@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;800&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg-color: #030308;
  --panel-bg: rgba(10, 10, 25, 0.6);
  --panel-border: rgba(255, 255, 255, 0.08);
  --text-color: #f8f9fa;
  --text-muted: #8e9bb0;
  
  /* Color system matching the 3D elements */
  --horizon-color: #00f5d4;
  --meridian-color: #ffb703;
  --equator-color: #00bbf9;
  --tropics-color: #ff007f;
  --polar-color: #90e0ef;
  --terrestrial-color: #9b5de5;
  --earth-color: #4cc9f0;
  --zodiac-color: #ff9f1c;
  --equinox-color: #9b5de5;
  --solstice-color: #ff477e;
  
  --accent-color: #7209b7;
  --accent-glow: rgba(114, 9, 183, 0.4);
  --transition-speed: 0.3s;
}

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

body {
  font-family: 'Outfit', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
  display: flex;
}

#canvas-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

/* Glassmorphic Panel Layout */
.ui-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  display: grid;
  grid-template-columns: 420px 1fr;
  z-index: 2;
  padding: 24px;
  gap: 24px;
}

.sidebar {
  grid-column: 1;
  background: var(--panel-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  padding: 30px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  pointer-events: auto;
  overflow-y: auto;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
  max-height: calc(100vh - 48px);
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.1) transparent;
  
  /* Proprietà collassabili della sidebar */
  position: relative;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  transform: translateX(0);
}

.sidebar.collapsed {
  transform: translateX(calc(-100% - 28px)); /* 24px padding + 4px extra di tolleranza */
}

/* Pulsante Tab laterale per nascondere/mostrare la barra dei controlli */
.sidebar-toggle-btn {
  position: absolute;
  top: 30px;
  right: -40px; /* Si aggancia sul bordo destro della sidebar */
  width: 40px;
  height: 50px;
  background: rgba(10, 10, 25, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--panel-border);
  border-left: none;
  border-radius: 0 10px 10px 0;
  color: var(--text-color);
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: auto;
  box-shadow: 5px 0 15px rgba(0, 0, 0, 0.3);
  transition: all 0.3s ease;
  z-index: 100;
}

.sidebar-toggle-btn:hover {
  background: rgba(20, 20, 45, 0.95);
  color: var(--zodiac-color);
  box-shadow: 5px 0 20px rgba(255, 159, 28, 0.25);
}

/* Ruota l'indicatore a freccia quando la barra è chiusa */
.sidebar.collapsed .sidebar-toggle-btn #toggle-icon {
  transform: rotate(180deg);
  display: inline-block;
  transition: transform 0.3s ease;
}

.sidebar.collapsed .sidebar-toggle-btn {
  box-shadow: 5px 0 20px rgba(0, 245, 212, 0.15);
  border-left: 1px solid var(--panel-border); /* ripristina bordo sinistro quando staccato */
}


.sidebar::-webkit-scrollbar {
  width: 6px;
}

.sidebar::-webkit-scrollbar-thumb {
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
}

/* Typography */
header h1 {
  font-size: 2.2rem;
  font-weight: 800;
  background: linear-gradient(135deg, #fff 30%, var(--earth-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}

header p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.4;
}

h2 {
  font-size: 1.15rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 8px;
  margin-bottom: 12px;
}

/* Control Group styling */
.control-group {
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 12px;
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.03);
}

.slider-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.slider-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.95rem;
  font-weight: 500;
}

.slider-value {
  font-family: 'JetBrains Mono', monospace;
  color: var(--earth-color);
  font-weight: 600;
}

input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.1);
  outline: none;
  margin: 10px 0;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--earth-color);
  cursor: pointer;
  box-shadow: 0 0 10px var(--earth-color);
  transition: transform 0.1s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

/* Play/Pause Buttons & Sim Speed */
.sim-controls {
  display: flex;
  gap: 10px;
}

.btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-color);
  padding: 10px 16px;
  border-radius: 8px;
  font-family: 'Outfit', sans-serif;
  font-weight: 500;
  font-size: 0.9rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex: 1;
  transition: all var(--transition-speed);
}

.btn:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent-color);
  border-color: transparent;
  box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover {
  background: #891cf0;
  box-shadow: 0 4px 20px rgba(114, 9, 183, 0.6);
}

/* Visibility Toggles */
.toggle-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.95rem;
  padding: 4px 0;
}

.toggle-label-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.color-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 6px currentColor;
}

/* Custom Checkbox as Switch */
.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 22px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider-switch {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(255, 255, 255, 0.1);
  transition: .3s;
  border-radius: 34px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.slider-switch:before {
  position: absolute;
  content: "";
  height: 14px;
  width: 14px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: .3s;
  border-radius: 50%;
}

input:checked + .slider-switch {
  background-color: var(--accent-color);
  box-shadow: 0 0 8px var(--accent-glow);
}

input:checked + .slider-switch:before {
  transform: translateX(22px);
}

/* Info Cards for Astronomy Concepts */
.info-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.info-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: 12px;
  padding: 14px;
  cursor: pointer;
  transition: all var(--transition-speed);
}

.info-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.1);
  transform: translateX(4px);
}

.info-card.active {
  background: rgba(114, 9, 183, 0.1);
  border-color: rgba(114, 9, 183, 0.3);
  box-shadow: inset 0 0 10px rgba(114, 9, 183, 0.15);
}

.info-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.info-card-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.4;
  display: none;
  margin-top: 8px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 8px;
}

.info-card.active .info-card-desc {
  display: block;
}

.badge {
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 600;
  text-transform: uppercase;
}

/* Footer style copyright */
footer {
  text-align: center;
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.25);
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Sidebar Overlay for Mobile/Tablet */
.sidebar-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(3, 3, 8, 0.45);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 9;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.sidebar-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

/* Pulsante Menu Fluttuante (visibile a Sfera/Sidebar chiusa) */
.floating-menu-btn {
  position: fixed;
  top: 24px;
  left: 24px;
  z-index: 100; /* Sopra a ogni elemento per garantire click e visibilità */
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  background: rgba(10, 10, 25, 0.85); /* Sfondo scuro semitrasparente */
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1.5px solid rgba(0, 245, 212, 0.4); /* Splendido bordo ciano olografico */
  border-radius: 30px;
  color: var(--text-color);
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5), 0 0 20px rgba(0, 245, 212, 0.2);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  opacity: 0;
  transform: scale(0.9) translateY(-10px);
  pointer-events: none;
}

/* Mostra il bottone tramite JS con classe .visible */
.floating-menu-btn.visible {
  opacity: 1;
  transform: scale(1) translateY(0);
  pointer-events: auto;
}

.floating-menu-btn:hover {
  background: rgba(20, 20, 45, 0.95);
  border-color: var(--horizon-color);
  box-shadow: 0 10px 35px rgba(0, 245, 212, 0.4), 0 0 25px rgba(0, 245, 212, 0.25);
  transform: scale(1.05) translateY(-2px);
}

.floating-menu-btn:active {
  transform: scale(0.98) translateY(0);
}

.floating-menu-btn .menu-icon {
  font-size: 1.2rem;
  color: var(--horizon-color);
}

/* Floating HUD elements for interactive look */
.hud-layer {
  grid-column: 2;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-end;
  padding: 10px;
}

.hud-panel {
  background: var(--panel-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 12px 20px;
  pointer-events: auto;
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.hud-latitude-display {
  display: flex;
  align-items: center;
  gap: 15px;
}

.hud-lat-title {
  font-size: 0.85rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 1px;
}

.hud-lat-val {
  font-size: 1.8rem;
  font-weight: 800;
  font-family: 'JetBrains Mono', monospace;
  color: var(--earth-color);
  text-shadow: 0 0 10px rgba(76, 201, 240, 0.4);
}

.instructions-card {
  align-self: flex-end;
  max-width: 320px;
  background: rgba(10, 10, 25, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 16px;
  pointer-events: auto;
}

.instructions-card h3 {
  font-size: 0.9rem;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--text-color);
}

.instructions-card ul {
  list-style: none;
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.instructions-card li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.instructions-card li::before {
  content: "•";
  color: var(--earth-color);
}

/* Animations and Responsive Styles */
@media (max-width: 900px) {
  body {
    overflow: hidden;
    height: 100vh;
    width: 100vw;
  }
  
  #canvas-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }
  
  .ui-layer {
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    padding: 0;
    pointer-events: none;
    z-index: 2;
  }
  
  /* Sidebar come Cassetto Laterale a comparsa di sinistra */
  .sidebar {
    position: absolute;
    top: 16px;
    left: 16px;
    bottom: 16px;
    width: calc(100% - 80px); /* Lascia almeno 80px a destra per il 3D e il pulsante toggle */
    max-width: 320px;
    max-height: calc(100vh - 32px);
    border-radius: 16px;
    padding: 20px;
    z-index: 10;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.6);
  }
  
  .sidebar.collapsed {
    transform: translateX(calc(-100% - 16px)); /* Slitta fuori dallo schermo allineando la freccia a 0px */
  }
  
  .sidebar-toggle-btn {
    top: 20px;
    right: -40px;
  }

  /* HUD Layer fluttuante in alto a destra su mobile */
  .hud-layer {
    position: absolute;
    top: 16px;
    right: 16px;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    pointer-events: none;
    z-index: 5;
    padding: 0;
  }
  
  .hud-panel {
    pointer-events: auto;
    padding: 8px 14px;
  }

  .hud-lat-val {
    font-size: 1.4rem;
  }
  
  .instructions-card {
    display: none; /* Nasconde istruzioni per risparmiare spazio */
  }

  .floating-menu-btn {
    top: 16px;
    left: 16px;
    padding: 10px 18px;
    font-size: 0.9rem;
  }
}