/* Palworld Breeding Calculator — palworld.freaklabs.dev
   Light "paper & ink" theme matching the freaklabs Bill Tracker:
   warm off-white paper, white cards with 3px ink top borders, squared
   corners, Archivo + IBM Plex Mono, green/amber/rust accents. */

@font-face {
  font-family: 'Archivo';
  src: url('../assets/fonts/Archivo-Regular.woff2') format('woff2');
  font-weight: 100 900; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Mono';
  src: url('../assets/fonts/IBMPlexMono-Medium.woff2') format('woff2');
  font-weight: 500; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Mono';
  src: url('../assets/fonts/IBMPlexMono-SemiBold.woff2') format('woff2');
  font-weight: 600; font-style: normal; font-display: swap;
}

:root {
  /* bills.freaklabs.dev palette */
  --bg: #F6F7F4;              /* paper */
  --bg-deep: #FFFFFF;         /* inputs */
  --card: #FFFFFF;
  --card-2: #F2F4F1;          /* nested surfaces: chips, steps, pair rows */
  --card-hover: #EDF1EE;
  --border: #C9D2CD;
  --border-soft: #DDE3E0;
  --ink: #182732;
  --cyan: #2E7D5B;            /* primary accent (bills green) */
  --cyan-soft: #EAF4EF;
  --cyan-glow: rgba(46, 125, 91, .22);
  --cyan-dim: #5FA184;
  --teal: #2E7D5B;
  --yellow: #8A6D1F;          /* amber — target/child highlights */
  --yellow-soft: #FBF4DE;
  --text: #182732;
  --muted: #5C6B76;
  --faint: #8FA0AC;
  --purple: #6D3FA8;
  --blue: #2F6DA8;
  --gray: #5C6B76;
  --gold: #8A6D1F;
  --pink: #B05A85;
  --male: #3C6E9E;
  --female: #B05A85;
  --danger: #B0522F;          /* rust */
  --danger-soft: #F9EDE7;
  --radius: 0;
  --font-display: 'Archivo', 'Segoe UI', sans-serif;
  --font-body: 'Archivo', 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.45;
  min-height: 100vh;
}
img { max-width: 100%; }
button { font-family: inherit; cursor: pointer; }
input, select { font-family: inherit; }
::selection { background: #C5E0D2; }

/* ------------------------------------------------ scrollbars */
* { scrollbar-width: thin; scrollbar-color: #B9C4BE transparent; }
*::-webkit-scrollbar { width: 9px; height: 9px; }
*::-webkit-scrollbar-thumb { background: #B9C4BE; }
*::-webkit-scrollbar-track { background: transparent; }

/* ------------------------------------------------ header */
.site-header {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 22px; min-height: 52px;
  background: var(--ink);
  color: #fff;
  position: sticky; top: 0; z-index: 40;
}
.site-header .logo { width: 28px; height: 28px; flex: 0 0 auto; }
.site-title {
  font-family: var(--font-display);
  font-weight: 800; font-size: 17px; letter-spacing: .04em;
  text-transform: uppercase; margin: 0; white-space: nowrap; color: #fff;
}
.site-title .accent { color: #7FBFA2; }
.header-meta {
  margin-left: auto; color: #8FA0AC; font-size: 12px;
  font-family: var(--font-mono);
  display: flex; align-items: center; gap: 14px;
}
.help-btn {
  background: transparent; color: #8FA0AC;
  border: 1px solid #3C4E5C; border-radius: 0;
  width: 26px; height: 26px; font-size: 13px; line-height: 1;
  font-family: var(--font-mono);
  transition: color .15s, border-color .15s;
}
.help-btn:hover { color: #7FBFA2; border-color: #7FBFA2; }

.page { max-width: 1240px; margin: 0 auto; padding: 20px 18px 70px; }

/* ------------------------------------------------ mode switcher */
.mode-nav {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 10px; margin-bottom: 22px;
}
.mode-btn {
  position: relative;
  display: flex; align-items: center; justify-content: center; gap: 9px;
  padding: 13px 10px;
  background: var(--card); color: var(--muted);
  border: 1px solid var(--border-soft);
  border-top: 3px solid var(--border-soft);
  font-family: var(--font-mono); font-weight: 600;
  font-size: 12px; letter-spacing: .06em; text-transform: uppercase;
  transition: all .16s ease;
}
.mode-btn svg { width: 16px; height: 16px; flex: 0 0 auto; }
.mode-btn:hover { color: var(--ink); border-color: var(--border); border-top-color: var(--muted); }
.mode-btn.active {
  color: var(--cyan); background: var(--cyan-soft);
  border-color: var(--cyan);
  border-top: 3px solid var(--cyan);
}
.badge-new {
  position: absolute; top: -8px; right: -5px;
  background: var(--cyan); color: #fff;
  font-family: var(--font-mono);
  font-size: 9.5px; font-weight: 600; letter-spacing: .08em;
  padding: 2px 7px;
}

.mode-panel { display: none; animation: fadeUp .22s ease; }
.mode-panel.active { display: block; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

/* ------------------------------------------------ generic cards & bits */
.panel {
  background: var(--card);
  border: 1px solid var(--border-soft);
  border-top: 3px solid var(--ink);
  padding: 16px;
}
.panel-title {
  font-family: var(--font-mono); font-weight: 600;
  font-size: 11.5px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--muted); margin: 0 0 12px;
  display: flex; align-items: center; gap: 8px;
}
.count-badge {
  background: var(--card-2); border: 1px solid var(--border-soft);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 11px; padding: 1px 8px;
}

.rarity-pill {
  display: inline-block; font-size: 10px; font-weight: 600;
  font-family: var(--font-mono);
  letter-spacing: .05em; text-transform: uppercase;
  padding: 1.5px 7px;
}
.rarity-common { background: #EFF2F0; color: var(--gray); }
.rarity-rare { background: #E9F0FA; color: var(--blue); }
.rarity-epic { background: #F1EAFA; color: var(--purple); }
.rarity-legendary { background: var(--yellow-soft); color: var(--gold); }

.elem-stack {
  position: absolute; top: 4px; left: 4px;
  display: flex; flex-direction: column; gap: 3px; z-index: 2;
}
.elem-diamond {
  width: 17px; height: 17px; transform: rotate(45deg);
  background: #fff; border: 1px solid var(--border);
  border-radius: 3px; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 1px 2px rgba(24, 39, 50, .15);
}
.elem-diamond img {
  width: 13px; height: 13px; transform: rotate(-45deg); display: block;
}

.owned-badge {
  position: absolute; top: 4px; right: 4px; z-index: 2;
  background: var(--cyan); color: #fff;
  font-family: var(--font-mono);
  font-size: 9px; font-weight: 600; letter-spacing: .05em;
  padding: 1px 5px; text-transform: uppercase;
}

/* ------------------------------------------------ pal grid + toolbar */
.pal-toolbar {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  margin: 18px 0 12px;
}
.search-wrap { position: relative; flex: 1 1 220px; max-width: 340px; }
.search-wrap svg {
  position: absolute; left: 11px; top: 50%; transform: translateY(-50%);
  width: 15px; height: 15px; color: var(--faint); pointer-events: none;
}
.search-input {
  width: 100%; padding: 9px 12px 9px 34px;
  background: var(--bg-deep); color: var(--text);
  border: 1px solid var(--border);
  font-size: 14px; outline: none; transition: border-color .15s, box-shadow .15s;
}
.search-input:focus { border-color: var(--cyan); box-shadow: 0 0 0 3px var(--cyan-glow); }
.search-input::placeholder { color: var(--faint); }
.grid-count { color: var(--muted); font-size: 13px; font-family: var(--font-mono); white-space: nowrap; }
.grid-count b { color: var(--cyan); font-weight: 600; }
.sort-select {
  background: var(--bg-deep); color: var(--muted);
  border: 1px solid var(--border);
  padding: 8px 10px; font-size: 13px; outline: none;
}
.sort-select:focus { border-color: var(--cyan); }

.adding-toggle { display: flex; gap: 6px; align-items: center; }
.adding-toggle .lbl { color: var(--faint); font-size: 12px; font-family: var(--font-mono); margin-right: 2px; }
.pill-toggle {
  background: var(--card); color: var(--muted);
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  padding: 6px 14px; font-size: 11.5px; font-weight: 600;
  letter-spacing: .05em; text-transform: uppercase; transition: all .14s;
}
.pill-toggle.active-target { color: var(--yellow); border-color: var(--yellow); background: var(--yellow-soft); }
.pill-toggle.active-owned { color: var(--teal); border-color: var(--teal); background: var(--cyan-soft); }

.pal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(102px, 1fr));
  gap: 9px;
}
.pal-card {
  position: relative;
  background: var(--card); border: 1px solid var(--border-soft);
  padding: 10px 6px 8px;
  text-align: center;
  transition: transform .12s ease, border-color .12s, background .12s, box-shadow .12s;
  -webkit-tap-highlight-color: transparent;
}
.pal-card:hover {
  transform: translateY(-2px);
  border-color: var(--cyan); background: #FDFEFD;
  box-shadow: 0 2px 8px rgba(24, 39, 50, .10);
}
.pal-card:active { transform: scale(.97); }
.pal-card img.thumb {
  width: 58px; height: 58px; border-radius: 50%;
  background: var(--card-2); border: 1px solid var(--border-soft);
  object-fit: cover;
}
.pal-card .nm {
  display: block; font-size: 12px; font-weight: 600; margin: 6px 0 4px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.pal-card .no { color: var(--faint); font-size: 10px; font-family: var(--font-mono); display: block; margin-bottom: 3px; }

/* ------------------------------------------------ MODE A — calculator */
.calc-row {
  display: flex; align-items: stretch; justify-content: center;
  gap: 14px; flex-wrap: wrap; margin-bottom: 6px;
}
.slot {
  position: relative;
  width: 178px; min-height: 168px;
  background: var(--card);
  border: 2px dashed var(--border);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 6px; padding: 14px 10px 12px;
  cursor: pointer; transition: all .15s ease;
}
.slot .hint { color: var(--faint); font-size: 12.5px; }
.slot .slot-label {
  font-family: var(--font-mono); font-size: 10.5px; font-weight: 600;
  letter-spacing: .1em; text-transform: uppercase; color: var(--muted);
}
.slot.filled { border-style: solid; border-color: var(--cyan-dim); }
.slot.active-slot {
  border-color: var(--cyan); border-style: solid;
  box-shadow: 0 0 0 3px var(--cyan-glow);
}
.slot img.thumb {
  width: 74px; height: 74px; border-radius: 50%;
  background: var(--card-2); border: 1px solid var(--border-soft);
}
.slot .nm { font-weight: 600; font-size: 14px; }
.gender-icon {
  position: absolute; top: 8px; font-size: 15px; font-weight: 700;
  opacity: .8;
}
.gender-icon.m { left: 11px; color: var(--male); }
.gender-icon.f { right: 11px; color: var(--female); }
.slot .clear-x {
  position: absolute; bottom: 7px; right: 9px;
  background: none; border: none; color: var(--faint); font-size: 12px;
  padding: 2px 4px;
}
.slot .clear-x:hover { color: var(--danger); }

.calc-op {
  align-self: center;
  font-family: var(--font-mono); font-size: 24px; font-weight: 600;
  color: var(--faint); padding: 0 2px; user-select: none;
}
.slot.result-box {
  cursor: default;
  border: 2px solid var(--yellow);
  background: linear-gradient(180deg, rgba(138, 109, 31, .05), transparent 55%), var(--card);
  box-shadow: 0 0 0 3px rgba(138, 109, 31, .10);
}
.slot.result-box.empty { border-style: dashed; border-color: var(--border); box-shadow: none; background: var(--card); }
.result-multi { display: flex; flex-direction: column; gap: 8px; align-items: center; }
.result-note { color: var(--muted); font-size: 11px; }
.calc-hint { text-align: center; color: var(--faint); font-size: 12.5px; margin: 10px 0 0; }

/* ------------------------------------------------ MODE B — combinations */
.mode-b-layout { display: grid; grid-template-columns: 300px 1fr; gap: 16px; }
.target-card {
  display: flex; align-items: center; gap: 12px;
  background: var(--cyan-soft); border: 1px solid var(--cyan);
  border-top: 3px solid var(--cyan);
  padding: 12px;
}
.target-card img { width: 56px; height: 56px; border-radius: 50%; background: #fff; }
.target-card .nm { font-weight: 600; font-size: 15px; }
.target-card .sub { color: var(--muted); font-size: 12px; }
.target-empty {
  border: 2px dashed var(--border);
  color: var(--faint); text-align: center; padding: 22px 12px; font-size: 13px;
  background: var(--card);
}

.tabs { display: flex; gap: 8px; margin-bottom: 12px; }
.tab-btn {
  background: var(--card); color: var(--muted);
  border: 1px solid var(--border-soft);
  font-family: var(--font-mono);
  padding: 8px 15px; font-size: 12px; font-weight: 600;
  letter-spacing: .04em; text-transform: uppercase;
  transition: all .14s;
}
.tab-btn.active { color: var(--cyan); border-color: var(--cyan); background: var(--cyan-soft); }

.combo-rows { display: flex; flex-direction: column; gap: 7px; }
.combo-row {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  background: var(--card); border: 1px solid var(--border-soft);
  padding: 8px 12px;
  transition: border-color .12s, background .12s;
}
.combo-row:hover { border-color: var(--border); background: #FDFEFD; }
.combo-pal { display: inline-flex; align-items: center; gap: 7px; min-width: 0; }
.combo-pal img { width: 34px; height: 34px; border-radius: 50%; background: var(--card-2); flex: 0 0 auto; }
.combo-pal .nm { font-size: 13px; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.combo-pal.child .nm { color: var(--cyan); font-weight: 600; }
.combo-op { color: var(--faint); font-family: var(--font-mono); font-weight: 600; font-size: 14px; }
.combo-note { color: var(--gold); font-size: 11px; margin-left: 4px; }
.show-more-btn {
  margin-top: 10px; width: 100%;
  background: var(--card); color: var(--cyan);
  border: 1px solid var(--border);
  font-family: var(--font-mono); text-transform: uppercase; letter-spacing: .05em;
  padding: 9px; font-size: 12px; font-weight: 600;
}
.show-more-btn:hover { border-color: var(--cyan); background: var(--cyan-soft); }
.empty-msg { color: var(--faint); font-size: 13.5px; text-align: center; padding: 26px 10px; }

/* ------------------------------------------------ MODE C — path finder */
.pf-layout { display: grid; grid-template-columns: 340px 1fr; gap: 16px; margin-bottom: 4px; }
.pf-left { display: flex; flex-direction: column; gap: 14px; }

.pf-target-slot {
  border: 2px dashed var(--border);
  background: var(--card);
  padding: 14px; text-align: center; cursor: pointer;
  transition: all .15s;
  position: relative;
}
.pf-target-slot .hint { color: var(--faint); font-size: 13px; }
.pf-target-slot.filled {
  border-style: solid; border-color: var(--yellow);
  background: linear-gradient(180deg, rgba(138, 109, 31, .05), transparent 60%), var(--card);
}
.pf-target-slot .pal-line { display: flex; align-items: center; gap: 10px; justify-content: center; }
.pf-target-slot img { width: 48px; height: 48px; border-radius: 50%; background: var(--card-2); }
.pf-target-slot .nm { font-weight: 600; }

.owned-box { min-height: 90px; }
.owned-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.owned-chip {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--card-2); border: 1px solid var(--border-soft);
  padding: 3px 9px 3px 4px; font-size: 12.5px;
  transition: border-color .12s;
}
.owned-chip img { width: 22px; height: 22px; border-radius: 50%; background: #fff; }
.owned-chip button {
  background: none; border: none; color: var(--faint);
  font-size: 13px; padding: 0 1px; line-height: 1;
}
.owned-chip button:hover { color: var(--danger); }
.owned-empty { color: var(--faint); font-size: 12.5px; padding: 6px 2px; }
.owned-actions { display: flex; gap: 8px; margin-top: 12px; flex-wrap: wrap; }

.btn {
  background: var(--card); color: var(--ink);
  border: 1px solid var(--ink);
  font-family: var(--font-mono);
  padding: 8px 14px; font-size: 12px; font-weight: 600;
  letter-spacing: .06em; text-transform: uppercase;
  transition: all .14s;
}
.btn:hover { background: var(--cyan-soft); border-color: var(--cyan); color: var(--cyan); }
.btn.primary {
  background: var(--ink); color: #fff; border-color: var(--ink);
}
.btn.primary:hover { background: #2A3E4E; color: #fff; }
.btn.small { padding: 5px 10px; font-size: 11px; }
.btn.danger-ghost { border-color: var(--border); color: var(--muted); }
.btn.danger-ghost:hover { border-color: var(--danger); color: var(--danger); background: var(--danger-soft); }
.btn:disabled { opacity: .45; cursor: not-allowed; }

.sync-status { font-size: 12px; color: var(--faint); margin-top: 8px; min-height: 16px; }
.sync-status .code-tag {
  color: var(--cyan); font-family: var(--font-mono); letter-spacing: .08em;
  font-weight: 600;
}

.plan-panel { min-height: 260px; }
.plan-steps { display: flex; flex-direction: column; gap: 9px; }
.plan-step {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  background: var(--card-2); border: 1px solid var(--border-soft);
  padding: 10px 12px;
  animation: fadeUp .25s ease both;
}
.plan-step .step-no {
  font-family: var(--font-mono); color: var(--cyan);
  font-size: 11px; font-weight: 600; letter-spacing: .05em;
  background: var(--cyan-soft); border: 1px solid var(--cyan-dim);
  padding: 3px 8px; flex: 0 0 auto;
}
.plan-msg { padding: 18px 6px; color: var(--muted); font-size: 14px; text-align: center; }
.plan-msg.ok { color: var(--teal); }
.plan-msg.bad { color: var(--danger); }
.plan-meta { color: var(--faint); font-size: 12px; font-family: var(--font-mono); margin-top: 10px; text-align: right; }

/* ------------------------------------------------ MODE D — breeding tree */
.tree-layout { display: grid; grid-template-columns: 320px 1fr; gap: 16px; }
.tree-sidebar { max-height: 640px; display: flex; flex-direction: column; }
.tree-sidebar .search-wrap { flex: 0 0 auto; max-width: none; }
.pair-list { overflow-y: auto; display: flex; flex-direction: column; gap: 6px; margin-top: 10px; flex: 1; }
.pair-item {
  display: flex; align-items: center; gap: 6px;
  background: var(--card-2); border: 1px solid var(--border-soft);
  padding: 7px 9px; cursor: pointer;
  transition: border-color .12s, background .12s;
}
.pair-item:hover { border-color: var(--cyan); background: var(--cyan-soft); }
.pair-item img { width: 28px; height: 28px; border-radius: 50%; background: #fff; }
.pair-item .nm { font-size: 12px; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 92px; }
.pair-item .plus { color: var(--faint); font-family: var(--font-mono); font-weight: 600; font-size: 12px; }
.pair-item .own-dot {
  width: 7px; height: 7px; background: var(--teal); border-radius: 50%;
  flex: 0 0 auto;
}

.tree-canvas {
  overflow: auto; padding: 24px 14px 30px;
  min-height: 480px;
}
.tree-canvas-inner { display: flex; justify-content: center; min-width: min-content; }

.tnode { display: flex; flex-direction: column; align-items: center; }
.tnode-card {
  position: relative;
  background: var(--card); border: 1.5px solid var(--border);
  padding: 8px 12px 7px;
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  cursor: pointer; min-width: 96px;
  transition: border-color .13s, box-shadow .13s;
}
.tnode-card:hover { border-color: var(--cyan); }
.tnode-card.selected {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px var(--cyan-glow);
}
.tnode-card.root { border-color: var(--yellow); }
.tnode-card.root.selected { box-shadow: 0 0 0 3px rgba(138, 109, 31, .18); }
.tnode-card img { width: 44px; height: 44px; border-radius: 50%; background: var(--card-2); }
.tnode-card .nm { font-size: 12px; font-weight: 600; white-space: nowrap; }
.tnode-card .owned-badge { position: static; margin-top: 2px; }
.tnode-expand {
  margin-top: 6px;
  background: var(--card); color: var(--cyan);
  border: 1px dashed var(--cyan-dim);
  width: 26px; height: 22px; font-size: 14px; font-weight: 700; line-height: 1;
  transition: all .13s;
}
.tnode-expand:hover { background: var(--cyan-soft); border-style: solid; }

/* connectors: children row under a node */
.tnode-children { display: flex; gap: 26px; position: relative; padding-top: 26px; }
.tnode-children::before {          /* vertical stem from parent */
  content: ''; position: absolute; top: 0; left: 50%;
  width: 1.5px; height: 13px; background: var(--border); transform: translateX(-50%);
}
.tnode-children > .tnode { position: relative; padding-top: 13px; }
.tnode-children > .tnode::before { /* vertical stem to each child */
  content: ''; position: absolute; top: 0; left: 50%;
  width: 1.5px; height: 13px; background: var(--border); transform: translateX(-50%);
}
.tnode-children > .tnode:first-child::after,
.tnode-children > .tnode:last-child::after { /* horizontal elbow */
  content: ''; position: absolute; top: 0; height: 1.5px; background: var(--border);
}
.tnode-children > .tnode:first-child::after { left: 50%; right: -13px; }
.tnode-children > .tnode:last-child::after { right: 50%; left: -13px; }

.tree-toolbar { display: flex; gap: 8px; align-items: center; margin-bottom: 12px; flex-wrap: wrap; }
.tree-hint { color: var(--faint); font-size: 12.5px; }

/* ------------------------------------------------ modal + toast */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(24, 39, 50, .45);
  display: none; align-items: center; justify-content: center; z-index: 90;
  padding: 20px;
}
.modal-backdrop.open { display: flex; }
.modal {
  background: var(--card); border: 1px solid var(--border-soft);
  border-top: 3px solid var(--ink);
  max-width: 460px; width: 100%;
  padding: 22px; animation: fadeUp .18s ease;
  max-height: 85vh; overflow-y: auto;
  box-shadow: 0 14px 40px rgba(24, 39, 50, .22);
}
.modal h3 {
  margin: 0 0 10px; font-family: var(--font-display);
  font-weight: 800; font-size: 15px; letter-spacing: .02em;
  text-transform: uppercase; color: var(--ink);
}
.modal p { color: var(--muted); font-size: 13.5px; margin: 8px 0; }
.modal .code-display {
  font-family: var(--font-mono); font-size: 26px; font-weight: 600;
  letter-spacing: .22em; color: var(--cyan); text-align: center;
  background: var(--cyan-soft); border: 1px solid var(--cyan-dim);
  padding: 13px 8px; margin: 14px 0 10px;
  user-select: all;
}
.modal .share-url {
  font-size: 12px; color: var(--muted); word-break: break-all;
  font-family: var(--font-mono);
  background: var(--bg); border: 1px solid var(--border-soft);
  padding: 8px 10px; margin-bottom: 12px;
}
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; flex-wrap: wrap; }
.modal input.code-input {
  width: 100%; padding: 10px 12px; font-size: 16px;
  font-family: var(--font-mono); letter-spacing: .18em; text-transform: uppercase;
  background: var(--bg-deep); color: var(--text);
  border: 1px solid var(--border); outline: none;
  text-align: center; margin: 8px 0 12px;
}
.modal input.code-input:focus { border-color: var(--cyan); }

.toast-wrap {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; gap: 8px; z-index: 120; pointer-events: none;
}
.toast {
  background: var(--ink); border: 1px solid var(--ink);
  color: #fff; padding: 10px 18px;
  font-size: 13px; font-family: var(--font-mono);
  box-shadow: 0 6px 22px rgba(24, 39, 50, .28);
  animation: fadeUp .2s ease;
}
.toast.err { background: var(--danger); border-color: var(--danger); }

.footer-note {
  margin-top: 36px; text-align: center; color: var(--faint); font-size: 12px;
}
.footer-note a { color: var(--muted); text-decoration: none; border-bottom: 1px solid var(--border); }
.footer-note a:hover { color: var(--cyan); border-color: var(--cyan); }

/* ------------------------------------------------ responsive */
@media (max-width: 900px) {
  .mode-b-layout, .pf-layout, .tree-layout { grid-template-columns: 1fr; }
  .tree-sidebar { max-height: 320px; }
  .mode-nav { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .page { padding: 14px 10px 60px; }
  .site-header { padding: 10px 14px; }
  .site-title { font-size: 15px; }
  .header-meta .last-update { display: none; }
  .calc-row { gap: 8px; }
  .slot { width: 46%; min-width: 140px; min-height: 150px; }
  .slot.result-box { width: 100%; min-height: 130px; }
  .calc-op { font-size: 20px; }
  .pal-grid { grid-template-columns: repeat(auto-fill, minmax(88px, 1fr)); gap: 7px; }
  .mode-btn { font-size: 10.5px; padding: 11px 6px; gap: 6px; }
}