:root {
  --accent: #0f172a;
  --muted: #6b7280;
  --light-bg: #f8fafc;
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  line-height: 1.6;
  color: var(--accent);
}

/* Header */
.sticky-top {
  backdrop-filter: blur(10px);
  background-color: rgba(255, 255, 255, 0.95);
}

.navbar-brand {
  font-size: 1.25rem;
  letter-spacing: .04em;
  color: var(--accent) !important;
}

.nav-link {
  color: var(--accent) !important;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-link:hover {
  color: var(--muted) !important;
}

/* Hero */
.hero {
  padding-top: 4rem;
  padding-bottom: 4rem;
  min-height: 90vh;
  display: flex;
  align-items: center;
}

.hero-image {
  max-width: 100%;
  height: auto;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
}

.hero-image:hover {
  transform: translateY(-5px);
}

/* Features */
.feature-card {
  background: white;
  border-radius: 12px;
  border: 1px solid #e5e7eb;
  transition: all 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  border-color: var(--accent);
}

.feature-icon {
  color: var(--accent);
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--light-bg);
  border-radius: 12px;
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  background: white;
  border-top: 1px solid #e5e7eb;
}

.mobile-menu.show {
  display: block;
  animation: slideDown 0.3s ease;
}

.mobile-menu a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  border-bottom: 1px solid #f1f5f9;
}

.mobile-menu a:last-child {
  border-bottom: none;
}

.mobile-menu a:hover {
  color: var(--muted);
}

/* Accordion */
.accordion-button {
  font-weight: 600;
  background: white;
  border: 1px solid #e5e7eb !important;
}

.accordion-button:not(.collapsed) {
  background: var(--light-bg);
  color: var(--accent);
  box-shadow: none;
}

/* Sections */
section {
  scroll-margin-top: 80px;
}

/* Buttons */
.btn-dark {
  background-color: var(--accent) !important;
  border-color: var(--accent) !important;
}

.btn-dark:hover {
  background-color: #1e293b !important;
  border-color: #1e293b !important;
}

.btn-outline-dark {
  color: var(--accent) !important;
  border-color: var(--accent) !important;
}

.btn-outline-dark:hover {
  background-color: var(--accent) !important;
  color: white !important;
}

/* Animations */
@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive */
@media (max-width: 768px) {
  .hero {
    padding-top: 2rem;
    padding-bottom: 2rem;
    min-height: auto;
  }
  
  .display-5 {
    font-size: 2.5rem;
  }
  
  .lead {
    font-size: 1.1rem;
  }
  
  .btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
  }
}

/* Utilities */
.bg-light {
  background-color: var(--light-bg) !important;
}

.text-muted {
  color: var(--muted) !important;
}