:root {
  --bg-primary: #0b0f19;
  --bg-surface: #141b2d;
  --bg-surface-elevated: #1e293b;
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --border-color: #334155;
  --accent-cyan: #06b6d4;
  --accent-cyan-hover: #0891b2;
  --accent-blue: #3b82f6;
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.15);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.15);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.15);
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-family);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-header {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 1.5rem;
}

.header-container {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-shield {
  font-size: 2rem;
}

.brand h1 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.tagline {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.score-pill {
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  padding: 0.4rem 0.85rem;
  border-radius: 9999px;
  font-size: 0.9rem;
}

.score-pill strong {
  color: var(--accent-cyan);
}

.main-container {
  max-width: 1000px;
  width: 100%;
  margin: 1.5rem auto;
  padding: 0 1rem;
  flex: 1;
}

.view-panel {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
}

.section-desc {
  color: var(--text-muted);
  margin-top: 0.25rem;
  margin-bottom: 1.5rem;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.25rem;
}

.mission-card {
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.mission-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-cyan);
}

.card-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.card-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  line-height: 1.4;
}

.card-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.25rem;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  border: none;
  transition: background-color 0.15s ease;
}

.btn-primary {
  background-color: var(--accent-cyan);
  color: #000;
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--accent-cyan-hover);
}

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

.btn-secondary:hover:not(:disabled) {
  background-color: var(--bg-surface-elevated);
  color: var(--text-main);
}

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

.mission-header-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
}

.badge {
  display: inline-block;
  font-size: 0.75rem;
  text-transform: uppercase;
  background-color: var(--bg-surface-elevated);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  color: var(--accent-cyan);
  margin-bottom: 0.35rem;
}

.scene-meta {
  margin-bottom: 1.25rem;
}

.scene-body-text {
  font-size: 1.05rem;
  color: var(--text-main);
  line-height: 1.5;
  margin-top: 0.5rem;
}

.asset-viewer {
  background-color: #030712;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

.evidence-img {
  max-width: 100%;
  max-height: 380px;
  object-fit: contain;
  border-radius: 4px;
}

.interaction-block {
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.interaction-prompt {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

/* Hotspots selection */
.hotspot-options-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.hotspot-btn {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.6rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
}

.hotspot-btn.selected {
  border-color: var(--accent-cyan);
  background-color: rgba(6, 182, 212, 0.15);
  color: #fff;
}

/* Radio options */
.radio-options-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.radio-option-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 0.85rem 1rem;
  border-radius: 6px;
  cursor: pointer;
}

.radio-option-label:hover {
  border-color: var(--accent-cyan);
}

.radio-option-label input[type="radio"] {
  accent-color: var(--accent-cyan);
  width: 1.1rem;
  height: 1.1rem;
}

/* Drag and Drop Classification */
.classification-layout {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 1rem;
}

.classification-cards {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.dnd-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1rem;
}

.dnd-card-title {
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}

.dnd-zone-select {
  display: flex;
  gap: 0.5rem;
}

.zone-choice-btn {
  padding: 0.4rem 0.8rem;
  font-size: 0.85rem;
  border-radius: 4px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-surface-elevated);
  color: var(--text-muted);
  cursor: pointer;
}

.zone-choice-btn.active {
  border-color: var(--accent-cyan);
  background-color: rgba(6, 182, 212, 0.2);
  color: #fff;
  font-weight: 600;
}

/* Feedback banners */
.feedback-banner {
  padding: 1rem;
  border-radius: 6px;
  margin-top: 1rem;
  font-size: 0.95rem;
  line-height: 1.4;
}

.feedback-banner.correct {
  background-color: var(--success-bg);
  border: 1px solid var(--success);
  color: #a7f3d0;
}

.feedback-banner.partial {
  background-color: var(--warning-bg);
  border: 1px solid var(--warning);
  color: #fde68a;
}

.feedback-banner.incorrect {
  background-color: var(--danger-bg);
  border: 1px solid var(--danger);
  color: #fecaca;
}

/* Completion View */
.completion-panel {
  text-align: center;
  max-width: 650px;
  margin: 0 auto;
}

.completion-icon {
  font-size: 3.5rem;
  margin-bottom: 0.5rem;
}

.score-summary-box {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin: 1.5rem 0;
}

.score-metric {
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  padding: 1rem 1.5rem;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
}

.score-metric.highlight {
  border-color: var(--accent-cyan);
}

.metric-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.metric-value {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-top: 0.25rem;
}

.objectives-box {
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem;
  text-align: left;
  margin-bottom: 1.5rem;
}

.objectives-box h4 {
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

.objectives-box ul {
  padding-left: 1.25rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.app-footer {
  text-align: center;
  padding: 1.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
}

/* ── AEG-399 additions ─────────────────────────────────────────── */

/* Header user area */
.header-user {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.header-name {
  font-size: 0.9rem;
  color: var(--text-main);
}
.header-xp {
  font-size: 0.8rem;
  color: var(--accent-cyan);
  font-weight: 600;
}
.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border-color);
}
.btn-ghost:hover {
  color: var(--text-main);
  border-color: var(--text-muted);
}
.btn-sm {
  padding: 0.3rem 0.75rem;
  font-size: 0.8rem;
}

/* Auth panel */
.auth-panel {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 2rem 1rem;
}
.auth-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2.5rem 2rem;
  max-width: 440px;
  width: 100%;
  text-align: center;
}
.auth-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}
.auth-card h2 {
  margin-bottom: 0.5rem;
}
.auth-desc {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}
.token-form {
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-bottom: 1rem;
}
.form-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}
.form-input {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0.65rem 0.9rem;
  color: var(--text-main);
  font-family: monospace;
  font-size: 0.9rem;
  width: 100%;
}
.form-input:focus {
  outline: none;
  border-color: var(--accent-cyan);
}
.form-error {
  color: var(--danger);
  font-size: 0.85rem;
  padding: 0.4rem 0;
}
.btn-full {
  width: 100%;
}
.auth-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

/* Tab navigation */
.tab-nav {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
  overflow-x: auto;
}
.tab-btn {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  padding: 0.75rem 1.25rem;
  font-size: 0.9rem;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.15s, border-color 0.15s;
}
.tab-btn:hover {
  color: var(--text-main);
}
.tab-btn.active {
  color: var(--accent-cyan);
  border-bottom-color: var(--accent-cyan);
  font-weight: 600;
}
.tab-pane {
  animation: fadeIn 0.15s ease;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}
.tab-header {
  margin-bottom: 1.25rem;
}
.tab-header h2 {
  margin-bottom: 0.25rem;
}
.tab-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Assignment cards */
.assignment-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.card-title-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
}
.status-chip {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
  white-space: nowrap;
  flex-shrink: 0;
}
.chip-available   { background: rgba(6,182,212,.15); color: var(--accent-cyan); }
.chip-inprogress  { background: var(--warning-bg);   color: var(--warning); }
.chip-completed   { background: var(--success-bg);   color: var(--success); }
.chip-default     { background: var(--bg-surface-elevated); color: var(--text-muted); }
.card-completed {
  font-size: 0.8rem;
  color: var(--success);
  margin-top: 0.25rem;
}
.card-body {
  flex: 1;
  margin-bottom: 0.75rem;
}

/* Practice tag in gameplay header */
.mission-header-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.practice-tag {
  background: var(--warning-bg);
  color: var(--warning);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
}

/* XP/badge on completion */
.xp-award-box {
  background: rgba(6,182,212,.1);
  border: 1px solid rgba(6,182,212,.3);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
}
.xp-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.2rem 0;
}
.xp-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}
.xp-value {
  font-weight: 700;
  color: var(--accent-cyan);
  font-size: 1rem;
}
.xp-total {
  font-size: 0.9rem;
}
.badges-award-box {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
  text-align: left;
}
.badges-heading {
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}
.badge-item {
  font-size: 0.9rem;
  padding: 0.25rem 0;
}

/* Completion actions */
.completion-actions {
  display: flex;
  justify-content: center;
}

/* History list */
.history-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.history-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.9rem 1.1rem;
  gap: 1rem;
}
.history-row-left {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.history-mission {
  font-weight: 500;
  font-size: 0.95rem;
}
.history-date {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.history-row-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}
.history-score {
  font-weight: 700;
  color: var(--accent-cyan);
}
.history-xp {
  font-size: 0.8rem;
  color: var(--success);
  font-weight: 600;
}

/* Progress stats */
.progress-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}
.stat-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
  text-align: center;
}
.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 0.25rem;
}
.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .04em;
}
.xp-bar-section {
  margin-bottom: 1.5rem;
}
.xp-bar-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}
.xp-bar-track {
  background: var(--bg-surface-elevated);
  border-radius: 20px;
  height: 10px;
  overflow: hidden;
}
.xp-bar-fill {
  background: var(--accent-cyan);
  height: 100%;
  border-radius: 20px;
  transition: width 0.4s ease;
}
.badges-section {
  margin-top: 0.5rem;
}
.badges-section-title {
  font-size: 1rem;
  margin-bottom: 0.75rem;
}
.badges-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 0.75rem;
}
.badge-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
  text-align: center;
}
.badge-icon {
  font-size: 1.75rem;
  margin-bottom: 0.4rem;
}
.badge-name {
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 0.2rem;
}
.badge-date {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* Leaderboard */
.leaderboard-table-wrap {
  overflow-x: auto;
}
.leaderboard-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
}
.leaderboard-table th,
.leaderboard-table td {
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--border-color);
  text-align: left;
}
.leaderboard-table th {
  color: var(--text-muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  font-weight: 600;
}
.leaderboard-table .num-col {
  text-align: right;
}
.leaderboard-table .my-row {
  background: rgba(6,182,212,.07);
}
.rank-cell {
  color: var(--text-muted);
  font-size: 0.8rem;
  width: 2rem;
}
.level-chip {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 0.15rem 0.6rem;
  font-size: 0.75rem;
  color: var(--accent-cyan);
}

/* Misc utility */
.empty-state {
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 2rem;
  text-align: center;
}