:root{--bg: #080b12;--panel: #0f1422;--panel-2: #0d1324;--card: #0f172a;--card-2: #0c1324;--border: #1c2740;--muted: #95a4c5;--text: #e9f1ff;--accent: #58c567;--accent-2: #79d085;--again: #ef4444;--hard: #f97316;--report-again: #ef4444;--report-hard: #f97316;--report-good: #facc15;--report-easy: #22c55e;--report-unanswered: #4b5563;--good: #22c55e;--warn: #f59e0b;--danger: #ef4444;--radius: 16px;--shadow: 0 25px 60px rgba(0, 0, 0, .45);--grade-2: #ef4444;--grade-3: #f97316;--grade-4: #eab308;--grade-5: #84cc16;--grade-6: #22c55e}*{box-sizing:border-box}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:#101822}::-webkit-scrollbar-thumb{background:#233348;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#324867}body{margin:0;font-family:Noto Sans,Inter,system-ui,-apple-system,sans-serif;background:radial-gradient(circle at 14% 20%,rgba(121,208,133,.09),transparent 28%),radial-gradient(circle at 92% 0%,rgba(88,197,103,.08),transparent 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10px);right:0;min-width:220px;z-index:100;display:none}.user-menu.nav-menu{background:linear-gradient(180deg,var(--panel) 0%,var(--panel-2) 100%);border:1px solid var(--border);border-radius:16px;box-shadow:0 24px 56px #0006,0 0 0 1px #ffffff0a;padding:12px 10px;overflow:hidden;opacity:0;transform:translateY(-8px);transition:opacity .2s ease,transform .2s ease;pointer-events:none}.user-dropdown.open .user-menu.nav-menu{display:block;opacity:1;transform:translateY(0);pointer-events:auto}.user-menu.nav-menu:before{content:"";position:absolute;top:-6px;right:18px;width:12px;height:12px;background:var(--panel);border-left:1px solid var(--border);border-top:1px solid var(--border);transform:rotate(45deg)}.nav-menu-section{display:flex;flex-direction:column;gap:4px;margin-bottom:14px}.nav-menu-section:last-of-type{margin-bottom:0}.nav-menu-section-label{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:var(--muted);padding:0 10px 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