@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&display=swap');

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --primary: #6366f1;
            --secondary: #8b5cf6;
            --accent: #ec4899;
            --dark: #0f0f23;
            --darker: #070718;
            --card-bg: rgba(255, 255, 255, 0.03);
            --text-primary: #ffffff;
            --text-secondary: #94a3b8;
            --neon-blue: #00d4ff;
            --neon-pink: #ff0080;
            --neon-purple: #8000ff;
            --success: #10b981;
            --warning: #f59e0b;
            --gold: #fbbf24;
            --silver: #e5e7eb;
            --bronze: #d97706;
            --sidebar-width: 280px;
        }

        body {
            font-family: 'Space Grotesk', sans-serif;
            background: var(--dark);
            color: var(--text-primary);
            cursor: none;
            overflow-x: hidden;
        }

        /* Custom Cursor */
        .cursor {
            position: fixed;
            width: 20px;
            height: 20px;
            background: radial-gradient(circle, var(--neon-blue), transparent);
            border-radius: 50%;
            pointer-events: none;
            z-index: 9999;
            mix-blend-mode: difference;
            transition: transform 0.15s ease;
        }

        /* Animated Background */
        .bg-animation {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            background: linear-gradient(135deg, var(--dark) 0%, var(--darker) 100%);
        }

        .bg-animation::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: 
                radial-gradient(circle at 25% 25%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 75% 75%, rgba(236, 72, 153, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 50% 20%, rgba(251, 191, 36, 0.05) 0%, transparent 50%);
            animation: bgPulse 18s ease-in-out infinite alternate;
        }

        @keyframes bgPulse {
            0% { opacity: 0.4; transform: scale(1) rotate(0deg); }
            100% { opacity: 0.8; transform: scale(1.1) rotate(2deg); }
        }

        /* Floating Achievement Particles */
        .floating-achievements {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: -1;
        }

        .floating-trophy {
            position: absolute;
            font-size: 1.5rem;
            opacity: 0.1;
            animation: floatTrophy 25s linear infinite;
        }

        @keyframes floatTrophy {
            from {
                transform: translateY(100vh) rotate(0deg);
                opacity: 0;
            }
            10% { opacity: 0.1; }
            90% { opacity: 0.1; }
            to {
                transform: translateY(-100vh) rotate(360deg);
                opacity: 0;
            }
        }

        /* Layout */
        .achievements-container {
            display: flex;
            min-height: 100vh;
        }

        /* Sidebar */
        .sidebar {
            width: var(--sidebar-width);
            background: rgba(255, 255, 255, 0.02);
            backdrop-filter: blur(20px);
            border-right: 1px solid rgba(255, 255, 255, 0.1);
            padding: 2rem;
            position: fixed;
            height: calc(100vh - 80px);
            left: 0;
            top: 80px;
            z-index: 100;
            overflow-y: auto;
        }

        .sidebar-header {
            display: none;
        }

        .logo {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -2px;
            background: linear-gradient(135deg, var(--neon-blue), var(--neon-pink), var(--neon-purple));
            background-size: 300% 300%;
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            animation: gradientFlow 6s ease-in-out infinite;
            text-decoration: none;
        }

        @keyframes gradientFlow {
            0%, 100% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
        }

        .back-nav {
            color: var(--text-secondary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            margin-top: 1rem;
            transition: all 0.3s ease;
        }

        .back-nav:hover {
            color: var(--primary);
        }

        /* Achievement Summary */
        .achievement-summary {
            background: rgba(99, 102, 241, 0.1);
            border: 1px solid rgba(99, 102, 241, 0.2);
            border-radius: 16px;
            padding: 1.5rem;
            margin-bottom: 2rem;
            text-align: center;
        }

        .achievement-level {
            font-size: 3rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--gold), var(--warning));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 0.5rem;
        }

        .achievement-title {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }

        .achievement-subtitle {
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        .level-progress {
            margin-top: 1rem;
        }

        .level-bar {
            height: 8px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 4px;
            overflow: hidden;
            margin-bottom: 0.5rem;
        }

        .level-fill {
            height: 100%;
            background: linear-gradient(90deg, var(--gold), var(--warning));
            border-radius: 4px;
            transition: width 2s ease;
        }

        .level-text {
            font-size: 0.8rem;
            color: var(--text-secondary);
        }

        /* Category Filter */
        .category-filter {
            margin-bottom: 2rem;
        }

        .filter-title {
            margin-bottom: 1rem;
            font-weight: 600;
        }

        .filter-buttons {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .filter-btn {
            padding: 0.75rem 1rem;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 8px;
            color: var(--text-secondary);
            cursor: pointer;
            transition: all 0.3s ease;
            text-align: left;
            font-weight: 500;
        }

        .filter-btn:hover,
        .filter-btn.active {
            background: rgba(99, 102, 241, 0.1);
            border-color: var(--primary);
            color: var(--primary);
        }

        /* Leaderboard */
        .leaderboard {
            margin-top: 2rem;
        }

        .leaderboard-item {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 1rem;
            background: rgba(255, 255, 255, 0.02);
            border-radius: 12px;
            margin-bottom: 0.5rem;
            transition: all 0.3s ease;
        }

        .leaderboard-item:hover {
            background: rgba(255, 255, 255, 0.05);
        }

        .leaderboard-rank {
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
        }

        .leaderboard-rank.gold {
            background: linear-gradient(135deg, var(--gold), var(--warning));
        }

        .leaderboard-rank.silver {
            background: linear-gradient(135deg, #e5e7eb, #9ca3af);
            color: #374151;
        }

        .leaderboard-rank.bronze {
            background: linear-gradient(135deg, var(--bronze), #ea580c);
        }

        .leaderboard-info {
            flex: 1;
        }

        .leaderboard-name {
            font-weight: 600;
            margin-bottom: 0.25rem;
        }

        .leaderboard-score {
            color: var(--text-secondary);
            font-size: 0.8rem;
        }

        .leaderboard-badge {
            font-size: 1.2rem;
        }

        /* Main Content */
        .main-content {
            flex: 1;
            margin-left: var(--sidebar-width);
            padding: 2rem;
            margin-top: 80px;
            overflow-y: auto;
        }

        /* Header */
        .page-header {
            margin-bottom: 3rem;
        }

        .page-title {
            font-size: 3.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--neon-blue), var(--neon-pink), var(--gold));
            background-size: 300% 300%;
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            animation: gradientFlow 8s ease-in-out infinite;
            margin-bottom: 0.5rem;
        }

        .page-subtitle {
            color: var(--text-secondary);
            font-size: 1.2rem;
        }

        /* Stats Overview */
        .stats-overview {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1.5rem;
            margin-bottom: 3rem;
        }

        .stat-card {
            background: var(--card-bg);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 16px;
            padding: 2rem;
            text-align: center;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .stat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.1), transparent);
            transition: left 0.8s;
        }

        .stat-card:hover::before {
            left: 100%;
        }

        .stat-card:hover {
            transform: translateY(-5px);
            border-color: rgba(99, 102, 241, 0.3);
        }

        .stat-icon {
            font-size: 3rem;
            margin-bottom: 1rem;
            display: block;
        }

        .stat-value {
            font-size: 2.5rem;
            font-weight: 800;
            margin-bottom: 0.5rem;
            background: linear-gradient(135deg, var(--neon-blue), var(--neon-pink));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .stat-label {
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* Achievement Categories */
        .achievement-categories {
            margin-bottom: 3rem;
        }

        .category-tabs {
            display: flex;
            gap: 0;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 12px;
            padding: 6px;
            margin-bottom: 3rem;
            position: relative;
            overflow-x: auto;
        }

        .category-tab {
            padding: 14px 28px;
            background: transparent;
            border: none;
            color: var(--text-secondary);
            font-weight: 600;
            cursor: pointer;
            border-radius: 8px;
            transition: all 0.3s ease;
            white-space: nowrap;
            position: relative;
            z-index: 2;
        }

        .category-tab.active {
            color: var(--text-primary);
        }

        .tab-indicator {
            position: absolute;
            top: 6px;
            left: 6px;
            height: calc(100% - 12px);
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 8px;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            z-index: 1;
        }

        /* Achievements Grid */
        .achievements-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 1.5rem;
        }

        .achievement-card {
            background: var(--card-bg);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 20px;
            padding: 2rem;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            cursor: pointer;
            position: relative;
            overflow: hidden;
        }

        .achievement-card.earned {
            border-color: rgba(251, 191, 36, 0.4);
            background: rgba(251, 191, 36, 0.05);
        }

        .achievement-card.earned::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--gold), var(--warning));
        }

        .achievement-card.locked {
            opacity: 0.6;
            filter: grayscale(0.7);
        }

        .achievement-card:hover {
            transform: translateY(-8px) scale(1.02);
            box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
        }

        .achievement-card.earned:hover {
            box-shadow: 0 25px 50px rgba(251, 191, 36, 0.2);
        }

        .achievement-header {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            margin-bottom: 1.5rem;
        }

        .achievement-icon-large {
            font-size: 4rem;
            margin-bottom: 1rem;
            animation: pulse 3s ease-in-out infinite;
        }

        .achievement-card.earned .achievement-icon-large {
            animation: glow 2s ease-in-out infinite alternate;
        }

        @keyframes glow {
            from { filter: drop-shadow(0 0 10px rgba(251, 191, 36, 0.5)); }
            to { filter: drop-shadow(0 0 20px rgba(251, 191, 36, 0.8)); }
        }

        .achievement-rarity {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.7rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .rarity-common {
            background: linear-gradient(135deg, #6b7280, #9ca3af);
        }

        .rarity-rare {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
        }

        .rarity-epic {
            background: linear-gradient(135deg, var(--accent), var(--neon-pink));
        }

        .rarity-legendary {
            background: linear-gradient(135deg, var(--gold), var(--warning));
        }

        .achievement-name {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .achievement-description {
            color: var(--text-secondary);
            line-height: 1.5;
            margin-bottom: 1.5rem;
        }

        .achievement-progress {
            margin-bottom: 1rem;
        }

        .progress-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 0.5rem;
        }

        .progress-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        .progress-value {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--primary);
        }

        .achievement-progress-bar {
            height: 6px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 3px;
            overflow: hidden;
        }

        .achievement-progress-fill {
            height: 100%;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 3px;
            transition: width 1s ease;
        }

        .achievement-card.earned .achievement-progress-fill {
            background: linear-gradient(90deg, var(--gold), var(--warning));
        }

        .achievement-reward {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--success);
            font-size: 0.9rem;
            font-weight: 600;
        }

        .achievement-date {
            color: var(--text-secondary);
            font-size: 0.8rem;
            margin-top: 0.5rem;
        }

        /* Achievement Modal */
        .achievement-modal {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.8);
            backdrop-filter: blur(10px);
            z-index: 10000;
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }

        .achievement-modal.show {
            opacity: 1;
            visibility: visible;
        }

        .modal-content {
            background: var(--card-bg);
            backdrop-filter: blur(30px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 24px;
            padding: 3rem;
            text-align: center;
            max-width: 500px;
            width: 90%;
            transform: scale(0.8);
            transition: transform 0.3s ease;
        }

        .achievement-modal.show .modal-content {
            transform: scale(1);
        }

        .modal-icon {
            font-size: 6rem;
            margin-bottom: 1rem;
            animation: bounceIn 0.8s ease;
        }

        @keyframes bounceIn {
            0% { transform: scale(0) rotate(180deg); }
            50% { transform: scale(1.2) rotate(0deg); }
            100% { transform: scale(1) rotate(0deg); }
        }

        .modal-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, var(--gold), var(--warning));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .modal-description {
            color: var(--text-secondary);
            margin-bottom: 2rem;
            line-height: 1.6;
        }

        .modal-close {
            padding: 12px 24px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border: none;
            border-radius: 50px;
            color: white;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .modal-close:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(99, 102, 241, 0.3);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .sidebar {
                transform: translateX(-100%);
                transition: transform 0.3s ease;
            }

            .sidebar.open {
                transform: translateX(0);
            }

            .main-content {
                margin-left: 0;
                padding-top: 4rem;
            }

            .mobile-toggle {
                position: fixed;
                top: 100px;
                left: 20px;
                z-index: 101;
                background: var(--primary);
                border: none;
                border-radius: 50px;
                padding: 12px 16px;
                color: white;
                cursor: pointer;
            }
        }

        @media (max-width: 768px) {
            .main-content {
                padding: 4rem 1rem 1rem 1rem;
            }

            .page-title {
                font-size: 2.5rem;
            }

            .achievements-grid {
                grid-template-columns: 1fr;
            }

            .stats-overview {
                grid-template-columns: repeat(2, 1fr);
            }
        }