.container {
  max-width: 800px !important;
  margin: 20px auto !important;
  padding: 0 16px 40px !important;
}

/* ===== Header ===== */
.header {
  text-align: center !important;
  background: linear-gradient(135deg, #9ca1e2 0%, #4b85e6 50%, #9ca1e2 100%) !important;
  color: #ffffff !important;
  padding: 31px !important;
  border-radius: 15px !important;
  margin-bottom: 24px !important;
  box-shadow: 0 10px 30px rgba(75, 133, 230, 0.22) !important;
}

.header h1 {
  font-size: 2rem !important;
  font-weight: 700 !important;
  margin-bottom: 8px !important;
}

.subtitle {
  font-size: 0.95rem !important;
  opacity: 0.95 !important;
  max-width: 600px !important;
  margin: 0 auto !important;
}

/* ===== Form Card ===== */
.calculator-form {
  background: #ffffff !important;
  border: 1px solid #e3e8f4 !important;
  border-radius: 16px !important;
  padding: 24px !important;
  margin-bottom: 24px !important;
  box-shadow: 0 8px 28px rgba(75, 133, 230, 0.10) !important;
  overflow: hidden !important;
}

.step-header {
  background: #eef1ff !important;
  color: #273b70 !important;
  padding: 10px 16px !important;
  font-weight: 600 !important;
  font-size: 0.92rem !important;
  letter-spacing: 0.02em !important;
  border-left: 4px solid #4b85e6 !important;
  border-radius: 6px !important;
  margin: 16px 0 4px !important;
}

.step-header:first-child {
  margin-top: 0 !important;
}

.field-row {
  display: flex !important;
  align-items: flex-start !important;
  justify-content: space-between !important;
  gap: 20px !important;
  padding: 12px 0 !important;
  border-bottom: 1px solid #eef1f6 !important;
}

.field-row:last-of-type {
  border-bottom: none !important;
}

.field-label-col {
  flex: 1 1 55% !important;
}

.field-input-col {
  flex: 0 0 200px !important;
  display: flex !important;
  flex-direction: column !important;
  align-items: stretch !important;
}

.field-label {
  display: block !important;
  color: #243047 !important;
  font-weight: 600 !important;
  font-size: 0.9rem !important;
  margin-bottom: 4px !important;
}

.required {
  color: #ef4444 !important;
}

.helper-text {
  color: #64748b !important;
  font-size: 0.8rem !important;
  line-height: 1.35 !important;
}

.form-input {
  width: 100% !important;
  padding: 10px 12px !important;
  border: 1px solid #c8d2f0 !important;
  border-radius: 8px !important;
  background: #ffffff !important;
  color: #1f2937 !important;
  font-size: 0.9rem !important;
  font-family: inherit !important;
  transition: border-color 0.2s, box-shadow 0.2s !important;
}

.form-input:focus {
  border-color: #4b85e6 !important;
  box-shadow: 0 0 0 3px rgba(75, 133, 230, 0.15) !important;
  outline: none !important;
}

.error-text {
  color: #ef4444 !important;
  font-size: 0.78rem !important;
  margin-top: 4px !important;
  min-height: 0 !important;
  display: block !important;
}

/* ===== Buttons ===== */
.button-row {
  display: flex !important;
  gap: 12px !important;
  padding: 20px 0 0 !important;
  justify-content: center !important;
}

.btn {
  border: none !important;
  border-radius: 10px !important;
  padding: 11px 22px !important;
  font-size: 14px !important;
  font-weight: 600 !important;
  letter-spacing: 0.05em !important;
  cursor: pointer !important;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s, color 0.2s !important;
  font-family: inherit !important;
}

.btn-calculate {
  background: linear-gradient(135deg, #9ca1e2 0%, #4b85e6 50%, #9ca1e2 100%) !important;
  color: #ffffff !important;
  box-shadow: 0 4px 12px rgba(75, 133, 230, 0.24) !important;
}

.btn-calculate:hover {
  transform: translateY(-2px) !important;
  box-shadow: 0 8px 18px rgba(75, 133, 230, 0.30) !important;
}

.btn-reset {
  background: #ffffff !important;
  color: #273b70 !important;
  border: 1px solid #4b85e6 !important;
}

.btn-reset:hover {
  background: #eef1ff !important;
  transform: translateY(-2px) !important;
  box-shadow: 0 4px 12px rgba(75, 133, 230, 0.24) !important;
}

.btn:focus-visible {
  outline: 3px auto #4b85e6 !important;
  outline-offset: 2px !important;
}

/* ===== Results Section ===== */
.results-section {
  background: #ffffff !important;
  border: 1px solid #e3e8f4 !important;
  border-radius: 16px !important;
  padding: 24px !important;
  margin-top: 0 !important;
  color: #1f2937 !important;
  box-shadow: 0 8px 28px rgba(75, 133, 230, 0.10) !important;
}

.results-heading {
  text-align: center !important;
  font-size: 1.6rem !important;
  font-weight: 700 !important;
  color: #273b70 !important;
  margin-bottom: 12px !important;
}

.results-summary {
  text-align: center !important;
  font-size: 1.05rem !important;
  color: #243047 !important;
  margin-bottom: 6px !important;
}

.results-summary strong,
.results-summary .highlight {
  background: linear-gradient(135deg, #9ca1e2 0%, #4b85e6 50%, #9ca1e2 100%) !important;
  color: #ffffff !important;
  padding: 2px 10px !important;
  border-radius: 6px !important;
  font-weight: 700 !important;
}

.convention-note {
  text-align: center !important;
  font-size: 0.8rem !important;
  color: #64748b !important;
  margin-bottom: 12px !important;
}

.divider {
  border: none !important;
  border-top: 1px solid #e2e8f0 !important;
  margin: 16px 0 !important;
}

.explanatory-text {
  font-size: 0.88rem !important;
  line-height: 1.5 !important;
  color: #64748b !important;
  margin-bottom: 8px !important;
}

/* ===== Chart Card ===== */
.chart-card {
  background: #ffffff !important;
  border: 1px solid #e3e8f4 !important;
  border-radius: 12px !important;
  padding: 16px !important;
  margin-top: 16px !important;
  position: relative !important;
}

.chart-header {
  display: flex !important;
  justify-content: space-between !important;
  align-items: center !important;
  margin-bottom: 8px !important;
}

.chart-title {
  font-size: 1.1rem !important;
  font-weight: 700 !important;
  color: #1e293b !important;
}

/* ===== Chart Menu ===== */
.chart-menu-wrapper {
  position: relative !important;
}

.chart-menu-btn {
  background: #ffffff !important;
  border: 1px solid #c8d2f0 !important;
  border-radius: 8px !important;
  padding: 6px 10px !important;
  font-size: 1.1rem !important;
  cursor: pointer !important;
  color: #273b70 !important;
  transition: background 0.2s, border-color 0.2s !important;
}

.chart-menu-btn:hover {
  background: #eef1ff !important;
  border-color: #4b85e6 !important;
}

.chart-menu-btn:focus-visible {
  outline: 2px solid #4b85e6 !important;
  outline-offset: 1px !important;
}

.chart-menu {
  position: absolute !important;
  top: 100% !important;
  right: 0 !important;
  margin-top: 4px !important;
  background: #ffffff !important;
  border: 1px solid #c8d2f0 !important;
  border-radius: 10px !important;
  box-shadow: 0 8px 24px rgba(75, 133, 230, 0.15) !important;
  list-style: none !important;
  min-width: 200px !important;
  z-index: 100 !important;
  overflow: hidden !important;
  display: none !important;
}

.chart-menu.open {
  display: block !important;
}

.chart-menu li {
  padding: 10px 16px !important;
  font-size: 0.85rem !important;
  color: #1f2937 !important;
  cursor: pointer !important;
  transition: background 0.15s !important;
}

.chart-menu li:hover {
  background: #eef4ff !important;
}

.chart-menu li:focus-visible {
  outline: 2px solid #4b85e6 !important;
  outline-offset: -2px !important;
}

/* ===== Chart Container ===== */
.chart-container {
  position: relative !important;
  width: 100% !important;
  overflow: visible !important;
}

.savings-chart {
  display: block !important;
  width: 100% !important;
  height: auto !important;
}

.chart-tooltip {
  position: absolute !important;
  background: rgba(30, 41, 59, 0.92) !important;
  color: #fff !important;
  padding: 6px 10px !important;
  border-radius: 6px !important;
  font-size: 0.78rem !important;
  pointer-events: none !important;
  white-space: nowrap !important;
  z-index: 50 !important;
  line-height: 1.4 !important;
  transform: translate(-50%, -100%) !important;
  margin-top: -10px !important;
}

/* ===== Legend ===== */
.chart-legend {
  display: flex !important;
  flex-wrap: wrap !important;
  justify-content: center !important;
  gap: 16px !important;
  margin-top: 12px !important;
}

.legend-item {
  display: flex !important;
  align-items: center !important;
  gap: 6px !important;
  font-size: 0.82rem !important;
  color: #1f2937 !important;
}

.legend-color {
  width: 20px !important;
  height: 3px !important;
  border-radius: 2px !important;
}

.legend-dot {
  width: 7px !important;
  height: 7px !important;
  border-radius: 50% !important;
  display: inline-block !important;
}

/* ===== Table Toggle ===== */
.table-toggle-wrapper {
  text-align: center !important;
  margin-top: 20px !important;
}

.btn-toggle-table {
  background: #ffffff !important;
  color: #273b70 !important;
  border: 1px solid #4b85e6 !important;
  padding: 10px 28px !important;
  font-weight: 600 !important;
  letter-spacing: 0.05em !important;
  box-shadow: 0 4px 12px rgba(75, 133, 230, 0.24) !important;
}

.btn-toggle-table:hover {
  background: #eef1ff !important;
  color: #273b70 !important;
  transform: translateY(-2px) !important;
  box-shadow: 0 8px 18px rgba(75, 133, 230, 0.30) !important;
}

/* ===== Table ===== */
.table-wrapper {
  margin-top: 16px !important;
}

.table-heading {
  text-align: center !important;
  font-size: 1.05rem !important;
  font-weight: 700 !important;
  color: #273b70 !important;
  margin-bottom: 10px !important;
}

.table-scroll {
  overflow-x: auto !important;
  -webkit-overflow-scrolling: touch !important;
  border-radius: 8px !important;
}

.results-table {
  width: 100% !important;
  border-collapse: collapse !important;
  background: #ffffff !important;
  color: #1f2937 !important;
  font-size: 12px !important;
  border: 1px solid #e1e7f0 !important;
}

.results-table th {
  background: #eef1ff !important;
  color: #273b70 !important;
  font-weight: 600 !important;
  padding: 10px 8px !important;
  border: 1px solid #e1e7f0 !important;
}

.results-table td {
  background: #ffffff !important;
  color: #1f2937 !important;
  padding: 9px 8px !important;
  border: 1px solid #e1e7f0 !important;
  text-align: right !important;
  white-space: nowrap !important;
  transition: background 0.15s !important;
}

.results-table th:first-child,
.results-table td:first-child {
  text-align: left !important;
}

.results-table tbody tr:nth-child(even) td {
  background: #f7f9fe !important;
}

.results-table tbody tr:hover td {
  background: #eef4ff !important;
}

.results-table tbody tr:last-child {
  font-weight: 700 !important;
}

.results-table tbody tr:last-child td {
  background: #eef1ff !important;
}

/* ===== Responsive: Tablet ===== */
@media (max-width: 768px) {
  .header {
    padding: 22px 16px !important;
  }

  .header h1 {
    font-size: 1.6rem !important;
  }

  .field-row {
    flex-direction: column !important;
    gap: 8px !important;
  }

  .field-input-col {
    flex: 1 1 100% !important;
  }

  .field-label-col {
    flex: 1 1 100% !important;
  }

  .button-row {
    flex-direction: column !important;
  }

  .btn {
    width: 100% !important;
  }

  .results-heading {
    font-size: 1.35rem !important;
  }
}

/* ===== Responsive: Mobile ===== */
@media (max-width: 480px) {
  .container {
    padding: 0 8px 30px !important;
  }

  .header {
    padding: 18px 12px !important;
  }

  .header h1 {
    font-size: 1.35rem !important;
  }

  .subtitle {
    font-size: 0.82rem !important;
  }

  .calculator-form {
    padding: 16px !important;
  }

  .field-row {
    padding: 10px 0 !important;
  }

  .step-header {
    padding: 8px 12px !important;
    font-size: 0.88rem !important;
  }

  .results-section {
    padding: 16px !important;
  }

  .chart-card {
    padding: 10px !important;
  }

  .chart-menu {
    min-width: 170px !important;
    right: -10px !important;
  }

  .chart-legend {
    gap: 8px !important;
  }

  .legend-item {
    font-size: 0.75rem !important;
  }
}