* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #0f1720;
  color: white;
  padding: 20px;
}

h1 {
  margin-top: 0;
  font-size: 40px;
}

.topbar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 15px;
  margin-bottom: 20px;
}

.card {
  background: linear-gradient(135deg, #182433 0%, #0f1720 100%);
  border-radius: 16px;
  padding: 18px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
  border: 1px solid rgba(255,255,255,0.05);
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.resource-topbar-card {
  will-change: auto;
  transform: none !important;
  transition: border-color 0.15s ease;
}

.mission-card {
  padding: 10px;
  transition: border-color 0.15s ease;
  border: 1px solid transparent;
  min-height: 0;
}

#missionsContainer {
  margin-bottom: 12px;
  gap: 10px;
  display: flex;
  flex-direction: column;
}

#missionsContainer .card {
  padding: 10px;
  border-radius: 12px;
}

#missionsContainer .mission-row {
  align-items: flex-start;
  gap: 6px;
  display: flex;
  flex-direction: column;
}

#missionsContainer button {
  min-width: 82px;
  padding: 7px 9px;
  font-size: 12px;
  width: 100%;
}

@keyframes fadeInOut {
  0% { opacity: 1; }
  70% { opacity: 1; }
  100% { opacity: 0; }
}

@keyframes slideIn {
  from {
    transform: translateX(400px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideOut {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(400px);
    opacity: 0;
  }
}

@keyframes shimmer {
  0% { background-position: -1000px 0; }
  100% { background-position: 1000px 0; }
}

@keyframes floatUp {
  0% {
    opacity: 1;
    transform: translate(-50%, -50%);
  }
  100% {
    opacity: 0;
    transform: translate(-50%, -150px);
  }
}

/* Desktop: button next to content */
@media (min-width: 768px) {
  #missionsContainer .mission-row {
    flex-direction: row;
    align-items: flex-start;
  }

  #missionsContainer button {
    width: auto;
    min-width: 92px;
    flex-shrink: 0;
  }
}

.mission-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.mission-track {
  background: #0f172a;
  border: 1px solid #334155;
  border-radius: 6px;
  overflow: hidden;
  height: 6px;
  margin-top: 6px;
}

.mission-fill {
  height: 6px;
  transition: width 0.25s ease;
  background: #3b82f6;
}

.mission-fill.done {
  background: #22c55e;
}

.building {
  transition: border-color 0.15s ease;
}

button:active {
  filter: brightness(0.95);
}

.resource {
  font-size: 32px;
  font-weight: bold;
  margin-top: 5px;
}

.sub {
  opacity: 0.75;
  font-size: 14px;
}

.section-title {
  margin-top: 35px;
  margin-bottom: 15px;
  font-size: 26px;
}

.tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  border-bottom: 2px solid #243447;
  flex-wrap: wrap;
}

.tab {
  background: transparent;
  border: none;
  color: #8896a8;
  padding: 12px 24px;
  cursor: pointer;
  font-size: 16px;
  border-bottom: 3px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
  min-width: auto;
  font-weight: 500;
  box-shadow: none;
}

.tab.has-notification::after {
  content: ' •';
  color: #4ade80;
  font-weight: bold;
}

.tab.active {
  color: white;
  border-bottom-color: #2f7cf6;
  background: rgba(47, 124, 246, 0.1);
  font-weight: bold;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.building {
  background: linear-gradient(135deg, #182433 0%, #0f1720 100%);
  border-radius: 14px;
  padding: 18px;
  margin-bottom: 15px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.3);
  border: 1px solid rgba(255,255,255,0.05);
  transition: border-color 0.15s ease;
}

.building h3 {
  margin: 0 0 8px 0;
}

button {
  border: none;
  background: linear-gradient(135deg, #2f7cf6 0%, #1e5fb8 100%);
  color: white;
  padding: 12px 18px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 15px;
  min-width: 130px;
  transition: filter 0.15s ease, background-color 0.15s ease;
  font-weight: 500;
  box-shadow: 0 4px 15px rgba(47, 124, 246, 0.3);
}

button:disabled {
  background: #3a3a3a;
  cursor: not-allowed;
  opacity: 0.5;
  box-shadow: none;
}

.upgrade {
  background: linear-gradient(135deg, #243447 0%, #1a2938 100%);
  border-left: 5px solid #2f7cf6;
  padding: 20px;
  border-radius: 12px;
  margin-bottom: 15px;
  min-height: 120px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  transition: border-color 0.15s ease;
}

.upgrade h3 {
  font-size: 20px;
  margin-bottom: 10px;
}

.upgrade > div {
  margin-bottom: 8px;
  line-height: 1.6;
}

/* Kompakter Upgrade-Reiter */
#tab-upgrades .upgrade {
  padding: 12px 14px;
  margin-bottom: 10px;
  min-height: 0;
}

#tab-upgrades .upgrade h3 {
  font-size: 17px;
  margin: 0 0 6px 0;
}

#tab-upgrades .upgrade > div {
  margin-bottom: 4px;
  line-height: 1.35;
}

#tab-upgrades #clickUpgradesContainer .upgrade,
#tab-upgrades #buildingUpgrades .upgrade {
  padding: 10px 12px;
  margin-bottom: 8px;
  min-height: 0;
  border-left-width: 4px;
}

#tab-upgrades button {
  padding: 8px 12px;
  min-width: 100px;
  font-size: 13px;
}

.footer-info {
  margin-top: 30px;
  opacity: 0.7;
  font-size: 13px;
}

.offline-box {
  background: #123524;
  border: 1px solid #22c55e;
  border-radius: 8px;
  color: #d1fae5;
  margin-bottom: 18px;
  padding: 14px;
}

.chain-section {
  margin-bottom: 22px;
}

.chain-header {
  align-items: center;
  background: linear-gradient(135deg, #182433 0%, #111827 100%);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 10px;
  display: flex;
  justify-content: space-between;
  margin-bottom: 10px;
  padding: 14px 16px;
}

.chain-header h3 {
  margin: 0 0 4px 0;
}

.resource-row {
  align-items: center;
  border-top: 1px solid rgba(255,255,255,0.06);
  display: grid;
  gap: 8px;
  grid-template-columns: 1fr auto 1.5fr;
  padding: 8px 0;
}

/* Mobile Optimierung */
@media (max-width: 768px) {
  body {
    padding: 15px;
  }

  h1 {
    font-size: 28px;
    text-align: center;
  }

  .topbar {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 10px;
  }

  .card {
    padding: 12px;
  }

  #missionsContainer {
    gap: 8px;
  }

  #missionsContainer .card,
  #missionsContainer .mission-card {
    padding: 8px;
    border-radius: 10px;
  }

  #missionsContainer button {
    min-width: 76px;
    padding: 6px 8px;
    font-size: 11px;
  }

  .resource {
    font-size: 24px;
  }

  .sub {
    font-size: 12px;
  }

  .section-title {
    font-size: 20px;
    margin-top: 25px;
    margin-bottom: 12px;
  }

  .tabs {
    gap: 6px;
  }

  .tab {
    padding: 10px 12px;
    font-size: 14px;
  }

  .building {
    flex-direction: column;
    align-items: flex-start;
    padding: 15px;
    gap: 12px;
  }

  .building h3 {
    font-size: 18px;
  }

  button {
    width: 100%;
    min-width: unset;
    padding: 14px 18px;
    font-size: 16px;
    border-radius: 12px;
    touch-action: manipulation;
  }

  .buy-buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    width: 100%;
  }

  .buy-buttons button {
    min-width: unset;
    padding: 12px 8px;
    font-size: 14px;
  }

  .upgrade {
    padding: 12px;
  }

  #tab-upgrades .upgrade {
    padding: 10px 10px;
    margin-bottom: 8px;
  }

  #tab-upgrades .upgrade h3 {
    font-size: 15px;
    margin-bottom: 4px;
  }

  #tab-upgrades .upgrade > div {
    margin-bottom: 3px;
    line-height: 1.25;
  }

  #tab-upgrades #clickUpgradesContainer .upgrade,
  #tab-upgrades #buildingUpgrades .upgrade {
    padding: 8px 9px;
    margin-bottom: 6px;
  }

  #tab-upgrades button {
    padding: 7px 10px;
    min-width: 84px;
    font-size: 12px;
  }

  .offline-box {
    padding: 12px;
    font-size: 14px;
  }

  .resource-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .topbar {
    grid-template-columns: 1fr 1fr;
  }

  .resource {
    font-size: 20px;
  }

  h1 {
    font-size: 24px;
  }
}

.buy-controls {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-end;
}

.buy-buttons {
  display: flex;
  gap: 8px;
}

.buy-buttons button {
  min-width: 60px;
  padding: 8px 12px;
  font-size: 13px;
}

.buy-buttons button.active {
  background: linear-gradient(135deg, #1e5fb8 0%, #0f3a7d 100%);
  font-weight: bold;
  border: 1px solid rgba(47, 124, 246, 0.5);
}

.buy-buttons button:disabled {
  background: #3a3a3a;
  cursor: not-allowed;
  opacity: 0.5;
  box-shadow: none;
}