/* =============================================
   연비 계산기 전용 스타일
   ============================================= */

.calc-card {
  background: var(--glass-bg, rgba(255, 255, 255, 0.85));
  border: 1px solid var(--glass-border, rgba(224, 222, 214, 0.6));
  box-shadow: var(--glass-shadow, 0 4px 16px rgba(0, 0, 0, 0.06));
  border-radius: 16px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.calc-card h2 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary, #1e293b);
  margin-bottom: 1.25rem;
}

.calc-card h2::before {
  display: none;
}

.calc-card h2 i {
  color: var(--pastel-blue-1, #D97757);
}

/* Grid layouts */
.two-col {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 1rem;
}

.three-col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  margin-bottom: 1rem;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary, #475569);
}

/* Efficiency result */
#efficiency-result {
  margin-top: 1.25rem;
}

.efficiency-display {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: linear-gradient(135deg, #fff7ed, #fef3c7);
  border: 1px solid #fed7aa;
  border-radius: 12px;
}

html.dark .efficiency-display {
  background: linear-gradient(135deg, rgba(217, 119, 87, 0.15), rgba(251, 191, 36, 0.1));
  border-color: rgba(217, 119, 87, 0.3);
}

.efficiency-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--pastel-blue-1, #D97757);
  line-height: 1;
}

.efficiency-value span {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary, #64748b);
  margin-left: 0.25rem;
}

.efficiency-grade {
  display: inline-flex;
  align-items: center;
  padding: 0.375rem 0.875rem;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 700;
}

.grade-excellent {
  background: #dcfce7;
  color: #16a34a;
}

.grade-good {
  background: #dbeafe;
  color: #2563eb;
}

.grade-fair {
  background: #fef9c3;
  color: #ca8a04;
}

.grade-poor {
  background: #fee2e2;
  color: #dc2626;
}

html.dark .grade-excellent { background: rgba(22, 163, 74, 0.2); color: #4ade80; }
html.dark .grade-good { background: rgba(37, 99, 235, 0.2); color: #60a5fa; }
html.dark .grade-fair { background: rgba(202, 138, 4, 0.2); color: #fbbf24; }
html.dark .grade-poor { background: rgba(220, 38, 38, 0.2); color: #f87171; }

/* Monthly result grid */
#monthly-result,
#compare-result {
  margin-top: 1.25rem;
}

.result-grid-sm {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.result-sm-card {
  padding: 1rem;
  background: var(--pastel-cream, #FAF9F5);
  border: 1px solid var(--glass-border, #E0DED6);
  border-radius: 10px;
  text-align: center;
}

html.dark .result-sm-card {
  background: rgba(15, 23, 42, 0.6);
  border-color: rgba(51, 65, 85, 0.5);
}

.result-sm-label {
  font-size: 0.75rem;
  color: var(--text-secondary, #64748b);
  margin-bottom: 0.375rem;
  font-weight: 500;
}

.result-sm-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--pastel-blue-1, #D97757);
}

/* Compare result */
.compare-grid {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.compare-card {
  flex: 1;
  padding: 1.25rem;
  background: var(--pastel-cream, #FAF9F5);
  border: 2px solid var(--glass-border, #E0DED6);
  border-radius: 12px;
  text-align: center;
  transition: border-color 0.2s;
}

html.dark .compare-card {
  background: rgba(15, 23, 42, 0.6);
  border-color: rgba(51, 65, 85, 0.5);
}

.compare-card.winner {
  border-color: var(--pastel-blue-1, #D97757);
  background: #fff7ed;
}

html.dark .compare-card.winner {
  background: rgba(217, 119, 87, 0.12);
  border-color: #D97757;
}

.compare-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary, #64748b);
  margin-bottom: 0.5rem;
}

.compare-eff {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--pastel-blue-1, #D97757);
  margin-bottom: 0.375rem;
}

.compare-cost {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary, #1e293b);
}

.compare-vs {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-soft, #94a3b8);
  flex-shrink: 0;
}

.compare-diff {
  padding: 0.875rem 1.25rem;
  background: #fff7ed;
  border: 1px solid #fed7aa;
  border-radius: 10px;
  font-size: 0.95rem;
  color: var(--text-primary, #1e293b);
  text-align: center;
}

html.dark .compare-diff {
  background: rgba(217, 119, 87, 0.12);
  border-color: rgba(217, 119, 87, 0.3);
}

.compare-diff strong {
  color: var(--pastel-blue-1, #D97757);
}

/* Responsive */
@media (max-width: 768px) {
  .two-col,
  .three-col {
    grid-template-columns: 1fr;
  }

  .result-grid-sm {
    grid-template-columns: 1fr;
  }

  .compare-grid {
    flex-direction: column;
    gap: 0.75rem;
  }

  .compare-vs {
    transform: rotate(90deg);
  }
}

@media (max-width: 480px) {
  .calc-card {
    padding: 1.25rem 1rem;
  }

  .efficiency-display {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .efficiency-value {
    font-size: 2rem;
  }
}