/* EdgeIQ Labs Design System v1.0 */

:root {
  /* Colors */
  --bg: #0b0f14;
  --card: #121923;
  --card2: #0e1621;
  --text: #e8eef7;
  --muted: #9fb0c7;
  --accent: #3dd9ff;
  --border: #233142;
  --green: #3de19e;
  --ok: #70f0a8;
  --red: #ff6b6b;
  --yellow: #ffb347;
  --orange: #ff8c42;
  --purple: #b47aff;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Typography */
  --font-sans: Inter, system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;

  /* Borders & Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;

  /* Shadows */
  --shadow-card: 0 2px 12px rgba(0,0,0,0.3);
  --shadow-glow: 0 0 32px rgba(61,217,255,0.08);
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }

/* Container */
.container { max-width: 980px; margin: 0 auto; padding: 0 var(--space-lg); }
.container-wide { max-width: 1100px; margin: 0 auto; padding: 0 var(--space-lg); }

/* Navigation */
.nav-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11,15,20,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px var(--space-lg);
  max-width: 1100px;
  margin: 0 auto;
  gap: var(--space-md);
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.nav-logo-img { height: 48px; width: auto; border-radius: var(--radius-md); }
.nav-wordmark { display: flex; flex-direction: column; line-height: 1.1; }
.nav-brand-name { font-weight: 800; font-size: 1.1rem; letter-spacing: -0.02em; color: var(--text); }
.nav-brand-name span { color: var(--accent); }
.nav-brand-tag { font-size: 0.68rem; color: var(--muted); letter-spacing: 0.04em; text-transform: uppercase; margin-top: 2px; }
.nav-links { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.nav-links a {
  color: var(--muted);
  text-decoration: none;
  padding: 6px 12px;
  font-size: 0.92rem;
  border-radius: var(--radius-sm);
  transition: color 0.15s, background 0.15s;
}
.nav-links a:hover { color: var(--text); background: rgba(255,255,255,0.05); }
.nav-cta {
  background: var(--accent) !important;
  color: #071018 !important;
  font-weight: 700;
  padding: 8px 16px !important;
  border-radius: var(--radius-sm) !important;
  white-space: nowrap;
  flex-shrink: 0;
}
.nav-cta:hover { opacity: 0.88; }

/* Hero Section */
.hero { padding: 72px 0 56px; text-align: center; }
.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-md);
  line-height: 1.15;
}
.hero p {
  color: var(--muted);
  font-size: 1.1rem;
  max-width: 560px;
  margin: 0 auto;
}
.hero-badge {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: var(--space-md);
}
.hero-badge--accent {
  background: rgba(61,217,255,0.1);
  border: 1px solid rgba(61,217,255,0.25);
  color: var(--accent);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 1rem;
  font-family: inherit;
  cursor: pointer;
  border: none;
  transition: opacity 0.15s, transform 0.1s;
  text-decoration: none;
}
.btn:hover { opacity: 0.9; }
.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: #071018; }
.btn-secondary { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }
.btn-danger { background: var(--red); color: #fff; }
.btn-sm { padding: 8px 16px; font-size: 0.88rem; }
.btn-lg { padding: 16px 32px; font-size: 1.1rem; }

/* Cards */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}
.card--featured {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(61,217,255,0.15), var(--shadow-glow);
}

/* Grid Layouts */
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: var(--space-lg); }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--space-lg); }
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: var(--space-md); }

/* Section Spacing */
.section { padding: var(--space-3xl) 0; }
.section--compact { padding: var(--space-2xl) 0; }
.section-title {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
}
.section-subtitle {
  color: var(--muted);
  font-size: 1rem;
  margin-bottom: var(--space-xl);
}

/* Forms */
.input {
  width: 100%;
  padding: 14px 18px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s;
}
.input:focus { border-color: var(--accent); }
.input::placeholder { color: var(--muted); opacity: 0.6; }

/* FAQ Accordion */
.faq-item { border-bottom: 1px solid var(--border); }
.faq-question {
  padding: 16px 0;
  cursor: pointer;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1rem;
}
.faq-question::after { content: '+'; font-size: 1.2rem; color: var(--muted); transition: transform 0.2s; }
.faq-question.open::after { content: '−'; }
.faq-answer {
  display: none;
  padding: 0 0 16px;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.7;
}
.faq-answer.open { display: block; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
  color: var(--muted);
  font-size: 0.82rem;
}
.site-footer a { color: var(--muted); text-decoration: none; margin: 0 8px; }
.site-footer a:hover { color: var(--accent); }

/* Utilities */
.text-center { text-align: center; }
.text-muted { color: var(--muted); }
.text-accent { color: var(--accent); }
.text-green { color: var(--ok); }
.text-red { color: var(--red); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.hidden { display: none !important; }

/* Responsive */
@media (max-width: 720px) {
  .nav-links { display: none; }
  .hero h1 { font-size: 1.6rem; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding: var(--space-2xl) 0; }
}