*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg-primary: #0a0a0f;--bg-secondary: #111118;--bg-card: #16161f;--bg-card-hover: #1e1e2a;--border: #2a2a3a;--border-bright: #3a3a50;--accent: #6c63ff;--accent-hover: #7c73ff;--accent-glow: rgba(108, 99, 255, .3);--accent-dim: rgba(108, 99, 255, .15);--green: #00d4aa;--green-dim: rgba(0, 212, 170, .15);--red: #ff4d6d;--red-dim: rgba(255, 77, 109, .15);--yellow: #ffd166;--yellow-dim: rgba(255, 209, 102, .15);--blue: #4cc9f0;--text-primary: #f0f0f8;--text-secondary: #9090b0;--text-muted: #5a5a7a;--font-sans: "Inter", system-ui, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", monospace;--radius-sm: 6px;--radius-md: 12px;--radius-lg: 20px;--radius-xl: 28px;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .4);--shadow-md: 0 4px 24px rgba(0, 0, 0, .5);--shadow-lg: 0 8px 48px rgba(0, 0, 0, .6);--shadow-accent: 0 0 40px rgba(108, 99, 255, .2)}html,body{height:100%;background-color:var(--bg-primary);color:var(--text-primary);font-family:var(--font-sans);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased}#root{min-height:100vh;display:flex;flex-direction:column}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--border-bright);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.container{max-width:1200px;margin:0 auto;padding:0 24px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 20px;border-radius:var(--radius-sm);font-family:var(--font-sans);font-size:14px;font-weight:600;cursor:pointer;border:none;transition:all .2s ease;text-decoration:none;white-space:nowrap}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--accent);color:#fff;box-shadow:0 0 20px var(--accent-glow)}.btn-primary:hover:not(:disabled){background:var(--accent-hover);box-shadow:0 0 30px var(--accent-glow);transform:translateY(-1px)}.btn-secondary{background:var(--bg-card);color:var(--text-primary);border:1px solid var(--border)}.btn-secondary:hover:not(:disabled){background:var(--bg-card-hover);border-color:var(--border-bright)}.btn-danger{background:var(--red-dim);color:var(--red);border:1px solid rgba(255,77,109,.3)}.btn-danger:hover:not(:disabled){background:#ff4d6d40}.btn-lg{padding:14px 32px;font-size:16px;border-radius:var(--radius-md)}.btn-sm{padding:6px 14px;font-size:13px}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px}.badge{display:inline-flex;align-items:center;padding:3px 10px;border-radius:100px;font-size:12px;font-weight:600}.badge-easy{background:var(--green-dim);color:var(--green)}.badge-medium{background:var(--yellow-dim);color:var(--yellow)}.badge-hard{background:var(--red-dim);color:var(--red)}.input{width:100%;padding:12px 16px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);font-family:var(--font-sans);font-size:14px;outline:none;transition:border-color .2s}.input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-dim)}.input::placeholder{color:var(--text-muted)}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes glow{0%,to{box-shadow:0 0 20px var(--accent-glow)}50%{box-shadow:0 0 40px var(--accent-glow),0 0 60px var(--accent-glow)}}@keyframes slideIn{0%{opacity:0;transform:translate(-20px)}to{opacity:1;transform:translate(0)}}@keyframes countUp{0%{transform:scale(.8);opacity:0}to{transform:scale(1);opacity:1}}.animate-fade{animation:fadeIn .4s ease forwards}.animate-pulse{animation:pulse 2s ease infinite}.animate-spin{animation:spin 1s linear infinite}.animate-glow{animation:glow 2s ease infinite}.spinner{width:24px;height:24px;border:2px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}.page{flex:1;display:flex;flex-direction:column;animation:fadeIn .3s ease}.navbar{display:flex;align-items:center;justify-content:space-between;padding:16px 32px;background:#0a0a0fcc;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}.navbar-logo{font-size:22px;font-weight:900;background:linear-gradient(135deg,var(--accent),var(--blue));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-.5px}.navbar-actions{display:flex;align-items:center;gap:12px}.navbar-user{display:flex;align-items:center;gap:10px;padding:6px 14px;background:var(--bg-card);border:1px solid var(--border);border-radius:100px}.navbar-rating{font-size:13px;font-weight:700;color:var(--accent)}.form-group{display:flex;flex-direction:column;gap:6px}.form-label{font-size:13px;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px}.form-error{font-size:13px;color:var(--red);margin-top:4px}.gradient-text{background:linear-gradient(135deg,var(--accent),var(--blue));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.divider{height:1px;background:var(--border);margin:16px 0}.status-dot{width:8px;height:8px;border-radius:50%}.status-dot.online{background:var(--green);box-shadow:0 0 6px var(--green)}.status-dot.offline{background:var(--text-muted)}.status-dot.searching{background:var(--yellow);animation:pulse 1s ease infinite}