/* ==========================================================================
   YANA TECHNICAL WHITEPAPER / PROJECT REPORT 2026
   Clean White Aesthetic: Pure clean white theme matching Yana standard pages
   ========================================================================== */

:root {
  --wp-canvas: #ffffff;
  --wp-canvas-alt: #f5f5f7;
  --wp-card: #ffffff;
  --wp-border: #e6e6e9;
  --wp-border-highlight: #0284c7;
  --wp-ink: #1d1d1f;
  --wp-ink-soft: #48484a;
  --wp-ink-muted: #626269;
  --wp-ink-dim: #86868b;
  --wp-primary: #0284c7;
  --wp-primary-hover: #0369a1;
  --wp-primary-soft: #f0f9ff;
  --wp-emerald: #10b981;
  --wp-emerald-soft: #ecfdf5;
  --wp-rose: #e11d48;
  --wp-rose-soft: #fff1f2;
  --wp-amber: #d97706;
  --wp-amber-soft: #fffbeb;
  --wp-font-sans: "Nunito", -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  --wp-font-display: "Nunito", -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif;
  --wp-font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

body.sakura-site.whitepaper-page,
body.sakura-site.whitepaper-page main {
  background: var(--wp-canvas) !important;
  color: var(--wp-ink) !important;
  font-family: var(--wp-font-sans);
  line-height: 1.7;
}

/* Nav adjustments for whitepaper page */
body.whitepaper-page .site-nav {
  background: rgba(255, 255, 255, 0.9) !important;
  border-bottom: 1px solid #e9e9ec !important;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04) !important;
  backdrop-filter: blur(20px) !important;
  -webkit-backdrop-filter: blur(20px) !important;
}

/* Container */
.wp-container {
  position: relative;
  z-index: 1;
  width: min(100% - 32px, 1140px);
  margin: 0 auto;
  padding: 40px 0 100px;
}

/* Header & Meta */
.wp-header {
  padding: 20px 0 32px;
  border-bottom: 1px solid var(--wp-border);
  margin-bottom: 40px;
}

.wp-badge-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

.wp-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--wp-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 999px;
  font-weight: 700;
}

.wp-badge--primary {
  background: var(--wp-primary-soft);
  color: var(--wp-primary);
  border: 1px solid rgba(2, 132, 199, 0.25);
}

.wp-badge--accent {
  background: var(--wp-emerald-soft);
  color: #047857;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.wp-badge--tag {
  background: var(--wp-canvas-alt);
  color: var(--wp-ink-soft);
  border: 1px solid var(--wp-border);
}

.wp-title {
  font-family: var(--wp-font-display);
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 850;
  line-height: 1.15;
  letter-spacing: -0.035em;
  color: var(--wp-ink);
  margin: 0 0 14px;
}

.wp-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  color: var(--wp-ink-muted);
  font-weight: 600;
  margin: 0 0 28px;
  line-height: 1.45;
}

.wp-meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px 24px;
  padding: 22px 26px;
  background: var(--wp-canvas-alt);
  border: 1px solid var(--wp-border);
  border-radius: 18px;
}

.wp-meta-item dt {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--wp-ink-dim);
  margin-bottom: 4px;
  font-weight: 700;
}

.wp-meta-item dd {
  margin: 0;
  font-size: 0.95rem;
  color: var(--wp-ink);
  font-weight: 650;
}

.wp-meta-item dd a {
  color: var(--wp-primary);
  text-decoration: none;
}
.wp-meta-item dd a:hover {
  text-decoration: underline;
}

/* Action Bar: Download PDF & Language Switcher */
.wp-action-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 24px;
  margin-bottom: 32px;
  background: #ffffff;
  border: 1px solid var(--wp-border);
  border-radius: 18px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.wp-btn-download {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #17181c;
  color: #ffffff !important;
  font-weight: 750;
  font-size: 0.92rem;
  padding: 12px 24px;
  border-radius: 999px;
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(23, 24, 28, 0.2);
  transition: all 0.25s cubic-bezier(0.2, 0.9, 0.3, 1.2);
}

.wp-btn-download:hover {
  background: #2a2c33;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(23, 24, 28, 0.3);
}

.wp-btn-download svg {
  width: 18px;
  height: 18px;
}

.wp-lang-nav {
  display: inline-flex;
  align-items: center;
  background: var(--wp-canvas-alt);
  border: 1px solid var(--wp-border);
  border-radius: 999px;
  padding: 4px;
}

.wp-lang-nav a {
  padding: 6px 16px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--wp-ink-muted);
  text-decoration: none;
  border-radius: 999px;
  transition: all 0.2s;
}

.wp-lang-nav a.is-active {
  background: #ffffff;
  color: var(--wp-ink);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* Abstract Box */
.wp-abstract {
  background: #fbfbfc;
  border-left: 4px solid var(--wp-primary);
  border: 1px solid var(--wp-border);
  border-left: 4px solid var(--wp-primary);
  border-radius: 0 20px 20px 0;
  padding: 28px 32px;
  margin-bottom: 48px;
  box-shadow: 0 8px 24px rgba(20, 20, 24, 0.04);
}

.wp-abstract-title {
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--wp-primary);
  margin: 0 0 12px;
}

.wp-abstract p {
  color: var(--wp-ink-soft);
  font-size: 1.05rem;
  line-height: 1.8;
  margin: 0 0 14px;
}

.wp-abstract p:last-child {
  margin: 0;
}

.wp-keywords {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  font-size: 0.88rem;
  color: var(--wp-ink-dim);
}

.wp-keywords strong {
  color: var(--wp-ink-soft);
}

/* Whitepaper Section */
.wp-section {
  margin-bottom: 56px;
  scroll-margin-top: 100px;
}

.wp-sec-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--wp-font-display);
  font-size: clamp(1.6rem, 3.2vw, 2.1rem);
  font-weight: 800;
  color: var(--wp-ink);
  letter-spacing: -0.025em;
  margin: 0 0 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--wp-border);
}

.wp-sec-title .wp-sec-num {
  color: var(--wp-primary);
  font-family: var(--wp-font-mono);
  font-weight: 700;
  font-size: 1.25rem;
}

.wp-subsec-title {
  font-size: 1.3rem;
  font-weight: 750;
  color: var(--wp-ink);
  margin: 28px 0 14px;
}

.wp-prose p {
  color: var(--wp-ink-soft);
  font-size: 1.02rem;
  line-height: 1.8;
  margin: 0 0 18px;
}

.wp-prose ul, .wp-prose ol {
  color: var(--wp-ink-soft);
  padding-left: 24px;
  margin: 0 0 20px;
}

.wp-prose li {
  margin-bottom: 10px;
  line-height: 1.7;
}

.wp-prose strong {
  color: var(--wp-ink);
  font-weight: 700;
}

/* 5-Step Pipeline Card */
.wp-pipeline-card {
  background: var(--wp-canvas-alt);
  border: 1px solid var(--wp-border);
  border-radius: 22px;
  padding: 28px;
  margin: 30px 0;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.04);
}

.wp-pipeline-flow {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}

.wp-step-box {
  background: #ffffff;
  border: 1px solid var(--wp-border);
  border-radius: 16px;
  padding: 18px 14px;
  text-align: center;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
}

.wp-step-box:hover {
  transform: translateY(-2px);
  border-color: var(--wp-primary);
  box-shadow: 0 8px 20px rgba(2, 132, 199, 0.12);
}

.wp-step-num {
  font-family: var(--wp-font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--wp-primary);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.wp-step-name {
  font-weight: 800;
  font-size: 1rem;
  color: var(--wp-ink);
  margin-bottom: 4px;
}

.wp-step-desc {
  font-size: 0.82rem;
  color: var(--wp-ink-muted);
  line-height: 1.4;
}

.wp-ledger-box {
  display: flex;
  align-items: center;
  gap: 14px;
  background: #f0fdf4;
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: 14px;
  padding: 16px 20px;
  color: #065f46;
  font-size: 0.9rem;
}

.wp-ledger-box svg {
  flex-shrink: 0;
  color: #10b981;
}

/* Code Blocks */
.wp-code-block {
  background: #17181c;
  border-radius: 16px;
  padding: 20px 24px;
  margin: 24px 0;
  overflow-x: auto;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.1);
}

.wp-code-block pre {
  margin: 0;
  font-family: var(--wp-font-mono);
  font-size: 0.88rem;
  line-height: 1.65;
  color: #f1f5f9;
}

.wp-code-block code {
  font-family: inherit;
}

.wp-code-block .c-comment { color: #94a3b8; font-style: italic; }
.wp-code-block .c-cmd { color: #38bdf8; font-weight: 700; }
.wp-code-block .c-arg { color: #f472b6; }
.wp-code-block .c-tree { color: #60a5fa; }

/* Data Tables */
.wp-table-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 26px 0;
  border: 1px solid var(--wp-border);
  border-radius: 18px;
  background: #ffffff;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.04);
}

.wp-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
}

.wp-table th {
  background: #f8fafc;
  color: var(--wp-ink);
  font-weight: 800;
  padding: 16px 20px;
  border-bottom: 1px solid var(--wp-border);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.wp-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--wp-border);
  color: var(--wp-ink-soft);
  vertical-align: top;
}

.wp-table tr:last-child td {
  border-bottom: none;
}

.wp-table tr:hover td {
  background: #f8fafc;
}

.wp-badge-verdict {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  font-family: var(--wp-font-mono);
}

.wp-badge-verdict--blocked {
  background: var(--wp-rose-soft);
  color: var(--wp-rose);
  border: 1px solid rgba(225, 29, 72, 0.2);
}

.wp-badge-verdict--allowed {
  background: var(--wp-emerald-soft);
  color: #047857;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.wp-badge-status {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  font-family: var(--wp-font-mono);
}

.wp-badge-status--prod {
  background: var(--wp-emerald-soft);
  color: #047857;
}

.wp-badge-status--dev {
  background: var(--wp-amber-soft);
  color: #b45309;
}

.wp-badge-status--pre {
  background: #f1f5f9;
  color: #475569;
}

.wp-badge-status--exp {
  background: var(--wp-rose-soft);
  color: var(--wp-rose);
}

/* Founder's Quote Card */
.wp-quote-card {
  background: #f8fafc;
  border: 1px solid var(--wp-border);
  border-left: 4px solid #17181c;
  border-radius: 20px;
  padding: 36px;
  margin: 36px 0;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.04);
}

.wp-quote-card blockquote {
  margin: 0 0 20px;
  font-size: 1.15rem;
  line-height: 1.75;
  font-style: italic;
  color: var(--wp-ink);
}

.wp-quote-author {
  font-family: var(--wp-font-display);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--wp-ink);
  text-align: right;
}

.wp-quote-author small {
  display: block;
  font-size: 0.85rem;
  color: var(--wp-ink-dim);
  font-weight: 500;
}

/* Timeline */
.wp-timeline {
  display: grid;
  gap: 14px;
  margin: 24px 0;
}

.wp-timeline-item {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 20px;
  padding: 18px 22px;
  background: var(--wp-canvas-alt);
  border: 1px solid var(--wp-border);
  border-radius: 16px;
  transition: transform 0.2s;
}

.wp-timeline-item:hover {
  transform: translateX(4px);
  border-color: var(--wp-primary);
  background: #ffffff;
}

.wp-timeline-phase {
  font-weight: 800;
  color: var(--wp-primary);
  font-size: 0.98rem;
}

.wp-timeline-phase small {
  display: block;
  font-size: 0.75rem;
  color: var(--wp-ink-dim);
  font-weight: 600;
  margin-top: 4px;
}

.wp-timeline-content {
  color: var(--wp-ink-soft);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* References List */
.wp-references {
  list-style: decimal;
  padding-left: 24px;
  color: var(--wp-ink-muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

.wp-references li {
  margin-bottom: 12px;
}

.wp-references a {
  color: var(--wp-primary);
  text-decoration: none;
}
.wp-references a:hover {
  text-decoration: underline;
}

@media (max-width: 768px) {
  .wp-action-bar {
    flex-direction: column;
    align-items: stretch;
  }
  .wp-btn-download {
    justify-content: center;
  }
  .wp-lang-nav {
    justify-content: center;
  }
  .wp-timeline-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .wp-quote-card {
    padding: 24px;
  }
  .wp-pipeline-card {
    padding: 20px;
  }
}

/* Figures & Diagrams from Report */
.wp-figure {
  margin: 32px 0;
  background: var(--wp-canvas-alt);
  border: 1px solid var(--wp-border);
  border-radius: 14px;
  padding: 16px;
  text-align: center;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.04);
}

.wp-figure img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  display: block;
  margin: 0 auto;
  border: 1px solid var(--wp-border);
  background: #ffffff;
}

.wp-figure-caption {
  margin-top: 12px;
  font-size: 0.88rem;
  color: var(--wp-ink-soft);
  font-style: italic;
  line-height: 1.5;
  text-align: center;
}

.wp-figure-caption strong {
  color: var(--wp-ink);
  font-style: normal;
}