:root {
  color-scheme: light;
  --ink: #14213d;
  --muted: #5f6b7a;
  --paper: #fffdf8;
  --canvas: #eef3f8;
  --line: #d9e1ea;
  --accent: #087e8b;
  --accent-dark: #075a63;
  --warm: #ffb703;
  --code: #101827;
  --code-ink: #e6edf7;
  --shadow: 0 24px 70px rgba(20, 33, 61, 0.12);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 5% 0%, rgba(8, 126, 139, 0.12), transparent 28rem),
    linear-gradient(180deg, #f7fafc 0%, var(--canvas) 100%);
  line-height: 1.65;
}

.page {
  width: min(1120px, calc(100% - 32px));
  margin: 32px auto 72px;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(32px, 6vw, 72px);
  color: #fff;
  background: linear-gradient(135deg, #14213d 0%, #0e5262 68%, #087e8b 100%);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.hero::after {
  content: "";
  position: absolute;
  width: 290px;
  height: 290px;
  right: -105px;
  top: -135px;
  border: 36px solid rgba(255, 183, 3, 0.2);
  border-radius: 50%;
}

.eyebrow {
  margin: 0 0 12px;
  color: #9fe7e9;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1, h2, h3 {
  line-height: 1.15;
  text-wrap: balance;
}

h1 {
  max-width: 760px;
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.25rem, 6vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.045em;
}

.deck {
  max-width: 700px;
  margin: 22px 0 0;
  color: #d9f1f2;
  font-size: clamp(1rem, 2vw, 1.2rem);
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.pill {
  padding: 7px 12px;
  color: #fff;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.22);
  border-radius: 999px;
  font-size: 0.86rem;
  font-weight: 650;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 24px;
  margin-top: 24px;
  align-items: start;
}

.card {
  padding: clamp(24px, 4vw, 44px);
  background: var(--paper);
  border: 1px solid rgba(217, 225, 234, 0.9);
  border-radius: 22px;
  box-shadow: 0 12px 40px rgba(20, 33, 61, 0.07);
}

.card + .card { margin-top: 20px; }

h2 {
  margin: 0 0 20px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.55rem, 3vw, 2.2rem);
  letter-spacing: -0.02em;
}

h3 {
  margin: 28px 0 10px;
  font-size: 1.02rem;
}

p { margin: 0 0 16px; }

code {
  padding: 0.12em 0.35em;
  background: #e8f0f3;
  border-radius: 5px;
  font-family: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  font-size: 0.9em;
}

pre {
  overflow-x: auto;
  margin: 18px 0;
  padding: 18px 20px;
  color: var(--code-ink);
  background: var(--code);
  border-radius: 14px;
  line-height: 1.55;
}

pre code { padding: 0; color: inherit; background: transparent; }

table {
  width: 100%;
  margin: 20px 0;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th, td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}

th { color: var(--accent-dark); font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; }

.requirements {
  padding-left: 0;
  list-style: none;
  counter-reset: requirement;
}

.requirements li {
  position: relative;
  min-height: 44px;
  margin: 0 0 12px;
  padding: 9px 8px 9px 54px;
  counter-increment: requirement;
}

.requirements li::before {
  content: counter(requirement);
  position: absolute;
  left: 0;
  top: 5px;
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  color: #fff;
  background: var(--accent);
  border-radius: 50%;
  font-weight: 800;
}

.note {
  margin-top: 24px;
  padding: 16px 18px;
  background: #fff7df;
  border-left: 4px solid var(--warm);
  border-radius: 0 10px 10px 0;
}

.rail { position: sticky; top: 24px; }

.rail h2 { font-size: 1.35rem; }
.rail .eyebrow { color: var(--accent-dark); }

.steps {
  margin: 0;
  padding: 0;
  list-style: none;
}

.steps li {
  position: relative;
  padding: 0 0 22px 28px;
  color: var(--muted);
  border-left: 2px solid var(--line);
}

.steps li::before {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  left: -6px;
  top: 6px;
  background: var(--paper);
  border: 2px solid #aeb9c7;
  border-radius: 50%;
}

.steps li.active { color: var(--ink); font-weight: 750; }
.steps li.active::before { background: var(--warm); border-color: var(--warm); }
.steps li:last-child { padding-bottom: 0; border-left-color: transparent; }

.button {
  display: block;
  margin-top: 24px;
  padding: 13px 16px;
  color: #fff;
  background: var(--accent);
  border-radius: 10px;
  font-weight: 750;
  text-align: center;
  text-decoration: none;
}

.button:hover { background: var(--accent-dark); }

.small { color: var(--muted); font-size: 0.86rem; }

footer {
  padding: 28px 8px 0;
  color: var(--muted);
  text-align: center;
  font-size: 0.86rem;
}

@media (max-width: 820px) {
  .layout { grid-template-columns: 1fr; }
  .rail { position: static; order: -1; }
}

@media print {
  body { background: #fff; }
  .page { width: 100%; margin: 0; }
  .hero, .card { box-shadow: none; }
  .hero { color: var(--ink); background: #fff; border: 2px solid var(--ink); }
  .hero .deck, .hero .eyebrow { color: var(--ink); }
  .pill { color: var(--ink); border-color: var(--ink); }
  .layout { grid-template-columns: 1fr; }
  .rail, footer { display: none; }
}