:root {
  --warning-yellow: #fcb900;
  --hazard-black: #080808;
  --emergency-red: #ff3333;
  --slab-bg: #151515;
  
  --font-heavy: 'Archivo Black', sans-serif;
  --font-mono: 'Space Mono', monospace;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--hazard-black);
  background-image: repeating-linear-gradient(45deg, rgba(252, 185, 0, 0.02), rgba(252, 185, 0, 0.02) 20px, transparent 20px, transparent 40px);
  color: #fff;
  font-family: var(--font-mono);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  overflow-x: hidden;
}

/* Flashing Alarm screen overlay */
.alarm-siren-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--emergency-red);
  opacity: 0;
  z-index: 100;
  pointer-events: none;
  mix-blend-mode: overlay;
  transition: opacity 0.3s;
}

.alarm-siren-overlay.flashing {
  animation: flash-alarm 0.5s infinite alternate;
}

@keyframes flash-alarm {
  0% { opacity: 0; }
  100% { opacity: 0.65; }
}

.hazard-container {
  width: 90%;
  max-width: 950px;
  position: relative;
  z-index: 2;
  padding: 40px 0;
}

/* Alert header with stripe borders */
.hazard-header {
  border: 5px solid #000;
  background-color: var(--slab-bg);
  box-shadow: 8px 8px 0px #000;
  padding: 30px;
  margin-bottom: 40px;
  position: relative;
}

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

.nav-back {
  display: inline-block;
  color: #000;
  background: var(--warning-yellow);
  text-decoration: none;
  font-weight: bold;
  padding: 5px 12px;
  border: 3px solid #000;
  margin-top: 15px;
  box-shadow: 2px 2px 0px #000;
}
.nav-back:active {
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0px #000;
}

.hazard-title {
  font-family: var(--font-heavy);
  font-size: clamp(3rem, 7vw, 5rem);
  color: var(--warning-yellow);
  text-shadow: 5px 5px 0px #000;
  margin: 15px 0 0 0;
  letter-spacing: -1px;
}

.hazard-subtitle {
  font-size: 0.8rem;
  letter-spacing: 2px;
  color: var(--emergency-red);
  font-weight: bold;
  margin-top: 10px;
}

/* Warning slabs grid */
.hazard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 35px;
}

.hazard-card {
  background-color: var(--slab-bg);
  border: 5px solid #000;
  box-shadow: 8px 8px 0px #000;
  padding: 35px;
  position: relative;
  overflow: hidden;
}

.card-warning-stripe {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 10px;
  background: repeating-linear-gradient(
    0deg,
    var(--warning-yellow),
    var(--warning-yellow) 10px,
    #000 10px,
    #000 20px
  );
  border-right: 3px solid #000;
}

.hazard-card h2 {
  font-family: var(--font-heavy);
  font-size: 1.4rem;
  margin-top: 0;
  color: var(--warning-yellow);
  letter-spacing: -0.5px;
  padding-left: 10px;
}

.hazard-card p {
  font-size: 0.95rem;
  line-height: 1.6;
  padding-left: 10px;
}

/* Metrics stats details */
.metrics-table {
  width: 100%;
  margin-top: 20px;
  padding-left: 10px;
}

.metrics-table td {
  padding: 8px 0;
  font-size: 0.95rem;
}

.metrics-table td:first-child {
  font-weight: bold;
  color: #888;
}

.alert-text {
  color: var(--emergency-red);
  font-weight: bold;
  animation: pulse-red 1s infinite alternate;
}

@keyframes pulse-red {
  0% { text-shadow: 0 0 2px var(--emergency-red); }
  100% { text-shadow: 0 0 10px var(--emergency-red); }
}

/* Ventilator Fan widget */
.fan-widget {
  width: 80px;
  height: 80px;
  border: 4px solid #000;
  background-color: #222;
  border-radius: 50%;
  margin: 15px auto;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  box-shadow: inset 0 0 10px rgba(0,0,0,0.8);
}

.fan-blade {
  width: 60px;
  height: 60px;
  background: repeating-conic-gradient(
    #333 0% 12%,
    #000 12% 25%
  );
  border-radius: 50%;
  animation: spin-fan 4s linear infinite;
}

.fan-status {
  text-align: center;
  font-size: 0.8rem !important;
  color: #777;
}

.alarm-active .fan-blade {
  animation: spin-fan 0.3s linear infinite;
  background: repeating-conic-gradient(
    var(--warning-yellow) 0% 12%,
    #000 12% 25%
  );
}

@keyframes spin-fan {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Warning button triggers */
.siren-btn {
  font-family: var(--font-heavy);
  font-size: 1rem;
  background-color: var(--emergency-red);
  color: #fff;
  border: 4px solid #000;
  padding: 12px;
  width: 100%;
  cursor: pointer;
  box-shadow: 4px 4px 0px #000;
  transition: transform 0.1s, box-shadow 0.1s;
}

.siren-btn:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0px #000;
}