/* style.css */

/*--------------------------------------------------------------
# CSS Variables
--------------------------------------------------------------*/
:root {
  /* Colors */
  --color-background: #e0e5ec;
  --color-text: #333d4b;
  --color-text-secondary: #5f6c7d;
  --color-primary: #0077b6;
  --color-primary-dark: #005f92;
  --color-white: #ffffff;
  --color-black: #000000;
  --color-border: #d1d9e6;

  /* Fonts */
  --font-primary: 'Source Sans Pro', sans-serif;
  --font-secondary: 'Playfair Display', serif;

  /* Neumorphism Shadows */
  --shadow-light: #ffffff;
  --shadow-dark: #a3b1c6;
  --neumorphic-shadow: 8px 8px 15px var(--shadow-dark), -8px -8px 15px var(--shadow-light);
  --neumorphic-shadow-inset: inset 8px 8px 15px var(--shadow-dark), inset -8px -8px 15px var(--shadow-light);
  --neumorphic-shadow-hover: 12px 12px 20px var(--shadow-dark), -12px -12px 20px var(--shadow-light);

  /* Transitions */
  --transition-smooth: all 0.3s ease-in-out;
}

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

body {
  font-family: var(--font-primary);
  background-color: var(--color-background);
  color: var(--color-text);
  line-height: 1.7;
}

/*--------------------------------------------------------------
# Typography & Headings
--------------------------------------------------------------*/
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-secondary);
  color: #222222;
  font-weight: 700;
}

/* Adaptive Typography */
h1 { font-size: clamp(2.5rem, 5vw, 4.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); text-shadow: 1px 1px 3px rgba(0,0,0,0.1); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
p { font-size: clamp(1rem, 1.5vw, 1.1rem); }

.section-title {
  text-align: center;
  margin-bottom: 1rem;
}

.section-subtitle {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 2rem auto;
  color: var(--color-text-secondary);
}

/*--------------------------------------------------------------
# Header & Navigation
--------------------------------------------------------------*/
header {
  background-color: rgba(224, 229, 236, 0.95);
  transition: var(--transition-smooth);
}

header.scrolled {
  background-color: rgba(224, 229, 236, 0.95);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
  backdrop-filter: blur(5px);
}

.nav-link {
  position: relative;
  color: var(--color-text);
  font-weight: 600;
  padding: 0.5rem 0;
  transition: var(--transition-smooth);
}

.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-primary);
  transition: var(--transition-smooth);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link-button {
  padding: 0.5rem 1.5rem;
  border-radius: 50px;
  background-color: var(--color-primary);
  color: var(--color-white);
  box-shadow: var(--neumorphic-shadow);
  transition: var(--transition-smooth);
}

.nav-link-button:hover {
  background-color: var(--color-primary-dark);
  box-shadow: var(--neumorphic-shadow-inset);
  transform: translateY(2px);
}

/*--------------------------------------------------------------
# Neumorphic Components
--------------------------------------------------------------*/
/* Buttons */
.neumorphic-button-light, .neumorphic-button-dark {
  display: inline-block;
  padding: 1rem 2.5rem;
  border-radius: 50px;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  border: none;
  transition: var(--transition-smooth);
}

.neumorphic-button-light {
  background: var(--color-background);
  color: var(--color-text);
  box-shadow: var(--neumorphic-shadow);
}

.neumorphic-button-dark {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: var(--neumorphic-shadow);
}

.neumorphic-button-light:hover, .neumorphic-button-dark:hover {
  transform: translateY(-2px);
}

.neumorphic-button-light:active, .neumorphic-button-dark:active {
  box-shadow: var(--neumorphic-shadow-inset);
  transform: translateY(2px);
}

/* Cards */
.neumorphic-card, .card {
  background: var(--color-background);
  border-radius: 20px;
  padding: 2rem;
  box-shadow: var(--neumorphic-shadow);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

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

/* Inputs & Forms */
.neumorphic-input {
  width: 100%;
  padding: 1rem;
  border: none;
  border-radius: 15px;
  background-color: var(--color-background);
  box-shadow: var(--neumorphic-shadow-inset);
  color: var(--color-text);
  font-size: 1rem;
  transition: var(--transition-smooth);
}

.neumorphic-input:focus {
  outline: none;
  box-shadow: inset 5px 5px 10px var(--shadow-dark), inset -5px -5px 10px var(--shadow-light),
              2px 2px 5px var(--shadow-dark), -2px -2px 5px var(--shadow-light);
}

/*--------------------------------------------------------------
# Sections
--------------------------------------------------------------*/
/* Hero Section */
#hero {
  color: var(--color-white);
}

.hero-text {
  text-shadow: 2px 2px 8px rgba(0,0,0,0.7);
}

.parallax-bg {
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}

/* Research Section (Timeline) */
.timeline-item, .timeline-item-right {
  position: relative;
  width: 50%;
  margin-bottom: 50px;
  padding: 0 40px;
}
.timeline-item { left: 0; text-align: right; }
.timeline-item-right { left: 50%; text-align: left; }
.timeline-dot {
  position: absolute;
  top: 10px;
  width: 20px;
  height: 20px;
  background-color: var(--color-primary);
  border-radius: 50%;
  border: 4px solid var(--color-background);
  z-index: 10;
}
.timeline-item .timeline-dot { right: -10px; }
.timeline-item-right .timeline-dot { left: -10px; }
.timeline-content {
  padding: 20px 30px;
  background: var(--color-background);
  border-radius: 10px;
  box-shadow: var(--neumorphic-shadow);
}
.timeline-date {
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 10px;
  display: inline-block;
}
@media screen and (max-width: 768px) {
  .timeline-item, .timeline-item-right { width: 100%; left: 0; padding-left: 70px; padding-right: 25px; text-align: left; }
  .timeline-item .timeline-dot, .timeline-item-right .timeline-dot { left: 15px; }
}

/* Resources Section (Accordion) */
.accordion-header {
  width: 100%;
  padding: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: none;
  background: none;
  cursor: pointer;
  text-align: left;
}
.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s ease-out, padding 0.5s ease-out;
  padding: 0 1.5rem;
  color: var(--color-text-secondary);
}
.accordion-content.open {
  max-height: 500px;
  padding: 0 1.5rem 1.5rem 1.5rem;
}
.accordion-icon {
  font-size: 1.5rem;
  font-weight: 300;
  transition: transform 0.3s ease;
}
.accordion-header.active .accordion-icon {
  transform: rotate(45deg);
}

/* Card and Gallery Styles */
.card .card-image,
.gallery-item .card-image {
    width: 100%;
    height: 200px; /* Fixed height for consistent card appearance */
    overflow: hidden;
    border-radius: 15px;
    margin-bottom: 1rem;
    box-shadow: var(--neumorphic-shadow-inset);
}
.card .card-image img,
.gallery-item .card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.card:hover .card-image img,
.gallery-item:hover .card-image img {
    transform: scale(1.05);
}
.team-card .card-image {
    width: 128px;
    height: 128px;
    border-radius: 50%;
}
.team-card .card-content {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

/*--------------------------------------------------------------
# Footer
--------------------------------------------------------------*/
footer {
    border-top: 2px solid var(--color-border);
}

.footer-link {
    color: var(--color-text-secondary);
    transition: var(--transition-smooth);
    text-decoration: none;
}

.footer-link:hover {
    color: var(--color-primary);
}

/*--------------------------------------------------------------
# Animation & Page Transitions
--------------------------------------------------------------*/
/* Scroll Animation */
.scroll-animate {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.scroll-animate.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Barba.js Transitions */
.fade-leave-active,
.fade-enter-active {
  transition: opacity 0.5s;
}
.fade-leave-to,
.fade-enter-from {
  opacity: 0;
}

/*--------------------------------------------------------------
# Specific Page Styles
--------------------------------------------------------------*/
/* About, Terms, Privacy pages */
#page-content {
  padding-top: 120px;
  padding-bottom: 60px;
}
#page-content h2 {
  margin-bottom: 1.5rem;
}
#page-content p, #page-content ul {
  margin-bottom: 1.5rem;
  color: var(--color-text-secondary);
}
#page-content ul {
  list-style: disc;
  padding-left: 2rem;
}

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