/* ============================================
   EchoCtl — Global Styles
   Premium dark aesthetic, operational clarity
   ============================================ */

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

:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #0f1520;
  --bg-card: rgba(15, 21, 32, 0.7);
  --bg-card-hover: rgba(20, 28, 45, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --border-glass: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);
  --text-primary: #e8ecf4;
  --text-secondary: #8b95a8;
  --text-muted: #5a6478;
  --accent-teal: #22d3ee;
  --accent-teal-dim: rgba(34, 211, 238, 0.15);
  --accent-purple: #a855f7;
  --accent-purple-dim: rgba(168, 85, 247, 0.15);
  --gradient-cta: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #6366f1 100%);
  --gradient-teal: linear-gradient(135deg, #06b6d4 0%, #22d3ee 100%);
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 1200px;
  --nav-height: 72px;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--accent-teal); text-decoration: none; transition: color 0.2s; }
a:hover { color: #67e8f9; }

img { max-width: 100%; display: block; }
h1, h2, h3, h4, h5 { font-family: var(--font-heading); font-weight: 600; line-height: 1.2; letter-spacing: -0.02em; }

/* --- Utility --- */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.text-center { text-align: center; }
.text-teal { color: var(--accent-teal); }
.text-purple { color: var(--accent-purple); }
.text-muted { color: var(--text-secondary); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* --- Background Particles (canvas injected via JS) --- */
#particles-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* --- Navigation --- */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

.nav-logo svg { width: 32px; height: 32px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 8px;
  transition: all 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: var(--bg-glass);
}

/* Dropdown */
.nav-dropdown { position: relative; }
.nav-dropdown-trigger { cursor: pointer; display: flex; align-items: center; gap: 4px; background: none; border: none; font: inherit; }
.nav-dropdown-trigger::after {
  content: '';
  border: 4px solid transparent;
  border-top-color: var(--text-secondary);
  margin-top: 2px;
}
.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  padding: 8px;
  min-width: 200px;
  box-shadow: 0 16px 48px rgba(0,0,0,0.4);
}
.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown.open .nav-dropdown-menu { display: block; }
.nav-dropdown-menu a {
  display: block;
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 14px;
}
.nav-dropdown-menu a:hover { background: var(--bg-glass); }

/* Mobile nav */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 24px;
  cursor: pointer;
  padding: 8px;
}

@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0; right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-glass);
    flex-direction: column;
    padding: 16px;
    gap: 4px;
  }
  .nav-links.open { display: flex; }
  .nav-links a { width: 100%; padding: 12px 16px; }
  .nav-dropdown-menu {
    position: static;
    margin-top: 4px;
    box-shadow: none;
    border: none;
    background: rgba(255,255,255,0.02);
  }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s;
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-cta);
  color: white;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}
.btn-primary:hover {
  color: white;
  box-shadow: 0 6px 30px rgba(99, 102, 241, 0.5);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid var(--border-glass);
}
.btn-secondary:hover {
  color: var(--text-primary);
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
}

.btn-teal {
  background: var(--gradient-teal);
  color: var(--bg-primary);
  font-weight: 700;
}
.btn-teal:hover {
  color: var(--bg-primary);
  box-shadow: 0 6px 30px rgba(6, 182, 212, 0.4);
  transform: translateY(-1px);
}

.btn svg, .btn .arrow { width: 16px; height: 16px; }

/* --- Sections --- */
section {
  position: relative;
  z-index: 1;
  padding: 100px 0;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-teal);
  margin-bottom: 16px;
}

.section-label::before {
  content: '';
  width: 20px;
  height: 1px;
  background: var(--accent-teal);
}

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  margin-bottom: 16px;
  color: var(--text-primary);
}

.section-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 640px;
  line-height: 1.6;
}

.section-subtitle.centered { margin: 0 auto; }

/* --- Cards --- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  padding: 32px;
  transition: all 0.3s;
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 22px;
}

.card-icon.teal { background: var(--accent-teal-dim); color: var(--accent-teal); }
.card-icon.purple { background: var(--accent-purple-dim); color: var(--accent-purple); }

.card h3 { font-size: 20px; margin-bottom: 12px; }
.card p { color: var(--text-secondary); font-size: 15px; line-height: 1.6; }

/* --- Grid Layouts --- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

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

@media (max-width: 768px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

/* --- Hero --- */
.hero {
  padding: 160px 0 100px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero h1 {
  font-size: clamp(36px, 5.5vw, 60px);
  max-width: 800px;
  margin: 0 auto 20px;
  letter-spacing: -0.03em;
}

.hero .subtitle {
  font-size: clamp(17px, 2vw, 20px);
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 auto 40px;
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Product Cards (side-by-side) --- */
.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 20px;
  padding: 40px;
  transition: all 0.3s;
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.product-card .product-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  width: fit-content;
  margin-bottom: 20px;
}

.product-badge.teal { background: var(--accent-teal-dim); color: var(--accent-teal); }
.product-badge.purple { background: var(--accent-purple-dim); color: var(--accent-purple); }

.product-card h3 { font-size: 26px; margin-bottom: 12px; }
.product-card > p { color: var(--text-secondary); font-size: 16px; margin-bottom: 24px; }

.product-outcomes {
  list-style: none;
  margin-bottom: 32px;
  flex: 1;
}

.product-outcomes li {
  padding: 8px 0;
  color: var(--text-secondary);
  font-size: 15px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.product-outcomes li::before {
  content: '→';
  color: var(--accent-teal);
  font-weight: 600;
  flex-shrink: 0;
}

/* --- Steps / Workflow --- */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  counter-reset: step;
}

.step {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 14px;
  padding: 24px;
  text-align: center;
  counter-increment: step;
  position: relative;
}

.step::before {
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent-teal-dim);
  color: var(--accent-teal);
  font-size: 14px;
  font-weight: 700;
  margin: 0 auto 14px;
}

.step h4 { font-size: 15px; margin-bottom: 6px; }
.step p { font-size: 13px; color: var(--text-muted); }

/* --- Banner --- */
.banner {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 14px;
  padding: 20px 32px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: var(--text-secondary);
}

.banner .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-teal);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* --- Divider --- */
.divider {
  border: none;
  height: 1px;
  background: var(--border-glass);
  margin: 0;
}

/* --- Footer --- */
.site-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border-glass);
  padding: 60px 0 40px;
  background: rgba(10, 14, 23, 0.6);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p { color: var(--text-muted); font-size: 14px; margin-top: 12px; line-height: 1.5; }

.footer-col h4 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  color: var(--text-secondary);
  font-size: 14px;
  padding: 4px 0;
  transition: color 0.2s;
}

.footer-col a:hover { color: var(--text-primary); }

.footer-bottom {
  border-top: 1px solid var(--border-glass);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--text-muted);
}

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; gap: 12px; }
}

/* --- CTA Section --- */
.cta-section {
  text-align: center;
  background: linear-gradient(180deg, transparent 0%, rgba(99, 102, 241, 0.04) 50%, transparent 100%);
}

.cta-section h2 { font-size: clamp(28px, 4vw, 40px); margin-bottom: 16px; }
.cta-section p { color: var(--text-secondary); font-size: 18px; margin-bottom: 32px; }

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

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 15px;
  font-family: var(--font-body);
  transition: border-color 0.2s;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent-teal);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.1);
}

.form-textarea { min-height: 120px; resize: vertical; }

.form-select { appearance: none; cursor: pointer; }

/* --- Page-specific gradients --- */
.glow-teal::before {
  content: '';
  position: absolute;
  top: -100px; left: 50%; transform: translateX(-50%);
  width: 600px; height: 400px;
  background: radial-gradient(ellipse, rgba(34, 211, 238, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.glow-purple::before {
  content: '';
  position: absolute;
  top: -100px; left: 50%; transform: translateX(-50%);
  width: 600px; height: 400px;
  background: radial-gradient(ellipse, rgba(168, 85, 247, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

/* --- Animations --- */
@media (prefers-reduced-motion: no-preference) {
  .fade-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
  }
  .fade-up.visible {
    opacity: 1;
    transform: translateY(0);
  }
}