:root {
  --bg-body: #f5f5f7;
  --bg-elevated: #ffffff;
  --bg-soft: #f3f4f6;
  --border-subtle: #e5e7eb;
  --border-strong: #111827;
  --text-main: #111827;
  --text-muted: #6b7280;
  --accent: #111827;
  --accent-soft: #11182710;
  --radius-lg: 18px;
  --radius-md: 12px;
  --shadow-soft: 0 22px 45px rgba(15, 23, 42, 0.08);
  --shadow-subtle: 0 10px 25px rgba(15, 23, 42, 0.06);
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Inter", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  background: radial-gradient(circle at top, #f9fafb, #f3f4f6 55%, #e5e7eb);
  color: var(--text-main);
}

body {
  min-height: 100vh;
}

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

main {
  display: block;
}

/* Layout */

.site-shell {
  max-width: 1120px;
  margin: 0 auto;
  padding: 18px 20px 48px;
}

.site-shell--narrow {
  max-width: 860px;
}

/* Header / Nav */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(20px);
  background: linear-gradient(to bottom, #ffffffd9, #ffffffbf 60%, transparent);
  border-bottom: 1px solid #e5e7ebaa;
}

.site-header-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  width: 26px;
  height: 26px;
  border-radius: 10px;
  border: 1px solid var(--border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-subtle);
  background: radial-gradient(circle at 20% 0%, #ffffff, #e5e7eb);
}

.brand-mark span {
  font-size: 16px;
  font-weight: 600;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.brand-tagline {
  font-size: 11px;
  color: var(--text-muted);
}

.nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
}

.nav-link {
  position: relative;
  padding: 4px 0;
  color: var(--text-muted);
}

.nav-link:hover {
  color: var(--text-main);
}

.nav-link--active {
  color: var(--text-main);
  font-weight: 500;
}

.nav-link--active::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: var(--border-strong);
}

.nav-cta-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 7px 16px;
  font-size: 12px;
  border: 1px solid var(--border-strong);
  background: #ffffff;
  color: var(--text-main);
  box-shadow: 0 0 0 transparent;
  transition: box-shadow 0.15s ease, transform 0.15s ease,
    background 0.15s ease, color 0.15s ease;
  cursor: pointer;
}

.btn span {
  margin-left: 4px;
}

.btn-primary {
  background: #111827;
  color: #f9fafb;
  box-shadow: var(--shadow-subtle);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.35);
}

.btn-outline {
  background: #ffffff;
  color: var(--text-main);
  border-color: #1118271a;
}

.btn-outline:hover {
  background: #f3f4f6;
}

.hero {
  margin-top: 26px;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1.1fr);
  gap: 26px;
  align-items: center;
}

.hero-kicker {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.hero-title {
  font-size: 32px;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin: 0 0 10px;
}

.hero-highlight {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid #1118271f;
  background: rgba(17, 24, 39, 0.02);
  font-size: 12px;
  margin-top: 8px;
}

.hero-subtitle {
  font-size: 14px;
  color: var(--text-muted);
  margin: 10px 0 16px;
  max-width: 420px;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 10px;
}

.hero-note {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 6px;
}

.hero-right {
  position: relative;
}

.hero-card {
  background: radial-gradient(circle at top, #ffffff, #f3f4f6 65%, #e5e7eb);
  border-radius: 26px;
  padding: 18px 16px;
  border: 1px solid #e5e7eb;
  box-shadow: var(--shadow-soft);
}

.hero-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.hero-card-title {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--text-muted);
}

.hero-chip {
  border-radius: 999px;
  padding: 4px 9px;
  font-size: 11px;
  background: rgba(17, 24, 39, 0.03);
  border: 1px solid #e5e7eb;
  color: var(--text-muted);
}

.hero-card-main {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 12px;
}

.hero-input {
  border-radius: 14px;
  border: 1px solid var(--border-subtle);
  background: #ffffff;
  padding: 8px 10px;
  font-size: 12px;
  margin-bottom: 8px;
}

.hero-label {
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.hero-insight {
  border-radius: 14px;
  border: 1px dashed #d1d5db;
  padding: 10px;
  background: #f9fafb;
  font-size: 12px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

.hero-tag {
  border-radius: 999px;
  padding: 2px 9px;
  font-size: 11px;
  background: #11182705;
  border: 1px solid #e5e7eb;
}

.hero-meta {
  font-size: 10px;
  color: var(--text-muted);
  margin-top: 8px;
}

/* Sections */

.section {
  margin-top: 40px;
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.section-kicker {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-muted);
}

.section-title {
  font-size: 20px;
  letter-spacing: -0.02em;
  margin: 4px 0 0;
}

.section-description {
  font-size: 13px;
  color: var(--text-muted);
  max-width: 460px;
}

.section-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.card-soft {
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
  padding: 12px 12px 14px;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.04);
}

.card-soft h3 {
  font-size: 14px;
  margin: 0 0 4px;
}

.card-soft p {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0;
}

.card-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-muted);
  margin-bottom: 4px;
}

/* Comparison */

.comparison {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.comp-card {
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
  padding: 12px 12px 14px;
}

.comp-title {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
}

.comp-subtitle {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.comp-list {
  margin: 0;
  padding-left: 18px;
  font-size: 12px;
  color: var(--text-muted);
}

.comp-list li + li {
  margin-top: 4px;
}

/* Two column generic layout */

.two-col {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 26px;
  margin-top: 20px;
}

.two-col-reverse {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
}

.bullet-list {
  margin: 0;
  padding-left: 18px;
  font-size: 13px;
  color: var(--text-muted);
}

.bullet-list li + li {
  margin-top: 4px;
}

.highlight-box {
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
  padding: 12px;
  font-size: 13px;
  color: var(--text-muted);
}

/* Forms */

.form-card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
  padding: 18px 16px;
  box-shadow: var(--shadow-soft);
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 10px;
}

.form-label {
  font-size: 12px;
  font-weight: 500;
}

.form-input,
.form-textarea {
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
  padding: 8px 10px;
  font-size: 13px;
  font-family: inherit;
  resize: vertical;
}

.form-footnote {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 6px;
}

/* Footer */

.site-footer {
  border-top: 1px solid #e5e7ebaa;
  margin-top: 40px;
}

.site-footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 14px 20px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 12px;
}

.footer-links a {
  color: var(--text-muted);
}

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

/* Responsive */

@media (max-width: 900px) {
  .site-header-inner {
    flex-wrap: wrap;
  }
  .hero {
    grid-template-columns: minmax(0, 1fr);
  }
  .hero-right {
    order: -1;
  }
  .section-grid-3 {
    grid-template-columns: minmax(0, 1fr);
  }
  .comparison {
    grid-template-columns: minmax(0, 1fr);
  }
  .two-col,
  .two-col-reverse {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
  }
  .site-shell {
    padding-inline: 16px;
  }
}