:root {
  color-scheme: light;
  --bg: #f7f8f3;
  --ink: #18201e;
  --muted: #5d6761;
  --line: #d9ddd2;
  --panel: #ffffff;
  --panel-alt: #edf3ea;
  --accent: #0f766e;
  --accent-strong: #0b4f4a;
  --warn: #b45309;
  --danger: #b42318;
  --ok: #146c43;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
}

a {
  color: inherit;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem clamp(1rem, 4vw, 3rem);
  border-bottom: 1px solid var(--line);
  background: rgba(247, 248, 243, 0.94);
  backdrop-filter: blur(10px);
}

.brand {
  font-weight: 800;
  letter-spacing: 0;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.nav a {
  text-decoration: none;
}

.lang {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.35rem 0.6rem;
  background: var(--panel);
  color: var(--ink);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: clamp(1.5rem, 5vw, 4rem);
  align-items: center;
  padding: clamp(3rem, 8vw, 6rem) clamp(1rem, 5vw, 5rem) 2rem;
}

.eyebrow {
  color: var(--accent-strong);
  font-size: 0.9rem;
  font-weight: 800;
  text-transform: uppercase;
}

h1 {
  max-width: 980px;
  margin: 0.5rem 0 1rem;
  font-size: clamp(2.4rem, 6vw, 5.8rem);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.7rem, 3vw, 2.8rem);
  line-height: 1.08;
}

h3 {
  margin: 0;
  font-size: 1.05rem;
}

.lead {
  max-width: 780px;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.5rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  padding: 0.65rem 0.95rem;
  background: var(--accent);
  color: #fff;
  font-weight: 750;
  text-decoration: none;
  cursor: pointer;
}

.button.secondary {
  background: transparent;
  color: var(--accent-strong);
}

.scorebox {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.25rem;
  background: var(--panel);
  box-shadow: 0 12px 35px rgba(25, 32, 30, 0.08);
}

.scorebox .label,
.metric-label {
  color: var(--muted);
  font-size: 0.9rem;
}

.score {
  margin: 0.4rem 0;
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 850;
  line-height: 1;
}

.meter {
  overflow: hidden;
  height: 12px;
  border-radius: 999px;
  background: #e5e8df;
}

.meter span {
  display: block;
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: var(--danger);
  transition: width 160ms ease, background 160ms ease;
}

.status {
  margin: 0.85rem 0 0;
  font-weight: 750;
}

main section {
  padding: clamp(2rem, 6vw, 4.5rem) clamp(1rem, 5vw, 5rem);
}

.intro {
  background: var(--panel);
  border-block: 1px solid var(--line);
}

.intro p,
.section-lead {
  max-width: 870px;
  color: var(--muted);
}

.diagnostic-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 380px);
  gap: 1.25rem;
  align-items: start;
}

.checklist {
  display: grid;
  gap: 0.8rem;
}

.category {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.category-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem;
  border-bottom: 1px solid var(--line);
}

.category-meta {
  color: var(--muted);
  font-size: 0.88rem;
}

.items {
  display: grid;
  gap: 0.2rem;
  padding: 0.75rem 1rem 1rem;
}

.check {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 0.65rem;
  align-items: start;
  padding: 0.45rem 0;
}

.check input {
  width: 18px;
  height: 18px;
  margin-top: 0.18rem;
  accent-color: var(--accent);
}

.summary {
  position: sticky;
  top: 78px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem;
  background: var(--panel);
}

.metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin: 1rem 0;
}

.metric {
  border-radius: 6px;
  background: var(--panel-alt);
  padding: 0.8rem;
}

.metric-value {
  display: block;
  font-size: 1.6rem;
  font-weight: 800;
}

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

.actions-list li {
  border-left: 4px solid var(--warn);
  padding: 0.65rem 0.75rem;
  background: #fff8ed;
}

.controls {
  background: var(--panel-alt);
}

.control-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.75rem;
  padding-left: 0;
  list-style: none;
}

.control-grid li {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem;
  background: var(--panel);
}

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

.ad-slot,
.affiliate-slot {
  min-height: 92px;
  border: 1px dashed #aab2aa;
  border-radius: 8px;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.65);
  color: var(--muted);
}

.affiliate-slot a {
  color: var(--accent-strong);
  font-weight: 750;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem clamp(1rem, 5vw, 5rem);
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: var(--panel);
}

@media (max-width: 820px) {
  .topbar,
  .nav,
  .hero,
  .diagnostic-layout {
    grid-template-columns: 1fr;
  }

  .topbar {
    align-items: flex-start;
  }

  .nav {
    flex-wrap: wrap;
  }

  .summary {
    position: static;
  }
}