:root {
  --bg: #000000;
  --fg: #ffffff;
  --border: #353538;
  --teal: #41d3f5;
  --lime: #42ff5f;
  --gray-brand: #353538;
  --purple-brand: #6617f2;
}

[data-theme="light"] {
  --bg: #ffffff;
  --fg: #000000;
  --border: #e5e5e5;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--bg);
  color: var(--fg);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
}

button {
  font: inherit;
}

.page {
  background-color: var(--bg);
  color: var(--fg);
}

.container {
  max-width: 80rem;
  margin: 0 auto;
}

.section {
  padding: 56px 24px;
}

.section-border {
  border-top: 1px solid var(--border);
}

@media (min-width: 768px) {
  .section {
    padding: 80px 48px;
  }
}

/* Nav */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  padding: 16px 24px;
  border-bottom: 1px solid transparent;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.nav.scrolled {
  background-color: var(--bg);
  border-bottom-color: var(--border);
}

@media (min-width: 768px) {
  .nav {
    padding: 16px 48px;
  }
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  max-width: 80rem;
  margin: 0 auto;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: 999px;
  border: none;
  background: transparent;
  color: var(--fg);
  opacity: 0.6;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.2s ease;
  cursor: pointer;
}

.theme-toggle:hover {
  opacity: 0.9;
}

[data-theme="dark"] .icon-sun { display: block; }
[data-theme="dark"] .icon-moon { display: none; }
[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: block; }

.btn-primary {
  display: inline-block;
  background-color: var(--lime);
  color: #000000;
  padding: 14px 32px;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: opacity 0.2s ease, transform 0.15s ease;
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-nav {
  padding: 10px 20px;
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-login {
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  white-space: nowrap;
  flex-shrink: 0;
  color: #ffffff;
  transition: opacity 0.2s ease;
}

.nav-login:hover {
  opacity: 0.8;
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  padding: 112px 24px 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

@media (min-width: 768px) {
  .hero {
    padding: 112px 48px 40px;
  }
}

.hero-glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse 60% 50% at 50% 40%, rgba(65, 211, 245, 0.08) 0%, transparent 70%);
}

.hero-mark {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translate(33%, -50%);
  opacity: 0.1;
  pointer-events: none;
  user-select: none;
  display: none;
  width: 560px;
  height: 560px;
}

@media (min-width: 1024px) {
  .hero-mark {
    display: block;
  }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 64rem;
  margin: 0 auto;
}

.hero-title {
  margin: 0 0 28px;
  font-size: 3rem;
  line-height: 1.15;
  font-weight: 300;
  letter-spacing: -0.02em;
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 4.5rem;
    line-height: 1.05;
  }
}

.hero-subtitle {
  margin: 0 0 40px;
  font-size: 1.25rem;
  line-height: 1.7;
  max-width: 42rem;
  margin-left: auto;
  margin-right: auto;
}

@media (min-width: 768px) {
  .hero-subtitle {
    font-size: 1.5rem;
  }
}

.scroll-indicator {
  margin-top: 32px;
  display: flex;
  justify-content: center;
}

.scroll-indicator::after {
  content: "";
  width: 1px;
  height: 32px;
  border-radius: 999px;
  background: linear-gradient(to bottom, rgba(65, 211, 245, 0.5), transparent);
}

.gradient-text {
  background: linear-gradient(90deg, #41d3f5, #42ff5f);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Feature sections */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}

@media (min-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .feature-grid.reverse > :first-child {
    order: 2;
  }
}

.feature-text {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.eyebrow {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--teal);
  font-weight: 300;
}

.feature-title {
  margin: 0;
  font-size: 2rem;
  line-height: 1.2;
  font-weight: 300;
  letter-spacing: -0.02em;
}

@media (min-width: 768px) {
  .feature-title {
    font-size: 3rem;
  }
}

.feature-body {
  margin: 0;
  font-size: 1.125rem;
  line-height: 1.7;
}

@media (min-width: 768px) {
  .feature-body {
    font-size: 1.25rem;
  }
}

.benefits {
  list-style: none;
  padding: 0;
  margin: 4px 0 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.check-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 1rem;
  line-height: 1.7;
}

@media (min-width: 768px) {
  .check-item {
    font-size: 1.125rem;
  }
}

.check-icon,
.dot-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.check-icon {
  width: 20px;
  height: 20px;
  margin-top: 4px;
  border-radius: 999px;
  background: rgba(65, 211, 245, 0.12);
  border: 1px solid rgba(65, 211, 245, 0.25);
}

.dot-icon {
  width: 16px;
  height: 16px;
  margin-top: 6px;
  border-radius: 999px;
  background: rgba(65, 211, 245, 0.15);
}

.feature-graphic {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(65, 211, 245, 0.02);
  border: 1px solid rgba(65, 211, 245, 0.12);
  box-shadow: 0 0 40px rgba(65, 211, 245, 0.06), 0 0 80px rgba(65, 211, 245, 0.03);
}

.feature-graphic--full {
  background: transparent;
  border: none;
  box-shadow: none;
  aspect-ratio: auto;
}

.card-network-logos {
  display: flex;
  align-items: center;
  gap: 16px 32px;
  padding-top: 24px;
  flex-wrap: wrap;
}

.card-network-top {
  display: flex;
  align-items: center;
  gap: 16px 32px;
}

.card-network-discover {
  display: flex;
  align-items: center;
}

@media (max-width: 767px) {
  .card-network-logos {
    flex-direction: column;
    align-items: center; /* center both rows as a group */
  }
  .card-network-top {
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center; /* center the Visa/MC/Amex row */
    width: 100%;
  }
  .card-network-discover {
    width: 100%;
    justify-content: center;
  }
}

/* Data insight cards */
.data-cards {
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(65, 211, 245, 0.14);
  background: rgba(65, 211, 245, 0.02);
  box-shadow: 0 0 60px rgba(65, 211, 245, 0.08), 0 0 120px rgba(65, 211, 245, 0.04);
}

.data-grid {
  display: grid;
  grid-template-columns: 1fr;
}

.data-card {
  display: flex;
  gap: 16px;
  padding: 24px;
}

.data-card:not(:last-child) {
  border-bottom: 1px solid rgba(65, 211, 245, 0.1);
}

@media (min-width: 768px) {
  .data-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .data-card {
    padding: 32px;
  }

  .data-card:not(:last-child) {
    border-bottom: none;
    border-right: 1px solid rgba(65, 211, 245, 0.1);
  }

  .data-card:nth-child(3) {
    border-right: none;
  }
}

.data-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
  background: rgba(65, 211, 245, 0.1);
  border: 1px solid rgba(65, 211, 245, 0.2);
  box-shadow: 0 0 20px rgba(65, 211, 245, 0.15), 0 0 40px rgba(65, 211, 245, 0.06);
}

.data-title {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 400;
}

.data-body {
  margin: 0;
  font-size: 1rem;
  line-height: 1.6;
  opacity: 0.7;
}

/* Logo carousel */
.logo-carousel {
  padding: 56px 24px;
}

@media (min-width: 768px) {
  .logo-carousel {
    padding: 80px 48px;
  }
}

.logo-heading {
  text-align: center;
}

.logo-title {
  margin: 0;
  font-size: 2rem;
  line-height: 1.2;
  font-weight: 300;
  letter-spacing: -0.02em;
  max-width: 48rem;
  margin-left: auto;
  margin-right: auto;
}

@media (min-width: 768px) {
  .logo-title {
    font-size: 3rem;
  }
}

.marquee {
  margin-top: 40px;
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent 0%, black 10%, black 90%, transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, black 10%, black 90%, transparent 100%);
}

.marquee-track {
  display: flex;
  align-items: center;
  gap: 72px;
  width: max-content;
  animation: rivet-marquee 30s linear infinite;
}

.marquee-logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px 0;
}

@keyframes rivet-marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* Closing CTA */
.closing-cta {
  position: relative;
  overflow: hidden;
}

.closing-glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse 70% 60% at 50% 50%, rgba(65, 211, 245, 0.05) 0%, transparent 70%);
}

.closing-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 52rem;
  margin: 0 auto;
}

.closing-title {
  margin: 0 0 24px;
  font-size: 2.25rem;
  line-height: 1.15;
  font-weight: 300;
  letter-spacing: -0.02em;
}

@media (min-width: 768px) {
  .closing-title {
    font-size: 3.75rem;
  }
}

.closing-body {
  margin: 0 auto 40px;
  max-width: 32rem;
  font-size: 1.125rem;
  line-height: 1.7;
}

@media (min-width: 768px) {
  .closing-body {
    font-size: 1.25rem;
  }
}

/* Footer */
.footer {
  padding: 40px 24px;
}

@media (min-width: 768px) {
  .footer {
    padding: 40px 48px;
  }
}

.footer-inner {
  max-width: 80rem;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  text-align: center;
}

@media (min-width: 768px) {
  .footer-inner {
    flex-direction: row;
    text-align: right;
  }
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 16px;
}

.footer-links a {
  font-size: 0.75rem;
  color: #ffffff;
  transition: opacity 0.2s ease;
}

.footer-links a:hover {
  opacity: 0.7;
}

.footer-meta {
  font-size: 0.75rem;
  color: #ffffff;
}

.footer-location {
  font-size: 0.75rem;
  color: #ffffff;
}

/* Legal pages */
.legal-section {
  padding-top: 112px;
}

@media (min-width: 768px) {
  .legal-section {
    padding-top: 128px;
  }
}

.legal-content {
  max-width: 48rem;
}

.legal-content h1 {
  margin: 0 0 8px;
  font-size: 2.5rem;
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.legal-meta {
  margin: 0 0 48px;
  font-size: 0.875rem;
  opacity: 0.45;
}

.legal-content h2 {
  margin: 40px 0 12px;
  font-size: 1.125rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--teal);
}

.legal-content p {
  margin: 0 0 16px;
  font-size: 1rem;
  line-height: 1.75;
  opacity: 0.8;
}

.legal-content ul {
  margin: 0 0 16px;
  padding-left: 20px;
}

.legal-content li {
  font-size: 1rem;
  line-height: 1.75;
  opacity: 0.8;
  margin-bottom: 6px;
}

.legal-content a {
  color: var(--teal);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.legal-contact {
  margin-top: 40px;
  padding: 24px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(65, 211, 245, 0.02);
}

.legal-contact p {
  margin: 0;
  line-height: 1.8;
}

/* Demo page */
.demo-section {
  min-height: 100vh;
  padding: 128px 24px 96px;
  display: flex;
  align-items: center;
  justify-content: center;
}

@media (min-width: 768px) {
  .demo-section {
    padding: 128px 48px 96px;
  }
}

.demo-container {
  width: 100%;
  max-width: 32rem;
}

.demo-eyebrow {
  text-align: center;
  margin: 0 0 20px;
  font-size: 0.75rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--teal);
  font-weight: 500;
}

.demo-title {
  text-align: center;
  margin: 0 0 12px;
  font-size: 2rem;
  line-height: 1.2;
  font-weight: 300;
  letter-spacing: -0.02em;
}

@media (min-width: 768px) {
  .demo-title {
    font-size: 3rem;
  }
}

.demo-subtitle {
  text-align: center;
  margin: 0 0 40px;
  font-size: 1rem;
}

.demo-card {
  border-radius: 20px;
  padding: 32px;
  border: 1px solid var(--border);
  background-color: rgba(255, 255, 255, 0.02);
}

@media (min-width: 768px) {
  .demo-card {
    padding: 40px;
  }
}

.form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 640px) {
  .form-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-field label {
  font-size: 0.875rem;
  opacity: 0.65;
  font-weight: 400;
}

.form-field label span {
  color: var(--teal);
  margin-left: 3px;
}

.form-field input {
  width: 100%;
  padding: 12px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background-color: rgba(255, 255, 255, 0.04);
  color: var(--fg);
  font-size: 0.875rem;
  font-weight: 300;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-field input:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 2px rgba(65, 211, 245, 0.15);
}

.form-submit {
  width: 100%;
  padding: 16px;
  border-radius: 8px;
  border: none;
  background-color: var(--lime);
  color: #000000;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: opacity 0.2s ease, transform 0.15s ease;
}

.form-submit:hover {
  opacity: 0.9;
}

.form-submit:active {
  transform: scale(0.98);
}

.form-note {
  text-align: center;
  font-size: 0.75rem;
  opacity: 0.35;
  margin-top: 4px;
}

.form-error {
  text-align: center;
  font-size: 0.85rem;
  color: #ff4d4d;
  margin-top: 12px;
}

.form-success {
  text-align: center;
  padding: 48px 0;
}

.success-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: 999px;
  margin-bottom: 24px;
  background-color: rgba(66, 255, 95, 0.12);
  border: 1px solid var(--lime);
}

.success-title {
  margin: 0 0 12px;
  font-size: 1.5rem;
  font-weight: 300;
}

.success-body {
  margin: 0;
  opacity: 0.55;
}

.hidden {
  display: none;
}

.check-line {
  stroke-dasharray: 20;
  stroke-dashoffset: 0;
  opacity: 1;
}

/* Pulsing dot */
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.7); }
}

.animate-pulse-dot {
  animation: pulse-dot 1.8s ease-in-out infinite;
}

/* Theme-aware logo display */
.logo-for-dark {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.logo-for-light {
  display: none;
}

[data-theme="light"] .logo-for-dark {
  display: none;
}

[data-theme="light"] .logo-for-light {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}