/* 
   vAdBlock V4 - Ultra Premium Minimalist SaaS Design System
   Developed for sophisticated aesthetics, maximum readability, and high conversion.
*/

:root {
  /* Core Colors - Neutral Monochrome */
  --bg-deep: #050505;
  --bg-surface: #0a0a0a;
  --bg-surface-hover: #111111;
  
  /* Text */
  --text-pure: #ffffff;
  --text-primary: #ededed;
  --text-muted: #888888;
  --text-dark: #000000;
  
  /* Subtle Accents (Monochrome and soft blue for interactivity) */
  --accent-soft: #2a2a2a;
  --accent-blue: #3b82f6; /* Only for primary actionable buttons */
  
  /* Borders */
  --border-subtle: rgba(255, 255, 255, 0.05);
  --border-strong: rgba(255, 255, 255, 0.12);
  --border-accent: rgba(255, 255, 255, 0.25);
  
  /* Structure */
  --max-width: 1080px; /* Tighter layout for sophisticated feel */
  --nav-height: 72px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 9999px;
  
  /* Animation */
  --transition-fast: 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-med: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   Base
   ========================================================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-deep);
  color: var(--text-primary);
  scroll-behavior: smooth;
}

body {
  line-height: 1.6;
  font-size: 16px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-image: radial-gradient(circle at top, rgba(255, 255, 255, 0.04) 0%, transparent 60%);
  background-repeat: no-repeat;
}

a {
  color: var(--text-pure);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--text-muted);
}

/* ==========================================================================
   Layout & Structure
   ========================================================================== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
  width: 100%;
}

main {
  flex: 1;
}

/* ==========================================================================
   Typography
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-pure);
  line-height: 1.15;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.text-gradient {
  /* Removing colorful gradient keywords, using a refined subtle silver gradient */
  background: linear-gradient(180deg, #ffffff 0%, #a0a0a0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-title {
  font-size: clamp(3rem, 5vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.25rem);
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 40px;
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.6;
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(5, 5, 5, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 1000;
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-pure);
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 24px;
  height: 24px;
  color: var(--text-pure);
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
}

.nav-links a:hover {
  color: var(--text-pure);
}

.nav-auth {
  display: flex;
  gap: 16px;
  align-items: center;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius-pill);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: 1px solid transparent;
  outline: none;
  letter-spacing: -0.01em;
}

.btn-primary {
  background: var(--text-pure);
  color: var(--bg-deep);
}

.btn-primary:hover {
  background: #e0e0e0;
  transform: scale(0.98);
}

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

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

.btn-outline {
  background: transparent;
  color: var(--text-pure);
  border: 1px solid var(--border-subtle);
}

.btn-outline:hover {
  border-color: var(--text-pure);
  background: rgba(255, 255, 255, 0.03);
}

/* ==========================================================================
   Components (Cards, Panels)
   ========================================================================== */
.glass-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: all var(--transition-med);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
}

.glass-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(255, 255, 255, 0.02), 0 8px 32px rgba(0, 0, 0, 0.4);
}

.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 32px;
  align-items: start;
}

/* Specific Feature Cards */
.feature-card {
  display: flex;
  flex-direction: column;
}

.feature-card .icon-wrapper {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.feature-card .icon-wrapper svg {
  width: 20px;
  height: 20px;
  color: var(--text-pure);
}

.feature-title {
  font-size: 1.1rem;
  margin-bottom: 12px;
  font-weight: 500;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Pricing */
.pricing-card {
  display: flex;
  flex-direction: column;
  padding: 24px;
}

.pricing-card.featured {
  background: #0d0d0d;
  border-color: var(--border-strong);
}

.price {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  margin: 12px 0;
  color: var(--text-pure);
}

.pricing-features {
  list-style: none;
  margin: 32px 0;
  flex: 1;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.pricing-features svg {
  width: 18px;
  height: 18px;
  color: var(--text-pure);
  flex-shrink: 0;
  margin-top: 2px;
}

/* ==========================================================================
   Stats & Tables
   ========================================================================== */
.stats-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid var(--border-subtle);
}

.stat-item {
  text-align: center;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--text-pure);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 8px;
}

.table-wrapper {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow-x: auto;
}

.premium-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.premium-table th, .premium-table td {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.premium-table th {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: rgba(255,255,255,0.02);
}

.premium-table tr:last-child td {
  border-bottom: none;
}

/* Forms */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-pure);
  font-size: 1rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.form-control:focus {
  border-color: var(--text-pure);
}

/* Accordion */
.accordion {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.accordion-item {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--bg-surface);
}
.accordion-header {
  padding: 24px;
  font-weight: 500;
  font-size: 1.05rem;
}
.accordion-content {
  padding: 0 24px 24px 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Responsive */
@media (max-width: 992px) {
  .bento-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none; /* simple mobile nav */
  }
  .bento-grid {
    grid-template-columns: 1fr;
  }
  .stats-row {
    flex-direction: column;
    gap: 32px;
  }
}
.pricing-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; } @media (max-width: 768px) { .pricing-grid { grid-template-columns: 1fr; } }