:root {
  --bg-dark: #121418;
  --panel-bg: #1a1d24;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --border-color: #2e3440;
  --input-bg: #0f1115;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg-dark);
  color: var(--text-main);
  position: relative;
}

/* PASEK BOCZNY - Sztywne zakotwiczenie do lewej krawędzi okna */
#sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 360px;
  height: 100vh;
  background-color: var(--panel-bg);
  border-right: 1px solid var(--border-color);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  overflow-y: auto;
  z-index: 100;
  box-shadow: 4px 0 15px rgba(0, 0, 0, 0.5);
}

.brand-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 15px;
}

.brand-header h1 {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: #fff;
}

.brand-header span {
  color: var(--accent);
}

.brand-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.section-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-main);
}

.tooltip-icon {
  cursor: help;
  color: var(--accent);
  font-weight: bold;
  margin-left: 4px;
}

input[type="number"] {
  width: 90px;
  background-color: var(--input-bg);
  border: 1px solid var(--border-color);
  color: #fff;
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 0.9rem;
  text-align: right;
  outline: none;
  transition: border-color 0.2s;
}

input[type="number"]:focus {
  border-color: var(--accent);
}

.btn-primary {
  background-color: var(--accent);
  color: #fff;
  border: none;
  padding: 12px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background-color 0.2s, transform 0.1s;
  margin-top: auto;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
}

.btn-primary:active {
  transform: scale(0.98);
}

/* KONTENER OBSZARU 3D - Wypełnia całe pozostałe miejsce od 360px w prawo */
#viewport {
  position: absolute;
  top: 0;
  left: 360px;
  width: calc(100vw - 360px);
  height: 100vh;
  overflow: hidden;
}

/* CANVAS THREE.JS - Wypełnia dokładnie swój kontener #viewport */
#viewport canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
  outline: none;
}

.view-badge {
  position: absolute;
  bottom: 20px;
  right: 20px;
  background: rgba(15, 17, 21, 0.8);
  border: 1px solid var(--border-color);
  padding: 8px 14px;
  border-radius: 20px;
  font-size: 0.75rem;
  color: var(--text-muted);
  pointer-events: none;
  backdrop-filter: blur(4px);
}