/* AYGN — Artificial Intelligence Yield GameFi Network | Standalone Plesk Stylesheet */
:root {
  --bg-primary: #F4F8FF;
  --bg-surface: #FFFFFF;
  --bg-dark: #0A1931;
  --text-primary: #0A1931;
  --text-secondary: #334E68;
  --text-muted: #627D98;
  --accent-blue: #0052FF;
  --accent-cyan: #0EA5E9;
  --accent-gold: #D97706;
  --border-light: #D9E8FC;
  --font-display: 'Syne', sans-serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  background-image:
    radial-gradient(circle at 15% 15%, rgba(0, 82, 255, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 85% 25%, rgba(14, 165, 233, 0.10) 0%, transparent 50%),
    linear-gradient(to right, rgba(2, 132, 199, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(2, 132, 199, 0.05) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 48px 48px, 48px 48px;
}

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Top Navigation Bar (Strict 3-Zone Contract) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-mark {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--bg-dark);
  text-decoration: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.925rem;
  font-weight: 600;
  transition: color 0.15s ease;
}

.nav-links a:hover {
  color: var(--accent-blue);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--accent-blue);
  color: #FFFFFF;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: transform 0.15s ease, background-color 0.15s ease;
}

.btn-primary:hover {
  background: #0040CC;
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: #FFFFFF;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.875rem;
  padding: 10px 20px;
  border-radius: 8px;
  border: 1px solid var(--border-light);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.btn-secondary:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
}

/* Sections */
section {
  padding: 80px 0;
  border-bottom: 1px solid var(--border-light);
}

.kicker {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent-blue);
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.12;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 68ch;
  margin-bottom: 40px;
}

/* Grid Systems */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  align-items: center;
}

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

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.grid-5 {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

/* Cards */
.surface-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: 14px;
  padding: 24px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.surface-card:hover {
  border-color: #93C5FD;
}

.visual-frame {
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--border-light);
  background: #0A1931;
}

.visual-frame img {
  width: 100%;
  height: auto;
  display: block;
}

.tabular {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* Filter Bar */
.filter-bar {
  display: inline-flex;
  gap: 6px;
  padding: 5px;
  background: #E6F0FD;
  border-radius: 10px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.filter-btn {
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 8px 16px;
  border-radius: 7px;
  cursor: pointer;
}

.filter-btn.active {
  background: #FFFFFF;
  color: var(--accent-blue);
}

/* Dark Security Terminal */
.terminal-card {
  background: #0B132B;
  color: #F8FAFC;
  border: 1px solid #1E3A8A;
  border-radius: 16px;
  padding: 28px;
}

.contract-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid #1E40AF;
  padding: 14px 18px;
  border-radius: 10px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.site-footer {
  background: #0A1931;
  color: #CBD5E1;
  padding: 56px 0;
}

@media (max-width: 992px) {
  .grid-2, .grid-3, .grid-4, .grid-5 {
    grid-template-columns: repeat(2, 1fr);
  }
  .nav-links {
    display: none;
  }
}

@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4, .grid-5 {
    grid-template-columns: 1fr;
  }
  section {
    padding: 56px 0;
  }
}