/* Main stylesheet for Open Targets Hackathon website */

:root {
  --background: hsl(210, 40%, 98%);
  --foreground: hsl(210, 38%, 15%);
  --card: hsl(0, 0%, 100%);
  --card-foreground: hsl(210, 38%, 15%);
  --popover: hsl(0, 0%, 100%);
  --popover-foreground: hsl(210, 38%, 15%);
  --primary: hsl(201, 57%, 50%);
  --primary-foreground: hsl(210, 40%, 98%);
  --secondary: hsl(182, 49%, 63%);
  --secondary-foreground: hsl(210, 38%, 15%);
  --muted: hsl(210, 20%, 96%);
  --muted-foreground: hsl(215, 16%, 47%);
  --accent: hsl(43, 100%, 65%);
  --accent-foreground: hsl(210, 38%, 15%);
  --destructive: hsl(0, 72%, 51%);
  --destructive-foreground: hsl(210, 40%, 98%);
  --border: hsl(214, 32%, 91%);
  --input: hsl(214, 32%, 91%);
  --ring: hsl(201, 57%, 50%);
  --radius: 0.5rem;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Oxygen, Ubuntu, Cantarell, sans-serif;
  color: var(--foreground);
  background-color: var(--background);
  position: relative;
}

/* Navbar Styles */
.navbar {
  transition: all 0.3s ease;
  padding: 1rem 2rem;
}

.navbar.scrolled {
  background-color: var(--card) !important;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  padding: 0.5rem 2rem;
}

.navbar-brand img {
  height: 40px;
}

.navbar-light .navbar-nav .nav-link {
  color: var(--foreground);
}

.navbar-light .navbar-nav .nav-link:hover {
  color: var(--primary);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  background: linear-gradient(135deg, var(--background) 0%, var(--muted) 100%);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
}

.hero-content {
  z-index: 2;
  position: relative;
}

.floating-element {
  position: absolute;
  border-radius: 50%;
  opacity: 0.2;
  z-index: 0;
  background: linear-gradient(45deg, var(--primary), var(--secondary));
  animation: float 20s infinite alternate ease-in-out;
}

.floating-element:nth-child(1) {
  width: 300px;
  height: 300px;
  top: -150px;
  right: -100px;
  animation-delay: 0s;
}

.floating-element:nth-child(2) {
  width: 200px;
  height: 200px;
  bottom: -100px;
  left: 10%;
  animation-delay: 5s;
}

.floating-element:nth-child(3) {
  width: 150px;
  height: 150px;
  top: 20%;
  left: -75px;
  animation-delay: 10s;
}

@keyframes float {
  0% {
    transform: translate(0, 0) rotate(0deg);
  }
  50% {
    transform: translate(20px, 20px) rotate(5deg);
  }
  100% {
    transform: translate(-20px, 10px) rotate(-5deg);
  }
}

/* Section Styles */
section {
  padding: 5rem 0;
}

.section-heading {
  margin-bottom: 3rem;
  position: relative;
  display: inline-block;
  color: var(--foreground);
}

.section-heading::after {
  content: "";
  position: absolute;
  width: 50px;
  height: 4px;
  background-color: var(--accent);
  bottom: -10px;
  left: 0;
}

.bg-light {
  background-color: var(--muted) !important;
}

/* Timeline */
.timeline {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
}

.timeline::after {
  content: "";
  position: absolute;
  width: 6px;
  background-color: var(--primary);
  top: 0;
  bottom: 0;
  left: 60px;
  border-radius: 10px;
}

.timeline-item {
  padding: 10px 40px 10px 120px;
  position: relative;
  width: 100%;
  box-sizing: border-box;
  margin-bottom: 30px;
}

.timeline-item::after {
  content: "";
  position: absolute;
  width: 25px;
  height: 25px;
  left: 48px;
  top: 20px;
  border-radius: 50%;
  background-color: var(--card);
  border: 4px solid var(--primary);
  z-index: 1;
}

.timeline-content {
  padding: 20px 30px;
  background-color: var(--card);
  position: relative;
  border-radius: var(--radius);
  box-shadow: 0 3px 15px rgba(0, 0, 0, 0.1);
}

.timeline-date {
  font-weight: bold;
  color: var(--primary);
  margin-bottom: 5px;
}

/* Cards */
.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  height: 100%;
  background-color: var(--card);
  color: var(--card-foreground);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.card-header {
  background-color: var(--primary);
  color: var(--primary-foreground);
  border-radius: calc(var(--radius) - 1px) calc(var(--radius) - 1px) 0 0 !important;
  font-weight: 600;
}

/* Buttons */
.btn-primary {
  background-color: var(--primary);
  border-color: var(--primary);
  padding: 10px 25px;
  border-radius: var(--radius);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: all 0.3s ease;
  color: var(--primary-foreground);
}

.btn-primary:hover {
  background-color: hsl(201, 57%, 45%);
  border-color: hsl(201, 57%, 45%);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px hsla(201, 57%, 50%, 0.3);
}

.btn-outline-primary {
  color: var(--primary);
  border-color: var(--primary);
  padding: 10px 25px;
  border-radius: var(--radius);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: all 0.3s ease;
  background-color: transparent;
}

.btn-outline-primary:hover {
  background-color: var(--primary);
  color: var(--primary-foreground);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px hsla(201, 57%, 50%, 0.3);
}

.badge-primary {
  background-color: var(--primary);
  color: var(--primary-foreground);
}

/* FAQ Accordion */
.faq-accordion .card {
  border: 1px solid var(--border);
  margin-bottom: 15px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.faq-accordion .card-header {
  background-color: var(--card);
  border: none;
  padding: 0;
}

.faq-accordion .btn-link {
  color: var(--foreground);
  font-weight: 600;
  text-decoration: none;
  text-align: left;
  display: block;
  width: 100%;
  padding: 20px;
  position: relative;
}

.faq-accordion .btn-link:hover {
  color: var(--primary);
}

.faq-accordion .btn-link::after {
  content: "\f107";
  font-family: "Font Awesome 5 Free";
  position: absolute;
  right: 20px;
  transition: transform 0.3s ease;
}

.faq-accordion .btn-link.collapsed::after {
  transform: rotate(-90deg);
}

.faq-accordion .card-body {
  color: var(--card-foreground);
}

/* Registration Tabs */
.registration-tabs .nav-tabs {
  border: none;
  margin-bottom: 30px;
}

.registration-tabs .nav-tabs .nav-link {
  border: none;
  background-color: var(--muted);
  border-radius: var(--radius);
  padding: 10px 30px;
  margin-right: 10px;
  color: var(--muted-foreground);
  font-weight: 600;
  transition: all 0.3s ease;
}

.registration-tabs .nav-tabs .nav-link.active {
  background-color: var(--primary);
  color: var(--primary-foreground);
}

/* Footer */
footer {
  background-color: var(--foreground);
  color: var(--background);
  padding: 4rem 0 2rem;
}

footer a {
  color: var(--muted);
  transition: color 0.3s ease;
}

footer a:hover {
  color: var(--background);
  text-decoration: none;
}

.footer-heading {
  color: var(--background);
  font-weight: 600;
  margin-bottom: 1.5rem;
  position: relative;
  display: inline-block;
}

.footer-heading::after {
  content: "";
  position: absolute;
  width: 30px;
  height: 3px;
  background-color: var(--accent);
  bottom: -8px;
  left: 0;
}

.social-icons a {
  display: inline-block;
  width: 40px;
  height: 40px;
  background-color: rgba(0, 37, 89, 0.1);
  color: var(--background);
  border-radius: 50%;
  text-align: center;
  line-height: 40px;
  margin-right: 10px;
  transition: all 0.3s ease;
}

.social-icons a:hover {
  background-color: var(--primary);
  transform: translateY(-3px);
}

/* Responsive adjustments */
@media (max-width: 991.98px) {
  .timeline::after {
    left: 30px;
  }

  .timeline-item {
    padding-left: 70px;
    padding-right: 25px;
  }

  .timeline-item::after {
    left: 18px;
    top: 20px;
  }
}

@media (max-width: 767.98px) {
  .hero {
    text-align: center;
  }

  .section-heading::after {
    left: 50%;
    transform: translateX(-50%);
  }

  .hero .btn {
    margin-bottom: 10px;
  }
}