/* ========================================
   ECHO PARTNERS — Global Styles
   Inspired by Supabase / Vercel aesthetic
   ======================================== */

:root {
  --bg: #09090b;
  --bg-elevated: #111113;
  --bg-card: #16161a;
  --border: #1e1e24;
  --border-hover: #2a2a32;
  --text: #fafafa;
  --text-secondary: #a0a0ab;
  --text-muted: #63636e;
  --accent: #6d5cff;
  --accent-hover: #8577ff;
  --accent-glow: rgba(109, 92, 255, 0.15);
  --green: #00c896;
  --blue: #3b82f6;
  --purple: #a855f7;
  --gradient: linear-gradient(135deg, #6d5cff 0%, #00c896 50%, #3b82f6 100%);
  --radius: 12px;
  --radius-lg: 20px;
  --radius-sm: 8px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 1200px;
  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 120px 0;
  position: relative;
}

/* ========================================
   ANIMATIONS
   ======================================== */

.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   NAVIGATION
   ======================================== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  transition: all var(--transition);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(9, 9, 11, 0.85);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
}

.logo-icon {
  width: 34px;
  height: 34px;
  background: var(--gradient);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 16px;
  color: #fff;
}

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

.nav-links a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color var(--transition);
  font-weight: 500;
}

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

.btn-nav {
  background: var(--bg-card) !important;
  color: var(--text) !important;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: all var(--transition) !important;
}

.btn-nav:hover {
  border-color: var(--border-hover) !important;
  background: var(--bg-elevated) !important;
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.mobile-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ========================================
   HERO
   ======================================== */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding-top: 80px;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 600px;
  background: radial-gradient(ellipse at center, rgba(109, 92, 255, 0.12) 0%, rgba(0, 200, 150, 0.05) 40%, transparent 70%);
  pointer-events: none;
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-content {
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--accent-glow);
  border: 1px solid rgba(109, 92, 255, 0.2);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent-hover);
  margin-bottom: 32px;
  letter-spacing: 0.02em;
}

.hero h1 {
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  max-width: 600px;
  margin: 0 auto 40px;
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 64px;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

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

.btn-primary:hover {
  background: #e0e0e0;
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  border-color: var(--border-hover);
  background: var(--bg-elevated);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 16px;
  border-radius: var(--radius);
}

/* Hero stats */
.hero-stats {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 40px;
}

.stat { text-align: center; }
.stat-num {
  display: block;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 4px;
}
.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}
.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* ========================================
   SECTION HEADERS
   ======================================== */

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-header p {
  max-width: 500px;
  margin: 0 auto;
  color: var(--text-secondary);
  font-size: 17px;
}

/* ========================================
   VENTURE CARDS
   ======================================== */

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

.venture-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  transition: all 0.3s ease;
  overflow: hidden;
}

.venture-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
}

.venture-card-glow {
  position: absolute;
  top: -80px;
  right: -80px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}

.venture-card:hover .venture-card-glow { opacity: 1; }
.venture-glow-blue { background: radial-gradient(circle, rgba(59, 130, 246, 0.12), transparent 70%); }
.venture-glow-green { background: radial-gradient(circle, rgba(0, 200, 150, 0.12), transparent 70%); }
.venture-glow-purple { background: radial-gradient(circle, rgba(168, 85, 247, 0.12), transparent 70%); }

.venture-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.venture-icon.blue { background: rgba(59, 130, 246, 0.1); color: var(--blue); }
.venture-icon.green { background: rgba(0, 200, 150, 0.1); color: var(--green); }
.venture-icon.purple { background: rgba(168, 85, 247, 0.1); color: var(--purple); }

.venture-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.venture-card p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 20px;
}

.venture-tags {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.venture-tags span {
  padding: 4px 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
}

.venture-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  transition: gap var(--transition);
}

.venture-link:hover { gap: 10px; }
.venture-link.muted { color: var(--text-muted); }

/* ========================================
   ABOUT
   ======================================== */

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.about-left h2 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.about-right p {
  color: var(--text-secondary);
  font-size: 17px;
  line-height: 1.8;
  margin-bottom: 20px;
}

.about-right p:last-child { margin-bottom: 0; }

/* ========================================
   APPROACH
   ======================================== */

.approach-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.approach-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all 0.3s ease;
}

.approach-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
}

.approach-num {
  font-size: 42px;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
  line-height: 1;
}

.approach-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
}

.approach-card p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
}

/* ========================================
   TECH
   ======================================== */

.tech-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.tech-pill {
  padding: 10px 22px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.tech-pill:hover {
  border-color: var(--accent);
  color: var(--text);
  background: var(--accent-glow);
}

/* ========================================
   CTA
   ======================================== */

.cta { padding-bottom: 80px; }

.cta-box {
  position: relative;
  text-align: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 80px 40px;
  overflow: hidden;
}

.cta-glow {
  position: absolute;
  top: -150px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse at center, rgba(109, 92, 255, 0.08), transparent 70%);
  pointer-events: none;
}

.cta-box h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  position: relative;
}

.cta-box p {
  color: var(--text-secondary);
  font-size: 17px;
  max-width: 500px;
  margin: 0 auto 36px;
  position: relative;
}

.cta-actions { position: relative; margin-bottom: 32px; }

.cta-links {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  position: relative;
}

.cta-links a {
  font-size: 14px;
  color: var(--text-muted);
  transition: color var(--transition);
  font-weight: 500;
}

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

.cta-dot {
  width: 3px;
  height: 3px;
  background: var(--text-muted);
  border-radius: 50%;
}

/* ========================================
   FOOTER
   ======================================== */

.footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
}

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

.footer-left {
  display: flex;
  align-items: center;
  gap: 24px;
}

.footer-left p {
  font-size: 13px;
  color: var(--text-muted);
}

.footer-right {
  display: flex;
  gap: 28px;
}

.footer-right a {
  font-size: 14px;
  color: var(--text-muted);
  transition: color var(--transition);
  font-weight: 500;
}

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

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 1024px) {
  .venture-grid { grid-template-columns: 1fr 1fr; }
  .approach-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { gap: 48px; }
}

@media (max-width: 768px) {
  .section { padding: 80px 0; }

  .nav-links {
    display: none;
    position: fixed;
    top: 66px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(9, 9, 11, 0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    gap: 24px;
    padding: 40px;
  }

  .nav-links.open { display: flex; }

  .nav-links a { font-size: 20px; color: var(--text); }

  .btn-nav {
    width: 100%;
    text-align: center;
    padding: 14px 20px !important;
    font-size: 16px !important;
  }

  .mobile-toggle { display: flex; }

  .hero h1 { font-size: clamp(2.4rem, 10vw, 3.5rem); }
  .hero-sub { font-size: 16px; }
  .hero-stats { gap: 24px; }
  .stat-num { font-size: 17px; }

  .venture-grid { grid-template-columns: 1fr; }
  .approach-grid { grid-template-columns: 1fr; }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .cta-box { padding: 48px 24px; }

  .footer-inner {
    flex-direction: column;
    gap: 24px;
    text-align: center;
  }

  .footer-left { flex-direction: column; gap: 12px; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: center; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .hero-stats { flex-direction: column; gap: 16px; }
  .stat-divider { width: 40px; height: 1px; }
}