/* I-S3 cyber security whitepaper — Apple-inspired calm layout */
:root {
  --i3wp-bg: #f5f5f7;
  --i3wp-surface: #ffffff;
  --i3wp-text: #1d1d1f;
  --i3wp-muted: #6e6e73;
  --i3wp-accent: #0071e3;
  --i3wp-green: #2f7a4d;
  --i3wp-green-soft: #eaf7ef;
  --i3wp-border: rgba(0, 0, 0, 0.08);
  --i3wp-radius: 18px;
  --i3wp-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
  --i3wp-max: 980px;
  --i3wp-font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", "Hiragino Sans", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
}

.i3wp-page {
  margin: 0;
  font-family: var(--i3wp-font);
  background: var(--i3wp-bg);
  color: var(--i3wp-text);
  line-height: 1.75;
  font-size: 1.05rem;
  -webkit-font-smoothing: antialiased;
}

.i3wp-hero {
  padding: clamp(3rem, 8vw, 5.5rem) 1.25rem clamp(2.5rem, 6vw, 4rem);
  background: linear-gradient(180deg, #fff 0%, var(--i3wp-green-soft) 55%, var(--i3wp-bg) 100%);
  text-align: center;
}

.i3wp-hero__inner { max-width: 820px; margin: 0 auto; }

.i3wp-breadcrumb {
  font-size: 0.82rem;
  color: var(--i3wp-muted);
  margin-bottom: 1.25rem;
  text-align: left;
}

.i3wp-breadcrumb a { color: var(--i3wp-accent); text-decoration: none; }

.i3wp-hero h1 {
  font-size: clamp(1.75rem, 4.5vw, 2.65rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin: 0 0 1rem;
}

.i3wp-hero__lead {
  font-size: clamp(1rem, 2.2vw, 1.2rem);
  color: var(--i3wp-muted);
  max-width: 680px;
  margin: 0 auto 1.5rem;
}

.i3wp-hero__meta {
  font-size: 0.85rem;
  color: var(--i3wp-muted);
  margin-bottom: 1.5rem;
}

.i3wp-kw-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin: 1.5rem 0;
}

.i3wp-kw {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  background: var(--i3wp-surface);
  border: 1px solid var(--i3wp-border);
  color: var(--i3wp-green);
}

.i3wp-btn {
  display: inline-block;
  padding: 0.65rem 1.35rem;
  border-radius: 999px;
  background: var(--i3wp-green);
  color: #fff !important;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: opacity 0.2s;
}

.i3wp-btn:hover { opacity: 0.88; }

.i3wp-btn--ghost {
  background: transparent;
  color: var(--i3wp-accent) !important;
  border: 1px solid var(--i3wp-border);
  margin-left: 0.5rem;
}

.i3wp-main {
  max-width: var(--i3wp-max);
  margin: 0 auto;
  padding: 0 1.25rem 4rem;
}

.i3wp-section {
  background: var(--i3wp-surface);
  border-radius: var(--i3wp-radius);
  padding: clamp(1.5rem, 4vw, 2.25rem);
  margin-bottom: 1.75rem;
  box-shadow: var(--i3wp-shadow);
  border: 1px solid var(--i3wp-border);
}

.i3wp-section h2 {
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--i3wp-border);
}

.i3wp-section h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 1.5rem 0 0.65rem;
  color: var(--i3wp-text);
}

.i3wp-section p { margin: 0 0 1rem; }

.i3wp-section ul, .i3wp-section ol {
  padding-left: 1.35rem;
  margin: 0 0 1rem;
}

.i3wp-callout {
  background: var(--i3wp-green-soft);
  border-left: 4px solid var(--i3wp-green);
  border-radius: 0 12px 12px 0;
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
  font-size: 0.98rem;
}

.i3wp-callout--question {
  background: #f0f4ff;
  border-left-color: var(--i3wp-accent);
}

.i3wp-figure {
  margin: 1.5rem 0;
  text-align: center;
}

.i3wp-figure figcaption {
  font-size: 0.85rem;
  color: var(--i3wp-muted);
  margin-top: 0.65rem;
}

.i3wp-mermaid {
  background: #fafafa;
  border-radius: 12px;
  padding: 1rem;
  overflow-x: auto;
  margin: 1rem 0;
}

.i3wp-chart {
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  display: block;
}

.i3wp-table-wrap { overflow-x: auto; margin: 1.25rem 0; }

.i3wp-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.i3wp-table th,
.i3wp-table td {
  border: 1px solid var(--i3wp-border);
  padding: 0.75rem 1rem;
  text-align: left;
  vertical-align: top;
}

.i3wp-table th {
  background: #f8f8fa;
  font-weight: 600;
}

.i3wp-table td:first-child { color: var(--i3wp-muted); }

.i3wp-pillar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.75rem;
  margin: 1.25rem 0;
}

.i3wp-pillar__item {
  background: #f8f8fa;
  border-radius: 12px;
  padding: 0.85rem;
  text-align: center;
  font-size: 0.88rem;
  font-weight: 600;
  border: 1px solid var(--i3wp-border);
}

.i3wp-pillar__item--arrow::after {
  content: "↓";
  display: block;
  color: var(--i3wp-muted);
  font-weight: 400;
  margin-top: 0.35rem;
}

.i3wp-questions li {
  margin-bottom: 0.65rem;
  font-weight: 500;
}

.i3wp-manifesto {
  text-align: center;
  padding: clamp(2rem, 5vw, 3rem) 1.5rem;
  background: linear-gradient(135deg, #1d1d1f 0%, #2f4f3a 100%);
  color: #fff;
  border-radius: var(--i3wp-radius);
  margin: 2rem 0;
}

.i3wp-manifesto h2 {
  border: none;
  color: #fff;
  font-size: clamp(1.4rem, 3.5vw, 2rem);
  margin-bottom: 0.5rem;
}

.i3wp-manifesto p {
  color: rgba(255, 255, 255, 0.82);
  max-width: 560px;
  margin: 0 auto;
}

.i3wp-related {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.i3wp-related a {
  display: block;
  padding: 1rem 1.15rem;
  background: #f8f8fa;
  border-radius: 12px;
  text-decoration: none;
  color: var(--i3wp-text);
  border: 1px solid var(--i3wp-border);
  font-weight: 600;
  font-size: 0.92rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.i3wp-related a:hover {
  border-color: var(--i3wp-green);
  box-shadow: 0 4px 16px rgba(47, 122, 77, 0.12);
}

.i3wp-related a span {
  display: block;
  font-weight: 400;
  font-size: 0.82rem;
  color: var(--i3wp-muted);
  margin-top: 0.35rem;
}

.i3wp-footer {
  text-align: center;
  padding: 2rem 1rem;
  font-size: 0.85rem;
  color: var(--i3wp-muted);
}

.i3wp-footer a { color: var(--i3wp-accent); }

.i3wp-blog-page .i3wp-section { max-width: 760px; margin-left: auto; margin-right: auto; }

@media (max-width: 640px) {
  .i3wp-btn--ghost { margin-left: 0; margin-top: 0.5rem; }
  .i3wp-pillar { grid-template-columns: 1fr; }
}