:root {
  --bg: #f5f7fa;
  --panel: #ffffff;
  --ink: #172033;
  --muted: #637083;
  --line: #d9e1ea;
  --accent: #126b5f;
  --accent-2: #b65a32;
  --soft: #edf7f4;
  --warn: #fff3dc;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
}

a {
  color: var(--accent);
}

header {
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  color: var(--ink);
  font-size: 17px;
  font-weight: 800;
  text-decoration: none;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

nav a {
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
}

main {
  max-width: 1120px;
  margin: 0 auto;
  padding: 28px 22px 38px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(320px, 1.1fr) minmax(300px, 0.9fr);
  gap: 22px;
  align-items: stretch;
  margin-bottom: 20px;
}

h1 {
  margin: 0 0 14px;
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.03;
  letter-spacing: 0;
}

h2 {
  margin: 0 0 12px;
  font-size: 24px;
  letter-spacing: 0;
}

h3 {
  margin: 0 0 8px;
  font-size: 17px;
  letter-spacing: 0;
}

p {
  margin: 0 0 12px;
}

.lead {
  color: #3d4758;
  font-size: 18px;
  max-width: 740px;
}

.panel,
.tool,
.ad-slot {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.panel,
.tool {
  padding: 16px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 20px 0;
}

.two {
  display: grid;
  grid-template-columns: minmax(300px, 0.9fr) minmax(320px, 1.1fr);
  gap: 16px;
  margin: 20px 0;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 10px 14px;
  border-radius: 7px;
  background: var(--accent);
  color: white;
  text-decoration: none;
  font-weight: 800;
  border: 1px solid var(--accent);
}

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

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

ul,
ol {
  margin: 0;
  padding-left: 20px;
}

li {
  margin: 6px 0;
}

.muted {
  color: var(--muted);
}

.soft {
  background: var(--soft);
}

.warn {
  background: var(--warn);
}

.ad-slot {
  min-height: 92px;
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
  margin: 18px 0;
}

.checklist label {
  display: block;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 10px;
  color: var(--ink);
  background: #fbfcfe;
  font: 14px/1.45 "Segoe UI", Arial, sans-serif;
}

textarea {
  min-height: 150px;
  resize: vertical;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 10px;
  text-align: left;
  vertical-align: top;
  font-size: 14px;
}

th {
  background: #eef2f6;
}

footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  padding: 18px 22px 28px;
  text-align: center;
  font-size: 13px;
}

@media (max-width: 850px) {
  header {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero,
  .grid,
  .two {
    grid-template-columns: 1fr;
  }
}