:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #1a0a2e;
  --bg-surface: rgba(26, 10, 46, 0.6);
  --bg-surface-hover: rgba(26, 10, 46, 0.8);
  --text-primary: #ffffff;
  --text-secondary: #cccccc;
  --text-muted: #888888;
  --accent: #8000ff;
  --accent-hover: #6a00cc;
  --accent-glow: rgba(128, 0, 255, 0.3);
  --border: rgba(128, 0, 255, 0.2);
  --border-hover: rgba(128, 0, 255, 0.4);
  --radius: 12px;
  --radius-sm: 6px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 40px rgba(128, 0, 255, 0.25);
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
  font-size: 16px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  width: 100%;
}

/* Header & Navigation */
header {
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--border);
  background: var(--bg-surface);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
}

nav .logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  background: linear-gradient(135deg, var(--accent), #a855f7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

nav .nav-links {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

nav a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.2s;
  font-weight: 500;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  position: relative;
}

nav a:hover {
  color: var(--accent);
  background: rgba(128, 0, 255, 0.1);
}

nav a.active {
  color: var(--accent);
  background: rgba(128, 0, 255, 0.15);
}

nav a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0.75rem;
  right: 0.75rem;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

/* Main Content */
main {
  flex: 1;
  padding: var(--spacing-xl) 0;
}

/* Typography */
h1 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--accent), #a855f7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

h2 {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  line-height: 1.3;
}

h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  line-height: 1.4;
}

p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  font-size: 1.05rem;
}

/* Cards */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
}

.card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

.card-featured {
  border: 2px solid var(--accent);
  box-shadow: var(--shadow-glow);
  position: relative;
  overflow: hidden;
}

.card-featured::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), #a855f7);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.875rem 1.75rem;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #6a00cc);
  color: var(--text-primary);
  box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--accent-hover), #5a00aa);
  box-shadow: 0 6px 25px var(--accent-glow);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--bg-surface-hover);
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

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

/* Forms */
.form-group {
  margin-bottom: var(--spacing-md);
}

.label {
  display: block;
  margin-bottom: var(--spacing-xs);
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
}

.input-wrapper {
  position: relative;
}

.input {
  width: 100%;
  padding: 0.875rem 1rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 1rem;
  transition: all 0.2s;
  font-family: inherit;
}

.input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
  background: rgba(255, 255, 255, 0.08);
}

.input::placeholder {
  color: var(--text-muted);
}

.input-wrapper .password-toggle {
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.25rem;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.input-wrapper .password-toggle:hover {
  color: var(--accent);
}

.helper-text {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* Status Messages */
.status {
  margin-top: var(--spacing-md);
  padding: var(--spacing-sm);
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  font-size: 0.95rem;
}

.error {
  background: rgba(255, 0, 0, 0.1);
  border-color: rgba(255, 0, 0, 0.3);
  color: #ff6b6b;
}

.success {
  background: rgba(0, 255, 0, 0.1);
  border-color: rgba(0, 255, 0, 0.3);
  color: #51cf66;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 0.375rem 0.875rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-standard {
  background: rgba(136, 136, 136, 0.2);
  color: var(--text-muted);
  border: 1px solid rgba(136, 136, 136, 0.3);
}

.badge-performance {
  background: rgba(128, 0, 255, 0.2);
  color: var(--accent);
  border: 1px solid var(--accent-glow);
}

.badge-ultra {
  background: linear-gradient(135deg, rgba(128, 0, 255, 0.3), rgba(168, 85, 247, 0.3));
  color: #d4a5ff;
  border: 1px solid rgba(168, 85, 247, 0.4);
  box-shadow: 0 0 15px rgba(128, 0, 255, 0.2);
}

/* Hero Section */
.hero {
  text-align: center;
  padding: var(--spacing-2xl) 0;
  background: radial-gradient(circle at center, var(--accent-glow) 0%, transparent 70%);
}

.hero h1 {
  font-size: 4rem;
  margin-bottom: var(--spacing-md);
}

.hero p {
  font-size: 1.35rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto var(--spacing-lg);
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* Features Grid */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.feature-card {
  text-align: center;
}

.feature-card h3 {
  color: var(--accent);
  margin-bottom: var(--spacing-sm);
}

/* Pricing Cards */
.pricing {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.pricing-card {
  text-align: center;
  position: relative;
}

.pricing-card h3 {
  margin-bottom: var(--spacing-xs);
}

.pricing-card .price {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  margin: var(--spacing-sm) 0;
}

.pricing-card .price-sub {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: var(--spacing-md);
}

.pricing-card ul {
  list-style: none;
  text-align: left;
  margin: var(--spacing-md) 0;
}

.pricing-card ul li {
  padding: var(--spacing-xs) 0;
  color: var(--text-secondary);
  position: relative;
  padding-left: 1.5rem;
}

.pricing-card ul li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: bold;
}

.pricing-card .btn {
  width: 100%;
  margin-top: var(--spacing-md);
}

/* Skeleton Loading */
.skeleton {
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.05) 25%, rgba(255, 255, 255, 0.1) 50%, rgba(255, 255, 255, 0.05) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.skeleton-text {
  height: 1rem;
  margin-bottom: 0.5rem;
}

.skeleton-title {
  height: 2rem;
  margin-bottom: 1rem;
  width: 60%;
}

.skeleton-card {
  padding: var(--spacing-lg);
  min-height: 200px;
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--spacing-md);
  opacity: 0;
  animation: fadeIn 0.2s ease forwards;
}

@keyframes fadeIn {
  to { opacity: 1; }
}

.modal {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--spacing-lg);
  max-width: 500px;
  width: 100%;
  box-shadow: var(--shadow-glow);
  transform: scale(0.9);
  animation: scaleIn 0.2s ease forwards;
}

@keyframes scaleIn {
  to { transform: scale(1); }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
}

.modal-header h2 {
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}

.modal-close:hover {
  background: var(--bg-surface-hover);
  color: var(--text-primary);
}

.modal-body {
  margin-bottom: var(--spacing-md);
}

.modal-footer {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: flex-end;
}

/* Footer */
footer {
  padding: var(--spacing-lg) 0;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: auto;
}

/* Responsive */
@media (max-width: 768px) {
  h1 {
    font-size: 2.25rem;
  }
  
  .hero h1 {
    font-size: 2.75rem;
  }
  
  nav {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  nav .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .features,
  .pricing {
    grid-template-columns: 1fr;
  }
  
  .hero-cta {
    flex-direction: column;
  }
  
  .hero-cta .btn {
    width: 100%;
  }
}