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

:root {
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #dbeafe;
  --color-primary-50: #eff6ff;
  --color-text: #0f172a;
  --color-text-secondary: #475569;
  --color-text-muted: #94a3b8;
  --color-bg: #ffffff;
  --color-bg-soft: #f8fafc;
  --color-bg-muted: #f1f5f9;
  --color-border: #e2e8f0;
  --color-success: #16a34a;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,.1);
  --shadow-xl: 0 20px 48px rgba(0,0,0,.12);
}

html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--color-text);
  line-height: 1.6;
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }
img { max-width: 100%; display: block; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: inherit; font-weight: 600; font-size: 0.9375rem;
  padding: 10px 20px; border-radius: var(--radius-sm);
  text-decoration: none; border: none; cursor: pointer;
  transition: all .2s ease;
}
.btn-sm { padding: 7px 16px; font-size: 0.875rem; }
.btn-lg { padding: 14px 28px; font-size: 1rem; }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-outline { background: transparent; color: var(--color-primary); border: 1.5px solid var(--color-primary); }
.btn-outline:hover { background: var(--color-primary-50); }
.btn-ghost { background: transparent; color: var(--color-text-secondary); }
.btn-ghost:hover { color: var(--color-text); background: var(--color-bg-muted); }
.btn-white { background: #fff; color: var(--color-primary); }
.btn-white:hover { background: var(--color-primary-50); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-block { width: 100%; justify-content: center; }

/* ===== Navigation ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,.85); backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s, box-shadow .2s;
}
.nav.scrolled { border-bottom-color: var(--color-border); box-shadow: var(--shadow-sm); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 1.125rem; color: var(--color-text);
  text-decoration: none;
}
.logo-icon { width: 32px; height: 32px; color: var(--color-primary); }
.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-links a:not(.btn) {
  font-size: .9375rem; font-weight: 500; color: var(--color-text-secondary);
  text-decoration: none; padding: 6px 12px; border-radius: var(--radius-sm);
  transition: color .15s, background .15s;
}
.nav-links a:not(.btn):hover { color: var(--color-text); background: var(--color-bg-muted); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
.nav-toggle span {
  display: block; width: 22px; height: 2px; background: var(--color-text);
  margin: 5px 0; border-radius: 2px; transition: all .2s;
}
.nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.mobile-menu {
  display: none; position: fixed; top: 64px; left: 0; right: 0; z-index: 99;
  background: var(--color-bg); border-bottom: 1px solid var(--color-border);
  padding: 16px 24px; flex-direction: column; gap: 4px;
  box-shadow: var(--shadow-lg);
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  padding: 12px 16px; font-weight: 500; color: var(--color-text-secondary);
  text-decoration: none; border-radius: var(--radius-sm);
}
.mobile-menu a:hover { background: var(--color-bg-muted); color: var(--color-text); }

/* ===== Hero ===== */
.hero {
  padding: 140px 0 80px;
  background: linear-gradient(180deg, var(--color-primary-50) 0%, var(--color-bg) 100%);
}
.hero .container { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.hero-badge {
  display: inline-block; padding: 6px 14px; border-radius: 100px;
  background: var(--color-primary-light); color: var(--color-primary);
  font-size: .8125rem; font-weight: 600; margin-bottom: 20px;
}
.hero h1 {
  font-size: 3.25rem; font-weight: 800; line-height: 1.1;
  letter-spacing: -.02em; margin-bottom: 20px;
}
.hero-sub { font-size: 1.125rem; color: var(--color-text-secondary); max-width: 520px; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.hero-note { font-size: .8125rem; color: var(--color-text-muted); }

/* Hero visual / mock card */
.hero-visual { display: flex; justify-content: center; }
.hero-card {
  width: 100%; max-width: 420px; background: var(--color-bg);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-xl);
  overflow: hidden; border: 1px solid var(--color-border);
}
.hero-card-header {
  display: flex; gap: 6px; padding: 12px 16px;
  background: var(--color-bg-muted); border-bottom: 1px solid var(--color-border);
}
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot.red { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green { background: #22c55e; }
.hero-card-body { padding: 24px; }
.hero-card-body { display: flex; flex-wrap: wrap; gap: 16px; }
.mock-stat {
  flex: 1; min-width: 80px; text-align: center; padding: 16px 12px;
  background: var(--color-bg-soft); border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}
.mock-stat-num { display: block; font-size: 1.5rem; font-weight: 700; color: var(--color-primary); }
.mock-stat-label { display: block; font-size: .75rem; color: var(--color-text-muted); margin-top: 4px; }
.mock-rows { width: 100%; display: flex; flex-direction: column; gap: 8px; margin-top: 8px; }
.mock-row {
  height: 12px; border-radius: 6px; background: var(--color-bg-muted);
}
.mock-row:nth-child(1) { width: 100%; }
.mock-row:nth-child(2) { width: 88%; }
.mock-row:nth-child(3) { width: 95%; }
.mock-row:nth-child(4) { width: 75%; }

/* ===== Trusted / audience ===== */
.trusted { padding: 48px 0; border-bottom: 1px solid var(--color-border); }
.trusted-text { text-align: center; font-size: .875rem; color: var(--color-text-muted); font-weight: 500; margin-bottom: 24px; text-transform: uppercase; letter-spacing: .05em; }
.trusted-icons { display: flex; justify-content: center; gap: 48px; flex-wrap: wrap; }
.trust-item { display: flex; flex-direction: column; align-items: center; gap: 8px; color: var(--color-text-muted); font-size: .8125rem; font-weight: 500; }

/* ===== Features ===== */
.features { padding: 100px 0; }
.section-header { text-align: center; max-width: 560px; margin: 0 auto 60px; }
.section-header h2 { font-size: 2.25rem; font-weight: 800; letter-spacing: -.01em; margin-bottom: 12px; }
.section-header p { font-size: 1.0625rem; color: var(--color-text-secondary); }
.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.feature-card {
  padding: 28px; border-radius: var(--radius-md);
  border: 1px solid var(--color-border); background: var(--color-bg);
  transition: box-shadow .2s, transform .2s;
}
.feature-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.feature-card--highlight { grid-column: span 2; background: var(--color-primary-50); border-color: var(--color-primary-light); }
.feature-icon {
  width: 48px; height: 48px; display: flex; align-items: center; justify-content: center;
  background: var(--color-primary-light); color: var(--color-primary);
  border-radius: var(--radius-sm); margin-bottom: 16px;
}
.feature-card h3 { font-size: 1.0625rem; font-weight: 700; margin-bottom: 8px; }
.feature-card p { font-size: .9375rem; color: var(--color-text-secondary); line-height: 1.55; }

/* ===== Security ===== */
.security { padding: 100px 0; background: var(--color-bg-soft); }
.security-inner { display: grid; grid-template-columns: 1fr auto; gap: 60px; align-items: center; }
.security h2 { font-size: 2.25rem; font-weight: 800; margin-bottom: 16px; }
.security-intro { font-size: 1.0625rem; color: var(--color-text-secondary); margin-bottom: 32px; max-width: 520px; }
.security-list { list-style: none; display: flex; flex-direction: column; gap: 20px; }
.security-list li { display: flex; gap: 14px; align-items: flex-start; }
.security-list li svg { flex-shrink: 0; color: var(--color-success); margin-top: 2px; }
.security-list strong { display: block; font-weight: 600; margin-bottom: 2px; }
.security-list span { font-size: .9375rem; color: var(--color-text-secondary); }
.security-visual { display: flex; align-items: center; justify-content: center; }
.shield {
  width: 160px; height: 160px; display: flex; align-items: center; justify-content: center;
  background: var(--color-primary-light); border-radius: 50%;
  color: var(--color-primary);
}

/* ===== Steps ===== */
.steps { padding: 100px 0; }
.steps-grid { display: flex; align-items: flex-start; justify-content: center; gap: 24px; }
.step {
  text-align: center; flex: 1; max-width: 280px; padding: 32px 20px;
  background: var(--color-bg); border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.step-num {
  width: 48px; height: 48px; display: inline-flex; align-items: center; justify-content: center;
  background: var(--color-primary); color: #fff; font-weight: 700; font-size: 1.25rem;
  border-radius: 50%; margin-bottom: 16px;
}
.step h3 { font-size: 1.0625rem; font-weight: 700; margin-bottom: 8px; }
.step p { font-size: .9375rem; color: var(--color-text-secondary); }
.step-arrow { display: flex; align-items: center; color: var(--color-text-muted); padding-top: 56px; }

/* ===== Pricing ===== */
.pricing { padding: 100px 0; background: var(--color-bg-soft); }
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; max-width: 960px; margin: 0 auto; }
.price-card {
  position: relative; background: var(--color-bg); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 36px 28px;
  display: flex; flex-direction: column;
}
.price-card--popular { border-color: var(--color-primary); box-shadow: 0 0 0 1px var(--color-primary), var(--shadow-lg); }
.price-badge {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--color-primary); color: #fff; font-size: .75rem; font-weight: 700;
  padding: 4px 16px; border-radius: 100px; text-transform: uppercase; letter-spacing: .03em;
}
.price-name { font-size: 1.125rem; font-weight: 700; margin-bottom: 8px; }
.price-amount { font-size: 2.5rem; font-weight: 800; margin-bottom: 8px; }
.price-amount span { font-size: 1rem; font-weight: 500; color: var(--color-text-muted); }
.price-desc { font-size: .9375rem; color: var(--color-text-secondary); margin-bottom: 24px; }
.price-features { list-style: none; flex: 1; margin-bottom: 28px; }
.price-features li {
  padding: 8px 0; font-size: .9375rem; color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-bg-muted);
}
.price-features li:last-child { border-bottom: none; }

/* ===== FAQ ===== */
.faq { padding: 100px 0; }
.faq-list { max-width: 720px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--color-border); }
.faq-item summary {
  padding: 20px 0; font-weight: 600; font-size: 1.0625rem;
  cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between;
}
.faq-item summary::after { content: '+'; font-size: 1.5rem; color: var(--color-text-muted); transition: transform .2s; }
.faq-item[open] summary::after { content: '\2212'; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item p { padding: 0 0 20px; font-size: .9375rem; color: var(--color-text-secondary); line-height: 1.65; }

/* ===== CTA ===== */
.cta {
  padding: 80px 0; text-align: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, #4f46e5 100%);
  color: #fff;
}
.cta h2 { font-size: 2.25rem; font-weight: 800; margin-bottom: 12px; }
.cta p { font-size: 1.125rem; opacity: .85; margin-bottom: 32px; }

/* ===== Footer ===== */
.footer { padding: 60px 0 32px; background: var(--color-text); color: #fff; }
.footer-inner { display: flex; justify-content: space-between; gap: 48px; margin-bottom: 40px; }
.footer-brand { max-width: 300px; }
.footer-brand .logo { color: #fff; margin-bottom: 12px; }
.footer-brand .logo-icon { color: #93bbfd; }
.footer-brand p { font-size: .9375rem; color: var(--color-text-muted); }
.footer-links { display: flex; gap: 64px; }
.footer-col { display: flex; flex-direction: column; gap: 8px; }
.footer-col h4 { font-size: .8125rem; text-transform: uppercase; letter-spacing: .06em; color: var(--color-text-muted); margin-bottom: 4px; }
.footer-col a { font-size: .9375rem; color: #cbd5e1; text-decoration: none; }
.footer-col a:hover { color: #fff; }
.footer-bottom { padding-top: 24px; border-top: 1px solid #334155; }
.footer-bottom p { font-size: .8125rem; color: var(--color-text-muted); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-card--highlight { grid-column: span 2; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }

  .hero { padding: 120px 0 60px; }
  .hero .container { grid-template-columns: 1fr; gap: 40px; text-align: center; }
  .hero h1 { font-size: 2.25rem; }
  .hero-sub { margin: 0 auto 28px; }
  .hero-actions { justify-content: center; }
  .hero-note { text-align: center; }
  .hero-visual { order: -1; }
  .hero-card { max-width: 360px; }

  .features-grid { grid-template-columns: 1fr; }
  .feature-card--highlight { grid-column: span 1; }

  .security-inner { grid-template-columns: 1fr; text-align: center; }
  .security-intro { margin: 0 auto 32px; }
  .security-list { align-items: center; }
  .security-list li { text-align: left; }
  .security-visual { order: -1; }

  .steps-grid { flex-direction: column; align-items: center; }
  .step-arrow { display: none; }

  .pricing-grid { grid-template-columns: 1fr; max-width: 400px; }

  .trusted-icons { gap: 24px; }

  .footer-inner { flex-direction: column; gap: 32px; }
  .footer-links { gap: 40px; }

  .section-header h2 { font-size: 1.75rem; }
}