:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #121a29;
  --bg-tertiary: #1b263b;
  --card-bg: rgba(18, 26, 41, 0.85);
  --card-border: rgba(66, 153, 225, 0.25);
  --accent-cyan: #00e5ff;
  --accent-blue: #0070f3;
  --accent-green: #10b981;
  --accent-yellow: #f59e0b;
  --accent-red: #ef4444;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-glow: 0 0 25px rgba(0, 229, 255, 0.25);
  --shadow-card: 0 12px 30px rgba(0, 0, 0, 0.5);
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
}

/* ==========================================================
   ALAPÉRTELMEZETT VÁSZN ÉS HÁTTÉR
   ========================================================== */
#game-canvas-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

#canvas3d {
  width: 100%;
  height: 100%;
  display: block;
}

/* ==========================================================
   KEZDŐKÉPERNYŐ (START SCREEN)
   ========================================================== */
.overlay-screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at center, rgba(10, 14, 23, 0.75) 0%, rgba(5, 7, 12, 0.95) 100%);
  backdrop-filter: blur(10px);
  transition: opacity 0.4s ease, visibility 0.4s;
}

.overlay-screen.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.start-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-glow), var(--shadow-card);
  border-radius: var(--radius-lg);
  padding: 45px 50px;
  width: 480px;
  max-width: 92vw;
  text-align: center;
  animation: floatUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes floatUp {
  from {
    transform: translateY(30px) scale(0.95);
    opacity: 0;
  }
  to {
    transform: translateY(0) scale(1);
    opacity: 1;
  }
}

.start-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(0, 229, 255, 0.12);
  border: 1px solid rgba(0, 229, 255, 0.3);
  color: var(--accent-cyan);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.game-title {
  font-size: 2.7rem;
  font-weight: 900;
  letter-spacing: 2px;
  background: linear-gradient(135deg, #ffffff 0%, var(--accent-cyan) 60%, var(--accent-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
  text-transform: uppercase;
}

.start-subtitle {
  color: var(--text-secondary);
  font-size: 1.15rem;
  margin-bottom: 12px;
}

.mode-prompt {
  color: var(--accent-cyan);
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 30px;
}

.start-buttons {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.btn {
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  padding: 14px 24px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: var(--transition);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 100%);
  color: #030816;
  box-shadow: 0 4px 15px rgba(0, 229, 255, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(0, 229, 255, 0.55);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateY(-2px);
}

.btn-guest {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(16, 185, 129, 0.28) 100%);
  border: 1px solid var(--accent-green);
  color: #34d399;
}

.btn-guest:hover {
  background: var(--accent-green);
  color: #042f1a;
  transform: translateY(-2px);
  box-shadow: 0 4px 18px rgba(16, 185, 129, 0.4);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
}

/* ==========================================================
   MODÁLIS ABLAKOK (AUTH, GUEST MIGRATION, PROFILE)
   ========================================================== */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(4, 7, 13, 0.85);
  backdrop-filter: blur(8px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s;
}

.modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.modal-window {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-card), var(--shadow-glow);
  border-radius: var(--radius-lg);
  width: 460px;
  max-width: 90vw;
  max-height: 90vh;
  overflow-y: auto;
  padding: 35px;
  position: relative;
  transform: scale(0.92);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-backdrop.active .modal-window {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
  transition: color 0.2s;
}

.modal-close:hover {
  color: var(--accent-red);
}

.modal-header {
  margin-bottom: 24px;
}

.modal-title {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.modal-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.form-group {
  margin-bottom: 18px;
  text-align: left;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  background: rgba(10, 14, 23, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.2);
}

.form-alert {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  margin-bottom: 16px;
  display: none;
}

.form-alert.error {
  display: block;
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid var(--accent-red);
  color: #fca5a5;
}

.form-alert.success {
  display: block;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid var(--accent-green);
  color: #86efac;
}

.modal-footer-links {
  margin-top: 20px;
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.modal-footer-links a {
  color: var(--accent-cyan);
  text-decoration: none;
  font-weight: 600;
  cursor: pointer;
}

.modal-footer-links a:hover {
  text-decoration: underline;
}

/* ==========================================================
   GUEST MIGRATION MODAL SPECIFIKÁCIÓK
   ========================================================== */
.migration-preview {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(0, 229, 255, 0.2);
  border-radius: var(--radius-md);
  padding: 16px;
  margin: 18px 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  text-align: center;
}

.migration-stat-box .label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.migration-stat-box .val {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--accent-cyan);
  margin-top: 4px;
}

/* ==========================================================
   TOP HUD SÁV ÉS NAVIGÁCIÓ
   ========================================================== */
#top-hud {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 70px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(180deg, rgba(10, 14, 23, 0.95) 0%, rgba(10, 14, 23, 0.6) 80%, transparent 100%);
  z-index: 40;
  pointer-events: none;
}

#top-hud * {
  pointer-events: auto;
}

.hud-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.hud-brand {
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: 1px;
  color: var(--accent-cyan);
}

.player-tag {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px;
  background: rgba(18, 26, 41, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 600;
}

.player-tag.guest {
  border-color: rgba(245, 158, 11, 0.4);
  color: var(--accent-yellow);
}

.player-tag.logged-in {
  border-color: rgba(16, 185, 129, 0.4);
  color: #34d399;
}

.btn-convert-guest {
  padding: 5px 12px;
  font-size: 0.78rem;
  background: var(--accent-yellow);
  color: #000;
  border-radius: 999px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: transform 0.2s;
}

.btn-convert-guest:hover {
  transform: scale(1.05);
}

.hud-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-tab-btn {
  background: rgba(18, 26, 41, 0.75);
  color: var(--text-secondary);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.nav-tab-btn:hover, .nav-tab-btn.active {
  background: var(--accent-cyan);
  color: #030816;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 12px rgba(0, 229, 255, 0.35);
}

.hud-stats {
  display: flex;
  align-items: center;
  gap: 20px;
}

.stat-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(18, 26, 41, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 700;
}

.stat-pill .icon {
  color: var(--accent-cyan);
}

.save-indicator {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 700;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid var(--accent-green);
  color: #86efac;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.save-indicator.saving {
  opacity: 1;
  background: rgba(245, 158, 11, 0.15);
  border-color: var(--accent-yellow);
  color: #fcd34d;
}

.save-indicator.saved {
  opacity: 1;
}

/* ==========================================================
   OFFLINE SÁV
   ========================================================== */
#offline-banner {
  position: absolute;
  top: 70px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(239, 68, 68, 0.9);
  color: #fff;
  padding: 8px 24px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 700;
  z-index: 45;
  box-shadow: 0 4px 15px rgba(239, 68, 68, 0.4);
  display: none;
  animation: pulse 2s infinite;
}

#offline-banner.active {
  display: block;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.75; }
}

/* ==========================================================
   GARÁZS NÉZET (GARAGE VIEW)
   ========================================================== */
.view-panel {
  position: absolute;
  top: 70px;
  left: 0;
  width: 100%;
  height: calc(100% - 70px);
  z-index: 30;
  background: rgba(10, 14, 23, 0.92);
  backdrop-filter: blur(8px);
  padding: 30px 40px;
  overflow-y: auto;
  display: none;
}

.view-panel.active {
  display: block;
}

.panel-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.garage-grid {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 30px;
}

@media (max-width: 950px) {
  .garage-grid {
    grid-template-columns: 1fr;
  }
}

.bus-list-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.bus-card-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  cursor: pointer;
  transition: var(--transition);
}

.bus-card-item:hover, .bus-card-item.selected {
  background: rgba(0, 229, 255, 0.08);
  border-color: var(--accent-cyan);
}

.bus-card-info h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.bus-card-info p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.upgrade-matrix {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.upgrade-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.upgrade-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  padding: 16px;
}

.upgrade-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.upgrade-header h5 {
  font-size: 0.95rem;
  font-weight: 700;
}

.level-dots {
  display: flex;
  gap: 4px;
}

.level-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
}

.level-dot.filled {
  background: var(--accent-cyan);
  box-shadow: 0 0 6px var(--accent-cyan);
}

.upgrade-btn {
  width: 100%;
  margin-top: 10px;
  padding: 8px;
  font-size: 0.82rem;
}

/* ==========================================================
   TÉRKÉPEK ÉS ÚTVONALAK (MAPS VIEW)
   ========================================================== */
.routes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.route-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.route-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-4px);
}

.route-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.route-tag {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(0, 229, 255, 0.15);
  color: var(--accent-cyan);
}

/* ==========================================================
   JÁTÉK HUD (DRIVING HUD OVERLAY)
   ========================================================== */
#game-hud {
  position: absolute;
  bottom: 20px;
  left: 20px;
  right: 20px;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  pointer-events: none;
  z-index: 20;
}

#game-hud * {
  pointer-events: auto;
}

.hud-speedometer {
  background: rgba(10, 14, 23, 0.85);
  border: 1px solid rgba(0, 229, 255, 0.3);
  box-shadow: var(--shadow-card);
  border-radius: var(--radius-md);
  padding: 16px 24px;
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.speed-val {
  font-size: 3rem;
  font-weight: 900;
  color: var(--accent-cyan);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.speed-unit {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-secondary);
}

.hud-center-card {
  background: rgba(10, 14, 23, 0.85);
  border: 1px solid rgba(0, 229, 255, 0.3);
  border-radius: var(--radius-md);
  padding: 14px 24px;
  text-align: center;
}

.next-stop-title {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.next-stop-name {
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
}

.hud-controls-info {
  background: rgba(10, 14, 23, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.hud-controls-info kbd {
  background: rgba(255, 255, 255, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--accent-cyan);
  font-weight: 700;
}

/* ==========================================================
   TOAST ÉS ÉRTESÍTÉSEK
   ========================================================== */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 0.9rem;
  box-shadow: var(--shadow-card);
  animation: slideInRight 0.3s ease;
}

@keyframes slideInRight {
  from { transform: translateX(50px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}