/* Alphvidia theme tokens */
:root,
[data-theme="alphvidia"] {
  --av-bg: #070b14;
  --av-bg-elevated: #0f1629;
  --av-surface: rgba(255, 255, 255, 0.04);
  --av-surface-solid: #141c2e;
  --av-border: rgba(255, 255, 255, 0.09);
  --av-text: #f0f4fc;
  --av-text-muted: #8b95ad;
  --av-accent: #5b8cff;
  --av-accent-hover: #4a7aef;
  --av-accent-secondary: #22d3ee;
  --av-accent-tertiary: #a78bfa;
  --av-success: #34d399;
  --av-gradient: linear-gradient(135deg, #5b8cff 0%, #22d3ee 50%, #a78bfa 100%);
  --av-radius: 14px;
  --av-radius-sm: 8px;
  --av-radius-lg: 20px;
  --av-font: "Segoe UI", system-ui, -apple-system, sans-serif;
  --av-max-width: min(1200px, 100% - 2rem);
  --av-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --av-glow: 0 0 80px rgba(91, 140, 255, 0.15);
  --av-shadow-lg: 0 24px 48px rgba(0, 0, 0, 0.45);
  --av-transition: 0.25s var(--av-ease);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--av-font);
  background: var(--av-bg);
  color: var(--av-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 1000;
  padding: 0.75rem 1rem;
  background: var(--av-accent);
  color: #fff;
  border-radius: var(--av-radius-sm);
  text-decoration: none;
  font-weight: 600;
}

.skip-link:focus {
  top: 1rem;
}

.container {
  width: var(--av-max-width);
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 11, 20, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--av-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.875rem 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  color: inherit;
}

.logo-img {
  display: block;
  flex-shrink: 0;
}

.logo-text {
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: 0.02em;
}

.nav-list {
  display: flex;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  background: none;
  border: none;
  color: var(--av-text-muted);
  font: inherit;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  border-radius: var(--av-radius-sm);
  transition: color var(--av-transition), background var(--av-transition);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--av-text);
  background: rgba(255, 255, 255, 0.06);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font: inherit;
  font-weight: 500;
  border-radius: var(--av-radius-sm);
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform var(--av-transition), background var(--av-transition),
    border-color var(--av-transition), color var(--av-transition);
}

.btn:focus-visible {
  outline: 2px solid var(--av-accent-secondary);
  outline-offset: 2px;
}

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

.btn-primary {
  background: var(--av-accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--av-accent-hover);
}

.btn-secondary {
  background: transparent;
  color: var(--av-text);
  border-color: var(--av-border);
}

.btn-secondary:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.04);
}

.btn-outline {
  background: transparent;
  color: var(--av-accent);
  border-color: var(--av-accent);
}

.btn-outline:hover {
  background: rgba(91, 140, 255, 0.12);
}

.btn-ghost {
  background: transparent;
  color: var(--av-accent-secondary);
  border: none;
  padding: 0.25rem 0;
}

.btn-ghost:hover {
  color: var(--av-text);
}

.btn-lg {
  padding: 0.875rem 1.5rem;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
}

/* Typography helpers */
.eyebrow {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--av-accent-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 3rem;
}

.section-header h2 {
  font-size: clamp(1.75rem, 3vw, 2.375rem);
  margin: 0.5rem 0 1rem;
  line-height: 1.2;
}

.section-lead {
  color: var(--av-text-muted);
  margin: 0;
}

.section-cta {
  text-align: center;
  margin-top: 2rem;
}

/* Hero */
.hero {
  padding: 4rem 0 5rem;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(91, 140, 255, 0.18), transparent),
    radial-gradient(ellipse 60% 40% at 80% 60%, rgba(34, 211, 238, 0.08), transparent),
    var(--av-bg);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
}

.hero-copy h1 {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  margin: 0.5rem 0 1rem;
  background: var(--av-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  color: var(--av-text-muted);
  font-size: 1.125rem;
  max-width: 34rem;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.875rem;
  color: var(--av-text-muted);
}

.badge-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 0.5rem;
  border-radius: 50%;
  background: var(--av-success);
  vertical-align: middle;
}

/* Hero card */
.hero-card {
  background: var(--av-surface-solid);
  border: 1px solid var(--av-border);
  border-radius: var(--av-radius-lg);
  box-shadow: var(--av-glow), var(--av-shadow-lg);
  overflow: hidden;
}

.hero-card__bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1.25rem;
  background: rgba(0, 0, 0, 0.25);
  border-bottom: 1px solid var(--av-border);
  font-size: 0.8125rem;
}

.hero-card__domain {
  color: var(--av-text-muted);
}

.hero-card__status {
  color: var(--av-success);
  font-weight: 600;
}

.hero-card__status::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 0.4rem;
  border-radius: 50%;
  background: var(--av-success);
  animation: pulse 2s ease infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-card__body {
  padding: 1.5rem;
}

.transcript-line {
  margin: 0 0 0.75rem;
  font-size: 0.9375rem;
}

.transcript-line.muted {
  color: var(--av-text-muted);
}

.ai-suggestion {
  margin-top: 1.25rem;
  padding: 1rem;
  background: rgba(91, 140, 255, 0.1);
  border: 1px solid rgba(91, 140, 255, 0.25);
  border-radius: var(--av-radius-sm);
}

.ai-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--av-accent-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
}

.ai-suggestion p {
  margin: 0;
  font-size: 0.9375rem;
}

/* Platform section */
.platform-section {
  padding: 5rem 0;
  background: var(--av-bg-elevated);
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
}

.platform-card {
  background: var(--av-surface);
  border: 1px solid var(--av-border);
  border-radius: var(--av-radius);
  padding: 1.75rem;
  text-align: center;
  transition: transform var(--av-transition), border-color var(--av-transition),
    box-shadow var(--av-transition);
}

.platform-card:hover {
  transform: translateY(-4px);
  border-color: rgba(91, 140, 255, 0.35);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
}

.platform-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--av-gradient);
  border-radius: var(--av-radius-sm);
  font-weight: 700;
  font-size: 1.25rem;
  color: #fff;
}

.platform-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
}

.platform-status {
  color: var(--av-success);
  font-size: 0.875rem;
  font-weight: 500;
  margin: 0 0 1.25rem;
}

.platform-note {
  text-align: center;
  color: var(--av-text-muted);
  font-size: 0.875rem;
  margin: 2rem 0 0;
}

/* Features */
.features-section {
  padding: 5rem 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.feature-card {
  background: var(--av-surface);
  border: 1px solid var(--av-border);
  border-radius: var(--av-radius);
  padding: 2rem;
  transition: transform var(--av-transition), box-shadow var(--av-transition);
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
}

.feature-card h3 {
  margin: 0 0 0.75rem;
  font-size: 1.25rem;
}

.feature-card p {
  color: var(--av-text-muted);
  margin: 0 0 1rem;
}

/* Testimonials */
.testimonials-section {
  padding: 5rem 0;
  background: var(--av-bg-elevated);
}

.testimonials-track {
  display: flex;
  gap: 1.25rem;
  overflow-x: auto;
  padding-bottom: 1rem;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.testimonial-card {
  flex: 0 0 min(320px, 85vw);
  scroll-snap-align: start;
  background: var(--av-surface);
  border: 1px solid var(--av-border);
  border-radius: var(--av-radius);
  padding: 1.75rem;
}

.testimonial-text {
  margin: 0 0 1.25rem;
  font-style: italic;
  color: var(--av-text-muted);
}

.testimonial-author {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.testimonial-author strong {
  color: var(--av-text);
}

.testimonial-author span {
  font-size: 0.875rem;
  color: var(--av-text-muted);
}

/* Exam mode */
.exam-section {
  padding: 5rem 0;
}

.exam-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.exam-copy h2 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  margin: 0.5rem 0 1rem;
}

.exam-copy p {
  color: var(--av-text-muted);
  margin: 0 0 1.5rem;
}

.exam-list {
  margin: 0 0 2rem;
  padding-left: 1.25rem;
  color: var(--av-text-muted);
}

.exam-list li {
  margin-bottom: 0.5rem;
}

.exam-card {
  background: var(--av-surface-solid);
  border: 1px solid var(--av-border);
  border-radius: var(--av-radius-lg);
  padding: 2rem;
  box-shadow: var(--av-glow);
}

.exam-question {
  font-weight: 600;
  margin: 0 0 1.25rem;
}

.exam-options {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
}

.exam-options li {
  padding: 0.75rem 1rem;
  margin-bottom: 0.5rem;
  border: 1px solid var(--av-border);
  border-radius: var(--av-radius-sm);
  color: var(--av-text-muted);
  transition: background var(--av-transition), border-color var(--av-transition);
}

.exam-correct {
  background: rgba(52, 211, 153, 0.12) !important;
  border-color: var(--av-success) !important;
  color: var(--av-success) !important;
  font-weight: 600;
}

.exam-confidence {
  margin: 0;
  font-size: 0.875rem;
  color: var(--av-text-muted);
}

.exam-confidence strong {
  color: var(--av-success);
}

/* Pricing */
.pricing-section {
  padding: 5rem 0;
  background: var(--av-bg-elevated);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}

.pricing-card {
  position: relative;
  background: var(--av-surface);
  border: 1px solid var(--av-border);
  border-radius: var(--av-radius);
  padding: 2rem;
  transition: transform var(--av-transition), border-color var(--av-transition);
}

.pricing-card:hover {
  transform: translateY(-4px);
}

.pricing-card--popular {
  border-color: var(--av-accent);
  box-shadow: var(--av-glow);
}

.popular-badge {
  position: absolute;
  top: -0.75rem;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.25rem 0.75rem;
  background: var(--av-gradient);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 999px;
  white-space: nowrap;
}

.pricing-card h3 {
  margin: 0 0 0.25rem;
  font-size: 1.375rem;
}

.pricing-tagline {
  color: var(--av-text-muted);
  font-size: 0.875rem;
  margin: 0 0 1.25rem;
}

.pricing-price {
  margin: 0 0 0.5rem;
}

.price-old {
  color: var(--av-text-muted);
  text-decoration: line-through;
  font-size: 1rem;
  margin-right: 0.5rem;
}

.price-new {
  font-size: 2rem;
  font-weight: 700;
  color: var(--av-accent);
}

.pricing-detail {
  font-size: 0.875rem;
  color: var(--av-success);
  margin: 0 0 1.5rem;
}

.pricing-features {
  margin: 0 0 1.5rem;
  padding-left: 1.25rem;
  color: var(--av-text-muted);
  font-size: 0.9375rem;
}

.pricing-features li {
  margin-bottom: 0.4rem;
}

.pricing-guarantee {
  text-align: center;
  color: var(--av-text-muted);
  font-size: 0.875rem;
  margin: 2.5rem 0 0;
}

/* FAQ */
.faq-section {
  padding: 5rem 0;
}

.faq-list {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.faq-item {
  width: 100%;
  text-align: left;
  background: var(--av-surface);
  border: 1px solid var(--av-border);
  border-radius: var(--av-radius-sm);
  padding: 1.25rem 1.5rem;
  color: var(--av-text);
  font: inherit;
  font-weight: 500;
  cursor: pointer;
  transition: border-color var(--av-transition), background var(--av-transition);
}

.faq-item:hover,
.faq-item:focus-visible {
  border-color: rgba(91, 140, 255, 0.4);
  background: rgba(91, 140, 255, 0.06);
}

.faq-item::after {
  content: "+";
  float: right;
  color: var(--av-accent-secondary);
  font-size: 1.25rem;
  font-weight: 400;
}

/* Trust */
.trust-section {
  padding: 4rem 0;
  background:
    radial-gradient(ellipse 70% 60% at 50% 100%, rgba(91, 140, 255, 0.12), transparent),
    var(--av-bg-elevated);
}

.trust-inner {
  text-align: center;
  max-width: 560px;
  margin: 0 auto;
}

.trust-inner h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin: 0 0 1.5rem;
}

.trust-list {
  list-style: none;
  margin: 0 0 2rem;
  padding: 0;
  color: var(--av-text-muted);
}

.trust-list li {
  padding: 0.5rem 0;
}

.trust-list li::before {
  content: "✓ ";
  color: var(--av-success);
  font-weight: 700;
}

/* Steps */
.steps-section {
  padding: 5rem 0;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: none;
}

.step-card {
  background: var(--av-surface);
  border: 1px solid var(--av-border);
  border-radius: var(--av-radius);
  padding: 2rem;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  margin-bottom: 1rem;
  background: var(--av-gradient);
  border-radius: 50%;
  font-weight: 700;
  font-size: 1rem;
  color: #fff;
}

.step-card h3 {
  margin: 0 0 0.75rem;
  font-size: 1.125rem;
}

.step-card p {
  color: var(--av-text-muted);
  margin: 0 0 1rem;
  font-size: 0.9375rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--av-border);
  padding: 2.5rem 0;
  background: var(--av-bg-elevated);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: inherit;
}

.footer-tagline {
  color: var(--av-text-muted);
  font-size: 0.875rem;
  margin: 0.25rem 0 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.footer-links button {
  background: none;
  border: none;
  color: var(--av-text-muted);
  font: inherit;
  font-size: 0.875rem;
  cursor: pointer;
  padding: 0;
  transition: color var(--av-transition);
}

.footer-links button:hover,
.footer-links button:focus-visible {
  color: var(--av-accent-secondary);
}

.footer-contact {
  color: var(--av-text-muted);
  margin: 0;
  font-size: 0.875rem;
}

.footer-contact a {
  color: var(--av-accent-secondary);
  text-decoration: none;
  transition: color var(--av-transition);
}

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

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--av-ease), transform 0.7s var(--av-ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.float-animation {
  animation: float 6s ease-in-out infinite;
}

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

/* Dialog */
.dialog-backdrop {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  animation: fade-in 0.2s ease;
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.dialog-panel {
  background: var(--av-surface-solid);
  border: 1px solid var(--av-border);
  border-radius: var(--av-radius-lg);
  max-width: 520px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  padding: 2rem;
  box-shadow: var(--av-shadow-lg);
  animation: slide-up 0.3s var(--av-ease);
}

@keyframes slide-up {
  from {
    opacity: 0;
    transform: translateY(16px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.dialog-panel h2 {
  margin: 0 0 0.75rem;
  font-size: 1.5rem;
}

.dialog-panel p {
  color: var(--av-text-muted);
  margin: 0 0 1.5rem;
  line-height: 1.7;
}

.dialog-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
}

/* Responsive */
@media (max-width: 900px) {
  .hero-grid,
  .exam-grid {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    text-align: center;
  }

  .hero-subtitle {
    margin-inline: auto;
  }

  .hero-actions,
  .hero-badges {
    justify-content: center;
  }

  .steps-grid {
    grid-template-columns: 1fr;
  }

  .nav {
    display: none;
  }
}

@media (max-width: 600px) {
  .header-inner .btn-primary {
    padding: 0.5rem 0.875rem;
    font-size: 0.875rem;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .float-animation {
    animation: none;
  }
}