/* ── Design Tokens ─────────────────────── */
:root {
  --color-primary: #2196F3;
  --color-primary-dark: #1976D2;
  --color-primary-light: #BBDEFB;
  --color-primary-50: #E3F2FD;
  --color-bg: #FFFFFF;
  --color-surface: #F8F9FA;
  --color-border: #E0E0E0;
  --color-text: #1A1A2E;
  --color-text-secondary: #5F6368;
  --color-success: #27AE60;
  --color-highlight: #FF9800;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --max-width: 1140px;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
}

/* ── Reset ─────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { font-family: var(--font-sans); color: var(--color-text); background: var(--color-bg); line-height: 1.6; }
img, svg { display: block; max-width: 100%; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-dark); }
ul, ol { list-style: none; }

/* ── Typography ─────────────────────── */
h1, h2, h3, h4 { line-height: 1.2; font-weight: 700; }
h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; color: var(--color-text); }
h3 { font-size: 1.25rem; }
.section-subtitle { color: var(--color-text-secondary); font-size: 1.125rem; max-width: 600px; margin: 0.75rem auto 0; }

/* ── Layout ─────────────────────── */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }
section { padding: 5rem 0; }
.text-center { text-align: center; }

.grid-2 { display: grid; grid-template-columns: 1fr; gap: 2rem; }
.grid-3 { display: grid; grid-template-columns: 1fr; gap: 2rem; }

/* ── Buttons ─────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 0.75rem 1.75rem; border-radius: var(--radius); font-weight: 600;
  font-size: 1rem; border: 2px solid transparent; cursor: pointer;
  transition: all 0.2s ease; text-decoration: none;
}
.btn-primary { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.btn-primary:hover { background: var(--color-primary-dark); border-color: var(--color-primary-dark); color: #fff; }
.btn-secondary { background: #fff; color: var(--color-primary); border-color: var(--color-primary); }
.btn-secondary:hover { background: var(--color-primary-50); color: var(--color-primary-dark); }
.btn-sm { padding: 0.5rem 1.25rem; font-size: 0.875rem; }
.btn-lg { padding: 1rem 2.25rem; font-size: 1.125rem; }
.btn-group { display: flex; flex-wrap: wrap; gap: 1rem; }

/* ── Cards ─────────────────────── */
.card {
  background: var(--color-bg); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 2rem;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.card-icon {
  width: 48px; height: 48px; border-radius: var(--radius);
  background: var(--color-primary-50); color: var(--color-primary);
  display: flex; align-items: center; justify-content: center; margin-bottom: 1rem;
}
.card-icon svg { width: 24px; height: 24px; }

/* ── Badge ─────────────────────── */
.badge {
  display: inline-block; padding: 0.2rem 0.6rem; border-radius: 999px;
  font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em;
}
.badge-pro { background: var(--color-primary-50); color: var(--color-primary); }
.badge-mx { background: #FFF3E0; color: #E65100; }
.badge-popular { background: var(--color-highlight); color: #fff; }

/* ── Site Header ─────────────────────── */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,0.95); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border); padding: 0.75rem 0;
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: 0.5rem; font-weight: 700; font-size: 1.125rem; color: var(--color-text); }
.logo:hover { color: var(--color-primary); }
.logo img { width: 32px; height: 32px; }
.nav-links { display: none; gap: 1.5rem; align-items: center; }
.nav-links a { color: var(--color-text-secondary); font-size: 0.9rem; font-weight: 500; }
.nav-links a:hover { color: var(--color-primary); }
.nav-toggle { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; background: none; border: none; cursor: pointer; color: var(--color-text); }
.nav-toggle svg { width: 24px; height: 24px; }
.mobile-nav {
  display: none; position: fixed; top: 57px; left: 0; right: 0;
  background: #fff; border-bottom: 1px solid var(--color-border);
  padding: 1rem 1.5rem; flex-direction: column; gap: 0.75rem;
}
.mobile-nav.open { display: flex; }
.mobile-nav a { color: var(--color-text); font-size: 1rem; padding: 0.5rem 0; }

/* ── Hero ─────────────────────── */
#hero {
  padding: 8rem 0 5rem;
  background: linear-gradient(135deg, var(--color-primary-50) 0%, #fff 50%, #E8F5E9 100%);
}
.hero-content { max-width: 720px; margin: 0 auto; text-align: center; }
.hero-content h1 { margin-bottom: 1.25rem; color: var(--color-text); }
.hero-content h1 span { color: var(--color-primary); }
.hero-subtitle { font-size: 1.2rem; color: var(--color-text-secondary); margin-bottom: 2rem; max-width: 560px; margin-left: auto; margin-right: auto; }
.hero-badges { display: flex; justify-content: center; gap: 1rem; margin-top: 2rem; }
.hero-badges a { opacity: 0.7; transition: opacity 0.2s; }
.hero-badges a:hover { opacity: 1; }
.hero-badges img { height: 40px; width: auto; }

/* ── Social Proof ─────────────────────── */
#social-proof {
  padding: 2rem 0; background: var(--color-surface);
  border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border);
}
#social-proof .container { display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 2rem; }
.proof-item { display: flex; align-items: center; gap: 0.5rem; color: var(--color-text-secondary); font-size: 0.9rem; }
.proof-item svg { width: 20px; height: 20px; color: var(--color-primary); }

/* ── Benefits ─────────────────────── */
#benefits { background: var(--color-bg); }
#benefits .card { text-align: center; }
#benefits .card h3 { margin-bottom: 0.5rem; }
#benefits .card p { color: var(--color-text-secondary); font-size: 0.95rem; }

/* ── Demo Video ─────────────────────── */
#demo { background: var(--color-surface); }
.video-facade {
  position: relative; max-width: 720px; margin: 2rem auto 0;
  aspect-ratio: 16/9; border-radius: var(--radius-lg); overflow: hidden;
  background: #1A1A2E; cursor: pointer; box-shadow: var(--shadow-lg);
}
.video-facade::after {
  content: ''; position: absolute; inset: 0;
  background: rgba(0,0,0,0.3); transition: background 0.2s;
}
.video-facade:hover::after { background: rgba(0,0,0,0.15); }
.play-btn {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  z-index: 1; width: 72px; height: 72px; border-radius: 50%;
  background: var(--color-primary); display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 20px rgba(33,150,243,0.4);
}
.play-btn svg { width: 28px; height: 28px; fill: #fff; margin-left: 3px; }
.video-placeholder-text {
  position: absolute; bottom: 1.5rem; left: 50%; transform: translateX(-50%);
  z-index: 1; color: rgba(255,255,255,0.7); font-size: 0.85rem;
}

/* ── How It Works ─────────────────────── */
#how-it-works { background: var(--color-bg); }
.steps { display: grid; grid-template-columns: 1fr; gap: 2rem; margin-top: 3rem; }
.step { text-align: center; position: relative; }
.step-number {
  width: 48px; height: 48px; border-radius: 50%; background: var(--color-primary);
  color: #fff; font-weight: 700; font-size: 1.25rem;
  display: flex; align-items: center; justify-content: center; margin: 0 auto 1rem;
}
.step h3 { margin-bottom: 0.5rem; }
.step p { color: var(--color-text-secondary); font-size: 0.95rem; max-width: 280px; margin: 0 auto; }
.step-connector { display: none; }

/* ── Features ─────────────────────── */
#features { background: var(--color-surface); }
.feature-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; margin-top: 3rem; }
.feature-item {
  display: flex; gap: 1rem; align-items: flex-start;
  padding: 1.25rem; background: var(--color-bg); border-radius: var(--radius);
  border: 1px solid var(--color-border);
}
.feature-icon {
  flex-shrink: 0; width: 40px; height: 40px; border-radius: var(--radius);
  background: var(--color-primary-50); color: var(--color-primary);
  display: flex; align-items: center; justify-content: center;
}
.feature-icon svg { width: 20px; height: 20px; }
.feature-text h3 { font-size: 1rem; margin-bottom: 0.25rem; display: flex; align-items: center; gap: 0.5rem; }
.feature-text p { color: var(--color-text-secondary); font-size: 0.9rem; }

/* ── Pricing ─────────────────────── */
#pricing { background: var(--color-bg); }
.pricing-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; margin-top: 3rem; }
.pricing-card {
  background: var(--color-bg); border: 2px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 2rem; text-align: center;
  position: relative; display: flex; flex-direction: column;
}
.pricing-card.popular { border-color: var(--color-primary); box-shadow: var(--shadow-md); }
.pricing-card.popular::before {
  content: 'Most Popular'; position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: var(--color-highlight); color: #fff; padding: 0.25rem 1rem;
  border-radius: 999px; font-size: 0.75rem; font-weight: 700; text-transform: uppercase;
}
.pricing-name { font-size: 1.25rem; font-weight: 700; margin-bottom: 0.5rem; }
.pricing-price { font-size: 2.5rem; font-weight: 700; color: var(--color-text); margin-bottom: 0.25rem; }
.pricing-price span { font-size: 1rem; font-weight: 400; color: var(--color-text-secondary); }
.pricing-desc { color: var(--color-text-secondary); font-size: 0.9rem; margin-bottom: 1.5rem; }
.pricing-features { text-align: left; margin-bottom: 2rem; flex-grow: 1; }
.pricing-features li {
  padding: 0.4rem 0; font-size: 0.9rem; display: flex; align-items: center; gap: 0.5rem;
}
.pricing-features li::before { content: '✓'; color: var(--color-success); font-weight: 700; }
.pricing-note { text-align: center; margin-top: 2rem; color: var(--color-text-secondary); font-size: 1.1rem; font-weight: 600; }

/* ── Security ─────────────────────── */
#security { background: var(--color-surface); }
.security-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; margin-top: 3rem; }
.security-item { display: flex; gap: 1rem; align-items: flex-start; }
.security-icon {
  flex-shrink: 0; width: 48px; height: 48px; border-radius: 50%;
  background: var(--color-primary-50); color: var(--color-primary);
  display: flex; align-items: center; justify-content: center;
}
.security-icon svg { width: 24px; height: 24px; }
.security-item h3 { font-size: 1.05rem; margin-bottom: 0.25rem; }
.security-item p { color: var(--color-text-secondary); font-size: 0.9rem; }

/* ── FAQ ─────────────────────── */
#faq { background: var(--color-bg); }
.faq-list { max-width: 720px; margin: 2.5rem auto 0; }
.faq-item {
  border-bottom: 1px solid var(--color-border);
}
.faq-item summary {
  padding: 1.25rem 0; font-weight: 600; font-size: 1.05rem; cursor: pointer;
  list-style: none; display: flex; justify-content: space-between; align-items: center;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+'; font-size: 1.5rem; font-weight: 300; color: var(--color-text-secondary);
  transition: transform 0.2s;
}
.faq-item[open] summary::after { content: '−'; }
.faq-item .faq-answer { padding: 0 0 1.25rem; color: var(--color-text-secondary); line-height: 1.7; }

/* ── Final CTA ─────────────────────── */
#final-cta {
  padding: 5rem 0; text-align: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
}
#final-cta h2 { color: #fff; margin-bottom: 1rem; }
#final-cta p { color: rgba(255,255,255,0.85); font-size: 1.1rem; margin-bottom: 2rem; max-width: 500px; margin-left: auto; margin-right: auto; }
#final-cta .btn-primary { background: #fff; color: var(--color-primary); border-color: #fff; }
#final-cta .btn-primary:hover { background: var(--color-primary-50); border-color: var(--color-primary-50); }
#final-cta .btn-secondary { background: transparent; color: #fff; border-color: rgba(255,255,255,0.5); }
#final-cta .btn-secondary:hover { background: rgba(255,255,255,0.1); border-color: #fff; }

/* ── Footer ─────────────────────── */
.site-footer {
  padding: 3rem 0 2rem; background: var(--color-text); color: rgba(255,255,255,0.7);
  font-size: 0.9rem;
}
.footer-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; margin-bottom: 2rem; }
.footer-brand .logo { color: #fff; margin-bottom: 0.75rem; }
.footer-brand p { color: rgba(255,255,255,0.6); font-size: 0.85rem; max-width: 300px; }
.footer-links h4 { color: #fff; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 0.75rem; }
.footer-links a { display: block; color: rgba(255,255,255,0.6); padding: 0.25rem 0; font-size: 0.85rem; }
.footer-links a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 1.5rem; text-align: center; font-size: 0.8rem; color: rgba(255,255,255,0.4); }

/* ── Responsive ─────────────────────── */
@media (min-width: 640px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .security-grid { grid-template-columns: repeat(3, 1fr); }
  .pricing-grid { grid-template-columns: repeat(3, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
}

@media (min-width: 768px) {
  h1 { font-size: 3rem; }
  h2 { font-size: 2.25rem; }
  .nav-links { display: flex; }
  .nav-toggle { display: none; }
  .hero-content { max-width: 800px; }
  .hero-subtitle { font-size: 1.3rem; }
  .step-connector { display: block; }
}

@media (min-width: 1024px) {
  h1 { font-size: 3.5rem; }
  section { padding: 6rem 0; }
}