:root {
  --bg: #000e1a;
  --panel: rgba(255, 255, 255, 0.055);
  --panel-strong: rgba(0, 42, 84, 0.72);
  --line: rgba(0, 170, 255, 0.35);
  --accent: #00aaff;
  --accent-2: #ffd24a;
  --text: #f8fbff;
  --muted: #b8c7d8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: linear-gradient(135deg, #000e1a 0%, #001933 48%, #00264d 100%);
  color: var(--text);
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.7;
}

a {
  color: inherit;
}

.blog-hero {
  min-height: 72vh;
  padding: 28px clamp(18px, 5vw, 72px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  background:
    linear-gradient(rgba(0, 14, 26, 0.56), rgba(0, 14, 26, 0.84)),
    url("../img/Binaural Power Banner.jpg") center/cover;
  border-bottom: 1px solid var(--line);
}

.blog-hero nav {
  position: absolute;
  top: 24px;
  left: clamp(18px, 5vw, 72px);
}

.blog-hero nav a,
.back-link {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
}

.eyebrow {
  color: var(--accent-2);
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.blog-hero h1 {
  max-width: 930px;
  margin: 0 0 18px;
  font-size: clamp(38px, 8vw, 76px);
  line-height: 1.02;
}

.blog-hero p,
.article-hero p {
  max-width: 760px;
  color: var(--muted);
  font-size: 20px;
}

.wrap,
.article-wrap {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 44px 0 72px;
}

.priority {
  margin-bottom: 48px;
}

.priority h2 {
  font-size: clamp(26px, 4vw, 42px);
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 22px;
}

.post-card {
  min-height: 250px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 0 18px rgba(0, 140, 255, 0.18);
}

.post-card span {
  color: var(--accent-2);
  font-weight: 800;
  font-size: 13px;
  text-transform: uppercase;
}

.post-card h3 {
  font-size: 24px;
  line-height: 1.18;
}

.post-card a {
  text-decoration: none;
}

.article-hero {
  padding: 28px clamp(18px, 5vw, 72px) 42px;
  background: var(--panel-strong);
  border-bottom: 1px solid var(--line);
}

.article-hero h1 {
  max-width: 980px;
  font-size: clamp(34px, 6vw, 64px);
  line-height: 1.05;
  margin-bottom: 16px;
}

.article-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 34px;
}

.article-content {
  font-size: 19px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 0;
}

.article-meta span,
.tag {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 12px;
  color: var(--muted);
  font-size: 14px;
  background: rgba(255, 255, 255, 0.045);
}

.article-content h2 {
  margin-top: 44px;
  font-size: 34px;
  line-height: 1.12;
}

.article-content h3 {
  margin-top: 30px;
  font-size: 25px;
}

.article-content img {
  width: 100%;
  border-radius: 8px;
  border: 1px solid var(--line);
  margin: 24px 0;
}

.quick-answer,
.callout,
.video-box,
.related-list,
.faq-list,
.decision-box {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.055);
  padding: 22px;
  margin: 26px 0;
}

.quick-answer {
  border-left: 4px solid var(--accent-2);
}

.callout {
  border-left: 4px solid var(--accent);
}

.video-box {
  background: rgba(0, 42, 84, 0.42);
}

.related-list a {
  display: block;
  padding: 10px 0;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.related-list a:last-child {
  border-bottom: 0;
}

.comparison {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.comparison th,
.comparison td {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 14px;
  text-align: left;
  vertical-align: top;
}

.comparison th {
  color: var(--accent-2);
  background: rgba(0, 42, 84, 0.5);
}

.checklist li,
.faq-list li {
  margin: 10px 0;
}

.cta-box,
.toc {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 22px;
  box-shadow: 0 0 18px rgba(0, 140, 255, 0.2);
}

.toc {
  position: sticky;
  top: 18px;
  align-self: start;
}

.toc a {
  display: block;
  margin: 12px 0;
  color: var(--muted);
  text-decoration: none;
}

.article-cta {
  display: inline-block;
  margin-top: 12px;
  padding: 14px 22px;
  border-radius: 8px;
  border: 2px solid var(--accent);
  background: linear-gradient(145deg, #003366, #005599);
  color: #fff;
  text-decoration: none;
  font-weight: 800;
  box-shadow: 0 0 16px rgba(0, 170, 255, 0.55);
}

.note {
  color: var(--muted);
  font-size: 15px;
}

.probability {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 14px;
  margin: 24px 0;
}

.probability div {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  background: rgba(0, 42, 84, 0.32);
}

.probability strong {
  display: block;
  color: var(--accent-2);
  font-size: 28px;
}

@media (max-width: 860px) {
  .article-wrap {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
  }
}