/* Dentra about page — Apple-inspired product landing */

:root {
  --dentra-teal: #0d9488;
  --dentra-teal-dark: #0f766e;
  --dentra-teal-soft: rgba(13, 148, 136, 0.12);
  --dentra-teal-glow: rgba(13, 148, 136, 0.22);
  --dentra-bg: #f5f5f7;
  --dentra-surface: #ffffff;
  --dentra-text: #1d1d1f;
  --dentra-muted: #6e6e73;
  --dentra-border: rgba(0, 0, 0, 0.08);
  --dentra-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  --dentra-shadow-lg: 0 24px 64px rgba(13, 148, 136, 0.12);
  --dentra-max: 76rem;
  --dentra-ease: cubic-bezier(0.25, 0.1, 0.25, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", system-ui, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.5;
  color: var(--dentra-text);
  background: var(--dentra-bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--dentra-teal);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.dentra-skip {
  position: absolute;
  left: -9999px;
  top: 0.5rem;
  z-index: 100;
  padding: 0.5rem 1rem;
  background: var(--dentra-text);
  color: #fff;
  border-radius: 8px;
}

.dentra-skip:focus {
  left: 0.5rem;
}

/* Top bar */
.dentra-top {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(245, 245, 247, 0.88);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--dentra-border);
}

.dentra-top-inner {
  max-width: var(--dentra-max);
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
}

.dentra-top-back {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--dentra-muted);
  justify-self: start;
}

.dentra-top-back:hover {
  color: var(--dentra-text);
  text-decoration: none;
}

.dentra-wordmark {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--dentra-teal);
  justify-self: center;
}

.dentra-top-cta {
  justify-self: end;
  padding: 0.5rem 1.1rem;
  font-size: 0.875rem;
}

/* Buttons */
.dentra-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.35rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.2s var(--dentra-ease), box-shadow 0.2s var(--dentra-ease);
}

.dentra-btn:hover {
  text-decoration: none;
  transform: scale(1.02);
}

.dentra-btn--lg {
  padding: 0.85rem 1.75rem;
  font-size: 1.0625rem;
}

.dentra-btn--primary {
  background: var(--dentra-teal);
  color: #fff;
  box-shadow: 0 4px 20px rgba(13, 148, 136, 0.4);
}

.dentra-btn--primary:hover {
  box-shadow: 0 6px 28px rgba(13, 148, 136, 0.5);
}

.dentra-btn--ghost {
  background: var(--dentra-surface);
  color: var(--dentra-text);
  border: 1px solid var(--dentra-border);
}

.dentra-btn--invert {
  background: #fff;
  color: var(--dentra-teal-dark);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
}

/* Hero */
.dentra-hero {
  text-align: center;
  padding: clamp(4.5rem, 14vw, 8rem) 1.5rem clamp(4rem, 10vw, 6rem);
  max-width: var(--dentra-max);
  margin: 0 auto;
  background: radial-gradient(
      ellipse 90% 60% at 50% -10%,
      var(--dentra-teal-glow),
      transparent 65%
    ),
    var(--dentra-bg);
}

.dentra-hero-eyebrow {
  margin: 0 0 1.25rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dentra-teal);
}

.dentra-hero-title {
  margin: 0 0 1.25rem;
  font-size: clamp(2.5rem, 7.5vw, 5.25rem);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1.02;
}

.dentra-hero-tagline {
  margin: 0 auto 2.25rem;
  max-width: 44rem;
  font-size: clamp(1.125rem, 2.2vw, 1.5rem);
  color: var(--dentra-muted);
  line-height: 1.55;
}

.dentra-hero-tagline strong {
  color: var(--dentra-text);
  font-weight: 600;
}

.dentra-hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.85rem;
  margin-bottom: clamp(3rem, 8vw, 4.5rem);
}

/* Stats strip */
.dentra-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 0;
  padding: 0;
  max-width: 52rem;
  margin-inline: auto;
}

@media (min-width: 640px) {
  .dentra-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.dentra-stat {
  padding: 1.35rem 1rem;
  background: var(--dentra-surface);
  border: 1px solid var(--dentra-border);
  border-radius: 20px;
  box-shadow: var(--dentra-shadow);
}

.dentra-stat-value {
  margin: 0 0 0.25rem;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--dentra-teal);
  line-height: 1;
}

.dentra-stat-label {
  margin: 0;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--dentra-muted);
  line-height: 1.35;
}

/* Sections */
.dentra-section {
  padding: clamp(4rem, 10vw, 6.5rem) 1.5rem;
}

.dentra-section--alt {
  background: var(--dentra-surface);
}

.dentra-section--spotlight {
  background: linear-gradient(180deg, var(--dentra-bg) 0%, rgba(13, 148, 136, 0.06) 50%, var(--dentra-bg) 100%);
}

.dentra-section-inner {
  max-width: var(--dentra-max);
  margin: 0 auto;
}

.dentra-section-label {
  margin: 0 0 0.65rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dentra-teal);
}

.dentra-section-title {
  margin: 0 0 1.25rem;
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.08;
  max-width: 20ch;
}

.dentra-section-title--hero {
  max-width: 16ch;
}

.dentra-section-lede {
  margin: 0 0 3rem;
  max-width: 42rem;
  font-size: clamp(1.0625rem, 2vw, 1.3125rem);
  color: var(--dentra-muted);
  line-height: 1.6;
}

.dentra-section-lede--wide {
  max-width: 52rem;
}

.dentra-section-lede strong {
  color: var(--dentra-text);
  font-weight: 600;
}

/* Cards */
.dentra-cards {
  display: grid;
  gap: 1.25rem;
}

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

@media (min-width: 960px) {
  .dentra-cards--three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .dentra-cards--four {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.dentra-card {
  padding: 1.75rem;
  background: var(--dentra-bg);
  border: 1px solid var(--dentra-border);
  border-radius: 22px;
  transition: box-shadow 0.25s var(--dentra-ease), transform 0.25s var(--dentra-ease);
}

.dentra-section--alt .dentra-card {
  background: var(--dentra-bg);
}

.dentra-card--lift:hover {
  box-shadow: var(--dentra-shadow-lg);
  transform: translateY(-4px);
}

.dentra-card-icon {
  font-size: 2.25rem;
  line-height: 1;
  margin-bottom: 0.85rem;
}

.dentra-card-title {
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.dentra-card-desc {
  margin: 0;
  font-size: 0.9875rem;
  color: var(--dentra-muted);
  line-height: 1.5;
}

/* Feature grid — 4 × 2 */
.dentra-features {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

@media (min-width: 720px) {
  .dentra-features {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.dentra-feature {
  padding: 1.5rem 1.25rem;
  background: var(--dentra-surface);
  border: 1px solid var(--dentra-border);
  border-radius: 20px;
  text-align: center;
  box-shadow: var(--dentra-shadow);
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s var(--dentra-ease);
}

.dentra-feature:hover {
  border-color: rgba(13, 148, 136, 0.4);
  box-shadow: var(--dentra-shadow-lg);
  transform: translateY(-3px);
}

.dentra-feature-icon {
  font-size: 2.5rem;
  line-height: 1;
  margin-bottom: 0.75rem;
}

.dentra-feature-title {
  margin: 0 0 0.4rem;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.dentra-feature-desc {
  margin: 0;
  font-size: 0.875rem;
  color: var(--dentra-muted);
  line-height: 1.45;
}

/* Stack strip */
.dentra-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.dentra-stack-label {
  margin-top: 3rem;
}

.dentra-pill {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--dentra-text);
  background: var(--dentra-surface);
  border: 1px solid var(--dentra-border);
  border-radius: 999px;
}

.dentra-section--alt .dentra-pill {
  background: var(--dentra-bg);
}

/* Pricing / CTA band */
.dentra-pricing {
  padding: clamp(4.5rem, 12vw, 7rem) 1.5rem;
  background: linear-gradient(145deg, var(--dentra-teal-dark) 0%, var(--dentra-teal) 55%, #14b8a6 100%);
  color: #fff;
  text-align: center;
}

.dentra-pricing-inner {
  max-width: 40rem;
  margin: 0 auto;
}

.dentra-pricing .dentra-section-label {
  color: rgba(255, 255, 255, 0.75);
}

.dentra-pricing-title {
  margin: 0 0 1.25rem;
  font-size: clamp(2.25rem, 6vw, 3.75rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.05;
}

.dentra-pricing-lede {
  margin: 0 0 2rem;
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.92);
}

.dentra-pricing-lede strong {
  color: #fff;
  font-weight: 600;
}

.dentra-pricing-points {
  margin: 0 0 2.5rem;
  padding: 0;
  list-style: none;
  text-align: left;
  display: inline-block;
}

.dentra-pricing-points li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.65rem;
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.45;
}

.dentra-pricing-points li::before {
  content: "✓";
  position: absolute;
  left: 0;
  font-weight: 700;
  color: #fff;
}

/* Footer */
.dentra-footer {
  padding: 2.5rem 1.5rem 3rem;
  text-align: center;
  border-top: 1px solid var(--dentra-border);
}

.dentra-footer p {
  margin: 0 0 0.35rem;
  font-size: 0.875rem;
  color: var(--dentra-muted);
}

.dentra-footer-links {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
}

@media (max-width: 520px) {
  .dentra-top-inner {
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "back cta"
      "wordmark wordmark";
  }

  .dentra-top-back {
    grid-area: back;
  }

  .dentra-top-cta {
    grid-area: cta;
  }

  .dentra-wordmark {
    grid-area: wordmark;
    justify-self: center;
    margin-top: 0.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .dentra-btn,
  .dentra-card,
  .dentra-feature {
    transition: none;
  }

  .dentra-card--lift:hover,
  .dentra-feature:hover {
    transform: none;
  }
}