/* ═══════════════════════════════════════════════════════════════════════════
   K·MAP SIMPLIFIER — STYLESHEET
   Aesthetic: Terminal-Noir / Cyberpunk Academic
   Fonts: Syne (display) + JetBrains Mono (code) + Space Mono (mono accents)
   ═══════════════════════════════════════════════════════════════════════════ */

:root {
  --bg:         #0B0C10;
  --bg2:        #0F1117;
  --surface:    #141720;
  --surface2:   #1C2030;
  --border:     #252A3A;
  --border2:    #2E354A;
  --accent:     #00FFB2;
  --accent2:    #00C8FF;
  --red:        #FF4060;
  --yellow:     #FFD060;
  --purple:     #9B70FF;
  --text:       #E8EAF0;
  --muted:      #5A6080;
  --muted2:     #7A80A0;

  /* group highlight palette */
  --g0: #00FFB2;
  --g1: #FF4060;
  --g2: #00C8FF;
  --g3: #FFD060;
  --g4: #9B70FF;
  --g5: #FF9040;
  --g6: #40FFE0;
  --g7: #FF60B0;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  width: 100%; height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'Syne', sans-serif;
  overflow-x: hidden;
}

/* ════════════════════════════════════════════════════════════ SPLASH SCREEN */

#splash {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.8s ease, transform 0.8s ease;
}

#splash.exit {
  opacity: 0;
  transform: scale(1.04);
  pointer-events: none;
}

#splash-canvas {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  opacity: 0.18;
}

.splash-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  text-align: center;
  animation: splash-rise 1s cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes splash-rise {
  from { opacity: 0; transform: translateY(32px); }
  to   { opacity: 1; transform: translateY(0); }
}

.omg-monogram {
  margin-bottom: 16px;
  opacity: 0;
  animation: fade-in 0.6s 0.1s forwards;
  filter: drop-shadow(0 0 10px rgba(0,255,178,0.3));
}

.splash-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.3em;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 4px 14px;
  border-radius: 2px;
  margin-bottom: 28px;
  opacity: 0;
  animation: fade-in 0.5s 0.4s forwards;
}

.splash-title-wrap {
  display: flex;
  align-items: baseline;
  gap: 0;
  line-height: 1;
  margin-bottom: 12px;
}

.splash-k {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: clamp(4rem, 13vw, 8rem);
  color: var(--text);
  opacity: 0;
  animation: slide-in-left 0.7s 0.2s cubic-bezier(0.16,1,0.3,1) forwards;
}

.splash-x {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: clamp(4rem, 13vw, 8rem);
  color: var(--accent);
  text-shadow: 0 0 60px rgba(0,255,178,0.5), 0 0 120px rgba(0,255,178,0.2);
  opacity: 0;
  animation: slide-in-right 0.7s 0.3s cubic-bezier(0.16,1,0.3,1) forwards;
}

.splash-sub {
  font-family: 'JetBrains Mono', monospace;
  font-size: clamp(0.7rem, 2vw, 0.95rem);
  color: var(--muted2);
  letter-spacing: 0.15em;
  margin-bottom: 40px;
  opacity: 0;
  animation: fade-in 0.5s 0.7s forwards;
}

/* Mini K-Map Preview */
.splash-grid-preview {
  margin-bottom: 40px;
  opacity: 0;
  animation: fade-in 0.5s 0.9s forwards;
}

.mini-kmap {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
  width: clamp(160px, 30vw, 220px);
}

.mk-cell {
  aspect-ratio: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  color: var(--muted);
  border-radius: 4px;
  opacity: 0;
  animation: cell-pop var(--d, 0.1s) cubic-bezier(0.34,1.56,0.64,1) both;
  animation-delay: calc(var(--d) + 0.6s);
}

.mk-cell.on {
  background: rgba(0,255,178,0.12);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 12px rgba(0,255,178,0.2);
}

@keyframes cell-pop {
  from { opacity: 0; transform: scale(0.5); }
  to   { opacity: 1; transform: scale(1); }
}

/* Progress bar */
.splash-progress-wrap {
  width: clamp(240px, 50vw, 380px);
  margin-bottom: 36px;
  opacity: 0;
  animation: fade-in 0.5s 1.2s forwards;
}

.splash-progress-bar {
  height: 2px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 10px;
}

.splash-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 2px;
  width: 0%;
  transition: width 0.3s ease;
  box-shadow: 0 0 8px var(--accent);
}

.splash-progress-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  color: var(--muted);
  letter-spacing: 0.1em;
  text-align: left;
}

/* Enter button */
.splash-enter {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--accent);
  color: var(--bg);
  border: none;
  padding: 14px 36px;
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.15em;
  cursor: pointer;
  border-radius: 3px;
  transition: all 0.2s ease;
  opacity: 0;
  pointer-events: none;
  box-shadow: 0 0 30px rgba(0,255,178,0.3);
  animation: none;
}

.splash-enter.visible {
  animation: btn-appear 0.5s cubic-bezier(0.34,1.56,0.64,1) forwards;
  pointer-events: all;
}

.splash-enter:hover {
  background: var(--text);
  transform: translateY(-2px);
  box-shadow: 0 0 50px rgba(0,255,178,0.4);
}

.splash-enter:active { transform: translateY(0); }

@keyframes btn-appear {
  from { opacity: 0; transform: scale(0.8) translateY(8px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

@keyframes fade-in {
  to { opacity: 1; }
}

@keyframes slide-in-left {
  from { opacity: 0; transform: translateX(-40px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes slide-in-right {
  from { opacity: 0; transform: translateX(40px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ════════════════════════════════════════════════════════════════ MAIN APP */

#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

#app.visible {
  opacity: 1;
  transform: translateY(0);
}

#app.hidden { display: none; }

/* ── Header ── */
.app-header {
  display: flex;
  align-items: center;
  padding: 0 28px;
  height: 58px;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  gap: 24px;
}

.header-logo {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.logo-k   { color: var(--text); }
.logo-x   { color: var(--accent); text-shadow: 0 0 14px rgba(0,255,178,0.5); }

.header-nav {
  display: flex;
  gap: 4px;
  flex: 1;
}

.nav-tab {
  background: none;
  border: none;
  color: var(--muted2);
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  padding: 6px 14px;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s;
  position: relative;
}

.nav-tab::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 50%; right: 50%;
  height: 2px;
  background: var(--accent);
  transition: left 0.2s, right 0.2s;
  border-radius: 2px;
}

.nav-tab.active { color: var(--text); }
.nav-tab.active::after { left: 14px; right: 14px; }
.nav-tab:hover:not(.active) { color: var(--text); background: var(--surface); }

.header-status {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--muted);
  white-space: nowrap;
  padding: 4px 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 3px;
  max-width: 280px;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color 0.3s;
}

.header-status.success { color: var(--accent); }
.header-status.error   { color: var(--red); }

/* ── Input Zone ── */
.input-zone {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: 20px 28px 16px;
}

.input-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  color: var(--muted);
  margin-bottom: 10px;
}

.input-row {
  display: flex;
  gap: 12px;
  align-items: stretch;
  margin-bottom: 12px;
}

.input-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: 4px;
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.input-wrap:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(0,255,178,0.12);
}

.input-prefix {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.95rem;
  color: var(--muted2);
  padding: 0 14px;
  border-right: 1px solid var(--border);
  white-space: nowrap;
}

#expr-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  padding: 13px 16px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.05rem;
  color: var(--accent);
  caret-color: var(--accent);
  letter-spacing: 0.05em;
}

#expr-input::placeholder { color: var(--muted); }

.btn-simplify {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: var(--bg);
  border: none;
  padding: 0 22px;
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s;
  white-space: nowrap;
}

.btn-simplify:hover {
  background: var(--text);
  transform: translateX(2px);
}

.btn-simplify:active { transform: translateX(0); }

.examples-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.ex-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  color: var(--muted);
  letter-spacing: 0.1em;
}

.ex-btn {
  background: var(--surface);
  border: 1px solid var(--border2);
  color: var(--muted2);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  padding: 4px 10px;
  cursor: pointer;
  border-radius: 3px;
  transition: all 0.15s;
}

.ex-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0,255,178,0.06);
}

.input-hint {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.67rem;
  color: var(--muted);
  letter-spacing: 0.05em;
}

/* ── Panels ── */
.panels { flex: 1; position: relative; }

.panel {
  display: none;
  height: 100%;
  min-height: calc(100vh - 180px);
}

.panel.active { display: block; }

.panel-inner {
  padding: 28px;
  max-width: 960px;
  margin: 0 auto;
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  color: var(--muted);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  padding: 80px 20px;
  text-align: center;
}

.empty-icon {
  font-size: 3rem;
  opacity: 0.3;
}

/* ════════════════════════════════════════════════════════════════ K-MAP */

.kmap-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.kmap-outer {
  position: relative;
  display: inline-block;
}

.kmap-axis-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--muted2);
  letter-spacing: 0.12em;
  text-align: center;
  margin-bottom: 6px;
}

.kmap-ab-label {
  position: absolute;
  left: -44px;
  top: 50%;
  transform: translateY(-50%) rotate(-90deg);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--muted2);
  letter-spacing: 0.12em;
  white-space: nowrap;
}

.kmap-table {
  border-collapse: separate;
  border-spacing: 4px;
}

.kmap-table .hdr {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  color: var(--muted2);
  padding: 4px 8px;
  text-align: center;
  min-width: 70px;
}

.kmap-cell {
  width: 70px;
  height: 70px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  text-align: center;
  vertical-align: middle;
  position: relative;
  transition: background 0.3s, border-color 0.3s, box-shadow 0.3s;
  cursor: default;
}

.kmap-cell .cell-val {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.6rem;
  display: block;
  line-height: 1;
  margin-top: 10px;
}

.kmap-cell .cell-idx {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  position: absolute;
  top: 5px; right: 7px;
  opacity: 0.5;
}

.kmap-cell.val-0 .cell-val { color: var(--muted); }
.kmap-cell.val-1 .cell-val { color: var(--bg); }

/* Don't-care cells: show X in orange, dashed border */
.kmap-cell.val-x { background: rgba(255,144,64,0.08); border-color: rgba(255,144,64,0.4); border-style: dashed; }
.kmap-cell.val-x .cell-val { color: #FF9040; font-style: italic; font-weight: 700; }

/* group coloring */
.kmap-cell.group-0 { background: rgba(0,255,178,0.2);  border-color: var(--g0); box-shadow: inset 0 0 0 1px var(--g0), 0 0 10px rgba(0,255,178,0.2); }
.kmap-cell.group-1 { background: rgba(255,64,96,0.2);  border-color: var(--g1); box-shadow: inset 0 0 0 1px var(--g1), 0 0 10px rgba(255,64,96,0.2); }
.kmap-cell.group-2 { background: rgba(0,200,255,0.2);  border-color: var(--g2); box-shadow: inset 0 0 0 1px var(--g2), 0 0 10px rgba(0,200,255,0.2); }
.kmap-cell.group-3 { background: rgba(255,208,96,0.2); border-color: var(--g3); box-shadow: inset 0 0 0 1px var(--g3), 0 0 10px rgba(255,208,96,0.2); }
.kmap-cell.group-4 { background: rgba(155,112,255,0.2);border-color: var(--g4); box-shadow: inset 0 0 0 1px var(--g4), 0 0 10px rgba(155,112,255,0.2); }
.kmap-cell.group-5 { background: rgba(255,144,64,0.2); border-color: var(--g5); box-shadow: inset 0 0 0 1px var(--g5), 0 0 10px rgba(255,144,64,0.2); }
.kmap-cell.group-6 { background: rgba(64,255,224,0.2); border-color: var(--g6); box-shadow: inset 0 0 0 1px var(--g6), 0 0 10px rgba(64,255,224,0.2); }
.kmap-cell.group-7 { background: rgba(255,96,176,0.2); border-color: var(--g7); box-shadow: inset 0 0 0 1px var(--g7), 0 0 10px rgba(255,96,176,0.2); }

.kmap-cell.group-0 .cell-idx { color: var(--g0); opacity: 0.8; }
.kmap-cell.group-1 .cell-idx { color: var(--g1); opacity: 0.8; }
.kmap-cell.group-2 .cell-idx { color: var(--g2); opacity: 0.8; }
.kmap-cell.group-3 .cell-idx { color: var(--g3); opacity: 0.8; }
.kmap-cell.group-4 .cell-idx { color: var(--g4); opacity: 0.8; }
.kmap-cell.group-5 .cell-idx { color: var(--g5); opacity: 0.8; }
.kmap-cell.group-6 .cell-idx { color: var(--g6); opacity: 0.8; }
.kmap-cell.group-7 .cell-idx { color: var(--g7); opacity: 0.8; }

/* Legend */
.kmap-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 6px 12px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
}

.legend-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ════════════════════════════════════════════════════════════════ RESULTS */

.results-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px 18px;
  transition: border-color 0.2s;
}

.stat-card:hover { border-color: var(--border2); }

.stat-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  color: var(--muted);
  margin-bottom: 8px;
  text-transform: uppercase;
}

.stat-value {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 2rem;
  line-height: 1;
}

.stat-value.green  { color: var(--accent); }
.stat-value.red    { color: var(--red); }
.stat-value.blue   { color: var(--accent2); }
.stat-value.yellow { color: var(--yellow); }
.stat-value.dc     { color: #FF9040; }

.expr-rows { display: flex; flex-direction: column; gap: 10px; }

.expr-row {
  display: flex;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  transition: border-color 0.2s;
}

.expr-row:hover { border-color: var(--border2); }

.expr-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem;
  letter-spacing: 0.15em;
  color: var(--muted);
  padding: 0 14px;
  border-right: 1px solid var(--border);
  white-space: nowrap;
  min-width: 110px;
  align-self: stretch;
  display: flex;
  align-items: center;
}

.expr-value {
  flex: 1;
  padding: 14px 16px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.95rem;
  letter-spacing: 0.03em;
  word-break: break-all;
}

.expr-value.original   { color: var(--muted2); }
.expr-value.simplified { color: var(--accent); }
.expr-value.minterms   { color: var(--accent2); }
.expr-value.dc         { color: #FF9040; }

.copy-btn {
  background: none;
  border: none;
  border-left: 1px solid var(--border);
  color: var(--muted);
  padding: 0 14px;
  cursor: pointer;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  align-self: stretch;
  display: flex;
  align-items: center;
  transition: all 0.2s;
  white-space: nowrap;
}

.copy-btn:hover { color: var(--accent); background: rgba(0,255,178,0.06); }

/* ════════════════════════════════════════════════════════ PRIME IMPLICANTS */

.pi-header {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.pi-table-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

.pi-table {
  width: 100%;
  border-collapse: collapse;
}

.pi-table th {
  background: var(--surface2);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  color: var(--muted);
  text-transform: uppercase;
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.pi-table td {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  color: var(--text);
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.pi-table tr:last-child td { border-bottom: none; }

.pi-table tr:hover td { background: rgba(255,255,255,0.02); }

.pi-color-dot {
  display: inline-block;
  width: 10px; height: 10px;
  border-radius: 50%;
  margin-right: 8px;
  vertical-align: middle;
}

.pi-expr { font-weight: 600; }

.size-badge {
  display: inline-block;
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: 3px;
  padding: 2px 8px;
  font-size: 0.72rem;
  color: var(--muted2);
}

/* ════════════════════════════════════════════════════════════════ UTILITIES */

.kmap-cell { animation: cell-appear 0.3s ease both; }

@keyframes cell-appear {
  from { opacity: 0; transform: scale(0.8); }
  to   { opacity: 1; transform: scale(1); }
}

/* stagger cells */
.kmap-cell:nth-child(1)  { animation-delay: 0.02s; }
.kmap-cell:nth-child(2)  { animation-delay: 0.04s; }
.kmap-cell:nth-child(3)  { animation-delay: 0.06s; }
.kmap-cell:nth-child(4)  { animation-delay: 0.08s; }
.kmap-cell:nth-child(5)  { animation-delay: 0.10s; }
.kmap-cell:nth-child(6)  { animation-delay: 0.12s; }
.kmap-cell:nth-child(7)  { animation-delay: 0.14s; }
.kmap-cell:nth-child(8)  { animation-delay: 0.16s; }
.kmap-cell:nth-child(9)  { animation-delay: 0.18s; }
.kmap-cell:nth-child(10) { animation-delay: 0.20s; }
.kmap-cell:nth-child(11) { animation-delay: 0.22s; }
.kmap-cell:nth-child(12) { animation-delay: 0.24s; }
.kmap-cell:nth-child(13) { animation-delay: 0.26s; }
.kmap-cell:nth-child(14) { animation-delay: 0.28s; }
.kmap-cell:nth-child(15) { animation-delay: 0.30s; }
.kmap-cell:nth-child(16) { animation-delay: 0.32s; }

/* ════════════════════════════════════════════════════════════════ FOOTER */

.app-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 28px;
  border-top: 1px solid var(--border);
  background: var(--bg2);
  margin-top: auto;
}

.footer-omg {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  color: var(--muted);
  letter-spacing: 0.1em;
}

.footer-app {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  color: var(--muted);
  letter-spacing: 0.08em;
}

/* ════════════════════════════════════════════════════════════════ SCROLLBAR */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--muted); }

/* ════════════════════════════════════════════════════════════════ RESPONSIVE */

@media (max-width: 600px) {
  .app-header { padding: 0 14px; gap: 10px; }
  .header-status { display: none; }
  .input-zone { padding: 14px 14px 10px; }
  .panel-inner { padding: 16px; }
  .kmap-cell { width: 54px; height: 54px; }
  .kmap-cell .cell-val { font-size: 1.2rem; }
  .nav-tab { font-size: 0.72rem; padding: 6px 8px; }
}