:root {
  --bg-color: #f8f9fa;
  --text-color: #212529;
  --card-bg: #ffffff;
  --primary-color: #6c5ce7;
  --accent-color: #a29bfe;
  --field-bg: #e9ecef;
  --field-active: #6c5ce7;
  --field-hover: #dee2e6;
  --border-radius: 12px;
  --transition: all 0.3s ease;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
  --bg-color: #1a1a1a;
  --text-color: #f8f9fa;
  --card-bg: #2d2d2d;
  --primary-color: #a29bfe;
  --accent-color: #6c5ce7;
  --field-bg: #3d3d3d;
  --field-active: #a29bfe;
  --field-hover: #4d4d4d;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: var(--transition);
  line-height: 1.6;
}

header {
  padding: 2rem;
  text-align: center;
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

h1 {
  font-weight: 800;
  letter-spacing: -1px;
}

.controls {
  display: flex;
  gap: 1rem;
}

button {
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  transition: var(--transition);
  background-color: var(--primary-color);
  color: white;
}

button:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
}

button.secondary {
  background-color: var(--field-bg);
  color: var(--text-color);
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

.card {
  background-color: var(--card-bg);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  border-top: 5px solid var(--card-color, var(--primary-color));
}

.reward-info {
  background: var(--field-bg);
  padding: 0.75rem;
  border-radius: 8px;
  font-size: 0.9rem;
  border-left: 4px solid var(--card-color, var(--primary-color));
}

.reward-info strong {
  display: block;
  color: var(--card-color, var(--primary-color));
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.archive-btn {
  width: 100%;
  background-color: #00b894;
  margin-top: 0.5rem;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(0, 184, 148, 0.4); }
  70% { transform: scale(1.02); box-shadow: 0 0 0 10px rgba(0, 184, 148, 0); }
  100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(0, 184, 148, 0); }
}

.card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.punch-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.5rem;
}

.punch-field {
  aspect-ratio: 1;
  background-color: var(--field-bg);
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.punch-field:hover {
  background-color: var(--field-hover);
}

.punch-field.active {
  background-color: var(--field-active);
  transform: scale(0.9);
  animation: pop 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes pop {
  0% { transform: scale(1); }
  50% { transform: scale(1.2); }
  100% { transform: scale(0.9); }
}

.progress-container {
  height: 8px;
  background-color: var(--field-bg);
  border-radius: 4px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background-color: var(--primary-color);
  width: 0%;
  transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  color: #666;
}

/* Admin Panel Styles */
.admin-login {
  max-width: 400px;
  margin: 4rem auto;
  padding: 2rem;
  background: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

input {
  width: 100%;
  padding: 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--field-bg);
  background: var(--bg-color);
  color: var(--text-color);
}

.admin-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}

.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.modal-content {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: var(--border-radius);
  width: 90%;
  max-width: 500px;
}

/* Dark mode toggle icon */
.theme-toggle {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-color);
  padding: 0.5rem;
}