/* ========================================================================
   Loom — soft neutral editorial workflow editor
   Type: Fraunces (display) · Inter (UI) · JetBrains Mono (block bodies)
   ======================================================================== */

:root {
  /* pure white palette */
  --paper: #ffffff;
  --paper-2: #f6f5f2;
  --paper-3: #eeece7;
  --ink: #1a1715;
  --ink-2: #3a332d;
  --ink-3: #6b6258;
  --ink-4: #a29787;
  --rule: #e5e1d8;
  --rule-2: #d0cabb;

  /* category accents — all oklch, same chroma + lightness, varying hue */
  --accent-events: oklch(0.62 0.11 30);   /* terracotta */
  --accent-models: oklch(0.62 0.11 255);  /* indigo */
  --accent-tools:  oklch(0.62 0.11 165);  /* teal */
  --accent-logic:  oklch(0.62 0.11 95);   /* olive */
  --accent-memory: oklch(0.62 0.11 305);  /* plum */
  --accent-output: oklch(0.62 0.11 55);   /* umber */
  --accent-types:  oklch(0.62 0.11 210);  /* sky/azure */

  --f-display: "Fraunces", "Iowan Old Style", Georgia, serif;
  --f-ui: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --f-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --r-sm: 4px;
  --r: 6px;
  --r-lg: 10px;

  --shadow-1: 0 1px 0 rgba(26, 23, 21, 0.04);
  --shadow-2: 0 1px 2px rgba(26, 23, 21, 0.06), 0 2px 8px rgba(26, 23, 21, 0.04);
  --shadow-3: 0 2px 8px rgba(26, 23, 21, 0.08), 0 12px 32px rgba(26, 23, 21, 0.08);
}

[data-theme="dark"] {
  --paper: #1a1815;
  --paper-2: #211e1a;
  --paper-3: #2a2621;
  --ink: #efeae1;
  --ink-2: #d4cec2;
  --ink-3: #a39c8e;
  --ink-4: #6b6558;
  --rule: #332f28;
  --rule-2: #403b32;

  --accent-events: oklch(0.72 0.12 30);
  --accent-models: oklch(0.72 0.12 255);
  --accent-tools:  oklch(0.72 0.12 165);
  --accent-logic:  oklch(0.72 0.12 95);
  --accent-memory: oklch(0.72 0.12 305);
  --accent-output: oklch(0.72 0.12 55);
  --accent-types:  oklch(0.72 0.12 210);

  --shadow-1: 0 1px 0 rgba(0, 0, 0, 0.3);
  --shadow-2: 0 1px 2px rgba(0, 0, 0, 0.4), 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-3: 0 2px 8px rgba(0, 0, 0, 0.5), 0 12px 32px rgba(0, 0, 0, 0.4);
}

* { box-sizing: border-box; }
html, body, #root { height: 100%; margin: 0; }
body {
  font-family: var(--f-ui);
  background: var(--paper);
  color: var(--ink);
  font-size: 14px;
  line-height: 1.5;
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
}

button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input { font-family: inherit; color: inherit; }

.app {
  display: grid;
  grid-template-rows: 52px 1fr;
  height: 100vh;
  background: var(--paper);
}

/* ---------- Topbar ---------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 0 20px;
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
  position: relative;
  z-index: 5;
}
.brand { display: flex; align-items: baseline; gap: 8px; }
.brand-mark {
  font-family: var(--f-display);
  font-size: 20px;
  color: var(--accent-models);
  line-height: 1;
  transform: translateY(2px);
}
.brand-name {
  font-family: var(--f-display);
  font-size: 20px;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.brand-sub {
  font-size: 11px;
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink-3);
  font-size: 13px;
  margin-left: 16px;
}
.crumbs .sep { color: var(--ink-4); }
.crumbs .cur { color: var(--ink); font-family: var(--f-mono); font-size: 12px; }
.topbar-actions {
  margin-left: auto;
  display: flex;
  gap: 6px;
  align-items: center;
}

/* ---------- Buttons ---------- */
.btn {
  font-size: 12.5px;
  padding: 6px 12px;
  border-radius: var(--r-sm);
  border: 1px solid transparent;
  color: var(--ink-2);
  transition: background 0.12s, color 0.12s, border-color 0.12s;
  letter-spacing: 0.01em;
}
.btn.ghost:hover { background: var(--paper-2); }
.btn.primary {
  background: var(--ink);
  color: var(--paper);
  font-weight: 500;
}
.btn.primary:hover { background: var(--ink-2); }
.btn.run {
  background: var(--ink);
  color: var(--paper);
  font-weight: 500;
  padding: 6px 14px;
}
.btn.run:hover { background: var(--ink-2); }
.btn.stop {
  background: var(--accent-events);
  color: white;
  font-weight: 500;
}

/* Slot selection pills */
.slot-pills {
  display: flex;
  gap: 4px;
  background: var(--paper-2);
  padding: 3px;
  border-radius: var(--r-sm);
  border: 1px solid var(--rule);
}
.btn.pill {
  font-size: 11px;
  font-family: var(--f-mono);
  padding: 4px 10px;
  border-radius: 4px;
  color: var(--ink-3);
  background: transparent;
}
.btn.pill:hover {
  color: var(--ink);
  background: rgba(0,0,0,0.03);
}
.btn.pill.active {
  background: var(--paper);
  color: var(--ink);
  box-shadow: var(--shadow-1);
  font-weight: 600;
}

.sep-v {
  width: 1px;
  height: 24px;
  background: var(--rule);
  margin: 0 4px;
}

.btn.loading {
  opacity: 0.7;
  cursor: wait;
}

/* ---------- Workbench layout ---------- */
.workbench {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 0;
}

/* ---------- Sidebar ---------- */
.sidebar {
  border-right: 1px solid var(--rule);
  background: var(--paper);
  display: grid;
  grid-template-rows: auto 1fr;
  min-height: 0;
}
.sidebar-head {
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--rule);
}
.eyebrow {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-3);
  margin-bottom: 4px;
}
.sidebar-title {
  font-family: var(--f-display);
  font-size: 26px;
  font-weight: 400;
  margin: 0 0 6px;
  letter-spacing: -0.02em;
}
.sidebar-sub {
  font-size: 12.5px;
  color: var(--ink-3);
  line-height: 1.45;
  margin-bottom: 14px;
  max-width: 32ch;
}
.search-wrap { position: relative; }
.search {
  width: 100%;
  padding: 8px 10px 8px 28px;
  border: 1px solid var(--rule);
  background: var(--paper-2);
  border-radius: var(--r-sm);
  font-size: 13px;
  outline: none;
  transition: border-color 0.12s;
}
.search:focus { border-color: var(--ink-3); }
.search-icon {
  position: absolute;
  left: 9px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--ink-4);
  font-size: 14px;
}

.sidebar-scroll {
  overflow-y: auto;
  padding: 8px 0 24px;
}

.palette-cat + .palette-cat { margin-top: 4px; }
.palette-cat-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 20px 6px;
}
.palette-cat-rule {
  width: 16px;
  height: 2px;
  border-radius: 1px;
}
.palette-cat-name {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-2);
  font-weight: 500;
}
.palette-cat-count {
  font-family: var(--f-mono);
  font-size: 10.5px;
  color: var(--ink-4);
  margin-left: auto;
}
.palette-list {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 0 10px;
}
.pal-block {
  position: relative;
  display: grid;
  grid-template-columns: 3px 16px 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 9px 10px 9px 10px;
  font-size: 13px;
  background: transparent;
  border-radius: var(--r-sm);
  cursor: grab;
  transition: background 0.12s;
  user-select: none;
}
.pal-block:hover { background: var(--paper-2); }
.pal-block:active { cursor: grabbing; }
.pal-block-rule {
  width: 3px;
  height: 20px;
  border-radius: 2px;
  align-self: center;
}
.pal-block-glyph {
  font-family: var(--f-mono);
  font-size: 14px;
  line-height: 1;
  text-align: center;
}
.pal-block-label {
  color: var(--ink);
  font-family: var(--f-mono);
  font-size: 12.5px;
}
.pal-block-grip {
  color: var(--ink-4);
  font-size: 11px;
  opacity: 0;
  transition: opacity 0.12s;
}
.pal-block:hover .pal-block-grip { opacity: 1; }
.empty-pal {
  padding: 20px;
  color: var(--ink-3);
  font-size: 13px;
  text-align: center;
}

/* ---------- Stage (canvas + console) ---------- */
.stage {
  display: grid;
  grid-template-rows: 1fr 260px;
  min-height: 0;
}

/* ---------- Canvas ---------- */
.canvas {
  position: relative;
  overflow-y: auto;
  background: var(--paper);
  padding: 48px 64px 80px;
  transition: background 0.15s;
}
.canvas.is-over { background: var(--paper-2); }
.canvas-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to bottom, var(--rule) 1px, transparent 1px);
  background-size: 100% 28px;
  opacity: 0.4;
  pointer-events: none;
  z-index: 0;
}

.canvas-chrome {
  position: relative;
  max-width: 640px;
  margin: 0 auto 32px;
  z-index: 1;
}
.canvas-eyebrow {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-3);
  margin-bottom: 6px;
}
.canvas-title {
  font-family: var(--f-display);
  font-size: 38px;
  font-weight: 400;
  letter-spacing: -0.025em;
  margin: 0 0 10px;
  line-height: 1.1;
}
.canvas-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--ink-3);
}
.canvas-meta .dot { color: var(--ink-4); }
.status-chip {
  font-family: var(--f-mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 2px 7px;
  border: 1px solid var(--rule);
  border-radius: 3px;
  color: var(--ink-2);
  background: var(--paper-2);
}

.stack {
  position: relative;
  max-width: 640px;
  margin: 0 auto;
  z-index: 1;
}

/* drop gaps between blocks */
.drop-gap {
  height: 14px;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: height 0.18s;
}
.drop-gap.has-connector::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--ink-4);
  opacity: 0.4;
}
.drop-gap.is-active {
  height: 48px;
}
.drop-gap.is-active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  transform: translateY(-50%);
  background: var(--ink);
  border-radius: 1px;
}
.insert-mark {
  position: relative;
  z-index: 2;
  background: var(--paper);
  padding: 2px 10px;
  font-family: var(--f-mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink);
  border: 1px solid var(--ink);
  border-radius: 2px;
}

/* ---------- Flow blocks (typographic cards) ---------- */
.flow-block {
  position: relative;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: var(--r);
  padding: 14px 18px 14px 22px;
  box-shadow: var(--shadow-1);
  cursor: pointer;
  transition: border-color 0.12s, box-shadow 0.12s, transform 0.12s, background 0.12s;
}
.flow-block:hover { border-color: var(--rule-2); box-shadow: var(--shadow-2); }
.flow-block.is-selected {
  border-color: var(--ink);
  box-shadow: var(--shadow-2);
}
.flow-block.is-active {
  background: var(--paper);
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in oklch, var(--accent) 20%, transparent), var(--shadow-2);
}
.fb-rule {
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 10px;
  width: 3px;
  background: var(--accent);
  border-radius: 0 2px 2px 0;
}
.fb-head {
  display: grid;
  grid-template-columns: auto auto auto 1fr auto;
  align-items: center;
  gap: 10px;
}
.fb-index {
  font-family: var(--f-mono);
  font-size: 10.5px;
  color: var(--ink-4);
  letter-spacing: 0.05em;
}
.fb-glyph {
  font-family: var(--f-mono);
  color: var(--accent);
  font-size: 14px;
  line-height: 1;
}
.fb-cat {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-3);
}
.fb-label {
  font-family: var(--f-display);
  font-weight: 400;
  font-size: 18px;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--ink);
  line-height: 1.2;
}
.fb-remove {
  width: 22px;
  height: 22px;
  font-size: 16px;
  line-height: 1;
  color: var(--ink-4);
  border-radius: 3px;
  transition: background 0.12s, color 0.12s;
}
.fb-remove:hover { background: var(--paper-3); color: var(--ink); }

.fb-params {
  margin: 10px 0 0;
  padding: 10px 0 0;
  border-top: 1px dashed var(--rule);
  display: grid;
  gap: 4px;
}
.fb-param {
  display: grid;
  grid-template-columns: 100px 1fr;
  align-items: baseline;
  gap: 10px;
}
.fb-param dt {
  font-family: var(--f-mono);
  font-size: 11.5px;
  color: var(--ink-3);
  letter-spacing: 0.02em;
  margin: 0;
}
.fb-param dd { margin: 0; }
.fb-param-input {
  width: 100%;
  font-family: var(--f-mono);
  font-size: 12.5px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 3px;
  padding: 3px 6px;
  color: var(--ink);
  transition: background 0.12s, border-color 0.12s;
}
.fb-param-input:hover { background: var(--paper-3); }
.fb-param-input:focus {
  outline: none;
  background: var(--paper);
  border-color: var(--rule-2);
}

.fb-param-slider-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 4px 0;
}

.fb-param-slider {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: var(--rule);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

.fb-param-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  background: var(--accent);
  border-radius: 50%;
  border: 2px solid var(--paper);
  box-shadow: var(--shadow-1);
  cursor: pointer;
  transition: transform 0.1s ease;
}

.fb-param-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.fb-param-val-badge {
  font-family: var(--f-mono);
  font-size: 11px;
  font-weight: 600;
  background: var(--paper-3);
  color: var(--accent);
  padding: 2px 6px;
  border-radius: 4px;
  min-width: 24px;
  text-align: center;
}

/* kind variants (start/end get a different silhouette) */
.flow-block.kind-start {
  border-radius: 24px var(--r) var(--r) var(--r);
}
.flow-block.kind-end {
  border-radius: var(--r) var(--r) 24px var(--r);
}
.flow-block.kind-branch .fb-label::after {
  content: " ◇";
  color: var(--ink-4);
  font-size: 13px;
}

/* empty canvas */
.empty-canvas {
  text-align: center;
  padding: 60px 20px;
  color: var(--ink-3);
}
.empty-rule {
  width: 40px;
  height: 1px;
  background: var(--rule-2);
  margin: 0 auto 20px;
}
.empty-title {
  font-family: var(--f-display);
  font-size: 22px;
  color: var(--ink-2);
  margin-bottom: 6px;
}
.empty-body { font-size: 13px; }
.empty-body em { font-style: italic; color: var(--ink); }

/* ---------- Console ---------- */
.console {
  border-top: 1px solid var(--rule);
  background: var(--paper-2);
  display: grid;
  grid-template-rows: auto 1fr;
  min-height: 0;
}
.console-head {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 20px;
  border-bottom: 1px solid var(--rule);
}
.console-title-wrap { display: flex; align-items: baseline; gap: 8px; }
.console-eyebrow {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-3);
}
.console-title {
  font-family: var(--f-display);
  font-weight: 400;
  font-size: 16px;
  margin: 0;
  letter-spacing: -0.01em;
}
.console-tabs { display: flex; gap: 2px; margin-left: 12px; }
.tab {
  padding: 4px 10px;
  font-size: 11.5px;
  color: var(--ink-3);
  border-radius: 3px;
  font-family: var(--f-mono);
  letter-spacing: 0.02em;
}
.tab:hover { color: var(--ink); background: var(--paper-3); }
.tab.is-on { color: var(--ink); background: var(--paper-3); }
.console-actions { margin-left: auto; display: flex; gap: 6px; }

.console-body {
  overflow-y: auto;
  padding: 12px 20px 20px;
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.7;
}
.log-empty {
  color: var(--ink-3);
  font-family: var(--f-ui);
  font-size: 13px;
  padding: 16px 0;
}
.log-empty kbd {
  font-family: var(--f-mono);
  font-size: 11px;
  padding: 1px 6px;
  border: 1px solid var(--rule);
  border-radius: 3px;
  background: var(--paper);
  color: var(--ink);
}
.log-line {
  display: grid;
  grid-template-columns: 70px 100px 1fr;
  gap: 10px;
  padding: 1px 0;
}
.log-time { color: var(--ink-4); }
.log-tag {
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 10.5px;
  padding-top: 2px;
}
.log-msg { color: var(--ink); }
.log-line.level-ok .log-tag { color: var(--accent-tools); }
.log-line.level-ok .log-msg { color: var(--ink); font-weight: 500; }
.log-line.level-warn .log-tag { color: var(--accent-events); }
.log-line.level-info .log-msg { color: var(--ink-2); }

/* ---------- Tweaks panel ---------- */
.tweaks {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 240px;
  background: var(--paper);
  border: 1px solid var(--rule-2);
  border-radius: var(--r);
  box-shadow: var(--shadow-3);
  padding: 14px 16px 16px;
  z-index: 100;
}
.tweaks-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.tweaks-eyebrow {
  font-family: var(--f-display);
  font-size: 15px;
  letter-spacing: -0.01em;
}
.tweaks-close {
  width: 22px;
  height: 22px;
  font-size: 18px;
  line-height: 1;
  color: var(--ink-3);
  border-radius: 3px;
}
.tweaks-close:hover { background: var(--paper-2); color: var(--ink); }
.tweaks-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}
.tweaks-row label {
  font-size: 12px;
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.seg {
  display: flex;
  border: 1px solid var(--rule);
  border-radius: 4px;
  overflow: hidden;
  background: var(--paper-2);
}
.seg button {
  padding: 4px 10px;
  font-size: 11.5px;
  color: var(--ink-3);
  font-family: var(--f-mono);
  letter-spacing: 0.02em;
}
.seg button.on { background: var(--ink); color: var(--paper); }

/* ---------- Scrollbars ---------- */
.sidebar-scroll::-webkit-scrollbar,
.canvas::-webkit-scrollbar,
.console-body::-webkit-scrollbar { width: 10px; height: 10px; }
.sidebar-scroll::-webkit-scrollbar-thumb,
.canvas::-webkit-scrollbar-thumb,
.console-body::-webkit-scrollbar-thumb {
  background: var(--rule-2);
  border-radius: 10px;
  border: 2px solid var(--paper);
}
.sidebar-scroll::-webkit-scrollbar-track,
.canvas::-webkit-scrollbar-track,
.console-body::-webkit-scrollbar-track { background: transparent; }