@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;600;700&family=Orbitron:wght@600;800&family=Sora:wght@400;500;600;700&display=swap');

/* ============================================================
   SENSORSHHUB — style.css  (cleaned + mode-color + slim toolbar)
   ============================================================ */

:root {
  --bg:            #080f18;
  --bg-alt:        #0c1621;
  --surface:       rgba(8,  15, 24,  0.94);
  --surface2:      rgba(12, 22, 34,  0.96);
  --surface3:      rgba(18, 32, 47,  0.97);
  --surface4:      rgba(24, 42, 61,  0.98);
  --border:        rgba(86,  126, 164, 0.16);
  --border-strong: rgba(116, 169, 221, 0.26);
  --text:          #c2d1e0;
  --text-dim:      #6e8299;
  --text-bright:   #f0f6fc;

  --accent:        #5eb8ff;
  --accent-dim:    #16304a;
  --accent-soft:   rgba(94, 184, 255, 0.15);
  --accent-rgb:    94, 184, 255;

  --green:         #45d9a7;
  --green-dim:     #15382e;
  --green-rgb:     69, 217, 167;
  --red:           #ff707b;
  --red-dim:       #3d1a21;
  --yellow:        #ffca5f;
  --yellow-dim:    #3f3418;
  --orange:        #ffa070;
  --orange-dim:    #3e271b;
  --cyan:          #38d8ea;

  --shadow-sm:  0 4px  16px rgba(0,0,0,0.22);
  --shadow-md:  0 16px 36px rgba(0,0,0,0.30);
  --shadow-lg:  0 24px 52px rgba(0,0,0,0.38);

  --radius-sm:  10px;
  --radius-md:  16px;
  --radius-lg:  22px;

  --font-ui:      'Sora', sans-serif;
  --font-mono:    'JetBrains Mono', monospace;
  --font-display: 'Orbitron', monospace;

  --toolbar-h:  68px;
  --tab-bar-h:  50px;

  /* ── Mode colour tokens (Arduino default = blue) ── */
  --mode-color:        #5eb8ff;
  --mode-color-dim:    rgba(94, 184, 255, 0.18);
  --mode-color-border: rgba(94, 184, 255, 0.40);
  --mode-color-glow:   rgba(94, 184, 255, 0.22);
  --mode-color-bg:     rgba(16, 48, 76,  0.55);
  --mode-snake:        rgba(94, 184, 255, 0.70);
}

/* ── MicroPython mode — applied via JS on <html> ── */
html[data-mode="py"] {
  --mode-color:        #45d9a7;
  --mode-color-dim:    rgba(69, 217, 167, 0.18);
  --mode-color-border: rgba(69, 217, 167, 0.40);
  --mode-color-glow:   rgba(69, 217, 167, 0.22);
  --mode-color-bg:     rgba(14, 50, 38,  0.55);
  --mode-snake:        rgba(69, 217, 167, 0.70);
}

/* ── Arduino mode explicit (redundant but clear) ── */
html[data-mode="ino"] {
  --mode-color:        #5eb8ff;
  --mode-color-dim:    rgba(94, 184, 255, 0.18);
  --mode-color-border: rgba(94, 184, 255, 0.40);
  --mode-color-glow:   rgba(94, 184, 255, 0.22);
  --mode-color-bg:     rgba(16, 48, 76,  0.55);
  --mode-snake:        rgba(94, 184, 255, 0.70);
}

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

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 15%  5%, rgba(56,216,234,0.10), transparent 35%),
    radial-gradient(ellipse at 85% 10%, rgba(94,184,255,0.10), transparent 38%),
    linear-gradient(175deg, #060e18 0%, #09131e 50%, #0a1522 100%);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 12px;
}

/* ============================================================
   SNAKE LIGHT ANIMATIONS
   ============================================================ */
@keyframes snakeToolbar  { 0%   { left: -30%; } 100% { left: 110%; } }
@keyframes snakePalette  { 0%   { left: 110%; } 100% { left: -30%; } }

/* toolbar bottom-edge snake */
#toolbar::after {
  content: '';
  position: absolute; bottom: 0; left: -30%;
  width: 30%; height: 2px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255,255,255,0.04) 15%,
    var(--mode-snake) 40%,
    rgba(255,255,255,0.95) 50%,
    var(--mode-snake) 60%,
    rgba(255,255,255,0.04) 85%,
    transparent 100%
  );
  border-radius: 999px;
  pointer-events: none;
  animation: snakeToolbar 4s cubic-bezier(0.4,0,0.6,1) infinite;
  filter: blur(0.5px);
  z-index: 70;
  transition: background 0.5s ease;
}

/* palette top-border snake (right → left) */
#palette-wrapper::before {
  content: '';
  position: absolute; top: 0; left: 110%;
  width: 30%; height: 2px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255,255,255,0.04) 15%,
    var(--mode-snake) 40%,
    rgba(255,255,255,0.95) 50%,
    var(--mode-snake) 60%,
    rgba(255,255,255,0.04) 85%,
    transparent 100%
  );
  border-radius: 999px;
  pointer-events: none;
  animation: snakePalette 4s cubic-bezier(0.4,0,0.6,1) 2s infinite;
  filter: blur(0.5px);
  z-index: 70;
  transition: background 0.5s ease;
}

/* canvas shimmer (one-shot on load) */
@keyframes shimmerSweep {
  0%   { transform: translateX(-150%) skewX(-12deg); opacity: 0; }
  15%  { opacity: 1; }
  85%  { opacity: 1; }
  100% { transform: translateX(250%) skewX(-12deg); opacity: 0; }
}
#canvas-container::after {
  content: '';
  position: absolute; inset: 0;
  pointer-events: none; z-index: 5; width: 60%;
  background: linear-gradient(
    105deg,
    transparent 20%,
    rgba(94,184,255,0.03) 45%,
    rgba(56,216,234,0.06) 50%,
    rgba(94,184,255,0.03) 55%,
    transparent 80%
  );
  animation: shimmerSweep 2.2s cubic-bezier(0.4,0,0.6,1) 1.2s 1 both;
}

/* ============================================================
   TOOLBAR
   ============================================================ */
@keyframes toolbarEntry { from { transform: translateY(-100%); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

#toolbar {
  height: var(--toolbar-h);
  padding: 0 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(180deg, rgba(12,22,34,0.95), rgba(9,17,26,0.90));
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  position: relative;
  z-index: 60;
  overflow-x: auto;
  scrollbar-width: none;
  backdrop-filter: blur(8px);
  transition: border-bottom-color 0.4s ease, box-shadow 0.4s ease;
  animation: toolbarEntry 0.5s cubic-bezier(0.22,1,0.36,1) both;
}
#toolbar::-webkit-scrollbar { display: none; }

/* ── Running state ── */
#toolbar.sim-running {
  border-bottom-color: rgba(69,217,167,0.6);
  box-shadow: var(--shadow-sm), 0 2px 24px rgba(69,217,167,0.18), inset 0 -1px 0 rgba(69,217,167,0.3);
}
#toolbar.sim-running::after {
  background: linear-gradient(
    90deg,
    transparent 0%, rgba(255,255,255,0.04) 15%,
    rgba(69,217,167,0.7) 40%, rgba(255,255,255,0.95) 50%,
    rgba(69,217,167,0.7) 60%, rgba(255,255,255,0.04) 85%,
    transparent 100%
  );
  animation: snakeToolbar 2s cubic-bezier(0.4,0,0.6,1) infinite;
}

/* ── Stopped state ── */
@keyframes toolbarStopFlash {
  0%   { border-bottom-color: rgba(255,112,123,0.9); box-shadow: var(--shadow-sm), 0 2px 32px rgba(255,112,123,0.35); }
  100% { border-bottom-color: rgba(255,112,123,0.5); box-shadow: var(--shadow-sm), 0 2px 20px rgba(255,112,123,0.14); }
}
#toolbar.sim-stopped {
  border-bottom-color: rgba(255,112,123,0.5);
  box-shadow: var(--shadow-sm), 0 2px 20px rgba(255,112,123,0.14), inset 0 -1px 0 rgba(255,112,123,0.25);
  animation: toolbarStopFlash 0.5s ease forwards;
}

/* ── Brand ── */
.brand-block {
  display: flex; flex-direction: column; justify-content: center;
  min-width: 170px; gap: 1px; margin-right: 4px; flex-shrink: 0;
}
.brand-badge {
  font-size: 8.5px; font-weight: 700; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--text-dim); opacity: 0.85;
}
.logo {
  font-family: var(--font-display); font-size: 20px; font-weight: 800;
  letter-spacing: 0.05em; color: var(--text-bright); white-space: nowrap;
}
@keyframes logoPulse {
  0%,100% { text-shadow: 0 0 14px rgba(56,216,234,0.45), 0 0 36px rgba(56,216,234,0.2); }
  50%      { text-shadow: 0 0 22px rgba(56,216,234,0.75), 0 0 52px rgba(56,216,234,0.35); }
}
.logo span {
  color: var(--cyan);
  text-shadow: 0 0 14px rgba(56,216,234,0.45), 0 0 36px rgba(56,216,234,0.2);
  animation: logoPulse 4s ease-in-out infinite;
}

.toolbar-sep {
  width: 1px; height: 28px;
  background: linear-gradient(180deg, transparent, var(--border-strong), transparent);
  flex-shrink: 0; opacity: 0.7;
}

/* ── Status pill (truncates with ellipsis, full text on hover via title) ── */
#status {
  margin-left: auto;
  display: block;
  flex: 0 1 auto; min-width: 0; max-width: 340px;
  height: 34px; line-height: 32px; padding: 0 14px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  border-radius: 999px;
  background: rgba(10,22,36,0.85);
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 10px; font-weight: 600;
  font-family: var(--font-mono); letter-spacing: 0.06em;
  transition: border-color 0.3s ease, color 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
}

/* Expand long circuit/runtime messages so the full warning is readable. */
#status:hover {
  max-width: min(620px, 62vw);
  overflow: visible;
  text-overflow: clip;
  position: relative;
  z-index: 80;
}
#status.status-running {
  color: var(--green); border-color: rgba(69,217,167,0.45);
  background: rgba(21,56,46,0.6); box-shadow: 0 0 12px rgba(69,217,167,0.15);
}
#status.status-stopped {
  color: var(--red); border-color: rgba(255,112,123,0.4);
  background: rgba(61,26,33,0.5); box-shadow: 0 0 10px rgba(255,112,123,0.12);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  min-height: 38px; padding: 8px 13px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(22,36,52,0.9), rgba(15,26,38,0.9));
  color: var(--text);
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  cursor: pointer; flex-shrink: 0;
  font-family: var(--font-ui); font-size: 11px; font-weight: 600;
  white-space: nowrap;
  transition: transform 0.2s ease, border-color 0.2s ease, color 0.2s ease,
              background 0.2s ease, box-shadow 0.2s ease;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.03), 0 2px 6px rgba(0,0,0,0.18);
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  position: relative; overflow: hidden;
}
.btn:hover {
  color: var(--text-bright); border-color: var(--border-strong);
  background: linear-gradient(180deg, rgba(30,48,68,0.95), rgba(20,34,49,0.95));
  transform: translateY(-1.5px); box-shadow: var(--shadow-sm);
}
.btn:active { transform: translateY(0) scale(0.96); }

.btn.active {
  color: var(--accent); border-color: rgba(94,184,255,0.5);
  background: linear-gradient(180deg, rgba(22,52,78,0.92), rgba(16,40,60,0.92));
  box-shadow: 0 0 16px rgba(94,184,255,0.15), inset 0 1px 0 rgba(255,255,255,0.04);
}
.btn.green {
  color: var(--green); border-color: rgba(69,217,167,0.32);
  background: linear-gradient(180deg, rgba(17,54,45,0.95), rgba(13,40,34,0.95));
}
.btn.red {
  color: var(--red); border-color: rgba(255,112,123,0.30);
  background: linear-gradient(180deg, rgba(61,26,33,0.95), rgba(44,18,23,0.95));
}
.btn.yellow {
  color: var(--yellow); border-color: rgba(255,202,95,0.30);
  background: linear-gradient(180deg, rgba(63,52,24,0.95), rgba(47,38,18,0.95));
}

/* ── Icon-only buttons (label hidden, tooltip stays) ── */
.btn.icon-only { width: 38px; padding: 0; font-size: 14px; }
.btn.icon-only .btn-label { display: none; }

/* ── Segmented Wire / Move / Delete ──
   Uses :not(.active/.green/.red) so it never fights the colour classes */
.seg {
  display: inline-flex; flex-shrink: 0; gap: 2px; padding: 3px;
  border: 1px solid var(--border); border-radius: 999px;
  background: rgba(255,255,255,0.03);
}
.seg .btn {
  min-height: 32px; padding: 6px 13px;
  box-shadow: none;
}
.seg .btn:not(.active):not(.red) {
  border-color: transparent; background: transparent;
}
.seg .btn.red:not(.active) {
  background: transparent; border-color: transparent;
}
.seg .btn:not(.active):hover {
  background: rgba(255,255,255,0.07);
  transform: none; box-shadow: none;
}
.seg .btn.red:not(.active):hover {
  background: rgba(255,112,123,0.10);
}

/* ── Button ripple ── */
@keyframes btnRipple { to { transform: translate(-50%,-50%) scale(28); opacity: 0; } }
.btn-ripple {
  position: absolute; width: 6px; height: 6px; border-radius: 50%;
  background: rgba(94,184,255,0.45);
  transform: translate(-50%,-50%) scale(0);
  animation: btnRipple 0.6s ease-out forwards;
  pointer-events: none;
}
.btn.green  .btn-ripple { background: rgba(69,217,167,0.40); }
.btn.red    .btn-ripple { background: rgba(255,112,123,0.40); }
.btn.yellow .btn-ripple { background: rgba(255,202,95, 0.40); }

/* ── Dropdown menus (live outside #toolbar so overflow can't clip them) ── */
.menu-pop {
  position: fixed; z-index: 500; min-width: 190px; padding: 6px;
  display: none; flex-direction: column; gap: 2px;
  border-radius: 14px; border: 1px solid var(--border-strong);
  background: rgba(8,16,26,0.97); backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-lg);
}
.menu-pop.open { display: flex; }
.menu-item {
  display: flex; align-items: center; gap: 10px; padding: 10px 12px;
  border: none; border-radius: 9px; background: transparent;
  color: var(--text); font-family: var(--font-ui); font-size: 11px; font-weight: 600;
  text-align: left; cursor: pointer; width: 100%;
}
.menu-item:hover { background: rgba(94,184,255,0.10); color: var(--text-bright); }
.menu-item.danger:hover { background: rgba(255,112,123,0.12); color: var(--red); }

.recovery-overlay {
  position: fixed; inset: 0; z-index: 700; display: grid; place-items: center;
  padding: 18px; background: rgba(3,8,14,0.68); backdrop-filter: blur(6px);
}
.recovery-overlay[hidden] { display: none; }
.recovery-dialog {
  width: min(420px, 100%); padding: 22px; border-radius: 18px;
  border: 1px solid var(--border-strong); background: rgba(8,16,26,0.98);
  box-shadow: var(--shadow-lg);
}
.recovery-title { color: var(--text-bright); font-size: 15px; font-weight: 700; }
.recovery-text { margin-top: 8px; color: var(--text-dim); font-size: 11px; line-height: 1.5; }
.recovery-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 18px; flex-wrap: wrap; }
.recovery-actions .btn { min-height: 34px; padding: 7px 12px; }

/* ============================================================
   MOBILE TAB BAR
   ============================================================ */
#mobile-tab-bar {
  display: none;
  height: var(--tab-bar-h);
  background: rgba(6,12,19,0.94);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(14px);
  position: relative; z-index: 50;
}
.mob-tab {
  flex: 1; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 3px;
  font-size: 9px; font-weight: 700; color: var(--text-dim);
  letter-spacing: 0.08em; text-transform: uppercase;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.mob-tab .mob-icon { font-size: 16px; }
.mob-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  background: rgba(94,184,255,0.05);
}

/* ============================================================
   APP LAYOUT
   ============================================================ */
#app {
  display: flex; flex-direction: column;
  height: calc(100vh - var(--toolbar-h));
  overflow: hidden;
}
#main-container {
  flex: 1; min-height: 0; display: flex; overflow: hidden;
}

/* ============================================================
   CODE PANEL
   ============================================================ */
@keyframes panelEntry {
  from { transform: translateX(-32px); opacity: 0; }
  to   { transform: translateX(0);     opacity: 1; }
}
#code-panel {
  width: 38%; min-width: 300px; max-width: 560px;
  display: flex; flex-direction: column; flex-shrink: 0;
  background: linear-gradient(180deg, rgba(9,17,26,0.96), rgba(8,14,22,0.90));
  border-right: 1px solid var(--border);
  box-shadow: inset -1px 0 0 rgba(255,255,255,0.02);
  transition: width 0.32s cubic-bezier(0.22,1,0.36,1), min-width 0.32s ease,
              border-color 0.5s ease, box-shadow 0.5s ease;
  animation: panelEntry 0.55s cubic-bezier(0.22,1,0.36,1) 0.1s both;
}
#code-panel.collapsed { width: 0; min-width: 0; overflow: hidden; border-right: none; }

/* Mode-coloured left border on the panel */
#code-panel {
  border-left: 3px solid var(--mode-color-border);
  box-shadow: inset -1px 0 0 rgba(255,255,255,0.02),
              inset 3px 0 18px var(--mode-color-dim);
}

/* ── Code header ── */
#code-header {
  height: 52px; padding: 0 16px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  background: linear-gradient(180deg, rgba(13,25,38,0.92), rgba(9,18,28,0.92));
  border-bottom: 1px solid var(--mode-color-border);
  box-shadow: 0 1px 12px var(--mode-color-dim);
  transition: border-color 0.5s ease, box-shadow 0.5s ease;
}

/* ── Language toggle ── */
.lang-toggle-wrap {
  display: flex; align-items: center; gap: 10px;
}
.lang-label {
  font-size: 10px; font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--text-dim);
  transition: color 0.25s ease, text-shadow 0.25s ease;
  white-space: nowrap; user-select: none;
}
.lang-label.lang-active {
  color: var(--mode-color);
  text-shadow: 0 0 10px var(--mode-color-glow);
}

/* Toggle pill */
.lang-toggle {
  position: relative; width: 46px; height: 24px;
  border-radius: 999px;
  background: var(--mode-color-dim);
  border: 1px solid var(--mode-color-border);
  cursor: pointer;
  transition: background 0.4s ease, border-color 0.4s ease;
  flex-shrink: 0;
}
.lang-toggle:hover { filter: brightness(1.15); }

/* Toggle thumb */
.lang-toggle-thumb {
  position: absolute; top: 3px; left: 3px;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--mode-color);
  box-shadow: 0 0 8px var(--mode-color-glow);
  transition: transform 0.28s cubic-bezier(0.34,1.56,0.64,1),
              background 0.4s ease, box-shadow 0.4s ease;
}

/* Mode badge chip beside toggle */
#mode-badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 4px 10px; border-radius: 999px;
  background: var(--mode-color-bg);
  border: 1px solid var(--mode-color-border);
  color: var(--mode-color);
  font-size: 9px; font-weight: 700; letter-spacing: 0.1em;
  text-transform: uppercase; font-family: var(--font-mono);
  transition: background 0.4s ease, border-color 0.4s ease, color 0.4s ease, box-shadow 0.4s ease;
  box-shadow: 0 0 10px var(--mode-color-dim);
  white-space: nowrap;
}
#mode-badge::before {
  content: '';
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--mode-color);
  box-shadow: 0 0 6px var(--mode-color);
  animation: badgePulse 2s ease-in-out infinite;
}
@keyframes badgePulse {
  0%,100% { opacity: 1; }
  50%     { opacity: 0.4; }
}

.editor-meta { color: var(--text-dim); font-size: 10px; font-weight: 600; white-space: nowrap; }

/* ── Code editor area ── */
#code-editor { flex: 1; min-height: 0; display: flex; flex-direction: column; }

/* CodeMirror host — fills the flex space */
#cm-host {
  flex: 1; min-height: 0; overflow: hidden;
  border-left: 3px solid var(--mode-color-border);
  transition: border-color 0.5s ease, box-shadow 0.5s ease;
  box-shadow: inset 3px 0 12px var(--mode-color-dim);
}

/* Override CodeMirror theme to match our dark bg */
.CodeMirror {
  height: 100% !important;
  background: linear-gradient(175deg, rgba(6,12,20,0.96), rgba(5,10,16,0.98)) !important;
  color: #d7e5f3 !important;
  font-family: var(--font-mono) !important;
  font-size: 12px !important;
  line-height: 1.75 !important;
}
.CodeMirror-scroll { min-height: 100%; }
.CodeMirror-gutters {
  background: rgba(8,16,26,0.95) !important;
  border-right: 1px solid var(--border) !important;
}
.CodeMirror-linenumber { color: #3a556a !important; padding: 0 10px; }
.CodeMirror-cursor { border-left: 2px solid var(--mode-color) !important; transition: border-color 0.4s ease; }
.CodeMirror-selected { background: var(--mode-color-dim) !important; }
.CodeMirror-focused .CodeMirror-selected { background: rgba(var(--accent-rgb), 0.18) !important; }

/* Syntax tokens */
.cm-keyword  { color: #f97583 !important; }
.cm-atom     { color: #79b8ff !important; }
.cm-number   { color: #ffca5f !important; }
.cm-def      { color: #b392f0 !important; }
.cm-variable { color: #d7e5f3 !important; }
.cm-variable-2 { color: #9ecbff !important; }
.cm-string   { color: #9ecbff !important; }
.cm-comment  { color: #4d6478 !important; font-style: italic !important; }
.cm-builtin  { color: #45d9a7 !important; }
.cm-operator { color: #f97583 !important; }
.cm-meta     { color: #ffca5f !important; }
.cm-tag      { color: #85e89d !important; }
.cm-attribute{ color: #ffab70 !important; }
.cm-property { color: #79b8ff !important; }
.cm-type     { color: #b392f0 !important; }

/* Fallback textarea (hidden when CM loads) */
#code-textarea {
  display: none; /* replaced by CodeMirror */
  flex: 1; min-height: 0;
  border: none; outline: none; resize: none; padding: 20px;
  background: linear-gradient(175deg, rgba(6,12,20,0.92), rgba(5,10,16,0.96));
  color: #d7e5f3;
  font-family: var(--font-mono); font-size: 12px; line-height: 1.75;
  caret-color: var(--mode-color);
}
#code-textarea::placeholder { color: #5c7590; }

#code-buttons {
  padding: 14px 16px 16px;
  display: flex; gap: 10px; flex-wrap: wrap;
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(9,17,26,0.93), rgba(7,13,20,0.96));
}
.btn.secondary-action {
  color: var(--text-dim);
  border-color: rgba(255,255,255,.12);
  background: rgba(255,255,255,.035);
}
.btn.secondary-action:hover {
  color: var(--text-bright);
  border-color: var(--border-strong);
}
.btn#btn-wire.active {
  color: #bfe5ff; border-color: #5eb8ff;
  background: linear-gradient(180deg, rgba(31,90,132,.98), rgba(18,61,93,.98));
  box-shadow: 0 0 0 2px rgba(94,184,255,.18), 0 0 18px rgba(94,184,255,.28);
}
.btn#btn-move.active {
  color: #d6c7ff; border-color: #9b87ff;
  background: linear-gradient(180deg, rgba(65,52,108,.98), rgba(43,34,78,.98));
  box-shadow: 0 0 0 2px rgba(155,135,255,.18), 0 0 18px rgba(155,135,255,.24);
}
.btn#btn-delete.active {
  color: #ffd1d5; border-color: #ff707b;
  background: linear-gradient(180deg, rgba(105,35,45,.98), rgba(72,23,31,.98));
  box-shadow: 0 0 0 2px rgba(255,112,123,.18), 0 0 18px rgba(255,112,123,.24);
}
.code-clear-btn { margin-left: auto; }

/* ============================================================
   SIM PANEL & CANVAS
   ============================================================ */
#sim-panel {
  flex: 1; min-width: 0; display: flex; flex-direction: column;
  overflow: hidden; position: relative;
}
#canvas-container {
  flex: 1; min-height: 0; position: relative; overflow: hidden;
  background:
    radial-gradient(ellipse at 30% 25%, rgba(94,184,255,0.07), transparent 32%),
    radial-gradient(ellipse at 75% 70%, rgba(69,217,167,0.06), transparent 30%),
    linear-gradient(180deg, rgba(6,13,20,1), rgba(7,14,22,1));
}
/* grid overlay */
#canvas-container::before {
  content: ''; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.032) 1px, transparent 1px);
  background-size: 26px 26px;
  opacity: 0.5; pointer-events: none; z-index: 0;
}
canvas {
  display: block; position: absolute; top: 0; left: 0;
  transform-origin: 0 0; cursor: crosshair; z-index: 2;
}

/* ── Zoom badge ── */
#zoom-badge {
  position: absolute; z-index: 12;
  border-radius: 999px;
  background: rgba(6,13,20,0.85);
  border: 1px solid var(--border);
  color: var(--text-dim);
  backdrop-filter: blur(12px); box-shadow: var(--shadow-sm);
  top: 16px; left: 16px; padding: 8px 14px;
  font-size: 10px; font-weight: 600; display: none;
}

/* ── Connection alert ── */
@keyframes alertPop {
  from { transform: translateX(-50%) scale(0.88); opacity: 0; }
  to   { transform: translateX(-50%) scale(1);    opacity: 1; }
}
.conn-alert {
  position: absolute; top: 20px; left: 50%; transform: translateX(-50%);
  z-index: 200; max-width: min(500px, calc(100% - 24px));
  padding: 12px 40px 12px 16px; border-radius: 14px;
  border: 1px solid rgba(255,112,123,0.42);
  background: rgba(50,14,20,0.88); color: #ffbac2;
  font-size: 11px; font-weight: 600; text-align: center;
  box-shadow: var(--shadow-md); backdrop-filter: blur(14px);
  animation: alertPop 0.3s cubic-bezier(0.34,1.56,0.64,1) both;
}
.conn-alert.hidden { display: none; }
.conn-close {
  position: absolute; right: 12px; top: 50%; transform: translateY(-50%);
  cursor: pointer; color: inherit; opacity: 0.8; font-size: 14px;
  transition: opacity 0.15s;
}
.conn-close:hover { opacity: 1; }

/* ── Serial monitor ── */
@keyframes serialPop {
  from { transform: scale(0.82); opacity: 0; }
  to   { transform: scale(1);    opacity: 1; }
}
#serial-monitor {
  position: absolute; right: 18px; bottom: 18px;
  width: 340px; height: 240px;
  display: none; flex-direction: column;
  z-index: 120; border-radius: 20px;
  border: 1px solid var(--border-strong);
  background: rgba(7,14,22,0.94);
  box-shadow: var(--shadow-lg); backdrop-filter: blur(16px);
  overflow: hidden; transform-origin: bottom right;
}
#serial-monitor.visible {
  display: flex;
  animation: serialPop 0.28s cubic-bezier(0.34,1.56,0.64,1) both;
}
.serial-header {
  min-height: 46px; padding: 0 14px;
  display: flex; align-items: center; justify-content: space-between;
  background: linear-gradient(180deg, rgba(15,28,42,0.96), rgba(11,20,31,0.96));
  border-bottom: 1px solid var(--border);
}
@keyframes serialBlink {
  0%,90%,100% { opacity: 1; }
  95%          { opacity: 0.3; }
}
.serial-title {
  color: var(--green); font-size: 10px; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  animation: badgePulse 2s ease-in-out infinite;
}
.serial-close { color: var(--text-dim); font-size: 15px; cursor: pointer; transition: color 0.15s; }
.serial-close:hover { color: var(--red); }
#serial-output {
  flex: 1; padding: 12px 14px; overflow-y: auto;
  font-size: 10px; line-height: 1.6; color: var(--green); font-family: var(--font-mono);
}
#serial-input-row {
  display: flex; border-top: 1px solid var(--border); background: rgba(9,18,28,0.9);
}
#serial-input {
  flex: 1; border: none; outline: none; padding: 12px;
  background: transparent; color: var(--text-bright);
  font-size: 11px; font-family: var(--font-mono);
}
#serial-input::placeholder { color: var(--text-dim); }
#serial-send {
  min-width: 86px; border: none; border-left: 1px solid var(--border);
  background: rgba(94,184,255,0.08); color: var(--accent);
  font-family: var(--font-ui); font-size: 11px; font-weight: 700;
  cursor: pointer; transition: background 0.2s;
}
#serial-send:hover { background: rgba(94,184,255,0.16); }

/* ============================================================
   COMPONENT PALETTE
   ============================================================ */
@keyframes paletteEntry {
  from { transform: translateY(28px); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}
#palette-wrapper {
  background: linear-gradient(180deg, rgba(9,17,26,0.96), rgba(7,13,20,0.96));
  border-top: 1px solid var(--border);
  box-shadow: 0 -8px 28px rgba(0,0,0,0.22);
  flex-shrink: 0; position: relative;
  animation: paletteEntry 0.6s cubic-bezier(0.22,1,0.36,1) 0.2s both;
}
#palette-toggle {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 18px; cursor: pointer; gap: 14px;
  color: var(--text);
  transition: color 0.2s, background 0.2s;
  -webkit-tap-highlight-color: transparent; user-select: none;
}
#palette-toggle:hover { color: var(--text-bright); background: rgba(94,184,255,0.04); }
.palette-toggle-main { display: flex; align-items: center; gap: 12px; }
#palette-arrow {
  width: 28px; height: 28px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 50%; background: rgba(94,184,255,0.10); color: var(--accent);
  flex-shrink: 0; font-size: 14px;
  transition: transform 0.3s cubic-bezier(0.34,1.56,0.64,1), background 0.2s;
}
#palette-toggle:hover #palette-arrow { background: rgba(94,184,255,0.20); transform: scale(1.1); }
.palette-heading { display: flex; flex-direction: column; gap: 2px; }
.palette-kicker  { font-size: 9px; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-dim); }
.palette-title   { font-size: 14px; font-weight: 700; color: var(--text-bright); }
.palette-subtitle{ font-size: 9px; font-weight: 500; color: var(--text-dim); letter-spacing: 0.04em; opacity: 0.7; margin-top: 1px; }
#palette-open-label { display: none; font-size: 10px; font-weight: 600; color: var(--text-dim); white-space: nowrap; }

#palette-body {
  overflow: hidden; max-height: 300px; opacity: 1;
  transition: max-height 0.28s ease, opacity 0.22s ease;
}
#palette-body.closed { max-height: 0; opacity: 0; }

/* ── Category tabs ── */
#palette-cats {
  display: flex; gap: 6px; padding: 4px 14px 12px;
  overflow-x: auto; scrollbar-width: none; -webkit-overflow-scrolling: touch;
}

#palette-cats::-webkit-scrollbar { display: none; }

.cat-tab {
  padding: 9px 16px; border-radius: 999px; flex-shrink: 0;
  background: rgba(255,255,255,0.02); border: 1px solid transparent;
  color: var(--text-dim); font-size: 10px; font-weight: 700; white-space: nowrap;
  cursor: pointer; position: relative;
  transition: background 0.2s, color 0.2s, border-color 0.2s, box-shadow 0.2s, transform 0.15s;
  -webkit-tap-highlight-color: transparent; user-select: none;
}

.cat-tab:hover { color: var(--text-bright); border-color: var(--border); transform: translateY(-1px); }
.cat-tab.active {
  color: var(--accent); border-color: rgba(94,184,255,0.35);
  background: rgba(94,184,255,0.08); box-shadow: 0 0 10px rgba(94,184,255,0.08);
}
/* scanline glitch on active hover */
@keyframes scanGlitch { 0% { opacity:0; } 50% { opacity:1; transform:translateY(-2px); } 100% { opacity:0; } }
.cat-tab.active:hover::after {
  content: ''; position: absolute; inset: 0;
  background: repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(94,184,255,0.06) 2px, rgba(94,184,255,0.06) 4px);
  animation: scanGlitch 0.18s steps(2) 1; pointer-events: none;
}
.cat-tab[data-cat="lights"].active    { color: var(--yellow); border-color: rgba(255,202,95, 0.32); background: rgba(255,202,95, 0.08); box-shadow: 0 0 10px rgba(255,202,95, 0.08); }
.cat-tab[data-cat="sensors"].active   { color: var(--green);  border-color: rgba(69,217,167,0.32); background: rgba(69,217,167,0.08); box-shadow: 0 0 10px rgba(69,217,167,0.08); }
.cat-tab[data-cat="inputs"].active    { color: #b392f0; border-color: rgba(179,146,240,0.32); background: rgba(179,146,240,0.08); box-shadow: 0 0 10px rgba(179,146,240,0.08); }
.cat-tab[data-cat="peripherals"].active { color: var(--orange); border-color: rgba(255,160,112,0.32); background: rgba(255,160,112,0.08); box-shadow: 0 0 10px rgba(255,160,112,0.08); }

/* ── Component items ── */
#component-palette {
  display: flex; gap: 10px; padding: 0 18px 16px;
  overflow-x: auto; scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent;
}
@keyframes compFadeIn {
  from { transform: translateY(6px) scale(0.96); opacity: 0; }
  to   { transform: translateY(0)   scale(1);    opacity: 1; }
}
.comp-item {
  min-width: 96px; padding: 12px 12px 10px; border-radius: 18px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(16,28,42,0.95), rgba(12,22,33,0.95));
  color: var(--text); cursor: pointer;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 6px; text-align: center; flex-shrink: 0;
  transition: transform 0.22s cubic-bezier(0.34,1.56,0.64,1),
              border-color 0.2s, box-shadow 0.2s, color 0.2s, background 0.2s;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.03);
  -webkit-tap-highlight-color: transparent; user-select: none;
  position: relative; overflow: hidden;
}
@keyframes iconBounce {
  0%   { transform: scale(1)    translateY(0);  }
  40%  { transform: scale(1.18) translateY(-4px); }
  70%  { transform: scale(0.96) translateY(1px);  }
  100% { transform: scale(1)    translateY(0);  }
}
.comp-item:hover .comp-icon { animation: iconBounce 0.4s cubic-bezier(0.34,1.56,0.64,1); }
.comp-item:hover { transform: translateY(-4px) scale(1.03); color: var(--text-bright); border-color: var(--border-strong); box-shadow: var(--shadow-sm); }
.comp-item:active { transform: translateY(0) scale(0.96); }
.comp-icon  { font-size: 21px; line-height: 1; display: block; }
.comp-name  { font-size: 10px; font-weight: 700; line-height: 1.35; }

/* per-category glow on hover */
.comp-item[data-cat="mcu"]:hover         { border-color: rgba(94,184,255,0.55);  box-shadow: 0 6px 24px rgba(94,184,255,0.18),  inset 0 1px 0 rgba(255,255,255,0.04); background: linear-gradient(180deg,rgba(18,44,68,0.98), rgba(12,30,48,0.98)); }
.comp-item[data-cat="lights"]:hover      { border-color: rgba(255,202,95,0.55);  box-shadow: 0 6px 24px rgba(255,202,95,0.18),  inset 0 1px 0 rgba(255,255,255,0.04); background: linear-gradient(180deg,rgba(52,42,16,0.98), rgba(38,30,12,0.98)); }
.comp-item[data-cat="sensors"]:hover     { border-color: rgba(69,217,167,0.55);  box-shadow: 0 6px 24px rgba(69,217,167,0.18),  inset 0 1px 0 rgba(255,255,255,0.04); background: linear-gradient(180deg,rgba(14,46,36,0.98), rgba(10,34,26,0.98)); }
.comp-item[data-cat="inputs"]:hover      { border-color: rgba(179,146,240,0.55); box-shadow: 0 6px 24px rgba(179,146,240,0.18), inset 0 1px 0 rgba(255,255,255,0.04); background: linear-gradient(180deg,rgba(43,32,68,0.98), rgba(28,22,48,0.98)); }
.comp-item[data-cat="peripherals"]:hover { border-color: rgba(255,160,112,0.55); box-shadow: 0 6px 24px rgba(255,160,112,0.18), inset 0 1px 0 rgba(255,255,255,0.04); background: linear-gradient(180deg,rgba(50,30,16,0.98), rgba(38,22,12,0.98)); }

/* ============================================================
   WIRE TIP TOAST
   ============================================================ */
.wire-tip-toast {
  position: absolute; bottom: 20px; left: 50%;
  transform: translateX(-50%) translateY(16px);
  z-index: 300; padding: 10px 38px 10px 14px;
  border-radius: 12px; border: 1px solid rgba(94,184,255,0.28);
  background: rgba(8,18,30,0.93); color: var(--text);
  font-size: 10.5px; font-weight: 500; white-space: nowrap;
  backdrop-filter: blur(14px); box-shadow: var(--shadow-md);
  opacity: 0; pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.22,1,0.36,1);
}
.wire-tip-toast.visible  { opacity: 1; transform: translateX(-50%) translateY(0); pointer-events: auto; }
.wire-tip-toast.hidden   { display: none; }
.wire-tip-close {
  position: absolute; right: 11px; top: 50%; transform: translateY(-50%);
  cursor: pointer; color: var(--text-dim); font-size: 14px; line-height: 1; padding: 4px;
  transition: color 0.15s;
}
.wire-tip-close:hover { color: var(--red); }

.connection-toast {
  position: absolute; top: 82px; left: 50%; z-index: 300;
  transform: translateX(-50%) translateY(-6px);
  max-width: min(440px, calc(100% - 24px));
  padding: 8px 13px; border-radius: 10px;
  border: 1px solid rgba(69,217,167,0.35);
  background: rgba(7,28,25,0.94); color: #9ff2d2;
  font-size: 10px; font-weight: 600; text-align: center;
  box-shadow: var(--shadow-md); opacity: 0; pointer-events: none;
  transition: opacity .2s ease, transform .2s ease;
}

.component-search-wrap { padding: 10px 14px 8px; }
.component-search {
  width: 100%; box-sizing: border-box; min-height: 36px; padding: 9px 12px;
  border: 1px solid var(--border); border-radius: 10px;
  background: rgba(255,255,255,0.04); color: var(--text);
  font: inherit; outline: none;
}
.component-search:focus { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(94,184,255,0.12); }
.component-search::placeholder { color: var(--text-dim); }
.connection-toast.visible { opacity: 1; transform: translateX(-50%) translateY(0); }
.connection-toast.hidden { display: none; }

/* ============================================================
   COMPONENT TOOLTIP
   ============================================================ */
#comp-tooltip {
  position: absolute; z-index: 300; pointer-events: none;
  min-width: 140px; max-width: 220px; padding: 10px 13px;
  border-radius: 12px; border: 1px solid var(--border-strong);
  background: rgba(8,16,26,0.95);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4), 0 0 0 1px rgba(94,184,255,0.06);
  backdrop-filter: blur(16px); font-family: var(--font-mono); font-size: 9px; color: var(--text-dim);
  opacity: 0; transform: translateY(6px);
  transition: opacity 0.18s ease, transform 0.18s ease; display: none;
}
#comp-tooltip.visible { display: block; opacity: 1; transform: translateY(0); }
#comp-tooltip .tt-title {
  font-family: var(--font-display); font-size: 9px; color: var(--accent);
  letter-spacing: 0.1em; text-transform: uppercase;
  margin-bottom: 7px; padding-bottom: 6px; border-bottom: 1px solid var(--border);
}
#comp-tooltip .tt-pin-row { display: flex; align-items: center; gap: 6px; padding: 2px 0; }
#comp-tooltip .tt-pin-dot { width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0; }
#comp-tooltip .tt-pin-name { color: var(--text-bright); font-weight: 700; font-size: 9px; min-width: 36px; }
#comp-tooltip .tt-pin-type { color: var(--text-dim); font-size: 8px; opacity: 0.7; }

/* ── Spark canvas ── */
#spark-canvas { position: absolute; top: 0; left: 0; pointer-events: none; z-index: 10; }

/* ============================================================
   SCROLLBARS
   ============================================================ */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(116,169,221,0.22); border-radius: 999px; }
::-webkit-scrollbar-thumb:hover { background: rgba(116,169,221,0.40); }

/* ============================================================
   HELP BUTTON
   ============================================================ */
.help-btn {
  color: var(--accent);
  border-color: rgba(94,184,255,0.35);
  background: linear-gradient(180deg, rgba(16,40,64,0.92), rgba(10,28,48,0.92));
}
.help-btn:hover {
  color: var(--text-bright);
  border-color: rgba(94,184,255,0.6);
  box-shadow: 0 0 18px rgba(94,184,255,0.20);
}
.help-btn-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 17px; height: 17px; border-radius: 50%;
  border: 1.5px solid currentColor;
  font-size: 11px; font-weight: 800; line-height: 1;
  flex-shrink: 0;
}

/* ============================================================
   HELP MODAL — OVERLAY
   ============================================================ */
.help-overlay {
  position: fixed; inset: 0; z-index: 9000;
  background: rgba(4, 9, 16, 0.82);
  backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  padding: 16px;
  transition: opacity 0.28s ease;
}
.help-hidden  { display: none !important; }
.help-visible { display: flex; opacity: 1; }
.help-hiding  { display: flex; opacity: 0; pointer-events: none; }

/* ============================================================
   HELP MODAL — BOX
   ============================================================ */
@keyframes helpModalIn {
  from { transform: scale(0.90) translateY(24px); opacity: 0; }
  to   { transform: scale(1)    translateY(0);    opacity: 1; }
}
.help-modal {
  width: 100%; max-width: 710px;
  max-height: min(92vh, 860px);
  display: flex; flex-direction: column;
  background: linear-gradient(175deg, rgba(10,20,32,0.99), rgba(7,14,22,0.99));
  border: 1px solid var(--border-strong);
  border-radius: 24px;
  box-shadow: 0 32px 80px rgba(0,0,0,0.55), 0 0 0 1px rgba(94,184,255,0.07);
  overflow: hidden;
  animation: helpModalIn 0.32s cubic-bezier(0.22,1,0.36,1) both;
}

/* ============================================================
   HELP MODAL — HEADER
   ============================================================ */
.help-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px 18px;
  background: linear-gradient(180deg, rgba(14,28,44,0.98), rgba(10,20,32,0.96));
  border-bottom: 1px solid var(--mode-color-border);
  box-shadow: 0 1px 12px var(--mode-color-dim);
  flex-shrink: 0;
}
.help-title-block { display: flex; flex-direction: column; gap: 3px; }
.help-modal-logo {
  font-family: var(--font-display); font-size: 22px; font-weight: 800;
  color: var(--text-bright); letter-spacing: 0.04em;
}
.help-modal-logo span { color: var(--cyan); text-shadow: 0 0 14px rgba(56,216,234,0.5); }
.help-modal-sub {
  font-size: 10px; font-weight: 600; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--text-dim);
}
.help-close-btn {
  width: 34px; height: 34px; border-radius: 50%;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.04);
  color: var(--text-dim); font-size: 20px; line-height: 1;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: color 0.2s, background 0.2s, border-color 0.2s;
  flex-shrink: 0;
}
.help-close-btn:hover { color: var(--red); border-color: rgba(255,112,123,0.4); background: rgba(255,112,123,0.08); }

/* ============================================================
   HELP MODAL — TABS
   ============================================================ */
.help-tabs {
  display: flex; gap: 4px; padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: rgba(8,16,26,0.95);
  flex-shrink: 0; overflow-x: auto; scrollbar-width: none;
}
.help-tabs::-webkit-scrollbar { display: none; }
.help-tab {
  padding: 9px 16px 11px; border-radius: 10px 10px 0 0;
  border: 1px solid transparent; border-bottom: none;
  background: transparent; color: var(--text-dim);
  font-family: var(--font-ui); font-size: 11px; font-weight: 700;
  cursor: pointer; white-space: nowrap;
  transition: color 0.2s, background 0.2s, border-color 0.2s;
  position: relative; bottom: -1px;
}
.help-tab:hover { color: var(--text-bright); background: rgba(94,184,255,0.05); }
.help-tab.active {
  color: var(--mode-color);
  background: linear-gradient(180deg, rgba(12,24,38,0.96), rgba(10,20,32,0.96));
  border-color: var(--border);
  border-bottom-color: rgba(10,20,32,0.96);
}

/* ============================================================
   HELP MODAL — BODY & PANES
   ============================================================ */
.help-body {
  flex: 1; min-height: 0; overflow-y: auto;
  padding: 24px 24px 8px;
  scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent;
}
.help-body::-webkit-scrollbar { width: 4px; }
.help-body::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 999px; }

.help-pane { display: none; }
.help-pane.active { display: block; }

.help-intro {
  font-size: 12px; line-height: 1.75; color: var(--text);
  margin-bottom: 20px; padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.help-intro strong { color: var(--mode-color); font-weight: 700; }

/* ============================================================
   HELP STEPS
   ============================================================ */
.help-step {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 14px 0; border-bottom: 1px solid var(--border);
}
.help-step:last-of-type { border-bottom: none; }
.help-step-badge {
  flex-shrink: 0; min-width: 34px; height: 34px;
  border-radius: 10px;
  background: var(--mode-color-bg);
  border: 1px solid var(--mode-color-border);
  color: var(--mode-color);
  font-family: var(--font-display); font-size: 13px; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
}
.help-step-content { flex: 1; }
.help-step-badge.bend-badge { font-size: 13px; line-height: 1; }
.help-step-title {
  font-size: 12px; font-weight: 700; color: var(--text-bright);
  margin-bottom: 4px;
}
.help-step-desc {
  font-size: 11px; line-height: 1.7; color: var(--text);
}
.help-step-desc strong { color: var(--text-bright); font-weight: 700; }
.help-step-desc em     { color: var(--accent); font-style: normal; font-weight: 600; }
.help-step-desc code {
  font-family: var(--font-mono); font-size: 10px;
  background: rgba(94,184,255,0.10); color: var(--accent);
  padding: 1px 5px; border-radius: 5px;
  border: 1px solid rgba(94,184,255,0.18);
}
.help-step-desc kbd {
  font-family: var(--font-mono); font-size: 10px;
  background: rgba(255,255,255,0.07); color: var(--text-bright);
  padding: 1px 6px; border-radius: 5px;
  border: 1px solid var(--border-strong);
  box-shadow: 0 1px 0 var(--border-strong);
}

/* ============================================================
   HELP TIP BOX
   ============================================================ */
.help-tip {
  margin: 18px 0 6px;
  padding: 12px 16px; border-radius: 12px;
  background: rgba(94,184,255,0.06);
  border: 1px solid rgba(94,184,255,0.22);
  font-size: 11px; line-height: 1.7; color: var(--text);
}
.help-tip strong { color: var(--accent); font-weight: 700; }
.help-tip kbd {
  font-family: var(--font-mono); font-size: 10px;
  background: rgba(255,255,255,0.07); color: var(--text-bright);
  padding: 1px 6px; border-radius: 5px;
  border: 1px solid var(--border-strong);
  box-shadow: 0 1px 0 var(--border-strong);
}

/* ============================================================
   COMPONENT GRID (Components tab)
   ============================================================ */
.help-comp-section-title {
  font-size: 10px; font-weight: 700; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--text-dim);
  padding: 14px 0 8px; border-top: 1px solid var(--border);
  margin-top: 6px;
}
.help-comp-section-title:first-child { border-top: none; padding-top: 0; }
.help-comp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 10px; margin-bottom: 4px;
}
.help-comp-card {
  padding: 12px 14px; border-radius: 14px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(14,26,40,0.95), rgba(10,20,30,0.95));
  display: flex; flex-direction: column; gap: 6px;
  transition: border-color 0.2s, background 0.2s;
}
.help-comp-card:hover { border-color: var(--border-strong); background: linear-gradient(180deg,rgba(18,34,52,0.98),rgba(12,24,36,0.98)); }
.help-comp-top { display: flex; align-items: center; gap: 8px; }
.help-comp-icon { font-size: 18px; line-height: 1; flex-shrink: 0; }
.help-comp-card strong { font-size: 11px; font-weight: 700; color: var(--text-bright); }
.help-comp-card span {
  font-size: 10px; line-height: 1.6; color: var(--text-dim);
}
.help-comp-card span code {
  font-family: var(--font-mono); font-size: 9.5px;
  background: rgba(94,184,255,0.10); color: var(--accent);
  padding: 1px 4px; border-radius: 4px;
  border: 1px solid rgba(94,184,255,0.18);
}

/* ============================================================
   SHORTCUTS TAB
   ============================================================ */
.help-shortcut-section {
  font-size: 10px; font-weight: 700; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--text-dim);
  padding: 14px 0 8px; border-top: 1px solid var(--border);
  margin-top: 4px;
}
.help-shortcut-section:first-child { border-top: none; padding-top: 0; }
.help-shortcut-table { display: flex; flex-direction: column; gap: 2px; margin-bottom: 4px; }
.help-shortcut-row {
  display: flex; align-items: center; gap: 16px;
  padding: 8px 12px; border-radius: 9px;
  transition: background 0.15s;
}
.help-shortcut-row:hover { background: rgba(94,184,255,0.05); }
.help-shortcut-keys {
  min-width: 160px; display: flex; align-items: center; gap: 4px; flex-shrink: 0;
  font-size: 10px; color: var(--text-bright);
}
.help-shortcut-keys kbd {
  font-family: var(--font-mono); font-size: 10px;
  background: rgba(255,255,255,0.07); color: var(--text-bright);
  padding: 2px 7px; border-radius: 5px;
  border: 1px solid var(--border-strong);
  box-shadow: 0 1px 0 var(--border-strong);
  white-space: nowrap;
}
.help-shortcut-label { font-size: 11px; color: var(--text); }

/* ============================================================
   HELP MODAL — FOOTER
   ============================================================ */
.help-footer {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px;
  background: linear-gradient(180deg, rgba(8,16,26,0.96), rgba(6,12,20,0.98));
  border-top: 1px solid var(--border);
  flex-shrink: 0; gap: 12px; flex-wrap: wrap;
}
.help-footer-left { display: flex; flex-direction: column; gap: 2px; min-width: 0; flex: 1 1 220px; }
.help-footer-brand {
  font-family: var(--font-display); font-size: 13px; font-weight: 800;
  color: var(--text-bright);
}
.help-footer-uni {
  font-size: 9px; font-weight: 600; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--text-dim);
}
.help-footer-btn {
  min-width: 104px;
  justify-content: center;
}

/* ============================================================
   Logo Link to Main Website
   ============================================================ */
.logo {
  display: inline-block;
  text-decoration: none;
  color: inherit;
}

/* ============================================================
   RESPONSIVE — TABLET
   ============================================================ */
@media (max-width: 980px) {
  #code-panel { width: 44%; min-width: 280px; }
  #status { max-width: 200px; }
}

/* ============================================================
   RESPONSIVE — MOBILE  (kept LAST so it always wins)
   ============================================================ */
@media (max-width: 640px) {
  :root {
    --toolbar-h: 60px;
    --tab-bar-h: 54px;
  }

  html, body {
    padding-bottom: env(safe-area-inset-bottom, 0px);
  }

  #mobile-tab-bar {
    display: flex;
    flex-direction: row;
    width: 100%;
  }

  #app {
    height: calc(
      100vh
      - var(--toolbar-h)
      - var(--tab-bar-h)
      - env(safe-area-inset-bottom, 0px)
    );
    height: calc(
      100dvh
      - var(--toolbar-h)
      - var(--tab-bar-h)
      - env(safe-area-inset-bottom, 0px)
    );
  }

  /* ── Brand ── */
  .brand-block  { min-width: 112px; }
  .brand-badge  { display: block; font-size: 6px; letter-spacing: .04em; }
  .logo         { font-size: 14px; }

  /* ── Toolbar ── */
  .toolbar-sep, #status, #btn-toggle-code { display: none; }
  #toolbar { gap: 6px; padding: 0 10px; overflow-x: auto; overflow-y: hidden; }

  /* ── Buttons: icon-only on mobile ── */
  .btn { min-height: 34px; padding: 7px 9px; font-size: 10px; gap: 4px; }
  .btn .btn-label { display: none; }
  .btn.icon-only { width: 34px; padding: 0; }
  .seg .btn { min-height: 30px; padding: 5px 9px; }
  #code-buttons { gap: 8px; padding: 10px; }
  #code-buttons .btn { flex: 1 1 0; min-width: 0; justify-content: center; }
  .code-clear-btn { margin-left: 0; flex-basis: auto; }

  /* ── Layout ── */
  #main-container { flex-direction: column; position: relative; }

  /* ── Code panel ── */
  #code-panel {
    position: absolute;
    inset: 0;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    border-right: none;
    border-bottom: 1px solid var(--border);
    z-index: 30;
    display: none;
  }
  #code-panel.mobile-active { display: flex; }
  #code-buttons { flex-shrink: 0; }

  /* ── Sim panel ── */
  #sim-panel {
    position: absolute;
    inset: 0;
    z-index: 10;
    padding-bottom: 72px;
  }
  #sim-panel.mobile-hidden { display: none; }

  #canvas-container {
    position: absolute;
    inset: 0;
  }

  /* ── Palette: floating bottom sheet ── */
  #palette-wrapper {
    position: fixed;
    left: 10px;
    right: 10px;
    bottom: calc(10px + env(safe-area-inset-bottom, 0px));
    top: auto;
    z-index: 40;
    border: 1px solid var(--border-strong);
    border-radius: 22px;
    box-shadow: var(--shadow-lg);
    background: rgba(7, 14, 22, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    overflow: hidden;
    max-height: calc(55vh - env(safe-area-inset-bottom, 0px));
  }

  #palette-toggle { padding: 12px 14px; }
  .palette-title  { font-size: 13px; }
  .palette-subtitle { display: none; }

  #palette-body {
    max-height: calc(42vh - env(safe-area-inset-bottom, 0px));
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  #palette-cats { padding: 0 12px 10px; gap: 8px; }
  .cat-tab { padding: 10px 12px; font-size: 10px; }

  #component-palette {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    padding: 0 12px 16px;
    max-height: none;
    overflow: visible;
  }
  .comp-item {
    min-width: 0;
    width: 100%;
    padding: 12px 10px;
  }
  .comp-icon { font-size: 22px; }
  .comp-name { font-size: 11px; }

  /* ── Wire tip toast ── */
  .wire-tip-toast {
    white-space: normal;
    left: 12px;
    right: 12px;
    top: calc(var(--toolbar-h) + 12px);
    bottom: auto;
    transform: translateX(0) translateY(8px);
    width: auto;
  }
  .wire-tip-toast.visible { transform: translateX(0) translateY(0); }
  .connection-toast { top: calc(var(--toolbar-h) + 12px); }

  #zoom-badge { top: 12px; left: 12px; }

  /* ── Serial monitor: sits above palette ── */
  #serial-monitor {
    left: 12px;
    right: 12px;
    width: auto;
    bottom: calc(82px + env(safe-area-inset-bottom, 0px));
    height: min(36vh, 260px);
  }

  #comp-tooltip { display: none !important; }
  #mode-badge   { display: none; }

  /* ── Help modal ── */
  .help-overlay { padding: 0; align-items: flex-end; }
  .help-modal {
    max-width: 100%; max-height: 92vh;
    border-radius: 22px 22px 0 0;
    border-bottom: none;
  }
  .help-header { padding: 16px 18px 14px; }
  .help-modal-logo { font-size: 18px; }
  .help-tabs { padding: 10px 14px 0; gap: 2px; }
  .help-tab  { padding: 8px 11px 10px; font-size: 10px; }
  .help-body { padding: 18px 16px 6px; }
  .help-comp-grid { grid-template-columns: 1fr 1fr; }
  .help-shortcut-keys { min-width: 120px; }
  .help-footer { padding: 14px 18px; align-items: stretch; }
  .help-footer-left { flex-basis: 100%; }
  .help-footer-btn { width: 100%; min-height: 38px; }
}