:root {
  /* Brand Colors */
  --primary: #4F46E5;
  --primary-dark: #4338ca;
  --secondary: #0EA5E9;
  --accent: #F59E0B;
  --dark: #0F172A;
  --light: #F8FAFC;
  --white: #ffffff;
  --gray-100: #F1F5F9;
  --gray-200: #E2E8F0;
  --gray-500: #64748B;
  --gray-800: #1E293B;

  /* Spacing & Layout */
  --container-width: 1200px;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 20px rgba(79, 70, 229, 0.3);
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--dark);
  background-color: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5 {
  line-height: 1.2;
  font-weight: 700;
  margin-bottom: 1rem;
}

h1 {
  font-size: 3.5rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2.5rem;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.5rem;
}

p {
  margin-bottom: 1.5rem;
  color: var(--gray-500);
}

.text-gradient {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-center { text-align: center; }
.text-white { color: var(--white); }
.text-small { font-size: 0.875rem; }

/* Layout Utilities */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

.section {
  padding: 80px 0;
}

.grid {
  display: grid;
  gap: 32px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

@media (max-width: 768px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  h1 { font-size: 2.5rem; }
  h2 { font-size: 2rem; }
}

/* Components */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 32px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
  font-size: 1.125rem;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--white);
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(79, 70, 229, 0.6);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--gray-200);
  color: var(--dark);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--light);
}

.btn-block {
  width: 100%;
}

/* Cards */
.card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--gray-100);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.card-dark {
  background: linear-gradient(145deg, var(--dark) 0%, #1e293b 100%);
  color: var(--white);
  border: 1px solid var(--gray-800);
}

.card-dark p {
  color: var(--gray-200);
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  padding: 20px 0;
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--dark);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo span {
  color: var(--primary);
}

/* Badge */
.badge {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-accent {
  background: rgba(245, 158, 11, 0.1);
  color: var(--accent);
}

.badge-primary {
  background: rgba(79, 70, 229, 0.1);
  color: var(--primary);
}

/* Mockup Browser */
.mockup-browser {
  background: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  border: 1px solid var(--gray-200);
  height: 500px;
  display: flex;
  flex-direction: column;
}

.mockup-header {
  background: var(--gray-100);
  padding: 12px 16px;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  gap: 8px;
}

.mockup-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gray-500);
  opacity: 0.3;
}
.mockup-dot:nth-child(1) { background: #EF4444; opacity: 1; }
.mockup-dot:nth-child(2) { background: #F59E0B; opacity: 1; }
.mockup-dot:nth-child(3) { background: #10B981; opacity: 1; }

.mockup-body {
  flex: 1;
  background: var(--gray-100);
  padding: 20px;
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 20px;
}

.mockup-sidebar {
  background: var(--white);
  border-radius: 8px;
  height: 100%;
}
.mockup-content {
  background: var(--white);
  border-radius: 8px;
  height: 100%;
}

/* Placeholders */
.placeholder-icon {
  width: 48px;
  height: 48px;
  background: var(--gray-100);
  border-radius: 12px;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}

.placeholder-image {
  background-color: var(--gray-200);
  width: 100%;
  display: block;
}

.placeholder-image.hero-img {
  height: 500px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
}

.placeholder-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--gray-200);
  flex-shrink: 0;
}

/* Specific Sections */
.hero {
  padding-top: 60px;
  padding-bottom: 100px;
  background: radial-gradient(circle at top right, rgba(79, 70, 229, 0.1), transparent 40%);
}

.feature-list {
  list-style: none;
  margin-bottom: 24px;
}

.feature-list li {
  padding-left: 28px;
  position: relative;
  margin-bottom: 12px;
}

.feature-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 800;
}

.price-tag {
  font-size: 4rem;
  font-weight: 800;
  color: var(--dark);
  line-height: 1;
}

.price-sub {
  font-size: 1.25rem;
  color: var(--gray-500);
  text-decoration: line-through;
  margin-left: 12px;
}

.limited-banner {
  background: var(--dark);
  color: var(--white);
  text-align: center;
  padding: 10px;
  font-size: 0.875rem;
  font-weight: 600;
}

.avatar-stack {
  display: flex;
  margin-bottom: 16px;
}
.avatar-stack .placeholder-avatar {
  width: 40px;
  height: 40px;
  border: 2px solid var(--white);
  margin-right: -10px;
}

/* Form inputs for checkout */
.form-group {
  margin-bottom: 20px;
}
.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  font-size: 0.9rem;
}
.form-input {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-size: 1rem;
}
.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}