.activity-container {
            max-width: 1000px;
            margin: 2rem auto;
            padding: 2rem;
            background: rgba(30, 30, 50, 0.95);
            border-radius: 15px;
            box-shadow: 0 0 30px rgba(106, 17, 203, 0.5);
            border: 2px solid var(--accent);
        }

        .activity-header {
            text-align: center;
            padding-bottom: 1.5rem;
            border-bottom: 2px solid var(--accent);
        }

        .activity-title {
            font-size: 2.5rem;
            color: #ffd700;
            text-shadow: 0 0 15px rgba(255, 215, 0, 0.7);
            margin-bottom: 0.5rem;
            background: linear-gradient(90deg, #ffd700, #ff8c00);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .activity-subtitle {
            color: #aaa;
            font-size: 1.2rem;
            margin-top: 0.5rem;
        }

        .reward-card {
            background: linear-gradient(135deg, #2c3e50, #4a235a);
            border-radius: 15px;
            padding: 2rem;
            margin: 2rem 0;
            border: 2px solid var(--accent);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
            position: relative;
            overflow: hidden;
        }

        .reward-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(circle at top right, rgba(106, 17, 203, 0.2), transparent 70%);
            pointer-events: none;
        }

        .reward-header {
            text-align: center;
            margin-bottom: 1.5rem;
            position: relative;
        }

        .reward-header h3 {
            font-size: 1.8rem;
            color: #ffd700;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }

        .reward-items {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1.5rem;
            margin-bottom: 2rem;
        }

        .reward-item {
            background: rgba(40, 40, 60, 0.8);
            border-radius: 10px;
            padding: 1.2rem;
            text-align: center;
            border: 1px solid rgba(106, 17, 203, 0.4);
            transition: all 0.3s ease;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
        }

        .reward-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(106, 17, 203, 0.4);
        }

        .reward-icon {
            font-size: 2.5rem;
            color: #ffd700;
            margin-bottom: 0.8rem;
        }

        .reward-name {
            font-size: 1.1rem;
            color: #ddd;
            margin-bottom: 0.5rem;
        }

        .reward-amount {
            font-size: 1.5rem;
            color: #ffd700;
            font-weight: bold;
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-group label {
            display: block;
            margin-bottom: 0.8rem;
            font-size: 1.2rem;
            color: #ddd;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .character-list {
            display: flex;
            flex-direction: column;
            gap: 15px;
            margin-top: 10px;
            max-height: 300px;
            overflow-y: auto;
            padding: 15px;
            border: 1px solid rgba(106, 17, 203, 0.4);
            border-radius: 10px;
            background: rgba(40, 40, 60, 0.7);
        }

        .character-option {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 15px;
            background: rgba(60, 60, 80, 0.7);
            border-radius: 10px;
            cursor: pointer;
            transition: all 0.3s ease;
            border: 1px solid transparent;
        }

        .character-option:hover {
            background: rgba(106, 17, 203, 0.2);
            border-color: rgba(106, 17, 203, 0.4);
        }

        .character-option.selected {
            background: rgba(106, 17, 203, 0.3);
            border-color: var(--primary);
            transform: scale(1.02);
        }

        .character-avatar {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 1.4rem;
            color: white;
        }

        .character-info {
            flex-grow: 1;
        }

        .character-name {
            font-weight: 600;
            color: #fff;
            margin-bottom: 0.3rem;
            font-size: 1.1rem;
        }

        .character-details {
            display: flex;
            gap: 15px;
            font-size: 0.9rem;
            color: #aaa;
        }

        .claim-btn {
            padding: 15px 40px;
            background: linear-gradient(135deg, var(--accent), #ff416c);
            color: white;
            border: none;
            border-radius: 50px;
            font-size: 1.3rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            margin: 1.5rem auto;
            display: block;
            box-shadow: 0 6px 25px rgba(255, 45, 117, 0.5);
            position: relative;
            overflow: hidden;
        }

        .claim-btn:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(255, 45, 117, 0.7);
        }

        .claim-btn:disabled {
            background: #555;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }

        .claim-btn:not(:disabled)::after {
            content: "";
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: linear-gradient(
                to right,
                rgba(255,255,255,0) 0%,
                rgba(255,255,255,0.1) 50%,
                rgba(255,255,255,0) 100%
            );
            transform: rotate(30deg);
            animation: shine 3s infinite;
        }

        @keyframes shine {
            0% { transform: rotate(30deg) translateX(-100%); }
            100% { transform: rotate(30deg) translateX(100%); }
        }

        .result-message {
            text-align: center;
            padding: 1.2rem;
            margin-top: 1.2rem;
            border-radius: 10px;
            font-weight: 500;
            display: none;
            animation: fadeIn 0.5s ease;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(-10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .success-msg {
            background: rgba(46, 204, 113, 0.2);
            color: #2ecc71;
            border: 1px solid rgba(46, 204, 113, 0.4);
        }

        .error-msg {
            background: rgba(231, 76, 60, 0.2);
            color: #e74c3c;
            border: 1px solid rgba(231, 76, 60, 0.4);
        }

        .offline-warning {
            background: rgba(255, 45, 117, 0.2);
            border: 1px solid var(--accent);
            border-radius: 8px;
            padding: 15px;
            margin: 1.5rem 0;
            text-align: center;
            font-size: 1.1rem;
        }

        .note {
            background: rgba(255, 215, 0, 0.1);
            border-left: 4px solid #ffd700;
            padding: 12px 15px;
            margin: 1.5rem 0;
            border-radius: 4px;
            font-size: 1.1rem;
        }