:root {
  --bg: #f6f7fb;
  --bg2: #ffffff;
  --card: rgba(255, 255, 255, .78);
  --border: rgba(10, 14, 30, .10);
  --text: rgba(10, 14, 30, .92);
  --muted: rgba(10, 14, 30, .66);
  --muted2: rgba(10, 14, 30, .52);
  --a1: #12c2ff;
  --a2: #7c5cff;
  --a3: #ff4fa3;
  --a4: #ffb703;
  --shadow: 0 18px 55px rgba(16, 24, 40, .12);
  --r: 18px;
  --line: rgba(10, 14, 30, .10);
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --sans: ui-sans-serif, system-ui, Segoe UI, Roboto, Arial;

  /* înălțime efectivă setată din JS din .topbar (fallback până la primul frame) */
  --pi-panel-top: 72px;
  --pi-pl-w: 300px;
  --pi-pr-w: 300px;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
  font-family: var(--sans);
  color: var(--text);
  background: var(--bg);
  overflow: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: -35%;
  background: conic-gradient(from 180deg,
      color-mix(in srgb, var(--a1) 22%, transparent),
      color-mix(in srgb, var(--a2) 18%, transparent),
      color-mix(in srgb, var(--a3) 16%, transparent),
      color-mix(in srgb, var(--a4) 14%, transparent),
      color-mix(in srgb, var(--a1) 22%, transparent));
  filter: blur(90px);
  opacity: .16;
  animation: floaty 18s ease-in-out infinite;
  pointer-events: none;
}

@keyframes floaty {
  0% { transform: translate(-2%, -1%) rotate(0deg); }
  50% { transform: translate(2%, 1%) rotate(12deg); }
  100% { transform: translate(-2%, -1%) rotate(0deg); }
}

/* TOP BAR */
.topbar {
  flex-shrink: 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 14px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, .82);
  backdrop-filter: blur(10px);
  flex-wrap: wrap;
}

.brand h1 {
  margin: 0;
  font-size: clamp(18px, 2vw, 28px);
  font-weight: 950;
  letter-spacing: .2px;
}

.brand p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
  max-width: 52ch;
  line-height: 1.35;
}

.topbarMeta {
  display: flex;
  gap: 10px;
  align-items: flex-end;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.chip {
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, .75);
  font-size: 12px;
  display: inline-flex;
  gap: 8px;
  align-items: center;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #fff, var(--a1));
  box-shadow: 0 0 18px color-mix(in srgb, var(--a1) 35%, transparent);
}

.mini {
  padding: 8px 10px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, .70);
  min-width: 78px;
}

.mk {
  font-size: 11px;
  color: var(--muted2);
}

.mv {
  font-family: var(--mono);
  font-size: 13px;
  margin-top: 3px;
}

/* MAIN + PANELS */
.layout {
  position: relative;
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.piStageShell {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.panel {
  position: fixed;
  top: var(--pi-panel-top);
  bottom: 0;
  width: var(--pi-pl-w);
  max-width: 100%;
  padding: 10px;
  background: linear-gradient(180deg, #ffffff, #fbfcff);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  overflow: auto;
  z-index: 150;
  transition: transform 0.28s ease;
  -webkit-overflow-scrolling: touch;
}

.panel.left {
  left: 0;
  border-right: 1px solid var(--line);
  box-shadow: 8px 0 24px rgba(15, 23, 42, .08);
}

.panel.right {
  right: 0;
  width: var(--pi-pr-w);
  border-left: 1px solid var(--line);
  box-shadow: -8px 0 24px rgba(15, 23, 42, .08);
}

.panel.left.hidden {
  transform: translateX(-100%);
  pointer-events: none;
}

.panel.right.hidden {
  transform: translateX(100%);
  pointer-events: none;
}

.panelHeader {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.panelHeader h2 {
  margin: 0;
  font-size: 16px;
}

.panelHeaderSpaced {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.panelPad {
  padding: 4px 0 8px;
}

.pi-toggle {
  position: fixed;
  z-index: 210;
  top: calc(var(--pi-panel-top) + 8px);
  width: 44px;
  height: 44px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid #c7d2fe;
  cursor: pointer;
  font-size: 20px;
  line-height: 1;
  font-weight: 800;
  box-shadow: 0 4px 16px rgba(15, 23, 42, .12);
  transition: left 0.28s ease, right 0.28s ease, transform 0.15s ease;
}

.pi-toggle:hover {
  transform: translateY(-1px);
}

.pi-toggle-left {
  background: linear-gradient(180deg, #eef2ff, #e0e7ff);
  color: var(--text);
}

.pi-toggle-right {
  background: linear-gradient(180deg, #f5f3ff, #ede9fe);
  color: var(--text);
}

/* STAGE (simulator — fără margini dinamice; panouri peste) */
.stage.sceneStage {
  position: relative;
  flex: 1;
  min-height: 0;
  width: 100%;
  display: flex;
  flex-direction: column;
  background: rgba(255, 255, 255, .55);
  border: 1px solid var(--border);
  border-radius: var(--r);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
  overflow: hidden;
}

.sceneBar {
  padding: 10px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(10, 14, 30, .08);
  background: linear-gradient(180deg, rgba(255, 255, 255, .82), rgba(255, 255, 255, .58));
  flex-shrink: 0;
}

.barTitle {
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: 15px;
}

.emoji {
  filter: drop-shadow(0 8px 16px rgba(0, 0, 0, .08));
}

.tools {
  display: flex;
  gap: 8px;
}

.sceneWrap {
  flex: 1;
  min-height: 0;
  padding: 10px;
}

canvas {
  width: 100%;
  height: 100%;
  display: block;
  border-radius: 16px;
  border: 1px solid rgba(10, 14, 30, .10);
  background: rgba(255, 255, 255, .65);
}

.iconbtn {
  cursor: pointer;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid rgba(10, 14, 30, .12);
  background: rgba(255, 255, 255, .74);
  color: rgba(10, 14, 30, .86);
  font-size: 15px;
  transition: .12s ease;
}

.iconbtn:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 0 6px rgba(18, 194, 255, .10);
}

.iconbtn:active {
  transform: translateY(1px);
}

.iconbtn.on {
  border-color: color-mix(in srgb, var(--a1) 45%, rgba(10, 14, 30, .12));
  box-shadow: 0 0 0 6px rgba(18, 194, 255, .12);
}

.hudBar {
  padding: 10px 12px;
  border-top: 1px solid rgba(10, 14, 30, .08);
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, .58);
  flex-shrink: 0;
}

.badge {
  padding: 9px 12px;
  border-radius: 999px;
  border: 1px solid rgba(10, 14, 30, .10);
  background: rgba(255, 255, 255, .72);
  font-size: 13px;
  white-space: nowrap;
}

.hud {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.hudItem {
  padding: 8px 10px;
  border-radius: 14px;
  border: 1px solid rgba(10, 14, 30, .10);
  background: rgba(255, 255, 255, .72);
  min-width: 120px;
  display: flex;
  justify-content: space-between;
  gap: 8px;
}

.hk {
  color: var(--muted2);
  font-size: 12px;
}

.hv {
  font-family: var(--mono);
  font-size: 13px;
}

.control {
  margin-bottom: 12px;
}

label {
  display: flex;
  gap: 8px;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 6px;
  color: rgba(10, 14, 30, .86);
  font-size: 13px;
}

.unit {
  color: var(--muted2);
  font-size: 12px;
}

.mono {
  font-family: var(--mono);
}

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

input[type="range"] {
  width: 100%;
  accent-color: var(--a1);
}

input[type="number"] {
  width: 112px;
  padding: 10px 10px;
  border-radius: 14px;
  border: 1px solid rgba(10, 14, 30, .12);
  background: rgba(255, 255, 255, .88);
  color: var(--text);
  outline: none;
}

.btnRow {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 6px;
}

.btn {
  cursor: pointer;
  border: 1px solid rgba(10, 14, 30, .12);
  background: rgba(255, 255, 255, .82);
  color: rgba(10, 14, 30, .92);
  border-radius: 14px;
  padding: 11px 12px;
  font-weight: 950;
  letter-spacing: .2px;
  transition: transform .08s ease, box-shadow .15s ease, background .15s ease;
}

.btn:hover {
  box-shadow: 0 0 0 6px rgba(18, 194, 255, .12);
}

.btn:active {
  transform: translateY(1px) scale(.99);
}

.btn.primary {
  border-color: color-mix(in srgb, var(--a1) 35%, rgba(10, 14, 30, .12));
  background: linear-gradient(135deg,
      color-mix(in srgb, var(--a1) 35%, #ffffff),
      color-mix(in srgb, var(--a2) 28%, #ffffff));
  box-shadow: 0 18px 45px rgba(18, 194, 255, .18);
}

.btn.primary:hover {
  box-shadow: 0 20px 60px rgba(124, 92, 255, .18);
}

.sep {
  height: 1px;
  background: rgba(10, 14, 30, .10);
  margin: 12px 0;
}

.smallMuted {
  color: var(--muted);
  font-size: 13px;
}

.formula {
  border: 1px solid rgba(10, 14, 30, .10);
  background: rgba(255, 255, 255, .76);
  border-radius: 14px;
  padding: 10px 12px;
}

.row2 {
  display: grid;
  grid-template-columns: .7fr 1fr;
  gap: 10px;
  padding: 6px 0;
}

.k {
  color: var(--muted2);
  font-size: 12px;
}

.callout {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px dashed rgba(10, 14, 30, .14);
  background: rgba(255, 255, 255, .70);
  color: rgba(10, 14, 30, .78);
}

.stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.stat {
  padding: 10px 10px;
  border-radius: 14px;
  border: 1px solid rgba(10, 14, 30, .10);
  background: rgba(255, 255, 255, .78);
}

.stat .sk {
  color: var(--muted2);
  font-size: 12px;
  margin-bottom: 5px;
}

.stat .sv {
  font-family: var(--mono);
  font-size: 13px;
}

@media (max-width: 1400px) {
  :root {
    --pi-pl-w: 260px;
    --pi-pr-w: 280px;
  }
}

@media (max-width: 1200px) {
  :root {
    --pi-pl-w: 230px;
    --pi-pr-w: 250px;
  }
}

@media (max-width: 1024px) {
  :root {
    --pi-pl-w: min(86vw, 300px);
    --pi-pr-w: min(86vw, 300px);
  }

  .piStageShell {
    min-height: min(58vh, 560px);
  }

  .brand p {
    font-size: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .panel,
  .pi-toggle {
    transition: none;
  }
}