:root {
  --bg: #f7f9ff;
  --surface: #ffffff;
  --surface-soft: #f1f5ff;
  --text: #0f172a;
  --muted: #475569;
  --accent: #3346d3;
  --accent-strong: #2437c0;
  --border: #dbe5ff;
  --shadow: 0 18px 40px rgba(31, 65, 157, 0.12);
  --radius: 16px;
  --container: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family:
    Inter,
    "Segoe UI",
    Roboto,
    "Helvetica Neue",
    Arial,
    sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 10%, rgba(77, 101, 252, 0.1), transparent 42%),
    radial-gradient(circle at 92% 8%, rgba(89, 40, 196, 0.1), transparent 36%),
    var(--bg);
  line-height: 1.65;
}

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

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

.container {
  width: min(100% - 2.25rem, var(--container));
  margin-inline: auto;
}

.narrow {
  max-width: 760px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(8px);
  background: rgba(247, 249, 255, 0.86);
  border-bottom: 1px solid rgba(219, 229, 255, 0.8);
}

.nav-wrapper {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 0.2px;
}

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

.nav-links a {
  font-weight: 500;
  color: var(--muted);
  transition: color 0.25s ease;
}

.nav-links a:hover {
  color: var(--accent);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(51, 70, 211, 0.28);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.8);
  box-shadow: 0 8px 20px rgba(36, 58, 156, 0.1);
  padding: 0;
  align-items: center;
  justify-content: center;
  gap: 4px;
  flex-direction: column;
  cursor: pointer;
}

.menu-toggle span {
  width: 18px;
  height: 2px;
  border-radius: 99px;
  background: var(--accent);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.menu-toggle:hover {
  background: rgba(255, 255, 255, 0.95);
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.hero {
  padding: clamp(3.5rem, 8vw, 6.5rem) 0 4.25rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(2rem, 4vw, 3rem);
  align-items: center;
}

.eyebrow {
  margin: 0 0 0.7rem;
  font-weight: 600;
  font-size: 0.92rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent);
}

h1,
h2,
h3 {
  margin: 0 0 0.9rem;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2rem, 5.6vw, 3.5rem);
  font-weight: 800;
  max-width: 16ch;
}

h1 span {
  display: block;
  white-space: nowrap;
}

h2 {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.22rem;
  font-weight: 650;
}

.hero-subheadline {
  max-width: 55ch;
  color: var(--muted);
  margin-bottom: 1.8rem;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.78rem 1.35rem;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    background-color 0.2s ease,
    color 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #4f46e5);
  color: #fff;
  box-shadow: 0 14px 28px rgba(51, 70, 211, 0.28);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--accent-strong), #4338ca);
  box-shadow: 0 16px 30px rgba(51, 70, 211, 0.32);
}

.btn-secondary {
  background: var(--surface);
  color: var(--accent);
  border-color: var(--border);
}

.btn-secondary:hover {
  box-shadow: 0 8px 24px rgba(51, 70, 211, 0.15);
}

.hero-visual {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.section {
  padding: clamp(3.2rem, 6.5vw, 4.8rem) 0;
}

.section-divider {
  position: relative;
}

.section-divider::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    rgba(219, 229, 255, 0),
    rgba(96, 121, 255, 0.35),
    rgba(219, 229, 255, 0)
  );
}

#about,
#contact {
  position: relative;
}

#about::before,
#contact::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    rgba(219, 229, 255, 0),
    rgba(96, 121, 255, 0.35),
    rgba(219, 229, 255, 0)
  );
}

.section p {
  color: var(--muted);
  margin: 0;
}

.about-copy p + p {
  margin-top: 0.9rem;
}

.section-alt {
  background: rgba(255, 255, 255, 0.75);
  border-block: 1px solid rgba(219, 229, 255, 0.85);
}

.cards {
  margin-top: 1.2rem;
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: 0 8px 24px rgba(20, 36, 77, 0.06);
  transition:
    transform 0.25s ease,
    box-shadow 0.25s ease,
    border-color 0.25s ease;
}

.card:hover {
  transform: translateY(-5px);
  border-color: #becfff;
  box-shadow: 0 14px 32px rgba(20, 36, 77, 0.12);
}

.benefits {
  padding-left: 1.2rem;
  margin: 0;
  color: var(--muted);
}

.benefits li + li {
  margin-top: 0.5rem;
}

.cta {
  text-align: center;
}

.cta .btn {
  margin-top: 0.7rem;
}

.site-footer {
  border-top: 1px solid rgba(219, 229, 255, 0.85);
  background: #f5f7ff;
}

.footer-content {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  color: #334155;
  font-size: 0.95rem;
}

.footer-content a {
  color: var(--accent);
}

/* Fade-in animation utility for scroll reveal */
.fade-up {
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity 0.65s ease,
    transform 0.65s ease;
}

.fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

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

  .hero-visual {
    max-width: 640px;
    aspect-ratio: 16 / 10;
  }

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

@media (max-width: 680px) {
  .site-header {
    position: static;
  }

  .nav-wrapper {
    min-height: 64px;
    padding: 0.65rem 0;
    align-items: center;
    flex-wrap: wrap;
  }

  .brand {
    font-size: 1.95rem;
    letter-spacing: -0.02em;
  }

  .menu-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .nav-links {
    display: flex;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    margin-top: 0;
    padding: 0;
    border-radius: 14px;
    border: 0;
    background: transparent;
    box-shadow: none;
    backdrop-filter: none;
    max-height: 0;
    opacity: 0;
    transform: translateY(-6px);
    overflow: hidden;
    pointer-events: none;
    transition:
      max-height 0.28s ease,
      opacity 0.22s ease,
      transform 0.22s ease,
      margin-top 0.22s ease;
  }

  .nav-links a {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.92rem 0.82rem;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    color: #334155;
    transition:
      background-color 0.2s ease,
      color 0.2s ease,
      transform 0.2s ease;
  }

  .nav-links a + a {
    margin-top: 0.12rem;
  }

  .nav-links a::after {
    content: "›";
    font-size: 1.05rem;
    color: #8090dc;
  }

  .nav-links a:hover,
  .nav-links a:focus-visible {
    background: rgba(87, 110, 229, 0.1);
    color: var(--accent);
    transform: translateX(2px);
  }

  .nav-links.is-open {
    margin-top: 0.55rem;
    padding: 0.35rem;
    border: 1px solid rgba(93, 114, 233, 0.2);
    background:
      linear-gradient(165deg, rgba(255, 255, 255, 0.86), rgba(244, 247, 255, 0.9)),
      radial-gradient(circle at 90% 10%, rgba(99, 117, 255, 0.08), transparent 55%);
    box-shadow: 0 14px 30px rgba(32, 54, 140, 0.1);
    backdrop-filter: blur(4px);
    max-height: 360px;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .cards {
    grid-template-columns: 1fr;
  }
}