/* ==========================================================================
   Notchbell — Design System
   Minimal. Precise. Structured. Calm. Premium.
   ========================================================================== */

:root {
  --white: #FFFFFF;
  --black: #000000;
  --grey: #E5E7EB;
  --grey-text: #6B7280;
  --blue: #3B82F6;
  --blue-dark: #2563EB;

  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --space-7: 96px;
  --space-8: 128px;

  --radius: 12px;
  --radius-sm: 8px;
  --max-width: 1200px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--black);
  background: var(--white);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4, p { margin: 0; }
button { font-family: inherit; cursor: pointer; }

/* ---- Typography ---- */
h1, .h1 {
  font-weight: 300;
  font-size: clamp(2.5rem, 5vw, 4.25rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
}
h2, .h2 {
  font-weight: 300;
  font-size: clamp(2rem, 3.5vw, 3rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
}
h3, .h3 {
  font-weight: 500;
  font-size: 1.375rem;
  line-height: 1.3;
}
p { font-weight: 400; font-size: 1.0625rem; color: #1F2937; }
.eyebrow {
  font-weight: 600;
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue);
}
.lede {
  font-size: 1.25rem;
  color: var(--grey-text);
  font-weight: 400;
}
.text-center { text-align: center; }

/* ---- Layout ---- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}
.section { padding: var(--space-7) 0; }
.section-tight { padding: var(--space-6) 0; }
.grid {
  display: grid;
  gap: var(--space-3);
}
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 860px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
}
.bg-grey { background: var(--grey); }
.bg-black { background: var(--black); color: var(--white); }
.bg-black p { color: #D1D5DB; }
.divider {
  height: 1px;
  background: var(--grey);
  border: none;
  margin: 0;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 0.9375rem;
  border: 1px solid transparent;
  transition: all 0.2s var(--ease);
  white-space: nowrap;
}
.btn-primary {
  background: var(--black);
  color: var(--white);
}
.btn-primary:hover { background: #1F2937; transform: translateY(-1px); }
.btn-secondary {
  background: transparent;
  color: var(--black);
  border-color: var(--black);
}
.btn-secondary:hover { background: var(--black); color: var(--white); }
.btn-accent {
  background: var(--blue);
  color: var(--white);
}
.btn-accent:hover { background: var(--blue-dark); transform: translateY(-1px); }
.btn-block { width: 100%; }
.cta-row {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* ---- Nav ---- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--grey);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-3);
  max-width: var(--max-width);
  margin: 0 auto;
}
.logo {
  font-weight: 600;
  font-size: 1.0625rem;
  letter-spacing: -0.01em;
}
.logo span { color: var(--blue); }
.nav-links {
  display: flex;
  gap: var(--space-4);
}
.nav-links a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: #374151;
  transition: color 0.2s var(--ease);
}
.nav-links a:hover, .nav-links a.active { color: var(--black); }
.nav-cta { display: flex; align-items: center; gap: var(--space-2); }
.nav-toggle { display: none; }
@media (max-width: 760px) {
  .nav-links { display: none; }
}

/* ---- Hero ---- */
.hero {
  padding: var(--space-7) 0 var(--space-6);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero-shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  z-index: -1;
}
.hero-shape-1 {
  width: 420px; height: 420px;
  background: var(--blue);
  top: -180px; left: 50%;
  transform: translateX(-70%);
}
.hero-shape-2 {
  width: 320px; height: 320px;
  background: var(--grey);
  top: -60px; right: 10%;
  opacity: 0.6;
}
.hero h1 { max-width: 820px; margin: 0 auto var(--space-3); }
.hero .lede { max-width: 600px; margin: 0 auto var(--space-4); }
.hero .cta-row { justify-content: center; }

/* ---- Cards ---- */
.card {
  background: var(--white);
  border: 1px solid var(--grey);
  border-radius: var(--radius);
  padding: var(--space-4);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -20px rgba(0,0,0,0.15);
}
.card-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: var(--grey);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-3);
  color: var(--blue);
  font-weight: 600;
}
.card h3 { margin-bottom: var(--space-1); }
.card p { color: var(--grey-text); font-size: 0.9375rem; }

/* ---- Product Card ---- */
.product-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}
.product-price {
  font-size: 1.75rem;
  font-weight: 300;
  margin: var(--space-2) 0;
}
.product-price span { font-size: 0.9375rem; color: var(--grey-text); font-weight: 400; }
.product-card ul { margin: var(--space-2) 0; }
.product-card li {
  font-size: 0.9375rem;
  color: #374151;
  padding-left: var(--space-3);
  position: relative;
  margin-bottom: 6px;
}
.product-card li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--blue);
}
.product-card .btn { margin-top: auto; }
.product-card .eyebrow { display: block; margin-bottom: var(--space-1); }

/* ---- Section header ---- */
.section-head {
  max-width: 640px;
  margin: 0 auto var(--space-5);
  text-align: center;
}
.section-head .eyebrow { display: block; margin-bottom: var(--space-1); }
.section-head h2 { margin-bottom: var(--space-2); }
.section-head p { color: var(--grey-text); }

/* ---- Pricing ---- */
.pricing-card {
  border: 1px solid var(--grey);
  border-radius: var(--radius);
  padding: var(--space-4);
  text-align: center;
}
.pricing-card.featured {
  border: 2px solid var(--blue);
  position: relative;
}
.pricing-card .price {
  font-size: 2.5rem;
  font-weight: 300;
  margin: var(--space-2) 0;
}
.pricing-card .price span { font-size: 1rem; color: var(--grey-text); }

/* ---- Steps / Journey ---- */
.steps {
  counter-reset: step;
  display: grid;
  gap: var(--space-3);
}
.step {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
}
.step-num {
  flex-shrink: 0;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--black);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 600;
}

/* ---- Footer ---- */
.footer {
  border-top: 1px solid var(--grey);
  padding: var(--space-6) 0 var(--space-4);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}
@media (max-width: 760px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
.footer-col h4 {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--grey-text);
  margin-bottom: var(--space-2);
}
.footer-col a, .footer-col p {
  display: block;
  font-size: 0.9375rem;
  color: #374151;
  margin-bottom: 10px;
}
.footer-col a:hover { color: var(--blue); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-3);
  border-top: 1px solid var(--grey);
  font-size: 0.8125rem;
  color: var(--grey-text);
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ---- Utility ---- */
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-5 { margin-top: var(--space-5); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.badge {
  display: inline-block;
  background: var(--grey);
  color: #374151;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 100px;
  letter-spacing: 0.02em;
}
.badge-blue { background: rgba(59, 130, 246, 0.12); color: var(--blue); }