:root {
  --concrete-grey: #5c5e62;
  --dark-cement: #2f3032;
  --warning-red: #ff3333;
  --panel-bg: #44464a;
  
  --font-heavy: 'Archivo Black', sans-serif;
  --font-mono: 'Space Mono', monospace;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--dark-cement);
  background-image: radial-gradient(rgba(255, 255, 255, 0.05) 1.5px, transparent 1.5px);
  background-size: 30px 30px;
  color: #f5f5f5;
  font-family: var(--font-mono);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.concrete-container {
  width: 90%;
  max-width: 950px;
  padding: 50px 0;
}

/* Brutalist Header */
.concrete-header {
  border: 5px solid #000;
  background: var(--panel-bg);
  padding: 35px;
  margin-bottom: 40px;
  position: relative;
  box-shadow: 10px 10px 0px #000;
}

.warning-stripes {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 15px;
  background: repeating-linear-gradient(
    -45deg,
    #fcb900,
    #fcb900 10px,
    #000 10px,
    #000 20px
  );
  border-bottom: 3px solid #000;
}

.concrete-title {
  font-family: var(--font-heavy);
  font-size: clamp(3rem, 8vw, 6rem);
  margin: 15px 0 0 0;
  color: #fff;
  text-shadow: 6px 6px 0px #000;
  letter-spacing: -2px;
}

.concrete-subtitle {
  font-size: 0.85rem;
  letter-spacing: 2px;
  color: var(--warning-red);
  margin-top: 10px;
  font-weight: bold;
}

.hub-link {
  display: inline-block;
  color: #fff;
  background: #000;
  text-decoration: none;
  padding: 6px 14px;
  font-weight: bold;
  font-size: 0.85rem;
  border: 2px solid var(--warning-red);
  margin-top: 20px;
  transition: background-color 0.2s;
}

.hub-link:hover {
  background: var(--warning-red);
}

/* Panel Slabs Grid */
.concrete-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 35px;
  perspective: 1000px; /* Enable 3D perspective */
}

/* Structural Slab panels */
.slab-panel {
  background: var(--panel-bg);
  border: 5px solid #000;
  padding: 35px;
  box-shadow: 10px 10px 0px #000;
  position: relative;
  transition: transform 0.1s ease, box-shadow 0.1s ease;
  transform-style: preserve-3d;
}

.panel-tag {
  font-size: 0.75rem;
  color: var(--warning-red);
  border-bottom: 2px solid #000;
  padding-bottom: 6px;
  margin-bottom: 15px;
  font-weight: bold;
  letter-spacing: 1px;
}

.slab-panel h2 {
  font-family: var(--font-heavy);
  font-size: 1.5rem;
  margin-top: 0;
  color: #fff;
  letter-spacing: -1px;
}

.slab-panel p {
  font-size: 0.95rem;
  line-height: 1.6;
  color: #dfdfdf;
}

/* Red status warning indicator */
.status-indicator {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 25px;
  background: #000;
  padding: 8px 12px;
  border-left: 4px solid var(--warning-red);
}

.pulse-light {
  width: 10px;
  height: 10px;
  background-color: var(--warning-red);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--warning-red);
  animation: pulse 1s infinite alternate;
}

@keyframes pulse {
  0% { opacity: 0.3; }
  100% { opacity: 1; }
}

.status-label {
  font-size: 0.7rem;
  font-weight: bold;
}