:root{--primary: #14b8a6;--primary-dark: #0d9488;--primary-light: #2dd4bf;--secondary: #10b981;--secondary-dark: #059669;--accent: #f59e0b;--danger: #ef4444;--success: #22c55e;--bg-primary: #121212;--bg-secondary: #1e1e1e;--bg-tertiary: #2d2d2d;--text-primary: #f5f5f5;--text-secondary: #a0a0a0;--text-muted: #707070;--border: #404040;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--radius-sm: .375rem;--radius-md: .5rem;--radius-lg: .75rem;--radius-xl: 1rem;--radius-full: 9999px;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1);--shadow-glow: 0 0 20px rgb(20 184 166 / .3)}*{margin:0;padding:0;box-sizing:border-box}html{font-size:16px}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg-primary);color:var(--text-primary);min-height:100vh;line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.2}h1{font-size:2.5rem}h2{font-size:2rem}h3{font-size:1.5rem}h4{font-size:1.25rem}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-sm);padding:var(--spacing-md) var(--spacing-xl);font-size:1rem;font-weight:500;border:none;border-radius:var(--radius-lg);cursor:pointer;transition:all .2s ease;text-decoration:none}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-dark);transform:translateY(-2px);box-shadow:var(--shadow-glow)}.btn-secondary{background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border)}.btn-secondary:hover:not(:disabled){background:var(--bg-secondary);border-color:var(--primary)}.btn-success{background:var(--success);color:#fff}.btn-success:hover:not(:disabled){background:var(--secondary-dark)}.btn-danger{background:var(--danger);color:#fff}.btn-large{padding:var(--spacing-lg) var(--spacing-2xl);font-size:1.125rem}.btn-block{width:100%}.card{background:var(--bg-secondary);border-radius:var(--radius-xl);padding:var(--spacing-xl);border:1px solid var(--border)}.card-header,.form-group{margin-bottom:var(--spacing-lg)}.form-label{display:block;margin-bottom:var(--spacing-sm);font-weight:500;color:var(--text-secondary)}.form-input{width:100%;padding:var(--spacing-md);background:var(--bg-tertiary);border:1px solid var(--border);border-radius:var(--radius-md);color:var(--text-primary);font-size:1rem;transition:border-color .2s}.form-input:focus{outline:none;border-color:var(--primary)}.form-input::placeholder{color:var(--text-muted)}.container{max-width:1200px;margin:0 auto;padding:var(--spacing-lg)}.container-sm{max-width:600px}.text-center{text-align:center}.text-muted{color:var(--text-muted)}.grid{display:grid;gap:var(--spacing-lg)}.grid-2{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}@media (max-width: 768px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.gap-sm{gap:var(--spacing-sm)}.gap-md{gap:var(--spacing-md)}.gap-lg{gap:var(--spacing-lg)}.mt-sm{margin-top:var(--spacing-sm)}.mt-md{margin-top:var(--spacing-md)}.mt-lg{margin-top:var(--spacing-lg)}.mt-xl{margin-top:var(--spacing-xl)}.mb-sm{margin-bottom:var(--spacing-sm)}.mb-md{margin-bottom:var(--spacing-md)}.mb-lg{margin-bottom:var(--spacing-lg)}.mb-xl{margin-bottom:var(--spacing-xl)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.animate-fade-in{animation:fadeIn .3s ease}.animate-slide-up{animation:slideUp .4s ease}.animate-pulse{animation:pulse 2s infinite}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--bg-tertiary);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.status-correct{color:var(--success)}.status-incorrect{color:var(--danger)}.status-waiting{color:var(--accent)}.badge{display:inline-flex;align-items:center;padding:var(--spacing-xs) var(--spacing-sm);font-size:.75rem;font-weight:500;border-radius:var(--radius-full);background:var(--bg-tertiary)}.badge-success{background:#22c55e33;color:var(--success)}.badge-warning{background:#f59e0b33;color:var(--accent)}.spinner{width:24px;height:24px;border:3px solid var(--bg-tertiary);border-top-color:var(--primary);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width: 768px){html{font-size:14px}.container{padding:var(--spacing-md)}h1{font-size:2rem}h2{font-size:1.5rem}h3{font-size:1.25rem}}