:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f7f8fb;
  --color-text: #1a1d29;
  --color-text-muted: #565b6b;
  --color-border: #e4e6ec;
  --color-primary: #2952e3;
  --color-primary-dark: #1f3fb8;
  --color-accent-bg: #eef1fd;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;

  --max-width: 720px;
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

a {
  color: var(--color-primary);
}

:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Header */

.site-header {
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
}

.site-header .brand {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
}

/* Hero */

.hero {
  padding: var(--space-5) 0 var(--space-4);
}

.hero h1 {
  font-size: clamp(1.75rem, 4vw + 1rem, 2.75rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-3);
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 60ch;
  margin: 0 0 var(--space-4);
}

/* Sections */

.section {
  padding: var(--space-4) 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section h2 {
  font-size: clamp(1.35rem, 2vw + 1rem, 1.9rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 0 0 var(--space-3);
  max-width: 40ch;
}

.section p {
  color: var(--color-text-muted);
  max-width: 65ch;
}

/* Lists */

.criteria-list,
.plain-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.criteria-list li,
.plain-list li {
  position: relative;
  padding-left: 1.75rem;
  color: var(--color-text);
}

.criteria-list li::before,
.plain-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
}

/* Recommendation */

.recommendation-card {
  background: var(--color-accent-bg);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: var(--space-4);
}

.recommendation-card h2 {
  max-width: none;
}

.recommendation-product {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin: 0 0 var(--space-2);
}

.recommendation-card p {
  color: var(--color-text);
}

.integrations-note {
  font-size: 0.95rem;
  color: var(--color-text-muted) !important;
}

/* CTA final */

.cta-final {
  text-align: left;
}

/* Buttons */

.btn {
  display: inline-block;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  padding: 0.85rem 1.75rem;
  border-radius: 10px;
  cursor: pointer;
  border: none;
  margin-top: var(--space-2);
}

.btn-primary {
  background: var(--color-primary);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
}

.dev-notice {
  margin-top: var(--space-2);
  font-size: 0.85rem;
  color: #a15c00;
  background: #fff4e0;
  border: 1px solid #f0d9a8;
  border-radius: 8px;
  padding: 0.6rem 0.9rem;
  max-width: fit-content;
}

/* Disclosure */

.disclosure p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  max-width: none;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-4) 0;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.site-footer .brand {
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 0.25rem;
}

.site-footer p {
  margin: 0.25rem 0;
}

.footer-meta {
  margin-top: var(--space-2) !important;
  font-size: 0.8rem;
}

/* Responsive */

@media (min-width: 640px) {
  :root {
    --space-5: 6rem;
  }
}