:root {
  --dk-primary: #1d4ed8;
  --dk-primary-600: #1e40af;
  --dk-accent: #06b6d4;
  --dk-success: #16a34a;
  --dk-warning: #f59e0b;

  --dk-bg: #ffffff;
  --dk-bg-soft: #f6f8fc;
  --dk-text: #0f172a;
  --dk-muted: #475569;
  --dk-border: #e2e8f0;

  --dk-radius-sm: 10px;
  --dk-radius: 14px;
  --dk-radius-lg: 18px;

  --dk-shadow-sm: 0 6px 18px rgba(15, 23, 42, 0.08);
  --dk-shadow: 0 10px 30px rgba(15, 23, 42, 0.10);
  --dk-shadow-lg: 0 18px 50px rgba(15, 23, 42, 0.14);

  --dk-ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

body {
  color: var(--dk-text);
  background: var(--dk-bg);
  line-height: 1.6;
  font-family: 'Jost', sans-serif;
}

h1, h2, h3, h4, h5, h6 {
  letter-spacing: -0.02em;
  color: var(--dk-text);
}

.btn-primary {
  background-color: var(--dk-primary) !important;
  border-color: var(--dk-primary) !important;
  font-weight: 600;
  border-radius: var(--dk-radius-sm);
}

.btn-primary:hover {
  background-color: var(--dk-primary-600) !important;
  border-color: var(--dk-primary-600) !important;
}

.btn-outline-secondary {
  border-color: var(--dk-border) !important;
  color: var(--dk-text) !important;
  border-radius: var(--dk-radius-sm);
}

.btn-outline-secondary:hover {
  background: var(--dk-bg-soft) !important;
  border-color: var(--dk-primary) !important;
}

.btn-light {
  background: var(--dk-bg) !important;
  color: var(--dk-primary) !important;
  border-radius: var(--dk-radius-sm);
  font-weight: 600;
}

.btn-light:hover {
  background: #f0f4ff !important;
}

.dk-section {
  padding: 90px 0;
}

.dk-section--soft {
  background: var(--dk-bg-soft);
}

.dk-hero {
  padding-top: 120px;
  padding-bottom: 80px;
  background:
    radial-gradient(900px 500px at 10% 10%, rgba(29, 78, 216, 0.10), transparent 60%),
    radial-gradient(900px 500px at 90% 20%, rgba(6, 182, 212, 0.10), transparent 55%),
    linear-gradient(180deg, #fff, #f8fafc);
}

.dk-card {
  background: #fff;
  border: 1px solid var(--dk-border);
  border-radius: var(--dk-radius-lg);
  box-shadow: var(--dk-shadow-sm);
  padding: 34px 28px;
  transition:
    transform 0.25s var(--dk-ease),
    box-shadow 0.25s var(--dk-ease),
    border-color 0.25s var(--dk-ease);
}

.dk-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--dk-shadow-lg);
  border-color: rgba(29, 78, 216, 0.25);
}

.dk-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--dk-radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.7rem;
  border: 1px solid var(--dk-border);
  background: #fff;
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.06);
}

.dk-icon--primary {
  color: var(--dk-primary);
  background: rgba(29, 78, 216, 0.08);
  border-color: rgba(29, 78, 216, 0.18);
}

.dk-icon--success {
  color: var(--dk-success);
  background: rgba(22, 163, 74, 0.10);
  border-color: rgba(22, 163, 74, 0.22);
}

.dk-icon--warning {
  color: var(--dk-warning);
  background: rgba(245, 158, 11, 0.12);
  border-color: rgba(245, 158, 11, 0.25);
}

.dk-icon--accent {
  color: var(--dk-accent);
  background: rgba(6, 182, 212, 0.12);
  border-color: rgba(6, 182, 212, 0.25);
}

.navbar {
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.95) !important;
  border-bottom: 1px solid var(--dk-border);
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--dk-text) !important;
}

.nav-link {
  color: var(--dk-muted) !important;
  font-weight: 500;
  transition: color 0.25s var(--dk-ease);
}

.nav-link.active,
.nav-link:hover {
  color: var(--dk-primary) !important;
}

footer {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: #94a3b8;
}

footer a {
  color: #cbd5e1;
  transition: color 0.25s var(--dk-ease);
}

footer a:hover {
  color: var(--dk-accent);
}

footer h4,
footer h5 {
  color: #f1f5f9;
}

.text-center-mobile {
  text-align: left;
}

@media (max-width: 768px) {
  .dk-section {
    padding: 60px 0;
  }

  .dk-hero {
    padding-top: 80px;
    padding-bottom: 60px;
  }

  .text-center-mobile {
    text-align: center;
  }
}