:root {
  --cream: #fcf7e9;
  --white: #ffffff;
  --black: #000000;
  --blue: #0e638e;
  --red: #d42a20;
  --red-dark: #b51f18;
  --yellow: #fac22b;
  --text-muted: #4a4a4a;
  --card-shadow: 0 8px 24px rgba(14, 99, 142, 0.08);
  --radius: 16px;
  --demo-highlight-opacity: 0.45;
  font-size: 16px;
}

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

body {
  margin: 0;
  font-family: "Inter", "Atkinson Hyperlegible", -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  color: var(--black);
  background-color: var(--cream);
  line-height: 1.6;
}

img {
  max-width: 100%;
  display: block;
}

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

button {
  font: inherit;
  border: none;
  cursor: pointer;
  background: none;
  color: inherit;
}

main {
  display: flex;
  flex-direction: column;
  gap: 4rem;
  padding: 6rem 5vw 4rem;
}

.site-header {
  position: sticky;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 5vw;
  background: rgba(252, 247, 233, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  z-index: 100;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
}

.site-nav {
  display: flex;
  gap: 1.25rem;
  font-size: 0.95rem;
}

.site-nav a {
  color: var(--text-muted);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--blue);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.language-toggle {
  display: inline-flex;
  background: var(--white);
  padding: 0.25rem;
  border-radius: 999px;
  border: 1px solid rgba(0, 0, 0, 0.08);
}

.lang-btn {
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.lang-btn.active,
.lang-btn:focus-visible {
  background: var(--blue);
  color: var(--white);
}

.lang-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  position: relative;
}

.lang-btn:disabled::after {
  content: " (Soon)";
  font-size: 0.7em;
  opacity: 0.7;
}

.btn-primary {
  background: var(--red);
  color: var(--white);
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  box-shadow: 0 12px 24px rgba(212, 42, 32, 0.22);
  transition: background 0.2s ease, transform 0.2s ease;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--red-dark);
  transform: translateY(-1px);
}

.btn-primary.small {
  padding: 0.6rem 1rem;
  font-size: 0.9rem;
  box-shadow: none;
}

.btn-secondary {
  border: 1.5px solid var(--blue);
  color: var(--blue);
  padding: 0.85rem 1.4rem;
  border-radius: var(--radius);
  font-weight: 600;
  background: var(--white);
}

.btn-secondary.small {
  padding: 0.45rem 1rem;
  font-size: 0.9rem;
}

.btn-toggle,
.btn-chip {
  padding: 0.65rem 1.1rem;
  border-radius: 999px;
  border: 1px solid rgba(14, 99, 142, 0.25);
  color: var(--blue);
  background: rgba(14, 99, 142, 0.08);
}

.btn-chip:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-toggle.active,
.btn-chip.active {
  background: var(--blue);
  color: var(--white);
}

.btn-circle {
  width: 40px;
  height: 40px;
  border-radius: 999px;
  background: var(--white);
  border: 1px solid rgba(0, 0, 0, 0.15);
  font-size: 1.25rem;
}

.btn-circle:focus-visible {
  border-color: var(--blue);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  color: var(--blue);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.section-heading {
  max-width: 680px;
}

.section-heading h2 {
  margin: 0 0 0.5rem;
  font-size: clamp(2rem, 4vw, 2.6rem);
}

.section-heading p {
  margin: 0 0 1rem;
  color: var(--text-muted);
}

.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2.5rem;
  align-items: center;
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.5rem);
  margin: 0 0 1rem;
}

.hero-subtext {
  color: var(--text-muted);
  font-size: 1.1rem;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 1.5rem 0 0;
}

.trust-row {
  margin-top: 1.5rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.browser-frame {
  width: min(420px, 100%);
  border-radius: 32px;
  background: var(--white);
  box-shadow: 0 30px 60px rgba(14, 99, 142, 0.15);
  padding: 1.25rem;
}

.browser-top {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.browser-top span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.1);
}

.browser-content {
  background: var(--cream);
  border-radius: 24px;
  padding: 1rem;
}

.browser-toolbar {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.toolbar-pill {
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  font-size: 0.8rem;
}

.toolbar-pill.active {
  background: rgba(14, 99, 142, 0.15);
  color: var(--blue);
}

.toolbar-pill.muted {
  color: var(--text-muted);
}

.browser-text {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  font-size: 1rem;
}

.browser-text span {
  padding: 0.15rem 0.35rem;
  border-radius: 8px;
  background: rgba(14, 99, 142, 0.08);
}

.problem,
.solution,
.features,
.demo,
.feature-combinations,
.about,
.faq,
.cta {
  padding: 3rem 4vw;
  border-radius: 32px;
  background: var(--white);
  box-shadow: var(--card-shadow);
}

.solution,
.feature-combinations,
.about,
.cta {
  background: var(--cream);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.info-card,
.feature-card {
  padding: 1.5rem;
  border-radius: 20px;
  border: 1px solid rgba(0, 0, 0, 0.05);
  background: var(--white);
  min-height: 180px;
}

.info-card h3,
.feature-card h3 {
  margin-top: 0;
  color: var(--blue);
}

.solution-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.solution-panel {
  background: var(--white);
  border-radius: 24px;
  padding: 1.75rem;
}

.solution-panel ul {
  padding-left: 1.1rem;
  color: var(--text-muted);
}

.comparison-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
}

.comparison-block {
  background: var(--white);
  border-radius: 20px;
  padding: 1.25rem;
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.comparison-block.highlight {
  background: rgba(14, 99, 142, 0.06);
  border-color: rgba(14, 99, 142, 0.3);
}

.timeline {
  list-style: none;
  padding: 0;
  margin: 2rem 0 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.5rem;
}

.timeline li {
  background: var(--white);
  border-radius: 18px;
  padding: 1.25rem;
  border: 1px solid rgba(0, 0, 0, 0.04);
}

.demo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.demo-controls {
  background: var(--cream);
  border-radius: 24px;
  padding: 1.5rem;
  border: 1px solid rgba(14, 99, 142, 0.15);
}

.control-group {
  margin-bottom: 1.5rem;
}

.control-group span,
.control-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

#intensity-range {
  width: 100%;
}

.lang-message {
  min-height: 1.5rem;
  color: var(--blue);
  font-size: 0.9rem;
}

.demo-preview {
  background: var(--white);
  border-radius: 24px;
  padding: 1.5rem;
  border: 1px solid rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.demo-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.toolbar-label {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.demo-text {
  min-height: 220px;
  font-size: 1.1rem;
  line-height: 1.8;
}

.demo-text span {
  display: inline-block;
  margin-right: 0.35rem;
  padding: 0.05rem 0.15rem;
  border-radius: 6px;
  transition: background 0.2s ease;
}

.demo.phonology-active .demo-text span::first-letter {
  color: var(--blue);
  font-weight: 600;
}

.demo.morphology-active .demo-text span {
  background: rgba(250, 194, 43, var(--demo-highlight-opacity));
}

.demo.killcaps-active .demo-text .all-caps-word {
  text-transform: capitalize;
  font-weight: 500;
}

.demo.sentence-highlight-active .demo-text span:hover {
  background: rgba(14, 99, 142, 0.15);
  font-weight: 600;
  border-radius: 4px;
  padding: 0.1rem 0.2rem;
}

.demo.focus-zoom-active .demo-text span:hover {
  transform: scale(1.5);
  background: var(--white);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  border-radius: 8px;
  padding: 0.2rem 0.4rem;
  z-index: 10;
  position: relative;
  transition: transform 0.2s ease, background 0.2s ease;
}

.about-content {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-list {
  margin-top: 1.5rem;
}

.faq-list details {
  border: 1.5px solid rgba(14, 99, 142, 0.25);
  border-radius: 16px;
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
  background: var(--white);
}

.faq-list summary {
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

.faq-list summary::marker {
  display: none;
}

.faq-list details[open] {
  border-color: var(--blue);
}

.cta-card {
  background: var(--white);
  border-radius: 28px;
  padding: 2rem;
  text-align: center;
  box-shadow: var(--card-shadow);
}

.cta-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-top: 1.5rem;
}

.site-footer {
  background: var(--cream);
  padding: 3rem 5vw 2rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.5rem;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.site-footer h4 {
  margin-bottom: 0.8rem;
  color: var(--blue);
}

.site-footer a {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--text-muted);
}

.footer-bottom {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-top: 1px solid rgba(0, 0, 0, 0.08);
  padding-top: 1rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (max-width: 960px) {
  .site-nav {
    display: none;
  }

  .site-header {
    flex-wrap: wrap;
    gap: 1rem;
  }

  main {
    padding-top: 4rem;
  }
}

@media (max-width: 600px) {
  .hero-ctas,
  .cta-buttons {
    flex-direction: column;
  }

  .problem,
  .solution,
  .features,
  .demo,
  .feature-combinations,
  .about,
  .faq,
  .cta {
    padding: 2rem 6vw;
  }

  .site-header {
    padding: 1rem 4vw;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}