:root {
  --bg: #07111f;
  --text: #f5f7fb;
  --muted: #b8c5d8;
  --primary: #2ed3c6;
  --secondary: #63a4ff;
  --border: rgba(255,255,255,0.14);
  --card: rgba(255,255,255,0.08);
  --shadow: 0 24px 70px rgba(0,0,0,0.35);
  --container: 1180px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Arial, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(46,211,198,0.13), transparent 25%),
    linear-gradient(180deg, #06101d, #081525);
  color: var(--text);
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  width: 100%;
  display: block;
}

.container {
  width: min(var(--container), calc(100% - 32px));
  margin: auto;
}

.news-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(5, 12, 22, 0.88);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.nav {
  height: 78px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-weight: 800;
  font-size: 1.2rem;
}

.back-link {
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--border);
  font-weight: 700;
}

.single-news-hero {
  padding: 90px 0 50px;
}

.category {
  display: inline-block;
  margin-bottom: 16px;
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.single-news-hero h1 {
  max-width: 850px;
  font-size: clamp(2.4rem, 5vw, 4.8rem);
  line-height: 1;
  margin-bottom: 20px;
}

.intro {
  max-width: 720px;
  color: var(--muted);
  font-size: 1.15rem;
  line-height: 1.7;
}

.single-news-content {
  padding: 40px 0 100px;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 34px;
  align-items: start;
}

.article-card,
.side-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 30px;
  box-shadow: var(--shadow);
}

.article-card {
  overflow: hidden;
}

.article-card img {
  height: 430px;
  object-fit: cover;
}

.article-card p {
  padding: 0 34px;
  color: var(--muted);
  line-height: 1.85;
  font-size: 1.05rem;
  margin-top: 24px;
}

.article-card p:last-child {
  padding-bottom: 34px;
}

.side-card {
  padding: 28px;
  position: sticky;
  top: 100px;
}

.side-card h3 {
  margin-bottom: 18px;
  font-size: 1.5rem;
}

.side-card ul {
  list-style: none;
  display: grid;
  gap: 14px;
}

.side-card li {
  color: var(--muted);
  line-height: 1.6;
}

footer {
  padding: 30px;
  text-align: center;
  color: var(--muted);
  border-top: 1px solid rgba(255,255,255,0.08);
}

@media (max-width: 900px) {
  .article-layout {
    grid-template-columns: 1fr;
  }

  .side-card {
    position: static;
  }

  .article-card img {
    height: 300px;
  }
}

body.day-theme {
  --bg: #f6fbff;
  --dark: #ffffff;
  --text: #07111f;
  --muted: #41546b;
  --primary: #007f8f;
  --secondary: #3b82f6;
  --accent: #f59e0b;
  --border: rgba(7,17,31,0.14);
  --card: rgba(255,255,255,0.75);
  --shadow: 0 24px 70px rgba(7,17,31,0.16);

  background:
    radial-gradient(circle at top left, rgba(255,209,102,0.28), transparent 28%),
    radial-gradient(circle at bottom right, rgba(59,130,246,0.18), transparent 30%),
    linear-gradient(180deg, #f7fbff, #eaf7ff);
}

body.day-theme .site-header {
  background: rgba(255,255,255,0.82);
  border-bottom: 1px solid rgba(7,17,31,0.10);
}

body.day-theme .nav-menu a {
  color: #26384f;
}

body.day-theme .btn.secondary,
body.day-theme .business-tab,
body.day-theme .news-card,
body.day-theme .info-card,
body.day-theme .animated-info-card,
body.day-theme .quote-box {
  background: rgba(255,255,255,0.7);
  border-color: rgba(7,17,31,0.12);
}

body.day-theme .video-overlay {
  background: linear-gradient(180deg, transparent 45%, rgba(255,255,255,0.28));
}

.footer {
  padding: 60px 20px 30px;
  text-align: center;
  border-top: 1px solid var(--border);
}

.footer-container {
  max-width: 900px;
  margin: 0 auto;
}

.footer-description {
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 30px;
}

.footer-socials {
  display: flex;
  justify-content: center;
  gap: 18px;
  margin-bottom: 25px;
}

.social-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--text);
  transition: 0.3s;
}

.social-icon:hover {
  transform: translateY(-4px);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #031015;
}

.footer-copy {
  font-size: 0.9rem;
  color: var(--muted);
}