/* ============================================================
   Loki — ECG Record Viewer (editorial design system)
   Light palette is default; dark via data-theme="dark" on :root
   or OS fallback via @media (prefers-color-scheme: dark).
   Design tokens aligned with Kraken/Tesseract editorial system.
   ============================================================ */

:root {
  /* surfaces */
  --bg:        #F5F3F8;
  --bg-2:      #FFFFFF;
  --bg-3:      #EDE8F2;
  --surface:   #F0ECF5;

  /* ink — all ≥ 4.5:1 on --bg */
  --ink:       #0B0E14;
  --ink-2:     #2F3647;
  --ink-3:     #525A6E;
  --muted:     #6A7286;
  --muted-2:   #8A90A0;

  /* borders */
  --border:    #D5DAE2;
  --border-2:  #C8CDD8;
  --border-3:  #8A90A0;

  /* elevation */
  --card-shadow: 0 1px 2px rgba(15,20,35,0.05), 0 1px 1px rgba(15,20,35,0.03);

  /* accent — magenta/fuchsia */
  --accent:        #CC00CC;
  --accent-2:      #AA00AA;
  --accent-bright: #EE00EE;
  --accent-surface:rgba(238,0,238,0.10);
  --accent-on:     #FFFFFF;

  /* semantic colors */
  --system-red:    #B5171F;
  --system-red-surface: #FDE1E1;
  --system-green:  #0E8F4B;
  --system-green-surface: #D4F4E1;

  /* json syntax */
  --json-key:    #CC00CC;
  --json-string: #0E8F4B;
  --json-number: #2A5CB8;
  --json-bool:   #5C3FB3;
  --json-null:   #8A90A0;

  /* focus ring */
  --focus-ring: 0 0 0 2px var(--bg-2), 0 0 0 4px var(--accent-2);

  /* motion */
  --ease-ui:   cubic-bezier(0.25, 0.1, 0.25, 1);
  --ease-out:  cubic-bezier(0.28, 0.11, 0.32, 1);
  --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
  --dur-xfast: 140ms;
  --dur-fast:  200ms;
  --dur-med:   400ms;

  /* type */
  --font-sans:    'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono:    'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  --font-display: 'Cormorant', Georgia, 'Times New Roman', serif;

  /* scale */
  --s-h1:     clamp(32px, 4vw, 48px);
  --s-h2:     28px;
  --s-h3:     20px;
  --s-body:   17px;
  --s-small:  15px;
  --s-ui:     14px;
  --s-mono:   14px;

  --lh-body:  1.62;
  --ls-tight: -0.02em;
  --ls-wide:  0.12em;
  --ls-badge: 0.20em;

  /* layout */
  --max-page:  1200px;
  --pad-x:     56px;
  --pad-x-mob: 20px;
  --hairline:  1px solid var(--border);

  /* radius — editorial = 0 (sharp) */
  --radius-s:  0;
  --radius-m:  0;
  --radius-l:  0;

  /* shadows */
  --shadow-s:  0 1px 3px rgba(15,20,35,0.05), 0 1px 2px rgba(15,20,35,0.03);
  --shadow-m:  0 4px 12px rgba(15,20,35,0.06), 0 1px 4px rgba(15,20,35,0.04);
  --shadow-l:  0 12px 40px rgba(15,20,35,0.1), 0 4px 12px rgba(15,20,35,0.04);
  --shadow-xl: 0 24px 80px rgba(15,20,35,0.14), 0 8px 24px rgba(15,20,35,0.06);
}

/* ---------- reset --------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-text-size-adjust: 100%;
  background: var(--bg);
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-sans);
  font-size: var(--s-body);
  line-height: var(--lh-body);
  color: var(--ink-2);
  background: var(--bg);
  min-height: 100vh;
}
code, .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}
a { color: inherit; text-decoration: none; }
::selection { background: var(--accent); color: var(--accent-on); }

/* ---------- a11y --------------------------------------- */
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: 2px;
}

/* ---------- page shell ---------------------------------- */
.loki-page {
  max-width: var(--max-page);
  margin: 0 auto;
  padding: 40px var(--pad-x) 80px;
}
@media (max-width: 768px) {
  .loki-page { padding: 28px var(--pad-x-mob) 56px; }
}

/* ---------- masthead ------------------------------------ */
.masthead { margin-bottom: 72px; }
.mast-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.wordmark {
  font-family: var(--font-display);
  font-size: clamp(26px, 2.4vw, 34px);
  font-weight: 600;
  letter-spacing: 0;
  color: var(--ink);
}
.badge {
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  font-weight: 500;
  letter-spacing: var(--ls-badge);
  text-transform: uppercase;
  color: var(--accent);
  padding: 7px 14px;
  border: 1px solid var(--accent);
  border-radius: 999px;
  white-space: nowrap;
}
hr.rule {
  border: 0; height: 2px;
  background:
    linear-gradient(90deg,
      var(--accent-bright) 0,
      var(--accent-bright) 120px,
      var(--border) 120px,
      var(--border) 100%);
  margin: 22px 0;
}
.thesis {
  font-family: var(--font-display);
  font-size: clamp(26px, 3vw, 42px);
  line-height: 1.15;
  letter-spacing: var(--ls-tight);
  color: var(--ink);
  font-weight: 500;
  max-width: 860px;
  margin-top: 12px;
}
.thesis em {
  color: var(--accent);
  font-style: italic;
  font-weight: 500;
}
.byline {
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-3);
}
.byline a { color: var(--ink-2); border-bottom: 1px solid var(--border-2); }
.byline a:hover { color: var(--ink); border-color: var(--ink-3); }

.section-desc {
  max-width: 720px;
  font-size: var(--s-small);
  color: var(--ink-2);
  margin-bottom: 28px;
}

.viewer-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.viewer-search {
  flex: 1;
  min-width: 200px;
  position: relative;
}
.viewer-search svg {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--ink-3);
  pointer-events: none;
}
.viewer-search input {
  width: 100%;
  padding: 10px 12px 10px 36px;
  font-size: var(--s-ui);
  font-family: var(--font-mono);
  border: var(--hairline);
  background: var(--bg-2);
  color: var(--ink);
  outline: none;
  transition: border-color var(--dur-fast) var(--ease-ui), box-shadow var(--dur-fast) var(--ease-ui);
}
.viewer-search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-surface);
}
.viewer-search input::placeholder { color: var(--ink-3); }
.viewer-filters {
  display: flex;
  gap: 8px;
}
.viewer-filters select {
  padding: 10px 32px 10px 12px;
  font-size: var(--s-ui);
  font-family: var(--font-mono);
  border: var(--hairline);
  background: var(--bg-2);
  color: var(--ink);
  cursor: pointer;
  outline: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M3 5l3 3 3-3' fill='none' stroke='%23525A6E' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  transition: border-color var(--dur-fast) var(--ease-ui);
}
.viewer-filters select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-surface);
}
.viewer-meta {
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-3);
  white-space: nowrap;
}

/* ---------- table section ------------------------------- */
.loki-table-section {
  width: 100%;
  background: var(--bg-2);
  border: var(--hairline);
  box-shadow: var(--card-shadow);
  overflow: hidden;
}
.table-wrap {
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
}
.loki-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: var(--s-mono);
  table-layout: fixed;
}
.loki-table thead {
  border-bottom: 1px solid var(--border-2);
}
.loki-table th {
  padding: 12px 20px;
  font-size: var(--s-ui);
  font-weight: 500;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-3);
  text-align: left;
  white-space: nowrap;
  background: var(--bg-3);
  cursor: pointer;
  user-select: none;
  transition: color var(--dur-xfast) var(--ease-ui);
}
.loki-table th:hover { color: var(--ink); }
.loki-table th::after { content: " ↓"; visibility: hidden; }
.loki-table th.sort-asc::after { content: " ↑"; color: var(--accent); visibility: visible; }
.loki-table th.sort-desc::after { content: " ↓"; color: var(--accent); visibility: visible; }
.loki-table th.th-expand { cursor: default; }
.loki-table th.th-expand::after { content: none; }
.loki-table th.th-num { width: 52px; }
.loki-table th[data-sort="record"] { width: auto; }
.loki-table th[data-sort="age"] { width: 70px; }
.loki-table th[data-sort="gender"] { width: 60px; }
.loki-table th[data-sort="diagnosis"] { width: 220px; }
.loki-table th[data-sort="hr"] { width: 60px; }
.loki-table th[data-sort="qrs"] { width: 60px; }
.loki-table .th-expand { width: 44px; }
.loki-table td {
  padding: 14px 20px;
  font-size: var(--s-small);
  color: var(--ink-2);
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.loki-table tbody tr.data-row {
  cursor: pointer;
  transition: background var(--dur-xfast) var(--ease-ui);
}
.loki-table tbody tr.data-row:hover {
  background: var(--bg-3);
}
.loki-table tbody tr.data-row:active {
  background: color-mix(in oklab, var(--accent) 6%, transparent);
}
.loki-table tbody tr.data-row.expanded {
  background: var(--bg-3);
}

/* cell styles */
.td-num {
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  color: var(--muted);
  font-size: var(--s-ui);
  width: 52px;
}
.td-id {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  font-weight: 500;
  letter-spacing: -0.02em;
}
.td-gender { font-weight: 600; font-size: var(--s-ui); color: var(--ink); }
.td-diagnosis { max-width: 200px; }

.badge-diseased {
  display: inline-block;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--system-red-surface);
  color: var(--system-red);
  border: 1px solid color-mix(in oklab, var(--system-red) 40%, transparent);
}
.badge-normal {
  display: inline-block;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--system-green-surface);
  color: var(--system-green);
  border: 1px solid color-mix(in oklab, var(--system-green) 40%, transparent);
}

.th-expand { width: 44px; }
.td-expand { text-align: center; }
.td-expand svg {
  color: var(--ink-3);
  transition: transform var(--dur-fast) var(--ease-out), color var(--dur-xfast) var(--ease-ui);
}
.data-row.expanded .td-expand svg {
  transform: rotate(180deg);
  color: var(--accent);
}
.loading-row td {
  text-align: center;
  padding: 60px;
  color: var(--muted);
  font-size: var(--s-small);
}

/* ---------- detail row ---------------------------------- */
.detail-row { display: none; }
.detail-row.visible { display: table-row; }
.detail-row td { padding: 0 !important; border-bottom: none; }
.detail-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 420px;
  border-top: 1px solid var(--border);
  animation: slideDown 0.35s var(--ease-out);
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- JSON panel ---------------------------------- */
.detail-json {
  padding: 28px;
  overflow: auto;
  max-height: 520px;
  border-right: 1px solid var(--border);
  background: var(--bg-3);
}
.detail-json pre {
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  white-space: pre;
  tab-size: 2;
  margin: 0;
  color: var(--ink-2);
}
.detail-json .jk { color: var(--json-key); font-weight: 500; }
.detail-json .js { color: var(--json-string); }
.detail-json .jn { color: var(--json-number); font-weight: 500; }
.detail-json .jb { color: var(--json-bool); font-weight: 600; }
.detail-json .jnull { color: var(--json-null); font-style: italic; }
.detail-json .jbracket { color: var(--muted); }
.detail-json .jtoggle {
  cursor: pointer;
  user-select: none;
  color: var(--accent);
  font-size: 9px;
  display: inline-block;
  width: 14px;
  text-align: center;
  transition: color var(--dur-xfast) var(--ease-ui);
  vertical-align: middle;
}
.detail-json .jtoggle:hover { color: var(--accent-2); }
.detail-json .jcollapsed-hint { color: var(--muted); font-size: 11px; font-style: italic; margin-left: 2px; }
.detail-json .jtree-block { display: inline; }
.detail-json .jtree-block.jcollapsed { display: none; }
.detail-json::-webkit-scrollbar { width: 8px; height: 8px; }
.detail-json::-webkit-scrollbar-track { background: transparent; }
.detail-json::-webkit-scrollbar-thumb { background: var(--border-2); border-radius: 100px; border: 2px solid var(--bg-3); }

/* ---------- image panel --------------------------------- */
.detail-image {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-2);
  cursor: pointer;
  position: relative;
  padding: 32px;
  overflow: hidden;
}
.detail-image img {
  max-width: 100%;
  max-height: 440px;
  object-fit: contain;
  transition: transform var(--dur-med) var(--ease-out), box-shadow var(--dur-med) var(--ease-out);
  box-shadow: var(--shadow-s);
  border: 1px solid var(--border);
}
.detail-image:hover img {
  transform: scale(1.015);
  box-shadow: var(--shadow-l);
}
.detail-image .img-hint {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  padding: 5px 12px;
  background: color-mix(in oklab, var(--bg-2) 92%, transparent);
  border: 1px solid var(--border-2);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink);
  opacity: 0;
  transition: opacity var(--dur-xfast) var(--ease-ui), transform var(--dur-xfast) var(--ease-ui);
  pointer-events: none;
}
.detail-image:hover .img-hint {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ---------- lightbox ------------------------------------ */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-med) var(--ease-out), visibility var(--dur-med);
}
.lightbox.active { opacity: 1; visibility: visible; }
.lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 20, 35, 0.78);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
}
.lightbox-content {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  animation: lbIn 0.4s var(--ease-spring);
}
@keyframes lbIn {
  from { transform: scale(0.92); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}
.lightbox-content img {
  display: block;
  max-width: 92vw;
  max-height: 82vh;
  width: auto;
  height: auto;
  object-fit: contain;
  box-shadow: var(--shadow-xl);
  background: var(--bg-2);
  border: 1px solid var(--border);
  transition: transform 0.25s var(--ease-ui);
  cursor: zoom-in;
  transform-origin: center center;
}
.lightbox-close {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 10002;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.25);
  color: rgba(255,255,255,0.9);
  width: 44px;
  height: 44px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--dur-xfast) var(--ease-ui), border-color var(--dur-xfast) var(--ease-ui), transform var(--dur-xfast) var(--ease-ui);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.lightbox-close:hover { background: rgba(255,255,255,0.2); transform: scale(1.08); }
.lightbox-close:active { transform: scale(0.95); }
.lightbox-zoom-bar {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10002;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: rgba(15,20,35,0.85);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 999px;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 8px 40px rgba(0,0,0,0.3);
}
.lb-zoom-btn {
  width: 36px;
  height: 32px;
  border: none;
  background: rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.9);
  font-size: 18px;
  font-weight: 400;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--dur-xfast) var(--ease-ui), transform var(--dur-xfast) var(--ease-ui);
}
.lb-zoom-btn:hover { background: rgba(255,255,255,0.2); }
.lb-zoom-btn:active { background: rgba(255,255,255,0.3); transform: scale(0.92); }
.lb-zoom-level {
  color: rgba(255,255,255,0.7);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  min-width: 52px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}
.lightbox-caption {
  color: rgba(255,255,255,0.5);
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
}

/* ---------- sections ------------------------------------ */
.section {
  margin-bottom: 72px;
}
.section-label {
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 22px;
  padding-bottom: 14px;
  border-bottom: var(--hairline);
}

/* ---------- overview grid ------------------------------- */
.overview-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 48px;
  align-items: start;
}
@media (max-width: 900px) {
  .overview-grid { grid-template-columns: 1fr; gap: 28px; }
}
.prose {
  max-width: 720px;
  font-size: var(--s-body);
  line-height: 1.65;
  color: var(--ink-2);
}

/* ---------- glance sidebar ------------------------------ */
.glance {
  border: var(--hairline);
  background: var(--bg-2);
  padding: 22px 22px 20px;
  position: relative;
  box-shadow: var(--card-shadow);
}
.glance::before {
  content: "";
  position: absolute;
  top: 0; left: 0; width: 3px; height: 100%;
  background: var(--accent);
}
.glance-label {
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-3);
  padding-bottom: 14px;
  margin-bottom: 16px;
  border-bottom: var(--hairline);
}
.glance-list { display: grid; gap: 10px; margin: 0; }
.glance-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  font-family: var(--font-mono);
}
.glance-row dt {
  font-size: 13px;
  color: var(--ink-3);
  letter-spacing: 0.02em;
}
.glance-row dd {
  margin: 0;
  font-size: 13px;
  color: var(--ink-2);
  text-align: right;
}
.glance-row dd b {
  color: var(--accent);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* ---------- KPI cards ----------------------------------- */
.kpi-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
@media (max-width: 900px) {
  .kpi-row { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 500px) {
  .kpi-row { grid-template-columns: 1fr; }
}
.kpi-card {
  border: var(--hairline);
  background: var(--bg-2);
  padding: 20px 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 128px;
  transition: border-color var(--dur-fast) var(--ease-ui), box-shadow var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
  box-shadow: var(--card-shadow);
}
.kpi-card:hover {
  border-color: var(--accent);
  box-shadow: 0 6px 16px rgba(15,20,35,0.08), 0 1px 2px rgba(15,20,35,0.04);
  transform: translateY(-1px);
}
.kpi-card--accent {
  border-left: 3px solid var(--accent-bright);
  background: linear-gradient(180deg, var(--accent-surface), color-mix(in oklab, var(--accent-surface) 30%, var(--bg-2)));
}
.kpi-label {
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-3);
}
.kpi-value {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-top: 4px;
}
.kpi-big {
  font-family: var(--font-display);
  font-size: clamp(32px, 3.4vw, 44px);
  font-weight: 500;
  color: var(--ink);
  letter-spacing: var(--ls-tight);
  line-height: 1;
  font-variant-numeric: tabular-nums lining-nums;
}
.kpi-card--accent .kpi-big { color: var(--accent); }
.kpi-suffix {
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  color: var(--ink-3);
  letter-spacing: 0.06em;
}
.kpi-sub {
  margin-top: auto;
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.02em;
}

/* ---------- footer -------------------------------------- */
.foot {
  margin-top: 88px;
  padding-top: 26px;
  border-top: var(--hairline);
  text-align: center;
}
.foot-inner {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-3);
}
.foot-inner a {
  color: var(--ink-2);
  border-bottom: 1px solid var(--border-2);
  transition: color var(--dur-xfast) var(--ease-ui), border-color var(--dur-xfast) var(--ease-ui);
}
.foot-inner a:hover {
  color: var(--ink);
  border-color: var(--accent);
}

/* ---------- theme toggle -------------------------------- */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 50;
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-2);
  border-radius: 999px;
  background: var(--bg-2);
  color: var(--ink-2);
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease-ui), background var(--dur-fast) var(--ease-ui), transform var(--dur-fast) var(--ease-ui);
  box-shadow: 0 2px 8px rgba(15,20,35,0.06);
}
.theme-toggle:hover {
  border-color: var(--border-3);
  background: var(--bg-3);
}
.theme-toggle:active { transform: scale(0.95); }
.theme-toggle svg { width: 18px; height: 18px; display: block; }
.theme-toggle .icon-sun  { display: none; }
.theme-toggle .icon-moon { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-sun  { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .theme-toggle .icon-sun  { display: block; }
  :root:not([data-theme]) .theme-toggle .icon-moon { display: none; }
}
@media (max-width: 640px) {
  .theme-toggle { top: 12px; right: 12px; width: 36px; height: 36px; }
  .theme-toggle svg { width: 16px; height: 16px; }
}

/* ---------- responsive ---------------------------------- */
@media (max-width: 960px) {
  .loki-page { padding: 40px 20px 40px; }
  .loki-title { font-size: clamp(28px, 4vw, 34px); }
  .loki-subtitle { font-size: 13px; }
  .detail-content { grid-template-columns: 1fr; }
  .detail-json { max-height: 300px; border-right: none; border-bottom: 1px solid var(--border); }
  .loki-header { margin-bottom: 40px; }
}
@media (max-width: 600px) {
  .loki-table th, .loki-table td { padding: 12px 14px; font-size: 13px; }
  .loki-title { font-size: 28px; }
  .td-diagnosis { max-width: 120px; }
}

/* ---------- reduced motion ------------------------------ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================================
   DARK MODE
   Two activation paths:
   1. User toggle  — :root[data-theme="dark"]
   2. OS fallback  — :root:not([data-theme]) inside
      prefers-color-scheme: dark
   ============================================================ */
:root[data-theme="dark"],
:root[data-theme="dark"] body {
  color-scheme: dark;
}
:root[data-theme="dark"] {
  /* surfaces */
  --bg:        #0B0E14;
  --bg-2:      #151A28;
  --bg-3:      #1E2436;
  --surface:   #192030;

  --card-shadow: none;

  /* ink */
  --ink:       #F3F5F9;
  --ink-2:     #C5CBE9;
  --ink-3:     #8B93B0;
  --muted:     #7A82A0;
  --muted-2:   #828898;

  /* borders */
  --border:    #2A3148;
  --border-2:  #3A4568;
  --border-3:  #4A5578;

  /* accent — magenta */
  --accent:          #EE00EE;
  --accent-2:        #FF44FF;
  --accent-bright:   #EE00EE;
  --accent-surface:  rgba(238,0,238,0.12);
  --accent-on:       #FFFFFF;

  /* semantic */
  --system-red:    #FF8F8F;
  --system-red-surface: rgba(255,143,143,0.12);
  --system-green:  #5EE695;
  --system-green-surface: rgba(94,230,149,0.14);

  /* json syntax */
  --json-key:    #FF44FF;
  --json-string: #5EE695;
  --json-number: #89B5FF;
  --json-bool:   #CDB0FF;
  --json-null:   #7A82A0;

  /* focus ring */
  --focus-ring: 0 0 0 2px var(--bg), 0 0 0 4px var(--accent);
}

:root[data-theme="dark"] body {
  background:
    radial-gradient(ellipse 900px 520px at 20% -10%, rgba(137,181,255,0.05), transparent 60%),
    radial-gradient(ellipse 700px 420px at 120% 0%, rgba(205,176,255,0.04), transparent 60%),
    var(--bg);
}

:root[data-theme="dark"] .lightbox-backdrop {
  background: rgba(0, 0, 0, 0.85);
}

/* OS fallback */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg: #0B0E14;  --bg-2: #151A28;  --bg-3: #1E2436;  --surface: #192030;
    --card-shadow: none;
    --ink: #F3F5F9;  --ink-2: #C5CBE9;  --ink-3: #8B93B0;
    --muted: #7A82A0;  --muted-2: #828898;
    --border: #2A3148;  --border-2: #3A4568;  --border-3: #4A5578;
    --accent: #EE00EE;  --accent-2: #FF44FF;  --accent-bright: #EE00EE;
    --accent-surface: rgba(238,0,238,0.12);  --accent-on: #FFFFFF;
    --system-red: #FF8F8F;  --system-red-surface: rgba(255,143,143,0.12);
    --system-green: #5EE695;  --system-green-surface: rgba(94,230,149,0.14);
    --json-key: #FF44FF;  --json-string: #5EE695;  --json-number: #89B5FF;
    --json-bool: #CDB0FF;  --json-null: #7A82A0;
    --focus-ring: 0 0 0 2px var(--bg), 0 0 0 4px var(--accent);
    color-scheme: dark;
  }
  :root:not([data-theme]) body {
    background:
      radial-gradient(ellipse 900px 520px at 20% -10%, rgba(137,181,255,0.05), transparent 60%),
      radial-gradient(ellipse 700px 420px at 120% 0%, rgba(205,176,255,0.04), transparent 60%),
      var(--bg);
  }
  :root:not([data-theme]) .lightbox-backdrop {
    background: rgba(0, 0, 0, 0.85);
  }
}