/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Josefin+Sans:wght@700&family=Lora:wght@400;500;600&display=swap');

/* CSS Custom Properties - Brand Colors */
:root {
  --teal-lightest: #DFEBE6;
  --teal-light: #E2F5F6;
  --teal-medium: #8DB5B7;
  --teal-dark: #517E7B;
  --charcoal: #353939;
  --white: #FFFFFF;

  /* Golden Ratio Spacing Scale (φ = 1.618) */
  --space-xs: clamp(0.618rem, 2vw, 1rem);        /* ~10-16px */
  --space-sm: clamp(1rem, 2.5vw, 1.618rem);      /* 16-26px */
  --space-md: clamp(1.618rem, 3.5vw, 2.618rem);  /* 26-42px */
  --space-lg: clamp(2.618rem, 5vw, 4.236rem);    /* 42-68px */
  --space-xl: clamp(4.236rem, 7vw, 6.854rem);    /* 68-110px */
  --space-xxl: clamp(6.854rem, 10vw, 11.089rem); /* 110-177px */
}

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

body {
  font-family: 'Lora', serif;
  color: var(--charcoal);
  background-color: var(--teal-lightest);
  line-height: 1.618;  /* Golden ratio for optimal readability */
  font-size: 16px;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Josefin Sans', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 {
  font-size: 4.236rem;  /* φ³ + φ² ≈ Golden ratio scale */
  color: var(--teal-dark);
}

h2 {
  font-size: 2.618rem;  /* φ² ≈ Golden ratio scale */
  color: var(--teal-dark);
}

h3 {
  font-size: 1.618rem;  /* φ ≈ Golden ratio scale */
  color: var(--teal-dark);
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--teal-medium);
  text-decoration: none;
  transition: all 0.3s ease;
}

a:hover {
  color: var(--teal-dark);
}

/* Layout */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* Navigation */
nav {
  background-color: var(--white);
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}

nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) var(--space-md);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.logo-circle {
  width: 50px;
  height: 50px;
  display: block;
  transition: opacity 0.3s ease;
  flex-shrink: 0;
}

.logo-circle:hover {
  opacity: 0.8;
}

.logo-circle img {
  width: 100%;
  height: 100%;
  display: block;
}

.nav-title {
  font-family: 'Josefin Sans', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--teal-dark);
  text-decoration: none;
  transition: color 0.3s ease;
  line-height: 1;
  margin-top: 0.25rem;
}

.nav-title:hover {
  color: var(--teal-medium);
}

.nav-links {
  display: flex;
  gap: var(--space-md);
  list-style: none;
}

.nav-links a {
  font-family: 'Josefin Sans', sans-serif;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 0.5px;
  padding: 0.5rem 0;
  border-bottom: 2px solid transparent;
}

.nav-links a:hover,
.nav-links a.active {
  border-bottom-color: var(--teal-medium);
}

/* Mobile Navigation */
@media (max-width: 768px) {
  nav .container {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
  }

  .nav-links a {
    font-size: 0.9rem;
    padding: calc(var(--space-xs) * 0.8) var(--space-xs);
  }

  .scroll-indicator {
    font-size: 0.75rem;
    letter-spacing: 1.5px;
    bottom: calc(var(--space-xxl) * -0.2);
  }
}

/* Hero Section */
.hero {
  padding: var(--space-xxl) 0;
  text-align: center;
  background-image: url('images/hero-homepage.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
  /* Override section animation for hero - stay static */
  opacity: 1 !important;
  transform: translateY(0) !important;
  transition: none !important;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(81, 126, 123, 0.75), rgba(141, 181, 183, 0.65));
  z-index: 1;
}

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

.hero h1 {
  margin-bottom: var(--space-md);
  color: var(--white);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  font-size: clamp(2.618rem, 5vw, 4.236rem);  /* Responsive golden ratio sizing */
  line-height: 1.1;
  text-transform: uppercase;
}

.hero-text-pill {
  display: inline-block;
  background: rgba(255, 255, 255, 0.95);
  padding: var(--space-md) var(--space-lg);
  border-radius: 50px;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
  max-width: 850px;
}

.hero .mission-label {
  font-family: 'Josefin Sans', sans-serif;
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--teal-medium);
  margin-bottom: 0.75rem;
}

.mission-icon,
.section-title-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  margin: 0 auto 0.5rem auto;
  background: rgba(141, 181, 183, 0.12);
}

.mission-icon i,
.section-title-icon i {
  font-size: 1.8rem;
  color: var(--teal-medium);
}

.hero .subtitle {
  font-size: 1.25rem;
  color: var(--teal-dark);
  margin-bottom: 0;
  line-height: 1.7;
}

.hero .credentials {
  font-style: italic;
  color: var(--teal-medium);
  font-size: 1.05rem;
  margin-bottom: 0;
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: calc(var(--space-xxl) * -0.75);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--white);
  font-family: 'Josefin Sans', sans-serif;
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  animation: float 2.5s ease-in-out infinite;
  cursor: pointer;
  z-index: 3;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.scroll-indicator i {
  font-size: 0.85rem;
  transition: transform 0.3s ease;
}

.scroll-indicator:hover i {
  transform: translateX(5px);
}

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

/* Strata Divider */
.strata-divider {
  height: 6px;
  background: linear-gradient(to bottom,
    var(--teal-lightest) 0%,
    var(--teal-lightest) 25%,
    var(--teal-light) 25%,
    var(--teal-light) 50%,
    var(--teal-medium) 50%,
    var(--teal-medium) 75%,
    var(--teal-dark) 75%,
    var(--teal-dark) 100%
  );
  margin: 0;
}

.strata-divider.thick {
  height: 10px;
}

.strata-divider.thin {
  height: 4px;
}

.strata-divider.reverse {
  background: linear-gradient(to bottom,
    var(--teal-dark) 0%,
    var(--teal-dark) 25%,
    var(--teal-medium) 25%,
    var(--teal-medium) 50%,
    var(--teal-light) 50%,
    var(--teal-light) 75%,
    var(--teal-lightest) 75%,
    var(--teal-lightest) 100%
  );
}

/* Sections */
section {
  padding: var(--space-xl) 0;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

section.visible {
  opacity: 1;
  transform: translateY(0);
}

section.alt-bg {
  background-color: var(--white);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-lg);
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
  margin: var(--space-lg) 0;
}

.card {
  background: var(--white);
  border-radius: 8px;
  padding: var(--space-md);
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

.card h3 {
  color: var(--teal-medium);
  margin-bottom: 1rem;
}

/* Research Focus Cards */
.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
  margin: var(--space-lg) 0;
}

/* Services Grid - Center third card */
.services-grid {
  grid-template-columns: repeat(2, 1fr);
}

.services-grid .research-card {
  background: var(--teal-lightest);
}

.services-grid .research-card:nth-child(3) {
  grid-column: 1 / -1;
  max-width: 550px;
  justify-self: center;
}

@media (max-width: 768px) {
  .services-grid {
    grid-template-columns: 1fr;
  }

  .services-grid .research-card:nth-child(3) {
    grid-column: auto;
    max-width: none;
  }
}

.research-card {
  background: var(--white);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.research-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 8px 16px rgba(0,0,0,0.15);
}

.research-card-image {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, var(--teal-light), var(--teal-medium));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 4rem;
  overflow: hidden;
}

.research-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.research-card-content {
  padding: var(--space-md);
}

.research-card h3 {
  color: var(--teal-dark);
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

/* Quick Links */
.quick-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-sm);
  margin: var(--space-lg) 0;
}

.quick-link {
  background: var(--white);
  padding: var(--space-md);
  text-align: center;
  border-radius: 12px;
  border: 2px solid var(--teal-light);
  transition: all 0.3s ease;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.quick-link:hover {
  border-color: var(--teal-dark);
  background: var(--teal-dark);
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.quick-link:hover h3,
.quick-link:hover p {
  color: var(--white);
}

.quick-link-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin: 0 auto 0.75rem auto;
  border-radius: 999px;
  background: rgba(141, 181, 183, 0.15);
}

.quick-link-icon i {
  font-size: 1.3rem;
  color: var(--teal-medium);
}

.quick-link h3 {
  color: var(--teal-medium);
  font-size: 1.25rem;
}

/* Bio Section with Photo */
.bio-split {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-lg);
  align-items: start;
  max-width: 1000px;
  margin: 0 auto;
}

.bio-photo {
  position: sticky;
  top: 100px;
}

.bio-photo img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  border: 4px solid var(--white);
}

.bio-content {
  flex: 1;
}

.bio-content p {
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

@media (max-width: 768px) {
  .bio-split {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .bio-photo {
    position: static;
    max-width: 300px;
    margin: 0 auto;
  }
}

/* Award Badge */
.award-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: linear-gradient(135deg, var(--teal-dark), var(--teal-medium));
  color: var(--white);
  padding: 0.65rem 1.5rem;
  border-radius: 12px;
  font-family: 'Josefin Sans', sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  box-shadow: 0 4px 12px rgba(81, 126, 123, 0.3);
  margin-top: 1rem;
}

.award-badge i {
  font-size: 1.1rem;
}

/* Membership Tags */
.membership-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.membership-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--teal-lightest), var(--teal-light));
  color: var(--teal-dark);
  font-family: 'Josefin Sans', sans-serif;
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.2px;
  box-shadow: 0 3px 8px rgba(81, 126, 123, 0.2);
}

.membership-badge i {
  font-size: 0.9rem;
}

/* Stylized Quote */
.stylized-quote {
  position: relative;
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-md) 0;
}

.stylized-quote::before {
  content: '"';
  position: absolute;
  top: -0.5rem;
  left: 0;
  font-size: 6rem;
  font-family: 'Josefin Sans', sans-serif;
  color: var(--teal-medium);
  line-height: 1;
  opacity: 0.5;
}

.stylized-quote::after {
  content: '"';
  position: absolute;
  bottom: -2.5rem;
  right: 0;
  font-size: 6rem;
  font-family: 'Josefin Sans', sans-serif;
  color: var(--teal-medium);
  line-height: 1;
  opacity: 0.5;
}

@media (max-width: 768px) {
  .stylized-quote {
    padding: var(--space-sm) var(--space-md);
  }

  .stylized-quote::before,
  .stylized-quote::after {
    font-size: 4rem;
  }

  .stylized-quote::after {
    bottom: -1.5rem;
  }
}

/* Experience Lists */
.experience-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-sm);
  margin: var(--space-md) 0;
}

.experience-item {
  background: var(--white);
  padding: var(--space-sm);
  border-radius: 8px;
  border-left: 4px solid var(--teal-medium);
}

.experience-item h4 {
  color: var(--teal-dark);
  margin-bottom: 0.5rem;
}

/* CV Section */
.cv-section {
  margin: var(--space-lg) 0;
  background: var(--white);
  padding: var(--space-md);
  border-radius: 8px;
}

.cv-section h3 {
  color: var(--teal-dark);
  border-bottom: 2px solid var(--teal-light);
  padding-bottom: 0.5rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.cv-section h3 i {
  font-size: 1rem;
  color: var(--teal-medium);
  flex-shrink: 0;
}

.cv-entry {
  margin-bottom: 2rem;
  padding-left: 1rem;
  border-left: 2px solid var(--teal-light);
}

.cv-entry:last-child {
  margin-bottom: 0;
}

.cv-entry h4 {
  color: var(--teal-medium);
  font-family: 'Josefin Sans', sans-serif;
}

.cv-entry .date {
  font-style: italic;
  color: var(--teal-dark);
  font-size: 0.9rem;
}

/* Updates/Timeline */
.timeline {
  margin: var(--space-lg) 0;
}

.timeline-entry {
  background: var(--white);
  padding: var(--space-md);
  margin-bottom: var(--space-md);
  border-radius: 8px;
  border-left: 4px solid var(--teal-medium);
  position: relative;
}

.timeline-entry::before {
  content: '';
  position: absolute;
  left: -10px;
  top: 2rem;
  width: 12px;
  height: 12px;
  background: var(--teal-medium);
  border-radius: 50%;
  border: 3px solid var(--teal-lightest);
}

.timeline-date {
  font-family: 'Josefin Sans', sans-serif;
  color: var(--teal-dark);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.timeline-title {
  color: var(--teal-medium);
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

/* Contact Section */
.contact-content {
  max-width: 700px;
  margin: 0 auto;
  background: var(--white);
  padding: var(--space-lg);
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-family: 'Josefin Sans', sans-serif;
  font-weight: 700;
  color: var(--teal-dark);
}

.form-group input,
.form-group textarea {
  padding: 0.75rem;
  border: 2px solid var(--teal-light);
  border-radius: 4px;
  font-family: 'Lora', serif;
  font-size: 1rem;
  transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--teal-medium);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

button.primary-btn {
  background: var(--teal-medium);
  color: var(--white);
  padding: 1rem 2rem;
  border: none;
  border-radius: 4px;
  font-family: 'Josefin Sans', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.3s ease;
}

button.primary-btn:hover {
  background: var(--teal-dark);
}

/* CTA Button - Inverse hover effect */
.cta-button {
  display: inline-block;
  padding: 1rem 2.5rem;
  background: var(--teal-medium);
  color: var(--white);
  border-radius: 4px;
  font-family: 'Josefin Sans', sans-serif;
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
  border: 2px solid var(--teal-medium);
  transition: all 0.3s ease;
  cursor: pointer;
}

.cta-button:hover {
  background: var(--white);
  color: var(--teal-dark);
  border-color: var(--teal-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Footer */
footer {
  background: var(--charcoal);
  color: var(--teal-lightest);
  padding: var(--space-xl) 0 var(--space-md);
  margin-top: var(--space-xl);
}

footer .container {
  max-width: 1200px;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-lg);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.footer-logo {
  width: 240px;
  height: auto;
}

.footer-brand p {
  color: var(--teal-light);
  line-height: 1.8;
  margin-bottom: 0;
}

.footer-section h4 {
  font-family: 'Josefin Sans', sans-serif;
  color: var(--teal-light);
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.footer-nav {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-nav li {
  margin-bottom: 0.75rem;
}

.footer-nav a {
  color: var(--teal-lightest);
  transition: all 0.3s ease;
  display: inline-block;
}

.footer-nav a:hover {
  color: var(--white);
  transform: translateX(4px);
}

.footer-contact p {
  margin-bottom: 1rem;
  color: var(--teal-lightest);
}

.footer-contact a {
  color: var(--teal-light);
  font-weight: 500;
}

.footer-contact a:hover {
  color: var(--white);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(226, 245, 246, 0.2);
  text-align: center;
  color: var(--teal-light);
  font-size: 0.9rem;
}

@media (max-width: 768px) {
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .footer-logo {
    width: 200px;
  }
}

footer p {
  margin-bottom: 0.5rem;
}

footer a {
  color: var(--teal-light);
}

footer a:hover {
  color: var(--teal-medium);
}

/* Responsive Design */
@media (max-width: 768px) {
  h1 {
    font-size: 2.618rem;  /* Scale down using golden ratio */
  }

  h2 {
    font-size: 1.618rem;
  }

  h3 {
    font-size: 1rem;
  }

  .hero {
    padding: var(--space-xl) 0;
    min-height: 81vh;
    display: flex;
    align-items: center;
  }

  .hero h1 {
    font-size: 2.618rem;  /* Mobile golden ratio size */
  }

  section {
    padding: var(--space-lg) 0;
  }

  .container {
    padding: 0 var(--space-sm);
  }

  .card-grid,
  .research-grid {
    grid-template-columns: 1fr;
  }

  .research-output-grid {
    grid-template-columns: 1fr !important;
    gap: var(--space-sm) !important;
  }
}

/* Accordion/Details Animation */
details {
  overflow: hidden;
}

details summary {
  cursor: pointer;
  position: relative;
  transition: all 0.3s ease;
  user-select: none;
}

details summary:hover {
  opacity: 0.8;
}

details summary::marker {
  content: '';
}

details summary::before {
  content: '▼';
  position: absolute;
  right: 0;
  font-size: 0.9rem;
  transition: transform 0.3s ease;
  color: var(--teal-medium);
}

details[open] summary::before {
  transform: rotate(-180deg);
}

details[open] summary {
  margin-bottom: 1rem;
}

/* Content animation using max-height for smooth open/close */
details > div {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transform: translateY(-10px);
  transition: max-height 0.5s ease, opacity 0.4s ease, transform 0.4s ease;
}

details[open] > div {
  max-height: 3000px;
  opacity: 1;
  transform: translateY(0);
}

/* Print Styles for CV Page */
@media print {
  nav, footer {
    display: none;
  }

  body {
    background: white;
  }

  .cv-section {
    page-break-inside: avoid;
  }
}