/* ════════════════════════════════════════════════════════════════
   research-library.css
   Light2Path — Research Library
   All design tokens imported from tokens.css.
   No hardcoded colour or font values in this file.
   To change theme: edit tokens.css only.
   v1.1 — April 2026
════════════════════════════════════════════════════════════════ */

@import url('../engine/tokens.css');

/* ── RESEARCH-SPECIFIC BADGE TOKENS (light-safe) ── */
:root {
  --blue2: rgba(26,111,168,.08);

  --badge-published-bg:     rgba(0,122,88,.07);
  --badge-published-border: rgba(0,122,88,.22);
  --badge-published-text:   #005c42;

  --badge-pending-bg:       rgba(160,100,0,.07);
  --badge-pending-border:   rgba(160,100,0,.2);
  --badge-pending-text:     #7a4c00;

  --badge-draft-bg:         rgba(20,24,28,.04);
  --badge-draft-border:     rgba(20,24,28,.10);
  --badge-draft-text:       #6b7280;
}

/* ════════════════════════════════════════════════════════════════
   research-library.css
   Light2Path — Research Library
   Mirrors episode-library.css exactly.
   Only research-specific additions appended at the bottom.
   v1.0 — April 2026
════════════════════════════════════════════════════════════════ */

/* ── DESIGN TOKENS — identical to episode-library.css ────────── */
/* ── RESET + BASE ────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── MASTHEAD ────────────────────────────────────────────────── */
.lib-masthead {
  border-bottom: 1px solid var(--border);
  padding: 20px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--bg);
}
.lib-series-label {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 3px;
}
.lib-heading {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -.01em;
}
.lib-mast-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.lib-count {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text3);
}

/* ── LAYOUT ──────────────────────────────────────────────────── */
.lib-body {
  max-width: 940px;
  margin: 0 auto;
  padding: 40px 32px 80px;
}

/* ── SECTION LABEL ───────────────────────────────────────────── */
.lib-section-label {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text3);
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

/* ── GRID ────────────────────────────────────────────────────── */
.lib-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(420px, 1fr));
  gap: 12px;
  margin-bottom: 48px;
}

/* ── CARD ────────────────────────────────────────────────────── */
.ep-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px 22px;
  cursor: pointer;
  text-decoration: none;
  display: block;
  transition: border-color .15s, background .15s, transform .12s;
  position: relative;
  overflow: hidden;
  animation: fadeUp .25s ease both;
}
.ep-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,122,88,.04) 0%, transparent 60%);
  opacity: 0;
  transition: opacity .2s;
  pointer-events: none;
}
.ep-card:hover { border-color: var(--border2); background: var(--bg3); transform: translateY(-1px); }
.ep-card:hover::before { opacity: 1; }
.ep-card:active { transform: translateY(0); }

/* ── CARD TOP ROW ────────────────────────────────────────────── */
.ep-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
.ep-card-id {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--teal);
  background: var(--teal2);
  border: 1px solid rgba(0,158,115,.2);
  border-radius: 4px;
  padding: 2px 7px;
  flex-shrink: 0;
  line-height: 1.6;
}

/* ── STATUS BADGE ────────────────────────────────────────────── */
.ep-status-badge {
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: .07em;
  text-transform: uppercase;
  border-radius: 3px;
  padding: 2px 7px;
  flex-shrink: 0;
  border: 1px solid;
}
.ep-status-badge--published {
  background: var(--badge-published-bg);
  border-color: var(--badge-published-border);
  color: var(--badge-published-text);
}
.ep-status-badge--pending {
  background: var(--badge-pending-bg);
  border-color: var(--badge-pending-border);
  color: var(--badge-pending-text);
}
.ep-status-badge--draft {
  background: var(--badge-draft-bg);
  border-color: var(--badge-draft-border);
  color: var(--badge-draft-text);
}

/* ── CARD TITLES ─────────────────────────────────────────────── */
.ep-card-title {
  font-size: 13px;
  font-weight: 500;
  color: var(--text2);
  line-height: 1.45;
  margin-bottom: 2px;
}
.ep-card-title-em {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 10px;
  letter-spacing: -.01em;
}

/* ── ABSTRACT PREVIEW ────────────────────────────────────────── */
.ep-abstract {
  font-size: 12px;
  color: var(--text2);
  line-height: 1.65;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ── PILLS ───────────────────────────────────────────────────── */
.ep-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-bottom: 16px;
}
.ep-pill {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .04em;
  border-radius: 3px;
  padding: 2px 7px;
  white-space: nowrap;
}
.ep-pill-type {
  background: var(--blue2);
  color: var(--blue);
  border: 1px solid rgba(26,111,168,.18);
}
.ep-pill-topic {
  background: rgba(230,159,0,.08);
  color: var(--orange);
  border: 1px solid rgba(230,159,0,.18);
}
.ep-pill-default {
  background: var(--bg3);
  color: var(--text3);
  border: 1px solid var(--border);
}

/* ── CARD FOOTER ─────────────────────────────────────────────── */
.ep-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}
.ep-open-btn {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--teal);
  display: flex;
  align-items: center;
  gap: 5px;
  transition: gap .15s;
}
.ep-card:hover .ep-open-btn { gap: 8px; }
.ep-footer-right {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  min-width: 0;
}
.ep-date {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text3);
  white-space: nowrap;
}

/* ── TOOLTIP SYSTEM — identical to episode-library.css ───────── */
.ep-tooltip-wrap { position: relative; }
.ep-tooltip-wrap::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 6px);
  right: 0;
  width: 220px;
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: 5px;
  padding: 7px 10px;
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0;
  text-transform: none;
  color: var(--text2);
  line-height: 1.5;
  pointer-events: none;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity .15s, transform .15s;
  z-index: 10;
  white-space: normal;
}
.ep-tooltip-wrap:hover::after { opacity: 1; transform: translateY(0); }

/* ── FILTER ROW ──────────────────────────────────────────────── */
.lib-filters {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.lib-filter-btn {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text3);
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 10px;
  cursor: pointer;
  transition: color .12s, border-color .12s, background .12s;
}
.lib-filter-btn:hover,
.lib-filter-btn.active {
  color: var(--text);
  border-color: var(--border2);
  background: var(--bg3);
}
.lib-filter-btn.active {
  color: var(--teal);
  border-color: rgba(0,158,115,.3);
  background: var(--teal2);
}

/* ── LOADING / ERROR STATES ──────────────────────────────────── */
.lib-status {
  text-align: center;
  padding: 80px 32px;
  color: var(--text3);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
}
.lib-status.error { color: var(--verm); }
.lib-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border2);
  border-top-color: var(--teal);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  margin: 0 auto 16px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── ENTER ANIMATION ─────────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── RESPONSIVE ──────────────────────────────────────────────── */
@media (max-width: 600px) {
  .lib-masthead { padding: 16px 18px; }
  .lib-body     { padding: 28px 18px 60px; }
  .lib-grid     { grid-template-columns: 1fr; }
  .lib-heading  { font-size: 13px; }
}