/* ======= Variables & Resets ======= */
:root {
  /* Color Palette - Split-Complementary scheme */
  --primary-color: #2a7b9b;
  --primary-light: #4c9fbd;
  --primary-dark: #185a77;
  --secondary-color: #e65c2e;
  --secondary-light: #f87d53;
  --secondary-dark: #c64521;
  --accent-color: #8bc34a;
  --accent-light: #a4d86c;
  --accent-dark: #71a436;
  
  /* Neutral Colors */
  --white: #ffffff;
  --light-gray: #f8f9fa;
  --medium-gray: #e9ecef;
  --dark-gray: #343a40;
  --black: #212529;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  --gradient-secondary: linear-gradient(135deg, var(--secondary-color), var(--secondary-dark));
  --gradient-accent: linear-gradient(135deg, var(--accent-color), var(--accent-dark));
  
  /* Typography */
  --font-heading: 'Inter', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-medium: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 4rem;
}

/* ======= Base Styles ======= */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--black);
  line-height: 1.6;
  overflow-x: hidden;
  background-color: var(--white);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

p {
  margin-bottom: 1.5rem;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-dark);
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
}

/* ======= Utility Classes ======= */
.text-primary { color: var(--primary-color) !important; }
.text-secondary { color: var(--secondary-color) !important; }
.text-accent { color: var(--accent-color) !important; }

.bg-primary { background-color: var(--primary-color) !important; }
.bg-secondary { background-color: var(--secondary-color) !important; }
.bg-accent { background-color: var(--accent-color) !important; }
.bg-light { background-color: var(--light-gray) !important; }
.bg-dark { background-color: var(--dark-gray) !important; }

.shadow-hover {
  transition: box-shadow var(--transition-medium), transform var(--transition-medium);
}

.shadow-hover:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-5px);
}

/* Glassmorphism effect */
.glass {
  background: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
}

/* ======= Layout & Components ======= */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

/* Buttons */
.btn,
button,
input[type="submit"] {
  display: inline-block;
  font-weight: 600;
  text-align: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-medium);
  font-family: var(--font-heading);
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background: rgba(255, 255, 255, 0.1);
  transition: all 0.3s;
  z-index: -1;
}

.btn:hover::before {
  width: 100%;
}

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

.btn-primary:hover {
  background-color: var(--primary-dark);
  color: var(--white);
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.btn-secondary {
  background-color: var(--secondary-color);
  color: var(--white);
}

.btn-secondary:hover {
  background-color: var(--secondary-dark);
  color: var(--white);
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.btn-outline-light {
  background-color: transparent;
  border: 2px solid var(--white);
  color: var(--white);
}

.btn-outline-light:hover {
  background-color: var(--white);
  color: var(--primary-color);
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.btn-outline-primary {
  background-color: transparent;
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
}

.btn-outline-primary:hover {
  background-color: var(--primary-color);
  color: var(--white);
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.125rem;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

/* ======= Header & Navigation ======= */
header {
  transition: background-color var(--transition-medium);
  width: 100%;
  z-index: 1000;
}

.navbar {
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.navbar-brand {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 1px;
  font-family: var(--font-heading);
}

.navbar-dark .navbar-brand {
  color: var(--white);
}

.navbar-dark .navbar-nav .nav-link {
  color: rgba(255, 255, 255, 0.85);
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

.navbar-toggler {
  border: none;
  padding: 0.5rem;
}

/* ======= Hero Section ======= */
.hero-section {
  position: relative;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  color: var(--white);
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.7));
  z-index: 1;
}

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

.hero-section h1 {
  margin-bottom: 1.5rem;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  animation: fadeInUp 1s ease-out;
}

.hero-section p {
  margin-bottom: 2rem;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
  animation: fadeInUp 1.2s ease-out;
}

.hero-section .btn {
  animation: fadeInUp 1.4s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ======= Services Section ======= */
.service-card {
  height: 100%;
  border: none;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-medium), box-shadow var(--transition-medium);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.card-image {
  overflow: hidden;
  height: 250px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-img-top {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-medium);
}

.service-card:hover .card-img-top {
  transform: scale(1.05);
}

.card-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-title {
  color: var(--primary-dark);
  margin-bottom: 1rem;
  font-weight: 700;
}

.card-text {
  color: var(--black);
  margin-bottom: 1.5rem;
}

/* ======= Methodology Section ======= */
.methodology-image {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transform: perspective(1000px) rotateY(-5deg);
  transition: transform var(--transition-medium);
}

.methodology-image:hover {
  transform: perspective(1000px) rotateY(0deg);
}

.accordion-button {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--primary-color);
  background-color: var(--white);
  box-shadow: none;
  padding: 1.25rem;
}

.accordion-button:not(.collapsed) {
  color: var(--primary-color);
  background-color: rgba(42, 123, 155, 0.05);
}

.accordion-button:focus {
  box-shadow: none;
  border-color: rgba(42, 123, 155, 0.25);
}

.accordion-button::after {
  background-size: 1rem;
  transition: transform var(--transition-fast);
}

.accordion-body {
  padding: 1.25rem;
  background-color: var(--white);
}

/* ======= Research Section ======= */
.research-card {
  border: none;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-medium), box-shadow var(--transition-medium);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.research-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.research-card .card-img-top {
  height: 300px;
  object-fit: cover;
}

/* ======= Events Calendar Section ======= */
.event-card {
  border: none;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-medium), box-shadow var(--transition-medium);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.event-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.event-card .badge {
  font-weight: 500;
  font-size: 0.75rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
}

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

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

/* ======= Careers Section ======= */
.career-image {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transform: perspective(1000px) rotateY(5deg);
  transition: transform var(--transition-medium);
}

.career-image:hover {
  transform: perspective(1000px) rotateY(0deg);
}

/* ======= Contact Section ======= */
.contact-info, .contact-form {
  height: 100%;
  border-radius: var(--radius-md);
  transition: transform var(--transition-medium), box-shadow var(--transition-medium);
}

.contact-info:hover, .contact-form:hover {
  box-shadow: var(--shadow-md);
}

.contact-info i {
  color: var(--primary-color);
}

.form-control, .form-select {
  border: 1px solid #ced4da;
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  font-family: var(--font-body);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus, .form-select:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 0.2rem rgba(42, 123, 155, 0.25);
}

/* ======= Footer ======= */
.footer {
  background-color: var(--dark-gray);
  color: var(--white);
  padding: 4rem 0 2rem;
}

.footer h3 {
  color: var(--white);
  margin-bottom: 1.5rem;
  font-weight: 600;
}

.footer p {
  color: rgba(255, 255, 255, 0.8);
}

.footer a {
  color: var(--white);
  transition: color var(--transition-fast);
}

.footer a:hover {
  color: var(--secondary-light);
  text-decoration: none;
}

.footer .input-group {
  margin-bottom: 1.5rem;
}

.footer .input-group .form-control {
  border: none;
}

.footer .input-group .btn {
  background-color: var(--secondary-color);
  border-color: var(--secondary-color);
  color: var(--white);
}

.footer .input-group .btn:hover {
  background-color: var(--secondary-dark);
  border-color: var(--secondary-dark);
}

.footer hr {
  background-color: rgba(255, 255, 255, 0.1);
}

/* Social Links */
.footer .d-flex a {
  color: var(--white);
  margin-right: 1rem;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.footer .d-flex a:hover {
  color: var(--secondary-light);
  transform: translateY(-3px);
}

/* ======= Success Page ======= */
.success-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
}

.success-content {
  max-width: 600px;
  padding: 3rem;
  background-color: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
}

.success-icon {
  color: var(--accent-color);
  font-size: 4rem;
  margin-bottom: 1.5rem;
}

/* ======= Privacy & Terms Pages ======= */
.privacy-page, .terms-page {
  padding-top: 100px;
  min-height: 100vh;
}

.privacy-content, .terms-content {
  padding: 2rem;
  background-color: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

/* ======= Cookie Consent ======= */
#cookieConsent {
  background-color: rgba(0, 0, 0, 0.85);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

/* ======= About Page ======= */
.about-hero {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  padding: 150px 0 100px;
  position: relative;
  color: var(--white);
}

.about-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.7));
  z-index: 1;
}

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

.team-member {
  text-align: center;
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.team-member img {
  width: 200px;
  height: 200px;
  object-fit: cover;
  border-radius: 50%;
  margin-bottom: 1rem;
  border: 4px solid var(--white);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-medium);
}

.team-member:hover img {
  transform: scale(1.05);
}

.team-member h3 {
  margin-bottom: 0.5rem;
  color: var(--primary-color);
}

.team-member p {
  color: var(--dark-gray);
}

/* ======= Media Queries ======= */
@media (max-width: 991.98px) {
  .navbar-collapse {
    background-color: var(--dark-gray);
    padding: 1rem;
    border-radius: var(--radius-md);
  }
  
  .hero-section {
    text-align: center;
  }
  
  .methodology-image, .career-image {
    margin-bottom: 2rem;
    transform: none;
  }
  
  .methodology-image:hover, .career-image:hover {
    transform: none;
  }
}

@media (max-width: 767.98px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  .hero-section {
    padding: 100px 0 50px;
  }
}

/* ======= Animations ======= */
@keyframes pulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
  100% {
    transform: scale(1);
  }
}

@keyframes float {
  0% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
  100% {
    transform: translateY(0px);
  }
}

.pulse {
  animation: pulse 2s infinite;
}

.float {
  animation: float 4s ease-in-out infinite;
}

/* 3D Effects */
.card {
  transition: transform 0.5s ease, box-shadow 0.5s ease;
}

.card:hover {
  transform: translateY(-10px) rotateX(5deg);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

/* Add parallax scrolling effect to hero section */
.parallax {
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}