/* ============================================
   CSS Variables & Root Styles
   ============================================ */
:root {
  --primary-color: #b4cb6d;
  --primary-hover: #f4da62;
  --text-dark: #000;
  --text-light: #222;
  --border-gray: #999;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --transition-speed: 0.3s;
  --font-anton: 'Anton', sans-serif;
  --font-plex: 'IBM Plex Sans', sans-serif;
}

/* ============================================
   Global Styles
   ============================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  font-family: var(--font-plex);
  font-size: 18px;
  color: var(--text-dark);
  background-color: #f5f5f5;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3 {
  font-family: var(--font-anton);
  color: var(--text-light);
}

h1 {
  font-size: 55px;
  font-weight: 400;
  font-style: normal;
}

h2 {
  font-size: 40px;
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: 24px;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

p {
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
}

a {
  color: var(--primary-color);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ============================================
   Layout & Structure
   ============================================ */
.calculator {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: #fff;
}

.calculator__header {
  background-color: #fff;
  padding: var(--spacing-xl) var(--spacing-md);
  text-align: center;
  border-bottom: 1px solid #e0e0e0;
}

.calculator__title {
  margin: 0;
}

.calculator__progress-bar-container {
  width: 100%;
  height: 8px;
  background-color: #e0e0e0;
  border: none;
}

.calculator__progress-bar {
  height: 100%;
  background-color: var(--primary-color);
  width: 0%;
  transition: width var(--transition-speed) ease-in-out;
}

.calculator__main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl) var(--spacing-md);
}

.calculator__view {
  width: 100%;
  max-width: 800px;
  opacity: 0;
  transform: translateX(100%);
  transition: opacity var(--transition-speed) ease-in-out,
              transform var(--transition-speed) ease-in-out;
  position: absolute;
}

.calculator__view.active {
  opacity: 1;
  transform: translateX(0);
  position: relative;
}

.calculator__view.prev {
  transform: translateX(-100%);
}

.calculator__content {
  position: relative;
}

/* ============================================
   Buttons
   ============================================ */
.calculator__button,
.calculator__button-back {
  font-family: var(--font-plex);
  font-size: 18px;
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color var(--transition-speed) ease-in-out;
  font-weight: 600;
}

.calculator__button {
  background-color: var(--primary-color);
  color: var(--text-dark);
}

.calculator__button:hover {
  background-color: var(--primary-hover);
}

.calculator__button--secondary {
  background-color: #e0e0e0;
  color: var(--text-dark);
}

.calculator__button--secondary:hover {
  background-color: #d0d0d0;
}

.calculator__button-back {
  background-color: transparent;
  color: var(--text-dark);
  padding: 0;
  margin-bottom: var(--spacing-lg);
  font-size: 16px;
}

.calculator__button-back:hover {
  text-decoration: underline;
}

.calculator__button-group {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
  flex-wrap: wrap;
}

.calculator__button-group .calculator__button {
  flex: 1;
  min-width: 120px;
}

/* ============================================
   Forms
   ============================================ */
.calculator__form-group {
  margin-bottom: var(--spacing-lg);
}

.calculator__label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
}

.calculator__input {
  width: 100%;
  padding: var(--spacing-md);
  font-size: 18px;
  border: 1px solid var(--border-gray);
  border-radius: 4px;
  font-family: var(--font-plex);
}

.calculator__input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(180, 203, 109, 0.2);
}

.calculator__message-container {
  margin: var(--spacing-lg) 0;
  padding: var(--spacing-md);
  border-radius: 4px;
  min-height: 0;
}

.calculator__message-container.warning {
  background-color: #fff3cd;
  border: 1px solid #ffc107;
  color: #333;
}

/* ============================================
   Options Grid
   ============================================ */
.calculator__options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.calculator__option {
  cursor: pointer;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  padding: var(--spacing-md);
  transition: all var(--transition-speed) ease-in-out;
  text-align: center;
}

.calculator__option:hover {
  border-color: var(--primary-color);
  box-shadow: 0 2px 8px rgba(180, 203, 109, 0.3);
  transform: translateY(-2px);
}

.calculator__option-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 4px;
  margin-bottom: var(--spacing-md);
}

/* ============================================
   Table
   ============================================ */
.calculator__table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-lg) 0;
  border: 1px solid #ddd;
}

.calculator__table thead {
  background-color: #f9f9f9;
}

.calculator__table th,
.calculator__table td {
  padding: var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid #ddd;
}

.calculator__table th {
  font-weight: 600;
  background-color: #f5f5f5;
}

/* ============================================
   Summary & Messages
   ============================================ */
.calculator__important {
  background-color: #fffacd;
  border: 1px solid #ffd700;
  border-radius: 4px;
  padding: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

.calculator__summary {
  background-color: #f9f9f9;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.calculator__summary-item {
  display: flex;
  justify-content: space-between;
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid #e0e0e0;
}

.calculator__summary-item:last-child {
  border-bottom: none;
}

.calculator__summary-item strong {
  font-weight: 600;
}

.calculator__summary-note {
  font-size: 14px;
  color: #666;
  margin-top: var(--spacing-lg);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
  .calculator__header {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .calculator__title {
    font-size: 40px;
  }

  h2 {
    font-size: 28px;
  }

  h3 {
    font-size: 20px;
  }

  .calculator__main {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .calculator__button-group {
    flex-direction: column;
  }

  .calculator__button-group .calculator__button {
    width: 100%;
  }

  .calculator__options {
    grid-template-columns: 1fr;
  }

  .calculator__table {
    font-size: 14px;
  }

  .calculator__table th,
  .calculator__table td {
    padding: 8px;
  }
}

@media (max-width: 480px) {
  .calculator__header {
    padding: var(--spacing-md) var(--spacing-sm);
  }

  .calculator__title {
    font-size: 28px;
  }

  .calculator__main {
    padding: var(--spacing-md) var(--spacing-sm);
  }

  h2 {
    font-size: 24px;
  }

  h3 {
    font-size: 18px;
  }

  p {
    font-size: 16px;
  }

  .calculator__button,
  .calculator__button-back {
    font-size: 16px;
    padding: 12px var(--spacing-md);
  }

  .calculator__input {
    font-size: 16px;
    padding: 12px;
  }
}

/* ============================================
   Animations
   ============================================ */
@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideOutLeft {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(-100%);
  }
}

@keyframes progressFill {
  to {
    width: 100%;
  }
}

/* ============================================
   Loading & State
   ============================================ */
.calculator__button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.calculator__button:disabled:hover {
  background-color: var(--primary-color);
}

.calculator__button--full-width {
  width: 100%;
}

.calculator__lead-form {
  background-color: #f9f9f9;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.calculator__lead-form h3 {
  margin-top: 0;
  margin-bottom: var(--spacing-sm);
}

.calculator__lead-form p {
  margin-bottom: var(--spacing-lg);
  color: #666;
  font-size: 16px;
}

.calculator__form {
  margin-top: var(--spacing-md);
}

.calculator__success-message {
  background-color: #d4edda;
  border: 1px solid #28a745;
  border-radius: 8px;
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
  text-align: center;
}

.calculator__success-message h3 {
  color: #28a745;
  margin-top: 0;
}

.calculator__success-message p {
  margin-bottom: 0;
  color: #155724;
}

.calculator__estimate {
  background-color: #e8f5e9;
  border: 1px solid #c8e6c9;
  border-radius: 8px;
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.calculator__estimate h3 {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  color: #2e7d32;
}

#estimate-breakdown {
  margin-bottom: var(--spacing-md);
}

#estimate-breakdown p {
  margin: var(--spacing-sm) 0;
  display: flex;
  justify-content: space-between;
}

.calculator__estimate-total {
  font-size: 24px;
  font-weight: 600;
  padding-top: var(--spacing-md);
  border-top: 2px solid #c8e6c9;
  display: flex;
  justify-content: space-between;
}

.calculator__estimate-total span {
  color: #2e7d32;
}

.calculator__estimate-note {
  font-size: 14px;
  color: #666;
  text-align: right;
  margin-top: var(--spacing-sm);
  margin-bottom: 0;
}

.calculator__estimate-included {
  background-color: #f1f8e9;
  border: 1px solid #c8e6c9;
  border-radius: 4px;
  padding: var(--spacing-md);
  margin: var(--spacing-md) 0;
}

.calculator__estimate-included h4 {
  font-family: var(--font-plex);
  font-size: 16px;
  margin: 0 0 var(--spacing-sm) 0;
  color: #333;
}

.calculator__estimate-included ul {
  margin: 0;
  padding-left: var(--spacing-lg);
}

.calculator__estimate-included li {
  font-size: 14px;
  color: #555;
  margin-bottom: 4px;
}

.calculator__message-container.error {
  background-color: #f8d7da;
  border: 1px solid #dc3545;
  color: #721c24;
}

.calculator__button--loading {
  position: relative;
  pointer-events: none;
}

.calculator__button--loading::after {
  content: '';
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-left: 8px;
  vertical-align: middle;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}