/* Dive Theory Decoded - shared guide styles. Matches the main site brand
   (dark navy + cyan, Fraunces / Inter / JetBrains Mono). */
:root {
  --bg: #06121f;
  --bg-2: #091c2e;
  --panel: #0c2236;
  --panel-2: #0e2840;
  --line: rgba(168, 196, 224, 0.14);
  --line-strong: rgba(168, 196, 224, 0.26);
  --ink: #eef5fb;
  --ink-2: #aebfd2;
  --ink-3: #7d91a8;
  --cyan: #33c9f2;
  --teal: #2bd4c4;
  --r: 16px;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family:
    "Inter",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-size: 18px;
}

/* top bar / wordmark */
.bar {
  background: var(--bg-2);
  border-bottom: 1px solid var(--line);
  padding: 16px 24px;
}
.bar .wordmark {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600;
  font-size: 18px;
  color: var(--ink);
  text-decoration: none;
}
.bar .wordmark .mark {
  flex: 0 0 auto;
}

main {
  max-width: 740px;
  margin: 0 auto;
  padding: 52px 24px 76px;
}
.eyebrow {
  color: var(--cyan);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 14px;
}
h1 {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600;
  font-size: 42px;
  line-height: 1.1;
  color: var(--ink);
  letter-spacing: -0.5px;
  margin-bottom: 18px;
}
h2 {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600;
  font-size: 28px;
  color: var(--ink);
  margin: 42px 0 14px;
}
h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  margin: 26px 0 8px;
}
p {
  margin: 0 0 16px;
  color: var(--ink-2);
}
a {
  color: var(--cyan);
}
strong {
  color: var(--ink);
}
.lead {
  font-size: 20px;
  color: var(--ink);
}

.formula {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  background: var(--panel);
  border: 1px solid var(--line-strong);
  color: var(--ink);
  padding: 20px 24px;
  border-radius: 12px;
  font-size: 17px;
  line-height: 1.5;
  margin: 20px 0;
  overflow-x: auto;
}
.formula .hl {
  color: var(--teal);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 22px 0;
  font-size: 16px;
}
th,
td {
  text-align: left;
  padding: 12px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th {
  background: var(--panel);
  color: var(--ink);
  font-weight: 600;
}
td {
  color: var(--ink-2);
}
td.mono,
th.mono {
  font-family: "JetBrains Mono", ui-monospace, monospace;
}

.callout {
  border-left: 3px solid var(--cyan);
  background: var(--panel);
  padding: 16px 20px;
  border-radius: 0 10px 10px 0;
  margin: 24px 0;
  color: var(--ink-2);
}

.cta {
  background: linear-gradient(140deg, var(--panel-2), var(--panel));
  border: 1px solid var(--line-strong);
  border-radius: var(--r);
  padding: 30px 28px;
  margin: 42px 0;
  text-align: center;
}
.cta h2 {
  color: var(--ink);
  margin: 0 0 8px;
  font-size: 24px;
}
.cta p {
  color: var(--ink-2);
  margin: 0 0 18px;
}
.btn {
  display: inline-block;
  background: var(--cyan);
  color: #042036;
  font-weight: 700;
  text-decoration: none;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 17px;
}
.btn.ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line-strong);
  margin-left: 8px;
}

.faq h3 {
  margin-top: 22px;
}

/* hub cards */
.intro {
  font-size: 19px;
  color: var(--ink-3);
  margin-bottom: 34px;
  max-width: 60ch;
}
.card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 24px 26px;
  margin-bottom: 18px;
  transition:
    border-color 0.15s,
    transform 0.15s;
}
.card:hover {
  border-color: var(--cyan);
  transform: translateY(-2px);
}
.card h2 {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600;
  font-size: 23px;
  color: var(--ink);
  margin: 0 0 6px;
}
.card p {
  color: var(--ink-3);
  font-size: 16px;
  margin: 0;
}
.card .more {
  color: var(--cyan);
  font-weight: 600;
  font-size: 15px;
  margin-top: 10px;
  display: inline-block;
}

footer {
  border-top: 1px solid var(--line);
  padding: 28px 24px;
  text-align: center;
  color: var(--ink-3);
  font-size: 14px;
}
footer a {
  color: var(--ink-3);
}
.disclaimer {
  font-size: 13px;
  color: var(--ink-3);
  margin-top: 30px;
}