   ========================================================================== */

:root {
  --heavy-yellow: #f59e0b;       /* Caterpillar / Komatsu Safety Amber */
  --heavy-yellow-dark: #d97706;
  --heavy-yellow-light: #fef3c7;
  --iron-dark: #18181b;          /* Rugged Iron Charcoal */
  --iron-medium: #27272a;
  --iron-light: #3f3f46;
  --text-heavy: #18181b;
  --text-heavy-muted: #52525b;
  --bg-heavy-page: #f4f4f5;
  --bg-heavy-surface: #ffffff;
  --border-heavy: #d4d4d8;
  --border-heavy-dark: #a1a1aa;
  --radius-heavy: 2px;          /* Sharp, rugged corners */
}

body.theme-heavy {
  background-color: var(--bg-heavy-page);
  color: var(--text-heavy);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
}

/* Heavy Header */
.heavy-topbar {
  background-color: var(--iron-dark);
  color: #a1a1aa;
  font-size: 0.8rem;
  padding: 0.4rem 0;
  border-bottom: 2px solid var(--heavy-yellow);
}

.heavy-header {
  background-color: var(--bg-heavy-surface);
  border-bottom: 1px solid var(--border-heavy);
  position: sticky;
  top: 0;
  z-index: 900;
  padding: 0.85rem 0;
}

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

.heavy-brand-mark {
  background-color: var(--heavy-yellow);
  color: var(--iron-dark);
  font-weight: 900;
  font-size: 1.25rem;
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-heavy);
  letter-spacing: -0.04em;
}

.heavy-brand-title {
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--iron-dark);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  line-height: 1;
}

.heavy-brand-sub {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--heavy-yellow-dark);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* Heavy Nav */
.heavy-nav-item {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--iron-medium);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.5rem 0;
}

.heavy-nav-item:hover, .heavy-nav-item.active {
  color: var(--heavy-yellow-dark);
}

.btn-heavy-cta {
  background-color: var(--heavy-yellow);
  color: var(--iron-dark);
  font-size: 0.88rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.65rem 1.35rem;
  border-radius: var(--radius-heavy);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: background-color 0.15s ease;
}

.btn-heavy-cta:hover {
  background-color: var(--heavy-yellow-dark);
  color: #ffffff;
}

/* Heavy Hero */
.heavy-hero-wrap {
  background: linear-gradient(135deg, #18181b 0%, #27272a 100%);
  color: #ffffff;
  padding: 4.5rem 0;
  border-bottom: 4px solid var(--heavy-yellow);
  position: relative;
}

.heavy-hero-tag {
  background-color: var(--heavy-yellow);
  color: var(--iron-dark);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.25rem 0.65rem;
  display: inline-block;
  margin-bottom: 1rem;
}

.heavy-hero-title {
  font-size: 2.85rem;
  font-weight: 900;
  color: #ffffff;
  line-height: 1.15;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  margin-bottom: 1.25rem;
}

.heavy-hero-desc {
  font-size: 1.05rem;
  color: #d4d4d8;
  line-height: 1.6;
  margin-bottom: 2rem;
  max-width: 620px;
}

.heavy-stats-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 2.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 1.5rem;
}

.heavy-stat-digit {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--heavy-yellow);
  font-family: ui-monospace, monospace;
  line-height: 1;
}

.heavy-stat-label {
  font-size: 0.78rem;
  font-weight: 700;
  color: #a1a1aa;
  text-transform: uppercase;
  margin-top: 0.25rem;
}

/* Heavy Machine Card */
.heavy-machine-card {
  background-color: var(--bg-heavy-surface);
  border: 1px solid var(--border-heavy);
  border-radius: var(--radius-heavy);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.heavy-machine-card:hover {
  border-color: var(--heavy-yellow-dark);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12);
}

.heavy-machine-banner {
  height: 200px;
  background-color: #27272a;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
}

.heavy-power-badge {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background-color: var(--heavy-yellow);
  color: var(--iron-dark);
  font-weight: 900;
  font-size: 0.75rem;
  padding: 0.2rem 0.55rem;
  font-family: ui-monospace, monospace;
}

.heavy-machine-body {
  padding: 1.35rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.heavy-machine-model {
  font-family: ui-monospace, monospace;
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--heavy-yellow-dark);
  text-transform: uppercase;
}

.heavy-machine-name {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--iron-dark);
  margin: 0.25rem 0 0.85rem;
  line-height: 1.3;
}

.heavy-spec-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  padding: 0.35rem 0;
  border-bottom: 1px solid #f4f4f5;
}

.heavy-spec-name {
  color: var(--text-heavy-muted);
}

.heavy-spec-val {
  font-weight: 700;
  color: var(--iron-dark);
  font-family: ui-monospace, monospace;
}