:root {
  --primary: #4CAF50;
  --primary-dark: #2E7D32;
  --primary-light: #E8F5E9;
  --secondary: #81C784;
  --accent: #FFC107;
  --background: #f8f9fa;
  --surface: #ffffff;
  --text-main: #2c3e50;
  --text-light: #95a5a6;
  --border: #edf2f7;

  /* Modern Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 5px 15px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 15px 35px rgba(0, 0, 0, 0.1);
  --shadow-hover: 0 20px 40px rgba(76, 175, 80, 0.15);

  --radius: 16px;
  --transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--background);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-image: radial-gradient(circle at 10% 20%, rgb(242, 249, 244) 0%, rgb(255, 255, 255) 90%);
}

.container {
  max-width: 800px;
  margin: 4rem auto;
  padding: 0 1.5rem;
  width: 100%;
}

/* Header Animation */
.header {
  text-align: center;
  margin-bottom: 3rem;
  animation: fadeDown 0.8s ease-out;
}

.header h1 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  color: var(--text-main);
  letter-spacing: -0.5px;
}

.subtitle {
  color: var(--text-light);
  font-size: 1.1rem;
  font-weight: 400;
}

/* Card Utils */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transition: var(--transition);
  border: 1px solid rgba(0, 0, 0, 0.02);
  animation: scaleIn 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.card-header {
  padding: 2.5rem 2rem 1.5rem;
  text-align: center;
  border-bottom: 1px solid var(--border);
  background: #fff;
}

.card-content {
  padding: 2.5rem;
}

/* Wizard Steps Animation */
.step {
  display: none;
}

.step.active {
  display: block;
  animation: slideUpFade 0.5s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

@keyframes fadeDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.98) translateY(20px);
  }

  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

@keyframes slideUpFade {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Progress Bar */
.progress-container {
  margin-bottom: 2rem;
  position: relative;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.progress-bar {
  background-color: var(--border);
  border-radius: 999px;
  height: 6px;
  width: 100%;
  overflow: hidden;
}

.progress-fill {
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  height: 100%;
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  width: 20%;
  border-radius: 999px;
  box-shadow: 0 0 10px rgba(76, 175, 80, 0.4);
}

.step-indicators {
  display: flex;
  justify-content: space-between;
  margin-top: 1.5rem;
  padding: 0 5px;
}

.step-dot {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: var(--text-light);
  font-size: 0.9rem;
  transition: var(--transition);
  position: relative;
  z-index: 1;
}

.step-dot.active {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
  transform: scale(1.1);
  box-shadow: 0 0 0 4px rgba(76, 175, 80, 0.1);
}

.step-dot.completed {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
  transform: scale(1);
}

/* Form Elements */
.input-label {
  display: block;
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 2rem;
  text-align: center;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.hint-text {
  display: block;
  text-align: center;
  margin-top: 1.5rem;
  color: var(--text-light);
  font-size: 0.85rem;
}

/* Range Slider */
.range-container {
  text-align: center;
  padding: 2rem 0;
}

input[type=range] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 8px;
  border-radius: 99px;
  background: var(--border);
  outline: none;
  transition: opacity .2s;
}

input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--surface);
  border: 4px solid var(--primary);
  cursor: pointer;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
  transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

input[type=range]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.range-value-display {
  font-size: 3rem;
  font-weight: 800;
  color: var(--primary);
  margin-top: 1.5rem;
  font-feature-settings: "tnum";
}

/* Card Selectors */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.cards-grid.vertical {
  grid-template-columns: 1fr;
}

.card-selector {
  position: relative;
  cursor: pointer;
  perspective: 1000px;
}

.card-selector input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.card-selector-content {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  text-align: center;
  transition: var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
}

/* Stagger Animations for cards */
.cards-grid .card-selector:nth-child(1) {
  animation: slideUpFade 0.5s 0.1s both;
}

.cards-grid .card-selector:nth-child(2) {
  animation: slideUpFade 0.5s 0.2s both;
}

.cards-grid .card-selector:nth-child(3) {
  animation: slideUpFade 0.5s 0.3s both;
}

.cards-grid .card-selector:nth-child(4) {
  animation: slideUpFade 0.5s 0.4s both;
}

.card-selector:hover .card-selector-content {
  border-color: var(--secondary);
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.card-selector input:checked+.card-selector-content {
  border-color: var(--primary);
  background-color: var(--primary-light);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.card-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
  transition: transform 0.3s ease;
}

.card-selector:hover .card-icon {
  transform: scale(1.1) rotate(5deg);
}

.card-title {
  font-weight: 700;
  display: block;
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

.card-desc {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.4;
}

/* Horizontal Card */
.card-selector.horizontal .card-selector-content {
  flex-direction: row;
  text-align: left;
  justify-content: flex-start;
  padding: 1.5rem 2rem;
  gap: 1.5rem;
}

.card-selector.horizontal .card-icon {
  margin-bottom: 0;
  font-size: 2.5rem;
}

/* Checkbox Grid */
.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 1.5rem;
}

.checkbox-card {
  cursor: pointer;
  position: relative;
}

.checkbox-card input {
  position: absolute;
  opacity: 0;
}

.checkbox-content {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  box-shadow: var(--shadow-sm);
}

.checkbox-card input:checked+.checkbox-content {
  border-color: var(--primary);
  background-color: var(--primary-light);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.checkbox-content .icon {
  font-size: 2rem;
}

/* Modern Select */
.modern-select {
  width: 100%;
  padding: 1rem 1.5rem;
  border-radius: var(--radius);
  border: 2px solid var(--border);
  font-size: 1.1rem;
  font-family: inherit;
  color: var(--text-main);
  background: white;
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232c3e50' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 1.5rem center;
  background-size: 1.2em;
  cursor: pointer;
  transition: var(--transition);
}

.modern-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(76, 175, 80, 0.1);
}

/* Navigation Buttons */
.nav-buttons {
  display: flex;
  justify-content: space-between;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.btn-next,
.submit-btn {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  border: none;
  padding: 14px 35px;
  border-radius: 12px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  margin-left: auto;
  box-shadow: 0 4px 15px rgba(76, 175, 80, 0.3);
}

.btn-prev {
  background-color: transparent;
  color: var(--text-light);
  border: 2px solid transparent;
  padding: 14px 25px;
  border-radius: 12px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.btn-prev:hover {
  background-color: rgba(0, 0, 0, 0.03);
  color: var(--text-main);
}

.btn-next:hover,
.submit-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(76, 175, 80, 0.4);
}

.submit-btn {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Result Styles */
.result-card {
  margin-top: 2rem;
  text-align: center;
  padding: 1rem;
  animation: slideUpFade 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.result-header {
  margin-bottom: 3rem;
}

.result-header h2 {
  font-size: 2rem;
  color: var(--text-main);
  margin: 1rem 0;
}

.result-header svg {
  color: var(--primary);
  filter: drop-shadow(0 4px 6px rgba(76, 175, 80, 0.3));
}

.mower-recommendation-card {
  background: white;
  border-radius: var(--radius);
  padding: 2rem;
  margin-bottom: 2rem;
  border: 1px solid var(--border);
  transition: var(--transition);
  text-align: left;
  position: relative;
  overflow: visible;
  box-shadow: var(--shadow-md);
}

.mower-recommendation-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.rank-badge {
  position: absolute;
  top: -12px;
  left: 2rem;
  background: var(--accent);
  color: #333;
  padding: 6px 18px;
  border-radius: 30px;
  font-size: 0.85rem;
  font-weight: 800;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.rank-1 .rank-badge {
  background: linear-gradient(135deg, #FFD700, #FDB931);
  color: #5d4037;
}

.mower-header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 1.5rem;
  margin-bottom: 1.5rem;
}

.mower-model {
  font-size: 1.6rem;
  color: var(--text-main);
  font-weight: 700;
}

.mower-brand {
  color: var(--primary);
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  opacity: 0.9;
}

.mower-specs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1.5rem;
  background: var(--background);
  padding: 1.5rem;
  border-radius: 12px;
  margin: 1.5rem 0;
}

.spec-item {
  display: flex;
  flex-direction: column;
}

.spec-label {
  font-size: 0.75rem;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.spec-val {
  font-weight: 700;
  color: var(--text-main);
  font-size: 1.1rem;
}

.mower-price {
  font-size: 1.5rem;
  color: var(--primary-dark);
  font-weight: 800;
}

.product-link-btn {
  display: inline-block;
  width: 100%;
  text-align: center;
  padding: 1.2rem;
  background: var(--primary);
  color: white;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 700;
  margin-top: 1.5rem;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(76, 175, 80, 0.2);
}

.product-link-btn:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(76, 175, 80, 0.3);
}

.btn-restart {
  background: transparent;
  border: none;
  color: var(--text-light);
  text-decoration: none;
  cursor: pointer;
  margin-top: 1.5rem;
  font-weight: 600;
  transition: color 0.2s;
}

.btn-restart:hover {
  color: var(--text-main);
}

/* Responsiveness */
@media (max-width: 600px) {
  .container {
    margin: 1rem auto;
    padding: 0 1rem;
  }

  .header h1 {
    font-size: 1.75rem;
  }

  .card-content {
    padding: 1.5rem;
  }

  .range-value-display {
    font-size: 2.5rem;
  }

  .nav-buttons {
    flex-direction: column-reverse;
    gap: 1rem;
  }

  .btn-next,
  .btn-prev {
    width: 100%;
  }

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

  .step-dot {
    width: 28px;
    height: 28px;
    font-size: 0.8rem;
  }
}