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

body {
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: #fefcf9;
  color: #0f172a;
  line-height: 1.7;
  min-height: 100vh;
}

/* === NAVIGATION BAR === */
.navbar {
  position: sticky;
  top: 0;
  background: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  z-index: 1000;
  padding: 0;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo a {
  text-decoration: none;
}

.nav-logo-img {
  height: 48px;
  width: auto;
  display: block;
  mix-blend-mode: multiply;
}

.nav-logo a:hover .nav-logo-img {
  opacity: 0.8;
}

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

.nav-link {
  color: #475569;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s ease;
  position: relative;
}

.nav-link:hover {
  color: #02aeb2;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: #02aeb2;
  transition: width 0.3s ease;
}

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

.nav-login {
  color: #02aeb2;
}

.nav-register {
  background: linear-gradient(135deg, #02aeb2 0%, #059199 100%);
  color: #fff !important;
  padding: 0.5rem 1.25rem;
  border-radius: 0.5rem;
  transition: all 0.2s ease;
}

.nav-register::after {
  display: none;
}

.nav-register:hover {
  background: linear-gradient(135deg, #059199 0%, #0284c7 100%);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(2, 174, 178, 0.3);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 4px;
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background: #02aeb2;
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* === SECTIONS === */
.section {
  padding: 5rem 2rem;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: 3rem;
  font-weight: 600;
  color: #0f172a;
  margin-bottom: 1rem;
  text-align: center;
  letter-spacing: 0.01em;
}

.section-subtitle {
  font-size: 1.1rem;
  color: #64748b;
  text-align: center;
  margin-bottom: 3rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* === ABOUT SECTION === */
.about-section {
  background: #fefcf9;
  padding-top: 2rem;
}

.about-content {
  max-width: 900px;
  margin: 0 auto;
}

.concept-header {
  text-align: center;
  margin-bottom: 3rem;
  padding-top: 2rem;
}

.logo-large {
  font-family: 'Dancing Script', cursive;
  font-size: 3.5rem;
  font-weight: 700;
  color: #02aeb2;
  margin-bottom: 0.5rem;
  letter-spacing: 0.02em;
}

.tagline {
  font-size: 1.1rem;
  color: #64748b;
  font-style: italic;
}

.intro-card {
  background: #fff;
  border-radius: 1.5rem;
  padding: 2.5rem;
  margin-bottom: 3rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.main-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: 2.8rem;
  font-weight: 600;
  color: #0f172a;
  margin-bottom: 1.5rem;
  text-align: center;
  letter-spacing: 0.01em;
}

.concept-text {
  font-size: 1.1rem;
  color: #475569;
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

.concept-text.mission {
  font-size: 1.2rem;
  color: #0f172a;
  font-weight: 500;
  text-align: center;
  margin: 2rem 0;
}

.concept-text.highlight {
  text-align: center;
  color: #02aeb2;
  font-weight: 600;
  font-size: 1.3rem;
  margin-top: 2rem;
}

.about-text {
  font-size: 1.1rem;
  color: #475569;
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

.about-text.mission {
  font-size: 1.2rem;
  color: #0f172a;
  font-weight: 500;
  text-align: center;
  margin: 2rem 0;
}

.about-text.highlight {
  text-align: center;
  color: #02aeb2;
  font-weight: 600;
  font-size: 1.3rem;
  margin-top: 2rem;
}

.equation-box {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  margin: 3rem 0;
  flex-wrap: wrap;
}

.symbol-item {
  flex: 1;
  min-width: 250px;
  text-align: center;
}

.symbol {
  font-size: 4rem;
  font-weight: 700;
  color: #02aeb2;
  display: block;
  margin-bottom: 1rem;
}

.symbol-desc {
  color: #475569;
  font-size: 1rem;
  line-height: 1.6;
}

.arrow {
  font-size: 2rem;
  color: #02aeb2;
  font-weight: 700;
}

/* === HOW IT WORKS === */
.howit-card {
  background: #fff;
  border-radius: 1.5rem;
  padding: 2.5rem;
  margin-bottom: 3rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  border-top: 4px solid #02aeb2;
}

.howit-card > .section-title {
  margin-bottom: 1.5rem;
}

.flow-diagram {
  display: flex;
  align-items: stretch;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 2.5rem 0;
}

.flow-step {
  flex: 1 1 180px;
  max-width: 220px;
  background: linear-gradient(180deg, #f0fdfe 0%, #fefcf9 100%);
  border: 1px solid #e2e8f0;
  border-radius: 1rem;
  padding: 1.5rem 1rem;
  text-align: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.flow-step:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(2, 174, 178, 0.15);
}

.flow-step-loop {
  background: linear-gradient(180deg, #02aeb2 0%, #059199 100%);
  border-color: #02aeb2;
  color: #fff;
}

.flow-step-loop .flow-title,
.flow-step-loop .flow-text {
  color: #fff;
}

.flow-step-loop .flow-icon {
  background: #fff;
  color: #02aeb2;
}

.flow-icon {
  width: 3rem;
  height: 3rem;
  margin: 0 auto 0.75rem auto;
  background: linear-gradient(135deg, #02aeb2 0%, #059199 100%);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.25rem;
  box-shadow: 0 4px 12px rgba(2, 174, 178, 0.3);
}

.flow-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.25rem;
  font-weight: 600;
  color: #0f172a;
  margin-bottom: 0.5rem;
}

.flow-text {
  font-size: 0.9rem;
  color: #475569;
  line-height: 1.6;
}

.flow-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  color: #02aeb2;
  font-weight: 700;
  flex: 0 0 auto;
}

.flow-arrow-loop {
  font-size: 2rem;
}

.origin-card {
  background: #fff;
  border-radius: 1.5rem;
  padding: 2.5rem;
  margin-bottom: 3rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  border-left: 4px solid #02aeb2;
}

.origin-card .section-title {
  font-family: 'Dancing Script', cursive;
  font-size: 2.5rem;
  color: #02aeb2;
}

.origin-text {
  font-size: 1rem;
  color: #475569;
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

.origin-text em {
  font-style: italic;
  color: #0f172a;
}

.origin-text.highlight {
  text-align: center;
  color: #02aeb2;
  font-weight: 600;
  font-size: 1.2rem;
  margin-top: 2rem;
}

.roles-section {
  margin-top: 3rem;
  padding-top: 3rem;
  border-top: 2px solid #e2e8f0;
}

.role-card {
  background: #fff;
  border-radius: 1.5rem;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  border-left: 4px solid #02aeb2;
  position: relative;
}

.role-number {
  position: absolute;
  top: -1rem;
  left: 2rem;
  width: 3rem;
  height: 3rem;
  background: linear-gradient(135deg, #02aeb2 0%, #059199 100%);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.25rem;
  box-shadow: 0 4px 12px rgba(2, 174, 178, 0.3);
}

.role-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.9rem;
  font-weight: 600;
  color: #0f172a;
  margin-bottom: 1rem;
  margin-top: 1rem;
  letter-spacing: 0.01em;
}

.role-name {
  color: #02aeb2;
  font-weight: 700;
}

.role-text {
  font-size: 1rem;
  color: #475569;
  line-height: 1.8;
}

/* === PARTNERS SECTION === */
.partners-section {
  background: #fff;
}

.partners-content {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

/* === WAITLIST SECTION === */
.waitlist-section {
  background: linear-gradient(135deg, #f0fdfe 0%, #fefcf9 100%);
}

.waitlist-badge {
  display: inline-block;
  background: linear-gradient(135deg, #02aeb2, #059199);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.35rem 1rem;
  border-radius: 999px;
  margin: 0 auto 1.25rem auto;
  display: block;
  width: fit-content;
}

.waitlist-roles {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.waitlist-role-btn {
  padding: 0.65rem 1.5rem;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  background: #fff;
  color: #475569;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.waitlist-role-btn:hover {
  border-color: #02aeb2;
  color: #02aeb2;
  transform: translateY(-2px);
}

.waitlist-role-btn.active {
  border-color: #02aeb2;
  background: linear-gradient(135deg, #02aeb2, #059199);
  color: #fff;
  box-shadow: 0 4px 14px rgba(2, 174, 178, 0.3);
}

.waitlist-form-wrapper {
  max-width: 560px;
  margin: 0 auto;
  background: #fff;
  border-radius: 16px;
  padding: 2.5rem;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
}

.waitlist-fields {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 1.75rem;
}

.waitlist-submit-btn {
  width: 100%;
  padding: 0.9rem;
  font-size: 1rem;
  font-weight: 700;
}

/* === CONTACT SECTION === */
.contact-section {
  background: #fff;
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 4rem;
  margin-top: 2rem;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.contact-item h3 {
  color: #02aeb2;
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.contact-item p {
  color: #475569;
  line-height: 1.7;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

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

.form-group label {
  color: #0f172a;
  font-weight: 600;
  font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
  padding: 0.875rem;
  border: 2px solid #e2e8f0;
  border-radius: 0.5rem;
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.2s ease;
  background: #fff;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #02aeb2;
  box-shadow: 0 0 0 3px rgba(2, 174, 178, 0.1);
}

.contact-form .btn-primary {
  background: #02aeb2;
  color: #fff;
  border: none;
  padding: 0.875rem 2rem;
  border-radius: 0.75rem;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(2, 174, 178, 0.25);
  width: 100%;
  max-width: 300px;
  display: block;
  margin: 0 auto;
}

.contact-form .btn-primary:hover {
  background: #059199;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(2, 174, 178, 0.35);
}

.contact-form .btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(2, 174, 178, 0.3);
}

.contact-status {
  padding: 0.75rem;
  border-radius: 0.5rem;
  text-align: center;
  font-weight: 500;
  display: none;
}

.contact-status.success {
  background: #f0fdf4;
  color: #166534;
  border: 1px solid #86efac;
  display: block;
}

.contact-status.error {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fca5a5;
  display: block;
}

/* === FOOTER === */
.footer {
  background: #0f172a;
  color: #cbd5e1;
  padding: 3rem 2rem 1.5rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h3 {
  font-family: 'Dancing Script', cursive;
  font-size: 1.75rem;
  font-weight: 700;
  color: #02aeb2;
  margin-bottom: 1rem;
}

.footer-section h4 {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #02aeb2;
  margin-bottom: 1rem;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 0.5rem;
}

.footer-section a {
  color: #cbd5e1;
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-section a:hover {
  color: #02aeb2;
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 2rem;
  border-top: 1px solid #334155;
  text-align: center;
  color: #94a3b8;
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background: #fff;
    width: 100%;
    text-align: center;
    transition: 0.3s;
    box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
    padding: 2rem 0;
    gap: 0;
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-menu li {
    margin: 1rem 0;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
  }

  .section-title {
    font-size: 2rem;
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .equation-box {
    flex-direction: column;
  }

  .arrow {
    transform: rotate(90deg);
  }

  .logo-large {
    font-size: 2rem;
  }

  .main-title {
    font-size: 2rem;
  }

  .intro-card,
  .howit-card,
  .origin-card {
    padding: 1.5rem;
  }

  .flow-diagram {
    flex-direction: column;
    align-items: stretch;
  }

  .flow-step {
    max-width: 100%;
  }

  .flow-arrow {
    transform: rotate(90deg);
    margin: 0.25rem 0;
  }
}