:root {
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --line: #e2e8f0;
  --brand: #059669;
  --brand-2: #0891b2;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #f0fdf4 0%, var(--bg) 180px);
  line-height: 1.65;
}

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

a:hover {
  text-decoration: underline;
}

.site-header,
.site-footer {
  background: #ffffffcc;
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.site-footer {
  border-top: 1px solid var(--line);
  border-bottom: 0;
  margin-top: 3rem;
}

.inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0.9rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.01em;
}

.brand small {
  color: var(--muted);
  font-weight: 500;
  margin-left: 0.35rem;
}

.nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.nav a {
  color: #0f172a;
  font-size: 0.92rem;
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 1.25rem 1rem 0;
}

.hero {
  background: linear-gradient(135deg, #ecfdf5, #f0f9ff);
  border: 1px solid #c7f3dd;
  border-radius: 16px;
  padding: 1.4rem 1.1rem;
  margin-bottom: 1rem;
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.45rem, 2.7vw, 2rem);
  line-height: 1.25;
}

.subtitle {
  margin: 0.6rem 0 0;
  color: #334155;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem;
  margin: 0 0 1rem;
  box-shadow: 0 3px 16px rgba(2, 6, 23, 0.04);
}

.tool-first {
  border-color: #b7e8d3;
  background: linear-gradient(135deg, #ffffff, #f0fdf4);
}

h2,
h3 {
  margin: 0 0 0.55rem;
  line-height: 1.35;
}

h2 {
  font-size: 1.1rem;
}

h3 {
  font-size: 1rem;
}

p,
ul,
ol {
  margin: 0 0 0.8rem;
}

ul,
ol {
  padding-left: 1.2rem;
}

li + li {
  margin-top: 0.32rem;
}

article + article {
  border-top: 1px dashed var(--line);
  padding-top: 0.8rem;
  margin-top: 0.8rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55rem;
}

.grid a {
  display: block;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.55rem 0.65rem;
  color: #0f172a;
  background: #fff;
  font-size: 0.93rem;
}

.grid a:hover {
  border-color: #9edfc6;
  background: #f0fdf4;
  text-decoration: none;
}

.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0.58rem 0.95rem;
  border-radius: 10px;
  background: linear-gradient(90deg, var(--brand), var(--brand-2));
  color: #fff;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.cta:hover {
  opacity: 0.95;
  text-decoration: none;
}

code {
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  padding: 0.1rem 0.32rem;
  font-size: 0.9em;
}

.site-footer p {
  margin: 0;
  color: var(--muted);
}

@media (max-width: 760px) {
  .inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
  }

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