@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap');

:root {
  --color-primary: #ef4444; /* RSL Brand Red */
  --color-primary-hover: #dc2626;
  --color-primary-light: #fef2f2;
  --color-bg-base: #f9fafb;
  --color-bg-alt: #f3f4f6;
  --color-bg-card: #ffffff;
  --color-text-main: #111827;
  --color-text-muted: #4b5563;
  --color-text-light: #9ca3af;
  --color-white: #ffffff;
  --color-black: #000000;
  
  --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --border-radius-pill: 9999px;
  --border-radius-card: 8px;
  --max-width-content: 1200px;
}

/* Base resets */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg-base);
  color: var(--color-text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Common Layout & Container elements */
.container {
  width: 100%;
  max-width: var(--max-width-content);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

section {
  padding-top: 5rem;
  padding-bottom: 5rem;
}

@media (max-width: 768px) {
  section {
    padding-top: 3.5rem;
    padding-bottom: 3.5rem;
  }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2.25rem;
  color: var(--color-primary);
  position: relative;
  display: inline-block;
  margin-bottom: 2rem;
}

h3 {
  font-size: 1.5rem;
  margin-top: 1rem;
  margin-bottom: 0.75rem;
}

p {
  margin-bottom: 1.25rem;
  color: var(--color-text-muted);
}

p.lead {
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--color-text-main);
  max-width: 800px;
}

/* Header & Navigation */
.header {
  position: sticky;
  top: 0;
  background-color: rgba(249, 250, 251, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-bg-alt);
  z-index: 1000;
  transition: var(--transition-smooth);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--color-text-main);
}

.logo-svg {
  height: 38px;
  width: auto;
  fill: currentColor;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  text-decoration: none;
  color: var(--color-text-main);
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition-smooth);
  position: relative;
  padding: 0.5rem 0;
}

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

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

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

.nav-right {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.lang-toggle {
  background: none;
  border: 2px solid var(--color-text-main);
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 4px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.lang-toggle:hover {
  background-color: var(--color-text-main);
  color: var(--color-bg-base);
}

/* Interactive Eye Widget styling */
.eye-widget {
  position: relative;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.eye {
  position: relative;
  width: 42px;
  height: 28px;
  background-color: var(--color-primary);
  clip-path: url(#eyelidClipPath);
  -webkit-clip-path: url(#eyelidClipPath);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.eyelid {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pupil {
  position: absolute;
  width: 14px;
  height: 14px;
  background-color: var(--color-black);
  border-radius: 50%;
  transition: transform 0.05s ease-out;
}

/* Hero Section */
.hero {
  position: relative;
  background-color: var(--color-black);
  color: var(--color-white);
  padding-top: 8rem;
  padding-bottom: 8rem;
  overflow: hidden;
}

.hero-bg-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: linear-gradient(135deg, rgba(0,0,0,0.85) 0%, rgba(20,20,20,0.4) 100%), 
                    url('https://responsiblesensinglab.org/img/6412f6ea-f933-41a4-b656-2918fb4d40ea/rsl-beeldbank-001-hr-bewerkt.jpg?fm=jpg&q=80&fit=crop&w=1200&h=800');
  background-size: cover;
  background-position: center;
  opacity: 0.85;
  z-index: 1;
}

.hero .container {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 900px;
}

.hero h1 {
  color: var(--color-white);
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
  line-height: 1.15;
}

.hero p.lead {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.35rem;
  margin-bottom: 2.5rem;
}

@media (max-width: 768px) {
  .hero {
    padding-top: 5rem;
    padding-bottom: 5rem;
  }
  .hero h1 {
    font-size: 2.25rem;
  }
  .hero p.lead {
    font-size: 1.1rem;
  }
}

/* Buttons */
.btn {
  display: inline-block;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  padding: 0.85rem 2rem;
  border-radius: var(--border-radius-pill);
  transition: var(--transition-smooth);
  cursor: pointer;
  border: none;
  text-align: center;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

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

.btn-outline:hover {
  background-color: var(--color-text-main);
  color: var(--color-white);
  transform: translateY(-2px);
}

/* About / Intro Section */
.intro {
  background-color: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
}

.intro-grid {
  display: grid;
  grid-template-cols: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.intro-image-container {
  position: relative;
  border-radius: var(--border-radius-card);
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.intro-image-container img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.5s ease;
}

.intro-image-container:hover img {
  transform: scale(1.03);
}

.intro-highlights {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.intro-highlight-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.intro-highlight-icon {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 800;
  width: 28px;
  height: 28px;
  min-width: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
}

@media (max-width: 768px) {
  .intro-grid {
    grid-template-cols: 1fr;
    gap: 2.5rem;
  }
}

/* Benefits Section */
.benefits {
  background-color: var(--color-bg-base);
}

.benefits-grid {
  display: grid;
  grid-template-cols: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.benefit-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-bg-alt);
  border-radius: var(--border-radius-card);
  padding: 2.5rem 2rem;
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.benefit-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: var(--color-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition-smooth);
}

.benefit-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.05);
}

.benefit-card:hover::before {
  transform: scaleX(1);
}

.benefit-num {
  font-size: 2.5rem;
  font-weight: 800;
  color: rgba(239, 68, 68, 0.15);
  line-height: 1;
  margin-bottom: 1.5rem;
  transition: var(--transition-smooth);
}

.benefit-card:hover .benefit-num {
  color: var(--color-primary);
}

.benefit-card h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.benefit-card p {
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* The Ask / Call-to-action */
.ask-section {
  background-color: var(--color-primary-light);
  border-top: 1px solid rgba(239, 68, 68, 0.1);
  border-bottom: 1px solid rgba(239, 68, 68, 0.1);
  text-align: center;
}

.ask-box {
  max-width: 800px;
  margin: 0 auto;
}

.ask-time-pill {
  display: inline-block;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 1.1rem;
  font-weight: 700;
  padding: 0.5rem 1.5rem;
  border-radius: var(--border-radius-pill);
  margin-bottom: 2rem;
  box-shadow: 0 4px 10px rgba(239, 68, 68, 0.2);
}

.ask-box h2 {
  color: var(--color-text-main);
  margin-bottom: 1.5rem;
}

.ask-box p {
  font-size: 1.15rem;
  margin-bottom: 2.5rem;
}

/* Team Section */
.team {
  background-color: var(--color-bg-base);
}

.team-grid {
  display: grid;
  grid-template-cols: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.team-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-bg-alt);
  border-radius: var(--border-radius-card);
  padding: 2rem;
  text-align: center;
  transition: var(--transition-smooth);
}

.team-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.03);
}

.team-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background-color: var(--color-bg-alt);
  color: var(--color-primary);
  margin: 0 auto 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  font-weight: 700;
  border: 2px solid var(--color-primary-light);
  transition: var(--transition-smooth);
}

.team-card:hover .team-avatar {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.team-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.25rem;
}

.team-role {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.team-org {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Footer Section */
.footer {
  background-color: var(--color-text-main);
  color: var(--color-bg-alt);
  padding-top: 4rem;
  padding-bottom: 2rem;
  border-top: 5px solid var(--color-primary);
}

.footer-grid {
  display: grid;
  grid-template-cols: 2fr 1fr 1fr;
  gap: 4rem;
  margin-bottom: 3rem;
}

.footer-info h2 {
  color: var(--color-white);
  margin-bottom: 1.5rem;
}

.footer-logo-svg {
  height: 32px;
  fill: var(--color-white);
  margin-bottom: 1.5rem;
}

.footer-links-col h4 {
  color: var(--color-white);
  border-bottom: 1px solid var(--color-text-muted);
  padding-bottom: 0.5rem;
  margin-bottom: 1rem;
  font-size: 1rem;
}

.footer-links {
  list-style: none;
}

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

.footer-links a {
  color: var(--color-text-light);
  text-decoration: none;
  transition: var(--transition-smooth);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--color-white);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--color-text-muted);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--color-text-light);
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-cols: 1fr;
    gap: 2.5rem;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

/* Hamburger menu button for small viewports */
.menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-main);
  padding: 0.25rem;
}

@media (max-width: 768px) {
  .menu-btn {
    display: block;
  }
  
  .nav-links {
    display: none;
    position: absolute;
    top: 80px;
    left: 0;
    width: 100%;
    background-color: var(--color-bg-base);
    flex-direction: column;
    padding: 2rem;
    border-bottom: 1px solid var(--color-bg-alt);
    gap: 1.5rem;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
  }
  
  .nav-links.active {
    display: flex;
  }
}