:root {
  --leather-dark: #20140b;
  --leather-light: #302014;
  --brass-color: #d4af37;
  --copper-color: #c88a3e;
  --paper-cream: #ecdcc4;
  
  --font-serif: 'Cinzel', serif;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--leather-dark);
  background-image: 
    radial-gradient(circle at 30% 30%, var(--leather-light) 0%, transparent 60%),
    linear-gradient(rgba(0,0,0,0.15) 1px, transparent 1px);
  background-size: 100% 100%, 15px 15px;
  color: var(--paper-cream);
  font-family: 'Courier New', Courier, monospace;
  font-weight: bold;
  line-height: 1.6;
}

.steampunk-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 60px 20px;
}

.steam-header {
  border-bottom: 3px double var(--brass-color);
  padding-bottom: 25px;
  margin-bottom: 45px;
  text-align: center;
}

.nav-back {
  display: inline-block;
  color: var(--brass-color);
  text-decoration: none;
  font-family: var(--font-serif);
  font-size: 0.85rem;
  letter-spacing: 2px;
  border: 1px solid var(--brass-color);
  padding: 5px 15px;
  background: rgba(0,0,0,0.4);
}

.nav-back:hover {
  background: var(--brass-color);
  color: var(--leather-dark);
}

.steam-title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 6vw, 4rem);
  letter-spacing: 4px;
  color: var(--brass-color);
  margin: 20px 0 10px 0;
  text-shadow: 2px 2px 0px #000;
}

.steam-subtitle {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  letter-spacing: 2px;
  color: var(--copper-color);
}

.steam-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 35px;
}

/* Brass Rivet Cards */
.steam-card {
  background-color: var(--leather-light);
  border: 2px solid var(--brass-color);
  border-radius: 4px;
  padding: 35px;
  box-shadow: inset 0 0 15px rgba(0,0,0,0.9), 0 15px 30px rgba(0,0,0,0.6);
  position: relative;
}

/* Rivet details on card corners */
.steam-card::before {
  content: "●";
  position: absolute;
  top: 5px;
  left: 8px;
  color: var(--brass-color);
  font-size: 10px;
  opacity: 0.7;
}

.steam-card::after {
  content: "●";
  position: absolute;
  top: 5px;
  right: 8px;
  color: var(--brass-color);
  font-size: 10px;
  opacity: 0.7;
}

.steam-card h2 {
  font-family: var(--font-serif);
  color: var(--brass-color);
  font-size: 1.3rem;
  letter-spacing: 2px;
  margin-top: 0;
}

.steam-card p {
  font-size: 0.9rem;
  opacity: 0.9;
}

/* Engine bay components */
.engine-bay {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 35px;
  margin: 25px 0;
  height: 120px;
}

/* Circular Steam Gauge */
.steam-gauge {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  border: 3px solid var(--brass-color);
  background: var(--paper-cream);
  position: relative;
  box-shadow: inset 0 2px 5px rgba(0,0,0,0.3);
}

.gauge-face {
  width: 100%;
  height: 100%;
  position: relative;
}

.gauge-hand {
  width: 2px;
  height: 28px;
  background-color: #ff3333;
  position: absolute;
  bottom: 50%;
  left: 50%;
  transform-origin: bottom center;
  transform: translateX(-50%) rotate(-60deg); /* -60deg to +60deg range */
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.gauge-label {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 9px;
  color: #666;
}

/* Cog gears */
.gears-link {
  display: flex;
  align-items: center;
  gap: 0; /* overlap cogs */
}

.gear-cog {
  color: var(--brass-color);
  line-height: 1;
  user-select: none;
  transition: transform 0.1s linear;
}

.gear-large {
  font-size: 6rem;
  margin-right: -25px;
}

.gear-small {
  font-size: 4rem;
  color: var(--copper-color);
}

/* Steam Valve button */
.valve-btn {
  width: 100%;
  background: linear-gradient(180deg, var(--brass-color) 0%, #a28220 100%);
  color: var(--leather-dark);
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 0.95rem;
  padding: 12px;
  border: 1px solid #000;
  cursor: pointer;
  box-shadow: 0 4px 6px rgba(0,0,0,0.4);
}

.valve-btn:active {
  transform: translateY(2px);
}

.steam-quote {
  font-style: italic;
  font-size: 1.15rem;
}