:root {
  --bg: #e8f0f4;
  --ink: #173041;
  --soft: #4d6575;
  --sea: #2a7f9e;
  --sand: #e7c38a;
  --white: #ffffff;
  --display: "Libre Baskerville", Georgia, serif;
  --body: "Manrope", system-ui, sans-serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--body);
  color: var(--ink);
  background:
    linear-gradient(180deg, #d9ebf2 0%, var(--bg) 35%, #f7fafc 100%);
  line-height: 1.7;
}

a { color: var(--sea); }
.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 5vw;
}
.logo {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--ink);
  text-decoration: none;
}
.pill {
  text-decoration: none;
  background: var(--ink);
  color: #fff;
  padding: 0.55rem 0.95rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.9rem;
}

.hero {
  min-height: 72vh;
  display: grid;
  align-items: end;
  padding: 8vh 5vw 10vh;
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(115deg, rgba(23, 48, 65, 0.88), rgba(42, 127, 158, 0.55)),
    radial-gradient(circle at 80% 20%, rgba(231, 195, 138, 0.45), transparent 40%),
    linear-gradient(160deg, #1a3b4d, #2a7f9e);
  color: #fff;
}
.hero::after {
  content: "";
  position: absolute;
  inset: auto -10% -30% 40%;
  height: 70%;
  background: radial-gradient(circle, rgba(231,195,138,0.35), transparent 60%);
  animation: glow 10s ease-in-out infinite alternate;
}
@keyframes glow {
  from { transform: translateX(0); opacity: 0.7; }
  to { transform: translateX(-8%); opacity: 1; }
}
.hero-copy { position: relative; z-index: 1; max-width: 760px; animation: up 0.8s ease both; }
@keyframes up {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: none; }
}
.kicker {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--sand);
  margin: 0 0 0.7rem;
}
.hero h1 {
  font-family: var(--display);
  font-size: clamp(2.4rem, 7vw, 4.4rem);
  line-height: 1.1;
  margin: 0 0 1rem;
}
.sub { font-size: 1.15rem; max-width: 38rem; opacity: 0.95; }
.btn {
  display: inline-flex;
  margin-top: 1.3rem;
  background: #fff;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
  padding: 0.85rem 1.2rem;
  border-radius: 999px;
  transition: transform 0.2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn.dark { background: var(--sand); color: var(--ink); }

.strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  padding: 1.5rem 5vw;
  margin-top: -2rem;
  position: relative;
  z-index: 2;
}
.strip > div {
  background: var(--white);
  border-radius: 18px;
  padding: 1.1rem 1.2rem;
  box-shadow: 0 16px 40px rgba(23, 48, 65, 0.08);
  display: grid;
  gap: 0.2rem;
  animation: up 0.9s ease both;
}
.strip strong { font-size: 1rem; }
.strip span { color: var(--soft); font-size: 0.92rem; }

.preview { padding: 3rem 5vw 4rem; }
.preview article {
  max-width: 760px;
  background: rgba(255,255,255,0.8);
  border-radius: 22px;
  padding: 2rem;
  border: 1px solid rgba(23,48,65,0.08);
}
.preview h2 {
  font-family: var(--display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1.25;
}
.preview h2 a { color: var(--ink); text-decoration: none; }
.meta { color: var(--soft); font-weight: 600; font-size: 0.9rem; }
.more { font-weight: 700; text-decoration: none; }

.article {
  max-width: 720px;
  margin: 1rem auto 3rem;
  padding: 2rem 5vw;
  background: rgba(255,255,255,0.78);
  border-radius: 24px;
  border: 1px solid rgba(23,48,65,0.08);
  animation: up 0.7s ease both;
}
.article h1 {
  font-family: var(--display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.2;
  margin: 0.2rem 0 1rem;
}
.intro { color: var(--soft); font-size: 1.1rem; }
.article h2 {
  font-family: var(--display);
  font-size: 1.35rem;
  margin-top: 2rem;
}
.article ol { padding-left: 1.2rem; }
.callout {
  margin-top: 2.2rem;
  padding: 1.4rem;
  border-radius: 18px;
  background: linear-gradient(135deg, #173041, #2a7f9e);
  color: #fff;
}
.callout h3 { margin-top: 0; font-family: var(--display); }

footer {
  padding: 2rem 5vw 3rem;
  color: var(--soft);
  font-size: 0.92rem;
  border-top: 1px solid rgba(23,48,65,0.08);
}

.top-nav { display: flex; align-items: center; gap: 0.9rem; }
.top-nav a { text-decoration: none; color: var(--ink); font-weight: 600; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.7rem; }
.btn-outline {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255,255,255,0.5);
}
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 1rem;
  margin-bottom: 1rem;
  max-width: 1100px;
}
.section-head h2 {
  font-family: var(--display);
  margin: 0;
  font-size: 1.6rem;
}
.guide-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  max-width: 1100px;
}
.guide-grid article {
  background: rgba(255,255,255,0.85);
  border-radius: 18px;
  padding: 1.25rem;
  border: 1px solid rgba(23,48,65,0.08);
}
.guide-grid h3 {
  font-family: var(--display);
  font-size: 1.15rem;
  line-height: 1.3;
  margin: 0.3rem 0 0.5rem;
}
.guide-grid h3 a { color: var(--ink); text-decoration: none; }
.method {
  padding: 1rem 5vw 3rem;
  max-width: 760px;
}
.method h2 { font-family: var(--display); }
.method ol { line-height: 1.9; }
.toc { padding-left: 1.1rem; display: grid; gap: 0.55rem; font-size: 1.05rem; }

@media (max-width: 800px) {
  .strip, .guide-grid { grid-template-columns: 1fr; }
  .top-nav a:not(.pill) { display: none; }
}