:root{--font-main: "Plus Jakarta Sans", system-ui, -apple-system, sans-serif;--font-heading: "Outfit", sans-serif;--bg-dark: #0a0e17;--bg-card: rgba(18, 25, 43, .75);--bg-card-hover: rgba(26, 36, 62, .85);--bg-input: rgba(14, 20, 35, .9);--primary: #6366f1;--primary-glow: rgba(99, 102, 241, .35);--primary-light: #818cf8;--accent-cyan: #06b6d4;--accent-pink: #ec4899;--accent-emerald: #10b981;--accent-amber: #f59e0b;--accent-rose: #f43f5e;--text-main: #f8fafc;--text-muted: #94a3b8;--text-dim: #64748b;--border-subtle: rgba(255, 255, 255, .08);--border-glow: rgba(99, 102, 241, .4);--radius-sm: 8px;--radius-md: 14px;--radius-lg: 20px;--radius-full: 9999px;--shadow-card: 0 10px 30px -10px rgba(0, 0, 0, .6), 0 0 1px 1px rgba(255, 255, 255, .05);--shadow-glow: 0 0 25px var(--primary-glow)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-main);background-color:var(--bg-dark);color:var(--text-main);min-height:100vh;overflow-x:hidden;background-image:radial-gradient(circle at 15% 15%,rgba(99,102,241,.12) 0%,transparent 40%),radial-gradient(circle at 85% 85%,rgba(6,182,212,.1) 0%,transparent 40%),radial-gradient(circle at 50% 50%,rgba(236,72,153,.04) 0%,transparent 60%);background-attachment:fixed}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);letter-spacing:-.02em}.glass-panel{background:var(--bg-card);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);transition:border-color .2s,box-shadow .2s}.glass-panel:hover{border-color:#ffffff1f}.btn-primary{background:linear-gradient(135deg,#6366f1,#4f46e5);color:#fff;border:1px solid rgba(255,255,255,.2);padding:10px 20px;border-radius:var(--radius-md);font-weight:600;cursor:pointer;display:inline-flex;align-items:center;gap:8px;box-shadow:0 4px 14px var(--primary-glow);transition:all .2s ease}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px #6366f180;background:linear-gradient(135deg,#818cf8,#6366f1)}.btn-secondary{background:#ffffff0f;color:var(--text-main);border:1px solid var(--border-subtle);padding:9px 18px;border-radius:var(--radius-md);font-weight:500;cursor:pointer;display:inline-flex;align-items:center;gap:8px;transition:all .2s}.btn-secondary:hover{background:#ffffff1f;border-color:#fff3}.btn-danger{background:#f43f5e26;color:#fb7185;border:1px solid rgba(244,63,94,.3);padding:8px 16px;border-radius:var(--radius-md);cursor:pointer;display:inline-flex;align-items:center;gap:6px;transition:all .2s}.btn-danger:hover{background:#f43f5e;color:#fff}.form-input,.form-select,.form-textarea{width:100%;background:var(--bg-input);border:1px solid var(--border-subtle);color:var(--text-main);padding:11px 16px;border-radius:var(--radius-md);font-size:.95rem;font-family:inherit;outline:none;transition:border-color .2s,box-shadow .2s}.form-input:focus,.form-select:focus,.form-textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px #6366f140}.badge{padding:4px 10px;border-radius:var(--radius-full);font-size:.75rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;display:inline-flex;align-items:center;gap:4px}.badge-easy{background:#10b98126;color:#34d399;border:1px solid rgba(16,185,129,.3)}.badge-medium{background:#f59e0b26;color:#fbbf24;border:1px solid rgba(245,158,11,.3)}.badge-hard{background:#f43f5e26;color:#fb7185;border:1px solid rgba(244,63,94,.3)}.badge-purple{background:#6366f126;color:#a5b4fc;border:1px solid rgba(99,102,241,.3)}.chip{background:#ffffff12;border:1px solid rgba(255,255,255,.12);color:#e2e8f0;padding:5px 12px;border-radius:var(--radius-full);font-size:.85rem;display:inline-flex;align-items:center;gap:6px;font-weight:500}.chip-remove{cursor:pointer;opacity:.6;transition:opacity .2s}.chip-remove:hover{opacity:1;color:#fb7185}.nav-tab{padding:12px 24px;border-radius:var(--radius-md);font-weight:600;cursor:pointer;background:transparent;color:var(--text-muted);border:none;display:flex;align-items:center;gap:10px;font-size:1rem;transition:all .25s ease}.nav-tab:hover{color:var(--text-main);background:#ffffff0d}.nav-tab.active{color:#fff;background:linear-gradient(135deg,#6366f140,#06b6d433);border:1px solid var(--border-glow);box-shadow:0 4px 15px #6366f133}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000bf;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px;animation:fadeIn .2s ease}.modal-content{background:#111827;border:1px solid rgba(255,255,255,.15);border-radius:var(--radius-lg);max-width:650px;width:100%;max-height:90vh;overflow-y:auto;box-shadow:0 25px 50px -12px #000c,0 0 30px var(--primary-glow);padding:28px;position:relative;animation:slideUp .25s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:#0f172a80}::-webkit-scrollbar-thumb{background:#ffffff26;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#ffffff4d}