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

:root {
  --bg-dark: #0f1419;
  --bg-card: #1a1f2e;
  --bg-card-hover: #242b3d;
  --border: #2d3748;
  --text: #e2e8f0;
  --text-muted: #8892a4;
  --primary: #3182ce;
  --primary-hover: #2c5aa0;
  --success: #38a169;
  --danger: #e53e3e;
  --warning: #dd6b20;
  --gold: #f6ad55;
  --silver: #a0aec0;
  --bronze: #c77b30;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-dark);
  color: var(--text);
  min-height: 100vh;
}

/* Screens */
.screen {
  display: none;
  min-height: 100vh;
}

.screen.active {
  display: block;
}

/* Loading Screen */
#loading-screen {
  display: flex;
  align-items: center;
  justify-content: center;
}

.loading-content {
  text-align: center;
}

.logo {
  font-size: 64px;
  margin-bottom: 16px;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 24px auto;
}

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

/* Auth Screen */
.auth-container {
  max-width: 400px;
  margin: 0 auto;
  padding: 80px 24px;
  text-align: center;
}

.auth-container h1 {
  font-size: 28px;
  margin-bottom: 8px;
}

.subtitle {
  color: var(--text-muted);
  margin-bottom: 32px;
}

#login-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

#login-form input {
  padding: 14px 16px;
  font-size: 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-card);
  color: var(--text);
}

#login-form input:focus {
  outline: none;
  border-color: var(--primary);
}

.message {
  margin-top: 16px;
  padding: 12px;
  border-radius: 8px;
  display: none;
}

.message.success {
  display: block;
  background: rgba(56, 161, 105, 0.2);
  color: var(--success);
}

.message.error {
  display: block;
  background: rgba(229, 62, 62, 0.2);
  color: var(--danger);
}

/* Buttons */
.btn {
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}

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

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

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

.btn.secondary:hover {
  background: var(--bg-card-hover);
}

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

.btn.danger:hover {
  background: #c53030;
}

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

.btn-icon {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 18px;
  padding: 8px;
}

.btn-icon:hover {
  color: var(--text);
}

/* Header */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-small {
  font-size: 28px;
}

.pool-name {
  font-weight: 600;
  font-size: 18px;
}

nav {
  display: flex;
  gap: 8px;
}

.nav-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border-radius: 6px;
  transition: all 0.2s;
}

.nav-btn:hover {
  color: var(--text);
  background: var(--bg-card-hover);
}

.nav-btn.active {
  color: var(--text);
  background: var(--primary);
}

.admin-only {
  display: none;
}

.is-admin .admin-only {
  display: inline-flex;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

#user-display {
  color: var(--text-muted);
  font-size: 14px;
}

/* Main Content */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}

.page {
  display: none;
}

.page.active {
  display: block;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.page-header h2 {
  font-size: 24px;
}

/* Lock Status */
.lock-status {
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
}

.lock-status.locked {
  background: rgba(229, 62, 62, 0.2);
  color: var(--danger);
}

.lock-status.open {
  background: rgba(56, 161, 105, 0.2);
  color: var(--success);
}

/* Leaderboard */
.leaderboard-table {
  width: 100%;
  border-collapse: collapse;
}

.leaderboard-table th,
.leaderboard-table td {
  padding: 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.leaderboard-table th {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.leaderboard-table tr:hover td {
  background: var(--bg-card);
}

.rank {
  font-weight: 700;
  font-size: 18px;
  width: 48px;
}

.rank-1 { color: var(--gold); }
.rank-2 { color: var(--silver); }
.rank-3 { color: var(--bronze); }

.player-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-card-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.player-name {
  font-weight: 600;
}

.points {
  font-weight: 700;
  font-size: 20px;
  color: var(--primary);
}

.stat {
  color: var(--text-muted);
  font-size: 14px;
}

/* Bracket */
.bracket-round {
  margin-bottom: 32px;
}

.round-header {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border);
}

.round-multiplier {
  color: var(--text-muted);
  font-weight: 400;
  font-size: 14px;
  margin-left: 8px;
}

.series-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

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

.series-card.complete {
  opacity: 0.7;
}

.series-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  font-size: 13px;
  color: var(--text-muted);
}

.series-matchup {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.team-option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: 8px;
  border: 2px solid var(--border);
  cursor: pointer;
  transition: all 0.2s;
}

.team-option:hover {
  border-color: var(--primary);
}

.team-option.selected {
  border-color: var(--primary);
  background: rgba(49, 130, 206, 0.1);
}

.team-option.correct {
  border-color: var(--success);
  background: rgba(56, 161, 105, 0.1);
}

.team-option.incorrect {
  border-color: var(--danger);
  background: rgba(229, 62, 62, 0.1);
}

.team-option.disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.team-logo {
  width: 32px;
  height: 32px;
  background: var(--bg-dark);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

.team-name {
  flex: 1;
  font-weight: 500;
}

.team-record {
  color: var(--text-muted);
  font-size: 13px;
}

.games-picker {
  display: flex;
  align-items: center;
  gap: 8px;
}

.games-picker label {
  color: var(--text-muted);
  font-size: 13px;
}

.games-picker select {
  padding: 8px 12px;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 14px;
}

.games-picker select:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.series-result {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  font-size: 14px;
}

.series-result .points-earned {
  color: var(--success);
  font-weight: 600;
}

/* Picks Status */
.picks-status {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 14px;
}

.picks-status.warning {
  background: rgba(221, 107, 32, 0.2);
  color: var(--warning);
}

.picks-status.info {
  background: rgba(49, 130, 206, 0.2);
  color: var(--primary);
}

/* Profile */
.profile-form {
  max-width: 400px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  font-size: 14px;
}

.form-group input {
  width: 100%;
  padding: 12px 14px;
  font-size: 15px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-card);
  color: var(--text);
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary);
}

.form-group input:disabled {
  opacity: 0.6;
}

/* Admin */
.admin-section {
  background: var(--bg-card);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 24px;
  border: 1px solid var(--border);
}

.admin-section h3 {
  margin-bottom: 12px;
  font-size: 16px;
}

.admin-controls {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.help-text {
  color: var(--text-muted);
  font-size: 13px;
  margin-bottom: 12px;
}

.invite-result {
  margin-top: 12px;
  padding: 12px;
  background: var(--bg-dark);
  border-radius: 6px;
  font-family: monospace;
  font-size: 13px;
  word-break: break-all;
  display: none;
}

.invite-result.show {
  display: block;
}

#setup-result {
  margin-top: 12px;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 13px;
}

#setup-result.success {
  background: rgba(56, 161, 105, 0.2);
  color: var(--success);
}

/* Series Admin */
.series-admin-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.series-admin-item:last-child {
  border-bottom: none;
}

.series-admin-matchup {
  min-width: 200px;
  font-weight: 500;
}

.series-admin-controls {
  display: flex;
  gap: 8px;
  align-items: center;
}

.series-admin-controls select,
.series-admin-controls input {
  padding: 8px 10px;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 13px;
}

.series-admin-controls input {
  width: 50px;
}

/* Users Admin */
.user-admin-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.user-admin-item:last-child {
  border-bottom: none;
}

.user-admin-info {
  flex: 1;
}

.user-admin-email {
  font-weight: 500;
}

.user-admin-meta {
  font-size: 13px;
  color: var(--text-muted);
}

/* Mobile */
@media (max-width: 768px) {
  header {
    flex-direction: column;
    gap: 12px;
    padding: 12px 16px;
  }
  
  nav {
    order: 3;
    width: 100%;
    overflow-x: auto;
    padding-bottom: 4px;
  }
  
  .nav-btn {
    flex-shrink: 0;
  }
  
  main {
    padding: 16px;
  }
  
  .page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  
  .leaderboard-table {
    font-size: 14px;
  }
  
  .leaderboard-table th,
  .leaderboard-table td {
    padding: 12px 8px;
  }
  
  .series-grid {
    grid-template-columns: 1fr;
  }
}