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

:root {
  --clr-bg: #ffffff;
  --clr-primary: #1e60ff;
  --clr-primary-dark: #0d3ccf;
  --clr-text: #1f2733;
  --clr-subtext: #4c5565;
  --radius: 0.75rem;
  --spacing: clamp(1.2rem, 2vw, 2rem);
}

html, body {
  height: 100%;
  font-family: "Inter", system-ui, sans-serif;
  background: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

/* ===== Layout helpers ============================= */
.container {
  width: min(90%, 68rem);
  margin-inline: auto;
}

section,
header,
footer {
  padding-block: var(--spacing);
}

/* ===== Buttons ==================================== */
.btn-primary,
.btn-secondary {
  display: inline-block;
  padding: 0.9rem 1.6rem;
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s, transform 0.2s;
}

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

.btn-primary:hover {
  background: var(--clr-primary-dark);
  transform: translateY(-2px);
}

.btn-secondary {
  background: transparent;
  color: var(--clr-primary);
  border: 2px solid var(--clr-primary);
}

.btn-secondary:hover {
  background: var(--clr-primary);
  color: #fff;
}

/* ===== Hero ======================================= */
.hero {
  padding-block: calc(var(--spacing) * 2);
  text-align: center;
}

.hero h1 {
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 700;
  margin-bottom: 1rem;
}

.hero .subhead {
  max-width: 35rem;
  margin-inline: auto;
  font-size: 1.1rem;
  color: var(--clr-subtext);
  margin-bottom: 2rem;
}

.integrations {
  margin-top: 2.5rem;
  display: flex;
  gap: 2.5rem;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  opacity: 0.8;
}

.integrations img {
  width: 110px;
  height: auto;
  filter: grayscale(100%);
}

/* ===== Features =================================== */
.features {
  display: grid;
  gap: var(--spacing);
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  margin-top: var(--spacing);
}

.features h2 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.features p {
  color: var(--clr-subtext);
}

/* ===== CTA ======================================== */
.cta {
  background: var(--clr-primary);
  color: #fff;
  text-align: center;
  border-radius: var(--radius);
  margin-block: calc(var(--spacing) * 2);
}

.cta h2 {
  font-size: 1.75rem;
  margin-bottom: 0.8rem;
}

.cta p {
  margin-bottom: 1.6rem;
  color: #dbe5ff;
}

/* ===== Social links ============================================= */
.social-links {
  margin-top: 1.8rem;
  display: flex;
  justify-content: center;
  gap: 1.6rem;
}

.social-links a img {
  width: 32px;
  height: 32px;
  filter: brightness(0) invert(1);   /* turns icon white on the blue CTA */
  transition: transform 0.2s, opacity 0.2s;
}

.social-links a:hover img {
  transform: translateY(-3px);
  opacity: 0.85;
}

/* ===== Footer ===================================== */
.footer {
  font-size: 0.9rem;
  color: var(--clr-subtext);
  text-align: center;
  padding-block: 2rem;
  border-top: 1px solid #f0f2f7;
}