/* RESET */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI Variable", "Segoe UI", sans-serif;
}

body {
  background: #f3f6fb;
  color: #1a1a1a;
  line-height: 1.6;
}

/* CONTAINERS */
.container {
  width: 90%;
  max-width: 1200px;
  margin: auto;
}

/* HEADER — Fluent Glass */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 14px 0;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 24px;
  font-weight: 700;
  color: #0a4cff;
  letter-spacing: -0.5px;
}

/* NAV */
.nav a {
  margin: 0 18px;
  text-decoration: none;
  color: #1a1a1a;
  font-weight: 500;
  transition: 0.25s ease;
}

.nav a:hover {
  color: #0a4cff;
  transform: translateY(-2px);
}

/* BUTTONS — Fluent Rounded */
.btn-primary {
  padding: 12px 28px;
  border-radius: 8px;
  background: #0a4cff;
  color: white;
  border: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  transition: 0.25s ease;
  box-shadow: 0 4px 14px rgba(10, 76, 255, 0.25);
}

.btn-primary:hover {
  background: #003ecb;
  box-shadow: 0 6px 20px rgba(10, 76, 255, 0.35);
  transform: translateY(-3px);
}

.small {
  padding: 8px 18px;
  font-size: 14px;
}

/* HERO — Fluent Glow + Zoom */
.hero {
  background: linear-gradient(0deg, rgba(0,0,0,0.55), rgba(0,0,0,0.55)),
              url("https://cdn.hubblecontent.osi.office.net/m365content/publish/39829011-c1a7-413a-ace3-58ee6794834d/thumbnails/xxlarge.jpg");
  background-size: 115%;
  background-position: center;
  color: white;
  padding: 160px 20px;
  text-align: center;
  animation: heroZoom 14s ease-in-out infinite alternate;
}

@keyframes heroZoom {
  from { background-size: 115%; }
  to { background-size: 125%; }
}

.hero h1 {
  font-size: 52px;
  font-weight: 700;
  margin-bottom: 18px;
  letter-spacing: -1px;
  animation: fadeDown 1.2s ease;
}

.hero p {
  font-size: 20px;
  max-width: 700px;
  margin: 0 auto 35px auto;
  animation: fadeUp 1.2s ease;
}

/* SECTIONS */
.section {
  padding: 90px 20px;
}

.section-title {
  text-align: center;
  font-size: 34px;
  margin-bottom: 50px;
  color: #0a4cff;
  font-weight: 700;
}

/* GRID */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 35px;
}

/* CARDS — Fluent Elevation + Glow */
.card {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  padding: 28px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow: 0 6px 24px rgba(0,0,0,0.06);
  transition: 0.3s ease;
  animation: fadeInUp 1s ease;
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 12px 40px rgba(10, 76, 255, 0.18);
}

/* CTA — Fluent Gradient */
.cta {
  background: linear-gradient(135deg, #0a4cff, #003ecb);
  color: white;
  text-align: center;
  padding: 100px 20px;
  border-radius: 0;
}

.cta h2 {
  font-size: 40px;
  margin-bottom: 18px;
}

.cta p {
  font-size: 20px;
  margin-bottom: 35px;
}

/* ANIMATIONS */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-40px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(40px); }
  to { opacity: 1; transform: translateY(0); }
}