:root {
  --rat-blue: #2bb1e5;
  --rat-blue-dark: #1a8fbf;
  --rat-blue-darker: #0f5e80;
  --rat-blue-light: #e8f6fc;
  --rat-blue-bg: #f4fbfe;

  --rat-accent-green: #8dc63f;
  --rat-accent-orange: #f58220;
  --rat-accent-pink: #f5a0bd;
  --rat-accent-yellow: #fbb034;

  --rat-ink: #1a2733;
  --rat-text: #3a4a57;
  --rat-text-soft: #6b7a85;
  --rat-line: #e5ecf1;
  --rat-bg: #ffffff;
  --rat-bg-soft: #f8fafb;

  --rat-font:
    "Source Sans Pro", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    sans-serif;

  --rat-radius: 28px;
  --rat-radius-sm: 12px;
  --rat-shadow: 0 8px 32px rgba(43, 177, 229, 0.08);
  --rat-shadow-lg: 0 20px 60px rgba(15, 94, 128, 0.12);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: var(--rat-font);
  font-size: 17px;
  line-height: 1.65;
  color: var(--rat-text);
  background: var(--rat-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: var(--rat-blue-dark);
  text-decoration: none;
}
a:hover {
  color: var(--rat-blue);
  text-decoration: underline;
}

.rat-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 2px solid transparent;
  cursor: pointer;
  transition:
    transform 0.15s ease,
    box-shadow 0.15s ease,
    background 0.15s ease;
  text-decoration: none;
  white-space: nowrap;
}
.rat-btn--primary {
  background: var(--rat-blue);
  color: #fff;
  box-shadow: 0 6px 20px rgba(43, 177, 229, 0.35);
}
.rat-btn--primary:hover {
  background: var(--rat-blue-dark);
  color: #fff;
  transform: translateY(-1px);
  text-decoration: none;
  box-shadow: 0 10px 28px rgba(43, 177, 229, 0.45);
}
.rat-btn--ghost {
  background: transparent;
  color: var(--rat-blue-dark);
  border-color: var(--rat-blue);
}
.rat-btn--ghost:hover {
  background: var(--rat-blue-light);
  text-decoration: none;
}
.rat-btn--large {
  padding: 18px 36px;
  font-size: 16px;
}

.rat-header {
  background: #fff;
  border-bottom: 1px solid var(--rat-line);
  position: sticky;
  top: 0;
  z-index: 50;
}
.rat-header__inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  gap: 32px;
}
.rat-header__logo img {
  height: 44px;
  width: auto;
}
.rat-logo {
  height: 38px;
  width: auto;
  display: block;
}
@media (max-width: 880px) {
  .rat-logo {
    height: 28px;
  }
}
.rat-nav {
  display: flex;
  gap: 28px;
  flex: 1;
  margin-left: 24px;
}
.rat-nav a {
  color: var(--rat-ink);
  font-weight: 600;
  font-size: 15px;
}
.rat-nav a:hover {
  color: var(--rat-blue);
  text-decoration: none;
}
.rat-header__cta {
  display: flex;
  gap: 12px;
  align-items: center;
}
.rat-header__cta .rat-btn {
  padding: 11px 22px;
  font-size: 13px;
}

@media (max-width: 880px) {
  .rat-nav {
    display: none;
  }
  .rat-header__inner {
    padding: 12px 14px;
    gap: 8px;
    justify-content: space-between;
  }
  .rat-header__logo img {
    height: 32px;
  }
  .rat-header__cta {
    gap: 8px;
  }
  .rat-header__cta .rat-btn--ghost {
    display: none;
  }
  .rat-header__cta .rat-btn--primary {
    padding: 9px 16px;
    font-size: 12px;
  }
}

.rat-hero {
  background: linear-gradient(180deg, var(--rat-blue-bg) 0%, #fff 100%);
  padding: 64px 24px 80px;
  position: relative;
  overflow: hidden;
}
.rat-hero__inner {
  max-width: 1180px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 48px;
  align-items: center;
}
.rat-hero__eyebrow {
  display: inline-block;
  background: #fff;
  border: 1px solid var(--rat-line);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--rat-blue-dark);
  margin-bottom: 18px;
}
.rat-hero h1 {
  font-size: clamp(32px, 4.4vw, 52px);
  line-height: 1.08;
  font-weight: 900;
  color: var(--rat-ink);
  margin: 0 0 18px;
  letter-spacing: -0.01em;
}
.rat-hero__sub {
  font-size: clamp(17px, 1.4vw, 20px);
  color: var(--rat-text);
  margin-bottom: 28px;
  max-width: 56ch;
}

.rat-signup {
  background: #fff;
  border: 1px solid var(--rat-line);
  border-radius: var(--rat-radius);
  padding: 8px 8px 8px 22px;
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: 640px;
  box-shadow: var(--rat-shadow-lg);
}
.rat-signup input[type="text"] {
  flex: 1 1 auto;
  min-width: 180px;
  border: 0;
  outline: 0;
  background: transparent;
  font-family: inherit;
  font-size: 16px;
  color: var(--rat-ink);
  padding: 12px 0;
}
.rat-signup input::placeholder {
  color: var(--rat-text-soft);
}
.rat-signup .rat-btn {
  flex-shrink: 0;
}

.rat-hero__benefits {
  margin-top: 18px;
  font-size: 14px;
  color: var(--rat-text-soft);
  font-weight: 600;
}
.rat-hero__benefits span {
  display: inline-block;
  margin-right: 18px;
  padding-left: 22px;
  background: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%232BB1E5'><path d='M16.7 5.3a1 1 0 010 1.4l-8 8a1 1 0 01-1.4 0l-4-4a1 1 0 011.4-1.4L8 12.6l7.3-7.3a1 1 0 011.4 0z'/></svg>")
    no-repeat left center / 16px 16px;
}

.rat-hero__mascot {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: flex-end;
}
.rat-colby {
  max-width: 340px;
  width: 100%;
  height: auto;
  display: block;
}
.rat-colby--organizer {
  max-width: 360px;
}
@media (max-width: 880px) {
  .rat-colby {
    max-width: 220px;
  }
  .rat-colby--organizer {
    max-width: 240px;
  }
}

@media (max-width: 880px) {
  .rat-hero {
    padding: 40px 16px 48px;
  }
  .rat-hero__inner {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .rat-hero__mascot {
    order: -1;
  }
  .rat-signup {
    padding: 8px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }
  .rat-signup input[type="text"] {
    padding: 14px 16px;
    text-align: center;
  }
  .rat-signup .rat-btn {
    width: 100%;
    white-space: normal;
    line-height: 1.2;
    padding: 16px 12px;
    font-size: 14px;
  }
  .rat-btn--large {
    padding: 16px 20px;
    font-size: 14px;
  }
  .rat-hero__benefits span {
    display: block;
    margin: 6px 0;
  }
}
@media (max-width: 480px) {
  .rat-hero h1 {
    font-size: 30px;
  }
  .rat-hero__sub {
    font-size: 16px;
  }
}

.rat-proof {
  background: var(--rat-blue-darker);
  color: #fff;
  padding: 28px 24px;
  text-align: center;
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 700;
}
.rat-proof strong {
  color: var(--rat-accent-yellow);
}

.rat-content {
  max-width: 820px;
  margin: 0 auto;
  padding: 72px 24px;
}
.rat-content__intro p {
  font-size: 19px;
  color: var(--rat-text);
  margin: 0 0 18px;
}
.rat-content h2 {
  font-size: clamp(24px, 2.6vw, 32px);
  line-height: 1.2;
  color: var(--rat-ink);
  font-weight: 800;
  margin: 48px 0 18px;
  letter-spacing: -0.01em;
}
.rat-content h2::before {
  content: "";
  display: block;
  width: 56px;
  height: 4px;
  background: var(--rat-blue);
  border-radius: 999px;
  margin-bottom: 14px;
}
.rat-content p {
  margin: 0 0 18px;
}
.rat-content ul {
  padding-left: 22px;
  margin: 0 0 18px;
}
.rat-content li {
  margin-bottom: 10px;
}
.rat-content strong {
  color: var(--rat-ink);
}

.rat-metrics {
  background: var(--rat-blue-bg);
  padding: 48px 24px;
}
.rat-metrics__inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.rat-metric {
  background: #fff;
  border-radius: var(--rat-radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--rat-shadow);
}
.rat-metric__value {
  display: block;
  font-size: clamp(32px, 4vw, 44px);
  font-weight: 900;
  color: var(--rat-blue-dark);
  line-height: 1;
  margin-bottom: 8px;
}
.rat-metric__label {
  font-size: 14px;
  color: var(--rat-text-soft);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
}
@media (max-width: 720px) {
  .rat-metrics__inner {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

.rat-faq {
  max-width: 820px;
  margin: 0 auto;
  padding: 24px 24px 72px;
}
.rat-faq h2 {
  font-size: clamp(26px, 3vw, 36px);
  color: var(--rat-ink);
  font-weight: 800;
  margin: 0 0 28px;
  text-align: center;
}
.rat-faq details {
  background: #fff;
  border: 1px solid var(--rat-line);
  border-radius: var(--rat-radius-sm);
  padding: 20px 24px;
  margin-bottom: 12px;
  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease;
}
.rat-faq details[open] {
  border-color: var(--rat-blue);
  box-shadow: var(--rat-shadow);
}
.rat-faq summary {
  cursor: pointer;
  font-weight: 700;
  font-size: 17px;
  color: var(--rat-ink);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.rat-faq summary::-webkit-details-marker {
  display: none;
}
.rat-faq summary::after {
  content: "+";
  font-size: 24px;
  font-weight: 400;
  color: var(--rat-blue);
  transition: transform 0.2s ease;
}
.rat-faq details[open] summary::after {
  content: "−";
}
.rat-faq details p {
  margin: 14px 0 0;
  color: var(--rat-text);
}

.rat-related {
  background: var(--rat-bg-soft);
  padding: 72px 24px;
}
.rat-related__inner {
  max-width: 1180px;
  margin: 0 auto;
}
.rat-related h2 {
  font-size: clamp(24px, 2.6vw, 30px);
  color: var(--rat-ink);
  font-weight: 800;
  margin: 0 0 32px;
  text-align: center;
}
.rat-related__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}
.rat-related__card {
  background: #fff;
  border: 1px solid var(--rat-line);
  border-radius: var(--rat-radius-sm);
  padding: 24px;
  text-decoration: none;
  color: var(--rat-ink);
  transition:
    transform 0.15s ease,
    box-shadow 0.15s ease,
    border-color 0.15s ease;
  display: flex;
  flex-direction: column;
}
.rat-related__card:hover {
  border-color: var(--rat-blue);
  box-shadow: var(--rat-shadow);
  transform: translateY(-2px);
  text-decoration: none;
}
.rat-related__tag {
  display: inline-block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
  color: var(--rat-blue-dark);
  margin-bottom: 10px;
}
.rat-related__title {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--rat-ink);
  margin: 0;
}

.rat-cta-band {
  background: linear-gradient(
    135deg,
    var(--rat-blue) 0%,
    var(--rat-blue-dark) 100%
  );
  color: #fff;
  padding: 72px 24px;
  text-align: center;
}
.rat-cta-band__inner {
  max-width: 860px;
  margin: 0 auto;
}
.rat-cta-band h2 {
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 900;
  margin: 0 0 14px;
  color: #fff;
}
.rat-cta-band p {
  font-size: 18px;
  opacity: 0.92;
  margin: 0 0 28px;
  max-width: 60ch;
  margin-left: auto;
  margin-right: auto;
}
.rat-cta-band .rat-btn--primary {
  background: #fff;
  color: var(--rat-blue-dark);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}
.rat-cta-band .rat-btn--primary:hover {
  background: var(--rat-accent-yellow);
  color: var(--rat-ink);
}

.rat-signup--cta {
  background: #fff;
  border-radius: 999px;
  padding: 6px;
  display: flex;
  gap: 6px;
  align-items: center;
  max-width: 640px;
  margin: 0 auto 24px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.22);
}
.rat-signup--cta input[type="text"] {
  flex: 1;
  border: none;
  outline: none;
  padding: 14px 22px;
  font: inherit;
  font-size: 16px;
  background: transparent;
  color: var(--rat-ink);
  min-width: 0;
}
.rat-signup--cta input[type="text"]::placeholder {
  color: #6e7b85;
}
.rat-signup--cta .rat-btn {
  background: var(--rat-blue);
  color: #fff;
  box-shadow: none;
  flex-shrink: 0;
}
.rat-signup--cta .rat-btn:hover {
  background: var(--rat-blue-dark);
}
.rat-cta-band__benefits {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  margin: 0;
  font-size: 13px;
  opacity: 0.95;
}
.rat-cta-band__benefits span {
  white-space: nowrap;
}
@media (max-width: 720px) {
  .rat-cta-band {
    padding: 52px 18px;
  }
  .rat-signup--cta {
    flex-direction: column;
    padding: 10px;
    border-radius: 18px;
    gap: 8px;
  }
  .rat-signup--cta input[type="text"] {
    text-align: center;
    padding: 14px;
  }
  .rat-signup--cta .rat-btn {
    width: 100%;
    white-space: normal;
    line-height: 1.2;
    padding: 16px 12px;
    font-size: 14px;
  }
  .rat-cta-band__benefits {
    gap: 8px;
    flex-direction: column;
  }
}

.rat-footer {
  background: var(--rat-ink);
  color: #c5d2dc;
  padding: 56px 24px 24px;
}
.rat-footer a {
  color: #c5d2dc;
}
.rat-footer a:hover {
  color: var(--rat-blue);
  text-decoration: none;
}
.rat-footer__inner {
  max-width: 1240px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}
.rat-footer__heading {
  color: #fff;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  margin: 0 0 16px;
}
.rat-footer__heading--social {
  margin-top: 24px;
}
.rat-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.rat-footer li {
  margin-bottom: 10px;
  font-size: 14px;
}
.rat-footer__social {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.rat-footer__social li {
  margin: 0;
}
.rat-footer__legal {
  max-width: 1240px;
  margin: 40px auto 0;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 13px;
  color: #8095a6;
}
.rat-footer__legal p {
  margin: 4px 0;
}

@media (max-width: 880px) {
  .rat-footer__inner {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
  }
  .rat-content {
    padding: 48px 22px;
  }
  .rat-faq,
  .rat-related,
  .rat-cta-band,
  .rat-metrics {
    padding-left: 18px;
    padding-right: 18px;
  }
}
@media (max-width: 520px) {
  .rat-footer__inner {
    grid-template-columns: 1fr;
  }
}

.rat-hero {
  padding-top: 120px;
}
@media (max-width: 880px) {
  .rat-hero {
    padding-top: 92px;
  }
}