:root {
  --color-primary: #1a365d;
  --color-secondary: #2c5282;
  --color-accent: #3182ce;
  --color-light: #f7fafc;
  --color-border: #e2e8f0;
  --color-success: #38a169;
  --color-warning: #d69e2e;
  --color-danger: #c53030;
  --color-text: #2d3748;
  --spacing-sm: 12px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --max: 1160px;
  --radius: 10px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.65;
  color: var(--color-text);
  background: #fff;
}

a { color: var(--color-accent); }

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

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.site-header {
  background: var(--color-primary);
  color: #fff;
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,.1);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.brand {
  color: #fff;
  text-decoration: none;
  font-size: 1.35rem;
  font-weight: 700;
}

.brand span { opacity: .75; font-weight: 500; font-size: .85rem; display: block; }

.site-nav {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.nav-toggle {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.nav-toggle-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 8px;
  background: transparent;
  color: #fff;
  cursor: pointer;
}

.nav-toggle-icon {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 999px;
  transition: background .25s ease;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 999px;
  transition: transform .25s ease;
}

.nav-toggle-icon::before { top: -6px; }
.nav-toggle-icon::after { top: 6px; }

.site-nav a {
  color: rgba(255,255,255,.9);
  text-decoration: none;
  font-size: .9rem;
}

.site-nav a:hover { color: #fff; }

.disclaimer-strip {
  background: #edf2f7;
  border-bottom: 1px solid var(--color-border);
  padding: .65rem 0;
  font-size: .84rem;
}

.disclaimer-strip p { margin: 0; }

.page-hero {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  padding: var(--spacing-2xl) 0 var(--spacing-xl);
}

.breadcrumb {
  font-size: .85rem;
  margin-bottom: var(--spacing-md);
  opacity: .9;
}

.breadcrumb a { color: #fff; }

.platform-hero {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--spacing-lg);
  align-items: start;
}

.platform-hero h1 {
  margin: 0 0 .5rem;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.2;
}

.platform-hero-lead {
  margin: 0;
  opacity: .92;
  max-width: 52ch;
}

.score-box {
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.25);
  border-radius: var(--radius);
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: center;
  min-width: 110px;
}

.score-box strong {
  display: block;
  font-size: 2rem;
  line-height: 1;
}

.score-box span { font-size: .8rem; opacity: .85; }

.hero-logo {
  height: 44px;
  width: auto;
  max-width: 180px;
  margin-bottom: var(--spacing-md);
  object-fit: contain;
  object-position: left;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: var(--spacing-lg);
}

.hero-badge {
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.3);
  border-radius: 999px;
  padding: .35rem .75rem;
  font-size: .78rem;
  font-weight: 600;
}

.content-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--spacing-xl);
  padding: var(--spacing-2xl) 0;
  align-items: start;
}

.prose h2 {
  color: var(--color-primary);
  font-size: 1.5rem;
  margin: var(--spacing-xl) 0 var(--spacing-md);
}

.prose h2:first-child { margin-top: 0; }

.prose h3 {
  color: var(--color-secondary);
  font-size: 1.1rem;
  margin: var(--spacing-lg) 0 var(--spacing-sm);
}

.prose p, .prose ul { margin: 0 0 var(--spacing-md); }

.prose ul { padding-left: 1.2rem; }

.toc {
  background: var(--color-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.toc h2 {
  margin: 0 0 var(--spacing-sm) !important;
  font-size: 1rem !important;
}

.toc ol {
  margin: 0;
  padding-left: 1.2rem;
  font-size: .92rem;
}

.toc a { text-decoration: none; }
.toc a:hover { text-decoration: underline; }

.notice-box {
  background: #ebf8ff;
  border-left: 4px solid var(--color-accent);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: .92rem;
  margin-bottom: var(--spacing-lg);
}

.pros-cons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

.pros-box, .cons-box {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--spacing-md);
  background: var(--color-light);
}

.pros-box h4, .cons-box h4 {
  margin: 0 0 var(--spacing-sm);
  font-size: .95rem;
}

.pros-box h4 { color: var(--color-success); }
.cons-box h4 { color: var(--color-danger); }

.pros-box ul, .cons-box ul {
  margin: 0;
  padding-left: 1.1rem;
  font-size: .9rem;
}

.rating-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .9rem;
  margin: var(--spacing-md) 0 var(--spacing-lg);
}

.rating-table th, .rating-table td {
  padding: .65rem .75rem;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
}

.rating-table th {
  background: var(--color-primary);
  color: #fff;
}

.rating-bar {
  height: 8px;
  background: var(--color-border);
  border-radius: 999px;
  overflow: hidden;
  min-width: 120px;
}

.rating-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-secondary));
  border-radius: 999px;
}

.faq-block details {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-light);
}

.faq-block summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--color-primary);
}

.faq-block p {
  margin: var(--spacing-sm) 0 0;
  font-size: .92rem;
}

.sidebar {
  position: sticky;
  top: 88px;
}

.side-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--spacing-lg);
  background: var(--color-light);
  margin-bottom: var(--spacing-md);
}

.side-card h3 {
  margin: 0 0 var(--spacing-md);
  font-size: 1rem;
  color: var(--color-primary);
}

.fact-row {
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-sm);
  font-size: .88rem;
  padding: .45rem 0;
  border-bottom: 1px solid var(--color-border);
}

.fact-row:last-child { border-bottom: none; }

.btn {
  display: inline-block;
  text-align: center;
  text-decoration: none;
  border-radius: 6px;
  padding: .65rem 1rem;
  font-size: .9rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background .2s, color .2s;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  width: 100%;
}

.btn-primary:hover { background: var(--color-secondary); color: #fff; }

.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  width: 100%;
  margin-top: .5rem;
}

.btn-ghost:hover {
  background: #fff;
  border-color: var(--color-accent);
}

.pp-reg-band {
  background: var(--color-light);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-2xl) 0;
}

.pp-reg-title {
  font-size: .78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--color-accent);
  text-align: center;
  margin: 0 0 var(--spacing-lg);
}

.pp-reg-logos {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md) var(--spacing-xl);
}

.pp-reg-logos li { margin: 0; }

.pp-reg-logos a {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-md);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color .2s, box-shadow .2s;
  text-decoration: none;
}

.pp-reg-logos a:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(26, 54, 93, .08);
}

.pp-reg-logos img {
  height: 40px;
  width: auto;
  max-width: 140px;
  object-fit: contain;
}

.pp-reg-note {
  max-width: 720px;
  margin: var(--spacing-lg) auto 0;
  text-align: center;
  font-size: .82rem;
  color: var(--color-text);
  opacity: .85;
  line-height: 1.55;
}

.site-footer {
  background: var(--color-primary);
  color: #fff;
  padding: var(--spacing-xl) 0;
  margin-top: 0;
  font-size: .88rem;
}

.site-footer a { color: rgba(255,255,255,.85); }

.footer-note {
  background: rgba(0,0,0,.2);
  border-left: 3px solid var(--color-warning);
  padding: var(--spacing-md);
  border-radius: 4px;
  margin-bottom: var(--spacing-lg);
  line-height: 1.7;
}

@media (max-width: 900px) {
  .content-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .platform-hero { grid-template-columns: 1fr; }
  .pros-cons { grid-template-columns: 1fr; }
  .nav-toggle-btn {
    display: inline-flex;
    margin-left: auto;
  }
  .site-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: .25rem;
    padding-top: var(--spacing-sm);
  }
  .site-nav a {
    display: block;
    width: 100%;
    padding: .8rem 0;
  }
  .nav-toggle:checked + .nav-toggle-btn .nav-toggle-icon {
    background: transparent;
  }
  .nav-toggle:checked + .nav-toggle-btn .nav-toggle-icon::before {
    transform: translateY(6px) rotate(45deg);
  }
  .nav-toggle:checked + .nav-toggle-btn .nav-toggle-icon::after {
    transform: translateY(-6px) rotate(-45deg);
  }
  .nav-toggle:checked ~ .site-nav {
    display: flex;
  }
}