/* ──────────────────────────────────────────────────────────────────────
   Helix whitepaper — interactive doc styles
   Sticky TOC scroll-spy, calc widget, tranche diagram, distribution bars.
   ────────────────────────────────────────────────────────────────────── */

.wp-body {
  background:
    radial-gradient(900px 500px at 80% -10%, rgba(58, 92, 255, .08), transparent 60%),
    var(--bg);
}

/* ── Scroll-progress bar ─────────────────────────────────────────── */
.wp-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: transparent;
  z-index: 30;
}
.wp-progress-bar {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--blue-soft), var(--red));
  transition: width .08s linear;
}

/* ── Header (slim variant for whitepaper) ────────────────────────── */
.wp-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(250, 251, 255, .9);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.wp-header-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 12px 24px;
}
.wp-header .brand-ticker {
  font-size: 10.5px;
  letter-spacing: 0.18em;
  background: var(--blue-tint);
  color: var(--blue);
}
.wp-back {
  margin-left: auto;
  font-size: 14px;
  color: var(--ink-soft);
  font-weight: 500;
}
.wp-back:hover { color: var(--blue); }

/* ── Layout: two-column (TOC + doc) ──────────────────────────────── */
.wp-shell {
  max-width: 1240px;
  margin: 0 auto;
  padding: 32px 24px 80px;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 56px;
  align-items: start;
}

/* ── Table of contents (sticky sidebar) ──────────────────────────── */
.wp-toc {
  position: sticky;
  top: 72px;
  align-self: start;
  max-height: calc(100vh - 88px);
  overflow-y: auto;
}
.wp-toc-inner {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 22px;
  box-shadow: var(--shadow-1);
}
.wp-toc-title {
  margin: 0 0 14px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--ink-mute);
  text-transform: uppercase;
}
.wp-toc ol {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: toc;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.wp-toc li {
  counter-increment: toc;
  position: relative;
}
.wp-toc a {
  display: flex;
  gap: 8px;
  padding: 7px 10px;
  border-radius: 8px;
  font-size: 13.5px;
  color: var(--ink-soft);
  position: relative;
  transition: background .12s ease, color .12s ease;
}
.wp-toc a::before {
  content: counter(toc, decimal-leading-zero);
  color: var(--ink-mute);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  flex-shrink: 0;
}
.wp-toc a:hover { background: var(--blue-tint); color: var(--blue); }
.wp-toc a.active {
  background: var(--blue);
  color: var(--white);
}
.wp-toc a.active::before { color: rgba(255, 255, 255, .7); }
.wp-toc-meta {
  margin: 16px 0 0;
  font-size: 11.5px;
  color: var(--ink-mute);
  border-top: 1px solid var(--line-soft);
  padding-top: 12px;
  letter-spacing: 0.04em;
}

/* ── Document ────────────────────────────────────────────────────── */
.wp-doc {
  max-width: 760px;
}
.wp-doc h2 {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 800;
  letter-spacing: -0.018em;
  margin: 0 0 14px;
  color: var(--blue);
}
.wp-doc h3 {
  font-size: 18.5px;
  font-weight: 700;
  margin: 32px 0 10px;
  color: var(--ink);
}
.wp-doc p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink-soft);
}
.wp-doc p strong { color: var(--ink); font-weight: 600; }
.wp-doc ul, .wp-doc ol { padding-left: 22px; margin: 8px 0 20px; }
.wp-doc li { margin: 8px 0; color: var(--ink-soft); }

.wp-section {
  padding-top: 80px;
  padding-bottom: 8px;
  scroll-margin-top: 88px;
}
.wp-section-sub {
  margin-top: -8px !important;
  font-size: 14.5px !important;
  color: var(--ink-mute) !important;
}

/* ── Cover ───────────────────────────────────────────────────────── */
.wp-cover {
  padding: 36px 0 24px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 8px;
}
.wp-eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--red);
  background: var(--red-tint);
  padding: 4px 10px;
  border-radius: 5px;
  margin-bottom: 22px;
}
.wp-cover h1 {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.04;
  margin: 0 0 18px;
  color: var(--blue);
}
.wp-cover h1 em {
  font-style: italic;
  color: var(--red);
  font-weight: 800;
}
.wp-cover-sub {
  font-size: 17.5px;
  color: var(--ink-soft);
  max-width: 620px;
  margin: 0 0 28px;
  line-height: 1.55;
}
.wp-cover-meta {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  max-width: 640px;
}
.wp-cover-meta li {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 14px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.wp-cover-meta span {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
  font-weight: 600;
}
.wp-cover-meta strong {
  font-size: 16px;
  color: var(--blue);
  letter-spacing: -0.01em;
}

/* ── Architecture layers ─────────────────────────────────────────── */
.wp-arch {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 12px 0 24px;
}
.wp-arch-layer {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 4px solid var(--blue);
  border-radius: 12px;
  padding: 18px 22px;
}
.wp-arch-layer:nth-child(2) { border-left-color: var(--red); }
.wp-arch-layer:nth-child(3) { border-left-color: var(--blue); }
.wp-arch-offchain {
  border-left-color: var(--ink-mute) !important;
  background: var(--surface-alt);
}
.wp-arch-label {
  display: block;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 4px;
}
.wp-arch-layer:nth-child(2) .wp-arch-label { color: var(--red); }
.wp-arch-offchain .wp-arch-label { color: var(--ink-mute); }
.wp-arch-layer p { margin: 4px 0 0 !important; }

/* ── Asset class buttons (clickable to load calc) ────────────────── */
.wp-asset-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 14px 0 16px;
}
.wp-asset {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px 22px 18px;
  text-align: left;
  cursor: pointer;
  font: inherit;
  color: inherit;
  transition: transform .14s ease, box-shadow .14s ease, border-color .14s ease;
}
.wp-asset:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
  border-color: var(--blue-soft);
}
.wp-asset h3 {
  font-size: 18px !important;
  margin: 8px 0 6px !important;
  color: var(--ink);
}
.wp-asset p { margin: 0 0 12px !important; font-size: 14.5px !important; }
.wp-asset-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 5px;
}
.wp-asset dl {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
}
.wp-asset dt {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-mute);
  font-weight: 600;
}
.wp-asset dd { margin: 3px 0 0; font-size: 13.5px; font-weight: 700; color: var(--blue); }

.wp-hint {
  font-size: 13.5px !important;
  color: var(--ink-mute) !important;
  font-style: italic;
}

/* ── Tokenization flow ───────────────────────────────────────────── */
.wp-flow {
  list-style: none;
  padding: 0;
  margin: 12px 0 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  counter-reset: none;
}
.wp-flow li {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 20px;
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 16px;
  align-items: start;
  margin: 0 !important;
}
.wp-flow li strong {
  display: block;
  font-size: 15px;
  color: var(--ink);
  font-weight: 700;
  margin-bottom: 2px;
}
.wp-flow li p {
  margin: 0 !important;
  font-size: 14.5px !important;
  color: var(--ink-soft) !important;
}
.wp-flow-step {
  font-size: 13px;
  font-weight: 800;
  color: var(--blue);
  letter-spacing: 0.04em;
}
.wp-flow li:nth-child(2) .wp-flow-step,
.wp-flow li:nth-child(4) .wp-flow-step { color: var(--red); }

/* ── Tranche diagram ─────────────────────────────────────────────── */
.wp-tranche-diagram {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px;
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  gap: 12px 18px;
  margin: 14px 0 24px;
  align-items: center;
}
.wp-tranche {
  border-radius: 10px;
  padding: 16px 18px;
  color: var(--white);
}
.tranche-senior {
  background: linear-gradient(135deg, var(--blue), var(--blue-deep));
}
.tranche-junior {
  background: linear-gradient(135deg, var(--red), var(--red-deep));
}
.wp-tranche-band {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.18em;
  margin-bottom: 4px;
}
.wp-tranche-meta {
  font-size: 13px;
  color: rgba(255, 255, 255, .85);
  line-height: 1.45;
}
.wp-tranche-waterfall {
  grid-row: span 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-mute);
}
.wp-tranche-arrow {
  width: 4px;
  flex: 1;
  background: linear-gradient(to bottom, var(--blue), var(--red));
  border-radius: 2px;
  position: relative;
  min-height: 80px;
}
.wp-tranche-arrow::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  border: 7px solid transparent;
  border-top-color: var(--red);
}

.wp-report-list { margin: 8px 0 20px !important; }
.wp-report-list li strong { color: var(--blue); font-weight: 700; }

/* ── Yield calculator ────────────────────────────────────────────── */
.wp-calc-section {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px 28px 32px !important;
  margin-top: 24px;
  scroll-margin-top: 88px;
}
.wp-calc-section h2 { margin-top: 0; }
.wp-calc { margin-top: 18px; }
.wp-calc-asset-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}
.wp-calc-asset {
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink-soft);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all .12s ease;
}
.wp-calc-asset:hover {
  border-color: var(--blue);
  color: var(--blue);
}
.wp-calc-asset.active {
  background: var(--blue);
  color: var(--white);
  border-color: var(--blue);
}

.wp-calc-inputs {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 20px;
  margin-bottom: 22px;
}
.wp-calc-inputs label {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.wp-calc-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-mute);
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.wp-calc-days { color: var(--blue); text-transform: none; letter-spacing: 0; }
.wp-calc-amount {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0 14px;
  transition: border-color .12s ease;
}
.wp-calc-amount:focus-within { border-color: var(--blue); }
.wp-calc-prefix { color: var(--ink-mute); font-weight: 600; }
.wp-calc-amount input {
  flex: 1;
  border: 0;
  background: transparent;
  padding: 12px 0;
  font: inherit;
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  outline: none;
  width: 100%;
}
.wp-calc-inputs input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  background: linear-gradient(to right, var(--blue), var(--red));
  border-radius: 3px;
  outline: none;
}
.wp-calc-inputs input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  background: var(--white);
  border: 2px solid var(--blue);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow-1);
}
.wp-calc-inputs input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  background: var(--white);
  border: 2px solid var(--blue);
  border-radius: 50%;
  cursor: pointer;
}

.wp-calc-output {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.wp-calc-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 18px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.wp-calc-card-mid {
  background: linear-gradient(180deg, var(--blue), var(--blue-deep));
  border-color: transparent;
  color: var(--white);
}
.wp-calc-card-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
  color: var(--ink-mute);
}
.wp-calc-card-mid .wp-calc-card-label { color: rgba(255, 255, 255, .8); }
.wp-calc-card-value {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.015em;
  font-variant-numeric: tabular-nums;
  color: var(--blue);
}
.wp-calc-card-mid .wp-calc-card-value { color: var(--white); }
.wp-calc-card-foot {
  font-size: 12px;
  color: var(--ink-mute);
}
.wp-calc-card-mid .wp-calc-card-foot { color: rgba(255, 255, 255, .75); }
.wp-calc-foot {
  margin-top: 18px;
  font-size: 12.5px !important;
  color: var(--ink-mute) !important;
  line-height: 1.55;
}

/* ── Tokenomics ──────────────────────────────────────────────────── */
.wp-tokenomics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 12px 0 24px;
}
.wp-tokenomics-stat {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 18px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.wp-tokenomics-num {
  font-size: 22px;
  font-weight: 800;
  color: var(--blue);
  letter-spacing: -0.015em;
}
.wp-tokenomics-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-mute);
  font-weight: 600;
}

/* Distribution bars */
.wp-distribution {
  list-style: none;
  padding: 0;
  margin: 12px 0 24px !important;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.wp-distribution li {
  display: grid;
  grid-template-columns: 1fr 1.4fr 50px;
  gap: 14px;
  align-items: center;
  margin: 0 !important;
}
.wp-bar {
  display: block;
  height: 10px;
  background: var(--line-soft);
  border-radius: 5px;
  overflow: hidden;
  position: relative;
  width: 100%;
}
.wp-bar-fill {
  display: block;
  height: 100%;
  width: var(--w);
  border-radius: 5px;
  transition: width 1.2s cubic-bezier(.25, .8, .25, 1);
}
.wp-bar-fill.blue { background: linear-gradient(90deg, var(--blue-soft), var(--blue)); }
.wp-bar-fill.red  { background: linear-gradient(90deg, var(--red), var(--red-deep)); }
.wp-bar-label { font-size: 14px; color: var(--ink-soft); }
.wp-bar-pct { font-size: 14px; font-weight: 700; color: var(--blue); text-align: right; font-variant-numeric: tabular-nums; }

/* ── Roadmap ─────────────────────────────────────────────────────── */
.wp-roadmap {
  list-style: none;
  padding: 0;
  margin: 12px 0 24px !important;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.wp-roadmap li {
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 3px solid var(--ink-mute);
  border-radius: 12px;
  padding: 18px 18px;
  margin: 0 !important;
  opacity: 0.65;
}
.wp-roadmap li.done {
  border-top-color: var(--blue);
  opacity: 1;
}
.wp-roadmap li.done::before {
  content: '✓';
  display: inline-flex;
  width: 18px;
  height: 18px;
  background: var(--blue);
  color: white;
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  margin-bottom: 8px;
}
.wp-roadmap li.active {
  border-top-color: var(--red);
  opacity: 1;
  box-shadow: 0 8px 24px rgba(215, 38, 56, .14);
}
.wp-roadmap li span {
  display: block;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 6px;
}
.wp-roadmap li.active span { color: var(--red); }
.wp-roadmap li h4 {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 4px;
  color: var(--ink);
  letter-spacing: -0.005em;
}
.wp-roadmap li p {
  margin: 0 !important;
  font-size: 13.5px !important;
  color: var(--ink-soft) !important;
}

.wp-disclaimer-footer {
  font-size: 12.5px !important;
  color: var(--ink-mute) !important;
  font-style: italic;
  margin-top: 28px !important;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

/* ── Responsive ─────────────────────────────────────────────────── */
@media (max-width: 980px) {
  .wp-shell {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 24px 20px 60px;
  }
  .wp-toc {
    position: static;
    top: auto;
  }
  .wp-toc ol {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 4px;
  }
  .wp-toc a { padding: 6px 12px; font-size: 12.5px; }
  .wp-toc-meta { display: none; }
  .wp-roadmap { grid-template-columns: repeat(2, 1fr); }
  .wp-tokenomics { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .wp-section { padding-top: 56px; scroll-margin-top: 64px; }
  .wp-shell { padding: 20px 14px 48px; }
  .wp-toc-inner { padding: 14px 14px; }
  .wp-cover { padding-top: 24px; }
  .wp-cover-meta { grid-template-columns: 1fr 1fr; }
  .wp-asset-grid { grid-template-columns: 1fr; }
  .wp-calc-inputs { grid-template-columns: 1fr; }
  .wp-calc-output { grid-template-columns: 1fr; }
  .wp-distribution li {
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    gap: 4px 12px;
  }
  .wp-distribution li .wp-bar { grid-column: span 2; }
  .wp-roadmap { grid-template-columns: 1fr; }
  .wp-tranche-diagram { grid-template-columns: 1fr; }
  .wp-tranche-waterfall { grid-row: auto; flex-direction: row; }
  .wp-tranche-arrow { width: 100%; height: 4px; min-height: 0; background: linear-gradient(to right, var(--blue), var(--red)); }
  .wp-tranche-arrow::after { right: -1px; bottom: 50%; left: auto; top: 50%; transform: translateY(-50%); border: 7px solid transparent; border-left-color: var(--red); border-top-color: transparent; }
}