:root {
  --clr-bg: #0e1a22;
  --clr-bg-alt: #102a3a;
  --clr-light: #f1f5f9;
  --clr-light-alt: #e2e8f0;
  --clr-primary: #2f7ebf;
  --clr-primary-dark: #1f5d8b;
  --clr-accent: #90d1ff;
  --clr-text: #0b1320;
  --clr-muted: #4b5563;
  --radius: 16px;
  --shadow: 0 20px 40px rgba(10, 24, 36, 0.22);
  --max-width: 1080px;
  --max-width-tight: 860px;
  font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--clr-text);
  line-height: 1.6;
}

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

body {
  margin: 0;
  background-color: #f9fbfd;
}

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

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.container {
  width: min(100% - 2rem, var(--max-width));
  margin: 0 auto;
}

.container--tight {
  width: min(100% - 2rem, var(--max-width-tight));
}

.container--split {
  width: min(100% - 2rem, var(--max-width));
  display: grid;
  gap: 3rem;
  align-items: start;
}

.site-header {
  background-color: #fff;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(15, 38, 51, 0.08);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 4.5rem;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.logo {
  font-size: 1.2rem;
  text-transform: uppercase;
  color: var(--clr-primary);
}

.tagline {
  font-size: 0.95rem;
  color: var(--clr-muted);
}

.main-nav {
  position: relative;
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  padding: 0;
  margin: 0;
  font-weight: 500;
}

.main-nav a {
  color: var(--clr-muted);
  transition: color 0.2s ease;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--clr-primary);
}

.nav-toggle {
  display: none;
  border: none;
  background: none;
  font-size: 1.6rem;
  color: var(--clr-primary);
  cursor: pointer;
}

.hero {
  padding: 6rem 0;
  background: radial-gradient(circle at top left, #1f3e56, #0d1822);
  color: var(--clr-light);
}

.hero__content {
  display: grid;
  gap: 3rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: center;
}

.hero__text h1 {
  font-size: clamp(2.4rem, 3.4vw + 1.2rem, 3.6rem);
  line-height: 1.1;
  margin-bottom: 1.2rem;
}

.hero__text p {
  color: rgba(241, 245, 249, 0.92);
  margin-bottom: 1.4rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.8rem;
  color: var(--clr-accent);
  margin-bottom: 0.75rem;
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.btn--primary {
  background-color: var(--clr-primary);
  color: #fff;
  box-shadow: 0 14px 28px rgba(9, 35, 53, 0.32);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background-color: var(--clr-primary-dark);
  transform: translateY(-1px);
}

.btn--ghost {
  border: 1px solid rgba(232, 243, 255, 0.32);
  color: var(--clr-light);
  background: rgba(255, 255, 255, 0.04);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: rgba(255, 255, 255, 0.6);
  transform: translateY(-1px);
}

.hero__highlights {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.65rem;
  color: rgba(228, 237, 245, 0.82);
  font-size: 0.95rem;
}

.hero__card {
  display: flex;
  justify-content: center;
}

.sms-card {
  background: rgba(11, 26, 40, 0.75);
  border-radius: var(--radius);
  padding: 1.75rem;
  width: min(100%, 360px);
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
}

.sms-card__label {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(145, 225, 255, 0.82);
}

.sms-card__message {
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  border-radius: 14px;
  font-size: 0.95rem;
  line-height: 1.4;
  color: #0d1822;
}

.sms-card__message--incoming {
  background-color: #e8f4ff;
  border-bottom-left-radius: 4px;
}

.sms-card__message--outgoing {
  background-color: #d9e8f3;
  border-bottom-right-radius: 4px;
  margin-left: auto;
}

.sms-card__status {
  margin-top: 1.4rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(218, 234, 248, 0.72);
}

.section {
  padding: 5rem 0;
}

.section--light {
  background-color: #f1f5f9;
}

.section--dark {
  background: linear-gradient(135deg, var(--clr-bg), var(--clr-bg-alt));
  color: var(--clr-light);
}

.section__intro {
  margin-bottom: 2.5rem;
  max-width: 720px;
}

.section__intro h2 {
  font-size: clamp(2rem, 2.6vw + 1rem, 2.8rem);
  margin-bottom: 1rem;
}

.grid {
  display: grid;
  gap: 1.75rem;
}

.grid--three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid--two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.feature-list {
  display: grid;
  gap: 1.5rem;
}

.feature {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.25rem;
  padding: 1.6rem;
  background-color: #fff;
  border-radius: var(--radius);
  box-shadow: 0 10px 24px rgba(14, 26, 34, 0.08);
}

.feature__icon {
  font-size: 1.9rem;
}

.card {
  background-color: #fff;
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: 0 12px 28px rgba(14, 26, 34, 0.08);
}

.section--light .card {
  background-color: #fff;
}

.quote {
  font-size: 1.35rem;
  font-style: italic;
  margin: 0;
  line-height: 1.6;
  text-align: center;
}

.quote cite {
  display: block;
  font-size: 0.95rem;
  margin-top: 1.5rem;
  font-style: normal;
  color: rgba(224, 240, 255, 0.78);
}

.cta-form {
  background-color: #fff;
  padding: 2.5rem;
  border-radius: var(--radius);
  box-shadow: 0 12px 28px rgba(14, 26, 34, 0.12);
  display: grid;
  gap: 1rem;
}

.cta-form h3 {
  margin: 0;
}

.cta-form label {
  font-weight: 600;
  font-size: 0.9rem;
}

.cta-form input,
.cta-form textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border-radius: 10px;
  border: 1px solid rgba(15, 38, 51, 0.14);
  font: inherit;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.cta-form input:focus,
.cta-form textarea:focus {
  outline: none;
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 3px rgba(47, 126, 191, 0.2);
}

.form-footnote {
  font-size: 0.8rem;
  color: var(--clr-muted);
  margin: 0;
}

.list-check {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  display: grid;
  gap: 0.75rem;
}

.list-check li::before {
  content: "✔";
  color: var(--clr-primary);
  margin-right: 0.75rem;
}

.site-footer {
  background-color: #0b1620;
  color: rgba(225, 236, 248, 0.78);
  padding: 2.5rem 0;
  text-align: center;
}

.site-footer .container {
  display: grid;
  gap: 1rem;
  justify-items: center;
}

.footer__links {
  display: flex;
  gap: 1.5rem;
  font-size: 0.9rem;
}

.footer__links a {
  color: rgba(225, 236, 248, 0.78);
}

.footer__links a:hover,
.footer__links a:focus-visible {
  color: #fff;
}

@media (max-width: 960px) {
  .hero__content {
    grid-template-columns: 1fr;
  }

  .grid--three {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .container--split {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .site-header {
    position: sticky;
  }

  .main-nav ul {
    position: absolute;
    inset: 3.5rem 0 auto auto;
    background-color: #fff;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    box-shadow: 0 16px 30px rgba(12, 24, 34, 0.12);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.2s ease;
  }

  .main-nav ul[aria-hidden="true"] {
    transform: scaleY(0);
  }

  .main-nav ul[aria-hidden="false"] {
    transform: scaleY(1);
  }

  .main-nav li {
    width: 100%;
    padding: 0.65rem 0;
  }

  .nav-toggle {
    display: block;
  }

  .hero {
    padding: 5rem 0 4rem;
  }

  .hero__text h1 {
    font-size: 2.5rem;
  }

  .grid--three,
  .grid--two {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .cta-group {
    flex-direction: column;
  }

  .cta-form {
    padding: 2rem;
  }
}