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

:root {
  --bg: #0a0a0f;
  --bg-card: #15151f;
  --bg-input: #1a1a2e;
  --border: #2a2a3e;
  --text: #e0e0e8;
  --text-dim: #8888a0;
  --accent: #8b5cf6;
  --accent-hover: #7c3aed;
  --green: #22c55e;
  --red: #ef4444;
  --yellow: #eab308;
  --pi-gold: #f7931a;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

#app {
  max-width: 480px;
  margin: 0 auto;
  padding: 16px;
  min-height: 100vh;
}

.hidden {
  display: none !important;
}

/* Header */
.header {
  text-align: center;
  margin-bottom: 24px;
}

.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header h1 {
  font-size: 1.4rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--pi-gold), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin-top: 4px;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.btn-icon {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 1rem;
  padding: 4px;
}

/* Auth Screen */
.auth-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px 24px;
  text-align: center;
  margin-top: 60px;
}

.auth-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.auth-card h2 {
  font-size: 1.4rem;
  margin-bottom: 12px;
}

.auth-card p {
  color: var(--text-dim);
  font-size: 0.9rem;
  line-height: 1.5;
  margin-bottom: 24px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border: none;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--accent);
  color: white;
  width: 100%;
}

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

.btn-lg {
  padding: 14px 28px;
  font-size: 1rem;
}

.btn-sm {
  padding: 8px 14px;
  font-size: 0.8rem;
}

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

.btn-green:hover {
  opacity: 0.9;
}

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

.btn-red:hover {
  opacity: 0.9;
}

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

/* Stats Dashboard */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-bottom: 20px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 8px;
  text-align: center;
}

.stat-value {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--pi-gold);
}

.stat-label {
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-top: 2px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Create Form */
.create-section {
  margin-bottom: 20px;
}

.create-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}

.create-form input[type="text"] {
  width: 100%;
  padding: 12px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.95rem;
  margin-bottom: 12px;
  outline: none;
}

.create-form input[type="text"]:focus {
  border-color: var(--accent);
}

.wager-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 12px;
}

.wager-input-group label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.wager-input-group input {
  width: 100%;
  padding: 10px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.9rem;
  outline: none;
}

.wager-input-group input:focus {
  border-color: var(--accent);
}

/* Filters */
.filters {
  display: flex;
  gap: 6px;
  margin-bottom: 16px;
}

.filter-btn {
  flex: 1;
  padding: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-dim);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.filter-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

/* Task List */
.task-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.task-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  transition: all 0.2s;
}

.task-card:hover {
  border-color: var(--accent);
}

.task-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
}

.task-text {
  flex: 1;
  font-size: 0.95rem;
  line-height: 1.4;
}

.task-text.completed {
  text-decoration: line-through;
  color: var(--text-dim);
}

.task-badge {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 3px 8px;
  border-radius: 6px;
  white-space: nowrap;
}

.badge-pending {
  background: rgba(139, 92, 246, 0.15);
  color: var(--accent);
}

.badge-won {
  background: rgba(34, 197, 94, 0.15);
  color: var(--green);
}

.badge-lost {
  background: rgba(239, 68, 68, 0.15);
  color: var(--red);
}

.badge-wager {
  background: rgba(247, 147, 26, 0.15);
  color: var(--pi-gold);
}

.task-meta {
  display: flex;
  gap: 8px;
  margin-top: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.task-meta-item {
  font-size: 0.75rem;
  color: var(--text-dim);
}

.task-meta-item.countdown {
  color: var(--yellow);
}

.task-meta-item.overdue {
  color: var(--red);
}

.task-actions {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

/* Loading */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Responsive */
@media (max-width: 400px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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