@import url('https://fonts.googleapis.com/css2?family=Boogaloo&family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── DESIGN TOKENS — Industrial Futuristic Dark ─────────────────────── */
:root {
  --bg:            #060C15;
  --surface:       #0B1826;
  --card:          #0F2035;
  --card-hover:    #162A45;
  --border:        #1A3555;
  --border-bright: #244D78;
  --accent:        #00C2FF;
  --accent-dim:    rgba(0,194,255,0.10);
  --accent-glow:   rgba(0,194,255,0.28);
  --green:         #00E676;
  --green-dim:     rgba(0,230,118,0.10);
  --amber:         #FF9500;
  --amber-dim:     rgba(255,149,0,0.10);
  --danger:        #FF4040;
  --danger-dim:    rgba(255,64,64,0.10);
  --purple:        #B44FFF;
  --purple-dim:    rgba(180,79,255,0.10);
  --success:       #00E676;
  --success-dim:   rgba(0,230,118,0.10);
  --warning:       #FF9500;
  --warning-dim:   rgba(255,149,0,0.10);
  --text:          #C5DFFF;
  --text-muted:    #5B7FA0;
  --text-dim:      #1E3A5A;
  --font-display:  'Boogaloo', cursive;
  --font-body:     'DM Sans', sans-serif;
  --font-mono:     'JetBrains Mono', monospace;
  --radius:        18px;
  --radius-sm:     12px;
  --radius-pill:   999px;
  --shadow:        0 4px 20px rgba(0,0,0,0.7), 0 1px 4px rgba(0,0,0,0.5);
  --shadow-sm:     0 2px 10px rgba(0,0,0,0.5);
  --shadow-glow:   0 0 24px rgba(0,194,255,0.3);
  --shadow-green:  0 0 24px rgba(0,230,118,0.3);
  --transition:    180ms ease;
  --zone-bg:       linear-gradient(135deg, #0F2035, #152840);
  --xp-card-bg:    linear-gradient(135deg, #0B1E35 0%, #112230 100%);
  --sidebar-bg:    linear-gradient(180deg, #0A1826 0%, #060C15 100%);
  --pipeline-dash: rgba(0,194,255,0.25);
}

/* ── RESET ──────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { height: 100%; height: 100dvh; font-size: 16px; }
body {
  height: 100%; height: 100dvh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input[type=range] { cursor: pointer; }

/* ── APP WRAPPER ────────────────────────────────────────────────────── */
#app {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#main-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  max-width: 540px;
  width: 100%;
  margin: 0 auto;
}

#screens-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

.sidebar { display: none; }

/* ── INSTALL BANNER ─────────────────────────────────────────────────── */
#install-banner {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: var(--accent-dim);
  border-bottom: 1px solid rgba(0,194,255,0.2);
  font-size: 0.82rem;
  color: var(--accent);
  flex-shrink: 0;
}
#install-banner.visible { display: flex; }
#btn-install {
  margin-left: auto;
  background: var(--accent);
  color: #000;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 700;
}
#btn-dismiss { color: var(--text-muted); font-size: 0.9rem; padding: 2px 6px; }

/* ── SCREENS ────────────────────────────────────────────────────────── */
.screen {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  display: none;
  flex-direction: column;
  padding: 0 16px 80px;
}
.screen.active { display: flex; }
.screen-inner {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 0 16px;
}
.screen::-webkit-scrollbar { width: 4px; }
.screen::-webkit-scrollbar-track { background: transparent; }
.screen::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

/* ── BOTTOM NAV ─────────────────────────────────────────────────────── */
.nav-bottom {
  position: relative;
  flex-shrink: 0;
  height: 64px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: stretch;
  z-index: 100;
}
.nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  color: var(--text-muted);
  font-size: 0.68rem;
  font-weight: 500;
  transition: color var(--transition);
  padding-bottom: env(safe-area-inset-bottom, 0);
}
.nav-item.active { color: var(--accent); }
.nav-item svg { width: 22px; height: 22px; }

/* ── STATUS LIGHT (pulsing indicator) ──────────────────────────────── */
.status-light {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}
.status-light.online  { background: var(--green);  box-shadow: 0 0 8px var(--green);  animation: lightPulse 2s ease infinite; }
.status-light.offline { background: var(--danger);  box-shadow: 0 0 8px var(--danger); }
.status-light.warn    { background: var(--amber);  box-shadow: 0 0 8px var(--amber);  animation: lightPulse 1s ease infinite; }
@keyframes lightPulse {
  0%,100% { opacity: 1; transform: scale(1); }
  50%     { opacity: 0.5; transform: scale(0.85); }
}

/* ── SHARED BUTTONS ─────────────────────────────────────────────────── */
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #0090CC);
  color: #000;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  width: 100%;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 20px rgba(0,194,255,0.3);
  letter-spacing: 0.3px;
}
.btn-primary:active { transform: scale(0.97); }
.btn-primary:disabled { opacity: 0.35; pointer-events: none; }

.btn-success {
  background: linear-gradient(135deg, var(--green), #00B85A);
  color: #000;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  width: 100%;
  box-shadow: 0 4px 20px rgba(0,230,118,0.3);
}
.btn-success:active { transform: scale(0.97); }

.btn-outline {
  border: 2px solid var(--border-bright);
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 0.92rem;
  padding: 11px 22px;
  border-radius: var(--radius-pill);
  transition: border-color var(--transition), color var(--transition);
}
.btn-outline:hover, .btn-outline:active { border-color: var(--accent); color: var(--accent); }

.back-btn {
  color: var(--text-muted);
  font-size: 0.88rem;
  padding: 8px 4px;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: color var(--transition);
}
.back-btn:hover, .back-btn:active { color: var(--accent); }

.section-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin: 20px 0 12px;
}

/* ── HOME SCREEN ────────────────────────────────────────────────────── */
.home-inner { padding-bottom: 16px; }

.home-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0 12px;
}
.home-brand { display: flex; align-items: center; gap: 12px; }
.home-logo { width: 42px; height: 42px; border-radius: 12px; }
.home-app-name {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--text);
  line-height: 1.1;
}
.home-app-sub { font-size: 0.75rem; color: var(--text-muted); letter-spacing: 0.5px; }
.home-streak {
  display: flex;
  align-items: center;
  gap: 5px;
  background: var(--card);
  border: 1px solid var(--border);
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--amber);
}

/* System Health Card (replaces XP card) */
.sys-health-card {
  background: var(--xp-card-bg);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius);
  padding: 14px 18px;
  margin-bottom: 4px;
  position: relative;
  overflow: hidden;
}
.sys-health-card::before {
  content: '';
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: 3px;
  background: var(--green);
  box-shadow: 0 0 12px var(--green);
}
.sys-health-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  gap: 8px;
}
.sys-metric {
  flex: 1;
  min-width: 0;
}
.sys-metric-label {
  font-size: 0.68rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 4px;
}
.sys-metric-value {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--accent);
  white-space: nowrap;
}
.sys-metric-value.green { color: var(--green); }
.sys-metric-value.amber { color: var(--amber); }
.sys-metric-value.danger { color: var(--danger); }
.sys-divider-v {
  width: 1px;
  height: 40px;
  background: var(--border);
  flex-shrink: 0;
}

/* XP bar */
.xp-card {
  background: var(--xp-card-bg);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius);
  padding: 14px 18px;
  margin-bottom: 4px;
}
.xp-level-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 8px;
}
.xp-level-label {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--accent);
}
.xp-amount { font-size: 0.82rem; color: var(--text-muted); }
.xp-bar {
  height: 8px;
  background: var(--border);
  border-radius: var(--radius-pill);
  overflow: hidden;
  margin-bottom: 4px;
}
.xp-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--green));
  border-radius: var(--radius-pill);
  transition: width 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 0 10px rgba(0,194,255,0.5);
}
.xp-next { font-size: 0.72rem; color: var(--text-dim); margin-top: 4px; text-align: right; }

/* Topic grid */
.topic-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding-bottom: 8px;
}
.topic-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 14px 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
  cursor: pointer;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
  min-height: 130px;
}
.topic-card:not(.locked):hover,
.topic-card:not(.locked):active {
  transform: translateY(-2px);
  border-color: var(--tc, var(--accent));
  box-shadow: 0 6px 24px rgba(0,0,0,0.6), 0 0 0 1px var(--tc, var(--accent)), 0 0 20px rgba(0,194,255,0.1);
}
.topic-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--tc, var(--accent));
  box-shadow: 0 0 10px var(--tc, var(--accent));
  opacity: 0;
  transition: opacity var(--transition);
}
.topic-card:not(.locked):hover::before { opacity: 1; }
.topic-card.locked {
  opacity: 0.35;
  cursor: default;
  border-style: dashed;
}
.topic-card-emoji {
  font-size: 2.2rem;
  line-height: 1;
  filter: drop-shadow(0 0 10px rgba(0,194,255,0.4));
}
.topic-card.locked .topic-card-emoji { filter: none; }
.topic-card-name {
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--text);
  line-height: 1.2;
}
.topic-card.locked .topic-card-name { color: var(--text-muted); }
.topic-card-stars { font-size: 0.85rem; letter-spacing: 1px; }
.topic-card-bar {
  width: 80%;
  height: 4px;
  background: var(--border);
  border-radius: var(--radius-pill);
  overflow: hidden;
}
.topic-card-bar-fill {
  height: 100%;
  background: var(--tc, var(--accent));
  border-radius: var(--radius-pill);
  transition: width 0.6s ease;
  box-shadow: 0 0 8px var(--tc, var(--accent));
}
.topic-card-lock-label { font-size: 0.7rem; color: var(--text-dim); }

/* ── HUB SCREEN ─────────────────────────────────────────────────────── */
.hub-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0 8px;
}
.hub-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px 16px 20px;
  text-align: center;
  background: linear-gradient(180deg, var(--card) 0%, transparent 100%);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}
.hub-hero::before {
  content: '';
  position: absolute;
  top: -40px; left: 50%; transform: translateX(-50%);
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(0,194,255,0.06) 0%, transparent 70%);
}
.hub-emoji {
  font-size: 3.5rem;
  line-height: 1;
  margin-bottom: 12px;
  filter: drop-shadow(0 0 20px rgba(0,194,255,0.6));
}
.hub-title {
  font-family: var(--font-display);
  font-size: 1.7rem;
  color: var(--text);
  margin-bottom: 6px;
}
.hub-metaphor {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-style: italic;
  max-width: 280px;
  line-height: 1.4;
}
.hub-modes { display: flex; flex-direction: column; gap: 10px; }
.mode-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  text-align: left;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  width: 100%;
}
.mode-card:hover, .mode-card:active {
  border-color: var(--accent);
  transform: translateX(3px);
  box-shadow: 0 0 15px rgba(0,194,255,0.1);
}
.mode-card.done { border-color: var(--green); }
.mode-icon { font-size: 1.7rem; flex-shrink: 0; }
.mode-label { font-family: var(--font-display); font-size: 1.05rem; color: var(--text); }
.mode-detail { font-size: 0.8rem; color: var(--text-muted); margin-top: 2px; }
.mode-xp {
  margin-left: auto;
  background: var(--accent-dim);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  flex-shrink: 0;
  border: 1px solid rgba(0,194,255,0.2);
}
.mode-card.done .mode-xp { background: var(--green-dim); color: var(--green); border-color: rgba(0,230,118,0.2); }

/* ── STUDY SCREEN ───────────────────────────────────────────────────── */
.study-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0 12px;
  flex-shrink: 0;
}
.study-dots { display: flex; gap: 6px; align-items: center; }
.study-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--border);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}
.study-dot.active {
  background: var(--accent);
  transform: scale(1.3);
  box-shadow: 0 0 8px var(--accent);
}
.study-dot.done { background: var(--green); box-shadow: 0 0 5px var(--green); }
.study-badge {
  font-size: 0.78rem;
  color: var(--text-muted);
  background: var(--card);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
}

.study-page-content { flex: 1; animation: fadeSlide 0.3s ease; }
@keyframes fadeSlide {
  from { opacity: 0; transform: translateX(18px); }
  to   { opacity: 1; transform: translateX(0); }
}
.study-page-content.slide-back { animation: fadeSlideBack 0.3s ease; }
@keyframes fadeSlideBack {
  from { opacity: 0; transform: translateX(-18px); }
  to   { opacity: 1; transform: translateX(0); }
}

.study-nav { display: flex; gap: 10px; padding: 16px 0 8px; flex-shrink: 0; }
.study-nav > * { flex: 1; }

/* Study content components */
.study-heading {
  font-family: var(--font-display);
  font-size: 1.55rem;
  color: var(--text);
  line-height: 1.2;
  margin: 18px 0 14px;
}
.study-sub {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--accent);
  margin: 18px 0 8px;
}
.study-p {
  font-size: 0.95rem;
  color: var(--text);
  line-height: 1.65;
  margin-bottom: 12px;
}
.study-fact {
  background: var(--accent-dim);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 12px 16px;
  margin: 14px 0;
  font-size: 0.9rem;
  color: var(--text);
  line-height: 1.5;
  box-shadow: inset 0 0 20px rgba(0,194,255,0.03);
}
.study-fact strong { color: var(--accent); }
.study-warn {
  background: var(--amber-dim);
  border-left: 3px solid var(--amber);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 12px 16px;
  margin: 14px 0;
  font-size: 0.9rem;
  color: var(--text);
  line-height: 1.5;
}
.study-success {
  background: var(--green-dim);
  border-left: 3px solid var(--green);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 12px 16px;
  margin: 14px 0;
  font-size: 0.9rem;
  color: var(--text);
  line-height: 1.5;
}

.concept-grid { display: flex; flex-direction: column; gap: 10px; margin: 12px 0; }
.concept-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  display: flex;
  gap: 12px;
  align-items: flex-start;
  transition: border-color var(--transition);
}
.concept-card:hover { border-color: var(--border-bright); }
.concept-icon { font-size: 1.5rem; flex-shrink: 0; }
.concept-title {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--text);
  margin-bottom: 3px;
}
.concept-desc { font-size: 0.86rem; color: var(--text-muted); line-height: 1.5; }

.algo-grid { display: flex; flex-direction: column; gap: 10px; margin: 12px 0; }
.algo-card {
  background: var(--card);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  border: 1px solid var(--border);
}
.algo-name { font-family: var(--font-display); font-size: 1rem; margin-bottom: 4px; }
.algo-desc { font-size: 0.85rem; color: var(--text-muted); }
.algo-example {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  background: rgba(0,194,255,0.06);
  padding: 6px 10px;
  border-radius: 6px;
  border: 1px solid rgba(0,194,255,0.12);
}

.realworld-grid { display: flex; flex-direction: column; gap: 8px; margin: 12px 0; }
.realworld-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.realworld-name { font-family: var(--font-display); font-size: 0.95rem; }
.realworld-tag {
  font-size: 0.72rem;
  background: var(--accent-dim);
  color: var(--accent);
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(0,194,255,0.2);
  white-space: nowrap;
}

/* Route table display (for study mode) */
.route-table-wrap {
  background: var(--card);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin: 12px 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
}
.route-table-head {
  display: flex;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 8px 14px;
}
.route-table-head span {
  flex: 1;
  color: var(--text-muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.8px;
}
.route-table-row {
  display: flex;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  align-items: center;
  transition: background var(--transition);
}
.route-table-row:last-child { border-bottom: none; }
.route-table-row:hover { background: var(--card-hover); }
.route-dest { flex: 1; color: var(--text); }
.route-target { flex: 1; }
.route-target.igw { color: var(--accent); }
.route-target.nat { color: var(--amber); }
.route-target.local { color: var(--green); }

/* Architecture diagram */
.arch-diagram {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin: 14px 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.8;
  color: var(--text-muted);
  overflow-x: auto;
}
.arch-diagram .h { color: var(--accent); font-weight: 700; }
.arch-diagram .g { color: var(--green); }
.arch-diagram .a { color: var(--amber); }

/* VPC flow animation */
.vpc-flow {
  background: var(--zone-bg);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius);
  padding: 20px 16px;
  margin: 14px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.flow-node {
  background: var(--card);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-sm);
  padding: 8px 18px;
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--text);
  text-align: center;
  width: 100%;
  max-width: 280px;
}
.flow-node.internet { border-color: var(--accent); color: var(--accent); box-shadow: 0 0 10px rgba(0,194,255,0.15); }
.flow-node.igw      { border-color: var(--accent); color: var(--accent); }
.flow-node.nat      { border-color: var(--amber); color: var(--amber); }
.flow-node.public   { border-color: var(--green); color: var(--green); }
.flow-node.private  { border-color: var(--purple); color: var(--purple); }
.flow-arrow {
  font-size: 1.2rem;
  color: var(--text-dim);
  animation: arrowPulse 1.5s ease infinite;
}
.flow-arrow.up { color: var(--green); }
.flow-arrow.down { color: var(--accent); }
@keyframes arrowPulse {
  0%,100% { opacity: 0.4; transform: translateY(0); }
  50%     { opacity: 1; transform: translateY(-2px); }
}

/* Interactive demo */
.study-demo {
  background: var(--card);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius);
  padding: 16px;
  margin: 14px 0;
}
.demo-label {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--accent);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.demo-server-box {
  background: var(--surface);
  border-radius: var(--radius-sm);
  padding: 14px;
  text-align: center;
  border: 1px solid var(--border);
  transition: border-color 0.3s, box-shadow 0.3s;
  margin-bottom: 14px;
}
.demo-server-box.stress { border-color: var(--amber); box-shadow: 0 0 12px rgba(255,149,0,0.2); }
.demo-server-box.critical { border-color: var(--danger); box-shadow: 0 0 16px rgba(255,64,64,0.2); animation: shake 0.4s ease; }
@keyframes shake {
  0%,100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}
.demo-server-icon { font-size: 2rem; margin-bottom: 6px; }
.demo-server-name { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 10px; }
.demo-load-bar { height: 12px; background: var(--border); border-radius: var(--radius-pill); overflow: hidden; margin-bottom: 8px; }
.demo-load-fill { height: 100%; width: 25%; background: var(--green); border-radius: var(--radius-pill); transition: width 0.2s ease, background 0.3s ease; }
.demo-load-label { font-size: 0.85rem; color: var(--text); }
.demo-slider-row { display: flex; align-items: center; gap: 10px; font-size: 0.85rem; color: var(--text-muted); }
.demo-slider { flex: 1; height: 6px; accent-color: var(--accent); }
.demo-slider-val { font-family: var(--font-mono); font-size: 0.82rem; color: var(--accent); min-width: 28px; text-align: right; }

/* LB animation for comparisons */
.lb-anim { padding: 12px 0; display: flex; flex-direction: column; align-items: center; gap: 8px; margin: 14px 0; }
.lb-node {
  background: var(--accent);
  color: #000;
  font-family: var(--font-display);
  font-size: 0.85rem;
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  text-align: center;
  box-shadow: 0 0 20px rgba(0,194,255,0.4);
}
.lb-arrows {
  display: flex;
  justify-content: center;
  gap: 24px;
  color: var(--accent);
  font-size: 1.3rem;
  animation: pulse 1.6s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity: 0.4; } 50% { opacity: 1; } }
.lb-servers { display: flex; gap: 10px; }
.lb-server {
  background: var(--card);
  border: 1px solid var(--green);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 0.8rem;
  text-align: center;
  color: var(--green);
  font-family: var(--font-display);
  box-shadow: 0 0 12px rgba(0,230,118,0.15);
}

/* ── QUIZ SCREEN ────────────────────────────────────────────────────── */
.quiz-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 0 12px;
  flex-shrink: 0;
}
.quiz-progress-bar {
  flex: 1;
  height: 6px;
  background: var(--border);
  border-radius: var(--radius-pill);
  overflow: hidden;
}
.quiz-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--green));
  border-radius: var(--radius-pill);
  transition: width 0.4s ease;
  box-shadow: 0 0 8px rgba(0,194,255,0.4);
}
.quiz-counter { font-family: var(--font-mono); font-size: 0.82rem; color: var(--text-muted); flex-shrink: 0; }

.quiz-type-badge {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  align-self: flex-start;
  margin-bottom: 10px;
  border: 1px solid rgba(0,194,255,0.2);
}

.quiz-question {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--text);
  line-height: 1.35;
  margin-bottom: 20px;
}

.quiz-options { display: flex; flex-direction: column; gap: 10px; margin-bottom: 18px; }
.quiz-option {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  text-align: left;
  font-size: 0.95rem;
  color: var(--text);
  transition: border-color var(--transition), background var(--transition);
  line-height: 1.4;
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
}
.quiz-option:hover { border-color: var(--accent); background: var(--accent-dim); }
.quiz-option.selected { border-color: var(--accent); background: var(--accent-dim); color: var(--accent); }
.quiz-option.correct  { border-color: var(--green); background: var(--green-dim); color: var(--green); }
.quiz-option.wrong    { border-color: var(--danger); background: var(--danger-dim); color: var(--danger); }
.quiz-option.revealed { border-color: var(--green); background: var(--green-dim); color: var(--green); }
.quiz-option.disabled { pointer-events: none; opacity: 0.6; }

.opt-marker {
  width: 24px; height: 24px;
  border-radius: 50%;
  border: 2px solid currentColor;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem;
  flex-shrink: 0;
  font-weight: 700;
  transition: background var(--transition);
}
.quiz-option.selected .opt-marker,
.quiz-option.correct .opt-marker,
.quiz-option.wrong .opt-marker,
.quiz-option.revealed .opt-marker {
  background: currentColor;
  color: #000;
}

.quiz-checkbox {
  width: 22px; height: 22px;
  border-radius: 6px;
  border: 2px solid currentColor;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.8rem;
  flex-shrink: 0;
  transition: background var(--transition);
}
.quiz-option.selected .quiz-checkbox { background: currentColor; color: #000; }

/* Ordering */
.ord-slots-zone {
  background: var(--surface);
  border: 2px dashed var(--border-bright);
  border-radius: var(--radius-sm);
  padding: 12px;
  margin-bottom: 14px;
  min-height: 80px;
}
.ord-slots-label { font-size: 0.75rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 10px; }
.ord-slots { display: flex; flex-direction: column; gap: 6px; }
.ord-slot {
  background: var(--border);
  border-radius: 8px;
  min-height: 42px;
  display: flex;
  align-items: center;
  padding: 6px 10px;
  cursor: pointer;
  transition: background var(--transition);
}
.ord-slot.empty { background: rgba(255,255,255,0.02); border: 1px dashed var(--border); }
.ord-slot-num { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-dim); margin-right: 8px; flex-shrink: 0; }
.ord-chip-placed { font-size: 0.88rem; color: var(--text); flex: 1; }
.ord-slot:hover .ord-chip-placed { color: var(--danger); }
.ord-slot.correct-slot { background: var(--green-dim); border: 1px solid var(--green); }
.ord-slot.wrong-slot   { background: var(--danger-dim); border: 1px solid var(--danger); }

.ord-bank-zone { margin-bottom: 14px; }
.ord-bank-label { font-size: 0.75rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 8px; }
.ord-bank { display: flex; flex-wrap: wrap; gap: 8px; }
.ord-bank-chip {
  background: var(--card);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-sm);
  padding: 8px 14px;
  font-size: 0.88rem;
  color: var(--text);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
}
.ord-bank-chip:hover, .ord-bank-chip:active {
  border-color: var(--accent);
  background: var(--accent-dim);
  color: var(--accent);
  transform: scale(1.03);
}

/* Quiz feedback */
.quiz-feedback {
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  margin: 12px 0;
  font-size: 0.9rem;
  line-height: 1.5;
  animation: feedbackIn 0.25s ease;
}
@keyframes feedbackIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.quiz-feedback.correct { background: var(--green-dim); border: 1px solid var(--green); color: var(--green); }
.quiz-feedback.wrong   { background: var(--danger-dim); border: 1px solid var(--danger); color: var(--danger); }
.quiz-feedback-title   { font-family: var(--font-display); font-size: 1.05rem; margin-bottom: 4px; }
.quiz-feedback-body    { color: var(--text); opacity: 0.9; }

/* Quiz results */
.quiz-results {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 30px 0 20px;
  text-align: center;
  gap: 16px;
  flex: 1;
}
.results-emoji { font-size: 4rem; animation: bounceIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1); }
@keyframes bounceIn { from { opacity:0; transform:scale(0.3); } to { opacity:1; transform:scale(1); } }
.results-title { font-family: var(--font-display); font-size: 1.8rem; color: var(--text); }
.results-stars { font-size: 2rem; letter-spacing: 4px; }
.results-score { font-size: 0.95rem; color: var(--text-muted); }
.results-xp {
  background: var(--accent-dim);
  border: 1px solid rgba(0,194,255,0.3);
  border-radius: var(--radius-pill);
  padding: 8px 24px;
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--accent);
  box-shadow: 0 0 15px rgba(0,194,255,0.15);
}
.results-actions { display: flex; flex-direction: column; gap: 10px; width: 100%; margin-top: 8px; }

/* ── GAME SCREEN ────────────────────────────────────────────────────── */
.game-wrapper { flex: 1; display: flex; flex-direction: column; padding: 0 0 8px; }
.game-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0 8px;
  flex-shrink: 0;
  gap: 8px;
}
.game-stat {
  display: flex;
  align-items: center;
  gap: 5px;
  background: var(--card);
  border: 1px solid var(--border);
  padding: 6px 10px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 0.82rem;
}
.game-stat.timer { color: var(--amber); }
.game-stat.score { color: var(--accent); }
.game-stat.uptime { color: var(--green); }
.game-stat.budget { color: var(--purple); }
.game-stat.timer.urgent { color: var(--danger); animation: timerPulse 0.8s ease infinite; }
@keyframes timerPulse { 0%,100% { opacity:1; } 50% { opacity:0.5; } }
.game-stat.uptime.low { color: var(--danger); animation: timerPulse 0.8s ease infinite; }

/* Packet zone */
.game-packet-zone {
  flex-shrink: 0;
  background: var(--zone-bg);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius);
  padding: 16px 14px;
  margin-bottom: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
  overflow: hidden;
}
.game-packet-zone::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 20px,
    rgba(0,194,255,0.015) 20px,
    rgba(0,194,255,0.015) 21px
  );
  pointer-events: none;
}

/* Packet badge */
.packet-type-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  align-self: flex-start;
}
.packet-type-badge.public  { background: rgba(0,194,255,0.15); color: var(--accent); border: 1px solid rgba(0,194,255,0.3); }
.packet-type-badge.private { background: rgba(180,79,255,0.15); color: var(--purple); border: 1px solid rgba(180,79,255,0.3); }

.packet-info-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.packet-info-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 5px 10px;
  font-size: 0.78rem;
}
.packet-info-label { color: var(--text-muted); font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.5px; }
.packet-info-value { color: var(--text); font-family: var(--font-mono); font-size: 0.8rem; }

.packet-scenario-q {
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--text);
  line-height: 1.35;
  padding: 10px 12px;
  background: var(--surface);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

/* Route table in game */
.game-rtb-wrap {
  flex-shrink: 0;
  margin-bottom: 10px;
}
.game-rtb-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.game-rtb {
  background: var(--surface);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-sm);
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}
.game-rtb-head {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 6px 12px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.game-rtb-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  align-items: center;
}
.game-rtb-row:last-child { border-bottom: none; }
.game-rtb-dest { color: var(--text); }
.game-rtb-target-local { color: var(--green); }
.game-rtb-target-empty {
  color: var(--danger);
  font-weight: 700;
  animation: blinkText 1s ease infinite;
}
@keyframes blinkText { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }

/* Target buttons */
.game-targets-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.game-targets {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex-shrink: 0;
}
.target-btn {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
  width: 100%;
  text-align: left;
}
.target-btn:hover, .target-btn:active {
  border-color: var(--accent);
  background: var(--accent-dim);
  transform: translateX(4px);
}
.target-btn.correct {
  border-color: var(--green);
  background: var(--green-dim);
  animation: correctFlash 0.4s ease;
}
.target-btn.wrong {
  border-color: var(--danger);
  background: var(--danger-dim);
  animation: shake 0.3s ease;
}
.target-btn:disabled { pointer-events: none; }
@keyframes correctFlash { 0%,100% { transform:scale(1); } 50% { transform:scale(1.02); } }

.target-icon { font-size: 1.4rem; flex-shrink: 0; }
.target-id {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text);
  flex: 1;
}
.target-desc { font-size: 0.75rem; color: var(--text-muted); line-height: 1.3; }

/* Game feedback bar */
.game-feedback-bar {
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  margin-bottom: 8px;
  font-size: 0.87rem;
  line-height: 1.5;
  animation: feedbackIn 0.25s ease;
  flex-shrink: 0;
}
.game-feedback-bar.correct { background: var(--green-dim); border: 1px solid var(--green); color: var(--green); }
.game-feedback-bar.wrong   { background: var(--danger-dim); border: 1px solid var(--danger); color: var(--danger); }
.game-feedback-body        { color: var(--text); font-size: 0.82rem; margin-top: 3px; }

/* Uptime drop animation */
.uptime-drop {
  position: fixed;
  top: 20%;
  right: 20px;
  background: var(--danger);
  color: #fff;
  font-family: var(--font-display);
  font-size: 1.1rem;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  z-index: 9999;
  pointer-events: none;
  animation: dropFly 1.5s ease forwards;
}
@keyframes dropFly {
  0%   { opacity: 0; transform: translateY(20px); }
  20%  { opacity: 1; transform: translateY(0); }
  80%  { opacity: 1; transform: translateY(-10px); }
  100% { opacity: 0; transform: translateY(-30px); }
}

/* Game start / end */
.game-start {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 16px;
  padding: 20px;
}
.game-title {
  font-family: var(--font-display);
  font-size: 1.9rem;
  color: var(--text);
}
.game-subtitle { font-size: 0.9rem; color: var(--text-muted); max-width: 280px; line-height: 1.5; }
.game-how {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  text-align: left;
  width: 100%;
  max-width: 340px;
}
.game-how-title { font-family: var(--font-display); font-size: 1rem; color: var(--accent); margin-bottom: 8px; }
.game-how-item {
  display: flex;
  gap: 8px;
  font-size: 0.87rem;
  color: var(--text-muted);
  margin-bottom: 6px;
  line-height: 1.4;
}

/* Pipeline Builder game */
.pipeline-stage-zone {
  flex-shrink: 0;
  background: var(--zone-bg);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius);
  padding: 14px;
  margin-bottom: 12px;
}
.pipeline-stage-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  margin-bottom: 10px;
}
.pipeline-slots {
  display: flex;
  gap: 6px;
  align-items: center;
}
.pipeline-slot {
  flex: 1;
  background: var(--surface);
  border: 2px dashed var(--border-bright);
  border-radius: var(--radius-sm);
  padding: 10px 8px;
  text-align: center;
  min-height: 60px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}
.pipeline-slot.filled { border-style: solid; border-color: var(--accent); background: var(--accent-dim); cursor: pointer; }
.pipeline-slot.correct-slot { border-color: var(--green); background: var(--green-dim); }
.pipeline-slot.wrong-slot   { border-color: var(--danger); background: var(--danger-dim); }
.pipeline-slot-num { font-size: 0.65rem; color: var(--text-dim); font-family: var(--font-mono); }
.pipeline-slot-text { font-family: var(--font-display); font-size: 0.78rem; color: var(--text); line-height: 1.2; }
.pipeline-connector {
  width: 20px;
  height: 2px;
  background: linear-gradient(90deg, var(--pipeline-dash), var(--accent));
  flex-shrink: 0;
  position: relative;
}
.pipeline-connector::after {
  content: '▶';
  position: absolute;
  right: -6px;
  top: -7px;
  font-size: 0.6rem;
  color: var(--accent);
}

.pipeline-bank { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; flex-shrink: 0; }
.pipeline-chip {
  background: var(--card);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-sm);
  padding: 8px 14px;
  font-family: var(--font-display);
  font-size: 0.88rem;
  color: var(--text);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}
.pipeline-chip:hover, .pipeline-chip:active {
  border-color: var(--accent);
  background: var(--accent-dim);
  color: var(--accent);
  transform: scale(1.04);
}

/* XP Toast */
.xp-toast {
  position: fixed;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--accent), #0090CC);
  color: #000;
  font-family: var(--font-display);
  font-size: 1.3rem;
  padding: 10px 28px;
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-glow);
  z-index: 9999;
  pointer-events: none;
  animation: toastPop 1.8s ease forwards;
  font-weight: 700;
}
@keyframes toastPop {
  0%   { opacity:0; transform:translateX(-50%) scale(0.6) translateY(20px); }
  20%  { opacity:1; transform:translateX(-50%) scale(1.05) translateY(0); }
  80%  { opacity:1; transform:translateX(-50%) scale(1) translateY(0); }
  100% { opacity:0; transform:translateX(-50%) scale(0.9) translateY(-20px); }
}

/* ── UTILITIES ──────────────────────────────────────────────────────── */
.mt-8  { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.text-center { text-align: center; }
.flex-center { display:flex; align-items:center; justify-content:center; }
code {
  font-family: var(--font-mono);
  font-size: 0.82em;
  background: rgba(0,194,255,0.08);
  color: var(--accent);
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid rgba(0,194,255,0.15);
}
pre code {
  display: block;
  padding: 12px;
  border-radius: 8px;
  font-size: 0.78rem;
  line-height: 1.6;
  overflow-x: auto;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
}

/* IAM / Permission game */
.perm-request-zone {
  background: var(--zone-bg);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius);
  padding: 16px 14px;
  margin-bottom: 10px;
  flex-shrink: 0;
}
.perm-request-label { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.8px; color: var(--text-muted); margin-bottom: 8px; }
.perm-request-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  display: flex;
  gap: 12px;
  align-items: flex-start;
}
.perm-who { font-family: var(--font-display); font-size: 1rem; color: var(--text); }
.perm-action { font-family: var(--font-mono); font-size: 0.82rem; color: var(--amber); margin-top: 3px; }
.perm-resource { font-size: 0.78rem; color: var(--text-muted); margin-top: 2px; }
.perm-choices { display: flex; gap: 10px; flex-shrink: 0; }
.perm-btn {
  flex: 1;
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
  text-align: center;
}
.perm-btn:hover { transform: translateY(-2px); }
.perm-btn.allow { border-color: rgba(0,230,118,0.3); }
.perm-btn.allow:hover { border-color: var(--green); background: var(--green-dim); }
.perm-btn.deny  { border-color: rgba(255,64,64,0.3); }
.perm-btn.deny:hover  { border-color: var(--danger); background: var(--danger-dim); }
.perm-btn.correct { animation: correctFlash 0.4s ease; }
.perm-btn.wrong   { animation: shake 0.3s ease; }
.perm-btn:disabled { pointer-events: none; opacity: 0.5; }
.perm-btn-icon  { font-size: 1.8rem; }
.perm-btn-label { font-family: var(--font-display); font-size: 1rem; color: var(--text); }

/* ══════════════════════════════════════════════════════════════════════
   DESKTOP LAYOUT  ≥ 768 px
══════════════════════════════════════════════════════════════════════ */
@media (min-width: 768px) {
  body { overflow: hidden; }
  #install-banner { max-width: none; }

  #main-wrap {
    flex-direction: row;
    max-width: none;
    margin: 0;
    height: 100%;
  }
  #screens-wrap { flex: 1; min-width: 0; }

  .nav-bottom { display: none !important; }
  .screen { padding-bottom: 0; }
  .screen-inner { max-width: 800px; margin: 0 auto; padding: 0 32px; }

  /* ── SIDEBAR ─────────────────────────────────────────────────────── */
  .sidebar {
    display: flex;
    flex-direction: column;
    width: 268px;
    flex-shrink: 0;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    overflow-x: hidden;
    height: 100%;
  }
  .sidebar::-webkit-scrollbar { width: 4px; }
  .sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

  .sb-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 22px 18px 16px;
    cursor: pointer;
    transition: opacity var(--transition);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
  }
  .sb-header:hover { opacity: 0.85; }
  .sb-logo { width: 38px; height: 38px; border-radius: 10px; flex-shrink: 0; filter: drop-shadow(0 0 8px rgba(0,194,255,0.4)); }
  .sb-app-name { font-family: var(--font-display); font-size: 1.15rem; color: var(--text); line-height: 1.1; }
  .sb-app-sub { font-size: 0.68rem; color: var(--text-muted); letter-spacing: 0.4px; margin-top: 1px; }

  .sb-user { padding: 14px 18px 12px; border-bottom: 1px solid var(--border); flex-shrink: 0; }
  .sb-user-row { display: flex; align-items: center; gap: 6px; margin-bottom: 8px; }
  .sb-level-pill {
    background: var(--accent-dim);
    color: var(--accent);
    font-family: var(--font-display);
    font-size: 0.72rem;
    padding: 2px 10px;
    border-radius: var(--radius-pill);
    border: 1px solid rgba(0,194,255,0.25);
    flex-shrink: 0;
  }
  .sb-rank { font-size: 0.78rem; color: var(--text-muted); flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .sb-streak { font-size: 0.78rem; color: var(--amber); flex-shrink: 0; }
  .sb-xp-bar { height: 4px; background: var(--border); border-radius: var(--radius-pill); overflow: hidden; margin-bottom: 4px; }
  .sb-xp-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--green));
    border-radius: var(--radius-pill);
    box-shadow: 0 0 6px rgba(0,194,255,0.4);
  }
  .sb-xp-label { font-size: 0.68rem; color: var(--text-dim); text-align: right; }

  /* Uptime/Budget in sidebar */
  .sb-sys { padding: 10px 18px 12px; border-bottom: 1px solid var(--border); flex-shrink: 0; }
  .sb-sys-row { display: flex; justify-content: space-between; align-items: center; }
  .sb-sys-item { display: flex; flex-direction: column; gap: 2px; }
  .sb-sys-label { font-size: 0.62rem; text-transform: uppercase; letter-spacing: 0.6px; color: var(--text-muted); }
  .sb-sys-val { font-family: var(--font-mono); font-size: 0.88rem; }
  .sb-sys-val.green { color: var(--green); }
  .sb-sys-val.amber { color: var(--amber); }
  .sb-sys-val.danger { color: var(--danger); }

  .sb-section-label { padding: 14px 18px 6px; font-size: 0.68rem; text-transform: uppercase; letter-spacing: 1px; color: var(--text-dim); flex-shrink: 0; }

  .sb-topics { flex: 1; display: flex; flex-direction: column; padding: 2px 10px 10px; gap: 1px; }
  .sb-topic {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 10px;
    border-radius: 10px;
    cursor: pointer;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    transition: background var(--transition), color var(--transition), transform var(--transition);
    color: var(--text-muted);
    border-left: 2px solid transparent;
  }
  .sb-topic:hover { background: var(--card); color: var(--text); transform: translateX(2px); }
  .sb-topic.sb-active { background: var(--accent-dim); color: var(--accent); border-left-color: var(--accent); }
  .sb-topic.sb-locked { opacity: 0.3; cursor: default; pointer-events: none; }
  .sb-topic-emoji { font-size: 1.1rem; flex-shrink: 0; }
  .sb-topic-name  { font-size: 0.85rem; flex: 1; font-weight: 500; line-height: 1.2; }
  .sb-topic-stars { font-size: 0.72rem; flex-shrink: 0; letter-spacing: 1px; }

  .sb-divider { height: 1px; background: var(--border); margin: 6px 10px; flex-shrink: 0; }

  .sb-footer {
    padding: 12px 18px;
    border-top: 1px solid var(--border);
    flex-shrink: 0;
    font-size: 0.68rem;
    color: var(--text-dim);
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  /* ── HOME SCREEN — desktop ──────────────────────────────────────── */
  .home-header { display: none; }
  .xp-card     { display: none; }
  .sys-health-card { display: none; }

  .desktop-welcome {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 28px 0 20px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 20px;
  }
  .desktop-welcome-text h2 { font-family: var(--font-display); font-size: 2rem; color: var(--text); margin-bottom: 6px; }
  .desktop-welcome-text p  { font-size: 0.95rem; color: var(--text-muted); max-width: 420px; line-height: 1.5; }
  .desktop-welcome-stats   { display: flex; gap: 12px; flex-shrink: 0; }
  .desktop-stat-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 18px;
    text-align: center;
    min-width: 90px;
  }
  .desktop-stat-val   { font-family: var(--font-mono); font-size: 1.3rem; line-height: 1; }
  .desktop-stat-val.cyan { color: var(--accent); }
  .desktop-stat-val.green { color: var(--green); }
  .desktop-stat-val.amber { color: var(--amber); }
  .desktop-stat-label { font-size: 0.68rem; color: var(--text-muted); margin-top: 3px; text-transform: uppercase; letter-spacing: 0.5px; }

  .topic-grid { grid-template-columns: repeat(3, 1fr); gap: 14px; }
  .topic-card { min-height: 150px; padding: 20px 16px 16px; }
  .topic-card-emoji { font-size: 2.4rem; }
  .topic-card-name  { font-size: 1rem; }

  /* ── HUB SCREEN — desktop ──────────────────────────────────────── */
  .hub-header { padding: 24px 0 16px; }
  .hub-hero { flex-direction: row; text-align: left; align-items: center; gap: 24px; padding: 24px 28px; }
  .hub-emoji { font-size: 3rem; margin-bottom: 0; flex-shrink: 0; }
  .hub-title { font-size: 2rem; }
  .hub-metaphor { max-width: none; }
  .hub-modes { flex-direction: row; gap: 12px; }
  .mode-card { flex: 1; flex-direction: column; align-items: center; text-align: center; gap: 8px; padding: 20px 14px; }
  .mode-icon { font-size: 2rem; }
  .mode-xp   { margin-left: 0; margin-top: 6px; }

  /* ── STUDY SCREEN — desktop ─────────────────────────────────────── */
  .study-heading { font-size: 1.75rem; }
  .study-p       { font-size: 1rem; line-height: 1.7; }
  .algo-grid    { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
  .concept-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

  /* ── QUIZ — desktop ─────────────────────────────────────────────── */
  .quiz-question { font-size: 1.4rem; }
  .quiz-option   { padding: 16px 20px; font-size: 1rem; }
  .ord-bank      { gap: 10px; }
  .ord-bank-chip { padding: 10px 18px; font-size: 0.92rem; }

  /* ── GAME — desktop ─────────────────────────────────────────────── */
  .game-wrapper  { max-width: 680px; margin: 0 auto; width: 100%; }
  .game-targets  { gap: 10px; }
  .target-btn    { padding: 14px 18px; }
  .pipeline-slots { gap: 8px; }
}

/* ═══════════════════════════════════════════════════════════════════════
   APP SUPPLEMENT — classes used by app.js
═══════════════════════════════════════════════════════════════════════ */

/* ── Uptime / Budget fills (used in sidebar + home) ─────────────── */
.uptime-fill, .budget-fill {
  height: 100%;
  border-radius: 999px;
  transition: width 0.4s ease;
}
.uptime-val, .budget-val {
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

/* ── Home stats grid (2×2) ───────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 10px;
  flex-shrink: 0;
}
.stat-cell {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
}
.stat-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.stat-value {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1;
}

/* ── Home screen ─────────────────────────────────────────────────── */
.home-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 32px 16px 20px;
  gap: 8px;
}
.home-logo-wrap { width: 72px; height: 72px; margin-bottom: 4px; }
.home-logo { width: 72px; height: 72px; border-radius: 20px; filter: drop-shadow(0 0 14px rgba(0,194,255,0.5)); }
.home-title {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--text);
  line-height: 1.1;
}
.home-tagline { font-size: 0.9rem; color: var(--text-muted); }

/* ── Topic grid (home) ───────────────────────────────────────────── */
.topic-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 16px;
}
.topic-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 12px 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  text-align: center;
  transition: border-color var(--transition), transform var(--transition);
}
.topic-card:not(.locked):hover { border-color: var(--tc, var(--accent)); transform: translateY(-2px); }
.topic-card.locked { opacity: 0.45; cursor: default; }
.tc-emoji  { font-size: 1.8rem; }
.tc-name   { font-size: 0.82rem; font-weight: 600; color: var(--text); }
.tc-status { font-size: 0.7rem; color: var(--text-muted); }

/* ── Level card ──────────────────────────────────────────────────── */
.level-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 12px;
  flex-shrink: 0;
}
.level-header { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.level-icon   { font-size: 1.2rem; }
.level-title  { font-family: var(--font-display); font-size: 1rem; }
.xp-bar-wrap  { display: flex; align-items: center; gap: 10px; }
.xp-bar       { flex: 1; height: 6px; background: var(--border); border-radius: 999px; overflow: hidden; }
.xp-bar-fill  { height: 100%; border-radius: 999px; transition: width 0.5s ease; }
.xp-bar-label { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-muted); white-space: nowrap; }

/* ── XP Toast ────────────────────────────────────────────────────── */
.xp-toast {
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--accent);
  color: #000;
  padding: 8px 18px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.88rem;
  opacity: 0;
  transition: opacity 0.3s ease, transform 0.3s ease;
  z-index: 9999;
  pointer-events: none;
  box-shadow: 0 0 16px rgba(0,194,255,0.5);
}
.xp-toast.visible { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── Uptime drop toast ───────────────────────────────────────────── */
.uptime-drop {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: var(--danger);
  color: #fff;
  padding: 8px 18px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.88rem;
  opacity: 0;
  transition: opacity 0.3s ease, transform 0.3s ease;
  z-index: 9999;
  pointer-events: none;
}
.uptime-drop.visible { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── Progress dots ───────────────────────────────────────────────── */
.progress-indicator {
  display: flex;
  justify-content: center;
  gap: 6px;
  padding: 8px 0;
}
.prog-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--border);
  transition: background 0.3s ease, transform 0.2s ease;
}
.prog-dot.active { background: var(--accent); transform: scale(1.3); }

/* ── Study nav ───────────────────────────────────────────────────── */
.study-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 12px 0 24px;
}

/* ── Quiz additions ──────────────────────────────────────────────── */
.quiz-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.quiz-counter {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
  white-space: nowrap;
}
.quiz-prog-bar {
  flex: 1;
  height: 4px;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
}
.quiz-prog-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 999px;
  transition: width 0.4s ease;
}
.quiz-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 14px;
  margin-bottom: 10px;
}
.quiz-q {
  font-size: 1rem;
  color: var(--text);
  line-height: 1.5;
  margin-bottom: 14px;
  font-weight: 600;
}
.quiz-options { display: flex; flex-direction: column; gap: 8px; }
.quiz-select-hint { font-size: 0.78rem; color: var(--amber); margin-bottom: 6px; }

/* ── Order (tap-to-sequence) quiz ────────────────────────────────── */
.ord-chip {
  text-align: left;
  font-size: 0.85rem;
}
.order-placed {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 10px;
  min-height: 32px;
}
.ord-placed-chip {
  background: var(--accent-dim);
  border: 1px solid rgba(0,194,255,0.35);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 0.83rem;
  color: var(--text);
}
.order-bank { display: flex; flex-direction: column; gap: 6px; }

/* ── Feedback bottom sheet (quiz + game) ─────────────────────────── */
.fb-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  z-index: 1000;
  opacity: 0;
  transition: opacity 0.25s ease;
}
.fb-backdrop.visible { opacity: 1; }

.fb-sheet {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1001;
  border-radius: 24px 24px 0 0;
  padding: 12px 20px 36px;
  transform: translateY(100%);
  transition: transform 0.3s cubic-bezier(0.34,1.1,0.64,1);
  max-width: 540px;
  margin: 0 auto;
}
.fb-sheet.visible { transform: translateY(0); }
.fb-sheet.correct {
  background: #071f0e;
  border: 1px solid var(--green);
  border-bottom: none;
  box-shadow: 0 -8px 40px rgba(0,230,118,0.25);
}
.fb-sheet.wrong {
  background: #1f0707;
  border: 1px solid var(--danger);
  border-bottom: none;
  box-shadow: 0 -8px 40px rgba(255,64,64,0.25);
}

.fb-sheet-bar {
  width: 40px;
  height: 4px;
  background: rgba(255,255,255,0.15);
  border-radius: 999px;
  margin: 0 auto 16px;
}
.fb-sheet-icon {
  font-size: 2rem;
  margin-bottom: 6px;
}
.fb-sheet-result {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin-bottom: 10px;
}
.fb-sheet.correct .fb-sheet-result { color: var(--green); }
.fb-sheet.wrong   .fb-sheet-result { color: var(--danger); }
.fb-sheet-text {
  font-size: 0.88rem;
  color: var(--text);
  line-height: 1.6;
  margin-bottom: 18px;
}
.fb-sheet-btn { width: 100%; }

/* ── Results screen ──────────────────────────────────────────────── */
.results-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 18px;
  text-align: center;
  margin-top: 16px;
}
.results-emoji { font-size: 2.8rem; margin-bottom: 8px; }
.results-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--text);
  margin-bottom: 12px;
}
.results-score { font-family: var(--font-mono); font-size: 2rem; color: var(--accent); line-height: 1; }
.results-pct   { font-family: var(--font-mono); font-size: 1.1rem; color: var(--text-muted); margin-bottom: 12px; }
.results-bar   { height: 8px; background: var(--border); border-radius: 999px; overflow: hidden; margin-bottom: 12px; }
.results-bar-fill { height: 100%; border-radius: 999px; transition: width 0.6s ease; }
.results-msg   { font-size: 0.88rem; margin-bottom: 14px; }
.results-actions { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }

/* ── Hub list & items ────────────────────────────────────────────── */
.hub-list { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; }
.hub-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 12px;
  cursor: pointer;
  transition: border-color var(--transition), transform var(--transition);
}
.hub-item:not(.locked):hover { border-color: var(--accent); transform: translateX(2px); }
.hub-item.locked { opacity: 0.45; cursor: default; }
.hub-emoji { font-size: 1.8rem; flex-shrink: 0; }
.hub-info  { flex: 1; min-width: 0; }
.hub-name  { font-weight: 700; color: var(--text); font-size: 0.95rem; }
.hub-desc  { font-size: 0.78rem; color: var(--text-muted); margin-top: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.hub-progress { display: flex; gap: 10px; margin-top: 6px; }
.hub-progress span { font-size: 0.7rem; color: var(--text-muted); }
.hub-progress span.done { color: var(--green); }
.hub-arrow { font-size: 1rem; color: var(--text-muted); flex-shrink: 0; }

/* ── Hub hero card ───────────────────────────────────────────────── */
.hub-hero {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 16px;
  text-align: center;
  margin-bottom: 14px;
}
.hub-hero-emoji { font-size: 2.5rem; margin-bottom: 6px; }
.hub-hero-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  margin-bottom: 6px;
}
.hub-hero-desc   { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 8px; }
.hub-metaphor    { font-size: 0.82rem; color: var(--text-muted); font-style: italic; }

/* ── Activity list ───────────────────────────────────────────────── */
.activity-list { display: flex; flex-direction: column; gap: 8px; }
.activity-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 12px;
  cursor: pointer;
  transition: border-color var(--transition);
}
.activity-item:hover { border-color: var(--accent); }
.activity-item.done { border-color: rgba(0,230,118,0.3); }
.act-icon { font-size: 1.6rem; flex-shrink: 0; }
.act-info { flex: 1; }
.act-name { font-weight: 700; color: var(--text); font-size: 0.95rem; }
.act-desc { font-size: 0.78rem; color: var(--text-muted); margin-top: 2px; }
.act-state { font-size: 1rem; flex-shrink: 0; }

/* ── Game header & badges ────────────────────────────────────────── */
.game-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  gap: 8px;
  flex-wrap: wrap;
}
.game-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--accent);
}
.game-meta { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.game-score-badge, .uptime-badge, .scenario-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--card);
  border: 1px solid var(--border);
}
.game-score-badge { color: var(--accent); border-color: rgba(0,194,255,0.25); }
.scenario-badge   { color: var(--text-muted); }

/* ── Packet info ─────────────────────────────────────────────────── */
.packet-subnet { font-size: 0.72rem; color: var(--text-muted); }
.pi-label { font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.6px; color: var(--text-muted); display: block; }
.pi-val   { font-family: var(--font-mono); font-size: 0.85rem; color: var(--text); }

/* ── Route table game extras ─────────────────────────────────────── */
.game-rtb-label { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 6px; }
.target-btns { display: flex; flex-direction: column; gap: 8px; margin-top: 10px; }
.target-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  cursor: pointer;
  text-align: left;
  transition: border-color var(--transition), transform var(--transition);
  width: 100%;
}
.target-btn:hover { border-color: var(--accent); transform: translateX(3px); }
.target-btn.target-correct { border-color: var(--green); background: rgba(0,230,118,0.08); }
.target-btn.target-wrong   { border-color: var(--danger); background: rgba(255,64,64,0.08); }
.target-btn:disabled       { pointer-events: none; opacity: 0.6; }
.target-icon { font-size: 1.4rem; flex-shrink: 0; }
.target-id   { font-family: var(--font-mono); font-size: 0.82rem; color: var(--accent); flex-shrink: 0; }
.target-desc { font-size: 0.75rem; color: var(--text-muted); flex: 1; }

/* ── Pipeline game ───────────────────────────────────────────────── */
.pipeline-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 14px;
}
.pipeline-q { font-size: 0.92rem; font-weight: 600; color: var(--text); margin-bottom: 14px; line-height: 1.5; }
.pipeline-stage-hint { font-size: 0.72rem; color: var(--text-muted); margin-bottom: 8px; }
.fb-correct { font-family: var(--font-mono); font-size: 0.78rem; color: var(--green); margin-top: 6px; }

/* ── Scenario game ───────────────────────────────────────────────── */
.scenario-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 14px;
}
.scenario-context {
  font-size: 0.92rem;
  color: var(--text);
  line-height: 1.55;
  margin-bottom: 14px;
  font-weight: 500;
}
.scenario-opts { display: flex; flex-direction: column; gap: 8px; }
.scenario-opt {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  cursor: pointer;
  text-align: left;
  transition: border-color var(--transition), background var(--transition);
  width: 100%;
}
.scenario-opt:hover { border-color: var(--accent); background: var(--accent-dim); }
.scenario-opt.target-correct { border-color: var(--green); background: rgba(0,230,118,0.08); }
.scenario-opt.target-wrong   { border-color: var(--danger); background: rgba(255,64,64,0.08); }
.scenario-opt:disabled { pointer-events: none; }
.sc-label { font-weight: 700; color: var(--text); font-size: 0.88rem; }
.sc-desc  { font-size: 0.75rem; color: var(--text-muted); }

/* ── IAM guard extras ────────────────────────────────────────────── */
.perm-who { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.perm-icon { font-size: 1.6rem; }
.perm-who-label { font-weight: 700; color: var(--text); font-size: 0.95rem; }
.perm-action { margin-bottom: 10px; }
.perm-action-label { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-muted); margin-bottom: 4px; }
.perm-action-val { font-family: var(--font-mono); font-size: 0.85rem; color: var(--amber); }
.perm-context { font-size: 0.82rem; color: var(--text-muted); line-height: 1.5; }
.perm-decision { padding: 12px 0; }
.perm-q { font-size: 0.88rem; color: var(--text); margin-bottom: 12px; font-weight: 600; }
.perm-btns { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
}