:root {
  --nav-bg: #0f172a;
  --brand: #facc15;
  --pri: #1e40af;
  --txt: #1e293b;
  --bg: #f8fafc;
  --card: #ffffff;
  --border: #e2e8f0;
  --grn: #15803d;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
body {
  background: var(--bg);
  color: var(--txt);
  line-height: 1.65;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
header {
  background: var(--brand);
  padding: 14px 20px;
  border-bottom: 2px solid #eab308;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}
.logo {
  font-size: 20px;
  font-weight: 900;
  text-decoration: none;
  color: var(--nav-bg);
  letter-spacing: 0.5px;
}
.nav-links {
  display: flex;
  gap: 10px;
  list-style: none;
}
.nav-links a {
  text-decoration: none;
  font-size: 13px;
  font-weight: 700;
  color: var(--nav-bg);
  background: rgba(0,0,0,0.06);
  padding: 6px 12px;
  border-radius: 4px;
}
.container {
  max-width: 760px;
  width: 100%;
  margin: 0 auto;
  padding: 16px;
  flex: 1;
}
.card {
  background: var(--card);
  border-radius: 10px;
  border: 1px solid var(--border);
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}
.card h1 {
  font-size: 22px;
  color: var(--nav-bg);
  margin-bottom: 8px;
}
.card h2 {
  font-size: 18px;
  color: var(--pri);
  margin: 20px 0 10px 0;
}
.card p {
  font-size: 14.5px;
  color: #334155;
  margin-bottom: 12px;
}
.card ul, .card ol {
  margin-left: 20px;
  margin-bottom: 14px;
  font-size: 14.5px;
  color: #334155;
}
.card li {
  margin-bottom: 6px;
}
.btn-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
  margin-bottom: 14px;
}
.tab-btn {
  padding: 12px;
  background: #e2e8f0;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  color: var(--txt);
  text-align: center;
}
.tab-btn.active {
  background: var(--pri);
  color: #fff;
}
.img-frame {
  width: 100%;
  min-height: 480px;
  background: #f1f5f9;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  overflow: hidden;
}
.img-frame img {
  width: 100%;
  height: auto;
  display: block;
}
.actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 14px;
}
.btn {
  padding: 12px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  color: #fff;
}
.btn-pdf { background: var(--nav-bg); }
.btn-down { background: var(--grn); }
footer {
  background: var(--nav-bg);
  color: #94a3b8;
  padding: 24px 16px;
  font-size: 12px;
  text-align: center;
}
footer a {
  color: var(--brand);
  text-decoration: none;
  margin: 0 6px;
}