/* =========================================================
   The Replication Gap — editorial scientific notebook
   ========================================================= */

:root {
  /* Palette: warm paper + deep ink + outcome-coded accents */
  --paper:        #FBF7EC;
  --paper-deep:   #F5EFDD;
  --paper-shadow: #E8E0C9;
  --rule:         #C9C0A6;
  --rule-soft:    #E0D7BE;

  --ink:          #15192A;
  --ink-soft:     #3F4356;
  --ink-quiet:    #6B6E7E;

  --wiki-link:    #0645AD;
  --wiki-visited: #5A2DB8;

  --failed:       #9B2226;
  --failed-bg:    #F4E1DD;
  --failed-edge:  #C5605F;

  --mixed:        #8C5A14;
  --mixed-bg:     #F2E5C6;
  --mixed-edge:   #C99750;

  --successful:   #2D5039;
  --successful-bg:#DDE6D9;
  --successful-edge:#7CA088;

  --shadow-sm: 0 1px 0 rgba(21,25,42,0.04), 0 1px 2px rgba(21,25,42,0.06);
  --shadow-md: 0 1px 0 rgba(21,25,42,0.05), 0 4px 14px rgba(21,25,42,0.07);
  --shadow-lg: 0 2px 0 rgba(21,25,42,0.06), 0 12px 32px rgba(21,25,42,0.10);

  --content-max: 1180px;

  --font-display: "Fraunces", "Iowan Old Style", Georgia, serif;
  --font-body:    "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; text-rendering: optimizeLegibility; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  font-feature-settings: "ss01", "kern", "liga";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--ink);
  color: var(--paper);
}

a { color: var(--wiki-link); text-decoration: none; }
a:hover { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }

/* ===== Paper grain overlay ===== */
.grain {
  pointer-events: none;
  position: fixed; inset: 0;
  z-index: 0;
  opacity: 0.40;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.08  0 0 0 0 0.10  0 0 0 0 0.16  0 0 0 0.10 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  mix-blend-mode: multiply;
}

/* =========================================================
   Masthead
   ========================================================= */
.masthead {
  position: relative;
  padding: 56px 32px 28px;
  z-index: 1;
}
.masthead-inner {
  max-width: var(--content-max);
  margin: 0 auto;
}
.kicker {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 30px;
}
.kicker-dot {
  width: 7px; height: 7px;
  background: var(--failed);
  border-radius: 50%;
  box-shadow: 0 0 0 3px var(--failed-bg);
}

.title {
  font-family: var(--font-display);
  font-weight: 380;
  font-size: clamp(56px, 11vw, 156px);
  line-height: 0.92;
  letter-spacing: -0.025em;
  margin: 0;
  font-variation-settings: "opsz" 144, "SOFT" 30;
  color: var(--ink);
}
.title-line {
  display: block;
  animation: revealUp 900ms cubic-bezier(0.2, 0.7, 0.2, 1) backwards;
}
.title-line:nth-child(1) { animation-delay: 0.05s; }
.title-line:nth-child(2) { animation-delay: 0.20s; padding-left: 2.5ch; color: var(--failed); }
.title-line:nth-child(2) em {
  font-style: italic;
  font-variation-settings: "opsz" 144, "SOFT" 100;
}
.title-line:nth-child(3) { animation-delay: 0.35s; padding-left: 1ch; }

@keyframes revealUp {
  from { opacity: 0; transform: translateY(36px); }
  to   { opacity: 1; transform: translateY(0); }
}

.dek {
  max-width: 56ch;
  margin: 32px 0 0;
  font-family: var(--font-display);
  font-weight: 380;
  font-size: clamp(17px, 1.4vw, 21px);
  line-height: 1.5;
  color: var(--ink-soft);
  font-variation-settings: "opsz" 30, "SOFT" 30;
  animation: revealUp 900ms cubic-bezier(0.2, 0.7, 0.2, 1) 0.55s backwards;
}
.dek strong {
  color: var(--ink);
  font-weight: 600;
  font-variation-settings: "opsz" 30, "SOFT" 0;
  background: linear-gradient(180deg, transparent 62%, var(--paper-deep) 62%);
  padding: 0 2px;
}

.byline {
  margin-top: 28px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-quiet);
  animation: revealUp 900ms cubic-bezier(0.2, 0.7, 0.2, 1) 0.7s backwards;
}
.byline-link {
  color: var(--ink-soft);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: var(--rule);
}
.byline-link:hover { color: var(--ink); text-decoration-color: var(--ink); }
.byline-sep { margin: 0 10px; color: var(--rule); }

.masthead-rule {
  max-width: var(--content-max);
  margin: 56px auto 0;
  height: 0;
  border-top: 1px solid var(--ink);
  position: relative;
}
.masthead-rule::before,
.masthead-rule::after {
  content: "";
  position: absolute;
  top: 4px; left: 0;
  height: 1px;
  width: 100%;
  background: var(--ink);
}
.masthead-rule::after { top: 7px; height: 0; border-top: 1px solid var(--ink); opacity: 0; }
.masthead-rule::before { opacity: 1; }

/* =========================================================
   Controls
   ========================================================= */
.controls {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
  padding: 18px 32px 14px;
  backdrop-filter: blur(6px);
}
.controls-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(200px, 1.3fr) auto auto auto;
  gap: 26px;
  align-items: end;
}

.control-block {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.control-block-end { justify-self: end; }

.control-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-quiet);
}

#search {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 17px;
  font-variation-settings: "opsz" 18;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--ink);
  padding: 4px 0 8px;
  color: var(--ink);
  outline: none;
  width: 100%;
  min-width: 200px;
  transition: border-color 200ms;
}
#search::placeholder { color: var(--ink-quiet); font-style: italic; }
#search:focus { border-bottom-color: var(--failed); }

#sort {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  background: transparent;
  border: 1px solid var(--ink);
  padding: 7px 28px 7px 10px;
  color: var(--ink);
  border-radius: 0;
  appearance: none;
  cursor: pointer;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'><path fill='none' stroke='%2315192A' stroke-width='1.5' d='M3 5l3 3 3-3'/></svg>");
  background-repeat: no-repeat;
  background-position: right 10px center;
}

.chip-group { display: flex; gap: 6px; flex-wrap: wrap; }

.chip {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  transition: all 160ms;
  user-select: none;
}
.chip:hover { border-color: var(--ink-soft); color: var(--ink); }

.chip[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.chip-failed[aria-pressed="true"]     { background: var(--failed);     border-color: var(--failed);     color: #FCEEEC; }
.chip-mixed[aria-pressed="true"]      { background: var(--mixed);      border-color: var(--mixed);      color: #FAF1D6; }
.chip-successful[aria-pressed="true"] { background: var(--successful); border-color: var(--successful); color: #E5EEDF; }

.counters {
  max-width: var(--content-max);
  margin: 14px auto 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-quiet);
  text-transform: uppercase;
}
.counters strong {
  color: var(--ink);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}
.counters-sep { margin: 0 10px; color: var(--rule); }

/* =========================================================
   Feed
   ========================================================= */
.feed {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 24px 32px 64px;
  position: relative;
  z-index: 1;
}

.loading,
.empty {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--ink-quiet);
  text-align: center;
  padding: 64px 0;
  font-size: 18px;
}

/* ===== Card ===== */
.card {
  background: var(--paper-deep);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  padding: 0;
  margin-bottom: 24px;
  position: relative;
  overflow: hidden;
  scroll-margin-top: 140px;
  transition: transform 200ms cubic-bezier(0.2, 0.7, 0.2, 1),
              box-shadow 200ms cubic-bezier(0.2, 0.7, 0.2, 1),
              border-color 200ms;
  animation: cardIn 600ms cubic-bezier(0.2, 0.7, 0.2, 1) backwards;
}
.card:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  border-color: var(--ink-soft);
}

@keyframes cardIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.card[data-outcome="failed"]     { border-left: 4px solid var(--failed); }
.card[data-outcome="mixed"]      { border-left: 4px solid var(--mixed); }
.card[data-outcome="successful"] { border-left: 4px solid var(--successful); }

.card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding: 20px 24px 14px;
  border-bottom: 1px dashed var(--rule);
}

.card-rank {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ink-quiet);
  margin-bottom: 6px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.card-rank-num {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 17px;
  font-variation-settings: "opsz" 14;
  color: var(--ink);
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
}

.card-title {
  font-family: var(--font-display);
  font-weight: 480;
  font-size: clamp(22px, 2.4vw, 30px);
  font-variation-settings: "opsz" 36, "SOFT" 30;
  letter-spacing: -0.015em;
  line-height: 1.15;
  margin: 4px 0 8px;
  color: var(--ink);
}
.card-title a {
  color: inherit;
  text-decoration: none;
  background-image: linear-gradient(currentColor, currentColor);
  background-size: 0% 1px;
  background-repeat: no-repeat;
  background-position: 0 100%;
  transition: background-size 300ms;
  padding-bottom: 2px;
}
.card-title a:hover {
  background-size: 100% 1px;
}

.card-section-hint {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 14px;
  color: var(--ink-soft);
  font-variation-settings: "opsz" 14, "SOFT" 100;
}
.card-section-hint::before {
  content: "↳ ";
  color: var(--ink-quiet);
  font-style: normal;
}

.card-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
  flex-wrap: wrap;
  align-items: center;
}

.outcome-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 5px 10px;
  border-radius: 2px;
  border: 1px solid currentColor;
  white-space: nowrap;
}
.outcome-badge[data-outcome="failed"]     { color: var(--failed);     background: var(--failed-bg); }
.outcome-badge[data-outcome="mixed"]      { color: var(--mixed);      background: var(--mixed-bg); }
.outcome-badge[data-outcome="successful"] { color: var(--successful); background: var(--successful-bg); }

.source-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-quiet);
  border: 1px dashed var(--rule);
  padding: 5px 10px;
  border-radius: 2px;
}

.btn-edit {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 8px 14px;
  background: var(--ink);
  color: var(--paper);
  border-radius: 2px;
  border: 1px solid var(--ink);
  text-decoration: none;
  transition: transform 150ms, background 150ms;
}
.btn-edit:hover {
  background: var(--failed);
  border-color: var(--failed);
  text-decoration: none;
  transform: translate(0, -1px);
}
.btn-edit::after {
  content: "↗";
  font-size: 13px;
  margin-left: 2px;
}

/* ===== Card body: original / replication ===== */
.card-body {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 0;
  position: relative;
}

.card-body::before {
  /* connector line between original and replication */
  content: "";
  position: absolute;
  left: 50%; top: 24px; bottom: 24px;
  width: 0;
  border-left: 1px dashed var(--rule);
  transform: translateX(-50%);
}

.work {
  padding: 22px 28px;
}
.work-orig {
  background: transparent;
  opacity: 0.92;
}
.work-rep  {
  background: var(--paper);
  border-left: 1px dashed var(--rule);
  position: relative;
}
.work-rep::before {
  content: "";
  position: absolute;
  top: 0; bottom: 0; left: -1px;
  width: 2px;
  background: currentColor;
  opacity: 0.5;
}
.work-rep[data-outcome="failed"]     { color: var(--failed); }
.work-rep[data-outcome="mixed"]      { color: var(--mixed); }
.work-rep[data-outcome="successful"] { color: var(--successful); }

.work-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
}
.work-label-icon {
  width: 8px; height: 8px;
  display: inline-block;
  border-radius: 50%;
  background: var(--ink-quiet);
  flex-shrink: 0;
}
.work-orig .work-label { color: var(--ink-quiet); }
.work-rep  .work-label { color: currentColor; }
.work-rep  .work-label-icon { background: currentColor; box-shadow: 0 0 0 3px currentColor; }
.work-rep[data-outcome="failed"]     .work-label-icon { box-shadow: 0 0 0 3px var(--failed-bg); }
.work-rep[data-outcome="mixed"]      .work-label-icon { box-shadow: 0 0 0 3px var(--mixed-bg); }
.work-rep[data-outcome="successful"] .work-label-icon { box-shadow: 0 0 0 3px var(--successful-bg); }
.work-rep .work-byline,
.work-rep .work-title,
.work-rep .work-meta { color: var(--ink); }
.work-rep .work-byline strong { color: var(--ink); }

.work-byline {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  margin-bottom: 4px;
}
.work-byline strong {
  color: var(--ink);
  font-weight: 500;
}

.work-title {
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.35;
  font-weight: 420;
  font-variation-settings: "opsz" 18, "SOFT" 30;
  color: var(--ink);
  margin: 4px 0 10px;
}
.work-orig .work-title {
  font-size: 15px;
  color: var(--ink-soft);
  font-style: italic;
  font-variation-settings: "opsz" 14, "SOFT" 100;
}

.work-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--ink-quiet);
  align-items: center;
}
.work-meta a {
  color: var(--wiki-link);
  text-decoration: none;
}
.work-meta a:hover { text-decoration: underline; text-underline-offset: 2px; }

.cite-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: 2px 8px;
  border-radius: 999px;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
}
.cite-pill strong { color: var(--ink); font-weight: 600; }

/* ===== Suggestion section ===== */
.suggest {
  padding: 18px 28px 22px;
  border-top: 1px dashed var(--rule);
  background: var(--paper);
}

.suggest-block {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 14px;
}
.suggest-block:last-child { margin-bottom: 0; }

.suggest-marker {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-quiet);
  flex-shrink: 0;
  width: 92px;
  padding-top: 6px;
}

.suggest-content {
  flex: 1;
  min-width: 0;
}

.suggest-text {
  font-family: var(--font-display);
  font-size: 17px;
  font-variation-settings: "opsz" 24, "SOFT" 30;
  line-height: 1.45;
  color: var(--ink);
  font-weight: 380;
  border-left: 2px solid var(--rule);
  padding: 4px 0 4px 14px;
  margin: 0;
  font-style: italic;
}

.cite-block {
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--ink-soft);
  background: var(--paper-deep);
  border: 1px solid var(--rule);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 5.5em;
  overflow: hidden;
  position: relative;
  transition: max-height 250ms ease;
}
.cite-block.expanded { max-height: 60em; }
.cite-block::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1.6em;
  background: linear-gradient(to top, var(--paper-deep), transparent);
  pointer-events: none;
}
.cite-block.expanded::after { display: none; }

.suggest-buttons {
  display: flex;
  gap: 8px;
  margin-top: 8px;
  flex-wrap: wrap;
}

.btn {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 6px 11px;
  background: transparent;
  color: var(--ink-soft);
  border: 1px solid var(--rule);
  border-radius: 2px;
  cursor: pointer;
  transition: all 140ms;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.btn:hover {
  color: var(--ink);
  border-color: var(--ink-soft);
  background: var(--paper);
}
.btn.copied {
  color: var(--successful);
  border-color: var(--successful);
  background: var(--successful-bg);
}

/* ===== Excerpt disclosure ===== */
.excerpt {
  margin-top: 14px;
  border-top: 1px dotted var(--rule);
  padding-top: 14px;
}
.excerpt summary {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-quiet);
  cursor: pointer;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  outline: none;
}
.excerpt summary::-webkit-details-marker { display: none; }
.excerpt summary:hover { color: var(--ink); }
.excerpt summary::before {
  content: "+";
  font-family: var(--font-mono);
  font-size: 14px;
  width: 14px;
  display: inline-block;
  text-align: center;
}
.excerpt[open] summary::before { content: "−"; }

.excerpt-text {
  font-family: var(--font-display);
  font-size: 14px;
  font-variation-settings: "opsz" 14, "SOFT" 30;
  line-height: 1.6;
  color: var(--ink-soft);
  background: var(--paper-deep);
  padding: 12px 14px;
  border-left: 2px solid var(--rule);
  margin: 10px 0 0;
  font-style: italic;
}

/* =========================================================
   Footer
   ========================================================= */
.footer {
  max-width: var(--content-max);
  margin: 64px auto 0;
  padding: 24px 32px 80px;
  border-top: 1px solid var(--rule);
  font-family: var(--font-display);
  font-size: 14px;
  font-variation-settings: "opsz" 14;
  color: var(--ink-soft);
  line-height: 1.65;
  position: relative;
  z-index: 1;
}
.footer p { margin: 0 0 10px; }
.footer-fine {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--ink-quiet);
}
.footer a {
  color: var(--ink-soft);
  text-decoration: underline;
  text-decoration-color: var(--rule);
  text-underline-offset: 3px;
}
.footer a:hover { color: var(--ink); text-decoration-color: var(--ink); }

/* =========================================================
   Toast
   ========================================================= */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translate(-50%, 20px);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  padding: 10px 18px;
  border-radius: 2px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms, transform 200ms;
  z-index: 100;
}
.toast.visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 900px) {
  .controls-inner { grid-template-columns: 1fr; gap: 14px; }
  .control-block-end { justify-self: stretch; }
  .card-body { grid-template-columns: 1fr; }
  .card-body::before { display: none; }
  .work-rep { border-left: none; border-top: 1px dashed var(--rule); }
  .card-head { flex-direction: column; align-items: stretch; gap: 12px; }
  .card-actions { justify-content: flex-start; }
  .suggest-block { flex-direction: column; gap: 6px; }
  .suggest-marker { width: auto; padding-top: 0; }
  .masthead { padding: 36px 24px 20px; }
  .feed { padding: 16px 24px 48px; }
  .controls { padding: 14px 20px 12px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}