:root {
  --brand-900: #061a3a;
  --brand-800: #0a2b59;
  --brand-700: #0f3d7a;
  --accent: #2f80ed;
  --text-900: #0d1b2a;
  --text-700: #3f4d63;
  --white: #ffffff;
  --surface: #f5f8ff;
  --radius: 16px;
  --shadow: 0 12px 30px rgba(10, 43, 89, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Manrope", sans-serif;
  color: var(--text-900);
  background: linear-gradient(135deg, #f3f7ff 0%, #ffffff 60%);
  line-height: 1.7;
}

h1, h2, h3, h4, .navbar-brand {
  font-family: "Space Grotesk", sans-serif;
}

.navbar {
  background: rgba(6, 26, 58, 0.88);
  backdrop-filter: blur(8px);
  padding: 0.8rem 0;
  transition: all 0.3s ease;
}

.navbar.scrolled {
  background: rgba(6, 26, 58, 0.97);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
}

.navbar .nav-link {
  color: rgba(255, 255, 255, 0.86);
  font-weight: 600;
}

.navbar .nav-link.active,
.navbar .nav-link:hover {
  color: var(--white);
}

.hero-section {
  min-height: 82vh;
  padding: 105px 0 70px;
  position: relative;
  color: var(--white);
  background:
    radial-gradient(circle at 78% 20%, rgba(47, 128, 237, 0.35), transparent 35%),
    radial-gradient(circle at 15% 80%, rgba(8, 90, 180, 0.28), transparent 40%),
    linear-gradient(160deg, var(--brand-900), var(--brand-800) 45%, var(--brand-700));
  overflow: hidden;
}

.hero-intro {
  font-size: 1.15rem;
  opacity: 0.9;
}

.hero-title {
  font-size: clamp(2.2rem, 6vw, 4.4rem);
  font-weight: 800;
  margin-bottom: 0.35rem;
}

.hero-role {
  font-size: clamp(1.2rem, 2.8vw, 2rem);
  font-weight: 600;
  color: #d9e7ff;
  margin-bottom: 1rem;
}

.hero-tagline {
  font-size: 1.15rem;
  max-width: 680px;
  margin-bottom: 2rem;
  color: #e6efff;
}

.btn {
  border-radius: 999px;
  font-weight: 700;
  padding: 0.72rem 1.25rem;
}

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

.btn-primary:hover {
  background-color: #216fd8;
  border-color: #216fd8;
}

.section-pad {
  padding: 64px 0;
}

.section-alt {
  background: var(--surface);
}

.section-title-wrap {
  margin-bottom: 2rem;
}

.section-title {
  font-size: clamp(1.6rem, 3.2vw, 2.3rem);
  margin: 0;
  color: var(--brand-900);
}

.card-custom {
  background: var(--white);
  border: 1px solid rgba(10, 43, 89, 0.08);
  border-radius: var(--radius);
  padding: 1.45rem;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card-custom:hover {
  transform: translateY(-5px);
  box-shadow: 0 14px 35px rgba(10, 43, 89, 0.18);
}

.card-custom h4 {
  font-size: 1.15rem;
  color: var(--brand-800);
  margin-bottom: 1rem;
}

.card-custom ul {
  padding-left: 1.1rem;
  margin: 0;
}

.timeline {
  position: relative;
  margin-left: 0.6rem;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 10px;
  width: 2px;
  background: linear-gradient(var(--brand-700), rgba(10, 43, 89, 0.2));
}

.timeline-item {
  position: relative;
  padding-left: 2.5rem;
  margin-bottom: 1.4rem;
}

.timeline-dot {
  position: absolute;
  left: 2px;
  top: 16px;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid #d8e9ff;
}

.timeline-item h4 span {
  color: var(--text-700);
  font-size: 0.95rem;
  font-weight: 600;
}

.project-icon {
  font-size: 1.6rem;
  color: var(--accent);
  margin-bottom: 0.9rem;
}

.form-control {
  border-radius: 12px;
  border: 1px solid rgba(10, 43, 89, 0.2);
  padding: 0.7rem 0.95rem;
}

.form-control:focus {
  box-shadow: 0 0 0 0.2rem rgba(47, 128, 237, 0.2);
  border-color: var(--accent);
}

.footer {
  background: var(--brand-900);
  color: #cfdef8;
}

.social-links a {
  color: #e8f0ff;
  margin-left: 0.9rem;
  font-size: 1.15rem;
  transition: color 0.3s ease;
}

.social-links a:hover {
  color: #78afff;
}

.fade-up {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.delay-1 { transition-delay: 0.08s; }
.delay-2 { transition-delay: 0.16s; }
.delay-3 { transition-delay: 0.24s; }
.delay-4 { transition-delay: 0.32s; }

@media (max-width: 991.98px) {
  .hero-section {
    min-height: auto;
    padding-top: 96px;
  }

  .hero-actions .btn {
    margin-right: 0 !important;
  }
}

@media (max-width: 767.98px) {
  .section-pad {
    padding: 52px 0;
  }

  .timeline {
    margin-left: 0;
  }

  .timeline-item {
    padding-left: 2rem;
  }
}