.fuel-wrap {
  max-width: 600px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
  position: relative;
  z-index: 1;
}

.fuel-card {
  background: var(--surface);
  border: 0.5px solid var(--border-hover);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: 0 40px 80px rgba(0,0,0,0.4);
  margin-bottom: 1rem;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.field-hint {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 5px;
  line-height: 1.5;
}

#fuel-btn {
  width: 100%;
  background: var(--accent);
  border: none;
  border-radius: var(--radius-sm);
  color: var(--black);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: 'DM Sans', sans-serif;
  font-size: 16px;
  font-weight: 600;
  padding: 16px;
  transition: all 0.2s;
  margin-top: 0.5rem;
}

#fuel-btn:hover {
  background: #f0ff6b;
  transform: translateY(-1px);
}

#fuel-btn:disabled {
  background: var(--surface3);
  color: var(--text-muted);
  box-shadow: none;
  cursor: not-allowed;
  transform: none;
}

/* Results */
.fuel-result-card {
  animation: fadeUp 0.4s ease;
}

.cost-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 1.25rem;
}

.cost-tile {
  background: var(--surface2);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  text-align: center;
  transition: border-color 0.2s;
}

.cost-tile:first-child {
  border-color: rgba(232,255,71,0.2);
  background: var(--accent-dim);
}

.cost-tile-label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.7px;
  font-weight: 600;
  margin-bottom: 6px;
}

.cost-tile-value {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 26px;
  color: var(--white);
  letter-spacing: 0.5px;
  line-height: 1;
  margin-bottom: 2px;
}

.cost-tile:first-child .cost-tile-value { color: var(--accent); }

.cost-tile-sub {
  font-size: 11px;
  color: var(--text-muted);
}

.breakdown-box {
  background: var(--surface2);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
}

.breakdown-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 0;
  border-bottom: 0.5px solid var(--border);
  font-size: 13px;
}

.breakdown-row:last-child { border-bottom: none; }
.breakdown-label { color: var(--text-muted); }
.breakdown-value { color: var(--white); font-weight: 600; }

.tips-box {
  background: var(--accent-dim);
  border: 0.5px solid rgba(232,255,71,0.15);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.tips-box-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 0.75rem;
}

.tip-item {
  display: flex;
  gap: 8px;
  font-size: 13px;
  color: #ccc;
  line-height: 1.6;
  margin-bottom: 6px;
}

.tip-item:last-child { margin-bottom: 0; }

.reset-btn {
  width: 100%;
  background: transparent;
  border: 0.5px solid var(--border-hover);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  padding: 13px;
  transition: all 0.2s;
  margin-top: 0.5rem;
}

.reset-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

@media (max-width: 520px) {
  .two-col { grid-template-columns: 1fr; }
  .cost-grid { grid-template-columns: 1fr 1fr; }
  .header-nav { display: none; }
}
@media (max-width: 768px) {
  .cost-tile-wrap { grid-template-columns: 1fr; gap: 0.75rem; }
  .breakdown-table { font-size: 13px; }
  .efficiency-badge { font-size: 12px; padding: 4px 12px; }
}