/* ════════════════════════════════════════════════════════════════
   episode-library.css
   Growth Marketing Series — Episode Library
   Designed to match the engine's visual system exactly.

   v1.5 changes:
   - Market badge styles added (.ep-market-badge + color variants)
   - Tooltip system added (.ep-tooltip-wrap + ::after)
   - .ep-footer-right wrapper for badge + industry count alignment
   - .ep-rating-industry for industry count alongside market badge
   - All existing styles preserved — additive changes only

   v1.6 (Phase 3):
   - Search box styles added
   - Filter chips updated to match search context
   - .ep-card-question for entry question on card
   - .sr-only utility class
   - All v1.5 styles preserved — additive changes only

   v1.7 (Light Theme):
   - Full positive-polarity rewrite — dark text on light background
   - Design tokens fully replaced — all class names and structure preserved
   - Reading-optimised typography: system-ui, 16px base, line-height 1.65
   - Dark mode media query preserved as opt-in preference
   - All v1.6 styles and class names preserved — token-level changes only

   v1.9:
   - Light theme tokens inlined directly — removes @import tokens.css
     dependency which was causing fallback to dark rendering on Netlify
   - Dark mode media query removed — library is always light regardless
     of OS preference. iframe context means system dark mode was
     overriding the light default on every Mac/dark-mode device.
   - .ep-card changed from display:block to display:flex + flex-direction:column
   - .ep-card-footer gains margin-top:auto — footer always pinned to bottom
   - Fixes inconsistent gap between card content and footer
════════════════════════════════════════════════════════════════ */

/* ── DESIGN TOKENS — Light theme (inlined) ───────────────────── */
:root {
  --bg:      #fafafa;
  --bg2:     #ffffff;
  --bg3:     #f3f3f5;
  --border:  rgba(0,0,0,.08);
  --border2: rgba(0,0,0,.14);
  --text:    #111114;
  --text2:   #4a4a55;
  --text3:   #9a9aaa;
  --teal:    #007a58;
  --teal2:   rgba(0,122,88,.07);
  --orange:  #b87800;
  --verm:    #c9521f;
  --mono:    'IBM Plex Mono', monospace;
  --sans:    'DM Sans', sans-serif;

  /* market badge color tokens — light theme */
  --badge-established-bg:     rgba(0,122,88,.08);
  --badge-established-border: rgba(0,122,88,.22);
  --badge-established-text:   #007a58;

  --badge-welldoc-bg:         rgba(0,100,180,.07);
  --badge-welldoc-border:     rgba(0,100,180,.22);
  --badge-welldoc-text:       #0064b4;

  --badge-developing-bg:      rgba(184,120,0,.08);
  --badge-developing-border:  rgba(184,120,0,.22);
  --badge-developing-text:    #b87800;

  --badge-emerging-bg:        rgba(160,80,140,.08);
  --badge-emerging-border:    rgba(160,80,140,.22);
  --badge-emerging-text:      #a0508c;
}


/* ── 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: 16px;
  line-height: 1.65;
  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);
}

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

/* ── EPISODE CARD ────────────────────────────────────────────── */
.ep-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px 22px;
  cursor: pointer;
  text-decoration: none;
  display: flex;                /* v1.9 — was display:block */
  flex-direction: column;       /* v1.9 — enables sticky footer */
  transition: border-color .15s, background .15s, transform .12s;
  position: relative;
  overflow: hidden;
}

.ep-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,122,88,.03) 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(0,122,88,.18);
  border-radius: 4px;
  padding: 2px 7px;
  flex-shrink: 0;
  line-height: 1.6;
}

/* ── CONFIDENCE BADGE ────────────────────────────────────────── */
.ep-conf {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.ep-conf-bar {
  width: 40px;
  height: 3px;
  background: var(--bg3);
  border-radius: 2px;
  overflow: hidden;
}

.ep-conf-fill {
  height: 100%;
  background: var(--teal);
  border-radius: 2px;
  transition: width .4s ease;
}

.ep-conf-value {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text2);
  white-space: nowrap;
}

/* ── CARD TITLE ──────────────────────────────────────────────── */
.ep-card-title {
  font-size: 13px;
  font-weight: 400;
  color: var(--text2);
  line-height: 1.5;
  margin-bottom: 2px;
}

.ep-card-title-em {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 10px;
  letter-spacing: -.01em;
}

/* ── DISTORTION NAME ─────────────────────────────────────────── */
.ep-distortion {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: 12px;
}

/* ── 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-tier {
  background: rgba(201,82,31,.07);
  color: var(--verm);
  border: 1px solid rgba(201,82,31,.18);
}

.ep-pill-cat {
  background: rgba(184,120,0,.07);
  color: var(--orange);
  border: 1px solid rgba(184,120,0,.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);
  margin-top: auto;             /* v1.9 — pins footer to bottom of card */
}

.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;
}

/* ── LEGACY RATING LABEL (EP03-EP36) ─────────────────────────── */
.ep-rating {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text3);
}

/* ── v1.5 FOOTER RIGHT WRAPPER ───────────────────────────────── */
.ep-footer-right {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  min-width: 0;
}

/* ── v1.5 INDUSTRY COUNT (alongside market badge) ────────────── */
.ep-rating-industry {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .06em;
  color: var(--text3);
  white-space: nowrap;
}

/* ── v1.5 MARKET BADGE ───────────────────────────────────────── */
.ep-market-badge {
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  border-radius: 3px;
  padding: 2px 6px;
  white-space: nowrap;
  flex-shrink: 0;
  cursor: default;
}

.ep-market-badge--established {
  background: var(--badge-established-bg);
  border: 1px solid var(--badge-established-border);
  color: var(--badge-established-text);
}

.ep-market-badge--well-documented {
  background: var(--badge-welldoc-bg);
  border: 1px solid var(--badge-welldoc-border);
  color: var(--badge-welldoc-text);
}

.ep-market-badge--developing {
  background: var(--badge-developing-bg);
  border: 1px solid var(--badge-developing-border);
  color: var(--badge-developing-text);
}

.ep-market-badge--emerging {
  background: var(--badge-emerging-bg);
  border: 1px solid var(--badge-emerging-border);
  color: var(--badge-emerging-text);
}

/* ── v1.5 TOOLTIP SYSTEM (CSS-only, no JS) ───────────────────── */
.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(--bg2);
  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: 1.55;
  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);
}

.ep-conf.ep-tooltip-wrap::after {
  right: auto;
  left: 0;
}

/* ── COMING SOON CARD ────────────────────────────────────────── */
.ep-card-soon {
  opacity: .4;
  cursor: default;
  pointer-events: none;
}

.ep-card-soon .ep-card-id {
  color: var(--text3);
  background: transparent;
  border-color: var(--border);
}

.ep-card-soon .ep-open-btn {
  color: var(--text3);
}

/* ── 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); }
}

/* ── 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(0,122,88,.3);
  background: var(--teal2);
}

/* ── 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; }
}

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

.ep-card {
  animation: fadeUp .25s ease both;
}

/* ════════════════════════════════════════════════════════════════
   v1.6 — PHASE 3 SEARCH ADDITIONS
   All additions below. Nothing above modified.
════════════════════════════════════════════════════════════════ */

/* ── SEARCH WRAP ─────────────────────────────────────────────── */
.lib-search-wrap {
  position: relative;
  margin-bottom: 16px;
}

.lib-search-input {
  width: 100%;
  min-height: 42px;
  padding: 10px 80px 10px 14px;
  border: 1px solid var(--border2);
  border-radius: 6px;
  background: var(--bg2);
  color: var(--text);
  font-family: var(--sans);
  font-size: 14px;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}

.lib-search-input::placeholder {
  color: var(--text3);
}

.lib-search-input:focus {
  border-color: rgba(0,122,88,.4);
  box-shadow: 0 0 0 3px rgba(0,122,88,.07);
}

.lib-search-clear {
  position: absolute;
  top: 50%;
  right: 10px;
  transform: translateY(-50%);
  border: 0;
  background: transparent;
  color: var(--text2);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .06em;
  text-transform: uppercase;
  cursor: pointer;
  padding: 4px 6px;
  transition: color .12s;
}

.lib-search-clear:hover {
  color: var(--verm);
}

/* ── RESULTS META ────────────────────────────────────────────── */
.lib-results-meta {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .06em;
  color: var(--text3);
  margin-bottom: 18px;
}

/* ── ENTRY QUESTION ON CARD ──────────────────────────────────── */
.ep-card-question {
  font-size: 13px;
  color: var(--text2);
  line-height: 1.55;
  margin-bottom: 10px;
  font-style: italic;
}

/* ── EMPTY STATE ─────────────────────────────────────────────── */
.lib-empty-state {
  text-align: center;
  padding: 60px 32px;
  color: var(--text3);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
}

/* ── SCREEN READER ONLY ──────────────────────────────────────── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}