@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Fira+Code:wght@400;500;600&display=swap";:root{--bg-primary:#fff;--bg-secondary:#f8fafc;--bg-card:#fff;--bg-panel:#f1f5f9;--border-color:#e2e8f0;--border-subtle:#cbd5e1;--border-focus:#3b82f6;--text-primary:#0f172a;--text-secondary:#334155;--text-muted:#64748b;--text-dim:#94a3b8;--blue-50:#eff6ff;--blue-100:#dbeafe;--blue-200:#bfdbfe;--blue-400:#60a5fa;--blue-500:#3b82f6;--blue-600:#2563eb;--blue-700:#1d4ed8;--emerald-500:#10b981;--emerald-600:#059669;--rose-500:#f43f5e;--rose-600:#e11d48;--amber-500:#f59e0b;--amber-600:#d97706;--purple-500:#8b5cf6;--purple-600:#7c3aed;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #00000012, 0 2px 4px -2px #0000000d;--shadow-lg:0 10px 15px -3px #00000014, 0 4px 6px -4px #0000000a}.dark{--bg-primary:#090d16;--bg-secondary:#0f172a;--bg-card:#131d31;--bg-panel:#1e293b;--border-color:#1e293b;--border-subtle:#334155;--border-focus:#38bdf8;--text-primary:#f8fafc;--text-secondary:#cbd5e1;--text-muted:#94a3b8;--text-dim:#64748b;--blue-50:#2563eb1f;--blue-100:#2563eb33;--blue-200:#3b82f64d}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-secondary);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.5}.app-container{flex-direction:column;min-height:100vh;display:flex}.app-header{z-index:50;background-color:var(--bg-primary);border-bottom:1px solid var(--border-color);box-shadow:var(--shadow-sm);justify-content:space-between;align-items:center;padding:10px 24px;display:flex;position:sticky;top:0}.header-left{align-items:center;gap:16px;display:flex}.sidebar-toggle-btn{background:var(--bg-secondary);border:1px solid var(--border-color);width:36px;height:36px;color:var(--text-secondary);cursor:pointer;border-radius:8px;justify-content:center;align-items:center;transition:all .2s;display:flex}.sidebar-toggle-btn:hover{background:var(--blue-50);color:var(--blue-600);border-color:var(--blue-200)}.brand-wrapper{align-items:center;gap:10px;text-decoration:none;display:flex}.brand-icon-box{color:#fff;background:linear-gradient(135deg,#2563eb,#0284c7);border-radius:10px;justify-content:center;align-items:center;width:36px;height:36px;display:flex;box-shadow:0 2px 8px #2563eb4d}.brand-title-wrap{align-items:baseline;gap:6px;display:flex}.brand-name{letter-spacing:-.02em;color:var(--text-primary);font-size:1.15rem;font-weight:800}.brand-tag{color:var(--blue-600);letter-spacing:.04em;text-transform:uppercase;font-size:.72rem;font-weight:700}.brand-status-pill{background:var(--blue-50);color:var(--blue-700);border:1px solid var(--blue-200);border-radius:9999px;align-items:center;gap:6px;padding:4px 10px;font-size:.75rem;font-weight:600;display:inline-flex}.pulse-dot{background-color:var(--blue-600);border-radius:50%;width:7px;height:7px;animation:2s ease-in-out infinite pulseDot}@keyframes pulseDot{0%,to{opacity:1;transform:scale(1)}50%{opacity:.6;transform:scale(1.3)}}.header-center{flex:1;max-width:480px;margin:0 24px}.search-input-wrapper{align-items:center;width:100%;display:flex;position:relative}.search-icon{color:var(--text-muted);position:absolute;left:12px}.search-input{background-color:var(--bg-secondary);border:1px solid var(--border-color);width:100%;color:var(--text-primary);border-radius:8px;outline:none;padding:8px 38px 8px 36px;font-size:.85rem;transition:all .2s}.search-input:focus{background-color:var(--bg-primary);border-color:var(--blue-500);box-shadow:0 0 0 3px #2563eb1f}.kbd-shortcut{background-color:var(--bg-primary);border:1px solid var(--border-color);color:var(--text-muted);border-radius:4px;padding:2px 6px;font-size:.68rem;font-weight:600;position:absolute;right:10px}.header-right{align-items:center;gap:12px;display:flex}.theme-toggle-btn{background:var(--bg-secondary);border:1px solid var(--border-color);width:36px;height:36px;color:var(--text-secondary);cursor:pointer;border-radius:8px;justify-content:center;align-items:center;transition:all .2s;display:flex}.theme-toggle-btn:hover{background:var(--blue-50);color:var(--blue-600)}.spec-badge-btn{color:#fff;background:linear-gradient(135deg,#2563eb,#1d4ed8);border:none;border-radius:8px;align-items:center;gap:6px;padding:7px 14px;font-size:.8rem;font-weight:600;display:inline-flex;box-shadow:0 2px 6px #2563eb40}.app-body-layout{flex:1;display:flex;position:relative}.app-sidebar{background-color:var(--bg-primary);border-right:1px solid var(--border-color);flex-direction:column;width:320px;min-width:320px;height:calc(100vh - 57px);display:flex;position:sticky;top:57px;overflow-y:auto}.sidebar-header-section{border-bottom:1px solid var(--border-color);padding:16px 20px 12px}.sidebar-title-row{justify-content:space-between;align-items:center;margin-bottom:10px;display:flex}.sidebar-main-title{color:var(--text-primary);font-size:.95rem;font-weight:700}.modules-count-pill{color:var(--blue-600);background:var(--blue-50);border:1px solid var(--blue-200);border-radius:9999px;padding:2px 8px;font-size:.72rem;font-weight:700}.progress-stats-row{color:var(--text-muted);justify-content:space-between;margin-bottom:6px;font-size:.75rem;font-weight:600;display:flex}.progress-track-bg{background-color:#e2e8f0;border-radius:9999px;height:5px;overflow:hidden}.progress-fill-bar{background:linear-gradient(90deg,#2563eb,#0284c7);border-radius:9999px;height:100%;transition:width .4s}.curriculum-tier-group{border-bottom:1px solid var(--border-color);padding:12px 14px}.tier-group-header{color:var(--text-muted);letter-spacing:.05em;justify-content:space-between;align-items:center;padding:0 8px 8px;font-size:.72rem;font-weight:800;display:flex}.sidebar-question-link{color:var(--text-secondary);border:1px solid #0000;border-radius:8px;justify-content:space-between;align-items:center;margin-bottom:4px;padding:9px 12px;font-size:.83rem;line-height:1.35;text-decoration:none;transition:all .15s;display:flex}.sidebar-question-link:hover{background-color:var(--bg-secondary);color:var(--blue-600)}.sidebar-question-link.active{background-color:var(--blue-50);color:var(--blue-700);border-color:var(--blue-200);font-weight:600}.sidebar-q-left{align-items:baseline;gap:8px;display:flex}.q-num-tag{color:var(--blue-600);font-family:Fira Code,monospace;font-size:.74rem;font-weight:700}.q-title-label{flex:1}.q-check-icon{color:#10b981}.app-main-content{flex:1;max-width:1240px;margin:0 auto;padding:24px 32px}.question-top-bar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;margin-bottom:16px;display:flex}.question-meta-group{align-items:center;gap:10px;font-size:.78rem;font-weight:600;display:flex}.category-tag{background:var(--bg-primary);border:1px solid var(--border-color);color:var(--text-secondary);border-radius:6px;align-items:center;gap:6px;padding:4px 10px;display:inline-flex}.module-badge{background:var(--blue-50);color:var(--blue-700);border-radius:6px;padding:4px 8px}.tier-pill{text-transform:uppercase;border-radius:9999px;padding:3px 8px;font-size:.7rem;font-weight:700}.tier-pill.core{color:#15803d;background:#dcfce7}.tier-pill.intermediate{color:#1d4ed8;background:#eff6ff}.tier-pill.advanced{color:#7e22ce;background:#f3e8ff}.view-tabs-switcher{background-color:var(--bg-primary);border:1px solid var(--border-color);box-shadow:var(--shadow-sm);border-radius:10px;padding:3px;display:flex}.tab-nav-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:7px;align-items:center;gap:7px;padding:6px 14px;font-size:.82rem;font-weight:600;transition:all .2s;display:inline-flex}.tab-nav-btn:hover{color:var(--text-primary)}.tab-nav-btn.active{background-color:var(--blue-600);color:#fff;box-shadow:0 2px 6px #2563eb40}.question-title-heading{letter-spacing:-.02em;color:var(--text-primary);margin-bottom:6px;font-size:1.65rem;font-weight:800}.question-subtitle-text{color:var(--text-muted);margin-bottom:24px;font-size:.95rem}.visual-split-workspace{flex-direction:column;gap:20px;display:flex}.flow-step-selector-row{gap:8px;padding-bottom:4px;display:flex;overflow-x:auto}.step-selector-pill{background:var(--bg-primary);border:1.5px solid var(--border-color);color:var(--text-secondary);cursor:pointer;white-space:nowrap;border-radius:9999px;align-items:center;gap:8px;padding:8px 14px;font-size:.82rem;font-weight:600;transition:all .2s;display:inline-flex}.step-selector-pill:hover{border-color:var(--blue-400);background:var(--blue-50)}.step-selector-pill.active{background:var(--blue-600);color:#fff;border-color:var(--blue-600);box-shadow:0 2px 8px #2563eb4d}.step-selector-pill.active .pill-number-badge{color:var(--blue-600);background:#fff}.pill-number-badge{background:var(--bg-secondary);border-radius:50%;justify-content:center;align-items:center;width:18px;height:18px;font-size:.72rem;font-weight:800;display:inline-flex}.flow-split-grid{grid-template-columns:1fr 380px;gap:20px;display:grid}@media (width<=1024px){.flow-split-grid{grid-template-columns:1fr}}.interactive-stage-card{background:var(--bg-card);border:1px solid var(--border-color);min-height:380px;box-shadow:var(--shadow-sm);border-radius:14px;padding:24px;transition:background-color .25s,border-color .25s;position:relative;overflow:hidden}.cyber-grid-mesh{opacity:.5;pointer-events:none;background-image:radial-gradient(#cbd5e1 1px,#0000 1px);background-size:24px 24px;position:absolute;inset:0}.stage-laser-svg{pointer-events:none;width:100%;height:100%;position:absolute;top:0;left:0}.laser-arc-animated{animation:1.4s linear infinite laserDash}@keyframes laserDash{to{stroke-dashoffset:-32px}}.stage-telemetry-hud{background:#f8fafc;border:1px solid #e2e8f0;border-radius:10px;justify-content:space-between;align-items:center;margin-bottom:24px;padding:8px 16px;font-size:.82rem;display:flex;box-shadow:0 1px 3px #00000008}.telemetry-route-badge{color:#334155;align-items:center;gap:8px;font-weight:600;display:inline-flex}.pulse-icon{color:#2563eb;animation:1.8s infinite pulseBeacon}.route-arrow{color:#94a3b8}.route-text.highlight{color:#2563eb}.telemetry-status-pill{text-transform:uppercase;letter-spacing:.04em;border-radius:9999px;padding:3px 9px;font-size:.73rem;font-weight:700}.telemetry-status-pill.normal{color:#2563eb;background:#eff6ff;border:1px solid #bfdbfe}.telemetry-status-pill.defense{color:#059669;background:#ecfdf5;border:1px solid #a7f3d0}.telemetry-status-pill.attack{color:#dc2626;background:#fef2f2;border:1px solid #fecaca}.flying-packet-chip{color:#fff;z-index:10;background:linear-gradient(135deg,#2563eb,#0284c7);border-radius:9999px;align-items:center;gap:6px;padding:6px 14px;font-size:.78rem;font-weight:700;display:inline-flex;position:absolute;transform:translate(-50%,-50%);box-shadow:0 4px 12px #2563eb59}.stage-connecting-wire{z-index:1;background:#bfdbfe;height:3px;position:absolute;top:132px;left:10%;right:10%}.stage-nodes-row{z-index:2;justify-content:space-between;align-items:flex-start;margin-top:80px;display:flex;position:relative}.stage-node-item{flex-direction:column;align-items:center;width:22%;display:flex;position:relative}.node-beacon-ring{background:#fff;border:3px solid #93c5fd;border-radius:50%;width:16px;height:16px;margin-bottom:16px;transition:all .3s}.node-beacon-ring.active{background:#2563eb;border-color:#2563eb;box-shadow:0 0 0 4px #2563eb33}.node-box-enclosure{border:1.5px solid var(--border-color);text-align:center;width:100%;box-shadow:var(--shadow-sm);background:#fff;border-radius:12px;flex-direction:column;align-items:center;padding:16px 10px;transition:all .25s;display:flex;position:relative}.node-box-enclosure.current-step{background:#eff6ff;border-color:#2563eb;box-shadow:0 4px 12px #2563eb26}.node-live-tag{letter-spacing:.05em;white-space:nowrap;border-radius:6px;padding:2px 7px;font-size:.65rem;font-weight:800;animation:2s ease-in-out infinite bounceTag;position:absolute;top:-10px;left:50%;transform:translate(-50%);box-shadow:0 2px 5px #00000014}.node-live-tag.dispatch{color:#fff;background:#2563eb}.node-live-tag.verify{color:#fff;background:#059669}@keyframes bounceTag{0%,to{transform:translate(-50%)}50%{transform:translate(-50%,-3px)}}.node-icon-wrapper{color:#2563eb;background:#eff6ff;border-radius:10px;justify-content:center;align-items:center;width:38px;height:38px;margin-bottom:8px;display:flex}.node-main-title{color:var(--text-primary);font-size:.82rem;font-weight:700}.node-sub-title{color:var(--text-muted);word-break:break-all;font-size:.72rem}.stage-deep-explanation-container{text-align:left;background:#fff;border:1.5px solid #dbeafe;border-radius:12px;margin-top:36px;padding:16px 20px;box-shadow:0 4px 14px #2563eb0d}.stage-deep-header{border-bottom:1px solid #f1f5f9;justify-content:space-between;align-items:center;margin-bottom:12px;padding-bottom:10px;display:flex}.deep-title-group{color:#1e3a8a;align-items:center;gap:8px;font-size:.85rem;font-weight:700;display:inline-flex}.terminal-icon{color:#2563eb}.telemetry-protocol-tag{color:#2563eb;background:#eff6ff;border:1px solid #bfdbfe;border-radius:6px;padding:3px 8px;font-size:.72rem;font-weight:600}.deep-explanation-paragraph{color:#334155;margin:0 0 12px;font-size:.88rem;line-height:1.6}.deep-security-action-row{background:#f0fdf4;border:1px solid #bbf7d0;border-radius:8px;align-items:baseline;gap:8px;margin-bottom:12px;padding:8px 12px;font-size:.83rem;display:flex}.action-label{color:#15803d;white-space:nowrap;font-weight:700}.action-val{color:#166534;font-weight:500}.telemetry-headers-section{margin-top:10px}.btn-toggle-headers{color:#475569;cursor:pointer;background:#f8fafc;border:1px solid #cbd5e1;border-radius:6px;align-items:center;gap:6px;padding:5px 11px;font-size:.76rem;font-weight:600;transition:all .2s;display:inline-flex}.btn-toggle-headers:hover{color:#2563eb;background:#eff6ff;border-color:#93c5fd}.headers-terminal-box{color:#e2e8f0;background:#0f172a;border-radius:8px;margin-top:10px;padding:12px 14px;font-family:Fira Code,monospace;font-size:.78rem}.terminal-line{word-break:break-all;margin-bottom:5px}.terminal-line.method{color:#38bdf8;font-weight:600}.terminal-line.header{color:#94a3b8}.hdr-bullet{color:#64748b;margin-right:4px}.terminal-line.payload{color:#a7f3d0}.prompt{color:#64748b;margin-right:6px}.stage-scrubber-deck{border:1px solid var(--border-color);box-shadow:var(--shadow-sm);background:#fff;border-radius:10px;justify-content:space-between;align-items:center;margin-top:12px;padding:10px 16px;display:flex}.scrubber-controls-left{align-items:center;gap:8px;display:flex}.btn-play-circle{background:var(--blue-600);color:#fff;cursor:pointer;border:none;border-radius:50%;justify-content:center;align-items:center;width:32px;height:32px;display:flex;box-shadow:0 2px 6px #2563eb4d}.btn-skip-step,.btn-restart-pill{background:var(--bg-secondary);border:1px solid var(--border-color);color:var(--text-secondary);cursor:pointer;border-radius:6px;justify-content:center;align-items:center;gap:5px;padding:5px 10px;font-size:.76rem;font-weight:600;display:flex}.btn-skip-step:hover,.btn-restart-pill:hover{background:var(--blue-50);color:var(--blue-600)}.scrubber-range-middle{flex:1;margin:0 16px}.scrubber-track-range{width:100%;accent-color:var(--blue-600);cursor:pointer}.scrubber-speed-right{align-items:center;gap:8px;font-size:.78rem;font-weight:600;display:flex}.speed-select-drop{border:1px solid var(--border-color);background:var(--bg-primary);color:var(--text-secondary);border-radius:6px;padding:3px 6px;font-size:.75rem}.flow-insights-column{flex-direction:column;gap:16px;display:flex}.insight-panel-card{background:var(--bg-card);border:1px solid var(--border-color);box-shadow:var(--shadow-sm);border-radius:12px;padding:18px;transition:background-color .25s,border-color .25s}.insight-card-header{align-items:center;gap:10px;margin-bottom:12px;display:flex}.header-icon-pill{border-radius:8px;justify-content:center;align-items:center;width:32px;height:32px;display:flex}.header-icon-pill.yellow{color:#ca8a04;background:#fef9c3}.header-icon-pill.cyan{color:#0284c7;background:#e0f2fe}.header-text-group h3{color:var(--text-primary);font-size:.92rem;font-weight:700}.step-subheading{color:var(--blue-600);font-size:.76rem;font-weight:600}.what-happening-text{color:var(--text-secondary);font-size:.88rem;line-height:1.6}.why-it-matters-box{background:#eff6ff;border-left:3px solid #2563eb;border-radius:0 8px 8px 0;margin-top:14px;padding:10px 14px}.why-label{color:#1d4ed8;margin-bottom:4px;font-size:.75rem;font-weight:700;display:block}.why-text{color:#1e40af;margin:0;font-size:.83rem;line-height:1.5}.security-verdict-box{background:#ecfdf5;border-left:3px solid #059669;border-radius:0 8px 8px 0;margin-top:12px;padding:10px 14px}.verdict-label{color:#047857;margin-bottom:4px;font-size:.75rem;font-weight:700;display:block}.verdict-text{color:#065f46;margin:0;font-size:.83rem;line-height:1.5}.terms-definitions-list{flex-direction:column;gap:10px;display:flex}.term-definition-box{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:8px;padding:10px 12px}.term-name-tag{color:var(--blue-700);margin-bottom:3px;font-size:.78rem;font-weight:700}.term-meaning-text{color:var(--text-secondary);font-size:.8rem;line-height:1.45}.interview-takeaway-wide-card{border:1.5px solid var(--blue-200);box-shadow:var(--shadow-sm);background:linear-gradient(135deg,#eff6ff 0%,#f8fafc 100%);border-radius:12px;padding:18px 22px}.takeaway-header-bar{justify-content:space-between;align-items:center;margin-bottom:12px;display:flex}.takeaway-title-wrap{align-items:center;gap:10px;display:flex}.takeaway-icon-box{background:var(--blue-600);color:#fff;border-radius:8px;justify-content:center;align-items:center;width:32px;height:32px;display:flex}.takeaway-title-wrap h3{color:#1e3a8a;font-size:.95rem;font-weight:700}.takeaway-action-buttons{align-items:center;gap:8px;display:flex}.takeaway-btn-voice,.takeaway-btn-copy{border:1px solid var(--blue-200);color:var(--blue-700);cursor:pointer;background:#fff;border-radius:6px;align-items:center;gap:6px;padding:6px 12px;font-size:.78rem;font-weight:600;transition:all .2s;display:inline-flex}.takeaway-btn-voice:hover,.takeaway-btn-copy:hover{background:var(--blue-600);color:#fff;border-color:var(--blue-600)}.takeaway-verdict-quote{color:#1e293b;font-size:.95rem;font-style:italic;font-weight:500;line-height:1.6}.say-it-container{flex-direction:column;gap:20px;display:flex}.say-it-header-card{border:1.5px solid var(--blue-200);box-shadow:var(--shadow-sm);background:linear-gradient(135deg,#eff6ff 0%,#fff 100%);border-radius:14px;padding:24px}.say-it-badge{background:var(--blue-600);color:#fff;border-radius:9999px;align-items:center;gap:6px;margin-bottom:12px;padding:4px 10px;font-size:.75rem;font-weight:700;display:inline-flex}.say-it-prompt{color:var(--text-primary);margin-bottom:6px;font-size:1.25rem;font-weight:800}.say-it-subtitle{color:var(--text-muted);font-size:.88rem}.say-it-body-card{border:1px solid var(--border-color);box-shadow:var(--shadow-sm);background:#fff;border-radius:14px;flex-direction:column;gap:24px;padding:24px;display:flex}.speech-script-box{border:1.5px solid var(--blue-100);background:#f8fafc;border-radius:12px;padding:20px}.script-header-row{justify-content:space-between;align-items:center;margin-bottom:14px;display:flex}.script-label{color:var(--blue-700);text-transform:uppercase;letter-spacing:.04em;font-size:.82rem;font-weight:700}.speech-play-btn{background:var(--blue-600);color:#fff;cursor:pointer;border:none;border-radius:8px;align-items:center;gap:6px;padding:6px 14px;font-size:.8rem;font-weight:600;transition:all .2s;display:inline-flex}.speech-play-btn:hover{background:var(--blue-700)}.speech-script-text{color:var(--text-primary);font-size:1.05rem;font-weight:500;line-height:1.7}.key-phrases-title{color:var(--text-primary);margin-bottom:12px;font-size:.88rem;font-weight:700}.key-phrases-grid{flex-wrap:wrap;gap:10px;display:flex}.phrase-pill{color:#15803d;background:#f0fdf4;border:1px solid #bbf7d0;border-radius:8px;align-items:center;gap:6px;padding:6px 12px;font-size:.82rem;font-weight:600;display:inline-flex}.practice-timer-bar{border:1px solid var(--border-color);background:#f8fafc;border-radius:10px;justify-content:space-between;align-items:center;padding:14px 20px;display:flex}.timer-display{color:var(--text-secondary);align-items:center;gap:8px;display:flex}.timer-digits{color:var(--blue-600);font-family:Fira Code,monospace;font-size:1.25rem;font-weight:700}.timer-target{color:var(--text-muted);font-size:.78rem}.timer-actions{gap:10px;display:flex}.timer-btn{cursor:pointer;border-radius:8px;align-items:center;gap:6px;padding:8px 16px;font-size:.82rem;font-weight:600;transition:all .2s;display:inline-flex}.timer-btn.primary{background:var(--blue-600);color:#fff;border:none}.timer-btn.recording{color:#fff;background:#dc2626;border:none;animation:1.5s infinite pulseRecording}.timer-btn.secondary{border:1px solid var(--border-color);color:var(--text-secondary);background:#fff}.nail-it-container{flex-direction:column;display:flex}.nail-it-grid{grid-template-columns:repeat(2,1fr);gap:20px;display:grid}@media (width<=840px){.nail-it-grid{grid-template-columns:1fr}}.nail-it-card{border:1.5px solid var(--border-color);box-shadow:var(--shadow-sm);background:#fff;border-radius:14px;padding:22px}.nail-it-card.under-the-hood{border-top:4px solid #2563eb}.nail-it-card.takeaway{border-top:4px solid #10b981}.nail-it-card.traps{border-top:4px solid #f59e0b}.nail-it-card.senior{border-top:4px solid #8b5cf6}.nail-it-card-header{align-items:center;gap:10px;margin-bottom:14px;display:flex}.nail-icon-wrap{border-radius:8px;justify-content:center;align-items:center;width:34px;height:34px;display:flex}.nail-icon-wrap.blue{color:#2563eb;background:#eff6ff}.nail-icon-wrap.emerald{color:#059669;background:#ecfdf5}.nail-icon-wrap.amber{color:#d97706;background:#fffbeb}.nail-icon-wrap.purple{color:#7c3aed;background:#f5f3ff}.nail-it-card-header h3{color:var(--text-primary);font-size:.95rem;font-weight:700}.nail-it-text{color:var(--text-secondary);font-size:.9rem;line-height:1.6}.nail-it-list{flex-direction:column;gap:10px;list-style:none;display:flex}.trap-item{color:#991b1b;background:#fef2f2;border-radius:8px;align-items:flex-start;gap:8px;padding:8px 12px;font-size:.88rem;display:flex}.trap-bullet{font-weight:800}.senior-item{color:#1e3a8a;background:#eff6ff;border-radius:8px;align-items:flex-start;gap:8px;padding:8px 12px;font-size:.88rem;display:flex}.senior-check{color:#2563eb;flex-shrink:0;margin-top:2px}.challenge-studio-card{border:1.5px solid var(--border-color);box-shadow:var(--shadow-sm);background:#fff;border-radius:14px;flex-direction:column;gap:24px;padding:28px;display:flex}.challenge-hero-banner{align-items:flex-start;gap:14px;display:flex}.challenge-icon-box{color:#fff;background:linear-gradient(135deg,#2563eb,#0284c7);border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;width:42px;height:42px;display:flex}.challenge-tag{color:var(--blue-600);text-transform:uppercase;letter-spacing:.05em;margin-bottom:4px;font-size:.75rem;font-weight:700;display:inline-block}.challenge-question-title{color:var(--text-primary);font-size:1.25rem;font-weight:800;line-height:1.45}.challenge-options-list{flex-direction:column;gap:12px;width:100%;display:flex}.challenge-option-btn{border:1.5px solid var(--border-color);text-align:left;cursor:pointer;width:100%;color:var(--text-secondary);background:#fff;border-radius:10px;align-items:center;padding:14px 18px;font-size:.92rem;transition:all .2s;display:flex}.challenge-option-btn:hover:not(:disabled){border-color:var(--blue-400);background:var(--blue-50);transform:translateY(-1px)}.challenge-option-btn.is-selected{border-color:var(--blue-600);background:var(--blue-50);box-shadow:0 0 0 3px #2563eb26}.challenge-option-btn.is-correct{color:#065f46;background:#ecfdf5;border-color:#10b981;font-weight:600}.challenge-option-btn.is-wrong{color:#9f1239;background:#fff1f2;border-color:#f43f5e}.option-letter{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:6px;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;margin-right:14px;font-size:.82rem;font-weight:700;display:flex}.challenge-option-btn.is-selected .option-letter{background:var(--blue-600);color:#fff;border-color:var(--blue-600)}.option-text{flex:1;line-height:1.4}.icon-feedback{flex-shrink:0;margin-left:12px}.icon-feedback.correct{color:#10b981}.icon-feedback.wrong{color:#f43f5e}.challenge-action-row{justify-content:flex-end;display:flex}.submit-challenge-btn{background:var(--blue-600);color:#fff;cursor:pointer;border:none;border-radius:8px;padding:10px 24px;font-size:.9rem;font-weight:700;transition:all .2s;box-shadow:0 2px 8px #2563eb4d}.submit-challenge-btn:hover:not(:disabled){background:var(--blue-700)}.submit-challenge-btn:disabled{opacity:.5;cursor:not-allowed}.challenge-feedback-card{border-radius:12px;padding:18px 22px}.challenge-feedback-card.pass{color:#065f46;background:#ecfdf5;border:1.5px solid #a7f3d0}.challenge-feedback-card.fail{color:#9f1239;background:#fff1f2;border:1.5px solid #fecdd3}.feedback-header{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.feedback-header h3{flex:1;margin-left:8px;font-size:1rem;font-weight:700}.retry-btn{cursor:pointer;background:#fff;border:1px solid;border-radius:6px;align-items:center;gap:6px;padding:5px 12px;font-size:.78rem;font-weight:600;display:inline-flex}.feedback-explanation{margin:0;font-size:.88rem;line-height:1.55}.pagination-nav-deck{justify-content:space-between;gap:16px;margin-top:36px;display:flex}.nav-deck-btn{border:1.5px solid var(--border-color);color:var(--text-primary);box-shadow:var(--shadow-sm);background:#fff;border-radius:12px;flex:1;align-items:center;gap:12px;padding:14px 20px;text-decoration:none;transition:all .2s;display:flex}.nav-deck-btn:hover{border-color:var(--blue-500);background:var(--blue-50)}.deck-direction-tag{color:var(--blue-600);text-transform:uppercase;letter-spacing:.04em;font-size:.72rem;font-weight:700}.deck-target-title{color:var(--text-secondary);font-size:.88rem;font-weight:600}.step-selector-pill.passed{color:#059669;background:#f0fdf4;border-color:#10b981}.step-selector-pill.passed .pill-number-badge{color:#15803d;background:#dcfce7}.step-selector-pill.passed .pill-check-icon{color:#10b981;margin-left:4px;font-weight:800}:root.dark,.dark,body.dark,body.dark-mode{--bg-primary:#0b1120;--bg-secondary:#070b14;--bg-card:#111827;--bg-card-hover:#1f2937;--bg-panel:#1e293b;--border-color:#1f293d;--border-subtle:#334155;--border-focus:#38bdf8;--text-primary:#f8fafc;--text-secondary:#cbd5e1;--text-muted:#94a3b8;--text-dim:#64748b;--blue-50:#2563eb29;--blue-100:#2563eb42;--blue-200:#3b82f661}.dark body,body.dark-mode{color:#f8fafc;background-color:#070b14}.dark .app-header{background-color:#0b1120;border-bottom-color:#1f293d}.dark .brand-name{color:#f8fafc}.dark .brand-tag{color:#60a5fa}.dark .brand-status-pill{color:#93c5fd;background:#2563eb2e;border-color:#3b82f659}.dark .search-input{color:#f8fafc;background-color:#111827;border-color:#1f293d}.dark .search-input:focus{background-color:#0b1120;border-color:#3b82f6}.dark .kbd-shortcut{color:#94a3b8;background-color:#1e293b;border-color:#334155}.dark .theme-toggle-btn{color:#cbd5e1;background:#111827;border-color:#1f293d}.dark .theme-toggle-btn:hover{color:#60a5fa;background:#2563eb33}.dark .app-sidebar{background-color:#0b1120;border-right-color:#1f293d}.dark .sidebar-header-section{border-bottom-color:#1f293d}.dark .sidebar-main-title{color:#f8fafc}.dark .modules-count-pill{color:#93c5fd;background:#2563eb33;border-color:#3b82f659}.dark .progress-track-bg{background-color:#1e293b}.dark .curriculum-tier-group{border-bottom-color:#1f293d}.dark .tier-group-header{color:#94a3b8}.dark .tier-count-pill{color:#94a3b8;background:#1e293b}.dark .sidebar-question-link{color:#cbd5e1}.dark .sidebar-question-link:hover{color:#60a5fa;background-color:#111827}.dark .sidebar-question-link.active{color:#93c5fd;background-color:#2563eb38;border-color:#3b82f673}.dark .q-num-tag{color:#60a5fa}.dark .category-tag{color:#cbd5e1;background:#111827;border-color:#1f293d}.dark .module-badge{color:#93c5fd;background:#2563eb33}.dark .tier-pill.core{color:#34d399;background:#10b98129}.dark .view-tabs-switcher{background-color:#111827;border-color:#1f293d}.dark .tab-nav-btn{color:#94a3b8}.dark .tab-nav-btn:hover{color:#f8fafc}.dark .tab-nav-btn.active{color:#fff;background-color:#2563eb}.dark .question-title-heading{color:#f8fafc}.dark .question-subtitle-text{color:#94a3b8}.dark .step-selector-pill{color:#cbd5e1;background:#111827;border-color:#1f293d}.dark .step-selector-pill:hover{color:#93c5fd;background:#2563eb2e;border-color:#3b82f6}.dark .step-selector-pill .pill-number-badge{color:#94a3b8;background:#1e293b}.dark .step-selector-pill.active{color:#fff;background:#2563eb;border-color:#2563eb}.dark .step-selector-pill.active .pill-number-badge{color:#2563eb;background:#fff}.dark .step-selector-pill.passed{color:#34d399;background:#10b9811f;border-color:#059669}.dark .step-selector-pill.passed .pill-number-badge{color:#34d399;background:#10b98140}.dark .interactive-stage-card{background:#111827;border-color:#1f293d}.dark .cyber-grid-mesh{opacity:.35;background-image:radial-gradient(#334155 1px,#0000 1px)}.dark .stage-telemetry-hud{background:#0d1526;border-color:#1f293d}.dark .telemetry-route-badge{color:#cbd5e1}.dark .route-text.highlight{color:#60a5fa}.dark .stage-connecting-wire{background:#1e3a8a}.dark .node-box-enclosure{background:#0d1526;border-color:#1f293d}.dark .node-box-enclosure.current-step{background:#2563eb24;border-color:#3b82f6}.dark .node-icon-wrapper{color:#60a5fa;background:#2563eb38}.dark .node-main-title{color:#f8fafc}.dark .node-sub-title{color:#94a3b8}.dark .stage-deep-explanation-container{background:#0d1526;border-color:#2563eb4d}.dark .stage-deep-header{border-bottom-color:#1f293d}.dark .deep-title-group{color:#93c5fd}.dark .deep-explanation-paragraph{color:#cbd5e1}.dark .deep-security-action-row{background:#10b9811a;border-color:#10b98140}.dark .action-label{color:#34d399}.dark .action-val{color:#6ee7b7}.dark .btn-toggle-headers{color:#94a3b8;background:#111827;border-color:#1f293d}.dark .btn-toggle-headers:hover{color:#60a5fa;background:#2563eb26}.dark .headers-terminal-box{background:#050914;border:1px solid #1f293d}.dark .stage-scrubber-deck{background:#111827;border-color:#1f293d}.dark .btn-skip-step,.dark .btn-restart-pill{color:#cbd5e1;background:#0d1526;border-color:#1f293d}.dark .btn-skip-step:hover,.dark .btn-restart-pill:hover{color:#60a5fa;background:#2563eb33}.dark .speed-select-drop{color:#cbd5e1;background:#0d1526;border-color:#1f293d}.dark .step-counter-tag{color:#94a3b8}.dark .insight-panel-card{background:#111827;border-color:#1f293d}.dark .header-icon-pill.yellow{color:#facc15;background:#eab30833}.dark .header-icon-pill.cyan{color:#38bdf8;background:#0ea5e933}.dark .header-text-group h3{color:#f8fafc}.dark .step-subheading{color:#60a5fa}.dark .what-happening-text{color:#e2e8f0}.dark .why-it-matters-box{background:#2563eb24;border-left-color:#3b82f6}.dark .why-label{color:#93c5fd}.dark .why-text{color:#dbeafe}.dark .security-verdict-box{background:#10b98124;border-left-color:#10b981}.dark .verdict-label{color:#34d399}.dark .verdict-text{color:#d1fae5}.dark .terms-count-badge{color:#94a3b8;background:#1e293b}.dark .term-definition-box{background:#0d1526;border-color:#1f293d}.dark .term-name-tag{color:#93c5fd}.dark .term-meaning-text{color:#cbd5e1}.dark .interview-takeaway-wide-card{background:linear-gradient(135deg,#0d1526 0%,#111827 100%);border-color:#3b82f659}.dark .takeaway-title-wrap h3{color:#93c5fd}.dark .takeaway-verdict-quote{color:#e2e8f0}.dark .takeaway-btn-voice,.dark .takeaway-btn-copy{color:#93c5fd;background:#111827;border-color:#3b82f659}.dark .takeaway-btn-voice:hover,.dark .takeaway-btn-copy:hover{color:#fff;background:#2563eb}.dark .say-it-header-card{background:linear-gradient(135deg,#0d1526 0%,#111827 100%);border-color:#3b82f64d}.dark .say-it-prompt{color:#f8fafc}.dark .say-it-subtitle{color:#94a3b8}.dark .say-it-body-card{background:#111827;border-color:#1f293d}.dark .speech-script-box{background:#0d1526;border-color:#3b82f640}.dark .speech-script-text{color:#f8fafc}.dark .practice-timer-bar{background:#0d1526;border-color:#1f293d}.dark .nail-it-card{background:#111827;border-color:#1f293d}.dark .nail-it-card-header h3{color:#f8fafc}.dark .nail-it-text{color:#cbd5e1}.dark .trap-item{color:#fca5a5;background:#dc26261f}.dark .senior-item{color:#bfdbfe;background:#2563eb1f}.dark .challenge-studio-card{background:#111827;border-color:#1f293d}.dark .challenge-question-title{color:#f8fafc}.dark .challenge-option-btn{color:#cbd5e1;background:#0d1526;border-color:#1f293d}.dark .challenge-option-btn:hover:not(:disabled){color:#f8fafc;background:#2563eb2e;border-color:#3b82f6}.dark .option-letter{color:#e2e8f0;background:#1e293b;border-color:#334155}.dark .nav-deck-btn{color:#f8fafc;background:#111827;border-color:#1f293d}.dark .nav-deck-btn:hover{background:#2563eb29;border-color:#3b82f6}.dark .deck-direction-tag{color:#60a5fa}.dark .deck-target-title{color:#cbd5e1}