:root {
  color-scheme: light dark;
  --bg: #0f1419;
  --surface: #1a2332;
  --text: #e8eef7;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-hover: #7dd3fc;
  --border: rgba(148, 163, 184, 0.25);
  --radius: 12px;
  font-family: system-ui, "Segoe UI", Roboto, Ubuntu, sans-serif;
  line-height: 1.5;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f8fafc;
    --surface: #ffffff;
    --text: #0f172a;
    --muted: #475569;
    --accent: #0369a1;
    --accent-hover: #0284c7;
    --border: rgba(15, 23, 42, 0.12);
  }
}

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

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
}

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

a:hover,
a:focus-visible {
  color: var(--accent-hover);
  text-decoration: underline;
}

.wrap {
  max-width: 42rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

header {
  margin-bottom: 2rem;
}

h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
}

.lead {
  color: var(--muted);
  margin: 0;
  font-size: 1rem;
}

.cards {
  display: grid;
  gap: 0.75rem;
}

.card {
  display: block;
  padding: 1rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.15s ease;
}

.card:hover,
.card:focus-visible {
  border-color: var(--accent);
  outline: none;
}

.card-title {
  font-weight: 600;
  font-size: 1.05rem;
  margin: 0 0 0.25rem;
}

.card-desc {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.back {
  display: inline-block;
  margin-bottom: 1.25rem;
  font-size: 0.9rem;
}

section {
  margin-top: 1.5rem;
}

section h2 {
  font-size: 1.1rem;
  margin: 0 0 0.5rem;
}

ul.links {
  margin: 0;
  padding-left: 1.25rem;
}

ul.links li {
  margin-bottom: 0.35rem;
}

code {
  font-size: 0.85em;
  padding: 0.15em 0.35em;
  border-radius: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
}

.site-foot {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.site-footer {
  margin-top: 1.75rem;
  padding-top: 1.25rem;
  padding-bottom: 0.5rem;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.95rem;
}

.site-footer p {
  margin: 0;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.meta-date {
  font-size: 0.9rem;
  color: var(--muted);
  margin-top: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.65rem 1.15rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  line-height: 1.3;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn:hover,
.btn:focus-visible {
  text-decoration: none;
  outline: none;
}

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

.btn.primary:hover,
.btn.primary:focus-visible {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #fff;
}

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

.btn.ghost:hover,
.btn.ghost:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

.btn.small {
  padding: 0.45rem 0.85rem;
  font-size: 0.88rem;
}

.landing-wrap {
  max-width: 44rem;
}

.landing-hero {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.landing-hero h1 {
  font-size: clamp(1.65rem, 3.5vw, 2.25rem);
  margin: 0 0 0.5rem;
}

.landing-hero .landing-slogan {
  font-size: 1.1rem;
  color: var(--muted);
  margin: 0 0 1.25rem;
  max-width: 36rem;
}

.landing-hero--free {
  --tier-accent: #64748b;
}

.landing-hero--standard {
  --tier-accent: #0284c7;
}

.landing-hero--premium {
  --tier-accent: #7c3aed;
}

.landing-hero--social {
  --tier-accent: #ea580c;
}

.landing-badge {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: color-mix(in srgb, var(--tier-accent, var(--accent)) 18%, transparent);
  color: var(--tier-accent, var(--accent));
  margin-bottom: 0.65rem;
}

.video-block {
  margin-bottom: 2rem;
}

.video-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: calc(var(--radius) + 2px);
  overflow: hidden;
  border: 1px solid var(--border);
  background: linear-gradient(145deg, var(--surface) 0%, rgba(127, 127, 127, 0.12) 100%);
}

.video-frame-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: 1.5rem;
  text-align: center;
  gap: 0.75rem;
}

.video-play {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: color-mix(in srgb, var(--tier-accent, var(--accent)) 22%, transparent);
  color: var(--tier-accent, var(--accent));
  font-size: 1.25rem;
}

.video-frame p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--muted);
  max-width: 22rem;
}

.video-scenarios {
  display: grid;
  gap: 0.75rem;
  margin-top: 1rem;
}

@media (min-width: 36rem) {
  .video-scenarios {
    grid-template-columns: repeat(3, 1fr);
  }
}

.video-scenario {
  padding: 0.85rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
}

.video-scenario strong {
  display: block;
  font-size: 0.88rem;
  margin-bottom: 0.25rem;
}

.video-scenario span {
  font-size: 0.82rem;
  color: var(--muted);
}

.persona-grid {
  display: grid;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

@media (min-width: 36rem) {
  .persona-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

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

.persona-card h3 {
  font-size: 0.95rem;
  margin: 0 0 0.35rem;
}

.persona-card p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.feature-table-wrap {
  overflow-x: auto;
  margin-bottom: 2rem;
}

.feature-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.feature-table th,
.feature-table td {
  padding: 0.55rem 0.65rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

.feature-table th {
  font-weight: 600;
}

.feature-table td:last-child {
  color: var(--muted);
}

.feature-yes {
  color: #16a34a;
}

.feature-no {
  color: var(--muted);
}

.landing-cta {
  margin-bottom: 2rem;
  padding: 1.5rem;
  border-radius: calc(var(--radius) + 2px);
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--tier-accent, var(--accent)) 8%, var(--surface));
}

.landing-cta h2 {
  font-size: 1.15rem;
  margin: 0 0 0.5rem;
}

.landing-cta p {
  margin: 0 0 1rem;
  font-size: 0.92rem;
  color: var(--muted);
}

.landing-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.landing-ota {
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.landing-ota h2 {
  font-size: 1.05rem;
  margin: 0 0 0.5rem;
}

.landing-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 0.25rem;
}

.landing-section {
  margin-bottom: 2rem;
}

.landing-section h2 {
  font-size: 1.15rem;
  margin: 0 0 0.75rem;
}

.pain-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.pain-list li {
  padding: 0.9rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 0.92rem;
  color: var(--muted);
}

.pain-list strong {
  display: block;
  color: var(--text);
  margin-bottom: 0.25rem;
  font-size: 0.95rem;
}

.benefit-grid {
  display: grid;
  gap: 0.75rem;
}

@media (min-width: 36rem) {
  .benefit-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

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

.benefit-card h3 {
  font-size: 0.95rem;
  margin: 0 0 0.35rem;
}

.benefit-card p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.faq-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.65rem;
}

.faq-list details {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 0.75rem 1rem;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.92rem;
}

.faq-list details p {
  margin: 0.65rem 0 0;
  font-size: 0.88rem;
  color: var(--muted);
}

.landing-upsell {
  margin: 1.5rem 0 2rem;
  padding: 1rem 1.15rem;
  border-radius: var(--radius);
  border: 1px dashed var(--border);
  font-size: 0.95rem;
}

.landing-proof {
  margin-bottom: 2rem;
  padding: 1rem 1.15rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 0.9rem;
  color: var(--muted);
}

.landing-proof ul {
  margin: 0.5rem 0 0;
  padding-left: 1.2rem;
}