:root {
  --font-primary: "Poppins", sans-serif;
  --font-secondary: "Roboto", sans-serif;

  --color-primary: #007bff;
  --color-primary-dark: #0056b3;
  --color-primary-light: #66b2ff;

  --color-secondary: #4caf50;

  --color-background-light: #f9fafb;
  --color-surface-light: #ffffff;
  --color-text-light: #1f2937;
  --color-text-muted-light: #6b7280;
  --color-border-light: #e5e7eb;

  --color-background-dark: #111827;
  --color-surface-dark: #1f2937;
  --color-text-dark: #f9fafb;
  --color-text-muted-dark: #9ca3af;
  --color-border-dark: #374151;

  --background: var(--color-background-light);
  --surface: var(--color-surface-light);
  --text-color: var(--color-text-light);
  --text-muted: var(--color-text-muted-light);
  --border-color: var(--color-border-light);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
    0 4px 6px -2px rgba(0, 0, 0, 0.05);

  --border-radius-sm: 0.3rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 0.8rem;

  --transition-fast: 0.2s ease-in-out;
  --transition-medium: 0.4s ease-in-out;

  --container-width: 1280px;
  --container-padding: 1.5rem;
}

.dark-theme {
  --background: var(--color-background-dark);
  --surface: var(--color-surface-dark);
  --text-color: var(--color-text-dark);
  --text-muted: var(--color-text-muted-dark);
  --border-color: var(--color-border-dark);
}

@media (prefers-color-scheme: dark) {
  :root:not(.light-theme) {
    --background: var(--color-background-dark);
    --surface: var(--color-surface-dark);
    --text-color: var(--color-text-dark);
    --text-muted: var(--color-text-muted-dark);
    --border-color: var(--color-border-dark);
  }
}

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

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

body {
  font-family: var(--font-secondary);
  background-color: var(--background);
  color: var(--text-color);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-fast),
    color var(--transition-fast);
}

.container {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

section {
  padding: 5rem 0;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-primary);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-color);
}

h1 {
  font-size: 3.5rem;
}
h2 {
  font-size: 2.5rem;
}
h3 {
  font-size: 1.75rem;
}
h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: 1rem;
  color: var(--text-muted);
}

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

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

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius-md);
  font-family: var(--font-primary);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 2px solid transparent;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #fff;
}
.btn-primary:hover {
  background-color: var(--color-primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: var(--surface);
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-secondary:hover {
  background-color: var(--color-primary);
  color: #fff;
}

.btn-tertiary {
  background: transparent;
  color: var(--text-color);
}
.btn-tertiary:hover {
  background: rgba(0, 0, 0, 0.05);
}
.dark-theme .btn-tertiary:hover {
  background: rgba(255, 255, 255, 0.05);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.1rem;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}
.section-tag {
  display: inline-block;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary);
  background-color: rgba(0, 123, 255, 0.1);
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
}
.section-title {
  margin-bottom: 1rem;
}
.section-intro {
  font-size: 1.1rem;
  color: var(--text-muted);
}

/* Header */
.main-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 1rem 0;
  background-color: transparent;
  transition: background-color var(--transition-medium),
    padding var(--transition-medium), box-shadow var(--transition-medium);
}
.main-header.scrolled {
  background-color: var(--surface);
  box-shadow: var(--shadow-md);
  padding: 0.75rem 0;
}
.main-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-color);
  font-family: var(--font-primary);
}
.main-header.scrolled .logo {
  color: var(--text-color);
}
.hero .main-header:not(.scrolled) .logo {
  color: #fff;
}

.logo strong {
  color: var(--color-primary);
}
.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}
.nav-links a {
  color: var(--text-color);
  font-weight: 500;
  position: relative;
  padding-bottom: 0.5rem;
}
.hero .main-header:not(.scrolled) .nav-links a {
  color: #fff;
}
.hero .main-header:not(.scrolled) .nav-links a::after {
  background-color: #fff;
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-primary);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-fast);
}
.nav-links a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-color);
  cursor: pointer;
}
.hero .main-header:not(.scrolled) .mobile-nav-toggle {
  color: #fff;
}

/* Hero Section */
.hero-section {
  position: relative;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #fff;
  padding: 0;
  overflow: hidden;
}
.hero-background-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  transform: scale(1.1);
  animation: zoomOut 20s infinite alternate;
}
@keyframes zoomOut {
  from {
    transform: scale(1);
  }
  to {
    transform: scale(1.1);
  }
}
.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(17, 24, 39, 0.7);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
}
.hero-title {
  font-size: 4.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: #fff;
}
.hero-subtitle {
  font-size: 1.25rem;
  margin-bottom: 2.5rem;
  color: rgba(255, 255, 255, 0.9);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}
.hero-cta-group {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1.5rem;
}
.hero-cta-group .btn-tertiary {
  color: #fff;
}

/* Platform Description Section */
.platform-features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}
.feature-card {
  background-color: var(--surface);
  padding: 2.5rem 2rem;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  text-align: center;
  transition: transform var(--transition-fast),
    box-shadow var(--transition-fast);
}
.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}
.feature-icon-wrapper {
  width: 70px;
  height: 70px;
  margin: 0 auto 1.5rem;
  background-image: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-primary-light)
  );
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.75rem;
  color: #fff;
}
.feature-title {
  margin-bottom: 1rem;
}

/* Benefits Section */
.section-benefits {
  background-color: var(--surface);
}
.benefits-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 4rem;
}
.benefits-image-column img {
  max-width: 100%;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
}
.benefits-content-column .section-header {
  text-align: left;
  margin-left: 0;
  margin-right: 0;
}
.benefits-list {
  list-style: none;
  margin-top: 2rem;
}
.benefit-item {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 2rem;
}
.benefit-item i {
  font-size: 1.5rem;
  color: var(--color-secondary);
  margin-top: 5px;
}
.benefit-item h4 {
  margin-bottom: 0.5rem;
}

/* Stories Section */
.stories-carousel {
  display: flex;
  gap: 2rem;
  overflow: hidden;
  position: relative;
  align-items: center;
  min-height: 350px;
}
.story-card {
  background-color: var(--surface);
  border-radius: var(--border-radius-lg);
  padding: 2.5rem;
  border: 1px solid var(--border-color);
  flex: 0 0 80%;
  margin: 0 10%;
  opacity: 0.5;
  transform: scale(0.9);
  transition: opacity var(--transition-medium),
    transform var(--transition-medium);
}
.story-card.active {
  opacity: 1;
  transform: scale(1);
  box-shadow: var(--shadow-lg);
  z-index: 10;
}
.story-quote {
  font-size: 1.2rem;
  font-style: italic;
  color: var(--text-color);
  margin-bottom: 2rem;
  position: relative;
  padding-left: 3rem;
}
.story-quote::before {
  content: "\f10d";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  position: absolute;
  left: 0;
  top: 0;
  font-size: 2rem;
  color: var(--color-primary);
  opacity: 0.5;
}
.story-author {
  display: flex;
  align-items: center;
  gap: 1rem;
  border-top: 1px solid var(--border-color);
  padding-top: 1.5rem;
}
.story-author-icon {
  font-size: 2rem;
  color: var(--text-muted);
}
.author-name {
  display: block;
  font-weight: 600;
  color: var(--text-color);
}
.author-goal {
  font-size: 0.9rem;
  color: var(--text-muted);
}
.carousel-navigation {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
}
.carousel-navigation button {
  background-color: var(--surface);
  border: 1px solid var(--border-color);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition-fast);
}
.carousel-navigation button:hover {
  background-color: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* Mission & Vision */
.section-mission-vision {
  background-color: var(--color-background-dark);
  color: var(--color-text-dark);
}
.mission-vision-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}
.mission-content h3,
.vision-content h3 {
  color: #fff;
  position: relative;
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
}
.mission-content h3::after,
.vision-content h3::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 50px;
  height: 3px;
  background-color: var(--color-primary);
}
.mission-content p,
.vision-content p {
  color: var(--color-text-muted-dark);
  font-size: 1.1rem;
}

/* Team & Reviews */
.team-grid,
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}
.team-member-card,
.review-card {
  background-color: var(--surface);
  padding: 2rem;
  text-align: center;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
}
.team-member-icon,
.review-icon {
  font-size: 3rem;
  color: var(--color-primary);
  margin-bottom: 1rem;
}
.team-member-name {
  margin-bottom: 0.25rem;
}
.team-member-role {
  font-size: 0.9rem;
  color: var(--text-muted);
}
.review-text {
  font-style: italic;
  color: var(--text-color);
  margin-bottom: 1.5rem;
}
.review-author {
  font-weight: 600;
  color: var(--text-muted);
}

/* FAQ Section */
.faq-accordion {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background-color: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  margin-bottom: 1rem;
  overflow: hidden;
}
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}
.faq-question::-webkit-details-marker {
  display: none;
}
.faq-question i {
  transition: transform var(--transition-fast);
}
.faq-item[open] .faq-question i {
  transform: rotate(45deg);
}
.faq-answer {
  padding: 0 1.5rem 1.5rem;
  border-top: 1px solid var(--border-color);
}
.faq-more-link {
  text-align: center;
  margin-top: 2rem;
}

/* CTA */
.section-cta {
  background-color: var(--color-primary);
  background-image: linear-gradient(
    45deg,
    var(--color-primary),
    var(--color-primary-dark)
  );
  color: #fff;
  text-align: center;
}
.cta-title {
  font-size: 2.8rem;
  color: #fff;
  margin-bottom: 1rem;
}
.cta-text {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto 2rem;
}
.btn-cta-main {
  background-color: #fff;
  color: var(--color-primary);
}
.btn-cta-main:hover {
  background-color: var(--color-background-light);
  color: var(--color-primary-dark);
}

/* Footer */
.main-footer {
  background-color: var(--color-surface-dark);
  color: var(--color-text-muted-dark);
  padding: 4rem 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}
.footer-logo {
  color: #fff;
  margin-bottom: 1rem;
  display: inline-block;
}
.footer-description {
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}
.social-links {
  display: flex;
  gap: 1rem;
}
.social-links a {
  color: var(--color-text-muted-dark);
  font-size: 1.2rem;
}
.social-links a:hover {
  color: #fff;
}
.footer-heading {
  color: #fff;
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
}
.footer-links ul {
  list-style: none;
}
.footer-links li {
  margin-bottom: 0.75rem;
}
.footer-links a {
  color: var(--color-text-muted-dark);
}
.footer-links a:hover {
  color: #fff;
  text-decoration: underline;
}
.footer-bottom {
  border-top: 1px solid var(--color-border-dark);
  padding: 1.5rem 0;
  text-align: center;
  font-size: 0.9rem;
}

/* Utilities & Animations */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Notification */
.notification-hidden {
  display: none;
}
#registration-success-notification {
  position: fixed;
  top: 2rem;
  right: 2rem;
  z-index: 2000;
  background-color: var(--color-secondary);
  color: #fff;
  padding: 1.5rem;
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
  animation: slideInRight 0.5s ease-out;
}
.notification-content {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.notification-content i {
  font-size: 1.5rem;
}
.notification-content h3 {
  margin: 0;
  color: #fff;
}
.notification-content p {
  margin: 0;
  color: rgba(255, 255, 255, 0.9);
}
.notification-content button {
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  margin-left: 2rem;
}
@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Responsive Styles */
@media (max-width: 1024px) {
  h1 {
    font-size: 2.8rem;
  }
  h2 {
    font-size: 2rem;
  }
  .hero-title {
    font-size: 3.5rem;
  }

  .nav-links {
    gap: 1.5rem;
  }

  .benefits-container {
    grid-template-columns: 1fr;
  }
  .benefits-image-column {
    order: -1;
    text-align: center;
  }
  .benefits-content-column .section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
  }

  .mission-vision-container {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 15px;
  }
  h1 {
    font-size: 2.2rem;
  }
  .hero-title {
    font-size: 2.8rem;
  }
  .hero-subtitle {
    font-size: 1.1rem;
  }

  .main-navigation {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--surface);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transform: translateX(100%);
    transition: transform var(--transition-medium);
    display: flex;
  }
  .main-navigation.active {
    transform: translateX(0);
  }
  .nav-links {
    flex-direction: column;
    gap: 2.5rem;
    text-align: center;
  }
  .nav-links a {
    font-size: 1.5rem;
    color: var(--text-color);
  }
  .nav-links a:hover::after {
    transform: scaleX(0);
  }
  .hero .main-header:not(.scrolled) .nav-links a {
    color: var(--text-color);
  }

  .mobile-nav-toggle {
    display: block;
    z-index: 1001;
  }
  .mobile-nav-toggle .fa-times {
    display: none;
  }
  .nav-open .fa-bars {
    display: none;
  }
  .nav-open .fa-times {
    display: block;
  }

  .header-actions .btn-login {
    display: none;
  }

  .hero-cta-group {
    flex-direction: column;
  }

  .story-card {
    flex-basis: 100%;
    margin: 0;
  }
  .stories-carousel {
    min-height: 400px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-column {
    text-align: center;
  }
  .social-links {
    justify-content: center;
  }
}

@media (min-width: 1440px) {
  html {
    font-size: 17px;
  }
  .container {
    padding-left: 0;
    padding-right: 0;
  }
}