/* Shared article shell for the /learn teardowns.
   Every rule here was byte-identical across all ten inline stylesheets.
   At-rules stay inline in each article so media queries keep their original
   position at the end of that file's cascade. */

:root {
  --max-w: 820px;
}
html, body {
  height: auto; overflow-x: hidden;
}
.site-nav {
  position: fixed; top: 0; left: 0; right: 0;
    height: var(--nav-height); z-index: 100;
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 2.5rem;
    border-bottom: 1px solid var(--white-faint);
    background: rgba(30,44,58,0.95);
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
}
.nav-wordmark {
  font-family: var(--font-display);
    font-size: 1rem; font-weight: 700; letter-spacing: 0.04em;
    color: var(--white); text-decoration: none; flex-shrink: 0;
}
.nav-wordmark span {
  color: var(--lime);
}
.nav-links {
  display: flex; align-items: center; gap: 2rem;
}
.nav-link {
  font-size: 0.85rem; font-weight: 400; letter-spacing: 0.08em;
    text-transform: uppercase; color: var(--white-dim); text-decoration: none;
    transition: color var(--dur-base);
}
.nav-link:hover {
  color: var(--white);
}
.nav-link.active {
  color: var(--white);
}
.nav-link-cta {
  font-size: 0.85rem; font-weight: 400; letter-spacing: 0.08em;
    text-transform: uppercase; color: var(--navy-dark); background: var(--lime);
    padding: 0.4rem 1rem; text-decoration: none; transition: background var(--dur-base);
}
.nav-link-cta:hover {
  background: var(--lime-hover);
}
.nav-progress {
  position: absolute; bottom: 0; left: 0;
    height: 1px; background: var(--lime); width: 0%;
    transition: width 0.2s linear;
}
.page {
  min-height: 100vh; padding-top: var(--nav-height); position: relative;
}
.page::before {
  content: ''; position: fixed; inset: 0;
    background-image:
      linear-gradient(var(--grid) 1px, transparent 1px),
      linear-gradient(90deg, var(--grid) 1px, transparent 1px);
    background-size: 72px 72px; pointer-events: none; z-index: 0;
}
.article {
  position: relative; z-index: 1;
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 5vw 2rem 8rem;
}
.back {
  display: inline-flex; align-items: center; gap: 6px;
    font-size: 0.75rem; font-weight: 400; letter-spacing: 0.1em;
    text-transform: uppercase; color: var(--white-dim);
    text-decoration: none; margin-bottom: 3rem;
    transition: color var(--dur-base);
}
.back:hover {
  color: var(--white);
}
.article-header {
  margin-bottom: 3.5rem;
}
.article-eyebrow {
  font-size: 0.72rem; font-weight: 400; letter-spacing: 0.14em;
    text-transform: uppercase; color: var(--lime); margin-bottom: 1rem;
}
.article-intro {
  font-size: 1.1rem; font-weight: 400; line-height: 1.75;
    color: rgba(240,239,240,0.72); max-width: 58ch;
    border-left: 2px solid var(--lime);
    padding-left: 1.2rem;
}
.article-intro strong {
  color: var(--white); font-weight: 600;
}
.article-meta {
  display: flex; gap: 1.5rem; margin-top: 1.4rem;
    font-size: 0.72rem; font-weight: 300; letter-spacing: 0.08em;
    text-transform: uppercase; color: rgba(240,239,240,0.3);
}
.divider {
  border: none; border-top: 1px solid var(--white-faint); margin: 3rem 0;
}
.section {
  margin-bottom: 3.5rem;
}
.section-label {
  font-size: 0.7rem; font-weight: 500; letter-spacing: 0.14em;
    text-transform: uppercase; color: var(--lime); margin-bottom: 0.8rem;
}
.section-headline {
  font-family: var(--font-display);
    font-size: clamp(1.5rem, 2.8vw, 2.2rem);
    font-weight: 700; line-height: 1.1; letter-spacing: -0.02em;
    color: var(--white); margin-bottom: 1rem;
}
.section-headline .dim {
  color: var(--white-dim);
}
.body {
  font-size: 1rem; font-weight: 400; line-height: 1.8;
    color: rgba(240,239,240,0.7); max-width: 64ch;
}
.body + .body {
  margin-top: 1rem;
}
.body strong {
  color: var(--white); font-weight: 600;
}
.insight {
  background: rgba(184,212,0,0.06);
    border-left: 2px solid var(--lime);
    padding: 1.2rem 1.4rem; margin: 2rem 0;
}
.insight-label {
  font-size: 0.68rem; font-weight: 500; letter-spacing: 0.12em;
    text-transform: uppercase; color: var(--lime); margin-bottom: 0.5rem;
}
.insight-text {
  font-size: 1rem; font-weight: 400; line-height: 1.7; color: rgba(240,239,240,0.7);
}
.insight-text strong {
  color: var(--white); font-weight: 600;
}
.stat-block {
  display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 2px; margin: 2.5rem 0;
}
.stat {
  background: var(--lime); border: 1px solid var(--lime); padding: 1.4rem 1.2rem 1.6rem;
}
.stat-num {
  font-family: var(--font-display);
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    font-weight: 700; line-height: 0.95;
    letter-spacing: -0.03em; color: var(--navy-dark); margin-bottom: 0.6rem;
}
.stat-label {
  font-size: 0.9rem; font-weight: 300; line-height: 1.45;
    color: rgba(30,44,58,0.65);
    text-transform: none; letter-spacing: 0; margin-bottom: 0;
}
.stat-label strong {
  color: #1e2c3a; font-weight: 600;
}
.stat-source {
  font-size: 0.68rem; color: rgba(30,44,58,0.42); margin-top: 0.4rem;
}
.callout {
  background: #1e2c3a; border: 1px solid rgba(240,239,240,0.06);
    padding: 1.4rem; margin: 2rem 0;
}
.callout-label {
  font-size: 0.68rem; font-weight: 500; letter-spacing: 0.12em;
    text-transform: uppercase; color: rgba(240,239,240,0.35); margin-bottom: 0.6rem;
}
.callout-text {
  font-size: 1rem; font-weight: 400; line-height: 1.7; color: rgba(240,239,240,0.78);
}
.callout-text strong {
  color: #f0eff0; font-weight: 600;
}
.nav-next {
  display: flex; flex-direction: column; gap: 0.4rem;
    margin-top: 4rem; padding-top: 3rem;
    border-top: 1px solid var(--white-faint);
}
.nav-next-label {
  font-size: 0.7rem; font-weight: 400; letter-spacing: 0.1em;
    text-transform: uppercase; color: rgba(240,239,240,0.3);
}
.nav-next-link {
  font-family: var(--font-display);
    font-size: clamp(1.2rem, 2vw, 1.6rem);
    font-weight: 700; line-height: 1.1; letter-spacing: -0.02em;
    color: var(--white); text-decoration: none;
    transition: color var(--dur-base);
    display: inline-flex; align-items: center; gap: 10px;
}
.nav-next-link:hover {
  color: var(--lime);
}
.hc {
  margin: 2rem 0 0; border: 1px solid var(--white-faint); background: #151f29;
}
.hc-list {
  list-style: none; margin: 0; padding: 0;
}
.hc-item {
  display: grid; grid-template-columns: auto 1fr; gap: 0 1rem; padding: 1.1rem 1.4rem;
    border-bottom: 1px solid rgba(240,239,240,0.07); align-items: start;
}
.hc-box {
  appearance: none; -webkit-appearance: none; margin: 2px 0 0; width: 20px; height: 20px;
    border: 1px solid rgba(240,239,240,0.28); background: transparent; cursor: pointer;
    flex-shrink: 0; position: relative; transition: background var(--dur-base), border-color var(--dur-base);
}
.hc-box:hover {
  border-color: var(--lime);
}
.hc-box:checked {
  background: var(--lime); border-color: var(--lime);
}
.hc-box:checked::after {
  content: ''; position: absolute; left: 6px; top: 2px; width: 5px; height: 10px;
    border: solid var(--navy-dark); border-width: 0 2px 2px 0; transform: rotate(45deg);
}
.hc-box:focus-visible {
  outline: 2px solid var(--lime); outline-offset: 2px;
}
.hc-label {
  cursor: pointer; display: block;
}
.hc-claim {
  display: block; font-size: 0.95rem; font-weight: 400; line-height: 1.55; color: var(--white);
}
.hc-why {
  display: block; font-size: 0.8rem; font-weight: 400; line-height: 1.55;
    color: rgba(240,239,240,0.5); margin-top: 0.35rem;
}
.hc-box:checked ~ .hc-label .hc-claim {
  color: rgba(240,239,240,0.42);
}
.hc-box:checked ~ .hc-label .hc-why {
  color: rgba(240,239,240,0.28);
}
.hc-result {
  display: grid; grid-template-columns: auto 1fr; gap: 1.4rem; align-items: center;
    padding: 1.3rem 1.4rem; background: rgba(184,212,0,0.06); border-bottom: 1px solid rgba(240,239,240,0.07);
}
.hc-score {
  display: flex; align-items: baseline;
}
.hc-score-num {
  font-family: var(--font-display); font-size: clamp(2.4rem,5vw,3.4rem); font-weight: 700;
    line-height: 0.9; letter-spacing: -0.03em; color: var(--lime);
}
.hc-score-of {
  font-family: var(--font-display); font-size: 1.1rem; font-weight: 700;
    color: rgba(240,239,240,0.35); margin-left: 2px;
}
.hc-meter {
  height: 6px; background: rgba(255,255,255,0.08); margin-bottom: 0.7rem;
}
.hc-meter-fill {
  height: 100%; width: 0%; background: var(--lime); transition: width var(--dur-base) var(--ease-out);
}
.hc-verdict {
  font-size: 0.95rem; font-weight: 600; line-height: 1.4; color: var(--white);
}
.hc-next {
  font-size: 0.85rem; font-weight: 400; line-height: 1.6; color: rgba(240,239,240,0.6); padding: 1rem 1.4rem;
}