/* Research Hub styles */

/* tab navigation in topbar already styled — make active state use page state */

/* Section: Research Hub */
.research-section {
  margin-top: 36px;
}

.research-head {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 32px;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
  align-items: end;
}
.research-head h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(40px, 4.5vw, 64px);
  line-height: 1;
  letter-spacing: -.025em;
  margin: 0 0 12px;
}
.research-head h2 em { color: var(--green); font-style: italic; }
.research-head .sub {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 12px;
}
.research-head p {
  font-size: 16px;
  color: var(--ink-soft);
  max-width: 520px;
  margin: 0 0 20px;
}
.research-head .stat-row {
  display: flex; gap: 28px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
}
.research-head .stat-row b {
  display: block;
  font-family: var(--font-display);
  font-size: 32px;
  color: var(--ink);
  letter-spacing: -.01em;
  margin-top: 4px;
  text-transform: none;
}

/* Filter bar */
.research-filters {
  display: flex; gap: 8px;
  margin-bottom: 18px;
  flex-wrap: wrap;
  align-items: center;
}
.research-filters .chip {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 6px 12px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink-soft);
  cursor: pointer;
  border-radius: 99px;
  transition: all .12s ease;
}
.research-filters .chip:hover { background: var(--bg-warm); }
.research-filters .chip.active {
  background: var(--green); color: #fff; border-color: var(--green);
}
.research-filters .sep {
  width: 1px; height: 16px; background: var(--line); margin: 0 6px;
}

/* Research card grid */
.research-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}
@media (max-width: 1100px) { .research-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 720px)  { .research-grid { grid-template-columns: 1fr; } }

.r-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 20px 22px 18px;
  cursor: pointer;
  position: relative;
  display: flex; flex-direction: column;
  min-height: 220px;
  transition: transform .15s ease, box-shadow .15s ease;
  overflow: hidden;
}
.r-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 40px rgba(40,30,10,.08);
}
.r-card .r-meta {
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 14px;
}
.r-card .r-tier {
  padding: 3px 8px;
  border-radius: 99px;
  font-weight: 700;
  letter-spacing: .14em;
  font-size: 9px;
}
.r-card .r-tier.free  { background: #ece5d2; color: #6a614c; }
.r-card .r-tier.plus  { background: #d8e5dc; color: var(--green); }
.r-card .r-tier.pro   { background: #f0dccb; color: var(--warm); }
.r-card .r-tier.inst  { background: #ece1c2; color: var(--gold); }

.r-card h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 22px;
  line-height: 1.15;
  letter-spacing: -.01em;
  margin: 0 0 10px;
  color: var(--ink);
}
.r-card .r-sum {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.5;
  flex: 1;
  margin-bottom: 14px;
}
.r-card .r-foot {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .08em;
  color: var(--muted);
  text-transform: uppercase;
}
.r-card .r-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.r-card .r-tag { color: var(--ink-soft); }

.r-card.locked::after {
  content: "🔒";
  position: absolute;
  top: 14px; right: 14px;
  font-size: 14px;
  opacity: .35;
}
.r-card.locked .r-sum {
  position: relative;
}
.r-card.locked .r-sum::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 30%, var(--paper) 100%);
  pointer-events: none;
}

/* Pricing tiers */
.pricing {
  margin-top: 24px;
  padding: 28px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.pricing h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 32px;
  letter-spacing: -.01em;
  margin: 0 0 6px;
}
.pricing .lead {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 24px;
}
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-left: 1px solid var(--line);
}
@media (max-width: 1100px) {
  .pricing-grid { grid-template-columns: 1fr 1fr; border-left: none; }
}
@media (max-width: 600px) {
  .pricing-grid { grid-template-columns: 1fr; }
}

.tier {
  padding: 22px 22px 26px;
  border-right: 1px solid var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  display: flex; flex-direction: column;
  background: var(--paper);
  position: relative;
  cursor: pointer;
  transition: background .12s ease;
}
.tier:hover { background: #fdfaf2; }
.tier.popular {
  background: #fdfbf3;
  box-shadow: inset 0 3px 0 var(--green);
}
.tier.current {
  background: var(--green-soft);
  box-shadow: inset 0 3px 0 var(--green), inset 0 -3px 0 var(--green);
}
.tier .badge {
  position: absolute;
  top: -10px; left: 22px;
  background: var(--green); color: #fff;
  padding: 3px 10px;
  border-radius: 99px;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: .16em;
  text-transform: uppercase;
  font-weight: 700;
}
.tier .badge.cur { background: var(--gold); }
.tier .t-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 26px;
  margin: 0 0 4px;
  letter-spacing: -.01em;
}
.tier .t-price {
  font-family: var(--font-display);
  font-size: 44px;
  font-weight: 500;
  margin: 4px 0;
  font-variant-numeric: tabular-nums;
  letter-spacing: -.02em;
}
.tier .t-price small {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-left: 6px;
  font-weight: 400;
}
.tier .t-desc {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.5;
  margin: 8px 0 18px;
  min-height: 60px;
}
.tier .t-perks {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
  font-size: 13px;
  flex: 1;
}
.tier .t-perks li {
  padding: 6px 0 6px 20px;
  position: relative;
  border-bottom: 1px solid var(--line-soft);
  color: var(--ink-soft);
}
.tier .t-perks li:last-child { border-bottom: none; }
.tier .t-perks li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--green);
  font-family: var(--font-mono);
}
.tier .t-cta {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  cursor: pointer;
  font-weight: 600;
  border-radius: 2px;
  transition: all .12s ease;
}
.tier .t-cta:hover { background: var(--green); border-color: var(--green); }
.tier.popular .t-cta { background: var(--green); border-color: var(--green); }
.tier.current .t-cta {
  background: transparent;
  color: var(--green);
  border-color: var(--green);
  cursor: default;
}

/* Reading view (modal) */
.reader-overlay {
  position: fixed;
  inset: 0;
  background: rgba(20, 16, 8, .55);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 60px 24px;
  overflow: auto;
  animation: fadeIn .2s ease;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.reader {
  background: var(--paper);
  max-width: 760px;
  width: 100%;
  border-radius: 6px;
  padding: 0;
  box-shadow: 0 30px 80px rgba(0,0,0,.3);
  position: relative;
  border: 1px solid var(--line);
}
.reader-head {
  padding: 30px 40px 20px;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: var(--paper);
  border-top-left-radius: 6px;
  border-top-right-radius: 6px;
  z-index: 2;
}
.reader-close {
  position: absolute;
  top: 16px; right: 16px;
  width: 32px; height: 32px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--paper);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--muted);
}
.reader-close:hover { background: var(--bg-warm); color: var(--ink); }
.reader-head .r-meta {
  display: flex; gap: 14px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
  align-items: center;
}
.reader-head h1 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 34px;
  line-height: 1.1;
  letter-spacing: -.02em;
  margin: 0 0 8px;
  padding-right: 40px;
}
.reader-head .author {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: .08em;
}
.reader-body {
  padding: 24px 40px 40px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}
.reader-body h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 26px;
  letter-spacing: -.01em;
  margin: 28px 0 10px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 6px;
}
.reader-body h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 20px;
  margin: 22px 0 8px;
}
.reader-body p { margin: 0 0 14px; color: var(--ink-soft); }
.reader-body ul, .reader-body ol { padding-left: 22px; }
.reader-body li { margin-bottom: 6px; color: var(--ink-soft); }
.reader-body strong { color: var(--ink); }
.reader-body em { font-style: italic; color: var(--green); font-family: var(--font-display); font-size: 1.05em; }
.reader-body code {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--bg-warm);
  padding: 1px 5px;
  border-radius: 2px;
}
.reader-body table.md-table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0 20px;
  font-size: 13px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 3px;
  overflow: hidden;
}
.reader-body table.md-table th {
  background: var(--bg-warm);
  text-align: left;
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink);
  font-weight: 600;
  border-bottom: 1px solid var(--line);
}
.reader-body table.md-table td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--line-soft);
}
.reader-body table.md-table tr:last-child td { border-bottom: none; }

/* Paywall block inside reader */
.paywall {
  margin: 24px 0 0;
  padding: 28px 32px;
  background: linear-gradient(180deg, var(--paper) 0%, var(--green-soft) 100%);
  border: 1px solid var(--green);
  border-radius: 4px;
  text-align: center;
}
.paywall.warm {
  background: linear-gradient(180deg, var(--paper) 0%, var(--warm-soft) 100%);
  border-color: var(--warm);
}
.paywall.gold {
  background: linear-gradient(180deg, var(--paper) 0%, #f0e4c4 100%);
  border-color: var(--gold);
}
.paywall .lock-ico {
  font-size: 28px;
  margin-bottom: 10px;
}
.paywall h4 {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 500;
  letter-spacing: -.01em;
  margin: 0 0 8px;
}
.paywall p {
  color: var(--ink-soft);
  margin: 0 0 18px;
  font-size: 14px;
  max-width: 460px;
  margin-left: auto;
  margin-right: auto;
}
.paywall .pw-cta {
  display: inline-flex;
  gap: 8px;
  padding: 12px 22px;
  background: var(--green);
  color: #fff;
  border: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  font-weight: 600;
  cursor: pointer;
  border-radius: 2px;
}
.paywall.warm .pw-cta { background: var(--warm); }
.paywall.gold .pw-cta { background: var(--gold); }
.paywall .pw-cta:hover { opacity: .9; }
.paywall .pw-skip {
  display: block;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
  color: var(--muted);
  text-transform: uppercase;
  background: none;
  border: none;
  cursor: pointer;
}
.paywall .pw-skip:hover { color: var(--ink); }

/* Loading skeleton */
.reader-loading {
  padding: 80px 40px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
}
.reader-loading::before {
  content: "";
  display: inline-block;
  width: 12px; height: 12px;
  border: 2px solid var(--line);
  border-top-color: var(--green);
  border-radius: 50%;
  animation: spin .8s linear infinite;
  margin-right: 10px;
  vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Account chip in topbar */
.account-chip {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .14em;
  text-transform: uppercase;
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 99px;
  cursor: pointer;
  background: var(--paper);
  color: var(--ink-soft);
  display: flex;
  gap: 6px;
  align-items: center;
}
.account-chip:hover { border-color: var(--green); color: var(--green); }
.account-chip .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--muted);
}
.account-chip.free .dot  { background: #8a8275; }
.account-chip.plus .dot  { background: var(--green); }
.account-chip.pro  .dot  { background: var(--warm); }
.account-chip.inst .dot  { background: var(--gold); }

/* Section toggle (atlas / research) — pages */
.atlas-page, .research-page {
  animation: pageFade .25s ease;
}
@keyframes pageFade {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}