/* =========================
   RESET
========================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* =========================
   BODY & CONTAINER
========================= */
body {
  background: linear-gradient(135deg, #020617 0%, #0a0f1c 50%, #0f172a 100%);
  color: #f1f5f9;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  line-height: 1.7;
}

.container {
  width: 90%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* =========================
   NAVBAR
========================= */
.navbar {
  background: rgba(15, 23, 42, 0.88);
  backdrop-filter: blur(16px);
  padding: 1.3rem 0;
  border-bottom: 1px solid rgba(56,189,248,0.15);
  position: sticky;
  top: 0;
  z-index: 1000;
}

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

.logo {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, #60a5fa, #38bdf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo span {
  background: linear-gradient(135deg, #38bdf8, #60a5fa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.navbar nav {
  display: flex;
  gap: 2.5rem;
}

.navbar nav a {
  color: #94a3b8;
  text-decoration: none;
  font-weight: 500;
  position: relative;
  transition: 0.3s;
}

.navbar nav a::after {
  content: "";
  position: absolute;
  width: 0;
  height: 2px;
  left: 0;
  bottom: -6px;
  background: #38bdf8;
  transition: width 0.3s ease;
}

.navbar nav a:hover,
.navbar nav a.active {
  color: white;
}

.navbar nav a:hover::after,
.navbar nav a.active::after {
  width: 100%;
}

/* =========================
   BUTTON
========================= */
.btn {
  background: linear-gradient(135deg, #38bdf8, #0ea5e9);
  color: white;
  padding: 1.1rem 2.8rem;
  border-radius: 50px;
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  position: relative;
  overflow: hidden;
  transition: 0.4s;
  box-shadow: 0 10px 25px rgba(56,189,248,0.35);
}

.btn:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(56,189,248,0.5);
}

.btn::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(120deg, transparent, rgba(255,255,255,0.4), transparent);
  transition: 0.6s;
}

.btn:hover::after {
  left: 100%;
}

/* =========================
   SECTION TITLE
========================= */
.section-title {
  font-size: clamp(2.8rem, 5.5vw, 3.8rem);
  font-weight: 800;
  text-align: center;
  margin-bottom: 5rem;
  position: relative;
}

.section-title::after {
  content: "";
  position: absolute;
  bottom: -18px;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 5px;
  background: linear-gradient(to right, #38bdf8, #60a5fa);
  border-radius: 5px;
}

/* =========================
   FOOTER
========================= */
.footer {
  background: #0a0f1c;
  padding: 6rem 0 3rem;
  border-top: 1px solid #1e293b;
  color: #cbd5e1;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 3.5rem 2.5rem;
  margin-bottom: 4rem;
}

.footer-col h4 {
  color: #ffffff;
  margin-bottom: 1.5rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 1rem;
}

.footer-col ul li a {
  color: #94a3b8;
  text-decoration: none;
  transition: 0.25s;
}

.footer-col ul li a:hover {
  color: #38bdf8;
}

.footer-bottom {
  text-align: center;
  padding-top: 3rem;
  border-top: 1px solid #1e293b;
  font-size: 0.95rem;
  color: #64748b;
}

/* =========================
   RESPONSIVE
========================= */
@media (max-width: 768px) {
  .navbar .container {
    flex-direction: column;
    gap: 1.4rem;
  }

  .navbar nav {
    gap: 1.8rem;
    flex-wrap: wrap;
    justify-content: center;
  }

  .footer-grid {
    text-align: center;
  }
}