:root {
  --bg-dark: #0a0a0b;
  --bg-panel: #161618;
  --bg-panel-hover: #1e1e21;
  --text-primary: #ffffff;
  --text-secondary: #9ca3af;
  --accent-red: #E60000;
  --accent-red-glow: rgba(230, 0, 0, 0.4);
  --accent-gold: #FFCC00;
  --accent-gold-glow: rgba(255, 204, 0, 0.4);
  --border-color: #2a2a2e;
  --glass-bg: rgba(22, 22, 24, 0.6);
  --glass-border: rgba(255, 255, 255, 0.08);
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', sans-serif;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg-dark);
  background-image: 
    radial-gradient(circle at 15% 50%, rgba(230, 0, 0, 0.05), transparent 25%),
    radial-gradient(circle at 85% 30%, rgba(255, 204, 0, 0.05), transparent 25%);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

h1, h2, h3, h4, .price-display {
  font-family: 'Orbitron', sans-serif;
  text-transform: uppercase;
  letter-spacing: 1px;
}

header {
  padding: 1rem 5%;
  border-bottom: 1px solid var(--border-color);
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.logo-container {
  display: flex;
  align-items: center;
  height: 40px;
}

.logo {
  height: 100%;
  width: auto;
  filter: drop-shadow(0 0 5px rgba(255,255,255,0.2));
}

.lang-switcher {
  display: flex;
  gap: 0.5rem;
}

.lang-btn {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  padding: 0.5rem 0.8rem;
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 700;
  font-family: 'Inter', sans-serif;
  color: var(--accent-gold);
  transition: all var(--transition-fast);
  min-width: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: -0.5px;
}

.lang-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
  color: #a1a1aa;
}

.lang-btn.active {
  background: rgba(230, 0, 0, 0.1);
  border: 1.5px solid var(--accent-red);
  color: #18181b;
  box-shadow: 0 0 12px var(--accent-red-glow);
  background-color: var(--accent-red);
}

.header-main {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

header h1 {
  font-size: 1.2rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
}

header h1 span {
  color: var(--accent-red);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.total-summary {
  text-align: right;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.total-summary .price-display {
  font-size: 2.2rem;
  color: var(--accent-gold);
  text-shadow: 
    0 0 15px var(--accent-gold-glow),
    0 0 30px var(--accent-gold-glow);
  font-weight: 900;
  line-height: 1;
  display: flex;
  align-items: baseline;
  gap: 0.3rem;
  font-family: 'Orbitron', sans-serif;
}

.total-summary .warranty-ticker {
  font-size: 0.8rem;
  color: #71717a;
  margin-top: 0.3rem;
  font-family: 'Inter', sans-serif;
  font-weight: 500;
}

.btn-reset {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid #3f3f46;
  color: #a1a1aa;
  padding: 0.6rem 1.2rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-family: 'Orbitron', sans-serif;
  transition: all var(--transition-fast);
  margin-bottom: -5px; /* Slight adjustment to align with price better */
}

.btn-reset:hover {
  border-color: rgba(255, 255, 255, 0.4);
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
}

/* Wizard Layout */
main {
  flex: 1;
  display: flex;
  justify-content: center;
  padding: 3rem 1rem;
  position: relative;
  overflow: hidden;
}

.wizard-container {
  width: 100%;
  max-width: 900px;
  position: relative;
}

.wizard-step {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  opacity: 0;
  visibility: hidden;
  transform: translateX(50px);
  transition: all var(--transition-smooth);
}

.wizard-step.active {
  position: relative;
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

.wizard-step.prev {
  transform: translateX(-50px);
}

/* Step Header */
.step-header {
  margin-bottom: 2.5rem;
  text-align: center;
}

.step-subtitle {
  color: var(--accent-red);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  display: block;
}

.step-title {
  font-size: 2.5rem;
  color: var(--text-primary);
}

/* Options Grid */
.options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

/* Section Grouping within a step */
.option-group {
  margin-bottom: 3rem;
  background: rgba(255,255,255,0.02);
  padding: 2rem;
  border-radius: 16px;
  border: 1px solid var(--border-color);
}

.option-group-title {
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

/* Custom Radio Cards */
.radio-card input {
  display: none;
}

.radio-card label {
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  background: var(--bg-panel);
  border: 2px solid var(--border-color);
  border-radius: 12px;
  cursor: pointer;
  height: 100%;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.radio-card label::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0) 100%);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.radio-card label:hover {
  background: var(--bg-panel-hover);
  border-color: #3f3f46;
  transform: translateY(-2px);
}

.radio-card label:hover::before {
  opacity: 1;
}

.radio-card input:checked + label {
  border-color: var(--accent-red);
  background: rgba(230, 0, 0, 0.05); /* very faint red */
  box-shadow: 0 4px 20px var(--accent-red-glow), inset 0 0 0 1px var(--accent-red);
}

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-family: 'Orbitron', sans-serif;
  color: var(--text-primary);
}

.card-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  flex-grow: 1;
}

.card-price {
  font-family: 'Orbitron', sans-serif;
  font-size: 1rem;
  color: var(--accent-gold);
  font-weight: 600;
  margin-top: auto;
}

.card-price .base-tag {
  color: var(--text-secondary);
  font-size: 0.8rem;
}

/* Premium Styling */
.radio-card.premium input:checked + label {
  border-color: var(--accent-gold);
  background: rgba(255, 204, 0, 0.05);
  box-shadow: 0 4px 20px var(--accent-gold-glow), inset 0 0 0 1px var(--accent-gold);
}

.radio-card.premium .card-title {
  color: var(--accent-gold);
  text-shadow: 0 0 5px rgba(255,204,0,0.3);
}

/* Alerts / Warnings */
.alert-warning {
  background: rgba(255, 204, 0, 0.1);
  border: 1px solid var(--accent-gold);
  border-radius: 8px;
  padding: 1.25rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 2rem;
  animation: pulseWarning 2s infinite;
  display: none; /* hidden by default */
}

@keyframes pulseWarning {
  0% { box-shadow: 0 0 0 0 var(--accent-gold-glow); }
  70% { box-shadow: 0 0 0 10px rgba(255,204,0,0); }
  100% { box-shadow: 0 0 0 0 rgba(255,204,0,0); }
}

.alert-icon {
  font-size: 1.5rem;
  color: var(--accent-gold);
}

.alert-content strong {
  display: block;
  color: var(--accent-gold);
  margin-bottom: 0.25rem;
  font-family: 'Orbitron', sans-serif;
}

.alert-content p {
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

/* Controls */
.wizard-controls {
  display: flex;
  justify-content: space-between;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.btn {
  padding: 0.8rem 2rem;
  border-radius: 30px;
  font-family: 'Orbitron', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-transform: uppercase;
  letter-spacing: 1px;
  border: none;
  outline: none;
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.05);
  border-color: #555;
}

.btn-primary {
  background: var(--accent-red);
  color: #fff;
  box-shadow: 0 4px 15px var(--accent-red-glow);
}

.btn-primary:hover {
  background: #cc0000;
  box-shadow: 0 6px 20px var(--accent-red-glow);
  transform: translateY(-2px);
}

.btn-gold {
  background: var(--accent-gold);
  color: #000;
  box-shadow: 0 4px 15px var(--accent-gold-glow);
}

.btn-gold:hover {
  background: #e6b800;
  box-shadow: 0 6px 20px var(--accent-gold-glow);
  transform: translateY(-2px);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* Checkout / Receipt Step */
.receipt {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2.5rem;
  max-width: 600px;
  margin: 0 auto 2rem auto;
}

.receipt-header {
  text-align: center;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px dashed #444;
}

.receipt-header h3 {
  color: var(--accent-red);
  font-size: 1.5rem;
}

.receipt-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.receipt-row .label {
  color: var(--text-secondary);
}

.receipt-row .value {
  font-weight: 500;
}

.receipt-total {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px dashed #444;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.receipt-total .label {
  font-size: 1.2rem;
  color: var(--accent-gold);
  font-family: 'Orbitron', sans-serif;
}

.receipt-total .value {
  font-size: 2rem;
  color: var(--text-primary);
  font-family: 'Orbitron', sans-serif;
  font-weight: bold;
}

/* User Info Form */
.user-form {
  max-width: 600px;
  margin: 0 auto;
}

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

.input-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.input-group input {
  width: 100%;
  padding: 1rem;
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 1rem;
  font-family: 'Inter', sans-serif;
  transition: border-color var(--transition-fast);
}

.input-group input:focus {
  outline: none;
  border-color: var(--accent-red);
  box-shadow: 0 0 0 2px rgba(230,0,0,0.1);
}

/* Ticker Animation Container */
.ticker-container {
  display: inline-block;
  overflow: hidden;
  vertical-align: bottom;
}

/* Media Queries */
@media (max-width: 768px) {
  .step-title {
    font-size: 2rem;
  }
  .options-grid {
    grid-template-columns: 1fr;
  }
  header h1 {
    font-size: 1.2rem;
  }
}