:root {
  --primary-color: #007bff;
  --background-color: #f4f7f6;
  --card-background-color: #ffffff;
  --text-color: #333;
  --label-color: #555;
  --border-color: #ddd;
  --border-radius: 8px;
  --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
}

body {
  font-family: 'Noto Sans KR', sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  display: flex;
  justify-content: center;
  align-items: flex-start; /* Aligned to start to handle scrolling */
  padding: 1rem;
  overflow-y: auto; /* Enable scrolling for long content */
}

#root {
  width: 100%;
  height: auto; /* Allow height to grow */
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 2rem 0; /* Add some padding for scroll */
}

.container {
  width: 100%;
  max-width: 480px;
}

.calculator-card {
  background-color: var(--card-background-color);
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  padding: 2.5rem 2rem;
  width: 100%;
}

h1 {
  text-align: center;
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 2rem;
}

.method-selector {
  display: flex;
  gap: 0;
  margin-bottom: 2rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
}

.method-option {
  flex: 1;
  padding: 0.9rem 1rem;
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s;
  font-size: 1rem;
  text-align: center;
  font-weight: 500;
  user-select: none;
}

.method-option:first-child {
    border-right: 1px solid var(--border-color);
}

.method-option.selected {
  background-color: var(--primary-color);
  color: white;
}

.method-option:not(.selected):hover {
    background-color: #f0f0f0;
}

.manual-image-container {
  margin-bottom: 2rem;
  text-align: center;
  animation: fadeIn 0.5s ease-out;
}

.manual-image {
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group:last-of-type {
  margin-bottom: 0;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--label-color);
  margin-bottom: 0.5rem;
}

.form-group input[type="number"] {
  width: 100%;
  height: 48px;
  padding: 0.8rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input[type="number"]:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.15);
}

/* Hide number input spinners */
input[type=number]::-webkit-inner-spin-button, 
input[type=number]::-webkit-outer-spin-button { 
  -webkit-appearance: none; 
  margin: 0; 
}
input[type=number] {
  -moz-appearance: textfield;
}

.radio-group {
  display: flex;
  gap: 1rem;
}

.radio-label {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0.8rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s;
  font-size: 1rem;
  text-align: center;
  height: 48px;
}

.radio-label.selected {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: white;
  font-weight: 500;
}

.radio-label input[type="radio"] {
  display: none;
}

/* Stepper Input Styles */
.stepper-input {
  display: grid;
  grid-template-columns: 60px 1fr 60px;
  align-items: center;
  width: 100%;
  height: 48px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.stepper-input:focus-within {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.15);
}

.stepper-button {
  background-color: transparent;
  border: none;
  color: var(--primary-color);
  font-size: 1.75rem;
  font-weight: 300;
  cursor: pointer;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s;
  user-select: none;
}

.stepper-button:first-child {
  border-right: 1px solid var(--border-color);
}
.stepper-button:last-child {
  border-left: 1px solid var(--border-color);
}

.stepper-button:hover:not(:disabled) {
  background-color: rgba(0, 123, 255, 0.05);
}

.stepper-button:active:not(:disabled) {
  background-color: rgba(0, 123, 255, 0.1);
}

.stepper-button:disabled {
  color: #ccc;
  cursor: not-allowed;
  background-color: transparent;
}

.stepper-value {
  font-size: 1rem;
  font-weight: 500;
  text-align: center;
  user-select: none;
}

/* Divider */
.divider {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 2rem 0;
}

/* Results Section */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.results-container {
  animation: fadeIn 0.5s ease-out;
}

.results-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  text-align: center;
}

.results-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  background-color: var(--background-color);
  padding: 1.5rem;
  border-radius: var(--border-radius);
}

.result-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1rem;
}

.result-label-group {
  display: flex;
  align-items: center;
}

.result-label {
  color: var(--label-color);
  font-weight: 500;
}

.color-swatch {
  display: inline-block;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  margin-left: 0.5rem;
  border: 1px solid rgba(0, 0, 0, 0.1);
}

.result-value {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--primary-color);
}

.result-unit {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--label-color);
  margin-left: 0.25rem;
}

/* Visualizer Section */
.visualizer-wrapper {
  margin-top: 2.5rem;
  animation: fadeIn 0.5s ease-out;
}

.end-molding-controls {
  display: flex;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding: 0 0.5rem;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--label-color);
  cursor: pointer;
  user-select: none;
}

.checkbox-label input[type="checkbox"] {
  cursor: pointer;
  width: 16px;
  height: 16px;
  accent-color: var(--primary-color);
}

.checkbox-label input[type="checkbox"]:disabled {
  cursor: not-allowed;
}

.checkbox-label:has(input:disabled) {
  color: #ccc;
  cursor: not-allowed;
}

.visualizer-container {
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: var(--card-background-color);
  padding: 1.5rem 1rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
}

.visualizer-container svg {
  display: block;
  margin: 0 auto;
}

.wall-panel {
  fill: #F9F6F0; /* Soft Off-White */
}

.horizontal-molding {
  fill: #E1D5C9; /* Light Ash Wood */
  stroke: #4a4a4a;
  stroke-width: 1.5;
}

.vertical-molding {
  fill: #A88C7D; /* Medium Oak Wood */
  stroke: #4a4a4a;
  stroke-width: 1.5;
}

.furniture-center-line {
  stroke: red;
  stroke-width: 1.5;
  stroke-dasharray: 5, 5;
}

.dimension-line,
.dimension-tick {
  stroke: #4a4a4a;
  stroke-width: 0.75;
}

.perspective-lines line {
  stroke: #4a4a4a;
  stroke-width: 0.75;
  stroke-linecap: round;
}

.dimension-text {
  font-size: 18px;
  fill: #4a4a4a;
  font-family: 'Noto Sans KR', sans-serif;
  font-weight: 500;
}

.furniture-center-indicator .dimension-line,
.furniture-center-indicator .dimension-tick {
  stroke: red;
}

.furniture-center-indicator .dimension-text {
  fill: red;
}


@media (max-width: 480px) {
  body {
    align-items: flex-start;
    padding: 0;
  }
  #root {
    padding: 0;
  }
  .calculator-card {
    border-radius: 0;
    box-shadow: none;
    min-height: 100vh;
    padding: 2rem 1.5rem;
  }
  .results-grid {
    padding: 1rem;
  }
}