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var(--nav-height,64px));justify-content:center;align-items:center;padding:2rem;display:flex;position:relative;overflow:hidden}.error-canvas{pointer-events:none;opacity:.6;width:100%;height:100%;position:absolute;inset:0}.error-content{z-index:1;text-align:center;flex-direction:column;align-items:center;gap:1rem;max-width:520px;animation:.5s both error-fade-in;display:flex;position:relative}@keyframes error-fade-in{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}.error-code-wrap{pointer-events:none;-webkit-user-select:none;user-select:none;z-index:0;position:absolute;top:50%;left:50%;transform:translate(-50%,-62%)}.error-code-bg{letter-spacing:-6px;background:linear-gradient(160deg, var(--glow) 0%, transparent 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var(--border-color);border-radius:12px;flex-direction:column;height:60vh;min-height:420px;max-height:750px;display:flex;overflow:hidden;box-shadow:0 4px 20px #0000000f}.ssh-topbar{background:var(--bg-hover);border-bottom:1px solid var(--border-color);-webkit-user-select:none;user-select:none;justify-content:space-between;align-items:center;padding:.65rem 1rem;display:flex}.ssh-window-dots{gap:8px;display:flex}.ssh-dot{border-radius:50%;width:12px;height:12px}.ssh-dot--close{background:#ff5f57}.ssh-dot--minimize{background:#febc2e}.ssh-dot--maximize{background:#28c840}.ssh-topbar-center{text-align:center;color:var(--text-muted);flex:1;justify-content:center;align-items:center;gap:6px;font-size:.82rem;font-weight:500;display:flex}.ssh-topbar-right{align-items:center;gap:.6rem;display:flex}.ssh-status{color:var(--text-muted);align-items:center;gap:.35rem;font-size:.72rem;font-weight:600;display:flex}.ssh-topbar-btn{background:var(--bg-primary);border:1px solid var(--border-color);cursor:pointer;color:var(--text-muted);border-radius:8px;align-items:center;gap:.3rem;padding:.35rem .65rem;font-family:inherit;font-size:.75rem;font-weight:500;transition:all .15s;display:flex}.ssh-topbar-btn:hover{color:var(--text-main);border-color:var(--text-muted)}.ssh-topbar-btn--danger:hover{color:#f7768e;background:#f7768e14;border-color:#f7768e66}.ssh-terminal{color:#d4d4d4;cursor:text;background:#1e1e1e;flex:1;min-height:0;padding:1rem 1.2rem;font-family:Ubuntu Mono,JetBrains Mono,Fira Code,monospace;font-size:.95rem;font-weight:500;line-height:1.65;overflow-y:auto}.ssh-line{white-space:pre-wrap;word-break:break-word;margin:0;padding:2px 0}.ssh-line--prompt{color:#4af626;font-weight:700}.ssh-line--dir{color:#7aa2f7;font-weight:600}.ssh-line--exec{color:#9ece6a;font-weight:600}.ssh-line--link{color:#7dcfff;font-weight:500}.ssh-line--error{color:#f7768e;font-weight:600}.ssh-line--success{color:#9ece6a;font-weight:700}.ssh-line--warning{color:#e0af68;font-weight:600}.ssh-line--info{color:#a9b1d6;font-weight:400}.ssh-line--cmd{color:#c0caf5;font-weight:600}.ssh-prompt-user{color:#e95420;font-weight:700}.ssh-prompt-host{color:#4af626;font-weight:600}.ssh-prompt-path{color:#729fcf;font-weight:600}.ssh-prompt-sep{color:silver;font-weight:500}.ssh-typed-text{color:#fff;font-weight:500}.ssh-terminal::-webkit-scrollbar{width:8px}.ssh-terminal::-webkit-scrollbar-track{background:0 0}.ssh-terminal::-webkit-scrollbar-thumb{background:#444;border-radius:99px}.ssh-terminal::-webkit-scrollbar-thumb:hover{background:#666}@keyframes spin{to{transform:rotate(360deg)}}.ssh-terminal{cursor:text;outline:none}.ssh-cursor{animation:1s step-end infinite ssh-blink}@keyframes ssh-blink{0%,to{opacity:1}50%{opacity:0}}:root{--md-sys-color-background:#111318;--md-sys-color-surface:#1a1c1e;--md-sys-color-surface-container:#23282f;--md-sys-color-surface-container-high:#2a3039;--md-sys-color-on-surface:#e2e2e6;--md-sys-color-on-surface-variant:#c3c6cf;--md-sys-color-primary:#a8c7fa;--md-sys-color-on-primary:#062e6f;--md-sys-color-primary-container:#0b57d0;--md-sys-color-on-primary-container:#d3e3fd;--md-sys-color-outline-variant:#43474e;--md-sys-color-success:#6cdb8e;--md-sys-color-success-container:#005325;--md-sys-color-error:#ffb4ab;--md-sys-color-error-container:#93000a;--md-shape-corner-medium:16px;--md-shape-corner-large:28px;--md-shape-corner-full:100px}.app-container{flex-direction:column;justify-content:center;align-items:center;width:100%;max-width:760px;margin:0 auto;padding:40px 16px;display:flex}.card{background-color:var(--md-sys-color-surface);border-radius:var(--md-shape-corner-large);width:100%;margin-bottom:32px;overflow:hidden}.app-footer{border-top:1px solid var(--md-sys-color-outline-variant);width:100%;margin-top:16px;padding-top:32px}.footer-grid{grid-template-columns:2fr repeat(2,1fr);gap:40px;margin-bottom:32px;display:grid}@media (width<=600px){.footer-grid{grid-template-columns:1fr;gap:24px}}.footer-brand h3{color:var(--md-sys-color-on-surface);margin-bottom:12px;font-family:Google Sans,sans-serif;font-size:18px;font-weight:500}.footer-brand p{color:var(--md-sys-color-on-surface-variant);font-size:14px;line-height:1.6}.footer-sect h4{letter-spacing:.5px;text-transform:uppercase;color:var(--md-sys-color-primary);margin-bottom:16px;font-family:Google Sans,sans-serif;font-size:14px;font-weight:700}.footer-sect ul{list-style:none}.footer-sect ul li{margin-bottom:10px}.footer-sect ul li a{color:var(--md-sys-color-on-surface-variant);font-size:14px;text-decoration:none;transition:color .15s}.footer-sect ul li a:hover{color:var(--md-sys-color-primary)}.footer-bottom{text-align:center;color:var(--md-sys-color-on-surface-variant);border-top:1px solid #ffffff0d;padding:16px 0;font-size:12px}.start-header{padding:40px 40px 16px}.start-logo{align-items:center;gap:6px;margin-bottom:32px;display:flex}.start-logo-dot{border-radius:var(--md-shape-corner-full);width:10px;height:10px}.dot-b{background-color:#4285f4}.dot-g{background-color:#34a853}.dot-r{background-color:#ea4335}.dot-y{background-color:#fbbc05}.start-label{color:var(--md-sys-color-on-surface-variant);margin-left:6px;font-family:Google Sans,sans-serif;font-size:14px;font-weight:500}.start-title{letter-spacing:-.5px;color:var(--md-sys-color-on-surface);margin-bottom:24px;font-family:Google 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0;display:flex}.q-counter{color:var(--md-sys-color-on-surface-variant);white-space:nowrap;font-family:Google Sans,sans-serif;font-size:14px;font-weight:500}.progress-track{background-color:var(--md-sys-color-surface-container-high);border-radius:var(--md-shape-corner-full);flex:1;height:4px;overflow:hidden}.progress-fill{background-color:var(--md-sys-color-primary);border-radius:var(--md-shape-corner-full);height:100%;transition:width .4s cubic-bezier(.4,0,.2,1)}.score-badge{color:var(--md-sys-color-primary);font-family:Google Sans,sans-serif;font-size:14px;font-weight:700}.quiz-body{padding:32px 40px 40px}.category-chip{background-color:var(--md-sys-color-surface-container);border-radius:var(--md-shape-corner-medium);color:var(--md-sys-color-on-surface-variant);align-items:center;gap:8px;margin-bottom:24px;padding:6px 16px;font-family:Google Sans,sans-serif;font-size:13px;font-weight:500;display:inline-flex}.category-chip .dot{border-radius:var(--md-shape-corner-full);width:6px;height:6px}.category-chip.lsp .dot{background-color:var(--md-sys-color-primary)}.category-chip.clean .dot{background-color:#34a853}.question-text{margin-bottom:32px;font-family:Google Sans,sans-serif;font-size:24px;font-weight:400;line-height:1.4}.answers{flex-direction:column;gap:12px;display:flex}.answer-btn{text-align:left;border-radius:var(--md-shape-corner-medium);background-color:var(--md-sys-color-surface-container);cursor:pointer;width:100%;color:var(--md-sys-color-on-surface);border:none;align-items:center;gap:20px;padding:20px 24px;font-size:16px;line-height:1.45;transition:background-color .15s;display:flex}.answer-btn:hover:not(:disabled){background-color:var(--md-sys-color-surface-container-high)}.answer-letter{border-radius:var(--md-shape-corner-full);background-color:var(--md-sys-color-surface);width:28px;height:28px;color:var(--md-sys-color-on-surface-variant);border:1px solid var(--md-sys-color-outline-variant);flex-shrink:0;justify-content:center;align-items:center;font-family:Google Sans,sans-serif;font-size:13px;font-weight:700;display:flex}.answer-btn.correct{background-color:var(--md-sys-color-success-container);color:#c4eed0}:root{--bg-primary:#212121;--bg-secondary:#1e1e1e;--bg-hover:#2c2c2c;--border-color:#333;--text-main:#e0e0e0;--text-muted:#9e9e9e;--color-primary:#fff;--color-primary-hover:#e5e5e5;--color-primary-dim:#ffffff1a;--space-xs:.5rem;--space-sm:1rem;--space-md:2rem;--space-lg:4rem;--space-xl:6rem;--nav-height:70px}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-primary);color:var(--text-main);-webkit-font-smoothing:antialiased;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6}#root{flex-direction:column;min-height:100vh;display:flex}h1,h2,h3,h4,h5,h6{color:var(--color-primary);font-weight:700;line-height:1.2}a{color:var(--color-primary);text-decoration:none;transition:color .2s ease-in-out}a:hover{color:var(--color-primary-hover)}.container{width:100%;max-width:1200px;padding:0 var(--space-sm);margin:0 auto}.text-primary{color:var(--color-primary)}.bg-card{background-color:var(--bg-secondary);padding:var(--space-md);border:1px solid var(--border-color);border-radius:12px}.btn{cursor:pointer;border:1px solid #0000;border-radius:6px;justify-content:center;align-items:center;padding:.5rem 1.2rem;font-family:inherit;font-size:.9rem;font-weight:500;transition:all .2s cubic-bezier(.16,1,.3,1);display:inline-flex}.btn-primary{background-color:var(--text-main);color:var(--bg-primary)}.btn-primary:hover{background-color:var(--text-main);color:var(--bg-primary);opacity:.9;transform:translateY(-1px)}.btn-outline{color:var(--text-main);border:1px solid var(--border-color);background-color:#0000}.btn-outline:hover{color:var(--text-main);background-color:var(--color-primary-dim);opacity:1;border-color:#0000}.flex{display:flex}.items-center{align-items:center}.justify-between{justify-content:space-between}.justify-center{justify-content:center}.gap-2{gap:.5rem}.gap-4{gap:1rem}.w-full{width:100%}.hero-section{height:calc(100vh - var(--nav-height));flex-direction:column;justify-content:center;min-height:500px;display:flex}.auth-wrapper{width:100%;min-height:calc(100vh - var(--nav-height) - 200px);justify-content:center;align-items:center;display:flex}@media (width<=768px){.hero-section{height:auto;padding:3rem 0}.auth-wrapper{min-height:auto;padding:2rem 1rem}}