:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --border-color: #e2e8f0;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --card-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1);
}

[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --border-color: #334155;
  --card-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.3);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, sans-serif;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  min-height: 100vh;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
}

.card {
  background: var(--bg-primary);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: var(--card-shadow);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.btn {
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  border: none;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 1rem;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

.btn-secondary:hover {
  background: var(--border-color);
}

.currency-select {
  position: relative;
  width: 100%;
}

.currency-button {
  width: 100%;
  padding: 1rem;
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: all 0.2s ease;
}

.currency-button:hover {
  border-color: var(--accent);
}

.currency-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  margin-top: 0.5rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  max-height: 300px;
  overflow-y: auto;
  z-index: 100;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  display: none;
}

.currency-dropdown.active {
  display: block;
}

.currency-option {
  padding: 0.75rem 1rem;
  cursor: pointer;
  transition: background 0.15s ease;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.currency-option:hover {
  background: var(--bg-secondary);
}

.flag-icon {
  width: 24px;
  height: 18px;
  border-radius: 2px;
  object-fit: cover;
}

.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal.active {
  display: flex;
}

.modal-content {
  background: var(--bg-primary);
  border-radius: 1rem;
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
}

.theme-toggle {
  position: fixed;
  top: 1rem;
  right: 1rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 100;
  transition: all 0.2s ease;
}

.theme-toggle:hover {
  transform: rotate(180deg);
}

.stat-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 600;
}

.badge-diamond {
  background: #e0f7fa;
  color: #004d40;
}
.badge-platinum {
  background: #f1f8e9;
  color: #33691e;
}
.badge-gold {
  background: #fff9c4;
  color: #f57c00;
}
.badge-silver {
  background: #fff3e0;
  color: #e65100;
}
.badge-bronze {
  background: #fce4ec;
  color: #c2185b;
}

input[type="number"] {
  width: 100%;
  padding: 1rem;
  border: 2px solid var(--border-color);
  border-radius: 0.75rem;
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 1.125rem;
  transition: border-color 0.2s ease;
}

input[type="number"]:focus {
  outline: none;
  border-color: var(--accent);
}

.fade-in {
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.globe-icon {
  display: inline-block;
  animation: rotate 20s linear infinite;
}

@keyframes rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0.75rem;
  }
  .card {
    padding: 1rem;
  }
  h1 {
    font-size: 1.5rem;
  }
}