/* =====================================================
   Strata · Tiered Memory Aging Simulator
   Design tokens, layout, components.
   ===================================================== */

:root {
  /* Dark palette (default) */
  --bg: #0a0e1c;
  --bg-soft: #0e1429;
  --surface: #141a30;
  --surface-2: #1a2140;
  --surface-3: #232b50;
  --border: #2a3258;
  --border-strong: #3a4374;
  --text: #e9ecf8;
  --text-muted: #97a0c2;
  --text-dim: #6a7396;

  /* Tier colors */
  --c-active: #34d399;   /* emerald */
  --c-locked: #f59e0b;   /* amber */
  --c-delete: #ef4444;   /* red */
  --c-purged: #64748b;   /* slate */

  /* Status */
  --c-hold: #818cf8;
  --c-firewall: #22d3ee;
  --c-go: #34d399;
  --c-review: #fbbf24;
  --c-nogo: #f87171;

  /* Layout */
  --gap: 14px;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 0 rgba(255,255,255,.04) inset, 0 8px 24px rgba(0,0,0,.35);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, system-ui, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --t-fast: 140ms;
  --t-med: 280ms;
  --t-slow: 520ms;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f4f6fc;
    --bg-soft: #ffffff;
    --surface: #ffffff;
    --surface-2: #f8faff;
    --surface-3: #eef1fb;
    --border: #d9dff0;
    --border-strong: #b4becf;
    --text: #18203b;
    --text-muted: #4d5876;
    --text-dim: #7a85a3;
    --c-purged: #8b94ab;
    --shadow: 0 1px 0 rgba(255,255,255,1) inset, 0 8px 24px rgba(36,52,98,.08);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { color-scheme: dark light; }

body {
  font-family: var(--font-sans);
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 8% -10%, rgba(52,211,153,0.07), transparent 60%),
    radial-gradient(1200px 600px at 95% 5%, rgba(245,158,11,0.06), transparent 60%),
    radial-gradient(1400px 800px at 50% 115%, rgba(99,102,241,0.07), transparent 60%),
    var(--bg);
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto auto;
  grid-template-columns: 320px 1fr 360px;
  grid-template-areas:
    "header header header"
    "left   stage  right"
    "tl     tl     tl"
    "foot   foot   foot";
  gap: var(--gap);
  padding: var(--gap);
}

@media (max-width: 1180px) {
  body {
    grid-template-columns: 280px 1fr 320px;
  }
}

@media (max-width: 980px) {
  body {
    grid-template-columns: 1fr;
    grid-template-areas:
      "header"
      "stage"
      "left"
      "right"
      "tl"
      "foot";
  }
}

h1, h2, h3, h4 { margin: 0; font-weight: 600; letter-spacing: -0.01em; }
h1 { font-size: 18px; }
h2 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); }
h3 { font-size: 14.5px; }

p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }

a { color: inherit; }
button { font: inherit; color: inherit; cursor: pointer; }

/* =====================================================
   Accessibility helpers
   ===================================================== */
.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: 8px; top: -50px;
  background: var(--surface);
  color: var(--text);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  z-index: 100;
  transition: top var(--t-fast) ease;
  text-decoration: none;
}
.skip-link:focus { top: 8px; outline: 2px solid var(--c-firewall); outline-offset: 2px; }

:focus-visible {
  outline: 2px solid var(--c-firewall);
  outline-offset: 2px;
  border-radius: 6px;
}

/* =====================================================
   Header
   ===================================================== */
.app-header {
  grid-area: header;
  display: grid;
  grid-template-columns: minmax(260px, 1fr) auto auto;
  gap: 20px;
  align-items: center;
  background: linear-gradient(180deg, var(--surface) 0%, var(--surface-2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 18px;
  box-shadow: var(--shadow);
}

.brand {
  display: flex;
  gap: 14px;
  align-items: center;
  min-width: 0;
}
.logo {
  width: 36px;
  height: 36px;
  flex: 0 0 auto;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,.35));
}
.brand-text { min-width: 0; }
.brand-text h1 { line-height: 1.1; }
.tagline {
  color: var(--text-muted);
  font-size: 12.5px;
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.clock-panel {
  display: flex;
  gap: 12px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 12px;
}
.clock-block {
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-width: 84px;
}
.clock-label {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}
.clock-value {
  font-family: var(--font-mono);
  font-size: 16px;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}

.control-cluster {
  display: flex;
  gap: 10px;
  align-items: center;
}

/* =====================================================
   Buttons & Form controls
   ===================================================== */
.btn {
  --btn-bg: var(--surface-2);
  --btn-bd: var(--border);
  --btn-fg: var(--text);
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 1px solid var(--btn-bd);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 13px;
  display: inline-flex;
  gap: 6px;
  align-items: center;
  justify-content: center;
  transition: background var(--t-fast) ease, border-color var(--t-fast) ease, transform var(--t-fast) ease;
  text-align: left;
  min-height: 36px;
}
.btn:hover { background: var(--surface-3); border-color: var(--border-strong); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary {
  --btn-bg: linear-gradient(180deg, #2c3a78 0%, #1f2a5e 100%);
  --btn-bd: #4252a4;
  --btn-fg: #ffffff;
}
.btn-primary:hover { background: linear-gradient(180deg, #3a4ba0 0%, #2a3a86 100%); border-color: #607ccf; }

.btn-ghost { background: transparent; }
.btn-ghost:hover { background: var(--surface-2); }

.btn-warn { color: var(--c-delete); border-color: rgba(239,68,68,0.35); }
.btn-warn:hover { background: rgba(239,68,68,0.08); }

.btn-icon { padding: 8px 10px; }
.btn-label { font-size: 13px; }

.icon { display: inline-block; width: 14px; height: 14px; }
.icon-pause {
  background:
    linear-gradient(currentColor, currentColor) 2px 0/3px 14px no-repeat,
    linear-gradient(currentColor, currentColor) 9px 0/3px 14px no-repeat;
}
.icon-play {
  width: 0; height: 0;
  border-style: solid;
  border-width: 7px 0 7px 11px;
  border-color: transparent transparent transparent currentColor;
  margin: 0 1px;
}

.btn-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 8px;
}
.btn-row .btn { width: 100%; }

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  width: 100%;
  height: 22px;
  margin: 0;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 4px;
  background: linear-gradient(90deg, var(--surface-3), var(--border-strong));
  border-radius: 999px;
}
input[type="range"]::-moz-range-track {
  height: 4px;
  background: var(--surface-3);
  border-radius: 999px;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--c-firewall);
  border: 2px solid var(--bg);
  margin-top: -6px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.45);
  cursor: grab;
}
input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--c-firewall);
  border: 2px solid var(--bg);
  box-shadow: 0 2px 6px rgba(0,0,0,0.45);
  cursor: grab;
}

select, .select-label select {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  font-size: 13px;
  min-height: 32px;
}

.select-label {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}
.select-label.small { font-size: 10.5px; }

.speed-control { display: inline-flex; align-items: center; width: 160px; }

/* =====================================================
   Cards & Panels
   ===================================================== */
.left-panel { grid-area: left; }
.right-panel { grid-area: right; }
.left-panel, .right-panel {
  display: flex;
  flex-direction: column;
  gap: var(--gap);
  min-width: 0;
}

.card {
  background: linear-gradient(180deg, var(--surface) 0%, var(--surface-2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  box-shadow: var(--shadow);
}
.card h2 { margin-bottom: 8px; }
.card .hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 10px;
}
.muted { color: var(--text-muted); font-size: 12.5px; }

.ttl-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  margin-bottom: 10px;
  font-size: 12.5px;
  color: var(--text-muted);
}
.ttl-row label {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
}
.ttl-row output {
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-size: 12px;
  text-align: right;
}
.ttl-key {
  display: inline-flex;
  width: 22px; height: 22px;
  border-radius: 6px;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  background: var(--tier-color, var(--surface-3));
}
.ttl-key[data-tier="active"] { background: var(--c-active); color: #0a1f17; }
.ttl-key[data-tier="locked"] { background: var(--c-locked); color: #2a1a02; }
.ttl-key[data-tier="delete"] { background: var(--c-delete); color: #2a0808; }

.preset-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.preset-btn {
  flex-direction: column;
  align-items: flex-start;
  padding: 10px;
  text-align: left;
  min-height: 64px;
  gap: 2px;
}
.preset-title { font-size: 13px; font-weight: 600; }
.preset-sub { font-size: 11px; color: var(--text-muted); }

/* Overview stats */
.stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin: 0;
}
.stats > div {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
}
.stats dt {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}
.stats dd {
  margin: 2px 0 0 0;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.container-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 220px;
  overflow-y: auto;
  padding-right: 4px;
}
.container-row {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 8px;
  align-items: center;
  font-size: 12.5px;
}
.container-row .c-name {
  font-weight: 600;
  display: flex;
  gap: 6px;
  align-items: center;
}
.container-row .c-meta {
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-size: 11px;
}
.container-row .c-actions {
  display: inline-flex;
  gap: 4px;
}
.icon-btn {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 13px;
}
.icon-btn:hover { color: var(--text); background: var(--surface-3); border-color: var(--border-strong); }
.icon-btn.danger:hover { color: var(--c-delete); border-color: var(--c-delete); }
.icon-btn.held { color: var(--c-hold); border-color: var(--c-hold); }

.hold-dot {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--c-hold);
  box-shadow: 0 0 0 3px rgba(129,140,248,0.18);
}

/* Soak result */
.soak-controls {
  display: flex;
  gap: 8px;
  align-items: flex-end;
  margin-bottom: 10px;
}
.soak-controls .btn { margin-left: auto; }
.soak-result {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px;
  font-size: 12.5px;
}
.verdict {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}
.verdict[data-v="go"]     { background: rgba(52,211,153,0.12); color: var(--c-go); border: 1px solid rgba(52,211,153,0.4); }
.verdict[data-v="review"] { background: rgba(251,191,36,0.12); color: var(--c-review); border: 1px solid rgba(251,191,36,0.4); }
.verdict[data-v="nogo"]   { background: rgba(248,113,113,0.12); color: var(--c-nogo); border: 1px solid rgba(248,113,113,0.4); }
.verdict-dot {
  display: inline-block; width: 8px; height: 8px; border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 12px currentColor;
}
.soak-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin: 8px 0;
}
.soak-meta > div {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 8px;
}
.soak-meta dt {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}
.soak-meta dd {
  margin: 1px 0 0 0;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text);
}
.soak-issues {
  margin-top: 6px;
  font-size: 11.5px;
  color: var(--c-nogo);
}
.soak-events {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  max-height: 110px;
  overflow-y: auto;
  border-top: 1px dashed var(--border);
  padding-top: 6px;
  margin-top: 6px;
}

/* Event log */
.log {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 260px;
  overflow-y: auto;
  font-size: 12px;
  font-family: var(--font-mono);
  padding-right: 4px;
}
.log li {
  display: grid;
  grid-template-columns: 70px auto 1fr;
  gap: 8px;
  align-items: baseline;
  padding: 4px 6px;
  border-radius: 4px;
}
.log li:nth-child(odd) { background: var(--surface-2); }
.log .t { color: var(--text-dim); }
.log .k {
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 1px 6px;
  border-radius: 4px;
  background: var(--surface-3);
  color: var(--text-muted);
}
.log .k[data-k="age"]      { color: var(--c-locked); background: rgba(245,158,11,0.1); }
.log .k[data-k="purge"]    { color: var(--c-delete); background: rgba(239,68,68,0.1); }
.log .k[data-k="hold"]     { color: var(--c-hold);   background: rgba(129,140,248,0.1); }
.log .k[data-k="restore"]  { color: var(--c-active); background: rgba(52,211,153,0.1); }
.log .k[data-k="spawn"]    { color: var(--c-firewall); background: rgba(34,211,238,0.1); }
.log .k[data-k="ref"]      { color: var(--c-firewall); background: rgba(34,211,238,0.1); }
.log .k[data-k="cfg"]      { color: var(--text-muted); }

/* =====================================================
   Stage & tiers
   ===================================================== */
.stage {
  grid-area: stage;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: var(--gap);
  min-height: 540px;
}
@media (max-width: 720px) {
  .stage { grid-template-columns: 1fr; grid-template-rows: repeat(4, minmax(160px, auto)); }
}

.tier {
  position: relative;
  background:
    radial-gradient(800px 200px at 50% -50%, var(--tier-glow, transparent), transparent 70%),
    linear-gradient(180deg, var(--surface) 0%, var(--surface-2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
  transition: border-color var(--t-med) ease;
}
.tier[data-tier="active"] { --tier-color: var(--c-active); --tier-glow: rgba(52,211,153,0.08); }
.tier[data-tier="locked"] { --tier-color: var(--c-locked); --tier-glow: rgba(245,158,11,0.08); }
.tier[data-tier="delete"] { --tier-color: var(--c-delete); --tier-glow: rgba(239,68,68,0.08); }
.tier[data-tier="purged"] { --tier-color: var(--c-purged); --tier-glow: rgba(100,116,139,0.06); }

.tier::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--tier-color);
  opacity: 0.7;
}

.tier > header {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 8px;
  align-items: center;
  margin-bottom: 4px;
}
.tier-title { display: inline-flex; gap: 8px; align-items: center; }
.tier-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--tier-color);
  box-shadow: 0 0 12px var(--tier-color);
}
.tier-sub {
  font-size: 11.5px;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.firewall-tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid rgba(34,211,238,0.35);
  color: var(--c-firewall);
  background: rgba(34,211,238,0.08);
  white-space: nowrap;
  justify-self: end;
}
.tier-count {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 14px;
  padding: 2px 8px;
  background: var(--surface-3);
  border-radius: 999px;
  color: var(--text);
}

.tier-bin {
  flex: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 8px;
  margin-top: 4px;
  border-radius: var(--radius-sm);
  background:
    repeating-linear-gradient(
      45deg,
      rgba(255,255,255,0.012) 0 14px,
      transparent 14px 28px
    );
  align-content: flex-start;
  overflow-y: auto;
  min-height: 110px;
  position: relative;
}
.tier-bin:empty::before {
  content: "Empty.";
  color: var(--text-dim);
  font-size: 11.5px;
  font-style: italic;
  margin: auto;
  opacity: 0.7;
}
.tier[data-tier="active"]  .tier-bin:empty::before { content: "Empty — spawn an item or load a preset."; }
.tier[data-tier="locked"]  .tier-bin:empty::before { content: "No items in quarantine yet."; }
.tier[data-tier="delete"]  .tier-bin:empty::before { content: "Pre-purge bin is empty."; }
.tier[data-tier="purged"]  .tier-bin:empty::before { content: "Nothing has been purged in this session."; }

/* =====================================================
   Items
   ===================================================== */
.item {
  --p: 0;
  position: relative;
  width: 62px;
  height: 62px;
  border-radius: 14px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 10px;
  cursor: pointer;
  transition: transform var(--t-fast) ease, border-color var(--t-fast) ease, box-shadow var(--t-fast) ease, background var(--t-fast) ease;
  padding: 0;
  isolation: isolate;
  text-align: center;
}
.item:hover {
  transform: translateY(-1px);
  border-color: var(--tier-color, var(--border-strong));
  box-shadow: 0 6px 16px rgba(0,0,0,0.35), 0 0 0 1px var(--tier-color);
}
.item-ring {
  position: absolute;
  inset: -2px;
  border-radius: 16px;
  padding: 2px;
  background:
    conic-gradient(
      var(--tier-color, var(--c-firewall)) calc(var(--p) * 1%),
      rgba(255,255,255,0.05) 0 100%
    );
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
          mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
  z-index: 0;
}
.item-label {
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.04em;
  z-index: 1;
}
.item-kind {
  font-size: 9px;
  color: var(--text-muted);
  z-index: 1;
  margin-top: 1px;
}

.item .badge {
  position: absolute;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  padding: 1px 5px;
  border-radius: 999px;
  background: var(--surface-3);
  border: 1px solid var(--border-strong);
  line-height: 1.2;
}
.item .badge-ref {
  bottom: -6px;
  right: -6px;
  background: var(--c-firewall);
  color: #04222a;
  border-color: #04222a;
}
.item .badge-hold {
  top: -6px;
  right: -6px;
  background: var(--c-hold);
  color: #fff;
  border-color: #2d2f6a;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px; height: 16px;
  padding: 0;
}

.item[data-tier="purged"] {
  opacity: 0.42;
  text-decoration: line-through;
  cursor: default;
}
.item[data-tier="purged"]:hover { transform: none; }

/* Almost-out-of-tier pulse */
.item.urgent .item-ring {
  animation: ring-pulse 1s ease-in-out infinite;
}
@keyframes ring-pulse {
  0%, 100% { filter: drop-shadow(0 0 0 var(--tier-color)); }
  50% { filter: drop-shadow(0 0 8px var(--tier-color)); }
}

/* Tier transition animation */
.item.fly {
  animation: pop-in var(--t-med) cubic-bezier(.2,.8,.2,1);
}
@keyframes pop-in {
  from { transform: scale(0.4); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.item.purging {
  animation: purge-out 700ms ease forwards;
  pointer-events: none;
}
@keyframes purge-out {
  0% { transform: scale(1); opacity: 1; filter: blur(0); }
  60% { transform: scale(1.1) rotate(6deg); opacity: 0.5; filter: blur(2px); }
  100% { transform: scale(0.3) rotate(-12deg); opacity: 0; filter: blur(6px); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* =====================================================
   Predictive timeline strip
   ===================================================== */
.timeline-strip {
  grid-area: tl;
  background: linear-gradient(180deg, var(--surface) 0%, var(--surface-2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  box-shadow: var(--shadow);
  position: relative;
}
.timeline-strip header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}
.timeline-strip h2 { margin-bottom: 2px; }
.timeline-tools { display: flex; gap: 16px; align-items: flex-end; flex-wrap: wrap; }
.timeline-legend { display: inline-flex; gap: 6px; flex-wrap: wrap; }
.legend-chip {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.legend-chip::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--tier-color, var(--text-muted));
}
.legend-chip[data-tier="active"] { --tier-color: var(--c-active); }
.legend-chip[data-tier="locked"] { --tier-color: var(--c-locked); }
.legend-chip[data-tier="delete"] { --tier-color: var(--c-delete); }
.legend-chip[data-tier="purged"] { --tier-color: var(--c-purged); }

.timeline-canvas-wrap {
  position: relative;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.timeline-svg {
  display: block;
  width: 100%;
  height: 160px;
}
.timeline-cursor {
  stroke: var(--c-firewall);
  stroke-width: 1.5;
  stroke-dasharray: 3 3;
  opacity: 0;
  pointer-events: none;
}
.timeline-tooltip {
  position: absolute;
  pointer-events: none;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 11.5px;
  font-family: var(--font-mono);
  color: var(--text);
  box-shadow: 0 8px 20px rgba(0,0,0,0.5);
  min-width: 160px;
  transform: translate(-50%, -110%);
  white-space: nowrap;
  z-index: 5;
}
.timeline-tooltip dl { display: grid; grid-template-columns: auto auto; gap: 1px 8px; margin: 4px 0 0 0; }
.timeline-tooltip dt::before {
  content: "";
  display: inline-block;
  width: 7px; height: 7px;
  margin-right: 5px;
  border-radius: 2px;
  background: var(--tier-color);
  vertical-align: middle;
}
.timeline-tooltip dt[data-t="active"] { --tier-color: var(--c-active); }
.timeline-tooltip dt[data-t="locked"] { --tier-color: var(--c-locked); }
.timeline-tooltip dt[data-t="delete"] { --tier-color: var(--c-delete); }
.timeline-tooltip dt[data-t="purged"] { --tier-color: var(--c-purged); }
.timeline-tooltip dd { margin: 0; text-align: right; }

.timeline-axis text {
  fill: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 9.5px;
}
.timeline-grid line { stroke: var(--border); stroke-dasharray: 2 4; }
.timeline-now {
  fill: var(--c-firewall);
  font-family: var(--font-mono);
  font-size: 10px;
}

/* =====================================================
   Footer
   ===================================================== */
footer {
  grid-area: foot;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 12px 18px;
  font-size: 12px;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.footer-meta { font-family: var(--font-mono); font-size: 11.5px; color: var(--text-dim); }

/* =====================================================
   Modal dialogs
   ===================================================== */
.modal {
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  max-width: 580px;
  width: calc(100vw - 32px);
  padding: 0;
  box-shadow: 0 30px 60px rgba(0,0,0,0.55);
}
.modal::backdrop {
  background: rgba(8,12,30,0.7);
  backdrop-filter: blur(4px);
}
.modal-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}
.modal-body { padding: 16px 18px 18px; }
.modal-body h3 {
  margin-top: 14px;
  margin-bottom: 4px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}
.modal-body p { margin: 4px 0 8px; font-size: 13px; color: var(--text); }
.modal-body ul li { padding: 3px 0; font-size: 13px; color: var(--text); }
.modal-body ul li .legend-chip { margin-right: 6px; }

.kbds li { display: flex; gap: 10px; align-items: center; }
kbd {
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--surface-3);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 4px;
  min-width: 30px;
  display: inline-block;
  text-align: center;
}

/* Item dialog body */
.item-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.item-detail .full { grid-column: 1 / -1; }
.detail-stat {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
}
.detail-stat dt {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin: 0;
}
.detail-stat dd {
  margin: 2px 0 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text);
}

.detail-actions {
  display: flex;
  gap: 8px;
  margin-top: 10px;
  flex-wrap: wrap;
}
.history-list {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-muted);
}
.history-list li {
  display: grid;
  grid-template-columns: 70px auto 1fr;
  gap: 8px;
  padding: 2px 0;
  border-bottom: 1px dashed var(--border);
}