:root {
  --navy: #1e3a8a;
  --navy-dark: #172554;
  --blue: #2563eb;
  --blue-dark: #1e40af;
  --gold: #d4af37;
  --gold-soft: #fbbf24;
  --cream: #f8fafc;
  --cream-alt: #f5f7fa;
  --white: #ffffff;
  --text: #111827;
  --body: #374151;
  --muted: #6b7280;
  --border: rgba(37, 99, 235, 0.12);
  --shadow-sm: 0 16px 36px rgba(15, 23, 42, 0.08), 0 4px 12px rgba(37, 99, 235, 0.04);
  --shadow-md: 0 24px 58px rgba(15, 23, 42, 0.12), 0 8px 20px rgba(37, 99, 235, 0.06);
  --shadow-lg: 0 36px 88px rgba(15, 23, 42, 0.16), 0 10px 24px rgba(37, 99, 235, 0.08);
  --radius-sm: 14px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --container: min(1180px, calc(100% - 2rem));
  --transition: 0.28s ease;
  --font-body: "Inter", sans-serif;
  --font-heading: "Poppins", sans-serif;
  --hero-glow: rgba(212, 175, 55, 0.18);
  --hero-tint: rgba(37, 99, 235, 0.12);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--body);
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.12), transparent 28%),
    radial-gradient(circle at top right, rgba(212, 175, 55, 0.1), transparent 24%),
    linear-gradient(180deg, var(--cream) 0%, #eef5ff 44%, var(--cream-alt) 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(37, 99, 235, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 99, 235, 0.03) 1px, transparent 1px);
  background-size: 76px 76px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.28), transparent 72%);
  pointer-events: none;
  z-index: -1;
}

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

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

button {
  font: inherit;
}

p {
  margin: 0;
  line-height: 1.75;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--text);
  font-family: var(--font-heading);
  line-height: 1.12;
}

ul {
  margin: 0;
  padding-left: 1.15rem;
}

li + li {
  margin-top: 0.55rem;
}

.page-shell {
  overflow: clip;
}

.container {
  width: var(--container);
  margin: 0 auto;
}

.blog-topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  padding: 1rem 0 0;
}

.blog-topbar-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 1rem;
  border-radius: 22px;
  border: 1px solid rgba(37, 99, 235, 0.12);
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-sm);
}

.blog-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  min-width: 0;
}

.blog-brand-mark {
  width: 3.1rem;
  height: 3.1rem;
  display: grid;
  place-items: center;
  padding: 0.12rem;
  overflow: hidden;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(37, 99, 235, 0.1);
  box-shadow: 0 14px 28px rgba(30, 58, 138, 0.18);
}

.blog-brand-mark img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  border-radius: 16px;
}

.blog-brand-copy {
  display: grid;
  line-height: 1.1;
}

.blog-brand-copy strong {
  color: var(--navy-dark);
  font-size: 0.98rem;
}

.blog-brand-copy span {
  color: var(--muted);
  font-size: 0.82rem;
}

.blog-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-left: auto;
}

.blog-links a,
.blog-home-link {
  padding: 0.55rem 0.82rem;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
  transition: color var(--transition), background var(--transition), transform var(--transition);
}

.blog-links a:hover,
.blog-links a.is-current,
.blog-home-link:hover {
  color: var(--navy-dark);
  background: rgba(37, 99, 235, 0.08);
  transform: translateY(-2px);
}

.blog-home-link {
  border: 1px solid rgba(212, 175, 55, 0.34);
  background: linear-gradient(135deg, var(--gold), var(--gold-soft));
  color: var(--text);
  box-shadow: 0 16px 30px rgba(212, 175, 55, 0.2);
}

.blog-hero {
  position: relative;
  padding: 4.8rem 0 3rem;
}

.blog-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 18% 18%, var(--hero-tint), transparent 22%),
    radial-gradient(circle at 84% 18%, var(--hero-glow), transparent 20%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.24), transparent 72%);
  pointer-events: none;
}

.blog-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  gap: 2rem;
  align-items: center;
}

.blog-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.44rem 0.8rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(37, 99, 235, 0.1);
  color: var(--gold);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.blog-hero h1 {
  margin-top: 1rem;
  font-size: clamp(2.7rem, 5vw, 4.7rem);
  max-width: 11ch;
}

.blog-subtitle {
  margin-top: 1.2rem;
  font-size: clamp(1.08rem, 1.8vw, 1.28rem);
  color: var(--navy);
  max-width: 44rem;
}

.blog-intro {
  margin-top: 1rem;
  color: var(--muted);
  max-width: 45rem;
}

.blog-pill-row,
.hero-stat-row,
.hero-card-tags,
.sidebar-chip-row,
.cta-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.blog-pill-row {
  margin-top: 1.8rem;
}

.blog-pill,
.hero-stat,
.hero-card-tag,
.sidebar-chip,
.cta-chip {
  padding: 0.52rem 0.84rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(37, 99, 235, 0.12);
  color: var(--navy-dark);
  font-size: 0.82rem;
  font-weight: 700;
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.06);
}

.hero-stat-row {
  margin-top: 1.2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.15rem;
  padding: 0.82rem 1.35rem;
  border-radius: 12px;
  font-weight: 700;
  border: 1px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
}

.btn:hover {
  transform: translateY(-3px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--blue), var(--navy));
  color: #fff;
  box-shadow: 0 18px 36px rgba(37, 99, 235, 0.26);
}

.btn-secondary {
  background: linear-gradient(135deg, var(--gold), var(--gold-soft));
  color: var(--text);
  border-color: rgba(212, 175, 55, 0.4);
  box-shadow: 0 18px 36px rgba(212, 175, 55, 0.22);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.82);
  color: var(--navy-dark);
  border-color: rgba(37, 99, 235, 0.14);
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.08);
}

.hero-visual {
  position: relative;
  display: grid;
  gap: 1rem;
}

.hero-panel {
  position: relative;
  padding: 1.4rem;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(37, 99, 235, 0.1);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.97), rgba(244, 248, 255, 0.92));
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at top right, var(--hero-glow), transparent 24%),
    radial-gradient(circle at bottom left, var(--hero-tint), transparent 28%);
  pointer-events: none;
}

.hero-visual-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.95rem;
}

.hero-mini-card,
.section-card,
.sidebar-card,
.footer-card {
  border-radius: 22px;
  border: 1px solid rgba(37, 99, 235, 0.1);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(245, 247, 250, 0.93));
  box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255, 255, 255, 0.84);
}

.hero-mini-card {
  padding: 1rem;
  min-height: 132px;
  transition: transform var(--transition), box-shadow var(--transition);
}

.hero-mini-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.hero-mini-card strong {
  display: block;
  color: var(--navy-dark);
  font-size: 1.08rem;
}

.hero-mini-card p {
  margin-top: 0.55rem;
  color: var(--muted);
}

.blog-content {
  padding: 0 0 5rem;
}

.blog-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.34fr);
  gap: 1.5rem;
  align-items: start;
}

.article-stack {
  display: grid;
  gap: 1.4rem;
}

.section-card {
  padding: 1.55rem;
}

.section-tag {
  display: inline-flex;
  margin-bottom: 0.9rem;
  color: var(--gold);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.section-card h2 {
  font-size: clamp(1.85rem, 3vw, 2.5rem);
}

.section-card h3 {
  font-size: 1.2rem;
}

.section-card p + p {
  margin-top: 1rem;
}

.info-grid,
.step-grid,
.compare-grid,
.formula-grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.3rem;
}

.info-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.step-grid,
.compare-grid,
.formula-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.info-card,
.step-card,
.compare-card,
.formula-card {
  position: relative;
  padding: 1rem;
  border-radius: 18px;
  border: 1px solid rgba(37, 99, 235, 0.1);
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.06);
  transition: transform var(--transition), box-shadow var(--transition);
}

.info-card:hover,
.step-card:hover,
.compare-card:hover,
.formula-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card-index,
.card-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.3rem;
  height: 2.3rem;
  padding: 0 0.7rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--navy), var(--blue));
  color: #fff;
  font-size: 0.82rem;
  font-weight: 800;
  box-shadow: 0 12px 24px rgba(30, 58, 138, 0.22);
}

.card-badge-gold {
  background: linear-gradient(135deg, var(--gold), var(--gold-soft));
  color: var(--text);
  box-shadow: 0 12px 24px rgba(212, 175, 55, 0.22);
}

.info-card h3,
.step-card h3,
.compare-card h3,
.formula-card h3 {
  margin-top: 0.8rem;
}

.progress-stack {
  display: grid;
  gap: 1rem;
  margin-top: 1.3rem;
}

.progress-card {
  padding: 1rem 1rem 1.05rem;
  border-radius: 18px;
  border: 1px solid rgba(37, 99, 235, 0.1);
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.06);
}

.progress-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.progress-card-head strong {
  color: var(--navy-dark);
}

.progress-card-head span {
  color: var(--gold);
  font-weight: 800;
}

.progress-track {
  margin-top: 0.85rem;
  height: 0.74rem;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.08);
  overflow: hidden;
}

.progress-fill {
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--blue), var(--gold-soft));
  transition: width 0.9s ease;
}

.highlight-box,
.quote-box,
.cta-box {
  position: relative;
  overflow: hidden;
  margin-top: 1.3rem;
  padding: 1.2rem 1.25rem;
  border-radius: 22px;
  border: 1px solid rgba(212, 175, 55, 0.24);
  background: linear-gradient(180deg, rgba(255, 248, 228, 0.94), rgba(255, 255, 255, 0.92));
  box-shadow: 0 18px 34px rgba(212, 175, 55, 0.12);
}

.quote-box {
  background: linear-gradient(180deg, rgba(239, 246, 255, 0.92), rgba(255, 255, 255, 0.92));
  border-color: rgba(37, 99, 235, 0.16);
}

.highlight-box::before,
.quote-box::before,
.cta-box::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at top right, rgba(251, 191, 36, 0.18), transparent 24%),
    radial-gradient(circle at bottom left, rgba(37, 99, 235, 0.12), transparent 28%);
  pointer-events: none;
}

.sidebar-stack {
  position: sticky;
  top: 6.7rem;
  display: grid;
  gap: 1rem;
}

.sidebar-card {
  padding: 1.2rem;
}

.sidebar-card h3 {
  font-size: 1.2rem;
}

.sidebar-card p,
.sidebar-card li {
  color: var(--muted);
}

.sidebar-card ul {
  margin-top: 0.85rem;
}

.sidebar-cta {
  margin-top: 1rem;
}

.footer-links {
  display: grid;
  gap: 0.8rem;
  margin-top: 1rem;
}

.footer-links a {
  padding: 0.78rem 0.9rem;
  border-radius: 16px;
  border: 1px solid rgba(37, 99, 235, 0.1);
  background: rgba(255, 255, 255, 0.84);
  color: var(--navy-dark);
  font-weight: 700;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.footer-links a:hover {
  transform: translateY(-3px);
  background: #fff;
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.08);
}

.blog-footer {
  padding: 0 0 2.6rem;
}

.blog-footer-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.footer-card {
  padding: 1.2rem;
}

.footer-card p {
  color: var(--muted);
}

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

body.theme-calm {
  --hero-glow: rgba(212, 175, 55, 0.16);
  --hero-tint: rgba(96, 165, 250, 0.14);
}

body.theme-drive {
  --hero-glow: rgba(251, 191, 36, 0.18);
  --hero-tint: rgba(37, 99, 235, 0.16);
}

body.theme-science {
  --hero-glow: rgba(212, 175, 55, 0.14);
  --hero-tint: rgba(30, 58, 138, 0.18);
}

body.theme-commerce {
  --hero-glow: rgba(212, 175, 55, 0.2);
  --hero-tint: rgba(37, 99, 235, 0.12);
}

@media (max-width: 1080px) {
  .blog-hero-grid,
  .blog-layout {
    grid-template-columns: 1fr;
  }

  .sidebar-stack {
    position: static;
  }
}

@media (max-width: 860px) {
  .blog-topbar-inner {
    flex-wrap: wrap;
  }

  .blog-links {
    margin-left: 0;
  }

  .info-grid,
  .step-grid,
  .compare-grid,
  .formula-grid,
  .blog-footer-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual-grid {
    grid-template-columns: 1fr;
  }

  .hero-mini-card {
    min-height: auto;
  }
}

@media (max-width: 560px) {
  .blog-hero {
    padding-top: 4.2rem;
  }

  .blog-topbar-inner,
  .hero-panel,
  .section-card,
  .sidebar-card,
  .footer-card {
    border-radius: 20px;
  }

  .blog-links,
  .hero-actions,
  .blog-pill-row,
  .hero-stat-row,
  .hero-card-tags,
  .sidebar-chip-row,
  .cta-chip-row {
    flex-direction: column;
    align-items: stretch;
  }

  .btn,
  .blog-home-link,
  .footer-links a {
    width: 100%;
  }

  .section-card {
    padding: 1.2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}