* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #101426;
  color: #ffffff;
}

.page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.hero-card {
  width: 100%;
  max-width: 720px;
  background: #1b1f38;
  border-radius: 28px;
  padding: 48px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
  text-align: center;
}

.eyebrow {
  color: #8dcfff;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 700;
}

h1 {
  font-size: clamp(48px, 8vw, 86px);
  margin: 12px 0;
}

.subtitle {
  font-size: 22px;
  color: #d8e4ff;
  margin-bottom: 32px;
}

.button-row {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 14px 22px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 800;
}

.primary {
  background: #5fa0ff;
  color: #101426;
}

.secondary {
  border: 2px solid #5fa0ff;
  color: #ffffff;
  background: rgba(95, 160, 255, 0.15);
}

.btn:hover {
  transform: translateY(-2px);
  opacity: 0.9;
  cursor: pointer;
}

.form-stack {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.form-stack input {
  width: 100%;
  padding: 14px 16px;
  border-radius: 14px;
  border: 2px solid #5fa0ff;
  background: #101426;
  color: #ffffff;
  font-size: 16px;
}

.form-stack input::placeholder {
  color: #b5d5ff;
}

.divider {
  border: 0;
  border-top: 1px solid rgba(181, 213, 255, 0.25);
  margin: 32px 0;
}

.list-stack {
  display: grid;
  gap: 12px;
  text-align: left;
}

.session-link {
  display: grid;
  gap: 4px;
  padding: 16px;
  border: 1px solid rgba(141, 207, 255, 0.35);
  border-radius: 18px;
  color: #ffffff;
  text-decoration: none;
  background: rgba(255, 255, 255, 0.04);
}

.session-link span {
  color: #d8e4ff;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
  margin: 24px 0;
}

.stat-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(141, 207, 255, 0.25);
  border-radius: 18px;
  padding: 18px;
  display: grid;
  gap: 8px;
}

.stat-card span {
  color: #8dcfff;
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.08em;
  font-weight: 800;
}

.stat-card strong {
  font-size: 24px;
}

.alert {
  background: rgba(223, 105, 105, 0.18);
  border: 1px solid #df6969;
  padding: 12px 16px;
  border-radius: 14px;
  color: #ffffff;
  margin: 18px 0;
}

.step-controls {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

.decision-card {
  margin-top: 24px;
}

.choice-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.choice-card {
  border: 2px solid rgba(141, 207, 255, 0.35);
  background: rgba(255, 255, 255, 0.06);
  color: #ffffff;
  border-radius: 22px;
  padding: 22px;
  display: grid;
  gap: 10px;
  text-align: left;
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.choice-card:hover {
  transform: translateY(-3px);
  border-color: #5fa0ff;
}

.choice-card strong {
  font-size: 22px;
}

.choice-card span {
  color: #8dcfff;
  font-size: 28px;
  font-weight: 900;
}

.choice-card small {
  color: #d8e4ff;
  font-size: 14px;
  line-height: 1.4;
}

.alert.success {
  background: rgba(95, 160, 255, 0.18);
  border-color: #5fa0ff;
}

.section-block {
  margin-top: 32px;
}

.section-block:first-child {
  margin-top: 0;
}

.center {
  display: flex;
  justify-content: center;
  margin-top: 40px;
}

.list-stack {
  display: grid;
  gap: 16px;
  margin-top: 16px;
}

.event-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.event-card {
  border: 2px solid rgba(223, 105, 105, 0.45);
  background: rgba(223, 105, 105, 0.12);
  color: #ffffff;
  border-radius: 22px;
  padding: 22px;
  display: grid;
  gap: 10px;
  text-align: left;
  cursor: pointer;
}

.event-card:hover {
  transform: translateY(-3px);
  border-color: #df6969;
}

.event-card strong {
  font-size: 20px;
}

.event-card span {
  font-size: 28px;
  font-weight: 900;
  color: #ffffff;
}

.event-card small {
  color: #f5dede;
  line-height: 1.4;
}

.event-card em {
  color: #8dcfff;
  font-style: normal;
  text-transform: uppercase;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.reveal-section {
  background: rgba(95, 160, 255, 0.08);
  border: 1px solid rgba(141, 207, 255, 0.35);
  border-radius: 24px;
  padding: 24px;
}

.leaderboard {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.leaderboard-row {
  display: grid;
  grid-template-columns: 70px 1fr auto auto;
  gap: 14px;
  align-items: center;
  padding: 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(141, 207, 255, 0.25);
}

.leaderboard-row .rank {
  color: #8dcfff;
  font-weight: 900;
  font-size: 20px;
}

.leaderboard-row strong {
  font-size: 18px;
}

.leaderboard-row em {
  font-style: normal;
  color: #d8e4ff;
  font-weight: 800;
}

.status-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.status-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(141, 207, 255, 0.25);
  border-radius: 18px;
  padding: 18px;
  text-align: center;
}

.status-card h3 {
  margin: 0 0 8px;
}

.status-card strong {
  font-size: 42px;
  color: #8dcfff;
}

.status-card p {
  margin: 4px 0 0;
  color: #d8e4ff;
}

.final-card {
  background: rgba(95, 160, 255, 0.1);
  border: 1px solid rgba(141, 207, 255, 0.35);
  border-radius: 24px;
  padding: 28px;
  text-align: center;
}

.final-card h2 {
  font-size: 42px;
  margin: 10px 0;
}

.final-balance {
  font-size: 64px;
  font-weight: 900;
  margin: 12px 0;
  color: #8dcfff;
}

.reflection-box {
  margin-top: 28px;
  padding: 20px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.06);
}

.reflection-box h3 {
  margin-top: 0;
}

.alert.positive {
  background: rgba(80, 200, 120, 0.18);
  border: 1px solid #50c878;
  color: #ffffff;
}

.alert.negative {
  background: rgba(223, 105, 105, 0.18);
  border: 1px solid #df6969;
  color: #ffffff;
}

.text-positive {
  color: #50c878;
}

.text-negative {
  color: #df6969;
}

.waiting-card {
  margin-top: 24px;
  padding: 28px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(141, 207, 255, 0.25);
  text-align: center;
}

.danger {
  background: rgba(223, 105, 105, 0.18);
  border: 2px solid #df6969;
  color: #ffffff;
}

.danger:hover {
  background: rgba(223, 105, 105, 0.28);
}

button:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none !important;
}

.instructor-layout {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 24px;
  padding: 24px;
  background: #101426;
}

.instructor-sidebar {
  position: sticky;
  top: 24px;
  align-self: start;
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  background: #1b1f38;
  border: 1px solid rgba(141, 207, 255, 0.25);
  border-radius: 28px;
  padding: 24px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.25);
}

.instructor-main {
  max-width: none;
  text-align: center;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.sidebar-header h2 {
  margin: 0;
}

.sidebar-header span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  border-radius: 999px;
  background: #5fa0ff;
  color: #101426;
  font-weight: 900;
}

.sidebar-player-list {
  display: grid;
  gap: 12px;
}

.player-row {
  padding: 14px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(141, 207, 255, 0.22);
  display: grid;
  gap: 5px;
}

.player-name {
  font-size: 16px;
}

.player-balance {
  color: #8dcfff;
  font-weight: 800;
}

.player-status {
  color: #d8e4ff;
  font-size: 14px;
}

@media (max-width: 900px) {
  .instructor-layout {
    grid-template-columns: 1fr;
  }

  .instructor-sidebar {
    position: relative;
    top: auto;
    max-height: none;
  }
}