:root {
  --color-primary: #0f172a;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-bg-light: #f8fafc;
  --color-text-dark: #1e293b;
  --color-border: #e2e8f0;
  --color-white: #ffffff;
  --shadow-soft: 0 8px 24px rgba(15, 23, 42, 0.06);
  --radius: 12px;
  --container: 1100px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  color: var(--color-text-dark);
  background: var(--color-white);
  line-height: 1.6;
}

h1,
h2,
h3 {
  color: var(--color-primary);
  line-height: 1.2;
  margin-top: 0;
  font-weight: 700;
}

h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 1rem;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  margin-bottom: 0.75rem;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: min(var(--container), 92%);
  margin-inline: auto;
}

.section {
  padding: 4.5rem 0;
}

.section-alt {
  background: var(--color-bg-light);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.lead,
.section-intro {
  max-width: 70ch;
  font-size: 1.075rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 1rem;
  padding: 0.5rem 1rem;
  background: var(--color-primary);
  color: var(--color-white);
}

.skip-link:focus {
  left: 1rem;
  z-index: 1000;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4.25rem;
}

.brand {
  font-weight: 800;
  color: var(--color-primary);
}

.site-nav {
  display: flex;
  gap: 1.25rem;
  align-items: center;
}

.site-nav a {
  color: var(--color-text-dark);
  font-weight: 500;
}

.menu-toggle {
  display: none;
  border: 1px solid var(--color-border);
  background: var(--color-white);
  border-radius: 10px;
  padding: 0.5rem;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-primary);
  margin: 4px 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 2rem;
  align-items: start;
}

.hero-panel,
.card,
.step-card,
.cta-box {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-white);
  padding: 1.5rem;
  box-shadow: var(--shadow-soft);
}

.card-grid {
  display: grid;
  gap: 1rem;
}

.four-up {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

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

.steps-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.step-number {
  display: inline-block;
  color: var(--color-accent);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.faq-list {
  display: grid;
  gap: 0.75rem;
}

.faq-list details {
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 1rem;
}

.faq-list summary {
  cursor: pointer;
  color: var(--color-primary);
  font-weight: 600;
}

.cta-section {
  background: var(--color-primary);
}

.cta-box {
  text-align: center;
  max-width: 720px;
  margin-inline: auto;
  background: transparent;
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--color-white);
}

.cta-box h2,
.cta-box p {
  color: var(--color-white);
}

.btn {
  display: inline-block;
  border-radius: 10px;
  padding: 0.72rem 1.2rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  text-decoration: none;
}

.btn-secondary {
  background: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-border);
}

.button-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 1.5rem;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.full-width {
  grid-column: 1 / -1;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 0.7rem 0.8rem;
  font: inherit;
  color: var(--color-text-dark);
}

input:focus,
textarea:focus,
button:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.25);
  outline-offset: 2px;
}

.error-message {
  min-height: 1rem;
  margin: 0;
  color: #b91c1c;
  font-size: 0.875rem;
}

.success-message {
  color: #166534;
  margin-top: 1rem;
  font-weight: 600;
}

.mailto-link {
  margin-top: 0.6rem;
}

.radio-group {
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 0.85rem;
}

.radio-group label {
  margin-right: 1rem;
}

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 0;
}

.footer-grid {
  display: grid;
  gap: 0.6rem;
}

.tagline {
  color: #475569;
  margin: 0;
}

.back-to-top {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  width: 42px;
  height: 42px;
  border: none;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  cursor: pointer;
  display: none;
}

.back-to-top.visible {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

@media (max-width: 960px) {
  .four-up,
  .steps-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .three-up,
  .hero-grid,
  .contact-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .menu-toggle {
    display: inline-block;
  }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    display: none;
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem 4%;
  }

  .site-nav.open {
    display: flex;
  }

  .form-grid,
  .four-up,
  .three-up,
  .steps-grid {
    grid-template-columns: 1fr;
  }
}